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
gpu_set_zfunc(cmp_func);
参数 描述 cmp_func The comparison mode to use (see list above)
N/A（无返回值）
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.