Practical Algorithms for 3D Computer Graphics, 2nd Edition

9.7. The Renderer module 359

completed the OpenGL color buffers (and the depth buffer) have to be copied

into the CPU buffers for writing to the outp u t files. This done in two of the

functions in the file “renergl.c”, CopyGLtoFSB() and CopyGLtoZdepth().

Irrespective of which output target is chosen, the scene is rendered from the

camera view in function RenderCameraView(...) in file “rendergl1.c”. As all

the vertices were transformed to match a camera located at (0, 0, 0) the s cen e

can be rendered without the need for any further transformations. However,

to be able to deliver an anti-aliased result, th e scene is drawn using a function

Draw3dScene()