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<root>/parties/2014/tokyodemofest14/7_lines_glsl_graphics_compo/fakeaobench-ao-kun.txt
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- 582 bytes (582B)
- File date:
- 2014-04-06 23:04:12
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#ifdef GL_ES precision mediump float; #endif uniform vec2 resolution;float h(vec3 p, vec4 r){return length(r.xyz-p)-r.w;} float s(vec3 p){return min(min(min((4.+p.y),h(p,vec4(0,-2,20,2))),h(p,vec4(-7, -2,25,2))),h(p,vec4(7,-2,15,2)));}vec4 x(vec3 dir){vec3 p=vec3(0),e=vec3(.001, 0,0);dir.y*=.5;for(int i=0;i<84;i++)p+=s(p)*dir;vec3 n=normalize(vec3(s(p)-s(p -e.xyy),s(p+e.yxy)-s(p),s(p)-s(p-e.yyx)));float a,d=2.5,o;for(int i=0;i<8;i++) {o+=(float(i)-s(p+n*float(i)))/d;d*=2.;}a=.9-o;a*=a;return vec4(a,a,a,1);}void main(){gl_FragColor=x(vec3(gl_FragCoord.xy/resolution*2.-1.,1));}