src/data/shaders/noisyquads.vert

   1 /* This is free and unencumbered software released into the public
   2    domain. To the extent possible under law, the author of this file
   3    waives all copyright and related or neighboring rights to it.
   4 */
   5
   6 precision mediump float;
   7
   8 attribute vec3 position;
   9 attribute vec2 texCoord;
  10 attribute vec4 color;
  11
  12 uniform mat4 model;
  13 uniform mat4 view;
  14 uniform mat4 projection;
  15
  16 uniform float cut;
  17 uniform float range;
  18
  19 varying vec4 fColor;
  20
  21 void main(void) {
  22     gl_Position = projection * view * model * vec4(position, 1.0);
  23     vec2 n = vec2(texCoord.x, cut);
  24     float p = 1.0 - range * abs(snoise(n));
  25     fColor = vec4(p * color.rgb, color.a);
  26 }