I3D Graphics / Virtual Reality Engine

This is a 3D Graphics / Virtual Reality Engine called I3D. It does have some very complex/complicated routines built in, but MOST are easily understandable. This engine is very useful and functional and has powerful mesh controlling routines. It has the ability to load .3DS models, .X files, and .MDL models. It has such features as billboarding(makes texture constantly face user head-on), texture loading, terrain loading, light object creation, collision detection, camera/viewport controls, etc... It has many, many routines for matrix/vector/quaternion math. This 3D engine is even equiped with a particle system.