layout (location=0) in vec4 a_co;
layout (location=1) in vec4 a_norm;
layout (location=2) in vec4 a_colour;

#include "motion_vectors_vs.glsl"

uniform mat4x3 uMdl;
uniform mat3 uNormMtx;
uniform mat4 uPv;
uniform mat4 uPvmPrev;
uniform vec2 uTime;
uniform vec4 uTransform;

out vec4 aColour;
out vec3 aNorm;
out vec3 aWorldCo;
out vec3 aCo;

vec2 rand_hash22( vec2 p )
{
   vec3 p3 = fract(vec3(p.xyx) * 213.8976123);
   p3 += dot(p3, p3.yzx+19.19);
   return fract(vec2((p3.x + p3.y)*p3.z, (p3.x+p3.z)*p3.y));
}

vec3 mapP( vec3 p )
{
   return p;
   float t = max(0.0,uTime.y);

   vec3 lco = p * 20.0;
   vec3 grid = vec3(floor(lco.x),lco.y,floor(lco.z));//fract(p);

   return mix(p,grid * (1.0/20.0), t)*vec3(1.0+t,1.0-t,1.0+t);
}

void main()
{
   vec3 mco = a_co.xyz * uTransform.w + uTransform.xyz;


   vec3 center = vec3(0.5);
   vec3 lco = mapP(mco-center);
   mco = lco + center;

   vec3 world_pos0 = uMdl     * vec4( mco, 1.0 );
   vec4 vproj0     = uPv      * vec4( world_pos0, 1.0 );
   vec4 vproj1     = uPvmPrev * vec4( mco, 1.0 );

   float t = max(0.0,uTime.y);
   float scaler = smoothstep(0.6,0.58,length(lco.xz*vec2(0.7,1.0)));

   vs_motion_out( vproj0, vproj1 );

   gl_Position = vproj0;
   gl_PointSize = (8.0*uTransform.w*scaler) / (gl_Position.z + 0.01);
   aWorldCo = world_pos0;
   aColour = a_colour*scaler*(0.3+a_co.y)+pow(1.0-a_co.y,16.0);
   aCo = mco;
   aNorm = uNormMtx * a_norm.xyz;
}