153 lines
4.0 KiB
C
153 lines
4.0 KiB
C
/* Copyright (C) 1996-1997 Id Software, Inc.
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This program 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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This program 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 this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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See file, 'COPYING', for details.
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*/
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// vis.h
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#include <common/cmdlib.h>
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#include <common/mathlib.h>
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#include <common/bspfile.h>
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#include <vis/leafbits.h>
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#define PORTALFILE "PRT1"
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#define PORTALFILE2 "PRT2"
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#define ON_EPSILON 0.1
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typedef struct {
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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_WINDING 64
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#define MAX_WINDING_FIXED 24
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typedef struct {
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int numpoints;
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vec3_t origin; // Bounding sphere for fast clipping tests
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vec_t radius; // Not updated, so won't shrink when clipping
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vec3_t points[MAX_WINDING_FIXED]; // variable sized
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} winding_t;
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winding_t *NewWinding(int points);
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winding_t *CopyWinding(const winding_t *w);
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void PlaneFromWinding(const winding_t *w, plane_t *plane);
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qboolean PlaneCompare(plane_t *p1, plane_t *p2);
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typedef enum { pstat_none = 0, pstat_working, pstat_done } pstatus_t;
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typedef struct {
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plane_t plane; // normal pointing into neighbor
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int leaf; // neighbor
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winding_t *winding;
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pstatus_t status;
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leafbits_t *visbits;
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leafbits_t *mightsee;
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int nummightsee;
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int numcansee;
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} portal_t;
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typedef struct seperating_plane_s {
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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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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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/* Increased MAX_PORTALS_ON_LEAF from 128 */
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#define MAX_PORTALS_ON_LEAF 256
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typedef struct leaf_s {
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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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#define MAX_SEPARATORS MAX_WINDING
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#define STACK_WINDINGS 3 // source, pass and a temp for clipping
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typedef struct pstack_s {
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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, *pass;
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winding_t windings[STACK_WINDINGS]; // Fixed size windings
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int freewindings[STACK_WINDINGS];
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plane_t portalplane;
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leafbits_t *mightsee; // bit string
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plane_t separators[2][MAX_SEPARATORS]; /* Separator cache */
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int numseparators[2];
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} pstack_t;
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winding_t *AllocStackWinding(pstack_t *stack);
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void FreeStackWinding(winding_t *w, pstack_t *stack);
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winding_t *ClipStackWinding(winding_t *in, pstack_t *stack, plane_t *split);
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typedef struct {
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leafbits_t *leafvis;
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portal_t *base;
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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 portalleafs;
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extern int portalleafs_real;
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extern portal_t *portals;
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extern leaf_t *leafs;
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extern int c_noclip;
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extern int c_portaltest, c_portalpass, c_portalcheck;
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extern int c_vistest, c_mighttest;
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extern unsigned long c_chains;
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extern qboolean showgetleaf;
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extern int testlevel;
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extern qboolean ambientsky;
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extern qboolean ambientwater;
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extern qboolean ambientslime;
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extern qboolean ambientlava;
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extern byte *uncompressed;
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extern int leafbytes;
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extern int leafbytes_real;
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extern int leaflongs;
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extern char sourcefile[1024];
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extern char portalfile[1024];
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extern char statefile[1024];
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extern char statetmpfile[1024];
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void BasePortalVis(void);
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void PortalFlow(portal_t *p);
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void CalcAmbientSounds(bspdata_t *bsp);
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extern double starttime, endtime, statetime;
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void SaveVisState(void);
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qboolean LoadVisState(void);
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/* Print winding/leaf info for debugging */
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void LogWinding(const winding_t *w);
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void LogLeaf(const leaf_t *leaf);
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