MeshFrame: a Light Weighted Dynamic Mesh Processing FrameWork

MeshFrame offers a convenient way to add dynamic properties to mesh elements (vertices, faces, edges, halfedges, tetrahedrals). As in constrast to static way that adds member attributes to inherited classes, the dynamic is much more flexible and convenient because it can be done in the runtime without relying re-compiling. However, accessing dynamic properties is generally considered less efficient in comparison to static properties. Because in most of the implementation, accessing the dynamic properties requires a dictionary search, whose complexity is non-constant. However, in our implementation, we managed to reduce the complexity of accessing dynamic properties to constant. This is achieved through PropHandle. Adding a property to a mesh element is as easy as:

	Mesh m;
	VPropHandle vPropHandle; 
	m.addVProp(vPropHandle);
					

Accessing the added property is as easy as:

	for (M::VPtr pV : m.vertices()) {
		int & idx = m.getVProp(vIntHandles[NUM_PROPS -1], pV);
		idx = k++;
	}
					

	class MyVertex : public CVertex
	{
	public:		
		float property;

	};
					

Here we compare the speed of our dynamic property with static property and another dynamic property implementation by OpenMesh:

Dynamic Structure Editing

MeshFrame supports dynamic mesh structure editing in the runtime. It has built-in command to do common structural editing like edge collapse, edge split or vertex split:

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And the command for doing this is very simple, MeshFrame will handle the complex memory management and the halfedge structure change behind the scene:

DMesh m;
DMEdge* eToCollapse = selectEdge();
m.edgecollapse(e);
DMEdge* eToSplit = selectEdge();
m.edgesplit(e, 0.5); // the second parameter tells where you split the selected edge