#version 430 core
layout (points) in;
layout (triangle_strip, max_vertices = 4) out;
in vec4 vColor [];
in vec4 vparams [];
out vec4 gColor;
out float gRadIn;
out float gRadOut;
out vec2 cenPosT;
out vec2 angles;

uniform vec2 winSize;
uniform float zoom;

void main()
{
  angles = vparams[0].xy;
  vec3 cenPos = gl_in[0].gl_Position.xyz;
  gColor = vColor[0];
  float width = vparams[0].w * 0.5;
  float rad = vparams[0].z;
  gRadOut = (rad + width) * zoom * 2;
  gRadIn  = (rad - width) * zoom * 2;

  cenPosT = vec2 ( (cenPos.x + 1) * 0.5 * winSize.x , (cenPos.y + 1) * 0.5 * winSize.y);

  gl_Position = vec4 (cenPos.x + gRadOut/winSize.x, cenPos.y + gRadOut/winSize.y, cenPos.z , 1);
  EmitVertex();
  gl_Position = vec4 (cenPos.x - gRadOut/winSize.x, cenPos.y + gRadOut/winSize.y, cenPos.z , 1);
  EmitVertex();
  gl_Position = vec4 (cenPos.x + gRadOut/winSize.x, cenPos.y - gRadOut/winSize.y, cenPos.z , 1);
  EmitVertex();
  gl_Position = vec4 (cenPos.x - gRadOut/winSize.x, cenPos.y - gRadOut/winSize.y, cenPos.z , 1);
  EmitVertex();

  EndPrimitive();
}