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3D Game Engine Design, 2nd Edition
book

3D Game Engine Design, 2nd Edition

by David Eberly
November 2006
Intermediate to advanced content levelIntermediate to advanced
1040 pages
26h 31m
English
CRC Press
Content preview from 3D Game Engine Design, 2nd Edition
152 Chapter 3 Renderers
In most circumstances, you want back-face culling to occur. If it is disabled, then
you proceed immediately to the clipping stage. If culling is enabled, the default is to
eliminate back-facing triangles. However, there are some special effects that require
front-facing triangles to be culled. For example, planar reflections need this because
the object has counterclockwise-ordered triangles to be back-face culled, but the
object’s reflection has, effectively, clockwise-ordered triangles. The
CullState class
allows you to select how you want culling to occur, if at all.
Assuming the default is back-face culling, let the triangle vertices be (r
i
, u
i
, d
i
,
w
i
),0 i 2, which are the clip-space coordinates of the transformed
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Publisher Resources

ISBN: 9781482267303