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56e74492bc
- Adding new function ChopWindingInPlaceAccu() in polylib.c. This function is just like ChopWindingInPlace() except that the winding input has the higher vect_accu_t resolution. I actually did a deep massage of this code as well (went over it with a fine-toothed comb). I still need to examine it at least one more time when I'm fresh, and fix an issue related to choosing the value for maxpts. - In mathlib.h, defining VEC_SMALLEST_EPSILON and VEC_ACCU_SMALLEST_EPSILON constants that will help determine suitable epsilons to use for certain operations. Comments are provided detailing what these constants do. - In mathlib.h, defining DotProductAccu() and VectorCopyAccu(). - Small comment in brush.c that has concerns about a certain use of BaseWindingForPlane() in WriteBSPBrushMap(). State of this code is: compiles on Linux. May not compile on Windows. Not tested (new functionality not used yet in any real code, only functions exist). git-svn-id: svn://svn.icculus.org/gtkradiant/GtkRadiant/branches/Rambetter-math-fix-experiments@382 8a3a26a2-13c4-0310-b231-cf6edde360e5
72 lines
2.5 KiB
C
72 lines
2.5 KiB
C
/*
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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 AddWindingToConvexHull( winding_t *w, winding_t **hull, vec3_t normal );
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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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///////////////////////////////////////////////////////////////////////////////////////
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// Below is double-precision stuff. This was initially needed by the base winding code
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// in q3map2 brush processing.
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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_accu_t p[4]; // variable sized
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} winding_accu_t;
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winding_accu_t *BaseWindingForPlaneAccu(vec3_t normal, vec_t dist);
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void ChopWindingInPlaceAccu(winding_accu_t **w, vec3_t normal, vec_t dist, vec_t epsilon);
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