gpu_set_zfunc

This function can be used to set the z-buffer testing comparison mode (see gpu_set_ztestenable() for more information). The values available for use are any of the following constants (the default value is cmpfunc_lessequal):

• cmpfunc_never
• cmpfunc_less
• cmpfunc_equal
• cmpfunc_lessequal
• cmpfunc_greater
• cmpfunc_notequal
• cmpfunc_greaterequal
• cmpfunc_always

Syntax:

gpu_set_zfunc(cmp_func);

Returns:

N/A

Example:

gpu_set_ztestenable(true);
gpu_set_zfunc(cmpfunc_always);
draw_sprite(spr_Background, 0, 0, 0);
gpu_set_ztestenable(false);

The above code switches on z-buffer testing and sets its comparison mode before drawing a background sprite and then switches it back off again to continue drawing.