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Zhu3D is an interactive OpenGL-based mathematical function viewer. You can visualize functions, parametric systems and isosurfaces. The viewer supports special effects like animation, morphing, transparency, textures, fog and motion blur.
Solid is a library for collision detection of three-dimensional objects undergoing rigid motion and deformation. Solid is designed to be used in interactive 3D graphics applications using a VRML-like scene graph.