/*
===========================================================================

Wolfenstein: Enemy Territory GPL Source Code
Copyright (C) 1999-2010 id Software LLC, a ZeniMax Media company. 

This file is part of the Wolfenstein: Enemy Territory GPL Source Code (Wolf ET Source Code).  

Wolf ET Source Code 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.

Wolf ET Source Code 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 Wolf ET Source Code.  If not, see <http://www.gnu.org/licenses/>.

In addition, the Wolf: ET 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 Wolf ET Source Code.  If not, please request a copy in writing from id Software at the address below.

If you have questions concerning this license or the applicable additional terms, you may contact in writing id Software LLC, c/o ZeniMax Media Inc., Suite 120, Rockville, Maryland 20850 USA.

===========================================================================
*/


// this is only used for visualization tools in cm_ debug functions

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 );
