MTX_OrthoW

Syntax

#include <nitro/fx/fx_mtx44.h>
void MTX_OrthoW( fx32 t, fx32 b, fx32 l, fx32 r, fx32 n, fx32 f, fx32 scaleW, 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 viewpoint to the near clipping plane
f Distance from viewpoint to the far clipping plane
scaleW Precision adjustment parameter for the view volume
mtx Pointer to a 4x4 matrix.

Return Values

None.

Description

This sets an orthogonal projection matrix to matrix *mtx.
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 functions. The operation is not guaranteed if W-buffering is used, since the depth value is constant.

× scaleW

The divider is used internally. Refer to Divider Usage Notes when using this function inside an interrupt.

See Also

G3_OrthoW, MTX_Ortho,G3_Ortho,

Revision History

2004/06/21 Initial version.


CONFIDENTIAL