shaders/water.fs

   1 out vec4 FragColor;
   2
   3 uniform sampler2D uTexMain;
   4 uniform sampler2D uTexDudv;
   5 uniform sampler2D uTexDepth;
   6 uniform vec2 uInvRes;
   7 uniform float uTime;
   8
   9 in vec4 aUv;
  10 in vec3 aCo;
  11
  12 void main()
  13 {
  14    vec2 ssuv = gl_FragCoord.xy*uInvRes;
  15    vec4 dudva = texture( uTexDudv, aUv.xy + vec2(uTime*0.04f,uTime*0.03f) );
  16    vec4 dudvb = texture( uTexDudv, aUv.xy - vec2(uTime*0.1,uTime*0.054) );
  17
  18    vec2 distortamt = (dudva.rg-0.5) * (dudvb.ba-0.5) * 2.0;
  19
  20    vec4 reflected = texture( uTexMain, ssuv+distortamt );
  21    float depthvalue = texture( uTexDepth, aUv.zw ).r;
  22    float opacity = smoothstep( 0.0, 0.1, depthvalue );
  23
  24    vec3 colour_shore = vec3( 0.96, 0.98, 0.9 );
  25    vec3 colour_ocean = vec3( 0.61, 0.84, 0.9 );
  26    vec3 surface_tint = mix( colour_shore, colour_ocean, depthvalue );
  27
  28    vec3 comp_surf = mix(pow(surface_tint,vec3(6.0))*0.6,reflected.rgb, 0.7);
  29
  30    float band = fract( aCo.z*0.1+uTime*0.1-depthvalue*10.0 );
  31    band = step( band + dudvb.g*0.8, 0.5 ) * max((1.0-depthvalue*4.0),0.0);
  32
  33    FragColor = vec4(comp_surf + band*0.2,opacity+band*0.2);
  34 }