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GitHub - FractalFir/tmf: Tight Model format is an experimental lossy 3D model format focused on reducing file size as much as posible without decreasing visual quality of the viewed model or read speeds.
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flex-auto rounded rounded-lg-0"> <nav class="HeaderMenu-nav" aria-label="Global"> <ul class="d-lg-flex list-style-none"> <li class="HeaderMenu-item position-relative flex-wrap flex-justify-between flex-items-center d-block d-lg-flex flex-lg-nowrap flex-lg-items-center js-details-container js-header-menu-item"> <button type="button" class="HeaderMenu-link border-0 width-full width-lg-auto px-0 px-lg-2 py-lg-2 no-wrap d-flex flex-items-center flex-justify-between js-details-target" aria-expanded="false"> Product <svg opacity="0.5" aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-chevron-down HeaderMenu-icon ml-1"> <path d="M12.78 5.22a.749.749 0 0 1 0 1.06l-4.25 4.25a.749.749 0 0 1-1.06 0L3.22 6.28a.749.749 0 1 1 1.06-1.06L8 8.939l3.72-3.719a.749.749 0 0 1 1.06 0Z"></path> </svg> </button> <div class="HeaderMenu-dropdown dropdown-menu rounded m-0 p-0 pt-2 pt-lg-4 position-relative position-lg-absolute left-0 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1-.052-1.086c0-1.331.282-2.499 1.132-3.368.397-.406.89-.717 1.474-.952 1.399-1.136 3.392-2.093 6.122-2.093 2.731 0 4.767.957 6.166 2.093.584.235 1.077.546 1.474.952.85.869 1.132 2.037 1.132 3.368 0 .368-.014.733-.052 1.086.23.462.477 1.088.644 1.517 1.258.364 2.233 1.721 2.605 2.656a.832.832 0 0 1 .053.22v2.869a.641.641 0 0 1-.078.256ZM12.172 11h-.344a4.323 4.323 0 0 1-.355.508C10.703 12.455 9.555 13 7.965 13c-1.725 0-2.989-.359-3.782-1.259a2.005 2.005 0 0 1-.085-.104L4 11.741v6.585c1.435.779 4.514 2.179 8 2.179 3.486 0 6.565-1.4 8-2.179v-6.585l-.098-.104s-.033.045-.085.104c-.793.9-2.057 1.259-3.782 1.259-1.59 0-2.738-.545-3.508-1.492a4.323 4.323 0 0 1-.355-.508h-.016.016Zm.641-2.935c.136 1.057.403 1.913.878 2.497.442.544 1.134.938 2.344.938 1.573 0 2.292-.337 2.657-.751.384-.435.558-1.15.558-2.361 0-1.14-.243-1.847-.705-2.319-.477-.488-1.319-.862-2.824-1.025-1.487-.161-2.192.138-2.533.529-.269.307-.437.808-.438 1.578v.021c0 .265.021.562.063.893Zm-1.626 0c.042-.331.063-.628.063-.894v-.02c-.001-.77-.169-1.271-.438-1.578-.341-.391-1.046-.69-2.533-.529-1.505.163-2.347.537-2.824 1.025-.462.472-.705 1.179-.705 2.319 0 1.211.175 1.926.558 2.361.365.414 1.084.751 2.657.751 1.21 0 1.902-.394 2.344-.938.475-.584.742-1.44.878-2.497Z"></path><path d="M14.5 14.25a1 1 0 0 1 1 1v2a1 1 0 0 1-2 0v-2a1 1 0 0 1 1-1Zm-5 0a1 1 0 0 1 1 1v2a1 1 0 0 1-2 0v-2a1 1 0 0 1 1-1Z"></path> </svg> <div> <div class="color-fg-default h4">GitHub Copilot</div> Write better code with AI </div> </a></li> <li> <a class="HeaderMenu-dropdown-link d-block no-underline position-relative py-2 Link--secondary d-flex flex-items-center Link--has-description pb-lg-3" data-analytics-event="{"location":"navbar","action":"github_advanced_security","context":"product","tag":"link","label":"github_advanced_security_link_product_navbar"}" href="https://github.com/security/advanced-security"> <svg aria-hidden="true" height="24" viewBox="0 0 24 24" version="1.1" width="24" 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1.5h-.5a.75.75 0 0 1-.75-.75Z"></path> </svg> <div> <div class="color-fg-default h4">Codespaces</div> Instant dev environments </div> </a></li> <li> <a class="HeaderMenu-dropdown-link d-block no-underline position-relative py-2 Link--secondary d-flex flex-items-center Link--has-description pb-lg-3" data-analytics-event="{"location":"navbar","action":"issues","context":"product","tag":"link","label":"issues_link_product_navbar"}" href="https://github.com/features/issues"> <svg aria-hidden="true" height="24" viewBox="0 0 24 24" version="1.1" width="24" data-view-component="true" class="octicon octicon-issue-opened color-fg-subtle mr-3"> <path d="M12 1c6.075 0 11 4.925 11 11s-4.925 11-11 11S1 18.075 1 12 5.925 1 12 1ZM2.5 12a9.5 9.5 0 0 0 9.5 9.5 9.5 9.5 0 0 0 9.5-9.5A9.5 9.5 0 0 0 12 2.5 9.5 9.5 0 0 0 2.5 12Zm9.5 2a2 2 0 1 1-.001-3.999A2 2 0 0 1 12 14Z"></path> </svg> <div> <div class="color-fg-default h4">Issues</div> Plan and track work </div> </a></li> <li> <a 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width="24" data-view-component="true" class="octicon octicon-code-square color-fg-subtle mr-3"> <path d="M10.3 8.24a.75.75 0 0 1-.04 1.06L7.352 12l2.908 2.7a.75.75 0 1 1-1.02 1.1l-3.5-3.25a.75.75 0 0 1 0-1.1l3.5-3.25a.75.75 0 0 1 1.06.04Zm3.44 1.06a.75.75 0 1 1 1.02-1.1l3.5 3.25a.75.75 0 0 1 0 1.1l-3.5 3.25a.75.75 0 1 1-1.02-1.1l2.908-2.7-2.908-2.7Z"></path><path d="M2 3.75C2 2.784 2.784 2 3.75 2h16.5c.966 0 1.75.784 1.75 1.75v16.5A1.75 1.75 0 0 1 20.25 22H3.75A1.75 1.75 0 0 1 2 20.25Zm1.75-.25a.25.25 0 0 0-.25.25v16.5c0 .138.112.25.25.25h16.5a.25.25 0 0 0 .25-.25V3.75a.25.25 0 0 0-.25-.25Z"></path> </svg> <div> <div class="color-fg-default h4">Code Search</div> Find more, search less </div> </a></li> </ul> </div> </div> <div class="HeaderMenu-column px-lg-4"> <div class="border-bottom pb-3 pb-lg-0 border-lg-bottom-0 border-bottom-0"> <span class="d-block h4 color-fg-default my-1" id="product-explore-heading">Explore</span> <ul class="list-style-none f5" 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1-.427.177L13.03 4.03 9.28 7.78a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042l3.75-3.75-1.543-1.543A.25.25 0 0 1 10.604 1Z"></path> </svg> </a></li> </ul> </div> </div> </div> </li> <li class="HeaderMenu-item position-relative flex-wrap flex-justify-between flex-items-center d-block d-lg-flex flex-lg-nowrap flex-lg-items-center js-details-container js-header-menu-item"> <button type="button" class="HeaderMenu-link border-0 width-full width-lg-auto px-0 px-lg-2 py-lg-2 no-wrap d-flex flex-items-center flex-justify-between js-details-target" aria-expanded="false"> Solutions <svg opacity="0.5" aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-chevron-down HeaderMenu-icon ml-1"> <path d="M12.78 5.22a.749.749 0 0 1 0 1.06l-4.25 4.25a.749.749 0 0 1-1.06 0L3.22 6.28a.749.749 0 1 1 1.06-1.06L8 8.939l3.72-3.719a.749.749 0 0 1 1.06 0Z"></path> </svg> </button> <div class="HeaderMenu-dropdown dropdown-menu rounded 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compression ratio(up to 89%), blazing fast 3D model format\u003c/strong\u003e\u003c/h1\u003e\u003ca id=\"user-content-tmf---high-compression-ratioup-to-89-blazing-fast-3d-model-format\" class=\"anchor\" aria-label=\"Permalink: TMF - high compression ratio(up to 89%), blazing fast 3D model format\" href=\"#tmf---high-compression-ratioup-to-89-blazing-fast-3d-model-format\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch1 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eWhat is TMF?\u003c/h1\u003e\u003ca id=\"user-content-what-is-tmf\" class=\"anchor\" aria-label=\"Permalink: What is TMF?\" href=\"#what-is-tmf\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003e\u003ccode\u003etmf\u003c/code\u003e is a model format focused on:\u003c/p\u003e\n\u003col dir=\"auto\"\u003e\n\u003cli\u003ePreserving graphical fidelity\u003c/li\u003e\n\u003cli\u003eAchieving high compression ratio\u003c/li\u003e\n\u003cli\u003eBeing very fast\u003c/li\u003e\n\u003cli\u003eGiving a very friendly and explicit API, with high quality documentation.\u003c/li\u003e\n\u003c/ol\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch2 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eWhat is \u003ccode\u003etmf\u003c/code\u003e best at?\u003c/h2\u003e\u003ca id=\"user-content-what-is-tmf-best-at\" class=\"anchor\" aria-label=\"Permalink: What is tmf best at?\" href=\"#what-is-tmf-best-at\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003etmf works best when operating on moderately sized 3D models(\u0026lt;100 k triangles), with fairly consistent LOD.\u003c/p\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch1 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eHow good is TMF at achieving its goals?\u003c/h1\u003e\u003ca id=\"user-content-how-good-is-tmf-at-achieving-its-goals\" class=\"anchor\" aria-label=\"Permalink: How good is TMF at achieving its goals?\" href=\"#how-good-is-tmf-at-achieving-its-goals\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003col dir=\"auto\"\u003e\n\u003cli\u003eAs for the visual quality, one can easily \u003ca href=\"#Model-render-comparison\"\u003ejudge by themselves\u003c/a\u003e.\u003c/li\u003e\n\u003cli\u003eCompression ratio usually falls between 86-89%, depending on quality settings. On more strict settings(preserving exact order of all vertex data) \u003ccode\u003etmf\u003c/code\u003e has a compression ratio of around ~70%\u003c/li\u003e\n\u003cli\u003eDecode speeds are very high, in some cases outperforming readers of uncompressed formats by a factor of magnitude.\nFor example, decoding the blender test moneky(Suzanne, file in \u003ccode\u003etests\u003c/code\u003e directory) subdivided 2 times(15.7k triangles, 8.2k points) takes just \u003cstrong\u003e678.18 µs\u003c/strong\u003e(\u003cem\u003e0.67818 ms\u003c/em\u003e)! Thanks to built-in \u003ccode\u003etokio\u003c/code\u003e integration, decoding may be autmaticaly split between threads, taking decode speeds even further up. Decoding the mesh containing the bust of Nefertiti, a 3D model with around 2 milion triangles, takes \u003cstrong\u003e220-240 ms\u003c/strong\u003e on a single thread, and only \u003cstrong\u003e84 ms\u003c/strong\u003e on 8 threads, on a 8 logical core system(4 physical cores). This means that \u003ccode\u003etmf\u003c/code\u003e is very fast. Please, however, note that \u003ccode\u003etmf\u003c/code\u003e-s compression algorithm struggles with very large models, so models with millions of triangles receive far less benefits in terms of file size.\u003c/li\u003e\n\u003cli\u003eTMF API centres mostly around 2 types: \u003ccode\u003eTMFMesh\u003c/code\u003e representing a mesh and all operations that may be done with it, and \u003ccode\u003eTMFPrecisionInfo\u003c/code\u003e specifying quality settings. All of TMFs functions and types are well documented, very often with multiple examples, showing exactly how to use them, greatly improving the ease of use. All operations on a mesh are explicit.\u003c/li\u003e\n\u003c/ol\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch2 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eModel render comparison\u003c/h2\u003e\u003ca id=\"user-content-model-render-comparison\" class=\"anchor\" aria-label=\"Permalink: Model render comparison\" href=\"#model-render-comparison\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cmarkdown-accessiblity-table\u003e\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eUncompressed .obj\u003c/th\u003e\n\u003cth\u003eCompressed .tmf file(default settings, data reordering allowed)\u003c/th\u003e\n\u003c/tr\u003e\n\u003c/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca target=\"_blank\" rel=\"noopener noreferrer\" href=\"/FractalFir/tmf/blob/main/docs/original.png\"\u003e\u003cimg src=\"/FractalFir/tmf/raw/main/docs/original.png\" style=\"max-width: 100%;\"\u003e\u003c/a\u003e\u003c/td\u003e\n\u003ctd\u003e\u003ca target=\"_blank\" rel=\"noopener noreferrer\" href=\"/FractalFir/tmf/blob/main/docs/tmf.png\"\u003e\u003cimg src=\"/FractalFir/tmf/raw/main/docs/tmf.png\" style=\"max-width: 100%;\"\u003e\u003c/a\u003e\u003c/td\u003e\n\u003c/tr\u003e\n\u003c/tbody\u003e\n\u003c/table\u003e\u003c/markdown-accessiblity-table\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch1 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eIs tmf a right fit for your project?\u003c/h1\u003e\u003ca id=\"user-content-is-tmf-a-right-fit-for-your-project\" class=\"anchor\" aria-label=\"Permalink: Is tmf a right fit for your project?\" href=\"#is-tmf-a-right-fit-for-your-project\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch2 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eWhen it is not a right fit:\u003c/h2\u003e\u003ca id=\"user-content-when-it-is-not-a-right-fit\" class=\"anchor\" aria-label=\"Permalink: When it is not a right fit:\" href=\"#when-it-is-not-a-right-fit\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003col dir=\"auto\"\u003e\n\u003cli\u003eYou don't care about read speeds at all. Then just use Draco. It is way slower(In my tests around 10-20x), but it is also better at compressing.\u003c/li\u003e\n\u003cli\u003eYour meshes are \u003cstrong\u003every\u003c/strong\u003e big(millions of triangles). \u003ccode\u003etmf\u003c/code\u003e was optimised and tested with much more modest meshes(\u0026gt;150k triangles). It's compression becomes worse, the more triangles and points you have. It is very still fast, the compression is just not well suited for such tasks.\u003c/li\u003e\n\u003c/ol\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch2 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eWhen it is a right fit:\u003c/h2\u003e\u003ca id=\"user-content-when-it-is-a-right-fit\" class=\"anchor\" aria-label=\"Permalink: When it is a right fit:\" href=\"#when-it-is-a-right-fit\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003col dir=\"auto\"\u003e\n\u003cli\u003eYou need your models to be smaller, but don't want to sacrifice much of the read speed.\u003c/li\u003e\n\u003cli\u003eYour meshes are modestly sized or small (\u0026gt;150k triangles).\u003c/li\u003e\n\u003cli\u003eYou only need your meshes to look exacly the same, and are fine with some unnoticable changes.\u003c/li\u003e\n\u003c/ol\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch1 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eHow are high compression speeds achieved?\u003c/h1\u003e\u003ca id=\"user-content-how-are-high-compression-speeds-achieved\" class=\"anchor\" aria-label=\"Permalink: How are high compression speeds achieved?\" href=\"#how-are-high-compression-speeds-achieved\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003eCurrently on default settings TMF uses bit-wise operations(bit-shift and or) to read data, which makes it able to read data at very high speeds. Additionally TMF is thread safe, and has built-in, optional multi-threading, allowing for decoding of many parts of one model at the same time by many cores, increasing speed even further.\u003c/p\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch1 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eHow does it work?\u003c/h1\u003e\u003ca id=\"user-content-how-does-it-work\" class=\"anchor\" aria-label=\"Permalink: How does it work?\" href=\"#how-does-it-work\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003eWhile I mark tmf as a \"lossy compression format\" in a classical meaning of this word, it really does not \u003cem\u003ecompress\u003c/em\u003e anything (at least for now). The bulk of the space savings come from storing the model data in different data structures that better reflect the data they store, and saving data with exactly precision it needs(e.g. 9 or 23 bit data types).\u003c/p\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch1 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eComparisions\u003c/h1\u003e\u003ca id=\"user-content-comparisions\" class=\"anchor\" aria-label=\"Permalink: Comparisions\" href=\"#comparisions\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003eThe model used in test is the blender monkey(Suzzane). TMF files were saved with default settings(\u003ccode\u003eTMFPrecisionInfo::default()\u003c/code\u003e).\u003c/p\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch2 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eFile size comparison\u003c/h2\u003e\u003ca id=\"user-content-file-size-comparison\" class=\"anchor\" aria-label=\"Permalink: File size comparison\" href=\"#file-size-comparison\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cmarkdown-accessiblity-table\u003e\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eFormat\u003c/th\u003e\n\u003cth\u003eSize\u003c/th\u003e\n\u003c/tr\u003e\n\u003c/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e.obj\u003c/td\u003e\n\u003ctd\u003e1.3 MB\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ezip(deflate) compressed .obj\u003c/td\u003e\n\u003ctd\u003e367.7 kB\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e.fbx\u003c/td\u003e\n\u003ctd\u003e651.0 kB\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ezip(deflate) compressed .fbx\u003c/td\u003e\n\u003ctd\u003e600.6 kB\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e.gltf\u003c/td\u003e\n\u003ctd\u003e476.5 kB\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ezip(deflate) compressed .gltf\u003c/td\u003e\n\u003ctd\u003e302.1 kB\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e.glb\u003c/td\u003e\n\u003ctd\u003e356.6 kB\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ezip(deflate) compressed .glb\u003c/td\u003e\n\u003ctd\u003e267.5 kB\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e.tmf\u003c/td\u003e\n\u003ctd\u003e308.3 kB\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e.tmf with pre-encode optimisations applied\u003c/td\u003e\n\u003ctd\u003e\u003cstrong\u003e161.9 kB\u003c/strong\u003e\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e.tmf with pre-encode optimisations and hand-picked quality settings\u003c/td\u003e\n\u003ctd\u003e\u003cstrong\u003e142.4 kB\u003c/strong\u003e\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ezip(deflate) compressed .tmf\u003c/td\u003e\n\u003ctd\u003e307.9 kB\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ezip(deflate) compressed .tmf, with pre-encode optimizations\u003c/td\u003e\n\u003ctd\u003e160.2 kB\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ezip(deflate) compressed .tmf, with pre-encode optimizations, hand-picked quality settings\u003c/td\u003e\n\u003ctd\u003e141.0 kB\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003edraco on max compression settings\u003c/td\u003e\n\u003ctd\u003e~22 kB\u003c/td\u003e\n\u003c/tr\u003e\n\u003c/tbody\u003e\n\u003c/table\u003e\u003c/markdown-accessiblity-table\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch2 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eTMF vs. Draco.\u003c/h2\u003e\u003ca id=\"user-content-tmf-vs-draco\" class=\"anchor\" aria-label=\"Permalink: TMF vs. Draco.\" href=\"#tmf-vs-draco\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003eDraco is noticeably better at compression than TMF. If all you are looking for is reduced file size, then just use Draco. But if you are looking for both high compression and fast reads, tmf can be a vaible alternative.\u003c/p\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch3 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eA comparison of some pros and cons\u003c/h3\u003e\u003ca id=\"user-content-a-comparison-of-some-pros-and-cons\" class=\"anchor\" aria-label=\"Permalink: A comparison of some pros and cons\" href=\"#a-comparison-of-some-pros-and-cons\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003e\u003cem\u003eNOTE: when compression ratios/percentages are given, all formats(eg. tmf,draco,fbx) are compared to .obj as uncompressed base\u003c/em\u003e.\u003c/p\u003e\n\u003cmarkdown-accessiblity-table\u003e\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eCategory\u003c/th\u003e\n\u003cth\u003eDraco\u003c/th\u003e\n\u003cth\u003eTMF\u003c/th\u003e\n\u003c/tr\u003e\n\u003c/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompression Ratio\u003c/td\u003e\n\u003ctd\u003eDraco is generally better at compressing data, depending on the compression settings it can be between ~80-98%\u003c/td\u003e\n\u003ctd\u003eTMF can compress your file by around 87.3%\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e3D model(Suzanne) read time\u003c/td\u003e\n\u003ctd\u003e7-10 ms\u003c/td\u003e\n\u003ctd\u003e~0.6 ms\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eImpact of compression on read time\u003c/td\u003e\n\u003ctd\u003eRead time increases with compression level\u003c/td\u003e\n\u003ctd\u003eFor most settings read time \u003cstrong\u003edecreases\u003c/strong\u003e with compression level\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e3D model(Suzanne) write time\u003c/td\u003e\n\u003ctd\u003e10-18 ms\u003c/td\u003e\n\u003ctd\u003e~7 ms\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLanguage\u003c/td\u003e\n\u003ctd\u003eC++\u003c/td\u003e\n\u003ctd\u003eRust\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOfficial Rust support\u003c/td\u003e\n\u003ctd\u003eNone\u003c/td\u003e\n\u003ctd\u003eNative\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBuild Dependencies\u003c/td\u003e\n\u003ctd\u003eC++ compiler, cmake, make\u003c/td\u003e\n\u003ctd\u003eonly standard rust tollchain\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUsing in rust project\u003c/td\u003e\n\u003ctd\u003eRequires manual linking\u003c/td\u003e\n\u003ctd\u003einstalls and links automatically using cargo\u003c/td\u003e\n\u003c/tr\u003e\n\u003c/tbody\u003e\n\u003c/table\u003e\u003c/markdown-accessiblity-table\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch2 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eWhat can lead to compression of a particular mesh being less efficient?\u003c/h2\u003e\u003ca id=\"user-content-what-can-lead-to-compression-of-a-particular-mesh-being-less-efficient\" class=\"anchor\" aria-label=\"Permalink: What can lead to compression of a particular mesh being less efficient?\" href=\"#what-can-lead-to-compression-of-a-particular-mesh-being-less-efficient\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003eGreatly varying LOD: The save system dynamically adjusts to the LOD of the mesh. For example, a low-poly castle mesh may be saved with precision of 10 cm and a strawberry model may be saved with 1 mm precision. Saving those two object in one \u003cem\u003emesh\u003c/em\u003e(not file!) will force the castle mesh to be saved with higher precision, wasting space. Because most meshes will naturally have a consistent LOD, and meshes that don't would almost always lead to issues elsewhere, this problem is rarely encountered.\u003c/p\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch1 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eExamples\u003c/h1\u003e\u003ca id=\"user-content-examples\" class=\"anchor\" aria-label=\"Permalink: Examples\" href=\"#examples\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch2 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eMesh loading\u003c/h2\u003e\u003ca id=\"user-content-mesh-loading\" class=\"anchor\" aria-label=\"Permalink: Mesh loading\" href=\"#mesh-loading\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003eLoading one mesh\u003c/p\u003e\n\u003cdiv class=\"highlight highlight-source-rust notranslate position-relative overflow-auto\" dir=\"auto\" data-snippet-clipboard-copy-content=\"use tmf::TMFMesh;\nuse std::fs::File;\nlet input = File::open(\u0026quot;suzanne.tmf\u0026quot;).expect(\u0026quot;Could not open .tmf file!\u0026quot;);\nlet (mesh,name) = TMFMesh::read_tmf_one(\u0026amp;mut input).expect(\u0026quot;Could not read TMF file!\u0026quot;);\n// Geting mesh data\nlet vertices = mesh.get_vertices().expect(\u0026quot;No vertices!\u0026quot;);\nlet vertex_triangles = mesh.get_vertex_triangles().expect(\u0026quot;No vertiex triangle array!\u0026quot;);\nlet normals = mesh.get_normals().expect(\u0026quot;No normals!\u0026quot;);\nlet normal_triangles = mesh.get_normal_triangles().expect(\u0026quot;No normal triangle array!\u0026quot;);\nlet uvs = mesh.get_uvs().expect(\u0026quot;No uvs!\u0026quot;);\nlet uv_triangles = mesh.get_uv_triangles().expect(\u0026quot;No uv triangle array!\u0026quot;);\n// Can provide arrays laid out like OpenGL buffers for ease of use when developing games!\nlet buff_vert_array = mesh.get_vertex_buffer();\nlet buff_norm_array = mesh.get_normal_buffer();\nlet buff_uv_array = mesh.get_uv_buffer();\"\u003e\u003cpre\u003e\u003cspan class=\"pl-k\"\u003euse\u003c/span\u003e tmf\u003cspan class=\"pl-kos\"\u003e::\u003c/span\u003e\u003cspan class=\"pl-v\"\u003eTMFMesh\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e;\u003c/span\u003e\n\u003cspan class=\"pl-k\"\u003euse\u003c/span\u003e std\u003cspan class=\"pl-kos\"\u003e::\u003c/span\u003efs\u003cspan class=\"pl-kos\"\u003e::\u003c/span\u003e\u003cspan class=\"pl-v\"\u003eFile\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e;\u003c/span\u003e\n\u003cspan class=\"pl-k\"\u003elet\u003c/span\u003e input = \u003cspan class=\"pl-smi\"\u003eFile\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e::\u003c/span\u003e\u003cspan class=\"pl-en\"\u003eopen\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-s\"\u003e\"suzanne.tmf\"\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e.\u003c/span\u003e\u003cspan class=\"pl-en\"\u003eexpect\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-s\"\u003e\"Could not open .tmf file!\"\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e;\u003c/span\u003e\n\u003cspan class=\"pl-k\"\u003elet\u003c/span\u003e \u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003emesh\u003cspan class=\"pl-kos\"\u003e,\u003c/span\u003ename\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e = \u003cspan class=\"pl-smi\"\u003eTMFMesh\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e::\u003c/span\u003e\u003cspan class=\"pl-en\"\u003eread_tmf_one\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-c1\"\u003e\u0026amp;\u003c/span\u003e\u003cspan class=\"pl-k\"\u003emut\u003c/span\u003e input\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e.\u003c/span\u003e\u003cspan class=\"pl-en\"\u003eexpect\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-s\"\u003e\"Could not read TMF file!\"\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e;\u003c/span\u003e\n\u003cspan class=\"pl-c\"\u003e// Geting mesh data\u003c/span\u003e\n\u003cspan class=\"pl-k\"\u003elet\u003c/span\u003e vertices = mesh\u003cspan class=\"pl-kos\"\u003e.\u003c/span\u003e\u003cspan class=\"pl-en\"\u003eget_vertices\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e.\u003c/span\u003e\u003cspan class=\"pl-en\"\u003eexpect\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-s\"\u003e\"No vertices!\"\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e;\u003c/span\u003e\n\u003cspan class=\"pl-k\"\u003elet\u003c/span\u003e vertex_triangles = mesh\u003cspan class=\"pl-kos\"\u003e.\u003c/span\u003e\u003cspan class=\"pl-en\"\u003eget_vertex_triangles\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e.\u003c/span\u003e\u003cspan class=\"pl-en\"\u003eexpect\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-s\"\u003e\"No vertiex triangle array!\"\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e;\u003c/span\u003e\n\u003cspan class=\"pl-k\"\u003elet\u003c/span\u003e normals = mesh\u003cspan class=\"pl-kos\"\u003e.\u003c/span\u003e\u003cspan class=\"pl-en\"\u003eget_normals\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e.\u003c/span\u003e\u003cspan class=\"pl-en\"\u003eexpect\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-s\"\u003e\"No normals!\"\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e;\u003c/span\u003e\n\u003cspan class=\"pl-k\"\u003elet\u003c/span\u003e normal_triangles = mesh\u003cspan class=\"pl-kos\"\u003e.\u003c/span\u003e\u003cspan class=\"pl-en\"\u003eget_normal_triangles\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e.\u003c/span\u003e\u003cspan class=\"pl-en\"\u003eexpect\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-s\"\u003e\"No normal triangle array!\"\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e;\u003c/span\u003e\n\u003cspan class=\"pl-k\"\u003elet\u003c/span\u003e uvs = mesh\u003cspan class=\"pl-kos\"\u003e.\u003c/span\u003e\u003cspan class=\"pl-en\"\u003eget_uvs\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e.\u003c/span\u003e\u003cspan class=\"pl-en\"\u003eexpect\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-s\"\u003e\"No uvs!\"\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e;\u003c/span\u003e\n\u003cspan class=\"pl-k\"\u003elet\u003c/span\u003e uv_triangles = mesh\u003cspan class=\"pl-kos\"\u003e.\u003c/span\u003e\u003cspan class=\"pl-en\"\u003eget_uv_triangles\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e.\u003c/span\u003e\u003cspan class=\"pl-en\"\u003eexpect\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-s\"\u003e\"No uv triangle array!\"\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e;\u003c/span\u003e\n\u003cspan class=\"pl-c\"\u003e// Can provide arrays laid out like OpenGL buffers for ease of use when developing games!\u003c/span\u003e\n\u003cspan class=\"pl-k\"\u003elet\u003c/span\u003e buff_vert_array = mesh\u003cspan class=\"pl-kos\"\u003e.\u003c/span\u003e\u003cspan class=\"pl-en\"\u003eget_vertex_buffer\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e;\u003c/span\u003e\n\u003cspan class=\"pl-k\"\u003elet\u003c/span\u003e buff_norm_array = mesh\u003cspan class=\"pl-kos\"\u003e.\u003c/span\u003e\u003cspan class=\"pl-en\"\u003eget_normal_buffer\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e;\u003c/span\u003e\n\u003cspan class=\"pl-k\"\u003elet\u003c/span\u003e buff_uv_array = mesh\u003cspan class=\"pl-kos\"\u003e.\u003c/span\u003e\u003cspan class=\"pl-en\"\u003eget_uv_buffer\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e;\u003c/span\u003e\u003c/pre\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003eLoading multiple meshes\u003c/p\u003e\n\u003cdiv class=\"highlight highlight-source-rust notranslate position-relative overflow-auto\" dir=\"auto\" data-snippet-clipboard-copy-content=\"use tmf::TMFMesh;\nuse std::fs::File;\nlet input = File::open(\u0026quot;suzanne.tmf\u0026quot;).expect(\u0026quot;Could not open .tmf file!\u0026quot;);\nlet meshes = TMFMesh::read_tmf_one(\u0026amp;mut input).expect(\u0026quot;Could not open TMF file!\u0026quot;);\nfor (mesh,name) in meshes{\n do_something(mesh,name);\n}\"\u003e\u003cpre\u003e\u003cspan class=\"pl-k\"\u003euse\u003c/span\u003e tmf\u003cspan class=\"pl-kos\"\u003e::\u003c/span\u003e\u003cspan class=\"pl-v\"\u003eTMFMesh\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e;\u003c/span\u003e\n\u003cspan class=\"pl-k\"\u003euse\u003c/span\u003e std\u003cspan class=\"pl-kos\"\u003e::\u003c/span\u003efs\u003cspan class=\"pl-kos\"\u003e::\u003c/span\u003e\u003cspan class=\"pl-v\"\u003eFile\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e;\u003c/span\u003e\n\u003cspan class=\"pl-k\"\u003elet\u003c/span\u003e input = \u003cspan class=\"pl-smi\"\u003eFile\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e::\u003c/span\u003e\u003cspan class=\"pl-en\"\u003eopen\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-s\"\u003e\"suzanne.tmf\"\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e.\u003c/span\u003e\u003cspan class=\"pl-en\"\u003eexpect\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-s\"\u003e\"Could not open .tmf file!\"\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e;\u003c/span\u003e\n\u003cspan class=\"pl-k\"\u003elet\u003c/span\u003e meshes = \u003cspan class=\"pl-smi\"\u003eTMFMesh\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e::\u003c/span\u003e\u003cspan class=\"pl-en\"\u003eread_tmf_one\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-c1\"\u003e\u0026amp;\u003c/span\u003e\u003cspan class=\"pl-k\"\u003emut\u003c/span\u003e input\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e.\u003c/span\u003e\u003cspan class=\"pl-en\"\u003eexpect\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-s\"\u003e\"Could not open TMF file!\"\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e;\u003c/span\u003e\n\u003cspan class=\"pl-k\"\u003efor\u003c/span\u003e \u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003emesh\u003cspan class=\"pl-kos\"\u003e,\u003c/span\u003ename\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e \u003cspan class=\"pl-k\"\u003ein\u003c/span\u003e meshes\u003cspan class=\"pl-kos\"\u003e{\u003c/span\u003e\n \u003cspan class=\"pl-en\"\u003edo_something\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003emesh\u003cspan class=\"pl-kos\"\u003e,\u003c/span\u003ename\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e;\u003c/span\u003e\n\u003cspan class=\"pl-kos\"\u003e}\u003c/span\u003e\u003c/pre\u003e\u003c/div\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch2 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eMesh Saving\u003c/h2\u003e\u003ca id=\"user-content-mesh-saving\" class=\"anchor\" aria-label=\"Permalink: Mesh Saving\" href=\"#mesh-saving\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003eSaving one mesh\u003c/p\u003e\n\u003cdiv class=\"highlight highlight-source-rust notranslate position-relative overflow-auto\" dir=\"auto\" data-snippet-clipboard-copy-content=\"use tmf::TMFMesh;\nuse std::fs::File;\nlet output = File::create(\u0026quot;suzanne.tmf\u0026quot;).expect(\u0026quot;Could not create output file!\u0026quot;);\nlet settings = TMFPrecisionInfo::default();\n\n// Change TMF mesh to have better laid out data. This can save significant ammounts of space.\nmesh.unify_index_data();\n\nmesh.write_tmf_one(\u0026amp;mut output,\u0026amp;settings,name).expect(\u0026quot;Could not save TMF mesh!\u0026quot;);\"\u003e\u003cpre\u003e\u003cspan class=\"pl-k\"\u003euse\u003c/span\u003e tmf\u003cspan class=\"pl-kos\"\u003e::\u003c/span\u003e\u003cspan class=\"pl-v\"\u003eTMFMesh\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e;\u003c/span\u003e\n\u003cspan class=\"pl-k\"\u003euse\u003c/span\u003e std\u003cspan class=\"pl-kos\"\u003e::\u003c/span\u003efs\u003cspan class=\"pl-kos\"\u003e::\u003c/span\u003e\u003cspan class=\"pl-v\"\u003eFile\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e;\u003c/span\u003e\n\u003cspan class=\"pl-k\"\u003elet\u003c/span\u003e output = \u003cspan class=\"pl-smi\"\u003eFile\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e::\u003c/span\u003e\u003cspan class=\"pl-en\"\u003ecreate\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-s\"\u003e\"suzanne.tmf\"\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e.\u003c/span\u003e\u003cspan class=\"pl-en\"\u003eexpect\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-s\"\u003e\"Could not create output file!\"\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e;\u003c/span\u003e\n\u003cspan class=\"pl-k\"\u003elet\u003c/span\u003e settings = \u003cspan class=\"pl-smi\"\u003eTMFPrecisionInfo\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e::\u003c/span\u003e\u003cspan class=\"pl-en\"\u003edefault\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e;\u003c/span\u003e\n\n\u003cspan class=\"pl-c\"\u003e// Change TMF mesh to have better laid out data. This can save significant ammounts of space.\u003c/span\u003e\nmesh\u003cspan class=\"pl-kos\"\u003e.\u003c/span\u003e\u003cspan class=\"pl-en\"\u003eunify_index_data\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e;\u003c/span\u003e\n\nmesh\u003cspan class=\"pl-kos\"\u003e.\u003c/span\u003e\u003cspan class=\"pl-en\"\u003ewrite_tmf_one\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-c1\"\u003e\u0026amp;\u003c/span\u003e\u003cspan class=\"pl-k\"\u003emut\u003c/span\u003e output\u003cspan class=\"pl-kos\"\u003e,\u003c/span\u003e\u003cspan class=\"pl-c1\"\u003e\u0026amp;\u003c/span\u003esettings\u003cspan class=\"pl-kos\"\u003e,\u003c/span\u003ename\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e.\u003c/span\u003e\u003cspan class=\"pl-en\"\u003eexpect\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-s\"\u003e\"Could not save TMF mesh!\"\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e;\u003c/span\u003e\u003c/pre\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003eSaving multiple meshes\u003c/p\u003e\n\u003cdiv class=\"highlight highlight-source-rust notranslate position-relative overflow-auto\" dir=\"auto\" data-snippet-clipboard-copy-content=\"use tmf::TMFMesh;\nuse std::fs::File;\nlet output = File::open(\u0026quot;suzanne.tmf\u0026quot;).expect(\u0026quot;Could not create .tmf file!\u0026quot;);\nTMFMesh::write_tmf(meshes,\u0026amp;mut input,\u0026amp;settings).expect(\u0026quot;Could not write TMF mesh!\u0026quot;);\"\u003e\u003cpre\u003e\u003cspan class=\"pl-k\"\u003euse\u003c/span\u003e tmf\u003cspan class=\"pl-kos\"\u003e::\u003c/span\u003e\u003cspan class=\"pl-v\"\u003eTMFMesh\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e;\u003c/span\u003e\n\u003cspan class=\"pl-k\"\u003euse\u003c/span\u003e std\u003cspan class=\"pl-kos\"\u003e::\u003c/span\u003efs\u003cspan class=\"pl-kos\"\u003e::\u003c/span\u003e\u003cspan class=\"pl-v\"\u003eFile\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e;\u003c/span\u003e\n\u003cspan class=\"pl-k\"\u003elet\u003c/span\u003e output = \u003cspan class=\"pl-smi\"\u003eFile\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e::\u003c/span\u003e\u003cspan class=\"pl-en\"\u003eopen\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-s\"\u003e\"suzanne.tmf\"\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e.\u003c/span\u003e\u003cspan class=\"pl-en\"\u003eexpect\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-s\"\u003e\"Could not create .tmf file!\"\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e;\u003c/span\u003e\n\u003cspan class=\"pl-smi\"\u003eTMFMesh\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e::\u003c/span\u003e\u003cspan class=\"pl-en\"\u003ewrite_tmf\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003emeshes\u003cspan class=\"pl-kos\"\u003e,\u003c/span\u003e\u003cspan class=\"pl-c1\"\u003e\u0026amp;\u003c/span\u003e\u003cspan class=\"pl-k\"\u003emut\u003c/span\u003e input\u003cspan class=\"pl-kos\"\u003e,\u003c/span\u003e\u003cspan class=\"pl-c1\"\u003e\u0026amp;\u003c/span\u003esettings\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e.\u003c/span\u003e\u003cspan class=\"pl-en\"\u003eexpect\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e(\u003c/span\u003e\u003cspan class=\"pl-s\"\u003e\"Could not write TMF mesh!\"\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e)\u003c/span\u003e\u003cspan class=\"pl-kos\"\u003e;\u003c/span\u003e\u003c/pre\u003e\u003c/div\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch1 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eFeatures\u003c/h1\u003e\u003ca id=\"user-content-features\" class=\"anchor\" aria-label=\"Permalink: Features\" href=\"#features\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch1 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003e0.1 (Current version)\u003c/h1\u003e\u003ca id=\"user-content-01-current-version\" class=\"anchor\" aria-label=\"Permalink: 0.1 (Current version)\" href=\"#01-current-version\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cul class=\"contains-task-list\"\u003e\n\u003cli class=\"task-list-item\"\u003e\u003cinput type=\"checkbox\" id=\"\" disabled=\"\" class=\"task-list-item-checkbox\" checked=\"\"\u003e Exporting .obj\u003c/li\u003e\n\u003cli class=\"task-list-item\"\u003e\u003cinput type=\"checkbox\" id=\"\" disabled=\"\" class=\"task-list-item-checkbox\" checked=\"\"\u003e Importing .obj\u003c/li\u003e\n\u003cli class=\"task-list-item\"\u003e\u003cinput type=\"checkbox\" id=\"\" disabled=\"\" class=\"task-list-item-checkbox\" checked=\"\"\u003e Importing not-triangulated .obj models - \u003cstrong\u003eexperimental\u003c/strong\u003e, supports only convex polygons\u003c/li\u003e\n\u003cli class=\"task-list-item\"\u003e\u003cinput type=\"checkbox\" id=\"\" disabled=\"\" class=\"task-list-item-checkbox\" checked=\"\"\u003e Writing/Reading .tmf files\u003c/li\u003e\n\u003cli class=\"task-list-item\"\u003e\u003cinput type=\"checkbox\" id=\"\" disabled=\"\" class=\"task-list-item-checkbox\" checked=\"\"\u003e Point Positions\u003c/li\u003e\n\u003cli class=\"task-list-item\"\u003e\u003cinput type=\"checkbox\" id=\"\" disabled=\"\" class=\"task-list-item-checkbox\" checked=\"\"\u003e Point Normals\u003c/li\u003e\n\u003cli class=\"task-list-item\"\u003e\u003cinput type=\"checkbox\" id=\"\" disabled=\"\" class=\"task-list-item-checkbox\" checked=\"\"\u003e Point Uv coordinates\u003c/li\u003e\n\u003cli class=\"task-list-item\"\u003e\u003cinput type=\"checkbox\" id=\"\" disabled=\"\" class=\"task-list-item-checkbox\" checked=\"\"\u003e Mesh triangles\u003c/li\u003e\n\u003cli class=\"task-list-item\"\u003e\u003cinput type=\"checkbox\" id=\"\" disabled=\"\" class=\"task-list-item-checkbox\" checked=\"\"\u003e Point clouds\u003c/li\u003e\n\u003cli class=\"task-list-item\"\u003e\u003cinput type=\"checkbox\" id=\"\" disabled=\"\" class=\"task-list-item-checkbox\" checked=\"\"\u003e Multiple meshes in one file\u003c/li\u003e\n\u003cli class=\"task-list-item\"\u003e\u003cinput type=\"checkbox\" id=\"\" disabled=\"\" class=\"task-list-item-checkbox\" checked=\"\"\u003e Fully customizable save precision settings\u003c/li\u003e\n\u003cli class=\"task-list-item\"\u003e\u003cinput type=\"checkbox\" id=\"\" disabled=\"\" class=\"task-list-item-checkbox\" checked=\"\"\u003e Full documentation\u003c/li\u003e\n\u003cli class=\"task-list-item\"\u003e\u003cinput type=\"checkbox\" id=\"\" disabled=\"\" class=\"task-list-item-checkbox\" checked=\"\"\u003e Examples for each function in the crate\u003c/li\u003e\n\u003cli class=\"task-list-item\"\u003e\u003cinput type=\"checkbox\" id=\"\" disabled=\"\" class=\"task-list-item-checkbox\" checked=\"\"\u003e Tangent data\u003c/li\u003e\n\u003cli class=\"task-list-item\"\u003e\u003cinput type=\"checkbox\" id=\"\" disabled=\"\" class=\"task-list-item-checkbox\" checked=\"\"\u003e Custom mesh data\u003c/li\u003e\n\u003cli class=\"task-list-item\"\u003e\u003cinput type=\"checkbox\" id=\"\" disabled=\"\" class=\"task-list-item-checkbox\" checked=\"\"\u003e Support for RGBA vertex colors(grayscale support using a float attribute), and float/integer vertex attributes.\u003c/li\u003e\n\u003c/ul\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch1 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003ePlaned Features\u003c/h1\u003e\u003ca id=\"user-content-planed-features\" class=\"anchor\" aria-label=\"Permalink: Planed Features\" href=\"#planed-features\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cul class=\"contains-task-list\"\u003e\n\u003cli class=\"task-list-item\"\u003e\u003cinput type=\"checkbox\" id=\"\" disabled=\"\" class=\"task-list-item-checkbox\"\u003e Vertex groups\u003c/li\u003e\n\u003cli class=\"task-list-item\"\u003e\u003cinput type=\"checkbox\" id=\"\" disabled=\"\" class=\"task-list-item-checkbox\"\u003e Materials \u003cem\u003esome initial work already done\u003c/em\u003e\u003c/li\u003e\n\u003c/ul\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch1 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eMore in-depth explanation of compression\u003c/h1\u003e\u003ca id=\"user-content-more-in-depth-explanation-of-compression\" class=\"anchor\" aria-label=\"Permalink: More in-depth explanation of compression\" href=\"#more-in-depth-explanation-of-compression\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch2 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eMath-based savings\u003c/h2\u003e\u003ca id=\"user-content-math-based-savings\" class=\"anchor\" aria-label=\"Permalink: Math-based savings\" href=\"#math-based-savings\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003eMany formats used for saving of 3D models are shockingly wasteful. There are \u003cem\u003ea lot\u003c/em\u003e of opportunities to reduce file size, even when using lossless compression. For example, many model formats treat surface normal vectors like any other vectors. But they \u003cem\u003earen't\u003c/em\u003e like other vectors! They have some special properties, which can be exploited to save them more efficiently. Namely:\u003c/p\u003e\n\u003col dir=\"auto\"\u003e\n\u003cli\u003eAll components in a normal vector fall into range \u0026lt;-1,1\u0026gt;. This means that values such as 1.3, 123.0, 69.323, or even 6.50e+12 can \u003cstrong\u003enever\u003c/strong\u003e occur in a normal vector, so saving them using a format which supports those values is wasteful.\u003c/li\u003e\n\u003cli\u003eAll normal vectors fulfil conditions x^2 + y^2 + z^2 = 1. This means, that there are a \u003cem\u003elot\u003c/em\u003e of vectors that have all their components in range \u0026lt;-1,1\u0026gt; but aren't valid surface normals. If saving those invalid values is supported, this means that there is wasted space.\nSo, by taking into consideration those properties of normals, they can be saved in such a way that each combination of saved bits correspond to a different normal, wasting no space!\u003c/li\u003e\n\u003c/ol\u003e\n\u003cp dir=\"auto\"\u003eAn analogical approach is taken for each and every element of model data, reducing the size even further.\u003c/p\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch2 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eBits vs Bytes based savings.\u003c/h2\u003e\u003ca id=\"user-content-bits-vs-bytes-based-savings\" class=\"anchor\" aria-label=\"Permalink: Bits vs Bytes based savings.\" href=\"#bits-vs-bytes-based-savings\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003eA disadvantage of using byte-aligned data types is lack of granularity of precision when saving data. A good example of this may be a UV coordinate that should represent a point on a 1024 pixel texture, with precision of .25 pixels. Doing some quick back of the napkin maths, it can be determined that a precision of log2(1024/.25) = log2(4096) = 12 bits is required. But only available data types are either too small (u8) or way too big(u16, 25% of disk space would go to waste!). The solution is forgoing byte alignment. It comes with a slight performance penalty of having to do bit shifts, and inability to use pre-built compression algorithms (they assume byte-alignment), but come with huge advantage of using data types just wide enough to save what is needed and not any wider.\nData is laid out like that in what I call an UBA (Unaligned Binary Array). Data in an UBA consists of a series of data with any binary size, where consecutive data may cross byte boundaries, start or end at any point in a byte, and there is no padding. The size of elements is usually specified before the UBA itself. For some widths, like 9 bits, savings coming from using UBA's can reach as much as 44%!\u003c/p\u003e\n\u003c/article\u003e","loaded":true,"timedOut":false,"errorMessage":null,"headerInfo":{"toc":[{"level":1,"text":"TMF - high compression ratio(up to 89%), blazing fast 3D model format","anchor":"tmf---high-compression-ratioup-to-89-blazing-fast-3d-model-format","htmlText":"TMF - high compression ratio(up to 89%), blazing fast 3D model format"},{"level":1,"text":"What is TMF?","anchor":"what-is-tmf","htmlText":"What is TMF?"},{"level":2,"text":"What is tmf best at?","anchor":"what-is-tmf-best-at","htmlText":"What is tmf best at?"},{"level":1,"text":"How good is TMF at achieving its goals?","anchor":"how-good-is-tmf-at-achieving-its-goals","htmlText":"How good is TMF at achieving its goals?"},{"level":2,"text":"Model render comparison","anchor":"model-render-comparison","htmlText":"Model render comparison"},{"level":1,"text":"Is tmf a right fit for your project?","anchor":"is-tmf-a-right-fit-for-your-project","htmlText":"Is tmf a right fit for your project?"},{"level":2,"text":"When it is not a right fit:","anchor":"when-it-is-not-a-right-fit","htmlText":"When it is not a right fit:"},{"level":2,"text":"When it is a right fit:","anchor":"when-it-is-a-right-fit","htmlText":"When it is a right fit:"},{"level":1,"text":"How are high compression speeds achieved?","anchor":"how-are-high-compression-speeds-achieved","htmlText":"How are high compression speeds achieved?"},{"level":1,"text":"How does it work?","anchor":"how-does-it-work","htmlText":"How does it work?"},{"level":1,"text":"Comparisions","anchor":"comparisions","htmlText":"Comparisions"},{"level":2,"text":"File size comparison","anchor":"file-size-comparison","htmlText":"File size comparison"},{"level":2,"text":"TMF vs. Draco.","anchor":"tmf-vs-draco","htmlText":"TMF vs. Draco."},{"level":3,"text":"A comparison of some pros and cons","anchor":"a-comparison-of-some-pros-and-cons","htmlText":"A comparison of some pros and cons"},{"level":2,"text":"What can lead to compression of a particular mesh being less efficient?","anchor":"what-can-lead-to-compression-of-a-particular-mesh-being-less-efficient","htmlText":"What can lead to compression of a particular mesh being less efficient?"},{"level":1,"text":"Examples","anchor":"examples","htmlText":"Examples"},{"level":2,"text":"Mesh loading","anchor":"mesh-loading","htmlText":"Mesh loading"},{"level":2,"text":"Mesh Saving","anchor":"mesh-saving","htmlText":"Mesh Saving"},{"level":1,"text":"Features","anchor":"features","htmlText":"Features"},{"level":1,"text":"0.1 (Current version)","anchor":"01-current-version","htmlText":"0.1 (Current version)"},{"level":1,"text":"Planed Features","anchor":"planed-features","htmlText":"Planed Features"},{"level":1,"text":"More in-depth explanation of compression","anchor":"more-in-depth-explanation-of-compression","htmlText":"More in-depth explanation of compression"},{"level":2,"text":"Math-based savings","anchor":"math-based-savings","htmlText":"Math-based savings"},{"level":2,"text":"Bits vs Bytes based savings.","anchor":"bits-vs-bytes-based-savings","htmlText":"Bits vs Bytes based savings."}],"siteNavLoginPath":"/login?return_to=https%3A%2F%2Fgithub.com%2FFractalFir%2Ftmf"}},{"displayName":"CODE_OF_CONDUCT.md","repoName":"tmf","refName":"main","path":"CODE_OF_CONDUCT.md","preferredFileType":"code_of_conduct","tabName":"Code of 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0 1.5h-8.5a.75.75 0 0 1 0-1.5ZM2 14a1 1 0 1 1 0-2 1 1 0 0 1 0 2Zm1-6a1 1 0 1 1-2 0 1 1 0 0 1 2 0ZM2 4a1 1 0 1 1 0-2 1 1 0 0 1 0 2Z"></path></svg></button></div><div class="Box-sc-g0xbh4-0 QkQOb js-snippet-clipboard-copy-unpositioned undefined" data-hpc="true"><article class="markdown-body entry-content container-lg" itemprop="text"><div class="markdown-heading" dir="auto"><h1 tabindex="-1" class="heading-element" dir="auto"><strong>TMF - high compression ratio(up to 89%), blazing fast 3D model format</strong></h1><a id="user-content-tmf---high-compression-ratioup-to-89-blazing-fast-3d-model-format" class="anchor" aria-label="Permalink: TMF - high compression ratio(up to 89%), blazing fast 3D model format" href="#tmf---high-compression-ratioup-to-89-blazing-fast-3d-model-format"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <div class="markdown-heading" dir="auto"><h1 tabindex="-1" class="heading-element" dir="auto">What is TMF?</h1><a id="user-content-what-is-tmf" class="anchor" aria-label="Permalink: What is TMF?" href="#what-is-tmf"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <p dir="auto"><code>tmf</code> is a model format focused on:</p> <ol dir="auto"> <li>Preserving graphical fidelity</li> <li>Achieving high compression ratio</li> <li>Being very fast</li> <li>Giving a very friendly and explicit API, with high quality documentation.</li> </ol> <div class="markdown-heading" dir="auto"><h2 tabindex="-1" class="heading-element" dir="auto">What is <code>tmf</code> best at?</h2><a id="user-content-what-is-tmf-best-at" class="anchor" aria-label="Permalink: What is tmf best at?" href="#what-is-tmf-best-at"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <p dir="auto">tmf works best when operating on moderately sized 3D models(<100 k triangles), with fairly consistent LOD.</p> <div class="markdown-heading" dir="auto"><h1 tabindex="-1" class="heading-element" dir="auto">How good is TMF at achieving its goals?</h1><a id="user-content-how-good-is-tmf-at-achieving-its-goals" class="anchor" aria-label="Permalink: How good is TMF at achieving its goals?" href="#how-good-is-tmf-at-achieving-its-goals"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <ol dir="auto"> <li>As for the visual quality, one can easily <a href="#Model-render-comparison">judge by themselves</a>.</li> <li>Compression ratio usually falls between 86-89%, depending on quality settings. On more strict settings(preserving exact order of all vertex data) <code>tmf</code> has a compression ratio of around ~70%</li> <li>Decode speeds are very high, in some cases outperforming readers of uncompressed formats by a factor of magnitude. For example, decoding the blender test moneky(Suzanne, file in <code>tests</code> directory) subdivided 2 times(15.7k triangles, 8.2k points) takes just <strong>678.18 µs</strong>(<em>0.67818 ms</em>)! Thanks to built-in <code>tokio</code> integration, decoding may be autmaticaly split between threads, taking decode speeds even further up. Decoding the mesh containing the bust of Nefertiti, a 3D model with around 2 milion triangles, takes <strong>220-240 ms</strong> on a single thread, and only <strong>84 ms</strong> on 8 threads, on a 8 logical core system(4 physical cores). This means that <code>tmf</code> is very fast. Please, however, note that <code>tmf</code>-s compression algorithm struggles with very large models, so models with millions of triangles receive far less benefits in terms of file size.</li> <li>TMF API centres mostly around 2 types: <code>TMFMesh</code> representing a mesh and all operations that may be done with it, and <code>TMFPrecisionInfo</code> specifying quality settings. All of TMFs functions and types are well documented, very often with multiple examples, showing exactly how to use them, greatly improving the ease of use. All operations on a mesh are explicit.</li> </ol> <div class="markdown-heading" dir="auto"><h2 tabindex="-1" class="heading-element" dir="auto">Model render comparison</h2><a id="user-content-model-render-comparison" class="anchor" aria-label="Permalink: Model render comparison" href="#model-render-comparison"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <markdown-accessiblity-table><table> <thead> <tr> <th>Uncompressed .obj</th> <th>Compressed .tmf file(default settings, data reordering allowed)</th> </tr> </thead> <tbody> <tr> <td><a target="_blank" rel="noopener noreferrer" href="/FractalFir/tmf/blob/main/docs/original.png"><img src="/FractalFir/tmf/raw/main/docs/original.png" style="max-width: 100%;"></a></td> <td><a target="_blank" rel="noopener noreferrer" href="/FractalFir/tmf/blob/main/docs/tmf.png"><img src="/FractalFir/tmf/raw/main/docs/tmf.png" style="max-width: 100%;"></a></td> </tr> </tbody> </table></markdown-accessiblity-table> <div class="markdown-heading" dir="auto"><h1 tabindex="-1" class="heading-element" dir="auto">Is tmf a right fit for your project?</h1><a id="user-content-is-tmf-a-right-fit-for-your-project" class="anchor" aria-label="Permalink: Is tmf a right fit for your project?" href="#is-tmf-a-right-fit-for-your-project"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <div class="markdown-heading" dir="auto"><h2 tabindex="-1" class="heading-element" dir="auto">When it is not a right fit:</h2><a id="user-content-when-it-is-not-a-right-fit" class="anchor" aria-label="Permalink: When it is not a right fit:" href="#when-it-is-not-a-right-fit"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <ol dir="auto"> <li>You don't care about read speeds at all. Then just use Draco. It is way slower(In my tests around 10-20x), but it is also better at compressing.</li> <li>Your meshes are <strong>very</strong> big(millions of triangles). <code>tmf</code> was optimised and tested with much more modest meshes(>150k triangles). It's compression becomes worse, the more triangles and points you have. It is very still fast, the compression is just not well suited for such tasks.</li> </ol> <div class="markdown-heading" dir="auto"><h2 tabindex="-1" class="heading-element" dir="auto">When it is a right fit:</h2><a id="user-content-when-it-is-a-right-fit" class="anchor" aria-label="Permalink: When it is a right fit:" href="#when-it-is-a-right-fit"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <ol dir="auto"> <li>You need your models to be smaller, but don't want to sacrifice much of the read speed.</li> <li>Your meshes are modestly sized or small (>150k triangles).</li> <li>You only need your meshes to look exacly the same, and are fine with some unnoticable changes.</li> </ol> <div class="markdown-heading" dir="auto"><h1 tabindex="-1" class="heading-element" dir="auto">How are high compression speeds achieved?</h1><a id="user-content-how-are-high-compression-speeds-achieved" class="anchor" aria-label="Permalink: How are high compression speeds achieved?" href="#how-are-high-compression-speeds-achieved"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <p dir="auto">Currently on default settings TMF uses bit-wise operations(bit-shift and or) to read data, which makes it able to read data at very high speeds. Additionally TMF is thread safe, and has built-in, optional multi-threading, allowing for decoding of many parts of one model at the same time by many cores, increasing speed even further.</p> <div class="markdown-heading" dir="auto"><h1 tabindex="-1" class="heading-element" dir="auto">How does it work?</h1><a id="user-content-how-does-it-work" class="anchor" aria-label="Permalink: How does it work?" href="#how-does-it-work"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <p dir="auto">While I mark tmf as a "lossy compression format" in a classical meaning of this word, it really does not <em>compress</em> anything (at least for now). The bulk of the space savings come from storing the model data in different data structures that better reflect the data they store, and saving data with exactly precision it needs(e.g. 9 or 23 bit data types).</p> <div class="markdown-heading" dir="auto"><h1 tabindex="-1" class="heading-element" dir="auto">Comparisions</h1><a id="user-content-comparisions" class="anchor" aria-label="Permalink: Comparisions" href="#comparisions"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <p dir="auto">The model used in test is the blender monkey(Suzzane). TMF files were saved with default settings(<code>TMFPrecisionInfo::default()</code>).</p> <div class="markdown-heading" dir="auto"><h2 tabindex="-1" class="heading-element" dir="auto">File size comparison</h2><a id="user-content-file-size-comparison" class="anchor" aria-label="Permalink: File size comparison" href="#file-size-comparison"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <markdown-accessiblity-table><table> <thead> <tr> <th>Format</th> <th>Size</th> </tr> </thead> <tbody> <tr> <td>.obj</td> <td>1.3 MB</td> </tr> <tr> <td>zip(deflate) compressed .obj</td> <td>367.7 kB</td> </tr> <tr> <td>.fbx</td> <td>651.0 kB</td> </tr> <tr> <td>zip(deflate) compressed .fbx</td> <td>600.6 kB</td> </tr> <tr> <td>.gltf</td> <td>476.5 kB</td> </tr> <tr> <td>zip(deflate) compressed .gltf</td> <td>302.1 kB</td> </tr> <tr> <td>.glb</td> <td>356.6 kB</td> </tr> <tr> <td>zip(deflate) compressed .glb</td> <td>267.5 kB</td> </tr> <tr> <td>.tmf</td> <td>308.3 kB</td> </tr> <tr> <td>.tmf with pre-encode optimisations applied</td> <td><strong>161.9 kB</strong></td> </tr> <tr> <td>.tmf with pre-encode optimisations and hand-picked quality settings</td> <td><strong>142.4 kB</strong></td> </tr> <tr> <td>zip(deflate) compressed .tmf</td> <td>307.9 kB</td> </tr> <tr> <td>zip(deflate) compressed .tmf, with pre-encode optimizations</td> <td>160.2 kB</td> </tr> <tr> <td>zip(deflate) compressed .tmf, with pre-encode optimizations, hand-picked quality settings</td> <td>141.0 kB</td> </tr> <tr> <td>draco on max compression settings</td> <td>~22 kB</td> </tr> </tbody> </table></markdown-accessiblity-table> <div class="markdown-heading" dir="auto"><h2 tabindex="-1" class="heading-element" dir="auto">TMF vs. Draco.</h2><a id="user-content-tmf-vs-draco" class="anchor" aria-label="Permalink: TMF vs. Draco." href="#tmf-vs-draco"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <p dir="auto">Draco is noticeably better at compression than TMF. If all you are looking for is reduced file size, then just use Draco. But if you are looking for both high compression and fast reads, tmf can be a vaible alternative.</p> <div class="markdown-heading" dir="auto"><h3 tabindex="-1" class="heading-element" dir="auto">A comparison of some pros and cons</h3><a id="user-content-a-comparison-of-some-pros-and-cons" class="anchor" aria-label="Permalink: A comparison of some pros and cons" href="#a-comparison-of-some-pros-and-cons"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <p dir="auto"><em>NOTE: when compression ratios/percentages are given, all formats(eg. tmf,draco,fbx) are compared to .obj as uncompressed base</em>.</p> <markdown-accessiblity-table><table> <thead> <tr> <th>Category</th> <th>Draco</th> <th>TMF</th> </tr> </thead> <tbody> <tr> <td>Compression Ratio</td> <td>Draco is generally better at compressing data, depending on the compression settings it can be between ~80-98%</td> <td>TMF can compress your file by around 87.3%</td> </tr> <tr> <td>3D model(Suzanne) read time</td> <td>7-10 ms</td> <td>~0.6 ms</td> </tr> <tr> <td>Impact of compression on read time</td> <td>Read time increases with compression level</td> <td>For most settings read time <strong>decreases</strong> with compression level</td> </tr> <tr> <td>3D model(Suzanne) write time</td> <td>10-18 ms</td> <td>~7 ms</td> </tr> <tr> <td>Language</td> <td>C++</td> <td>Rust</td> </tr> <tr> <td>Official Rust support</td> <td>None</td> <td>Native</td> </tr> <tr> <td>Build Dependencies</td> <td>C++ compiler, cmake, make</td> <td>only standard rust tollchain</td> </tr> <tr> <td>Using in rust project</td> <td>Requires manual linking</td> <td>installs and links automatically using cargo</td> </tr> </tbody> </table></markdown-accessiblity-table> <div class="markdown-heading" dir="auto"><h2 tabindex="-1" class="heading-element" dir="auto">What can lead to compression of a particular mesh being less efficient?</h2><a id="user-content-what-can-lead-to-compression-of-a-particular-mesh-being-less-efficient" class="anchor" aria-label="Permalink: What can lead to compression of a particular mesh being less efficient?" href="#what-can-lead-to-compression-of-a-particular-mesh-being-less-efficient"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <p dir="auto">Greatly varying LOD: The save system dynamically adjusts to the LOD of the mesh. For example, a low-poly castle mesh may be saved with precision of 10 cm and a strawberry model may be saved with 1 mm precision. Saving those two object in one <em>mesh</em>(not file!) will force the castle mesh to be saved with higher precision, wasting space. Because most meshes will naturally have a consistent LOD, and meshes that don't would almost always lead to issues elsewhere, this problem is rarely encountered.</p> <div class="markdown-heading" dir="auto"><h1 tabindex="-1" class="heading-element" dir="auto">Examples</h1><a id="user-content-examples" class="anchor" aria-label="Permalink: Examples" href="#examples"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <div class="markdown-heading" dir="auto"><h2 tabindex="-1" class="heading-element" dir="auto">Mesh loading</h2><a id="user-content-mesh-loading" class="anchor" aria-label="Permalink: Mesh loading" href="#mesh-loading"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <p dir="auto">Loading one mesh</p> <div class="highlight highlight-source-rust notranslate position-relative overflow-auto" dir="auto" data-snippet-clipboard-copy-content="use tmf::TMFMesh; use std::fs::File; let input = File::open("suzanne.tmf").expect("Could not open .tmf file!"); let (mesh,name) = TMFMesh::read_tmf_one(&mut input).expect("Could not read TMF file!"); // Geting mesh data let vertices = mesh.get_vertices().expect("No vertices!"); let vertex_triangles = mesh.get_vertex_triangles().expect("No vertiex triangle array!"); let normals = mesh.get_normals().expect("No normals!"); let normal_triangles = mesh.get_normal_triangles().expect("No normal triangle array!"); let uvs = mesh.get_uvs().expect("No uvs!"); let uv_triangles = mesh.get_uv_triangles().expect("No uv triangle array!"); // Can provide arrays laid out like OpenGL buffers for ease of use when developing games! let buff_vert_array = mesh.get_vertex_buffer(); let buff_norm_array = mesh.get_normal_buffer(); let buff_uv_array = mesh.get_uv_buffer();"><pre><span class="pl-k">use</span> tmf<span class="pl-kos">::</span><span class="pl-v">TMFMesh</span><span class="pl-kos">;</span> <span class="pl-k">use</span> std<span class="pl-kos">::</span>fs<span class="pl-kos">::</span><span class="pl-v">File</span><span class="pl-kos">;</span> <span class="pl-k">let</span> input = <span class="pl-smi">File</span><span class="pl-kos">::</span><span class="pl-en">open</span><span class="pl-kos">(</span><span class="pl-s">"suzanne.tmf"</span><span class="pl-kos">)</span><span class="pl-kos">.</span><span class="pl-en">expect</span><span class="pl-kos">(</span><span class="pl-s">"Could not open .tmf file!"</span><span class="pl-kos">)</span><span class="pl-kos">;</span> <span class="pl-k">let</span> <span class="pl-kos">(</span>mesh<span class="pl-kos">,</span>name<span class="pl-kos">)</span> = <span class="pl-smi">TMFMesh</span><span class="pl-kos">::</span><span class="pl-en">read_tmf_one</span><span class="pl-kos">(</span><span class="pl-c1">&</span><span class="pl-k">mut</span> input<span class="pl-kos">)</span><span class="pl-kos">.</span><span class="pl-en">expect</span><span class="pl-kos">(</span><span class="pl-s">"Could not read TMF file!"</span><span class="pl-kos">)</span><span class="pl-kos">;</span> <span class="pl-c">// Geting mesh data</span> <span class="pl-k">let</span> vertices = mesh<span class="pl-kos">.</span><span class="pl-en">get_vertices</span><span class="pl-kos">(</span><span class="pl-kos">)</span><span class="pl-kos">.</span><span class="pl-en">expect</span><span class="pl-kos">(</span><span class="pl-s">"No vertices!"</span><span class="pl-kos">)</span><span class="pl-kos">;</span> <span class="pl-k">let</span> vertex_triangles = mesh<span class="pl-kos">.</span><span class="pl-en">get_vertex_triangles</span><span class="pl-kos">(</span><span class="pl-kos">)</span><span class="pl-kos">.</span><span class="pl-en">expect</span><span class="pl-kos">(</span><span class="pl-s">"No vertiex triangle array!"</span><span class="pl-kos">)</span><span class="pl-kos">;</span> <span class="pl-k">let</span> normals = mesh<span class="pl-kos">.</span><span class="pl-en">get_normals</span><span class="pl-kos">(</span><span class="pl-kos">)</span><span class="pl-kos">.</span><span class="pl-en">expect</span><span class="pl-kos">(</span><span class="pl-s">"No normals!"</span><span class="pl-kos">)</span><span class="pl-kos">;</span> <span class="pl-k">let</span> normal_triangles = mesh<span class="pl-kos">.</span><span class="pl-en">get_normal_triangles</span><span class="pl-kos">(</span><span class="pl-kos">)</span><span class="pl-kos">.</span><span class="pl-en">expect</span><span class="pl-kos">(</span><span class="pl-s">"No normal triangle array!"</span><span class="pl-kos">)</span><span class="pl-kos">;</span> <span class="pl-k">let</span> uvs = mesh<span class="pl-kos">.</span><span class="pl-en">get_uvs</span><span class="pl-kos">(</span><span class="pl-kos">)</span><span class="pl-kos">.</span><span class="pl-en">expect</span><span class="pl-kos">(</span><span class="pl-s">"No uvs!"</span><span class="pl-kos">)</span><span class="pl-kos">;</span> <span class="pl-k">let</span> uv_triangles = mesh<span class="pl-kos">.</span><span class="pl-en">get_uv_triangles</span><span class="pl-kos">(</span><span class="pl-kos">)</span><span class="pl-kos">.</span><span class="pl-en">expect</span><span class="pl-kos">(</span><span class="pl-s">"No uv triangle array!"</span><span class="pl-kos">)</span><span class="pl-kos">;</span> <span class="pl-c">// Can provide arrays laid out like OpenGL buffers for ease of use when developing games!</span> <span class="pl-k">let</span> buff_vert_array = mesh<span class="pl-kos">.</span><span class="pl-en">get_vertex_buffer</span><span class="pl-kos">(</span><span class="pl-kos">)</span><span class="pl-kos">;</span> <span class="pl-k">let</span> buff_norm_array = mesh<span class="pl-kos">.</span><span class="pl-en">get_normal_buffer</span><span class="pl-kos">(</span><span class="pl-kos">)</span><span class="pl-kos">;</span> <span class="pl-k">let</span> buff_uv_array = mesh<span class="pl-kos">.</span><span class="pl-en">get_uv_buffer</span><span class="pl-kos">(</span><span class="pl-kos">)</span><span class="pl-kos">;</span></pre></div> <p dir="auto">Loading multiple meshes</p> <div class="highlight highlight-source-rust notranslate position-relative overflow-auto" dir="auto" data-snippet-clipboard-copy-content="use tmf::TMFMesh; use std::fs::File; let input = File::open("suzanne.tmf").expect("Could not open .tmf file!"); let meshes = TMFMesh::read_tmf_one(&mut input).expect("Could not open TMF file!"); for (mesh,name) in meshes{ do_something(mesh,name); }"><pre><span class="pl-k">use</span> tmf<span class="pl-kos">::</span><span class="pl-v">TMFMesh</span><span class="pl-kos">;</span> <span class="pl-k">use</span> std<span class="pl-kos">::</span>fs<span class="pl-kos">::</span><span class="pl-v">File</span><span class="pl-kos">;</span> <span class="pl-k">let</span> input = <span class="pl-smi">File</span><span class="pl-kos">::</span><span class="pl-en">open</span><span class="pl-kos">(</span><span class="pl-s">"suzanne.tmf"</span><span class="pl-kos">)</span><span class="pl-kos">.</span><span class="pl-en">expect</span><span class="pl-kos">(</span><span class="pl-s">"Could not open .tmf file!"</span><span class="pl-kos">)</span><span class="pl-kos">;</span> <span class="pl-k">let</span> meshes = <span class="pl-smi">TMFMesh</span><span class="pl-kos">::</span><span class="pl-en">read_tmf_one</span><span class="pl-kos">(</span><span class="pl-c1">&</span><span class="pl-k">mut</span> input<span class="pl-kos">)</span><span class="pl-kos">.</span><span class="pl-en">expect</span><span class="pl-kos">(</span><span class="pl-s">"Could not open TMF file!"</span><span class="pl-kos">)</span><span class="pl-kos">;</span> <span class="pl-k">for</span> <span class="pl-kos">(</span>mesh<span class="pl-kos">,</span>name<span class="pl-kos">)</span> <span class="pl-k">in</span> meshes<span class="pl-kos">{</span> <span class="pl-en">do_something</span><span class="pl-kos">(</span>mesh<span class="pl-kos">,</span>name<span class="pl-kos">)</span><span class="pl-kos">;</span> <span class="pl-kos">}</span></pre></div> <div class="markdown-heading" dir="auto"><h2 tabindex="-1" class="heading-element" dir="auto">Mesh Saving</h2><a id="user-content-mesh-saving" class="anchor" aria-label="Permalink: Mesh Saving" href="#mesh-saving"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <p dir="auto">Saving one mesh</p> <div class="highlight highlight-source-rust notranslate position-relative overflow-auto" dir="auto" data-snippet-clipboard-copy-content="use tmf::TMFMesh; use std::fs::File; let output = File::create("suzanne.tmf").expect("Could not create output file!"); let settings = TMFPrecisionInfo::default(); // Change TMF mesh to have better laid out data. This can save significant ammounts of space. mesh.unify_index_data(); mesh.write_tmf_one(&mut output,&settings,name).expect("Could not save TMF mesh!");"><pre><span class="pl-k">use</span> tmf<span class="pl-kos">::</span><span class="pl-v">TMFMesh</span><span class="pl-kos">;</span> <span class="pl-k">use</span> std<span class="pl-kos">::</span>fs<span class="pl-kos">::</span><span class="pl-v">File</span><span class="pl-kos">;</span> <span class="pl-k">let</span> output = <span class="pl-smi">File</span><span class="pl-kos">::</span><span class="pl-en">create</span><span class="pl-kos">(</span><span class="pl-s">"suzanne.tmf"</span><span class="pl-kos">)</span><span class="pl-kos">.</span><span class="pl-en">expect</span><span class="pl-kos">(</span><span class="pl-s">"Could not create output file!"</span><span class="pl-kos">)</span><span class="pl-kos">;</span> <span class="pl-k">let</span> settings = <span class="pl-smi">TMFPrecisionInfo</span><span class="pl-kos">::</span><span class="pl-en">default</span><span class="pl-kos">(</span><span class="pl-kos">)</span><span class="pl-kos">;</span> <span class="pl-c">// Change TMF mesh to have better laid out data. This can save significant ammounts of space.</span> mesh<span class="pl-kos">.</span><span class="pl-en">unify_index_data</span><span class="pl-kos">(</span><span class="pl-kos">)</span><span class="pl-kos">;</span> mesh<span class="pl-kos">.</span><span class="pl-en">write_tmf_one</span><span class="pl-kos">(</span><span class="pl-c1">&</span><span class="pl-k">mut</span> output<span class="pl-kos">,</span><span class="pl-c1">&</span>settings<span class="pl-kos">,</span>name<span class="pl-kos">)</span><span class="pl-kos">.</span><span class="pl-en">expect</span><span class="pl-kos">(</span><span class="pl-s">"Could not save TMF mesh!"</span><span class="pl-kos">)</span><span class="pl-kos">;</span></pre></div> <p dir="auto">Saving multiple meshes</p> <div class="highlight highlight-source-rust notranslate position-relative overflow-auto" dir="auto" data-snippet-clipboard-copy-content="use tmf::TMFMesh; use std::fs::File; let output = File::open("suzanne.tmf").expect("Could not create .tmf file!"); TMFMesh::write_tmf(meshes,&mut input,&settings).expect("Could not write TMF mesh!");"><pre><span class="pl-k">use</span> tmf<span class="pl-kos">::</span><span class="pl-v">TMFMesh</span><span class="pl-kos">;</span> <span class="pl-k">use</span> std<span class="pl-kos">::</span>fs<span class="pl-kos">::</span><span class="pl-v">File</span><span class="pl-kos">;</span> <span class="pl-k">let</span> output = <span class="pl-smi">File</span><span class="pl-kos">::</span><span class="pl-en">open</span><span class="pl-kos">(</span><span class="pl-s">"suzanne.tmf"</span><span class="pl-kos">)</span><span class="pl-kos">.</span><span class="pl-en">expect</span><span class="pl-kos">(</span><span class="pl-s">"Could not create .tmf file!"</span><span class="pl-kos">)</span><span class="pl-kos">;</span> <span class="pl-smi">TMFMesh</span><span class="pl-kos">::</span><span class="pl-en">write_tmf</span><span class="pl-kos">(</span>meshes<span class="pl-kos">,</span><span class="pl-c1">&</span><span class="pl-k">mut</span> input<span class="pl-kos">,</span><span class="pl-c1">&</span>settings<span class="pl-kos">)</span><span class="pl-kos">.</span><span class="pl-en">expect</span><span class="pl-kos">(</span><span class="pl-s">"Could not write TMF mesh!"</span><span class="pl-kos">)</span><span class="pl-kos">;</span></pre></div> <div class="markdown-heading" dir="auto"><h1 tabindex="-1" class="heading-element" dir="auto">Features</h1><a id="user-content-features" class="anchor" aria-label="Permalink: Features" href="#features"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <div class="markdown-heading" dir="auto"><h1 tabindex="-1" class="heading-element" dir="auto">0.1 (Current version)</h1><a id="user-content-01-current-version" class="anchor" aria-label="Permalink: 0.1 (Current version)" href="#01-current-version"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <ul class="contains-task-list"> <li class="task-list-item"><input type="checkbox" id="" disabled="" class="task-list-item-checkbox" checked=""> Exporting .obj</li> <li class="task-list-item"><input type="checkbox" id="" disabled="" class="task-list-item-checkbox" checked=""> Importing .obj</li> <li class="task-list-item"><input type="checkbox" id="" disabled="" class="task-list-item-checkbox" checked=""> Importing not-triangulated .obj models - <strong>experimental</strong>, supports only convex polygons</li> <li class="task-list-item"><input type="checkbox" id="" disabled="" class="task-list-item-checkbox" checked=""> Writing/Reading .tmf files</li> <li class="task-list-item"><input type="checkbox" id="" disabled="" class="task-list-item-checkbox" checked=""> Point Positions</li> <li class="task-list-item"><input type="checkbox" id="" disabled="" class="task-list-item-checkbox" checked=""> Point Normals</li> <li class="task-list-item"><input type="checkbox" id="" disabled="" class="task-list-item-checkbox" checked=""> Point Uv coordinates</li> <li class="task-list-item"><input type="checkbox" id="" disabled="" class="task-list-item-checkbox" checked=""> Mesh triangles</li> <li class="task-list-item"><input type="checkbox" id="" disabled="" class="task-list-item-checkbox" checked=""> Point clouds</li> <li class="task-list-item"><input type="checkbox" id="" disabled="" class="task-list-item-checkbox" checked=""> Multiple meshes in one file</li> <li class="task-list-item"><input type="checkbox" id="" disabled="" class="task-list-item-checkbox" checked=""> Fully customizable save precision settings</li> <li class="task-list-item"><input type="checkbox" id="" disabled="" class="task-list-item-checkbox" checked=""> Full documentation</li> <li class="task-list-item"><input type="checkbox" id="" disabled="" class="task-list-item-checkbox" checked=""> Examples for each function in the crate</li> <li class="task-list-item"><input type="checkbox" id="" disabled="" class="task-list-item-checkbox" checked=""> Tangent data</li> <li class="task-list-item"><input type="checkbox" id="" disabled="" class="task-list-item-checkbox" checked=""> Custom mesh data</li> <li class="task-list-item"><input type="checkbox" id="" disabled="" class="task-list-item-checkbox" checked=""> Support for RGBA vertex colors(grayscale support using a float attribute), and float/integer vertex attributes.</li> </ul> <div class="markdown-heading" dir="auto"><h1 tabindex="-1" class="heading-element" dir="auto">Planed Features</h1><a id="user-content-planed-features" class="anchor" aria-label="Permalink: Planed Features" href="#planed-features"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <ul class="contains-task-list"> <li class="task-list-item"><input type="checkbox" id="" disabled="" class="task-list-item-checkbox"> Vertex groups</li> <li class="task-list-item"><input type="checkbox" id="" disabled="" class="task-list-item-checkbox"> Materials <em>some initial work already done</em></li> </ul> <div class="markdown-heading" dir="auto"><h1 tabindex="-1" class="heading-element" dir="auto">More in-depth explanation of compression</h1><a id="user-content-more-in-depth-explanation-of-compression" class="anchor" aria-label="Permalink: More in-depth explanation of compression" href="#more-in-depth-explanation-of-compression"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <div class="markdown-heading" dir="auto"><h2 tabindex="-1" class="heading-element" dir="auto">Math-based savings</h2><a id="user-content-math-based-savings" class="anchor" aria-label="Permalink: Math-based savings" href="#math-based-savings"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <p dir="auto">Many formats used for saving of 3D models are shockingly wasteful. There are <em>a lot</em> of opportunities to reduce file size, even when using lossless compression. For example, many model formats treat surface normal vectors like any other vectors. But they <em>aren't</em> like other vectors! They have some special properties, which can be exploited to save them more efficiently. Namely:</p> <ol dir="auto"> <li>All components in a normal vector fall into range <-1,1>. This means that values such as 1.3, 123.0, 69.323, or even 6.50e+12 can <strong>never</strong> occur in a normal vector, so saving them using a format which supports those values is wasteful.</li> <li>All normal vectors fulfil conditions x^2 + y^2 + z^2 = 1. This means, that there are a <em>lot</em> of vectors that have all their components in range <-1,1> but aren't valid surface normals. If saving those invalid values is supported, this means that there is wasted space. So, by taking into consideration those properties of normals, they can be saved in such a way that each combination of saved bits correspond to a different normal, wasting no space!</li> </ol> <p dir="auto">An analogical approach is taken for each and every element of model data, reducing the size even further.</p> <div class="markdown-heading" dir="auto"><h2 tabindex="-1" class="heading-element" dir="auto">Bits vs Bytes based savings.</h2><a id="user-content-bits-vs-bytes-based-savings" class="anchor" aria-label="Permalink: Bits vs Bytes based savings." href="#bits-vs-bytes-based-savings"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <p dir="auto">A disadvantage of using byte-aligned data types is lack of granularity of precision when saving data. A good example of this may be a UV coordinate that should represent a point on a 1024 pixel texture, with precision of .25 pixels. Doing some quick back of the napkin maths, it can be determined that a precision of log2(1024/.25) = log2(4096) = 12 bits is required. But only available data types are either too small (u8) or way too big(u16, 25% of disk space would go to waste!). The solution is forgoing byte alignment. It comes with a slight performance penalty of having to do bit shifts, and inability to use pre-built compression algorithms (they assume byte-alignment), but come with huge advantage of using data types just wide enough to save what is needed and not any wider. Data is laid out like that in what I call an UBA (Unaligned Binary Array). Data in an UBA consists of a series of data with any binary size, where consecutive data may cross byte boundaries, start or end at any point in a byte, and there is no padding. The size of elements is usually specified before the UBA itself. For some widths, like 9 bits, savings coming from using UBA's can reach as much as 44%!</p> </article></div></div></div></div></div> <!-- --> <!-- --> <script type="application/json" id="__PRIMER_DATA_:R0:__">{"resolvedServerColorMode":"day"}</script></div> </react-partial> <input type="hidden" data-csrf="true" value="fWnh88dspV9XVplIh7R+z8yV/3x0d+pxKddLtPIPteBzXA0czZU5SCPwy5ZqATLnH54HqWJcJRd77IxqVB2fUg==" /> </div> <div data-view-component="true" class="Layout-sidebar"> <div class="BorderGrid about-margin" data-pjax> <div class="BorderGrid-row"> <div class="BorderGrid-cell"> <div class="hide-sm hide-md"> <h2 class="mb-3 h4">About</h2> <p class="f4 my-3"> Tight Model format is an experimental lossy 3D model format focused on reducing file size as much as posible without decreasing visual quality of the viewed model or read speeds. </p> <h3 class="sr-only">Topics</h3> <div class="my-3"> <div class="f6"> <a href="/topics/compression" title="Topic: compression" data-view-component="true" 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