out vec4 FragColor;

#include "motion_vectors_fs.glsl"

uniform vec3 uCamera;

in vec4 aColour;
in vec3 aCo;
in vec3 aWorldCo;

void main()
{
   vec2 ssuv = gl_FragCoord.xy;
   vec3 vDither = vec3( dot( vec2( 171.0, 231.0 ), ssuv) );
   float dither = fract( vDither.g / 71.0 ) - 0.5;

   float diff = length(gl_PointCoord.xy-vec2(0.5));
   if( diff+dither>0.5 )discard;

   compute_motion_vectors();
   FragColor = aColour;
}