# Third-party dependencies and license info¶

While Panda3D itself uses the Modified BSD license, it brings together many third-party libraries released under different licenses. This page provides information on the different libraries and their licenses. Panda3D builds with some of these libraries by default, however, some of them are linked only into plug-ins that can be easily removed from the distribution.

## Disclaimer¶

Panda3D takes no responsibility for any act committed using the information presented here. For legal advice, it is recommended to consult a lawyer.

## Building Panda3D¶

When building Panda3D yourself on your computer you’ll notice that makepanda.py looks up if you have some libraries installed. On operating systems with a packaging system, like most GNU/Linux distros have, you’ll most likely find all dependencies as packages in the official repositories. Otherwise you have to take care of the libraries yourself.

Here you have a list of all third party libraries Panda3D must or can be compiled against. All of them are optional, but some features of Panda3D depend on certain libraries being available; omitting certain libraries will omit the corresponding features from Panda3D.

## Optional¶

### Assimp¶

http://www.assimp.org/

As of Panda3D 1.10.0, Panda3D can make use of the Open Asset Import (Assimp) library to read in additional 3D file formats. File formats supported by Assimp can be found here.

### Opus¶

https://opus-codec.org

As of Panda3D 1.10.0, Panda3D can make use of the libopusfile library to read .opus audio files. This is a higher-quality alternative to lossy formats such as .ogg and .mp3 that is not restricted by patents.

Patent note: Must agree not to litigate against other Opus users.

### FFMPEG¶

http://ffmpeg.org

Library for video and audio. Required to load and play video textures. As of Panda3D 1.9.0, libp3ffmpeg.dll is an optional module that can be easily removed, and is no longer required for .ogg and .wav files.

Patent note: using MP3 files and other formats may require you to pay royalty fees. Please use .ogg or .opus instead.

### FMOD Ex¶

https://www.fmod.com/

FMOD Ex is a proprietary audio library that supports various effects and surround sound. You must have one of FMOD or OpenAL to build support for Panda’s sound interfaces. (However, you can use external sound libraries such as pygame, even without these two.)

License note: Non-commercial distribution costs nothing. Commercial distribution costs between US$100 and US$6000 depending on FMOD licensing option.

### Bullet Physics¶

https://pybullet.org

Physics Library.

### PhysX¶

https://developer.nvidia.com/gameworks-physx-overview

NVIDIA physics library. The Panda3D PhysX support is deprecated.

### Open Dynamics Engine (ODE)¶

https://www.ode.org

One of the most versatile, free physics engines.

### OpenGL ES¶

https://www.khronos.org/opengles/

OpenGL for embedded systems: GLES (https://www.khronos.org/registry/OpenGL/index_es.php), EGL (https://www.khronos.org/registry/EGL/) libraries.

### 3ds Max SDK¶

https://www.autodesk.com/products/3ds-max/overview

Used to create exporters for Autodesk 3ds Max.

### Maya SDK¶

https://www.autodesk.com/products/maya/overview

The necessary libraries are part of the Maya installation. From Maya 2016.5 onward, the headers are also part of the Maya installation; before, they were provided separately as part of a “devkit”.

Used to create exporters for Maya.

### speedtree¶

https://store.speedtree.com/

Library for rendering trees.

### libRocket¶

https://github.com/libRocket/libRocket

C++ user interface middleware package based on the HTML and CSS standards. Panda3D’s libRocket bindings are deprecated.

### OpenCV¶

https://opencv.org/

An alternate library that provides support for video textures and webcam, similar to FFMPEG. This is only really useful on macOS, where this is the only way to get support for webcam input.

FCollada is an open-source C++ library which offers support for COLLADA interoperability, used for dae2egg and for loading dae files directly into Panda.

Use of FCollada in Panda is deprecated.

### FFTW2¶

http://www.fftw.org

Fast Fourier Transforms library for lossy animation compression in bam files. Compressed animation files may be as small as 10% of the uncompressed animation, but this is only an on-disk and/or download savings.

Use of fftw in Panda is deprecated. We do not recommend using it in new projects and we recommend converting existing compressed animations to lossless format.

License note: To distribute under a proprietary license, GPL must not be used, and FFTW proprietary license must be purchased.

### ARToolKit¶

http://www.hitl.washington.edu/artoolkit/

A library for augmented reality. It makes possible detecting 3D planes in live webcam video streams and applying 3D geometry to those, for integrating 3D graphics with a live video feed.

License note: To distribute under a proprietary license, GPL must not be used, and ARToolKit proprietary license must be purchased.

### VRPN¶

https://github.com/vrpn/vrpn/wiki

Virtual-Reality Peripheral Network, for using a range of different types of trackers and controllers with Panda3D.

License: as of July 22, 2010, future versions of VRPN (versions 7.27 and higher) are being released under the Boost Software License 1.0

Prior versions were released into the public domain.

## Build Tools (for compilation only)¶

### Bison¶

http://www.gnu.org/software/bison/

General-purpose parser generator.

### Flex¶

http://flex.sourceforge.net/

The Fast Lexical Analyzer.

## Patent Restriction Issues¶

### MP3¶

MPEG-1 Audio Layer 3 (MP3), while commonly used and since 2017 with expired patent and licensing, is recommended against. More modern and better suited audio encodings have been developed and should be used instead.

### MPEG¶

Other MPEG related formats are restricted by patents as well. Finding the prices of licenses for these formats is not even as easy as it was with MP3.