ref: bf5dc91f8d7bc2035effd18290c523050fa1b2cd
dir: /code/qcommon/cm_polylib.h/
/*
===========================================================================
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 Foobar; 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);