shaders

assortment of fragment shaders.
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silexsargs.frag (611B)

      1 // http://www.pouet.net/prod.php?which=57245
      2 // If you intend to reuse this shader, please add credits to 'Danilo Guanabara'
      3 
      4 uniform float u_time;
      5 uniform vec2 u_resolution;
      6 
      7 void main() {
      8     vec3 c;
      9     float l, z = u_time;
     10 
     11     for(int i = 0; i < 3; i++) {
     12         vec2 uv, p = gl_FragCoord.xy / u_resolution;
     13         uv = p;
     14         p -= .5;
     15         p.x *= u_resolution.x / u_resolution.y;
     16         z += .07;
     17         l = length(p);
     18 	l *= l;
     19         uv += p / l * (sin(z) + 1.) * abs(sin(l * 9. - z * 2.));
     20         c[i] = .01 / length(abs(mod(uv, 1.) - .5));
     21     }
     22 
     23     gl_FragColor = vec4(c / l, u_time);
     24 }