Replace explicit matrix uniforms with single ubo

shader/lighting/occlude.geom

@@ -1,11 +1,9 @@
 #version 430 core
 layout (points) in;
 layout (triangle_strip, max_vertices = 11) out;
-
+layout (std140, binding = 0) uniform TheMat { mat4 theMat; } ;
 uniform vec2 lightPos;
-uniform mat4 worldMat;
-
-vec2 lightPosa = ( worldMat * vec4(lightPos,0,1) ).xy;
+vec2 lightPosa = ( theMat * vec4(lightPos,0,1) ).xy;
 
 vec4 shift (vec4 p)
 { return vec4 (p.xy + (200 * (p.xy-lightPos)), 0 , 1);
@@ -28,14 +26,14 @@ vec4 p6 = shift(p2);
 vec4 p7 = vec4 (p6.xy,-0.5,1);
 vec4 p8 = vec4 (p5.xy,-0.5,1);
 
-vec4 a1 = worldMat * p1;
-vec4 a2 = worldMat * p2;
-vec4 a3 = worldMat * p3;
-vec4 a4 = worldMat * p4;
-vec4 a5 = worldMat * p5;
-vec4 a6 = worldMat * p6;
-vec4 a7 = worldMat * p7;
-vec4 a8 = worldMat * p8;
+vec4 a1 = theMat * p1;
+vec4 a2 = theMat * p2;
+vec4 a3 = theMat * p3;
+vec4 a4 = theMat * p4;
+vec4 a5 = theMat * p5;
+vec4 a6 = theMat * p6;
+vec4 a7 = theMat * p7;
+vec4 a8 = theMat * p8;
 
   gl_Position = a4; EmitVertex();
   gl_Position = a3; EmitVertex();