2007-11-04 03:47:06 +00:00
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/*
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Copyright (C) 1999-2007 id Software, Inc. and contributors.
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For a list of contributors, see the accompanying CONTRIBUTORS file.
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This file is part of GtkRadiant.
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GtkRadiant is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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GtkRadiant is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GtkRadiant; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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typedef struct
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{
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int numpoints;
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vec3_t p[4]; // variable sized
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} winding_t;
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#define MAX_POINTS_ON_WINDING 64
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// you can define on_epsilon in the makefile as tighter
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#ifndef ON_EPSILON
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#define ON_EPSILON 0.1
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#endif
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winding_t *AllocWinding (int points);
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vec_t WindingArea (winding_t *w);
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void WindingCenter (winding_t *w, vec3_t center);
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void ClipWindingEpsilon (winding_t *in, vec3_t normal, vec_t dist,
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vec_t epsilon, winding_t **front, winding_t **back);
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winding_t *ChopWinding (winding_t *in, vec3_t normal, vec_t dist);
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winding_t *CopyWinding (winding_t *w);
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winding_t *ReverseWinding (winding_t *w);
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winding_t *BaseWindingForPlane (vec3_t normal, vec_t dist);
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void CheckWinding (winding_t *w);
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void WindingPlane (winding_t *w, vec3_t normal, vec_t *dist);
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void RemoveColinearPoints (winding_t *w);
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int WindingOnPlaneSide (winding_t *w, vec3_t normal, vec_t dist);
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void FreeWinding (winding_t *w);
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void WindingBounds (winding_t *w, vec3_t mins, vec3_t maxs);
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void ChopWindingInPlace (winding_t **w, vec3_t normal, vec_t dist, vec_t epsilon);
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// frees the original if clipped
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void pw(winding_t *w);
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