First pass implementing exponentially fading lighting

shader/fadeCircle.geom

@@ -1,30 +1,39 @@
 #version 430 core
 layout (points) in;
 layout (triangle_strip, max_vertices = 4) out;
-in vec4 vColor [];
-in float vRad [];
+in vec2 vParams [];
+out vec2 gParams;
+out vec2 cenPosT;
+
 uniform vec2 winSize;
-out vec4 gColor;
-out float gRad;
-out vec2 cenPosTrans;
+uniform float zoom;
+
 void main()
 {
   vec3 cenPos = gl_in[0].gl_Position.xyz;
-  vec2 cenPosa = cenPos.xy + vec2 (1,1);
-  cenPosTrans = vec2 (cenPosa * winSize * 0.5);
-  gColor = vColor[0];
-  gRad = vRad[0];
+  //cenPos = vec3 (0.5,0,0);
+  gParams = vec2( vParams[0].x * zoom * 2, vParams[0].y);
+  float gRad = gParams.x;
 
-  gl_Position = vec4 (cenPos.x + gRad/winSize.x, cenPos.y + gRad/winSize.y, cenPos.z , 1);
+  cenPosT = vec2 ( (cenPos.x + 1) * 0.5 * winSize.x , (cenPos.y + 1) * 0.5 * winSize.y);
+
+  gl_Position = vec4 (cenPos.x + gRad/winSize.x, cenPos.y + gRad/winSize.y, 0.9 , 1);
   EmitVertex();
-  gl_Position = vec4 (cenPos.x - gRad/winSize.x, cenPos.y + gRad/winSize.y, cenPos.z , 1);
+  gl_Position = vec4 (cenPos.x - gRad/winSize.x, cenPos.y + gRad/winSize.y, 0.9 , 1);
   EmitVertex();
-  gl_Position = vec4 (cenPos.x + gRad/winSize.x, cenPos.y - gRad/winSize.y, cenPos.z , 1);
+  gl_Position = vec4 (cenPos.x + gRad/winSize.x, cenPos.y - gRad/winSize.y, 0.9 , 1);
   EmitVertex();
-  gl_Position = vec4 (cenPos.x - gRad/winSize.x, cenPos.y - gRad/winSize.y, cenPos.z , 1);
+  gl_Position = vec4 (cenPos.x - gRad/winSize.x, cenPos.y - gRad/winSize.y, 0.9 , 1);
   EmitVertex();
 
+//  gl_Position = vec4 (0.5,0.5,0 , 1);
+//  EmitVertex();
+//  gl_Position = vec4 (0,0.5,0 , 1);
+//  EmitVertex();
+//  gl_Position = vec4 (0.5,0,0 , 1);
+//  EmitVertex();
+//  gl_Position = vec4 (0,0,0 , 1);
+//  EmitVertex();
 
   EndPrimitive();
-
 }