Replace explicit matrix uniforms with single ubo

shader/lighting/wall.geom

@@ -1,14 +1,11 @@
 #version 430 core
 layout (points) in;
 layout (triangle_strip, max_vertices = 4) out;
-
+layout (std140, binding = 0) uniform TheMat { mat4 theMat; } ;
 out vec3 dField;
 out float lum;
-
 uniform vec2 lightPos;
-uniform mat4 worldMat;
 uniform vec2 radLum;
-
 float isLHS (vec2 startV, vec2 testV)
 {
     return sign( -startV.x * testV.y + startV.y * testV.x);
@@ -31,10 +28,10 @@ if (isLHS (p1.xy - lightPos, p2.xy - lightPos) < 0)
     vec2 d1 = p1.xy - lightPos;
     vec2 d2 = p2.xy - lightPos;
     
-    vec4 a1 = shiftCloser( worldMat * p1 );
-    vec4 a2 = shiftCloser( worldMat * p2 );
-    vec4 a3 = shiftCloser( worldMat * p3 );
-    vec4 a4 = shiftCloser( worldMat * p4 );
+    vec4 a1 = shiftCloser( theMat * p1 );
+    vec4 a2 = shiftCloser( theMat * p2 );
+    vec4 a3 = shiftCloser( theMat * p3 );
+    vec4 a4 = shiftCloser( theMat * p4 );
     
     dField = vec3( d1.x/rad, d1.y/rad, 0);
     gl_Position = a1;