/*
 * Wolfenstein: Enemy Territory GPL Source Code
 * Copyright (C) 1999-2010 id Software LLC, a ZeniMax Media company.
 *
 * ET: Legacy
 * Copyright (C) 2012-2018 ET:Legacy team <mail@etlegacy.com>
 *
 * This file is part of ET: Legacy - http://www.etlegacy.com
 *
 * ET: Legacy 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 3 of the License, or
 * (at your option) any later version.
 *
 * ET: Legacy 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 ET: Legacy. If not, see <http://www.gnu.org/licenses/>.
 *
 * In addition, Wolfenstein: Enemy Territory GPL Source Code is also
 * subject to certain additional terms. You should have received a copy
 * of these additional terms immediately following the terms and conditions
 * of the GNU General Public License which accompanied the source code.
 * If not, please request a copy in writing from id Software at the address below.
 *
 * id Software LLC, c/o ZeniMax Media Inc., Suite 120, Rockville, Maryland 20850 USA.
 */
/**
 * @file cm_polylib.c
 * @brief Used only for visualization tools in cm_ debug functions
 */

#ifndef INCLUDE_CM_POLYLIB_H
#define INCLUDE_CM_POLYLIB_H

typedef struct
{
	int numpoints;
	vec3_t p[4];        // variable sized
} winding_t;

#define MAX_POINTS_ON_WINDING   64

#define SIDE_FRONT  0
#define SIDE_BACK   1
#define SIDE_ON     2
#define SIDE_CROSS  3

#define CLIP_EPSILON    0.1f

#define MAX_MAP_BOUNDS  65535

// you can define on_epsilon in the makefile as tighter
#ifndef ON_EPSILON
#define ON_EPSILON  0.1f
#endif

winding_t *AllocWinding(int points);
vec_t WindingArea(winding_t *w);
void WindingCenter(winding_t *w, vec3_t center);
void ClipWindingEpsilon(winding_t *in, vec3_t normal, vec_t dist,
                        vec_t epsilon, winding_t **front, winding_t **back);
winding_t *ChopWinding(winding_t *in, vec3_t normal, vec_t dist);
winding_t *CopyWinding(winding_t *w);
winding_t *ReverseWinding(winding_t *w);
winding_t *BaseWindingForPlane(vec3_t normal, vec_t dist);
void CheckWinding(winding_t *w);
void WindingPlane(winding_t *w, vec3_t normal, vec_t *dist);
void RemoveColinearPoints(winding_t *w);
int WindingOnPlaneSide(winding_t *w, vec3_t normal, vec_t dist);
void FreeWinding(winding_t *w);
void WindingBounds(winding_t *w, vec3_t mins, vec3_t maxs);

void AddWindingToConvexHull(winding_t *w, winding_t **hull, vec3_t normal);

void ChopWindingInPlace(winding_t **w, vec3_t normal, vec_t dist, vec_t epsilon);
// frees the original if clipped

void pw(winding_t *w);

#endif // #ifndef INCLUDE_CM_POLYLIB_H
