Implement multiple radial distortion rendering

shader/texture/barrel.frag

@@ -6,10 +6,7 @@ in vec2 vcpos;
 out vec4 fColor;
 layout (binding = 1) uniform sampler2D screenTexture;
 float f ( float x) {
- //return max (1, 1 / (2 * x + 0.5)) ;
- //return min (1, x) ;
  if (x>1) {return 1;} else {return (1-gfactor)*x + gfactor;}
- //if (x>1) {return 1;} else {return 0.5;}
 }
 void main()
 {
@@ -18,8 +15,4 @@ void main()
                 , 0.5+0.5 *( vcpos + t * (texPos - vcpos))
                 ) 
                 );
-    //vec4 tColor = vec4(texture(screenTexture , cpos + (texPos - cpos)) );
-    //float t = distance(cenPos,texPos);
-    //fColor = vec4(tColor.xy,t,tColor.w);
-    //fColor = tColor;
 }

shader/texture/barrel.geom

@@ -9,7 +9,6 @@ out vec2 vcpos;
 out vec2 texPos;
 out vec2 texDist;
 out float gfactor;
-
 vec2 g(float x,float y, vec2 v, vec2 r1, vec2 r2)
     { return vec2 
         (dot(normalize(r1-v),vec2(x,y)-v) / length(r1-v)
@@ -18,7 +17,6 @@ vec2 g(float x,float y, vec2 v, vec2 r1, vec2 r2)
     }
 void main() {
   vec2 cpos = vCen[0];
-  //vcpos = 2*cpos - vec2(1,1);
   vcpos = cpos;
   vec2 grad1 = vRad1[0];
   vec2 grad2 = vRad2[0];

shader/texture/barrel.vert

@@ -12,10 +12,7 @@ void main()
 {
   gl_Position = vec4(0,0,0,1);
   vCen = (theMat * vec4(pos,0,1)).xy;
-  //vCen = (theMat * vec4(0,0,0,1)).xy;
   vRad1 = (theMat * vec4(rad1,0,1)).xy;
-  //vRad1 = (theMat * vec4(0,200,0,1)).xy;
   vRad2 = (theMat * vec4(rad2,0,1)).xy;
-  //vRad2 = (theMat * vec4(200,0,0,1)).xy;
   vFactor = factor;
 }