shaders/cloud.vs

   1 layout (location=0) in vec4 a_co;
   2 layout (location=1) in vec4 a_norm;
   3 layout (location=2) in vec4 a_colour;
   4
   5 #include "motion_vectors_vs.glsl"
   6
   7 uniform mat4x3 uMdl;
   8 uniform mat3 uNormMtx;
   9 uniform mat4 uPv;
  10 uniform mat4 uPvmPrev;
  11 uniform vec2 uTime;
  12 uniform vec4 uTransform;
  13
  14 out vec4 aColour;
  15 out vec3 aNorm;
  16 out vec3 aWorldCo;
  17 out vec3 aCo;
  18
  19 vec2 rand_hash22( vec2 p )
  20 {
  21    vec3 p3 = fract(vec3(p.xyx) * 213.8976123);
  22    p3 += dot(p3, p3.yzx+19.19);
  23    return fract(vec2((p3.x + p3.y)*p3.z, (p3.x+p3.z)*p3.y));
  24 }
  25
  26 vec3 mapP( vec3 p )
  27 {
  28    return p;
  29    float t = max(0.0,uTime.y);
  30
  31    vec3 lco = p * 20.0;
  32    vec3 grid = vec3(floor(lco.x),lco.y,floor(lco.z));//fract(p);
  33
  34    return mix(p,grid * (1.0/20.0), t)*vec3(1.0+t,1.0-t,1.0+t);
  35 }
  36
  37 void main()
  38 {
  39    vec3 mco = a_co.xyz * uTransform.w + uTransform.xyz;
  40
  41
  42    vec3 center = vec3(0.5);
  43    vec3 lco = mapP(mco-center);
  44    mco = lco + center;
  45
  46    vec3 world_pos0 = uMdl     * vec4( mco, 1.0 );
  47    vec4 vproj0     = uPv      * vec4( world_pos0, 1.0 );
  48    vec4 vproj1     = uPvmPrev * vec4( mco, 1.0 );
  49
  50    float t = max(0.0,uTime.y);
  51    float scaler = smoothstep(0.6,0.58,length(lco.xz*vec2(0.7,1.0)));
  52
  53    vs_motion_out( vproj0, vproj1 );
  54
  55    gl_Position = vproj0;
  56    gl_PointSize = (8.0*uTransform.w*scaler) / (gl_Position.z + 0.01);
  57    aWorldCo = world_pos0;
  58    aColour = a_colour*scaler*(0.3+a_co.y)+pow(1.0-a_co.y,16.0);
  59    aCo = mco;
  60    aNorm = uNormMtx * a_norm.xyz;
  61 }