mirror of
https://github.com/UberGames/GtkRadiant.git
synced 2024-12-21 01:41:00 +00:00
9998050654
git-svn-id: svn://svn.icculus.org/gtkradiant/GtkRadiant/branches/ZeroRadiant@183 8a3a26a2-13c4-0310-b231-cf6edde360e5
1329 lines
25 KiB
C
1329 lines
25 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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#include "qbsp.h"
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int c_nodes;
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int c_nonvis;
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int c_active_brushes;
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// if a brush just barely pokes onto the other side,
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// let it slide by without chopping
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#define PLANESIDE_EPSILON 0.001
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//0.1
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#define PSIDE_FRONT 1
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#define PSIDE_BACK 2
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#define PSIDE_BOTH (PSIDE_FRONT|PSIDE_BACK)
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#define PSIDE_FACING 4
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void FindBrushInTree (node_t *node, int brushnum)
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{
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bspbrush_t *b;
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if (node->planenum == PLANENUM_LEAF)
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{
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for (b=node->brushlist ; b ; b=b->next)
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if (b->original->brushnum == brushnum)
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Sys_Printf ("here\n");
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return;
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}
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FindBrushInTree (node->children[0], brushnum);
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FindBrushInTree (node->children[1], brushnum);
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}
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//==================================================
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/*
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================
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DrawBrushList
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================
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*/
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void DrawBrushList (bspbrush_t *brush, node_t *node)
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{
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int i;
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side_t *s;
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GLS_BeginScene ();
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for ( ; brush ; brush=brush->next)
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{
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for (i=0 ; i<brush->numsides ; i++)
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{
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s = &brush->sides[i];
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if (!s->winding)
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continue;
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if (s->texinfo == TEXINFO_NODE)
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GLS_Winding (s->winding, 1);
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else if (!s->visible)
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GLS_Winding (s->winding, 2);
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else
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GLS_Winding (s->winding, 0);
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}
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}
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GLS_EndScene ();
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}
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/*
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================
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WriteBrushList
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================
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*/
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void WriteBrushList (char *name, bspbrush_t *brush, qboolean onlyvis)
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{
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int i;
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side_t *s;
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FILE *f;
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Sys_FPrintf( SYS_VRB, "writing %s\n", name);
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f = SafeOpenWrite (name);
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for ( ; brush ; brush=brush->next)
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{
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for (i=0 ; i<brush->numsides ; i++)
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{
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s = &brush->sides[i];
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if (!s->winding)
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continue;
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if (onlyvis && !s->visible)
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continue;
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OutputWinding (brush->sides[i].winding, f);
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}
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}
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fclose (f);
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}
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void PrintBrush (bspbrush_t *brush)
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{
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int i;
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Sys_Printf ("brush: %p\n", brush);
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for (i=0;i<brush->numsides ; i++)
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{
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pw(brush->sides[i].winding);
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Sys_Printf ("\n");
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}
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}
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/*
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==================
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BoundBrush
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Sets the mins/maxs based on the windings
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==================
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*/
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void BoundBrush (bspbrush_t *brush)
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{
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int i, j;
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winding_t *w;
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ClearBounds (brush->mins, brush->maxs);
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for (i=0 ; i<brush->numsides ; i++)
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{
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w = brush->sides[i].winding;
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if (!w)
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continue;
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for (j=0 ; j<w->numpoints ; j++)
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AddPointToBounds (w->p[j], brush->mins, brush->maxs);
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}
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}
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/*
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==================
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CreateBrushWindings
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==================
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*/
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void CreateBrushWindings (bspbrush_t *brush)
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{
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int i, j;
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winding_t *w;
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side_t *side;
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plane_t *plane;
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for (i=0 ; i<brush->numsides ; i++)
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{
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side = &brush->sides[i];
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plane = &mapplanes[side->planenum];
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w = BaseWindingForPlane (plane->normal, plane->dist);
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for (j=0 ; j<brush->numsides && w; j++)
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{
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if (i == j)
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continue;
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if (brush->sides[j].bevel)
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continue;
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plane = &mapplanes[brush->sides[j].planenum^1];
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ChopWindingInPlace (&w, plane->normal, plane->dist, 0); //CLIP_EPSILON);
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}
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side->winding = w;
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}
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BoundBrush (brush);
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}
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/*
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==================
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BrushFromBounds
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Creates a new axial brush
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==================
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*/
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bspbrush_t *BrushFromBounds (vec3_t mins, vec3_t maxs)
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{
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bspbrush_t *b;
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int i;
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vec3_t normal;
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vec_t dist;
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b = AllocBrush (6);
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b->numsides = 6;
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for (i=0 ; i<3 ; i++)
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{
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VectorClear (normal);
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normal[i] = 1;
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dist = maxs[i];
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b->sides[i].planenum = FindFloatPlane (normal, dist);
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normal[i] = -1;
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dist = -mins[i];
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b->sides[3+i].planenum = FindFloatPlane (normal, dist);
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}
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CreateBrushWindings (b);
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return b;
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}
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/*
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==================
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BrushVolume
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==================
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*/
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vec_t BrushVolume (bspbrush_t *brush)
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{
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int i;
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winding_t *w;
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vec3_t corner;
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vec_t d, area, volume;
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plane_t *plane;
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if (!brush)
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return 0;
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// grab the first valid point as the corner
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w = NULL;
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for (i=0 ; i<brush->numsides ; i++)
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{
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w = brush->sides[i].winding;
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if (w)
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break;
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}
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if (!w)
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return 0;
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VectorCopy (w->p[0], corner);
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// make tetrahedrons to all other faces
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volume = 0;
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for ( ; i<brush->numsides ; i++)
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{
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w = brush->sides[i].winding;
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if (!w)
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continue;
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plane = &mapplanes[brush->sides[i].planenum];
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d = -(DotProduct (corner, plane->normal) - plane->dist);
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area = WindingArea (w);
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volume += d*area;
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}
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volume /= 3;
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return volume;
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}
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/*
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================
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CountBrushList
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================
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*/
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int CountBrushList (bspbrush_t *brushes)
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{
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int c;
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c = 0;
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for ( ; brushes ; brushes = brushes->next)
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c++;
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return c;
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}
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/*
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================
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AllocTree
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================
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*/
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tree_t *AllocTree (void)
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{
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tree_t *tree;
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tree = malloc(sizeof(*tree));
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memset (tree, 0, sizeof(*tree));
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ClearBounds (tree->mins, tree->maxs);
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return tree;
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}
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/*
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================
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AllocNode
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================
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*/
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node_t *AllocNode (void)
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{
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node_t *node;
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node = malloc(sizeof(*node));
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memset (node, 0, sizeof(*node));
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return node;
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}
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/*
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================
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AllocBrush
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================
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*/
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bspbrush_t *AllocBrush (int numsides)
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{
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bspbrush_t *bb;
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int c;
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c = (int)&(((bspbrush_t *)0)->sides[numsides]);
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bb = malloc(c);
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memset (bb, 0, c);
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if (numthreads == 1)
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c_active_brushes++;
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return bb;
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}
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/*
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================
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FreeBrush
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================
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*/
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void FreeBrush (bspbrush_t *brushes)
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{
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int i;
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for (i=0 ; i<brushes->numsides ; i++)
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if (brushes->sides[i].winding)
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FreeWinding(brushes->sides[i].winding);
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free (brushes);
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if (numthreads == 1)
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c_active_brushes--;
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}
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/*
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================
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FreeBrushList
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================
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*/
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void FreeBrushList (bspbrush_t *brushes)
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{
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bspbrush_t *next;
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for ( ; brushes ; brushes = next)
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{
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next = brushes->next;
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FreeBrush (brushes);
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}
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}
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/*
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==================
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CopyBrush
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Duplicates the brush, the sides, and the windings
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==================
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*/
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bspbrush_t *CopyBrush (bspbrush_t *brush)
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{
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bspbrush_t *newbrush;
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int size;
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int i;
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size = (int)&(((bspbrush_t *)0)->sides[brush->numsides]);
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newbrush = AllocBrush (brush->numsides);
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memcpy (newbrush, brush, size);
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for (i=0 ; i<brush->numsides ; i++)
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{
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if (brush->sides[i].winding)
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newbrush->sides[i].winding = CopyWinding (brush->sides[i].winding);
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}
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return newbrush;
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}
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/*
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==================
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PointInLeaf
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==================
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*/
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node_t *PointInLeaf (node_t *node, vec3_t point)
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{
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vec_t d;
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plane_t *plane;
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while (node->planenum != PLANENUM_LEAF)
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{
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plane = &mapplanes[node->planenum];
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d = DotProduct (point, plane->normal) - plane->dist;
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if (d > 0)
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node = node->children[0];
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else
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node = node->children[1];
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}
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return node;
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}
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//========================================================
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/*
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==============
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BoxOnPlaneSide
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Returns PSIDE_FRONT, PSIDE_BACK, or PSIDE_BOTH
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==============
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*/
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int BoxOnPlaneSide (vec3_t mins, vec3_t maxs, plane_t *plane)
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{
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int side;
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int i;
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vec3_t corners[2];
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vec_t dist1, dist2;
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// axial planes are easy
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if (plane->type < 3)
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{
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side = 0;
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if (maxs[plane->type] > plane->dist+PLANESIDE_EPSILON)
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side |= PSIDE_FRONT;
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if (mins[plane->type] < plane->dist-PLANESIDE_EPSILON)
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side |= PSIDE_BACK;
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return side;
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}
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// create the proper leading and trailing verts for the box
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for (i=0 ; i<3 ; i++)
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{
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if (plane->normal[i] < 0)
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{
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corners[0][i] = mins[i];
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corners[1][i] = maxs[i];
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}
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else
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{
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corners[1][i] = mins[i];
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corners[0][i] = maxs[i];
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}
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}
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dist1 = DotProduct (plane->normal, corners[0]) - plane->dist;
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dist2 = DotProduct (plane->normal, corners[1]) - plane->dist;
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side = 0;
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if (dist1 >= PLANESIDE_EPSILON)
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side = PSIDE_FRONT;
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if (dist2 < PLANESIDE_EPSILON)
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side |= PSIDE_BACK;
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return side;
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}
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/*
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============
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QuickTestBrushToPlanenum
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============
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*/
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int QuickTestBrushToPlanenum (bspbrush_t *brush, int planenum, int *numsplits)
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{
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int i, num;
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plane_t *plane;
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int s;
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*numsplits = 0;
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// if the brush actually uses the planenum,
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// we can tell the side for sure
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for (i=0 ; i<brush->numsides ; i++)
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{
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num = brush->sides[i].planenum;
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if (num >= 0x10000)
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Error ("bad planenum");
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if (num == planenum)
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return PSIDE_BACK|PSIDE_FACING;
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if (num == (planenum ^ 1) )
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return PSIDE_FRONT|PSIDE_FACING;
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}
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// box on plane side
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plane = &mapplanes[planenum];
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s = BoxOnPlaneSide (brush->mins, brush->maxs, plane);
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// if both sides, count the visible faces split
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if (s == PSIDE_BOTH)
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{
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*numsplits += 3;
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}
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return s;
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}
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/*
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============
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TestBrushToPlanenum
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|
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============
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*/
|
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int TestBrushToPlanenum (bspbrush_t *brush, int planenum,
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int *numsplits, qboolean *hintsplit, int *epsilonbrush)
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{
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int i, j, num;
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plane_t *plane;
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int s;
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winding_t *w;
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vec_t d, d_front, d_back;
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int front, back;
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*numsplits = 0;
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*hintsplit = false;
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// if the brush actually uses the planenum,
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// we can tell the side for sure
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for (i=0 ; i<brush->numsides ; i++)
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{
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num = brush->sides[i].planenum;
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if (num >= 0x10000)
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Error ("bad planenum");
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if (num == planenum)
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return PSIDE_BACK|PSIDE_FACING;
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if (num == (planenum ^ 1) )
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return PSIDE_FRONT|PSIDE_FACING;
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}
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// box on plane side
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plane = &mapplanes[planenum];
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s = BoxOnPlaneSide (brush->mins, brush->maxs, plane);
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if (s != PSIDE_BOTH)
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return s;
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// if both sides, count the visible faces split
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d_front = d_back = 0;
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for (i=0 ; i<brush->numsides ; i++)
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{
|
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if (brush->sides[i].texinfo == TEXINFO_NODE)
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continue; // on node, don't worry about splits
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if (!brush->sides[i].visible)
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continue; // we don't care about non-visible
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w = brush->sides[i].winding;
|
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if (!w)
|
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continue;
|
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front = back = 0;
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for (j=0 ; j<w->numpoints; j++)
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{
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d = DotProduct (w->p[j], plane->normal) - plane->dist;
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if (d > d_front)
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d_front = d;
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if (d < d_back)
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d_back = d;
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|
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if (d > 0.1) // PLANESIDE_EPSILON)
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front = 1;
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if (d < -0.1) // PLANESIDE_EPSILON)
|
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back = 1;
|
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}
|
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if (front && back)
|
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{
|
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if ( !(brush->sides[i].surf & SURF_SKIP) )
|
|
{
|
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(*numsplits)++;
|
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if (brush->sides[i].surf & SURF_HINT)
|
|
*hintsplit = true;
|
|
}
|
|
}
|
|
}
|
|
|
|
if ( (d_front > 0.0 && d_front < 1.0)
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|
|| (d_back < 0.0 && d_back > -1.0) )
|
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(*epsilonbrush)++;
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|
|
#if 0
|
|
if (*numsplits == 0)
|
|
{ // didn't really need to be split
|
|
if (front)
|
|
s = PSIDE_FRONT;
|
|
else if (back)
|
|
s = PSIDE_BACK;
|
|
else
|
|
s = 0;
|
|
}
|
|
#endif
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|
|
return s;
|
|
}
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//========================================================
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/*
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================
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WindingIsTiny
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Returns true if the winding would be crunched out of
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existance by the vertex snapping.
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================
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*/
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#define EDGE_LENGTH 0.2
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qboolean WindingIsTiny (winding_t *w)
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{
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#if 0
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if (WindingArea (w) < 1)
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return true;
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return false;
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#else
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int i, j;
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vec_t len;
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vec3_t delta;
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int edges;
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edges = 0;
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for (i=0 ; i<w->numpoints ; i++)
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{
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j = i == w->numpoints - 1 ? 0 : i+1;
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VectorSubtract (w->p[j], w->p[i], delta);
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len = (float) VectorLength (delta);
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if (len > EDGE_LENGTH)
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{
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if (++edges == 3)
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return false;
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}
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}
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return true;
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#endif
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}
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/*
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================
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WindingIsHuge
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Returns true if the winding still has one of the points
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from basewinding for plane
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================
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*/
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qboolean WindingIsHuge (winding_t *w)
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{
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int i, j;
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for (i=0 ; i<w->numpoints ; i++)
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{
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for (j=0 ; j<3 ; j++)
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if (w->p[i][j] < -8000 || w->p[i][j] > 8000)
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return true;
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}
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return false;
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}
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//============================================================
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/*
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================
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Leafnode
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================
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*/
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void LeafNode (node_t *node, bspbrush_t *brushes)
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{
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bspbrush_t *b;
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int i;
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node->planenum = PLANENUM_LEAF;
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node->contents = 0;
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for (b=brushes ; b ; b=b->next)
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{
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// if the brush is solid and all of its sides are on nodes,
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// it eats everything
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if (b->original->contents & CONTENTS_SOLID)
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{
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for (i=0 ; i<b->numsides ; i++)
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if (b->sides[i].texinfo != TEXINFO_NODE)
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break;
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if (i == b->numsides)
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{
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node->contents = CONTENTS_SOLID;
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break;
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}
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}
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node->contents |= b->original->contents;
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}
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node->brushlist = brushes;
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}
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//============================================================
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void CheckPlaneAgainstParents (int pnum, node_t *node)
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{
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node_t *p;
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for (p=node->parent ; p ; p=p->parent)
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{
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if (p->planenum == pnum)
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Error ("Tried parent");
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}
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}
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qboolean CheckPlaneAgainstVolume (int pnum, node_t *node)
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{
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bspbrush_t *front, *back;
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qboolean good;
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SplitBrush (node->volume, pnum, &front, &back);
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good = (front && back);
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if (front)
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FreeBrush (front);
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if (back)
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FreeBrush (back);
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return good;
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}
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/*
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================
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SelectSplitSide
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Using a hueristic, choses one of the sides out of the brushlist
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to partition the brushes with.
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Returns NULL if there are no valid planes to split with..
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================
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*/
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side_t *SelectSplitSide (bspbrush_t *brushes, node_t *node)
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{
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int value, bestvalue;
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bspbrush_t *brush, *test;
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side_t *side, *bestside;
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int i, j, pass, numpasses;
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int pnum;
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int s;
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int front, back, both, facing, splits;
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int bsplits;
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int bestsplits;
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int epsilonbrush;
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qboolean hintsplit;
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bestside = NULL;
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bestvalue = -99999;
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bestsplits = 0;
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// the search order goes: visible-structural, visible-detail,
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// nonvisible-structural, nonvisible-detail.
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// If any valid plane is available in a pass, no further
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// passes will be tried.
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numpasses = 4;
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for (pass = 0 ; pass < numpasses ; pass++)
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{
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for (brush = brushes ; brush ; brush=brush->next)
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{
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if ( (pass & 1) && !(brush->original->contents & CONTENTS_DETAIL) )
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continue;
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if ( !(pass & 1) && (brush->original->contents & CONTENTS_DETAIL) )
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continue;
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for (i=0 ; i<brush->numsides ; i++)
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{
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side = brush->sides + i;
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if (side->bevel)
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continue; // never use a bevel as a spliter
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if (!side->winding)
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continue; // nothing visible, so it can't split
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if (side->texinfo == TEXINFO_NODE)
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continue; // allready a node splitter
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if (side->tested)
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continue; // we allready have metrics for this plane
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if (side->surf & SURF_SKIP)
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continue; // skip surfaces are never chosen
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if ( side->visible ^ (pass<2) )
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continue; // only check visible faces on first pass
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pnum = side->planenum;
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pnum &= ~1; // allways use positive facing plane
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CheckPlaneAgainstParents (pnum, node);
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if (!CheckPlaneAgainstVolume (pnum, node))
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continue; // would produce a tiny volume
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front = 0;
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back = 0;
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both = 0;
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facing = 0;
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splits = 0;
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epsilonbrush = 0;
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for (test = brushes ; test ; test=test->next)
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{
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s = TestBrushToPlanenum (test, pnum, &bsplits, &hintsplit, &epsilonbrush);
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splits += bsplits;
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if (bsplits && (s&PSIDE_FACING) )
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Error ("PSIDE_FACING with splits");
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test->testside = s;
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// if the brush shares this face, don't bother
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// testing that facenum as a splitter again
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if (s & PSIDE_FACING)
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{
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facing++;
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for (j=0 ; j<test->numsides ; j++)
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{
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if ( (test->sides[j].planenum&~1) == pnum)
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test->sides[j].tested = true;
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}
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}
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if (s & PSIDE_FRONT)
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front++;
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if (s & PSIDE_BACK)
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back++;
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if (s == PSIDE_BOTH)
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both++;
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}
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// give a value estimate for using this plane
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value = 5*facing - 5*splits - abs(front-back);
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// value = -5*splits;
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// value = 5*facing - 5*splits;
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if (mapplanes[pnum].type < 3)
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value+=5; // axial is better
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value -= epsilonbrush*1000; // avoid!
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// never split a hint side except with another hint
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if (hintsplit && !(side->surf & SURF_HINT) )
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value = -9999999;
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// save off the side test so we don't need
|
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// to recalculate it when we actually seperate
|
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// the brushes
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if (value > bestvalue)
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{
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bestvalue = value;
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bestside = side;
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bestsplits = splits;
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for (test = brushes ; test ; test=test->next)
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test->side = test->testside;
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}
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}
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}
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// if we found a good plane, don't bother trying any
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// other passes
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if (bestside)
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{
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if (pass > 1)
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{
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if (numthreads == 1)
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c_nonvis++;
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}
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if (pass > 0)
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node->detail_seperator = true; // not needed for vis
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break;
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}
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}
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//
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// clear all the tested flags we set
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//
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for (brush = brushes ; brush ; brush=brush->next)
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{
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for (i=0 ; i<brush->numsides ; i++)
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brush->sides[i].tested = false;
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}
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return bestside;
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}
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/*
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==================
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BrushMostlyOnSide
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==================
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*/
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int BrushMostlyOnSide (bspbrush_t *brush, plane_t *plane)
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{
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int i, j;
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winding_t *w;
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vec_t d, max;
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int side;
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max = 0;
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side = PSIDE_FRONT;
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for (i=0 ; i<brush->numsides ; i++)
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{
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w = brush->sides[i].winding;
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if (!w)
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continue;
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for (j=0 ; j<w->numpoints ; j++)
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{
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d = DotProduct (w->p[j], plane->normal) - plane->dist;
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if (d > max)
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{
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max = d;
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side = PSIDE_FRONT;
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}
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if (-d > max)
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{
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max = -d;
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side = PSIDE_BACK;
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}
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}
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}
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return side;
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}
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|
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/*
|
|
================
|
|
SplitBrush
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|
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Generates two new brushes, leaving the original
|
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unchanged
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================
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*/
|
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void SplitBrush (bspbrush_t *brush, int planenum,
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bspbrush_t **front, bspbrush_t **back)
|
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{
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bspbrush_t *b[2];
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int i, j;
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winding_t *w, *cw[2], *midwinding;
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plane_t *plane, *plane2;
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side_t *s, *cs;
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float d, d_front, d_back;
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*front = *back = NULL;
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plane = &mapplanes[planenum];
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|
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// check all points
|
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d_front = d_back = 0;
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for (i=0 ; i<brush->numsides ; i++)
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{
|
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w = brush->sides[i].winding;
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if (!w)
|
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continue;
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for (j=0 ; j<w->numpoints ; j++)
|
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{
|
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d = DotProduct (w->p[j], plane->normal) - plane->dist;
|
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if (d > 0 && d > d_front)
|
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d_front = d;
|
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if (d < 0 && d < d_back)
|
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d_back = d;
|
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}
|
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}
|
|
if (d_front < 0.1) // PLANESIDE_EPSILON)
|
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{ // only on back
|
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*back = CopyBrush (brush);
|
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return;
|
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}
|
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if (d_back > -0.1) // PLANESIDE_EPSILON)
|
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{ // only on front
|
|
*front = CopyBrush (brush);
|
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return;
|
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}
|
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|
|
// create a new winding from the split plane
|
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|
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w = BaseWindingForPlane (plane->normal, plane->dist);
|
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for (i=0 ; i<brush->numsides && w ; i++)
|
|
{
|
|
plane2 = &mapplanes[brush->sides[i].planenum ^ 1];
|
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ChopWindingInPlace (&w, plane2->normal, plane2->dist, 0); // PLANESIDE_EPSILON);
|
|
}
|
|
|
|
if (!w || WindingIsTiny (w) )
|
|
{ // the brush isn't really split
|
|
int side;
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|
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side = BrushMostlyOnSide (brush, plane);
|
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if (side == PSIDE_FRONT)
|
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*front = CopyBrush (brush);
|
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if (side == PSIDE_BACK)
|
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*back = CopyBrush (brush);
|
|
return;
|
|
}
|
|
|
|
if (WindingIsHuge (w))
|
|
{
|
|
Sys_FPrintf( SYS_VRB, "WARNING: huge winding\n");
|
|
}
|
|
|
|
midwinding = w;
|
|
|
|
// split it for real
|
|
|
|
for (i=0 ; i<2 ; i++)
|
|
{
|
|
b[i] = AllocBrush (brush->numsides+1);
|
|
b[i]->original = brush->original;
|
|
}
|
|
|
|
// split all the current windings
|
|
|
|
for (i=0 ; i<brush->numsides ; i++)
|
|
{
|
|
s = &brush->sides[i];
|
|
w = s->winding;
|
|
if (!w)
|
|
continue;
|
|
ClipWindingEpsilon (w, plane->normal, plane->dist,
|
|
0 /*PLANESIDE_EPSILON*/, &cw[0], &cw[1]);
|
|
for (j=0 ; j<2 ; j++)
|
|
{
|
|
if (!cw[j])
|
|
continue;
|
|
#if 0
|
|
if (WindingIsTiny (cw[j]))
|
|
{
|
|
FreeWinding (cw[j]);
|
|
continue;
|
|
}
|
|
#endif
|
|
cs = &b[j]->sides[b[j]->numsides];
|
|
b[j]->numsides++;
|
|
*cs = *s;
|
|
// cs->planenum = s->planenum;
|
|
// cs->texinfo = s->texinfo;
|
|
// cs->visible = s->visible;
|
|
// cs->original = s->original;
|
|
cs->winding = cw[j];
|
|
cs->tested = false;
|
|
}
|
|
}
|
|
|
|
|
|
// see if we have valid polygons on both sides
|
|
|
|
for (i=0 ; i<2 ; i++)
|
|
{
|
|
BoundBrush (b[i]);
|
|
for (j=0 ; j<3 ; j++)
|
|
{
|
|
if (b[i]->mins[j] < -4096 || b[i]->maxs[j] > 4096)
|
|
{
|
|
Sys_FPrintf( SYS_VRB, "bogus brush after clip\n");
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (b[i]->numsides < 3 || j < 3)
|
|
{
|
|
FreeBrush (b[i]);
|
|
b[i] = NULL;
|
|
}
|
|
}
|
|
|
|
if ( !(b[0] && b[1]) )
|
|
{
|
|
if (!b[0] && !b[1])
|
|
Sys_FPrintf( SYS_VRB, "split removed brush\n");
|
|
else
|
|
Sys_FPrintf( SYS_VRB, "split not on both sides\n");
|
|
if (b[0])
|
|
{
|
|
FreeBrush (b[0]);
|
|
*front = CopyBrush (brush);
|
|
}
|
|
if (b[1])
|
|
{
|
|
FreeBrush (b[1]);
|
|
*back = CopyBrush (brush);
|
|
}
|
|
return;
|
|
}
|
|
|
|
// add the midwinding to both sides
|
|
for (i=0 ; i<2 ; i++)
|
|
{
|
|
cs = &b[i]->sides[b[i]->numsides];
|
|
b[i]->numsides++;
|
|
|
|
cs->planenum = planenum^i^1;
|
|
cs->texinfo = TEXINFO_NODE;
|
|
cs->visible = false;
|
|
cs->tested = false;
|
|
if (i==0)
|
|
cs->winding = CopyWinding (midwinding);
|
|
else
|
|
cs->winding = midwinding;
|
|
}
|
|
|
|
{
|
|
vec_t v1;
|
|
int i;
|
|
|
|
for (i=0 ; i<2 ; i++)
|
|
{
|
|
v1 = BrushVolume (b[i]);
|
|
if (v1 < 1.0)
|
|
{
|
|
FreeBrush (b[i]);
|
|
b[i] = NULL;
|
|
Sys_FPrintf( SYS_VRB, "tiny volume after clip\n");
|
|
}
|
|
}
|
|
}
|
|
|
|
*front = b[0];
|
|
*back = b[1];
|
|
}
|
|
|
|
/*
|
|
================
|
|
SplitBrushList
|
|
================
|
|
*/
|
|
void SplitBrushList (bspbrush_t *brushes,
|
|
node_t *node, bspbrush_t **front, bspbrush_t **back)
|
|
{
|
|
bspbrush_t *brush, *newbrush, *newbrush2;
|
|
side_t *side;
|
|
int sides;
|
|
int i;
|
|
|
|
*front = *back = NULL;
|
|
|
|
for (brush = brushes ; brush ; brush=brush->next)
|
|
{
|
|
sides = brush->side;
|
|
|
|
if (sides == PSIDE_BOTH)
|
|
{ // split into two brushes
|
|
SplitBrush (brush, node->planenum, &newbrush, &newbrush2);
|
|
if (newbrush)
|
|
{
|
|
newbrush->next = *front;
|
|
*front = newbrush;
|
|
}
|
|
if (newbrush2)
|
|
{
|
|
newbrush2->next = *back;
|
|
*back = newbrush2;
|
|
}
|
|
continue;
|
|
}
|
|
|
|
newbrush = CopyBrush (brush);
|
|
|
|
// if the planenum is actualy a part of the brush
|
|
// find the plane and flag it as used so it won't be tried
|
|
// as a splitter again
|
|
if (sides & PSIDE_FACING)
|
|
{
|
|
for (i=0 ; i<newbrush->numsides ; i++)
|
|
{
|
|
side = newbrush->sides + i;
|
|
if ( (side->planenum& ~1) == node->planenum)
|
|
side->texinfo = TEXINFO_NODE;
|
|
}
|
|
}
|
|
|
|
|
|
if (sides & PSIDE_FRONT)
|
|
{
|
|
newbrush->next = *front;
|
|
*front = newbrush;
|
|
continue;
|
|
}
|
|
if (sides & PSIDE_BACK)
|
|
{
|
|
newbrush->next = *back;
|
|
*back = newbrush;
|
|
continue;
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
/*
|
|
================
|
|
BuildTree_r
|
|
================
|
|
*/
|
|
node_t *BuildTree_r (node_t *node, bspbrush_t *brushes)
|
|
{
|
|
node_t *newnode;
|
|
side_t *bestside;
|
|
int i;
|
|
bspbrush_t *children[2];
|
|
|
|
if (numthreads == 1)
|
|
c_nodes++;
|
|
|
|
if (drawflag)
|
|
DrawBrushList (brushes, node);
|
|
|
|
// find the best plane to use as a splitter
|
|
bestside = SelectSplitSide (brushes, node);
|
|
if (!bestside)
|
|
{
|
|
// leaf node
|
|
node->side = NULL;
|
|
node->planenum = -1;
|
|
LeafNode (node, brushes);
|
|
return node;
|
|
}
|
|
|
|
// this is a splitplane node
|
|
node->side = bestside;
|
|
node->planenum = bestside->planenum & ~1; // always use front facing
|
|
|
|
SplitBrushList (brushes, node, &children[0], &children[1]);
|
|
FreeBrushList (brushes);
|
|
|
|
// allocate children before recursing
|
|
for (i=0 ; i<2 ; i++)
|
|
{
|
|
newnode = AllocNode ();
|
|
newnode->parent = node;
|
|
node->children[i] = newnode;
|
|
}
|
|
|
|
SplitBrush (node->volume, node->planenum, &node->children[0]->volume,
|
|
&node->children[1]->volume);
|
|
|
|
// recursively process children
|
|
for (i=0 ; i<2 ; i++)
|
|
{
|
|
node->children[i] = BuildTree_r (node->children[i], children[i]);
|
|
}
|
|
|
|
return node;
|
|
}
|
|
|
|
//===========================================================
|
|
|
|
/*
|
|
=================
|
|
BrushBSP
|
|
|
|
The incoming list will be freed before exiting
|
|
=================
|
|
*/
|
|
tree_t *BrushBSP (bspbrush_t *brushlist, vec3_t mins, vec3_t maxs)
|
|
{
|
|
node_t *node;
|
|
bspbrush_t *b;
|
|
int c_faces, c_nonvisfaces;
|
|
int c_brushes;
|
|
tree_t *tree;
|
|
int i;
|
|
vec_t volume;
|
|
|
|
Sys_FPrintf( SYS_VRB, "--- BrushBSP ---\n");
|
|
|
|
tree = AllocTree ();
|
|
|
|
c_faces = 0;
|
|
c_nonvisfaces = 0;
|
|
c_brushes = 0;
|
|
for (b=brushlist ; b ; b=b->next)
|
|
{
|
|
c_brushes++;
|
|
|
|
volume = BrushVolume (b);
|
|
if (volume < microvolume)
|
|
{
|
|
Sys_Printf ("WARNING: entity %i, brush %i: microbrush\n",
|
|
b->original->entitynum, b->original->brushnum);
|
|
}
|
|
|
|
for (i=0 ; i<b->numsides ; i++)
|
|
{
|
|
if (b->sides[i].bevel)
|
|
continue;
|
|
if (!b->sides[i].winding)
|
|
continue;
|
|
if (b->sides[i].texinfo == TEXINFO_NODE)
|
|
continue;
|
|
if (b->sides[i].visible)
|
|
c_faces++;
|
|
else
|
|
c_nonvisfaces++;
|
|
}
|
|
|
|
AddPointToBounds (b->mins, tree->mins, tree->maxs);
|
|
AddPointToBounds (b->maxs, tree->mins, tree->maxs);
|
|
}
|
|
|
|
Sys_FPrintf( SYS_VRB, "%5i brushes\n", c_brushes);
|
|
Sys_FPrintf( SYS_VRB, "%5i visible faces\n", c_faces);
|
|
Sys_FPrintf( SYS_VRB, "%5i nonvisible faces\n", c_nonvisfaces);
|
|
|
|
c_nodes = 0;
|
|
c_nonvis = 0;
|
|
node = AllocNode ();
|
|
|
|
node->volume = BrushFromBounds (mins, maxs);
|
|
|
|
tree->headnode = node;
|
|
|
|
node = BuildTree_r (node, brushlist);
|
|
Sys_FPrintf( SYS_VRB, "%5i visible nodes\n", c_nodes/2 - c_nonvis);
|
|
Sys_FPrintf( SYS_VRB, "%5i nonvis nodes\n", c_nonvis);
|
|
Sys_FPrintf( SYS_VRB, "%5i leafs\n", (c_nodes+1)/2);
|
|
#if 0
|
|
{ // debug code
|
|
static node_t *tnode;
|
|
vec3_t p;
|
|
|
|
p[0] = -1469;
|
|
p[1] = -118;
|
|
p[2] = 119;
|
|
tnode = PointInLeaf (tree->headnode, p);
|
|
Sys_Printf ("contents: %i\n", tnode->contents);
|
|
p[0] = 0;
|
|
}
|
|
#endif
|
|
return tree;
|
|
}
|
|
|