functionality to compute subquad ids and corners

quad.h

@@ -9,7 +9,12 @@ namespace vb01{
 		public:
 			Quad(Vector3, bool = true, int numVertDiv = 0, int numHorDiv = 0);
 			void setSize(Vector3);
+			Vector3 getSubquadCorner(int, int, int, int, bool, bool);
+			Vector2 getSubquadIds(int, int, Vector3, Vector3);
 			inline Vector3 getSize(){return size;}
+			inline Vector2 getSubquadSize(){return Vector2(size.x / (numHorDiv + 1), size.y / (numVertDiv + 1));}
+			inline int getNumHorSubquads(){return numHorDiv + 1;}
+			inline int getNumVertSubquads(){return numVertDiv + 1;}
 		private:
 			Vector3 size;
 			bool spatial;