P
gluPerspective
Chapter 14
322
Notes
Depth buffer precision is affected by the values specified for zNear and zFar. The greater
the ratio of zFar to zNear is, the less effective the depth buffer will be at distinguishing
between surfaces that are near each other. If r = zFar / zNear, roughly log
2
r bits of
depth buffer precision are lost. Because r approaches infinity as zNear approaches 0,
zNear must never be set to 0.
See Also
glFrustum,
glLoadIdentity,
glMultMatrix,
gluOrtho2D
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