#version 430 core
layout (points) in;
layout (triangle_strip, max_vertices = 4) out;
in vec2 vRad1[];
in vec2 vRad2[];
in float vFactor[];
out vec2 cenPos;
out vec2 texPos;
out vec2 texDist;
out float factor;
//const float root = 1 / sqrt(2);
const float root = 1;
vec2 cpos = gl_in[0].gl_Position.xy;
vec2 rad1 = vRad1[0];
vec2 rad2 = vRad2[0];
vec2 g(float x,float y)
    { return vec2 
        //(x,y);
        (dot(rad1-cpos,vec2(x,y)-cpos)
        ,dot(rad2-cpos,vec2(x,y)-cpos)
        ); 
    }
void main() {
  float factor = vFactor[0];
  cenPos = cpos;
  texPos = vec2(1,1);
  //texDist = g(root,root);
  texDist = vec2(root,root);
  gl_Position = vec4 (1,1,0,1);
  //gl_Position = vec4 (cenPos,0,1);
  EmitVertex();
  texPos = vec2(1,0);
  //texDist = g(root,-root);
  texDist = vec2(root,-root);
  gl_Position = vec4 (1,-1,0,1);
  EmitVertex();
  texPos = vec2(0,1);
  //texDist = g(-root,root);
  texDist = vec2(-root,root);
  gl_Position = vec4 (-1,1,0,1);
  EmitVertex();
  texPos = vec2(0,0);
  //texDist = g(-root,-root);
  texDist = vec2(-root,-root);
  gl_Position = vec4 (-1,-1,0,1);
  EmitVertex();
  EndPrimitive();
}