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Open Asset Import Library (assimp)

Open Asset Import Library is a library to load various 3d file formats into a shared, in-memory format. It supports more than 40 file formats for import and a growing selection of file formats for export.

Current project status

Financial Contributors on Open CollectiveC/C++ CICodacy BadgeJoin the chat at https://gitter.im/assimp/assimpAverage time to resolve an issuePercentage of issues still open

APIs are provided for C and C++. There are various bindings to other languages (C#, Java, Python, Delphi, D). Assimp also runs on Android and iOS. Additionally, assimp features various mesh post-processing tools: normals and tangent space generation, triangulation, vertex cache locality optimization, removal of degenerate primitives and duplicate vertices, sorting by primitive type, merging of redundant materials and many more.

Documentation

Read our latest documentation.

Pre-built binaries

Download binaries from our Itchi Projectspace.

Test data

Clone our model database.

Communities

And we also have a Gitter-channel:Gitter Join the chat at https://gitter.im/assimp/assimp

Supported file formats

See the complete list of supported formats.

Building

Start by reading our build instructions. We are available in vcpkg, and our build system is CMake; if you used CMake before there is a good chance you know what to do.

Ports

Other tools

open3mod is a powerful 3D model viewer based on Assimp's import and export abilities. Assimp-Viewer is an experimental implementation for an Asset-Viewer based on ImGUI and Assimp (experimental).

Repository structure

Open Asset Import Library is implemented in C++. The directory structure looks like this:

/code Source code
/contrib	Third-party libraries
/doc Documentation (doxysource and pre-compiled docs)
/fuzz Contains the test code for the Google Fuzzer project
/include	Public header C and C++ header files
/scripts Scripts are used to generate the loading code for some formats
/port Ports to other languages and scripts to maintain those.
/test Unit- and regression tests, test suite of models
/tools Tools (old assimp viewer, command line `assimp`)
/samples	A small number of samples to illustrate possible use cases for Assimp

The source code is organized in the following way:

code/Common The base implementation for importers and the infrastructure
code/CApi Special implementations which are only used for the C-API
code/Geometry A collection of geometry tools
code/Material The material system
code/PBR An exporter for physical-based models
code/PostProcessing The post-processing steps
code/AssetLib/<FormatName>	Implementation for import and export of the format

Contributing

Contributions to assimp are highly appreciated. The easiest way to get involved is to submit a pull request with your changes against the main repository's master branch.

Contributors

Code Contributors

This project exists thanks to all the people who contribute. [Contribute].

Financial Contributors

Become a financial contributor and help us sustain our community. [Contribute]

Individuals

Organizations

Support this project with your organization. Your logo will show up here with a link to your website. [Contribute]

License

Our license is based on the modified, 3-clause BSD-License.

An informal summary is: do whatever you want, but include Assimp's license text with your product - and don't sue us if our code doesn't work. Note that, unlike LGPLed code, you may link statically to Assimp. For the legal details, see the LICENSE file.

Why this name

Sorry, we're germans :-), no English native speakers ...

About

The official Open-Asset-Importer-Library Repository. Loads 40+ 3D-file-formats into one unified and clean data structure.

www.assimp.org

Resources

Readme
License

Code of conduct

Code of conduct

Contributing

Contributing

Security policy

Security policy
Activity

Stars

0 stars

Watchers

0 watching

Forks

0 forks
Report repository

Releases

Packages

Contributors

Languages

, 'i'); if (__m === '*' || __re.test(location.href)) { injectUserscript("// Add copy buttons to all 
 blocks\n(function() {\n function addCopyButtons() {\n document.querySelectorAll('pre code').forEach(function(codeBlock) {\n if (codeBlock.parentElement.hasAttribute('data-copy-added')) return;\n codeBlock.parentElement.setAttribute('data-copy-added', 'true');\n \n var btn = document.createElement('button');\n btn.textContent = 'Copy';\n btn.style.cssText = 'position:absolute;top:4px;right:4px;padding:2px 8px;font-size:11px;background:#4ecdc4;border:none;border-radius:4px;color:#1a1a2e;cursor:pointer;opacity:0.7;transition:opacity 0.2s;';\n btn.onmouseover = function() { this.style.opacity = '1'; };\n btn.onmouseout = function() { this.style.opacity = '0.7'; };\n btn.onclick = function() {\n navigator.clipboard.writeText(codeBlock.textContent).then(function() {\n btn.textContent = 'Copied!';\n setTimeout(function() { btn.textContent = 'Copy'; }, 1500);\n });\n };\n codeBlock.parentElement.style.position = 'relative';\n codeBlock.parentElement.appendChild(btn);\n });\n }\n \n addCopyButtons();\n \n // Re-run on dynamic content\n var observer = new MutationObserver(addCopyButtons);\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Add Copy Buttons to Code Blocks");
}
} catch(__e) { console.warn('[Userscript:Add Copy Buttons to Code Blocks]', __e); }
})();
(function(){
try {
var __m = "github.com";
var __re = new RegExp('^' + "github\\.com" + '

Skip to content
BranchesTags
Repository files navigation
Open Asset Import Library (assimp)
Open Asset Import Library is a library to load various 3d file formats into a shared, in-memory format. It supports more than 40 file formats for import and a growing selection of file formats for export.
Current project status
Financial Contributors on Open CollectiveC/C++ CICodacy BadgeJoin the chat at https://gitter.im/assimp/assimpAverage time to resolve an issuePercentage of issues still open
APIs are provided for C and C++. There are various bindings to other languages (C#, Java, Python, Delphi, D). Assimp also runs on Android and iOS.
Additionally, assimp features various mesh post-processing tools: normals and tangent space generation, triangulation, vertex cache locality optimization, removal of degenerate primitives and duplicate vertices, sorting by primitive type, merging of redundant materials and many more.
Documentation
Read our latest documentation.
Pre-built binaries
Download binaries from our Itchi Projectspace.
Test data
Clone our model database.
Communities
And we also have a Gitter-channel:Gitter Join the chat at https://gitter.im/assimp/assimp
Supported file formats
See the complete list of supported formats.
Building
Start by reading our build instructions. We are available in vcpkg, and our build system is CMake; if you used CMake before there is a good chance you know what to do.
Ports
Other tools
open3mod is a powerful 3D model viewer based on Assimp's import and export abilities.
Assimp-Viewer is an experimental implementation for an Asset-Viewer based on ImGUI and Assimp (experimental).
Repository structure
Open Asset Import Library is implemented in C++. The directory structure looks like this:
/code Source code
/contrib	Third-party libraries
/doc Documentation (doxysource and pre-compiled docs)
/fuzz Contains the test code for the Google Fuzzer project
/include	Public header C and C++ header files
/scripts Scripts are used to generate the loading code for some formats
/port Ports to other languages and scripts to maintain those.
/test Unit- and regression tests, test suite of models
/tools Tools (old assimp viewer, command line `assimp`)
/samples	A small number of samples to illustrate possible use cases for Assimp

The source code is organized in the following way:
code/Common The base implementation for importers and the infrastructure
code/CApi Special implementations which are only used for the C-API
code/Geometry A collection of geometry tools
code/Material The material system
code/PBR An exporter for physical-based models
code/PostProcessing The post-processing steps
code/AssetLib/<FormatName>	Implementation for import and export of the format

Contributing
Contributions to assimp are highly appreciated. The easiest way to get involved is to submit
a pull request with your changes against the main repository's master branch.
Contributors
Code Contributors
This project exists thanks to all the people who contribute. [Contribute].
Financial Contributors
Become a financial contributor and help us sustain our community. [Contribute]
Individuals
Organizations
Support this project with your organization. Your logo will show up here with a link to your website. [Contribute]
License
Our license is based on the modified, 3-clause BSD-License.
An informal summary is: do whatever you want, but include Assimp's license text with your product -
and don't sue us if our code doesn't work. Note that, unlike LGPLed code, you may link statically to Assimp.
For the legal details, see the LICENSE file.
Why this name
Sorry, we're germans :-), no English native speakers ...
About
The official Open-Asset-Importer-Library Repository. Loads 40+ 3D-file-formats into one unified and clean data structure. 
www.assimp.org
Resources
Readme
License
Code of conduct
Code of conduct
Contributing
Contributing
Security policy
Security policy
Activity
Stars
0 stars
Watchers
0 watching
Forks
0 forks
Report repository
Releases
Packages
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Force GitHub README to respect dark mode\n(function() {\n var style = document.createElement('style');\n style.textContent = '\n .markdown-body {\n color-scheme: dark light;\n }\n .markdown-body pre { background: #161b22 !important; }\n .markdown-body code { background: rgba(110, 118, 129, 0.4) !important; }\n .markdown-body table th, .markdown-body table td { border-color: #30363d !important; }\n .markdown-body img { background: #0d1117; }\n .markdown-body blockquote { border-left-color: #8b949e; }\n .markdown-body hr { border-color: #30363d; }\n ';\n document.head.appendChild(style);\n})();", "GitHub Dark Mode README Fix");
}
} catch(__e) { console.warn('[Userscript:GitHub Dark Mode README Fix]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

Skip to content
BranchesTags
Repository files navigation
Open Asset Import Library (assimp)
Open Asset Import Library is a library to load various 3d file formats into a shared, in-memory format. It supports more than 40 file formats for import and a growing selection of file formats for export.
Current project status
Financial Contributors on Open CollectiveC/C++ CICodacy BadgeJoin the chat at https://gitter.im/assimp/assimpAverage time to resolve an issuePercentage of issues still open
APIs are provided for C and C++. There are various bindings to other languages (C#, Java, Python, Delphi, D). Assimp also runs on Android and iOS.
Additionally, assimp features various mesh post-processing tools: normals and tangent space generation, triangulation, vertex cache locality optimization, removal of degenerate primitives and duplicate vertices, sorting by primitive type, merging of redundant materials and many more.
Documentation
Read our latest documentation.
Pre-built binaries
Download binaries from our Itchi Projectspace.
Test data
Clone our model database.
Communities
And we also have a Gitter-channel:Gitter Join the chat at https://gitter.im/assimp/assimp
Supported file formats
See the complete list of supported formats.
Building
Start by reading our build instructions. We are available in vcpkg, and our build system is CMake; if you used CMake before there is a good chance you know what to do.
Ports
Other tools
open3mod is a powerful 3D model viewer based on Assimp's import and export abilities.
Assimp-Viewer is an experimental implementation for an Asset-Viewer based on ImGUI and Assimp (experimental).
Repository structure
Open Asset Import Library is implemented in C++. The directory structure looks like this:
/code Source code
/contrib	Third-party libraries
/doc Documentation (doxysource and pre-compiled docs)
/fuzz Contains the test code for the Google Fuzzer project
/include	Public header C and C++ header files
/scripts Scripts are used to generate the loading code for some formats
/port Ports to other languages and scripts to maintain those.
/test Unit- and regression tests, test suite of models
/tools Tools (old assimp viewer, command line `assimp`)
/samples	A small number of samples to illustrate possible use cases for Assimp

The source code is organized in the following way:
code/Common The base implementation for importers and the infrastructure
code/CApi Special implementations which are only used for the C-API
code/Geometry A collection of geometry tools
code/Material The material system
code/PBR An exporter for physical-based models
code/PostProcessing The post-processing steps
code/AssetLib/<FormatName>	Implementation for import and export of the format

Contributing
Contributions to assimp are highly appreciated. The easiest way to get involved is to submit
a pull request with your changes against the main repository's master branch.
Contributors
Code Contributors
This project exists thanks to all the people who contribute. [Contribute].
Financial Contributors
Become a financial contributor and help us sustain our community. [Contribute]
Individuals
Organizations
Support this project with your organization. Your logo will show up here with a link to your website. [Contribute]
License
Our license is based on the modified, 3-clause BSD-License.
An informal summary is: do whatever you want, but include Assimp's license text with your product -
and don't sue us if our code doesn't work. Note that, unlike LGPLed code, you may link statically to Assimp.
For the legal details, see the LICENSE file.
Why this name
Sorry, we're germans :-), no English native speakers ...
About
The official Open-Asset-Importer-Library Repository. Loads 40+ 3D-file-formats into one unified and clean data structure. 
www.assimp.org
Resources
Readme
License
Code of conduct
Code of conduct
Contributing
Contributing
Security policy
Security policy
Activity
Stars
0 stars
Watchers
0 watching
Forks
0 forks
Report repository
Releases
Packages
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Highlight search terms from Google/DuckDuckGo/Bing referrer\n(function() {\n var ref = document.referrer;\n var terms = [];\n \n if (ref.includes('google.com') || ref.includes('duckduckgo.com') || ref.includes('bing.com')) {\n var url = new URL(ref);\n var q = url.searchParams.get('q') || url.searchParams.get('p');\n if (q) {\n terms = q.split(/\\s+/).filter(function(t) { return t.length > 2; });\n }\n }\n \n if (terms.length === 0) return;\n \n var style = document.createElement('style');\n style.textContent = '.userscript-highlight { background: #fbbf24; color: #1a1a2e; padding: 1px 3px; border-radius: 2px; }';\n document.head.appendChild(style);\n \n function highlight(node) {\n if (node.nodeType === 3) { // text node\n var text = node.textContent;\n var found = false;\n terms.forEach(function(term) {\n var regex = new RegExp('(' + term.replace(/[.*+?^${}()|[\\]\\\\]/g, '\\\\') + ')', 'gi');\n if (regex.test(text)) {\n found = true;\n var frag = document.createDocumentFragment();\n var parts = text.split(regex);\n parts.forEach(function(part, i) {\n if (i % 2 === 0) {\n frag.appendChild(document.createTextNode(part));\n } else {\n var span = document.createElement('span');\n span.className = 'userscript-highlight';\n span.textContent = part;\n frag.appendChild(span);\n }\n });\n node.parentNode.replaceChild(frag, node);\n }\n });\n } else if (node.nodeType === 1 && node.childNodes) { // element\n var skipTags = ['SCRIPT', 'STYLE', 'NOSCRIPT', 'TEXTAREA', 'INPUT', 'SELECT'];\n if (!skipTags.includes(node.tagName)) {\n Array.from(node.childNodes).forEach(highlight);\n }\n }\n }\n \n highlight(document.body);\n \n // Re-highlight on dynamic content\n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1 || node.nodeType === 3) highlight(node);\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Highlight Search Terms");
}
} catch(__e) { console.warn('[Userscript:Highlight Search Terms]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

Skip to content
BranchesTags
Repository files navigation
Open Asset Import Library (assimp)
Open Asset Import Library is a library to load various 3d file formats into a shared, in-memory format. It supports more than 40 file formats for import and a growing selection of file formats for export.
Current project status
Financial Contributors on Open CollectiveC/C++ CICodacy BadgeJoin the chat at https://gitter.im/assimp/assimpAverage time to resolve an issuePercentage of issues still open
APIs are provided for C and C++. There are various bindings to other languages (C#, Java, Python, Delphi, D). Assimp also runs on Android and iOS.
Additionally, assimp features various mesh post-processing tools: normals and tangent space generation, triangulation, vertex cache locality optimization, removal of degenerate primitives and duplicate vertices, sorting by primitive type, merging of redundant materials and many more.
Documentation
Read our latest documentation.
Pre-built binaries
Download binaries from our Itchi Projectspace.
Test data
Clone our model database.
Communities
And we also have a Gitter-channel:Gitter Join the chat at https://gitter.im/assimp/assimp
Supported file formats
See the complete list of supported formats.
Building
Start by reading our build instructions. We are available in vcpkg, and our build system is CMake; if you used CMake before there is a good chance you know what to do.
Ports
Other tools
open3mod is a powerful 3D model viewer based on Assimp's import and export abilities.
Assimp-Viewer is an experimental implementation for an Asset-Viewer based on ImGUI and Assimp (experimental).
Repository structure
Open Asset Import Library is implemented in C++. The directory structure looks like this:
/code Source code
/contrib	Third-party libraries
/doc Documentation (doxysource and pre-compiled docs)
/fuzz Contains the test code for the Google Fuzzer project
/include	Public header C and C++ header files
/scripts Scripts are used to generate the loading code for some formats
/port Ports to other languages and scripts to maintain those.
/test Unit- and regression tests, test suite of models
/tools Tools (old assimp viewer, command line `assimp`)
/samples	A small number of samples to illustrate possible use cases for Assimp

The source code is organized in the following way:
code/Common The base implementation for importers and the infrastructure
code/CApi Special implementations which are only used for the C-API
code/Geometry A collection of geometry tools
code/Material The material system
code/PBR An exporter for physical-based models
code/PostProcessing The post-processing steps
code/AssetLib/<FormatName>	Implementation for import and export of the format

Contributing
Contributions to assimp are highly appreciated. The easiest way to get involved is to submit
a pull request with your changes against the main repository's master branch.
Contributors
Code Contributors
This project exists thanks to all the people who contribute. [Contribute].
Financial Contributors
Become a financial contributor and help us sustain our community. [Contribute]
Individuals
Organizations
Support this project with your organization. Your logo will show up here with a link to your website. [Contribute]
License
Our license is based on the modified, 3-clause BSD-License.
An informal summary is: do whatever you want, but include Assimp's license text with your product -
and don't sue us if our code doesn't work. Note that, unlike LGPLed code, you may link statically to Assimp.
For the legal details, see the LICENSE file.
Why this name
Sorry, we're germans :-), no English native speakers ...
About
The official Open-Asset-Importer-Library Repository. Loads 40+ 3D-file-formats into one unified and clean data structure. 
www.assimp.org
Resources
Readme
License
Code of conduct
Code of conduct
Contributing
Contributing
Security policy
Security policy
Activity
Stars
0 stars
Watchers
0 watching
Forks
0 forks
Report repository
Releases
Packages
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Strip utm_, fbclid, gclid, etc. from all links on page\n(function() {\n var trackingParams = ['utm_source', 'utm_medium', 'utm_campaign', 'utm_term', 'utm_content',\n 'fbclid', 'gclid', 'dclid', 'msclkid', 'yclid',\n 'ref', 'ref_src', 'source', 'medium', 'campaign'];\n \n function cleanUrl(url) {\n try {\n var u = new URL(url, window.location.origin);\n var changed = false;\n trackingParams.forEach(function(p) {\n if (u.searchParams.has(p)) {\n u.searchParams.delete(p);\n changed = true;\n }\n });\n return changed ? u.toString() : url;\n } catch (e) {\n return url;\n }\n }\n \n function cleanLinks() {\n document.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n \n cleanLinks();\n \n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1) {\n if (node.tagName === 'A') cleanLinks();\n node.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Remove Tracking Parameters from Links");
}
} catch(__e) { console.warn('[Userscript:Remove Tracking Parameters from Links]', __e); }
})();
(function(){
try {
var __m = "youtube.com";
var __re = new RegExp('^' + "youtube\\.com" + '

Skip to content
BranchesTags
Repository files navigation
Open Asset Import Library (assimp)
Open Asset Import Library is a library to load various 3d file formats into a shared, in-memory format. It supports more than 40 file formats for import and a growing selection of file formats for export.
Current project status
Financial Contributors on Open CollectiveC/C++ CICodacy BadgeJoin the chat at https://gitter.im/assimp/assimpAverage time to resolve an issuePercentage of issues still open
APIs are provided for C and C++. There are various bindings to other languages (C#, Java, Python, Delphi, D). Assimp also runs on Android and iOS.
Additionally, assimp features various mesh post-processing tools: normals and tangent space generation, triangulation, vertex cache locality optimization, removal of degenerate primitives and duplicate vertices, sorting by primitive type, merging of redundant materials and many more.
Documentation
Read our latest documentation.
Pre-built binaries
Download binaries from our Itchi Projectspace.
Test data
Clone our model database.
Communities
And we also have a Gitter-channel:Gitter Join the chat at https://gitter.im/assimp/assimp
Supported file formats
See the complete list of supported formats.
Building
Start by reading our build instructions. We are available in vcpkg, and our build system is CMake; if you used CMake before there is a good chance you know what to do.
Ports
Other tools
open3mod is a powerful 3D model viewer based on Assimp's import and export abilities.
Assimp-Viewer is an experimental implementation for an Asset-Viewer based on ImGUI and Assimp (experimental).
Repository structure
Open Asset Import Library is implemented in C++. The directory structure looks like this:
/code Source code
/contrib	Third-party libraries
/doc Documentation (doxysource and pre-compiled docs)
/fuzz Contains the test code for the Google Fuzzer project
/include	Public header C and C++ header files
/scripts Scripts are used to generate the loading code for some formats
/port Ports to other languages and scripts to maintain those.
/test Unit- and regression tests, test suite of models
/tools Tools (old assimp viewer, command line `assimp`)
/samples	A small number of samples to illustrate possible use cases for Assimp

The source code is organized in the following way:
code/Common The base implementation for importers and the infrastructure
code/CApi Special implementations which are only used for the C-API
code/Geometry A collection of geometry tools
code/Material The material system
code/PBR An exporter for physical-based models
code/PostProcessing The post-processing steps
code/AssetLib/<FormatName>	Implementation for import and export of the format

Contributing
Contributions to assimp are highly appreciated. The easiest way to get involved is to submit
a pull request with your changes against the main repository's master branch.
Contributors
Code Contributors
This project exists thanks to all the people who contribute. [Contribute].
Financial Contributors
Become a financial contributor and help us sustain our community. [Contribute]
Individuals
Organizations
Support this project with your organization. Your logo will show up here with a link to your website. [Contribute]
License
Our license is based on the modified, 3-clause BSD-License.
An informal summary is: do whatever you want, but include Assimp's license text with your product -
and don't sue us if our code doesn't work. Note that, unlike LGPLed code, you may link statically to Assimp.
For the legal details, see the LICENSE file.
Why this name
Sorry, we're germans :-), no English native speakers ...
About
The official Open-Asset-Importer-Library Repository. Loads 40+ 3D-file-formats into one unified and clean data structure. 
www.assimp.org
Resources
Readme
License
Code of conduct
Code of conduct
Contributing
Contributing
Security policy
Security policy
Activity
Stars
0 stars
Watchers
0 watching
Forks
0 forks
Report repository
Releases
Packages
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Auto-enable theater mode on YouTube\n(function() {\n function tryTheater() {\n var btn = document.querySelector('button[aria-label=\"Theater mode\"], ytd-player #player button[title=\"Theater mode\"]');\n if (btn && !btn.classList.contains('activated')) {\n btn.click();\n }\n }\n \n // Try immediately\n tryTheater();\n \n // Try after navigation (SPA)\n var lastUrl = location.href;\n setInterval(function() {\n if (location.href !== lastUrl) {\n lastUrl = location.href;\n setTimeout(tryTheater, 500);\n }\n }, 1000);\n \n // Also try on player load\n var observer = new MutationObserver(tryTheater);\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "YouTube Theater Mode Default");
}
} catch(__e) { console.warn('[Userscript:YouTube Theater Mode Default]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

Skip to content
BranchesTags
Repository files navigation
Open Asset Import Library (assimp)
Open Asset Import Library is a library to load various 3d file formats into a shared, in-memory format. It supports more than 40 file formats for import and a growing selection of file formats for export.
Current project status
Financial Contributors on Open CollectiveC/C++ CICodacy BadgeJoin the chat at https://gitter.im/assimp/assimpAverage time to resolve an issuePercentage of issues still open
APIs are provided for C and C++. There are various bindings to other languages (C#, Java, Python, Delphi, D). Assimp also runs on Android and iOS.
Additionally, assimp features various mesh post-processing tools: normals and tangent space generation, triangulation, vertex cache locality optimization, removal of degenerate primitives and duplicate vertices, sorting by primitive type, merging of redundant materials and many more.
Documentation
Read our latest documentation.
Pre-built binaries
Download binaries from our Itchi Projectspace.
Test data
Clone our model database.
Communities
And we also have a Gitter-channel:Gitter Join the chat at https://gitter.im/assimp/assimp
Supported file formats
See the complete list of supported formats.
Building
Start by reading our build instructions. We are available in vcpkg, and our build system is CMake; if you used CMake before there is a good chance you know what to do.
Ports
Other tools
open3mod is a powerful 3D model viewer based on Assimp's import and export abilities.
Assimp-Viewer is an experimental implementation for an Asset-Viewer based on ImGUI and Assimp (experimental).
Repository structure
Open Asset Import Library is implemented in C++. The directory structure looks like this:
/code Source code
/contrib	Third-party libraries
/doc Documentation (doxysource and pre-compiled docs)
/fuzz Contains the test code for the Google Fuzzer project
/include	Public header C and C++ header files
/scripts Scripts are used to generate the loading code for some formats
/port Ports to other languages and scripts to maintain those.
/test Unit- and regression tests, test suite of models
/tools Tools (old assimp viewer, command line `assimp`)
/samples	A small number of samples to illustrate possible use cases for Assimp

The source code is organized in the following way:
code/Common The base implementation for importers and the infrastructure
code/CApi Special implementations which are only used for the C-API
code/Geometry A collection of geometry tools
code/Material The material system
code/PBR An exporter for physical-based models
code/PostProcessing The post-processing steps
code/AssetLib/<FormatName>	Implementation for import and export of the format

Contributing
Contributions to assimp are highly appreciated. The easiest way to get involved is to submit
a pull request with your changes against the main repository's master branch.
Contributors
Code Contributors
This project exists thanks to all the people who contribute. [Contribute].
Financial Contributors
Become a financial contributor and help us sustain our community. [Contribute]
Individuals
Organizations
Support this project with your organization. Your logo will show up here with a link to your website. [Contribute]
License
Our license is based on the modified, 3-clause BSD-License.
An informal summary is: do whatever you want, but include Assimp's license text with your product -
and don't sue us if our code doesn't work. Note that, unlike LGPLed code, you may link statically to Assimp.
For the legal details, see the LICENSE file.
Why this name
Sorry, we're germans :-), no English native speakers ...
About
The official Open-Asset-Importer-Library Repository. Loads 40+ 3D-file-formats into one unified and clean data structure. 
www.assimp.org
Resources
Readme
License
Code of conduct
Code of conduct
Contributing
Contributing
Security policy
Security policy
Activity
Stars
0 stars
Watchers
0 watching
Forks
0 forks
Report repository
Releases
Packages
Contributors
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, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Remove or un-stick sticky/fixed headers that block content\n(function() {\n function unstick() {\n document.querySelectorAll('header, nav, [role=\"banner\"], .header, .navbar, .sticky, .fixed-top, [style*=\"position: fixed\"], [style*=\"position:sticky\"]').forEach(function(el) {\n if (el.style.position === 'fixed' || el.style.position === 'sticky' || \n getComputedStyle(el).position === 'fixed' || getComputedStyle(el).position === 'sticky') {\n el.style.position = 'static';\n el.style.top = 'auto';\n el.style.zIndex = 'auto';\n }\n });\n }\n \n unstick();\n \n var observer = new MutationObserver(unstick);\n observer.observe(document.body, { childList: true, subtree: true, attributes: true, attributeFilter: ['style', 'class'] });\n})();", "Kill Sticky Headers");
}
} catch(__e) { console.warn('[Userscript:Kill Sticky Headers]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

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Open Asset Import Library (assimp)
Open Asset Import Library is a library to load various 3d file formats into a shared, in-memory format. It supports more than 40 file formats for import and a growing selection of file formats for export.
Current project status
Financial Contributors on Open CollectiveC/C++ CICodacy BadgeJoin the chat at https://gitter.im/assimp/assimpAverage time to resolve an issuePercentage of issues still open
APIs are provided for C and C++. There are various bindings to other languages (C#, Java, Python, Delphi, D). Assimp also runs on Android and iOS.
Additionally, assimp features various mesh post-processing tools: normals and tangent space generation, triangulation, vertex cache locality optimization, removal of degenerate primitives and duplicate vertices, sorting by primitive type, merging of redundant materials and many more.
Documentation
Read our latest documentation.
Pre-built binaries
Download binaries from our Itchi Projectspace.
Test data
Clone our model database.
Communities
And we also have a Gitter-channel:Gitter Join the chat at https://gitter.im/assimp/assimp
Supported file formats
See the complete list of supported formats.
Building
Start by reading our build instructions. We are available in vcpkg, and our build system is CMake; if you used CMake before there is a good chance you know what to do.
Ports
Other tools
open3mod is a powerful 3D model viewer based on Assimp's import and export abilities.
Assimp-Viewer is an experimental implementation for an Asset-Viewer based on ImGUI and Assimp (experimental).
Repository structure
Open Asset Import Library is implemented in C++. The directory structure looks like this:
/code Source code
/contrib	Third-party libraries
/doc Documentation (doxysource and pre-compiled docs)
/fuzz Contains the test code for the Google Fuzzer project
/include	Public header C and C++ header files
/scripts Scripts are used to generate the loading code for some formats
/port Ports to other languages and scripts to maintain those.
/test Unit- and regression tests, test suite of models
/tools Tools (old assimp viewer, command line `assimp`)
/samples	A small number of samples to illustrate possible use cases for Assimp

The source code is organized in the following way:
code/Common The base implementation for importers and the infrastructure
code/CApi Special implementations which are only used for the C-API
code/Geometry A collection of geometry tools
code/Material The material system
code/PBR An exporter for physical-based models
code/PostProcessing The post-processing steps
code/AssetLib/<FormatName>	Implementation for import and export of the format

Contributing
Contributions to assimp are highly appreciated. The easiest way to get involved is to submit
a pull request with your changes against the main repository's master branch.
Contributors
Code Contributors
This project exists thanks to all the people who contribute. [Contribute].
Financial Contributors
Become a financial contributor and help us sustain our community. [Contribute]
Individuals
Organizations
Support this project with your organization. Your logo will show up here with a link to your website. [Contribute]
License
Our license is based on the modified, 3-clause BSD-License.
An informal summary is: do whatever you want, but include Assimp's license text with your product -
and don't sue us if our code doesn't work. Note that, unlike LGPLed code, you may link statically to Assimp.
For the legal details, see the LICENSE file.
Why this name
Sorry, we're germans :-), no English native speakers ...
About
The official Open-Asset-Importer-Library Repository. Loads 40+ 3D-file-formats into one unified and clean data structure. 
www.assimp.org
Resources
Readme
License
Code of conduct
Code of conduct
Contributing
Contributing
Security policy
Security policy
Activity
Stars
0 stars
Watchers
0 watching
Forks
0 forks
Report repository
Releases
Packages
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Universal Dark Mode - works on any site\n(function() {\n var enabled = true;\n \n function applyDarkMode() {\n if (!enabled) return;\n \n // Create style element if it doesn't exist\n var style = document.getElementById('universal-dark-mode-style');\n if (!style) {\n style = document.createElement('style');\n style.id = 'universal-dark-mode-style';\n document.head.appendChild(style);\n }\n \n // Dark mode CSS - inverts colors but preserves images/video\n style.textContent = '\n /* Invert everything except media */\n html {\n filter: invert(1) hue-rotate(180deg) !important;\n background: #1a1a2e !important;\n }\n \n /* Restore images, videos, iframes, canvas */\n img, video, iframe, canvas, svg, picture, [style*=\"background-image\"] {\n filter: invert(1) hue-rotate(180deg) !important;\n }\n \n /* Preserve specific elements that should not be inverted */\n .no-dark-mode, .no-dark-mode *,\n [data-theme=\"light\"], [data-theme=\"light\"],\n .ace_editor, .ace_editor *,\n .CodeMirror, .CodeMirror *,\n .monaco-editor, .monaco-editor *,\n .markdown-body pre, .markdown-body pre *,\n .highlight, .highlight *,\n pre code, pre code * {\n filter: none !important;\n }\n \n /* Fix common UI elements */\n .modal, .popup, .dropdown-menu, .tooltip, .popover {\n filter: invert(1) hue-rotate(180deg) !important;\n background: #2d2d44 !important;\n border-color: #444 !important;\n }\n \n /* Scrollbars */\n ::-webkit-scrollbar { background: #1a1a2e !important; }\n ::-webkit-scrollbar-thumb { background: #444 !important; }\n ::-webkit-scrollbar-thumb:hover { background: #555 !important; }\n \n /* Selection */\n ::selection { background: #4ecdc4 !important; color: #1a1a2e !important; }\n ::-moz-selection { background: #4ecdc4 !important; color: #1a1a2e !important; }\n ';\n }\n \n function removeDarkMode() {\n var style = document.getElementById('universal-dark-mode-style');\n if (style) style.remove();\n }\n \n // Toggle with Alt+Shift+D\n document.addEventListener('keydown', function(e) {\n if (e.altKey && e.shiftKey && e.key === 'D') {\n e.preventDefault();\n enabled = !enabled;\n if (enabled) {\n applyDarkMode();\n console.log('[Universal Dark Mode] Enabled');\n } else {\n removeDarkMode();\n console.log('[Universal Dark Mode] Disabled');\n }\n }\n });\n \n // Apply on load\n applyDarkMode();\n \n // Re-apply on dynamic content\n var observer = new MutationObserver(function(mutations) {\n if (enabled && !document.getElementById('universal-dark-mode-style')) {\n applyDarkMode();\n }\n });\n observer.observe(document.head, { childList: true });\n \n console.log('[Universal Dark Mode] Loaded - Press Alt+Shift+D to toggle');\n})();", "Universal Dark Mode");
}
} catch(__e) { console.warn('[Userscript:Universal Dark Mode]', __e); }
})();
})();

Skip to content
BranchesTags
Repository files navigation
Open Asset Import Library (assimp)
Open Asset Import Library is a library to load various 3d file formats into a shared, in-memory format. It supports more than 40 file formats for import and a growing selection of file formats for export.
Current project status
Financial Contributors on Open CollectiveC/C++ CICodacy BadgeJoin the chat at https://gitter.im/assimp/assimpAverage time to resolve an issuePercentage of issues still open
APIs are provided for C and C++. There are various bindings to other languages (C#, Java, Python, Delphi, D). Assimp also runs on Android and iOS.
Additionally, assimp features various mesh post-processing tools: normals and tangent space generation, triangulation, vertex cache locality optimization, removal of degenerate primitives and duplicate vertices, sorting by primitive type, merging of redundant materials and many more.
Documentation
Read our latest documentation.
Pre-built binaries
Download binaries from our Itchi Projectspace.
Test data
Clone our model database.
Communities
And we also have a Gitter-channel:Gitter Join the chat at https://gitter.im/assimp/assimp
Supported file formats
See the complete list of supported formats.
Building
Start by reading our build instructions. We are available in vcpkg, and our build system is CMake; if you used CMake before there is a good chance you know what to do.
Ports
Other tools
open3mod is a powerful 3D model viewer based on Assimp's import and export abilities.
Assimp-Viewer is an experimental implementation for an Asset-Viewer based on ImGUI and Assimp (experimental).
Repository structure
Open Asset Import Library is implemented in C++. The directory structure looks like this:
/code Source code
/contrib	Third-party libraries
/doc Documentation (doxysource and pre-compiled docs)
/fuzz Contains the test code for the Google Fuzzer project
/include	Public header C and C++ header files
/scripts Scripts are used to generate the loading code for some formats
/port Ports to other languages and scripts to maintain those.
/test Unit- and regression tests, test suite of models
/tools Tools (old assimp viewer, command line `assimp`)
/samples	A small number of samples to illustrate possible use cases for Assimp

The source code is organized in the following way:
code/Common The base implementation for importers and the infrastructure
code/CApi Special implementations which are only used for the C-API
code/Geometry A collection of geometry tools
code/Material The material system
code/PBR An exporter for physical-based models
code/PostProcessing The post-processing steps
code/AssetLib/<FormatName>	Implementation for import and export of the format

Contributing
Contributions to assimp are highly appreciated. The easiest way to get involved is to submit
a pull request with your changes against the main repository's master branch.
Contributors
Code Contributors
This project exists thanks to all the people who contribute. [Contribute].
Financial Contributors
Become a financial contributor and help us sustain our community. [Contribute]
Individuals
Organizations
Support this project with your organization. Your logo will show up here with a link to your website. [Contribute]
License
Our license is based on the modified, 3-clause BSD-License.
An informal summary is: do whatever you want, but include Assimp's license text with your product -
and don't sue us if our code doesn't work. Note that, unlike LGPLed code, you may link statically to Assimp.
For the legal details, see the LICENSE file.
Why this name
Sorry, we're germans :-), no English native speakers ...
About
The official Open-Asset-Importer-Library Repository. Loads 40+ 3D-file-formats into one unified and clean data structure. 
www.assimp.org
Resources
Readme
License
Code of conduct
Code of conduct
Contributing
Contributing
Security policy
Security policy
Activity
Stars
0 stars
Watchers
0 watching
Forks
0 forks
Report repository
Releases
Packages
Contributors
Languages