Work on geometry shader based shadows

shader/shadow/light.geom

@@ -0,0 +1,25 @@
+#version 450 core
+layout (triangles) in;
+layout (triangle_strip, max_vertices = 3) out;
+layout (invocations = 20) in;
+layout (std140, binding = 1) uniform LightsBlock
+{
+    vec4 posBool[20];
+    vec4 colRad[20];
+} ;
+float theBool = posBool[gl_InvocationID].w;
+in vec2 vTexPos[];
+out vec2 gTexPos;
+void main()
+{
+    if (theBool == 1){
+    for (int i = 0; i < 3; i++)
+    {
+        gTexPos = vTexPos[i];
+        gl_Layer = gl_InvocationID;
+        gl_Position = gl_in[i].gl_Position;
+        EmitVertex();
+    }
+    EndPrimitive();
+    }else {}
+}