/*
* ***** BEGIN GPL LICENSE BLOCK *****
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* The Original Code is Copyright (C) 2012 Blender Foundation.
* All rights reserved.
*
* Contributor(s): Sergey Sharybin
*
* ***** END GPL LICENSE BLOCK *****
*/
#ifndef __BLI_VORONOI_2D_H__
#define __BLI_VORONOI_2D_H__
struct ListBase;
/** \file BLI_voronoi_2d.h
* \ingroup bli
*/
typedef struct VoronoiSite {
float co[2];
float color[3];
} VoronoiSite;
typedef struct VoronoiEdge {
struct VoronoiEdge *next, *prev;
/* start and end points */
float start[2], end[2];
/* this fields are used during diagram computation only */
/* directional vector, from "start", points to "end", normal of |left, right| */
float direction[2];
/* point on Voronoi place on the left side of edge */
float left[2];
/* point on Voronoi place on the right side of edge */
float right[2];
/* directional coeffitients satisfying equation y = f * x + g (edge lies on this line) */
float f, g;
/* some edges consist of two parts,
* so we add the pointer to another part to connect them at the end of an algorithm */
struct VoronoiEdge *neighbor;
} VoronoiEdge;
typedef struct VoronoiTriangulationPoint {
float co[2];
float color[3];
int power;
} VoronoiTriangulationPoint;
void BLI_voronoi_compute(const VoronoiSite *sites, int sites_total, int width, int height, struct ListBase *edges);
void BLI_voronoi_triangulate(const VoronoiSite *sites, int sites_total, struct ListBase *edges, int width, int height,
VoronoiTriangulationPoint **triangulated_points_r, int *triangulated_points_total_r,
int (**triangles_r)[3], int *triangles_total_r);
#endif /* __BLI_VORONOI_2D_H__ */