shaders/trail.vs

   1 layout (location=0) in vec4 a_co;
   2
   3 #include "motion_vectors_vs.glsl"
   4
   5 uniform mat4 uPv;
   6 uniform mat4 uPvPrev;
   7
   8 out float aAlpha;
   9
  10 void main(){
  11    vec4 vproj0     = uPv     * vec4( a_co.xyz, 1.0 );
  12    vec4 vproj1     = uPvPrev * vec4( a_co.xyz, 1.0 );
  13    vs_motion_out( vproj0, vproj1 );
  14
  15    gl_Position = vproj0;
  16    aAlpha = a_co.w;
  17 }