use an element buffer for rendering

src/util.h

@@ -1,23 +1,39 @@
 #ifndef UTIL_H
 #define UTIL_H
 
-#include "my_mesh.h"
-
 
+template <typename Mesh>
 class HalfedgeLoopRange {
-	MyMesh &mesh;
-	const HalfedgeHandle &start;
+	Mesh &mesh;
+	const typename Mesh::HalfedgeHandle &start;
 
   public:
-	HalfedgeLoopRange(MyMesh &mesh, const HalfedgeHandle &start)
+	HalfedgeLoopRange(Mesh &mesh, const typename Mesh::HalfedgeHandle &start)
 		:mesh(mesh), start(start) {}
-	MyMesh::HalfedgeLoopIter begin() {
+	typename Mesh::HalfedgeLoopIter begin() {
 		return mesh.hl_begin(start);
 	}
-	MyMesh::HalfedgeLoopIter end() {
+	typename Mesh::HalfedgeLoopIter end() {
 		return mesh.hl_end(start);
 	}
 };
 
 
+template <typename Mesh>
+class ConstHalfedgeLoopRange {
+	Mesh &mesh;
+	const typename Mesh::HalfedgeHandle &start;
+
+  public:
+	ConstHalfedgeLoopRange(Mesh &mesh, const typename Mesh::HalfedgeHandle &start)
+		:mesh(mesh), start(start) {}
+	typename Mesh::HalfedgeLoopIter begin() {
+		return mesh.chl_begin(start);
+	}
+	typename Mesh::HalfedgeLoopIter end() {
+		return mesh.chl_end(start);
+	}
+};
+
+
 #endif