#include <revolution/gx.h>void GXSetZScaleOffset( f32 scale, f32 offset );scale |
Specifies scale value for Z adjustment |
offset |
Specifies offset value for Z adjustment |
None.
This function sets scale and offset values that are applied to the depth value of each pixel before it is written into the Z buffer. The Z modification function is:
Zs' = Zs * scale + offset;
where Zs is the result value in screen-space after model-view, projection and viewport transformations.
This function internally adjusts the viewport setting to realize these scaling/offsetting. With this function, you can easily modify depth priorities for each primitive without changing the entire viewport.
The viewport depth parameters are normalized coordinates from 0.0f - 1.0f; thus, the offset value should be defined in the same manner.
03/01/2006 Initial version.