Initial work on background visualization

XIONControlPanel/Shaders/FinalRender.fsh

@@ -0,0 +1,23 @@
+//
+//  FinalRender.fsh
+//  XIONControlPanel
+//
+//  Created by Charles Magahern on 12/29/15.
+//  Copyright © 2015 XION. All rights reserved.
+//
+
+uniform sampler2D   u_colorSampler;
+uniform sampler2D   u_blurmapSampler;
+varying vec2        v_uv;
+
+float saturate(float v)
+{
+    return clamp(v, 0.0, 1.0);
+}
+
+void main()
+{
+    vec4 color = texture2D(u_colorSampler, v_uv) + texture2D(u_blurmapSampler, v_uv);
+    float dist = length(v_uv - vec2(0.5));
+    gl_FragColor = saturate(1.0 / (8.0 * (dist + 0.1))) * color;
+}