polylib.h

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/*
Copyright (C) 1997-2001 Id Software, Inc.

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., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.

*/

#pragma once

#include "../../../shared/mathlib.h"

typedef struct winding_s {
    int     numpoints;
    vec3_t  p[4];       
} winding_t;

#define MAX_POINTS_ON_WINDING   64

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

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