/* 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 ChopWindingInPlace( winding_t **w, vec3_t normal, vec_t dist, vec_t epsilon ); // frees the original if clipped void pw( winding_t *w );