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Official Open Asset Import Library Repository. Loads 40+ 3D file formats into one unified and clean data structure.
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fix creation of unused mesh instance.

Signed-off-by: Kim Kulling <>
latest commit 45cc0b582a
@kimkulling kimkulling authored
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cmake-modules Replace cppunit with the googletest framework
code fix creation of unused mesh instance.
contrib openddlparser: latest greatest ( contains fix for correct handling of…
doc Update doxygen documentation. Drop custom stylesheet.
include/assimp gcc_struct, old fish, but reinterpreted: 92f4c84
packaging # fix critical bug in the zip release script that caused the lib file…
port jni header update due new function
samples Define CMAKE_DEBUG_POSTFIX and use it instead of ASSIMP_DEBUG_PREFIX
scripts update script to include workaround for reading blende…
test Update regression database (again).
tools CompareDump: do not use C++11 range based for loop.
workspaces finishing.
.gitignore - update gitignore file.
.travis.yml work finished, feel free to commit/cherry-pick Feature : Prepare FindPackage feature. Feature : Prepare FindPackage feature. - CMake overhaul. Add proper FindXXX scripts for PkgMacros, ZLIB, Dir…
CHANGES Forgot to mention Ogre skeleton format in CHANGES
CMakeLists.txt add openddl_parser directly to assimp.
CREDITS Add ExportProperties
CodeConventions.txt update : add initial code convention file.
INSTALL - merge 3.0 up to r1281 in trunk
LICENSE - merge 3.0 up to r1281 in trunk
README Deprecate README Update fixed the broken cmake config files (assimp-cmake), adding version su… Fix Visual Studio prefixes Add static libs to Libs.private Fixed bug during compilation with mingw & improved git revision suppo…

Open Asset Import Library (assimp)

Open Asset Import Library is a Open Source library designed to load various 3d file formats and convert them into a shared, in-memory format. It supports more than 40 file formats for import and a growing selection of file formats for export. Additionally, assimp features various post processing tools to refine the imported data: 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.

This is the development trunk of assimp containing the latest features and bugfixes. For productive use though, we recommend one of the stable releases available from or from *nix package repositories. According to Travis-CI, the current build status of the trunk is Build Status

open3mod is an Open Source 3D model viewer based off Assimp's import and export abilities.

Supported file formats

The library provides importers for a lot of file formats, including:

  • 3DS
  • BLEND (Blender 3D)
  • DAE/Collada
  • FBX
  • ASE
  • DXF
  • HMP
  • MD2
  • MD3
  • MD5
  • MDC
  • MDL
  • NFF
  • PLY
  • STL
  • X
  • OBJ
  • SMD
  • LWO
  • LXO
  • LWS
  • TER
  • AC3D
  • MS3D
  • COB
  • Q3BSP
  • XGL
  • CSM
  • BVH
  • B3D
  • NDO
  • Ogre Binary
  • Ogre XML
  • Q3D
  • ASSBIN (Assimp scene serialization)

Additionally, the following formats are also supported, but not part of the core library as they depend on proprietary libraries.

Exporters include:

See the full list here.

Repository structure

Open Asset Import Library is implemented in C++ (but provides both a C and a C++ish interface). The directory structure is:

/bin        Folder for binaries, only used on Windows
/code       Source code
/contrib    Third-party libraries
/doc        Documentation (doxysource and pre-compiled docs)
/include    Public header C and C++ header files
/lib        Static library location for Windows
/obj        Object file location for Windows
/scripts    Scripts 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
/workspaces Build enviroments for vc,xcode,... (deprecated,
        CMake has superseeded all legacy build options!)


Take a look into the INSTALL file. Our build system is CMake, if you already used CMake before there is a good chance you know what to do.

Where to get help

For more information, visit our website. Or check out the ./doc- folder, which contains the official documentation in HTML format. (CHMs for Windows are included in some release packages and should be located right here in the root folder).

If the documentation doesn't solve your problems, try our forums at or ask on StackOverflow.

For development discussions, there is also a mailing list, assimp-discussions (subscribe here)


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.


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

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.

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