shaders/scene_terrain.fs

   1 uniform sampler2D uTexGarbage;
   2 uniform sampler2D uTexGradients;
   3 uniform vec3 uCamera;
   4 uniform vec3 uSandColour;
   5 uniform vec2 uBlendOffset;
   6
   7 #include "light_clearskies_stddef.glsl"
   8 #include "common_scene.glsl"
   9 #include "motion_vectors_fs.glsl"
  10
  11 void main()
  12 {
  13    compute_motion_vectors();
  14
  15    // Colour
  16    // ------
  17    vec3 vfrag = vec3(0.5,0.5,0.5);
  18
  19    // ws modulation
  20    vec4 wgarbage = texture( uTexGarbage, aCo.xz * 0.015 );
  21
  22    // Creating normal patches
  23    vec3 modnorm = (wgarbage.rgb-0.4) * 1.4;
  24    vec3 qnorm = normalize(floor(aNorm.xyz*4.0+modnorm)*0.25);
  25    qnorm += vec3(0.001,0.0,0.0);
  26
  27    vec2 dir = normalize(qnorm.xz);
  28    vec2 uvdiffuse = aCo.xz * 0.02;
  29    uvdiffuse = mat2(dir.y, dir.x, -dir.x, dir.y) * uvdiffuse;
  30
  31    // Patch local noise
  32    vec4 rgarbage = texture( uTexGarbage, uvdiffuse );
  33
  34    // Colour blending
  35    float amtgrass = step(qnorm.y,0.6);
  36    float amtsand = clamp( max((aCo.y - 10.0) * -0.1,0.0)*qnorm.y, 0.0, 1.0 );
  37    vec2 uvgradients = aUv + vec2( amtgrass + rgarbage.a*0.8 )*uBlendOffset;
  38    vfrag = texture( uTexGradients, uvgradients ).rgb;
  39    vfrag = mix( vfrag, uSandColour, amtsand );
  40    qnorm = mix( qnorm, aNorm.xyz, amtsand );
  41
  42    if( g_light_preview == 1 )
  43    {
  44       vfrag = vec3(0.5);
  45    }
  46
  47    vfrag = scene_compute_lighting( vfrag, qnorm, aWorldCo );
  48    oColour = vec4(vfrag, 1.0);
  49 }