/*
Copyright (C) 1999-2006 Id Software, Inc. and contributors.
For a list of contributors, see the accompanying CONTRIBUTORS file.

This file is part of GtkRadiant.

GtkRadiant 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.

GtkRadiant 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 GtkRadiant; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
*/


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

#define	MAX_POINTS_ON_WINDING	64

// you can define on_epsilon in the makefile as tighter
#ifndef	ON_EPSILON
#define	ON_EPSILON	0.1
#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);
