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/*
* 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.
*/
#pragma once
/** \file
* \ingroup bli
*/
#ifdef __cplusplus
extern "C" {
#endif
struct MemArena;
/**
* A version of #BLI_polyfill_calc that uses a memory arena to avoid re-allocations.
*/
void BLI_polyfill_calc_arena(const float (*coords)[2],
unsigned int coords_tot,
int coords_sign,
unsigned int (*r_tris)[3],
struct MemArena *arena);
/**
* Triangulates the given (convex or concave) simple polygon to a list of triangle vertices.
*
* \param coords: 2D coordinates describing vertices of the polygon,
* in either clockwise or counterclockwise order.
* \param coords_tot: Total points in the array.
* \param coords_sign: Pass this when we know the sign in advance to avoid extra calculations.
*
* \param r_tris: This array is filled in with triangle indices in clockwise order.
* The length of the array must be `coords_tot - 2`.
* Indices are guaranteed to be assigned to unique triangles, with valid indices,
* even in the case of degenerate input (self intersecting polygons, zero area ears... etc).
*/
void BLI_polyfill_calc(const float (*coords)[2],
unsigned int coords_tot,
int coords_sign,
unsigned int (*r_tris)[3]);
/* default size of polyfill arena */
#define BLI_POLYFILL_ARENA_SIZE MEM_SIZE_OPTIMAL(1 << 14)
#ifdef __cplusplus
}
#endif
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