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#ifndef __VERTEX_H__
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#define __VERTEX_H__
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#include "templates.h"
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namespace HMesh
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{
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	typedef Vertex_template<Iters> Vertex;
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	typedef Iters::VertexList VertexList;
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	typedef Iters::VertexIter VertexIter;
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	/** Null Element for vertex lists. This is used as the value of an iterator
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			that points to nothing. */
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	extern VertexIter NULL_VERTEX_ITER;
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	/// Compute valency, i.e. number of incident edges.
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	int valency(VertexIter v);
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	/** Compute the vertex normal. This function computes the angle
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			weighted sum of incident face normals. */
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	const CGLA::Vec3f normal(VertexIter v);
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	/** Returns true if the two argument vertices are in each other's
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			one-rings. */
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	bool is_connected(VertexIter v1, VertexIter v2);
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	/** Returns true if the vertex is a boundary vertex. */
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	bool is_boundary(VertexIter v);
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	/** Check and enforce boundary consistency. */
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	void check_boundary_consistency(VertexIter v);
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}
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#endif