mirror of
https://github.com/UberGames/GtkRadiant.git
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149 lines
3.4 KiB
C
149 lines
3.4 KiB
C
/*
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===========================================================================
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Copyright (C) 1997-2006 Id Software, Inc.
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This file is part of Quake 2 Tools source code.
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Quake 2 Tools source code is free software; you can redistribute it
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and/or modify it under the terms of the GNU General Public License as
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published by the Free Software Foundation; either version 2 of the License,
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or (at your option) any later version.
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Quake 2 Tools source code is distributed in the hope that it will be
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useful, 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 Quake 2 Tools source code; 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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*/
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#include "cmdlib.h"
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#include "mathlib.h"
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#include "bspfile.h"
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#define MAX_PORTALS 32768
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#define PORTALFILE "PRT1"
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#define ON_EPSILON 0.1
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typedef struct
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{
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vec3_t normal;
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float dist;
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} plane_t;
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#define MAX_POINTS_ON_WINDING 64
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#define MAX_POINTS_ON_FIXED_WINDING 12
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typedef struct
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{
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qboolean original; // don't free, it's part of the portal
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int numpoints;
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vec3_t points[MAX_POINTS_ON_FIXED_WINDING]; // variable sized
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} winding_t;
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winding_t *NewWinding (int points);
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void FreeWinding (winding_t *w);
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winding_t *CopyWinding (winding_t *w);
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typedef enum {stat_none, stat_working, stat_done} vstatus_t;
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typedef struct
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{
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plane_t plane; // normal pointing into neighbor
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int leaf; // neighbor
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vec3_t origin; // for fast clip testing
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float radius;
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winding_t *winding;
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vstatus_t status;
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byte *portalfront; // [portals], preliminary
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byte *portalflood; // [portals], intermediate
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byte *portalvis; // [portals], final
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int nummightsee; // bit count on portalflood for sort
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} portal_t;
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typedef struct seperating_plane_s
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{
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struct seperating_plane_s *next;
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plane_t plane; // from portal is on positive side
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} sep_t;
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typedef struct passage_s
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{
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struct passage_s *next;
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int from, to; // leaf numbers
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sep_t *planes;
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} passage_t;
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#define MAX_PORTALS_ON_LEAF 128
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typedef struct leaf_s
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{
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int numportals;
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passage_t *passages;
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portal_t *portals[MAX_PORTALS_ON_LEAF];
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} leaf_t;
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typedef struct pstack_s
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{
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byte mightsee[MAX_PORTALS/8]; // bit string
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struct pstack_s *next;
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leaf_t *leaf;
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portal_t *portal; // portal exiting
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winding_t *source;
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winding_t *pass;
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winding_t windings[3]; // source, pass, temp in any order
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int freewindings[3];
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plane_t portalplane;
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} pstack_t;
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typedef struct
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{
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portal_t *base;
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int c_chains;
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pstack_t pstack_head;
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} threaddata_t;
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extern int numportals;
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extern int portalclusters;
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extern portal_t *portals;
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extern leaf_t *leafs;
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extern int c_portaltest, c_portalpass, c_portalcheck;
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extern int c_portalskip, c_leafskip;
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extern int c_vistest, c_mighttest;
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extern int c_chains;
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extern byte *vismap, *vismap_p, *vismap_end; // past visfile
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extern int testlevel;
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extern byte *uncompressed;
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extern int leafbytes, leaflongs;
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extern int portalbytes, portallongs;
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void LeafFlow (int leafnum);
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void BasePortalVis (int portalnum);
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void BetterPortalVis (int portalnum);
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void PortalFlow (int portalnum);
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extern portal_t *sorted_portals[MAX_MAP_PORTALS*2];
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int CountBits (byte *bits, int numbits);
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