Initial work on progressive mesh generation. Currently based on Stan Melax's PolyChop.

library/PolyVoxCore/include/progmesh.h

@@ -0,0 +1,35 @@
+/*
+ *  Progressive Mesh type Polygon Reduction Algorithm
+ *  by Stan Melax (c) 1998
+ *
+ *  The function ProgressiveMesh() takes a model in an "indexed face 
+ *  set" sort of way.  i.e. list of vertices and list of triangles.
+ *  The function then does the polygon reduction algorithm
+ *  internally and reduces the model all the way down to 0
+ *  vertices and then returns the order in which the
+ *  vertices are collapsed and to which neighbor each vertex
+ *  is collapsed to.  More specifically the returned "permutation"
+ *  indicates how to reorder your vertices so you can render
+ *  an object by using the first n vertices (for the n 
+ *  vertex version).  After permuting your vertices, the
+ *  map list indicates to which vertex each vertex is collapsed to.
+ */
+
+#ifndef PROGRESSIVE_MESH_H
+#define PROGRESSIVE_MESH_H
+
+#include "PolyVoxImpl/TypeDef.h"
+
+#include "vector_melax.h"
+#include "list.h"
+
+class tridata {
+  public:
+	int	v[3];  // indices to vertex list
+	// texture and vertex normal info removed for this demo
+};
+
+void POLYVOXCORE_API ProgressiveMesh(List<VectorM> &vert,  List<tridata> &tri, 
+                     List<int> &map,  List<int> &permutation );
+
+#endif