shaders/terrain.fs

   1 out vec4 FragColor;
   2
   3 uniform sampler2D uTexGarbage;
   4 uniform sampler2D uTexGradients;
   5
   6 in vec4 aColour;
   7 in vec2 aUv;
   8 in vec3 aNorm;
   9 in vec3 aCo;
  10
  11 void main()
  12 {
  13    vec4 wgarbage = texture( uTexGarbage, aCo.xz * 0.015 );
  14    vec3 modnorm = (wgarbage.rgb-0.4) * 1.4;
  15    vec3 qnorm = floor(aNorm*4.0+modnorm) * 0.25;
  16
  17    vec2 dir = normalize(qnorm.xz);
  18    vec2 uvdiffuse = aCo.xz * 0.02;
  19    uvdiffuse = mat2(dir.y, dir.x, -dir.x, dir.y) * uvdiffuse;
  20
  21    vec4 rgarbage = texture( uTexGarbage, uvdiffuse );
  22    float amtgrass = step(qnorm.y,0.6);
  23    vec2 uvgradients = vec2( rgarbage.a, -amtgrass*0.125 ) + aUv;
  24    vec3 diffuse = texture( uTexGradients, uvgradients ).rgb;
  25
  26    vec3 shadow = pow(vec3(0.014,0.034,0.084),vec3(1.0/3.2));
  27    float light1 = 1.0-(dot( vec3(0.95,0.0,-0.3), qnorm )*0.5+0.5);
  28
  29    FragColor = vec4(diffuse*(1.0-light1)+diffuse*shadow*light1, 1.0);
  30 }