shaders/cloud.vs

   1 layout (location=0) in vec4 a_co;
   2 layout (location=1) in vec4 a_colour;
   3
   4 #include "motion_vectors_vs.glsl"
   5
   6 uniform mat4x3 uMdl;
   7 uniform mat3 uNormMtx;
   8 uniform mat4 uPv;
   9 uniform mat4 uPvmPrev;
  10 uniform vec2 uTime;
  11 uniform vec4 uTransform;
  12
  13 out vec4 aColour;
  14 out vec3 aWorldCo;
  15 out vec3 aCo;
  16
  17 vec2 rand_hash22( vec2 p )
  18 {
  19    vec3 p3 = fract(vec3(p.xyx) * 213.8976123);
  20    p3 += dot(p3, p3.yzx+19.19);
  21    return fract(vec2((p3.x + p3.y)*p3.z, (p3.x+p3.z)*p3.y));
  22 }
  23
  24 vec3 mapP( vec3 p )
  25 {
  26    return p;
  27    float t = max(0.0,uTime.y);
  28
  29    vec3 lco = p * 20.0;
  30    vec3 grid = vec3(floor(lco.x),lco.y,floor(lco.z));//fract(p);
  31
  32    return mix(p,grid * (1.0/20.0), t)*vec3(1.0+t,1.0-t,1.0+t);
  33 }
  34
  35 void main()
  36 {
  37    vec3 mco = a_co.xyz * uTransform.w + uTransform.xyz;
  38
  39
  40    vec3 center = vec3(0.5);
  41    vec3 lco = mapP(mco);
  42
  43    vec3 world_pos0 = uMdl     * vec4( mco, 1.0 );
  44    vec4 vproj0     = uPv      * vec4( world_pos0, 1.0 );
  45    vec4 vproj1     = uPvmPrev * vec4( mco, 1.0 );
  46
  47    float t = max(0.0,uTime.y);
  48    float scaler = smoothstep(0.6,0.58,length(lco.xz));
  49
  50    vs_motion_out( vproj0, vproj1 );
  51
  52    gl_Position = vproj0;
  53    gl_PointSize = (9.0*uTransform.w*scaler) / (gl_Position.z + 0.01);
  54    aWorldCo = world_pos0;
  55    aColour = a_colour*scaler;
  56    aCo = mco;
  57 }