A software reimplementation of a subset of the OpenGL 1.2 API. The early OpenGLs were based on a Fixed Function Pipeline which is replicated in this library. The library performs depth buffer based rendering and supports a some basic functionality:
- 2D textures - Perspective correct texturing using barycentric coordinate interpolation.
- Bilinear filtering - Perfomed both for minification and magnification. No mip-mapping yet.
- Smooth shading - Currently forced on as it keeps the code a bit simpler.
- Vertex lighting - Calculates ambient diffuse and specular contribution from point light sources at individual vertices and interpolates between them on pixel level.
- Vertex fog - Calculates fog contribution at individual vertices and interpolates between them on pixel level.
- Frustum clipping - Triangles are clipped at view frustum edges and split into new triangles to avoid per-pixel calculations outside view rectangle.
To prove to myself I can read the OpenGL spec fully understand it and if need be, implement it. Project started in 2004 and has only occasionally been tinkered with since.
For convenience I have started using some of my other libraries:
- SCFObjectExtensions - Used to work with texture memory, though the library itself contains a lot more functionality.
- SCFMathematics - Used for vector and 3D math.
- SCFImaging - Used to load images in the test app.
- SCFTimer - Used to work with high precision timers to simulate in-game passage of time.
I have made a simple test app allowing me to test out the various features.
