How to debug a GLSL shader?
Posted skyman_2001
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摘自:http://stackoverflow.com/questions/2508818/how-to-debug-a-glsl-shader
void main()
float bug=0.0;
vec3 tile=texture2D(colMap, coords.st).xyz;
vec4 col=vec4(tile, 1.0);
if(something) bug=1.0;
col.x+=bug;
gl_FragColor=col;
It is a debugging device. If you want to know where the light position is in the scene, for example, go: if(lpos.x>100) bug=1.0. If the light position is greater than 100, the scene will turn red.– ste3e
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