var KERNEL_SIZE=2;

var KERNEL_LOOP=KERNEL_SIZE/2-0.5;

var KERNEL_CONTRIBUTIONS=KERNEL_SIZE*KERNEL_SIZE;

//#GLSLSource

pub.buildShader=function(features) {

var shadowMapSampler = "\n"+

"const float shadowTexelSize=1.0/2048.0;\n"+

//When dot-producted with the packed values in the shadow map will produce a Z value in the range 0-1

"const vec4 bitShifts=vec4(1.0/(256.0*256.0*256.0),1.0/(256.0*256.0),1.0/256.0,1.0);\n"+

"float rand(vec2 co){\n"+

" return fract(sin(dot(co.xy,vec2(12.9898,78.233)))*43758.5453);\n"+

"}\n"+

"float ShadowMapSamplerStochastic(vec4 sunShadowMapPosition, sampler2D sunShadowMap, float shadowStrength) {\n"+

" float shadowEffect;\n"+

" vec3 shadowMapTexel=sunShadowMapPosition.xyz/sunShadowMapPosition.w;\n"+

" shadowMapTexel.z-=shadowMapTexel.z*0.003;\n"+

" if (shadowMapTexel.x<0.0 || shadowMapTexel.x>1.0 || shadowMapTexel.y<0.0 || shadowMapTexel.y>1.0 || shadowMapTexel.z<0.0 || shadowMapTexel.z>0.45) shadowEffect=1.0;\n"+

" else {\n"+

" float shadowTotal=0.0, shadowMapDepth=0.0;\n"+

" vec2 lookupTexel;\n";

for (var pixelX=-KERNEL_LOOP; pixelX<=KERNEL_LOOP; pixelX+=1.0) {

for (var pixelY=-KERNEL_LOOP; pixelY<=KERNEL_LOOP; pixelY+=1.0) {

shadowMapSampler +=

" lookupTexel=shadowMapTexel.xy+shadowTexelSize*( vec2(cos(rand(sunShadowMapPosition.xy))+("+pixelX+"),sin(rand(sunShadowMapPosition.yx))+("+pixelY+")) );\n"+

" shadowMapDepth=dot(texture2D(sunShadowMap,lookupTexel),bitShifts);\n"+

" shadowTotal+=step(shadowMapDepth,shadowMapTexel.z)*shadowStrength;\n";

}

}

shadowMapSampler +=

" shadowEffect=max(1.0-(shadowTotal/"+KERNEL_CONTRIBUTIONS+".0),0.0);\n"+

" }\n"+

" return shadowEffect;\n"+

"}\n"+

};

Where did you find this :P?

Will this help scripters or something?

Care to explain exactly what this is?

I'm seeing the word shadow a lot, seems to just be something about shadows on models or something like that, graphics related.

Seems to be some OpenGL/WebGL stuff.

 

Beats me though.

 

 

https://paste.bugabuse.net/view/1a326f37

Edited September 6, 201312 yr by YoHoJo