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gluOrtho2D - define a 2D orthographic projection matrix
void
gluOrtho2D( GLdouble left,
GLdouble right,
GLdouble bottom,
GLdouble top )
eqn not supported
- left, right
- Specify the coordinates for the
left and right vertical clipping planes.
- bottom, top
- Specify the coordinates
for the bottom and top horizontal clipping planes.
gluOrtho2D
sets up a two-dimensional orthographic viewing region. This is equivalent
to calling glOrtho with $ near ~=~ -1 $ and $ far ~=~ 1 $.
glOrtho(3G)
,
gluPerspective(3G)
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