shaders/blitblur.fs

   1 out vec4 FragColor;
   2 uniform sampler2D uTexMain;
   3
   4 in vec2 aUv;
   5
   6 vec2 rand_hash22( vec2 p )
   7 {
   8    vec3 p3 = fract(vec3(p.xyx) * 213.8976123);
   9    p3 += dot(p3, p3.yzx+19.19);
  10    return fract(vec2((p3.x + p3.y)*p3.z, (p3.x+p3.z)*p3.y));
  11 }
  12
  13 void main()
  14 {
  15    vec2 voffset = rand_hash22( aUv );
  16
  17    float bamt = abs(aUv.x-0.5)*2.0;
  18    bamt = pow(bamt,4.0)*0.05;
  19
  20    FragColor = texture( uTexMain, aUv + voffset*bamt );
  21 }