shaders/sky.fs

   1 out vec4 FragColor;
   2
   3 uniform vec4 uColour;
   4 uniform sampler2D uTexGarbage;
   5 uniform float uTime;
   6
   7 in vec4 aColour;
   8 in vec2 aUv;
   9 in vec3 aNorm;
  10 in vec3 aCo;
  11
  12 void main()
  13 {
  14    float fintensity = 1.0-(abs(aNorm.y)*0.7);
  15    float angle = -dot(vec3(0.95,0.0,-0.3),aNorm)*0.5+0.5;
  16    float fblend = pow(fintensity,6.0) * angle;
  17    vec3 horizon = vec3(0.9,0.9,0.8);
  18    vec3 skycolour = vec3(0.4,0.5,0.8);
  19    vec3 diffuse = mix( skycolour, horizon, fblend );
  20
  21    float fmove = uTime * 0.001;
  22    vec2 cloudplane = (aCo.xz / (aCo.y*sign(aNorm.y))) * 0.03;
  23    vec4 clouds1 = texture( uTexGarbage, cloudplane + vec2(0.1,0.4)*fmove*2.0 );
  24    vec4 clouds2 = texture( uTexGarbage, cloudplane + vec2(0.3,0.1)*fmove );
  25
  26    float cloud_d = max(clouds1.b*clouds2.r -0.2 - clouds2.g*0.4,0.0);
  27    float cloud_e = pow(cloud_d,1.8)*pow(abs(aNorm.y),0.3)*2.0;
  28
  29    vec3 colour_ocean = vec3( 0.61, 0.84, 0.9 );
  30    float fhorizon = step( aNorm.y * 0.5 + 0.5, 0.5 );
  31
  32    vec3 skycomp = mix(diffuse, vec3(1.0), cloud_e);
  33    skycomp = mix(mix(pow(colour_ocean,vec3(6.0))*0.6,skycomp, 0.7),skycomp,fhorizon);
  34
  35    FragColor = vec4(skycomp, 1.0);
  36 }