MTX_Ortho


C Specification

#include <nitro/fx/fx_mtx44.h>
void MTX_Ortho( fx32 t, fx32 b, fx32 l, fx32 r, fx32 n, fx32 f, MtxFx44* mtx );

Description

This function sets an orthogonal projection matrix to *mtx. It uses the Divider. The diagram shows the matrix that is set.

(Caution) If you set an orthogonal projection, you must use G3*_SwapBuffers to select Z buffering. W buffering will not function properly because the depth value will always be fixed.

Arguments

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 the eyepoint to the near clipping plane
f Distance from the eyepoint to the far clipping plane
mtx Pointer to a 4x4 matrix

Return Values

None

See Also

G3_Ortho, MTX_Frustum, MTX_Perspective

Revision History

04/27/2004 Initial Version