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 );

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 eyepoint to the near clip plane
f Distance from eyepoint to the far clip plane
mtx The pointer to a 4x4 matrix.

Return Values

None.

Description

*This function sets an orthogonal projection matrix to *mtx. It 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.

See Also

G3_Ortho, MTX_Frustum, MTX_Perspective

Revision History

04/27/2004 Initial version