#include <nitro/gx/g3_util.h>
void G3_Ortho( fx32 t, fx32 b, fx32 l, fx32 r, fx32 n, fx32 f, MtxFx44 * mtx );
t | Y coordinate at the top of the near clipping plane |
b |
Y coordinate at the bottom of the near clipping plane |
l | X coordinate at the left of the near clipping plane |
r | X coordinate at the right of the near clipping plane |
n | Distance from eyepoint to the near clip plane |
f | Distance from eyepoint to the far clip plane |
mtx | The pointer to a 4x4 matrix. |
None.
This function sets the Matrix mode to the Projection mode. This function also sets the Orthogonal Projection matrix as the current matrix. If mtx
is not NULL
, then the Orthogonal Projection matrix is also set in *mtx
. This function uses the Divider. The diagram shows the matrix that is set.
Note: When setting the matrix for an orthogonal projection, it will be necessary to select Z-buffering with the G3*_SwapBuffers
. W buffering will not function properly because the depth value will always be fixed.
G3_OrthoW, G3_Frustum, G3_Perspective
02/09/2004
01/19/2004 Initial version