delaunay.h

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/* $Id$ $Revision$ */
/* vim:set shiftwidth=4 ts=8: */

/*************************************************************************
 * Copyright (c) 2011 AT&T Intellectual Property 
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors: See CVS logs. Details at http://www.graphviz.org/
 *************************************************************************/

#ifndef DELAUNAY_H
#define DELAUNAY_H

#include "sparsegraph.h"

typedef struct {
    int  nedges; /* no. of edges in triangulation */
    int* edges;  /* 2*nsegs indices of points */
    int  nfaces; /* no. of faces in triangulation */
    int* faces;  /* 3*nfaces indices of points */ 
    int* neigh;  /* 3*nfaces indices of neighbor triangles */ 
} surface_t;

v_data *delaunay_triangulation(double *x, double *y, int n);

int *delaunay_tri (double *x, double *y, int n, int* nedges);

int *get_triangles (double *x, int n, int* ntris);

v_data *UG_graph(double *x, double *y, int n, int accurate_computation);

surface_t* mkSurface (double *x, double *y, int n, int* segs, int nsegs);

void freeSurface (surface_t* s);

#endif