Antialiasing (cont)
Coverage values stored in alpha value
- Coverage values calculated in scan converter
Alpha Blending modes used to implement anti-aliasing
- lines, points: Src = GL_SRC_ALPHA, Dst=GL_ONE_MINUS_SRC_ALPHA
- polygons: Src = GL_SRC_ALPHA_SATURATE, Dst=GL_ONE
- Polygons must ordered front to back