#if 0 > 0
vec4 plane;
#if 0 < 0
bool clipped = true;
if ( clipped ) discard;
#endif
#endif
In the fragment shader,i find some code ‘0>0’,what is it use for used for?
#if 0 > 0
vec4 plane;
#if 0 < 0
bool clipped = true;
if ( clipped ) discard;
#endif
#endif
In the fragment shader,i find some code ‘0>0’,what is it use for used for?
Where did you find this code?
Looks like maybe it was compiled in some way and the first zero replaced a variable.
when i render sprite object,i get fragment shader code,’#if 0 > 0’ is in the code
You can find that part of the code in the clipping planes shader chunk. Basically, if you’re not using clipping planes, then the renderer transforms NUM_CLIPPING_PLANES
to 0
and you get the result #if 0 > 0
so the GPU can skip that segment. It’s a nice shortcut to avoid making calculations that you don’t need. It’s also used with lights, shadows, and all kinds of material features that can be turned on/off.
If you were to use one clipping plane, then you’d get #if 1 > 0
and the code within would execute.
#if 0 > 0
personally, I think this is the head of a bird
thank you for your answer,i get i want from it