text: /*
  ===========================================================================
  Copyright (C) 1999-2005 Id Software, Inc.
  
  This file is part of Quake III Arena source code.
  
  Quake III Arena 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 2 of the License,
  or (at your option) any later version.
  
  Quake III Arena 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 Quake III Arena source code; if not, write to the Free Software
  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  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);
  