shaders/vg/water.fs.glsl

   1 out vec4 FragColor;
   2
   3 uniform sampler2D uTexMain;
   4 uniform sampler2D uTexDudv;
   5 uniform vec2 uInvRes;
   6 uniform float uTime;
   7
   8 in vec2 aUv;
   9
  10 void main()
  11 {
  12    vec2 ssuv = gl_FragCoord.xy*uInvRes;
  13    vec4 dudva = texture( uTexDudv, aUv + vec2(uTime*0.04f,uTime*0.03f) );
  14    vec4 dudvb = texture( uTexDudv, aUv - vec2(uTime*0.1,uTime*0.054) );
  15
  16    vec2 distortamt = (dudva.rg-0.5) * (dudvb.ba-0.5) * 2.0;
  17
  18    vec4 reflected = texture( uTexMain, ssuv+distortamt );
  19    FragColor = vec4(reflected.rgb*1.0,reflected.a);
  20 }