#version 450 core
in vec4 gColor;
in vec2 cenPosTrans;
in float gRad;
out vec4 fColor;

void main()
{
  vec2 pos = gl_FragCoord.xy;
  float dist = max(0 , 1 - 2 * distance(pos,cenPosTrans) / (gRad));
  fColor = vec4( gColor.xyz , pow(gColor.z*dist,2) );
}