mirror of
https://git.code.sf.net/p/quake/quake2forge
synced 2024-12-13 22:21:34 +00:00
34c5702da6
now. However, tags of gzio_pre_revoke (before) and gzio_revoke (after) will help get it back if/when we decide to work on it again.
1770 lines
35 KiB
C
1770 lines
35 KiB
C
/*
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Copyright (C) 1997-2001 Id Software, Inc.
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (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.
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See the 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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*/
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// cmodel.c -- model loading
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#include "qcommon.h"
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typedef struct
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{
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cplane_t *plane;
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int children[2]; // negative numbers are leafs
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} cnode_t;
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typedef struct
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{
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cplane_t *plane;
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mapsurface_t *surface;
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} cbrushside_t;
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typedef struct
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{
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int contents;
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int cluster;
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int area;
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unsigned short firstleafbrush;
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unsigned short numleafbrushes;
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} cleaf_t;
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typedef struct
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{
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int contents;
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int numsides;
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int firstbrushside;
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int checkcount; // to avoid repeated testings
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} cbrush_t;
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typedef struct
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{
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int numareaportals;
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int firstareaportal;
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int floodnum; // if two areas have equal floodnums, they are connected
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int floodvalid;
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} carea_t;
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int checkcount;
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char map_name[MAX_QPATH];
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int numbrushsides;
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cbrushside_t map_brushsides[MAX_MAP_BRUSHSIDES];
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int numtexinfo;
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mapsurface_t map_surfaces[MAX_MAP_TEXINFO];
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int numplanes;
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cplane_t map_planes[MAX_MAP_PLANES+6]; // extra for box hull
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int numnodes;
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cnode_t map_nodes[MAX_MAP_NODES+6]; // extra for box hull
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int numleafs = 1; // allow leaf funcs to be called without a map
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cleaf_t map_leafs[MAX_MAP_LEAFS];
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int emptyleaf, solidleaf;
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int numleafbrushes;
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unsigned short map_leafbrushes[MAX_MAP_LEAFBRUSHES];
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int numcmodels;
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cmodel_t map_cmodels[MAX_MAP_MODELS];
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int numbrushes;
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cbrush_t map_brushes[MAX_MAP_BRUSHES];
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int numvisibility;
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byte map_visibility[MAX_MAP_VISIBILITY];
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dvis_t *map_vis = (dvis_t *)map_visibility;
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int numentitychars;
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char map_entitystring[MAX_MAP_ENTSTRING];
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int numareas = 1;
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carea_t map_areas[MAX_MAP_AREAS];
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int numareaportals;
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dareaportal_t map_areaportals[MAX_MAP_AREAPORTALS];
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int numclusters = 1;
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mapsurface_t nullsurface;
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int floodvalid;
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qboolean portalopen[MAX_MAP_AREAPORTALS];
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cvar_t *map_noareas;
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void CM_InitBoxHull (void);
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void FloodAreaConnections (void);
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int c_pointcontents;
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int c_traces, c_brush_traces;
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/*
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===============================================================================
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MAP LOADING
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===============================================================================
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*/
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byte *cmod_base;
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/*
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=================
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CMod_LoadSubmodels
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=================
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*/
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void CMod_LoadSubmodels (lump_t *l)
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{
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dmodel_t *in;
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cmodel_t *out;
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int i, j, count;
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in = (void *)(cmod_base + l->fileofs);
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if (l->filelen % sizeof(*in))
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Com_Error (ERR_DROP, "MOD_LoadBmodel: funny lump size");
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count = l->filelen / sizeof(*in);
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if (count < 1)
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Com_Error (ERR_DROP, "Map with no models");
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if (count > MAX_MAP_MODELS)
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Com_Error (ERR_DROP, "Map has too many models");
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numcmodels = count;
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for ( i=0 ; i<count ; i++, in++, out++)
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{
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out = &map_cmodels[i];
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for (j=0 ; j<3 ; j++)
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{ // spread the mins / maxs by a pixel
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out->mins[j] = LittleFloat (in->mins[j]) - 1;
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out->maxs[j] = LittleFloat (in->maxs[j]) + 1;
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out->origin[j] = LittleFloat (in->origin[j]);
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}
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out->headnode = LittleLong (in->headnode);
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}
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}
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/*
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=================
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CMod_LoadSurfaces
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=================
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*/
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void CMod_LoadSurfaces (lump_t *l)
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{
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texinfo_t *in;
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mapsurface_t *out;
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int i, count;
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in = (void *)(cmod_base + l->fileofs);
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if (l->filelen % sizeof(*in))
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Com_Error (ERR_DROP, "MOD_LoadBmodel: funny lump size");
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count = l->filelen / sizeof(*in);
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if (count < 1)
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Com_Error (ERR_DROP, "Map with no surfaces");
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if (count > MAX_MAP_TEXINFO)
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Com_Error (ERR_DROP, "Map has too many surfaces");
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numtexinfo = count;
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out = map_surfaces;
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for ( i=0 ; i<count ; i++, in++, out++)
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{
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strncpy (out->c.name, in->texture, sizeof(out->c.name)-1);
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strncpy (out->rname, in->texture, sizeof(out->rname)-1);
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out->c.flags = LittleLong (in->flags);
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out->c.value = LittleLong (in->value);
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}
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}
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/*
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=================
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CMod_LoadNodes
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=================
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*/
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void CMod_LoadNodes (lump_t *l)
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{
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dnode_t *in;
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int child;
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cnode_t *out;
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int i, j, count;
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in = (void *)(cmod_base + l->fileofs);
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if (l->filelen % sizeof(*in))
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Com_Error (ERR_DROP, "MOD_LoadBmodel: funny lump size");
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count = l->filelen / sizeof(*in);
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if (count < 1)
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Com_Error (ERR_DROP, "Map has no nodes");
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if (count > MAX_MAP_NODES)
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Com_Error (ERR_DROP, "Map has too many nodes");
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out = map_nodes;
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numnodes = count;
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for (i=0 ; i<count ; i++, out++, in++)
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{
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out->plane = map_planes + LittleLong(in->planenum);
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for (j=0 ; j<2 ; j++)
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{
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child = LittleLong (in->children[j]);
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out->children[j] = child;
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}
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}
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}
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/*
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=================
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CMod_LoadBrushes
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=================
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*/
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void CMod_LoadBrushes (lump_t *l)
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{
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dbrush_t *in;
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cbrush_t *out;
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int i, count;
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in = (void *)(cmod_base + l->fileofs);
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if (l->filelen % sizeof(*in))
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Com_Error (ERR_DROP, "MOD_LoadBmodel: funny lump size");
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count = l->filelen / sizeof(*in);
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if (count > MAX_MAP_BRUSHES)
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Com_Error (ERR_DROP, "Map has too many brushes");
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out = map_brushes;
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numbrushes = count;
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for (i=0 ; i<count ; i++, out++, in++)
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{
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out->firstbrushside = LittleLong(in->firstside);
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out->numsides = LittleLong(in->numsides);
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out->contents = LittleLong(in->contents);
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}
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}
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/*
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=================
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CMod_LoadLeafs
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=================
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*/
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void CMod_LoadLeafs (lump_t *l)
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{
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int i;
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cleaf_t *out;
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dleaf_t *in;
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int count;
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in = (void *)(cmod_base + l->fileofs);
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if (l->filelen % sizeof(*in))
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Com_Error (ERR_DROP, "MOD_LoadBmodel: funny lump size");
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count = l->filelen / sizeof(*in);
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if (count < 1)
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Com_Error (ERR_DROP, "Map with no leafs");
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// need to save space for box planes
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if (count > MAX_MAP_PLANES)
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Com_Error (ERR_DROP, "Map has too many planes");
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out = map_leafs;
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numleafs = count;
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numclusters = 0;
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for ( i=0 ; i<count ; i++, in++, out++)
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{
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out->contents = LittleLong (in->contents);
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out->cluster = LittleShort (in->cluster);
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out->area = LittleShort (in->area);
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out->firstleafbrush = LittleShort (in->firstleafbrush);
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out->numleafbrushes = LittleShort (in->numleafbrushes);
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if (out->cluster >= numclusters)
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numclusters = out->cluster + 1;
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}
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if (map_leafs[0].contents != CONTENTS_SOLID)
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Com_Error (ERR_DROP, "Map leaf 0 is not CONTENTS_SOLID");
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solidleaf = 0;
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emptyleaf = -1;
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for (i=1 ; i<numleafs ; i++)
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{
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if (!map_leafs[i].contents)
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{
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emptyleaf = i;
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break;
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}
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}
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if (emptyleaf == -1)
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Com_Error (ERR_DROP, "Map does not have an empty leaf");
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}
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/*
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=================
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CMod_LoadPlanes
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=================
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*/
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void CMod_LoadPlanes (lump_t *l)
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{
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int i, j;
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cplane_t *out;
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dplane_t *in;
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int count;
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int bits;
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in = (void *)(cmod_base + l->fileofs);
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if (l->filelen % sizeof(*in))
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Com_Error (ERR_DROP, "MOD_LoadBmodel: funny lump size");
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count = l->filelen / sizeof(*in);
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if (count < 1)
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Com_Error (ERR_DROP, "Map with no planes");
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// need to save space for box planes
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if (count > MAX_MAP_PLANES)
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Com_Error (ERR_DROP, "Map has too many planes");
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out = map_planes;
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numplanes = count;
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for ( i=0 ; i<count ; i++, in++, out++)
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{
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bits = 0;
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for (j=0 ; j<3 ; j++)
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{
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out->normal[j] = LittleFloat (in->normal[j]);
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if (out->normal[j] < 0)
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bits |= 1<<j;
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}
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out->dist = LittleFloat (in->dist);
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out->type = LittleLong (in->type);
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out->signbits = bits;
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}
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}
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/*
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=================
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CMod_LoadLeafBrushes
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=================
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*/
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void CMod_LoadLeafBrushes (lump_t *l)
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{
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int i;
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unsigned short *out;
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unsigned short *in;
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int count;
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in = (void *)(cmod_base + l->fileofs);
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if (l->filelen % sizeof(*in))
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Com_Error (ERR_DROP, "MOD_LoadBmodel: funny lump size");
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count = l->filelen / sizeof(*in);
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if (count < 1)
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Com_Error (ERR_DROP, "Map with no planes");
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// need to save space for box planes
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if (count > MAX_MAP_LEAFBRUSHES)
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Com_Error (ERR_DROP, "Map has too many leafbrushes");
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out = map_leafbrushes;
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numleafbrushes = count;
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for ( i=0 ; i<count ; i++, in++, out++)
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*out = LittleShort (*in);
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}
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/*
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=================
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CMod_LoadBrushSides
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=================
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*/
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void CMod_LoadBrushSides (lump_t *l)
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{
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int i, j;
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cbrushside_t *out;
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dbrushside_t *in;
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int count;
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int num;
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in = (void *)(cmod_base + l->fileofs);
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if (l->filelen % sizeof(*in))
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Com_Error (ERR_DROP, "MOD_LoadBmodel: funny lump size");
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count = l->filelen / sizeof(*in);
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// need to save space for box planes
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if (count > MAX_MAP_BRUSHSIDES)
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Com_Error (ERR_DROP, "Map has too many planes");
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out = map_brushsides;
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numbrushsides = count;
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for ( i=0 ; i<count ; i++, in++, out++)
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{
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num = LittleShort (in->planenum);
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out->plane = &map_planes[num];
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j = LittleShort (in->texinfo);
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if (j >= numtexinfo)
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Com_Error (ERR_DROP, "Bad brushside texinfo");
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out->surface = &map_surfaces[j];
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}
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}
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/*
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=================
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CMod_LoadAreas
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=================
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*/
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void CMod_LoadAreas (lump_t *l)
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{
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int i;
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carea_t *out;
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darea_t *in;
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int count;
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in = (void *)(cmod_base + l->fileofs);
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if (l->filelen % sizeof(*in))
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Com_Error (ERR_DROP, "MOD_LoadBmodel: funny lump size");
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count = l->filelen / sizeof(*in);
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if (count > MAX_MAP_AREAS)
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Com_Error (ERR_DROP, "Map has too many areas");
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out = map_areas;
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numareas = count;
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for ( i=0 ; i<count ; i++, in++, out++)
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{
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out->numareaportals = LittleLong (in->numareaportals);
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out->firstareaportal = LittleLong (in->firstareaportal);
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out->floodvalid = 0;
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out->floodnum = 0;
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}
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}
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/*
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=================
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CMod_LoadAreaPortals
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=================
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*/
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void CMod_LoadAreaPortals (lump_t *l)
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{
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int i;
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dareaportal_t *out;
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dareaportal_t *in;
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int count;
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in = (void *)(cmod_base + l->fileofs);
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if (l->filelen % sizeof(*in))
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Com_Error (ERR_DROP, "MOD_LoadBmodel: funny lump size");
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count = l->filelen / sizeof(*in);
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if (count > MAX_MAP_AREAS)
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Com_Error (ERR_DROP, "Map has too many areas");
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out = map_areaportals;
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numareaportals = count;
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for ( i=0 ; i<count ; i++, in++, out++)
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{
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out->portalnum = LittleLong (in->portalnum);
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out->otherarea = LittleLong (in->otherarea);
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}
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}
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/*
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=================
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CMod_LoadVisibility
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=================
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*/
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void CMod_LoadVisibility (lump_t *l)
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{
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int i;
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numvisibility = l->filelen;
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if (l->filelen > MAX_MAP_VISIBILITY)
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Com_Error (ERR_DROP, "Map has too large visibility lump");
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memcpy (map_visibility, cmod_base + l->fileofs, l->filelen);
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map_vis->numclusters = LittleLong (map_vis->numclusters);
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for (i=0 ; i<map_vis->numclusters ; i++)
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{
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map_vis->bitofs[i][0] = LittleLong (map_vis->bitofs[i][0]);
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map_vis->bitofs[i][1] = LittleLong (map_vis->bitofs[i][1]);
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}
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}
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/*
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=================
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CMod_LoadEntityString
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=================
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*/
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void CMod_LoadEntityString (lump_t *l)
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{
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numentitychars = l->filelen;
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if (l->filelen > MAX_MAP_ENTSTRING)
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Com_Error (ERR_DROP, "Map has too large entity lump");
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memcpy (map_entitystring, cmod_base + l->fileofs, l->filelen);
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}
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/*
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==================
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CM_LoadMap
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Loads in the map and all submodels
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==================
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*/
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cmodel_t *CM_LoadMap (char *name, qboolean clientload, unsigned *checksum)
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{
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unsigned *buf;
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int i;
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dheader_t header;
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int length;
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static unsigned last_checksum;
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map_noareas = Cvar_Get ("map_noareas", "0", 0);
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if ( !strcmp (map_name, name) && (clientload || !Cvar_VariableValue ("flushmap")) )
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{
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*checksum = last_checksum;
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if (!clientload)
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{
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memset (portalopen, 0, sizeof(portalopen));
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FloodAreaConnections ();
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}
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return &map_cmodels[0]; // still have the right version
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}
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// free old stuff
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numplanes = 0;
|
|
numnodes = 0;
|
|
numleafs = 0;
|
|
numcmodels = 0;
|
|
numvisibility = 0;
|
|
numentitychars = 0;
|
|
map_entitystring[0] = 0;
|
|
map_name[0] = 0;
|
|
|
|
if (!name || !name[0])
|
|
{
|
|
numleafs = 1;
|
|
numclusters = 1;
|
|
numareas = 1;
|
|
*checksum = 0;
|
|
return &map_cmodels[0]; // cinematic servers won't have anything at all
|
|
}
|
|
|
|
//
|
|
// load the file
|
|
//
|
|
length = FS_LoadFile (name, (void **)&buf);
|
|
if (!buf)
|
|
Com_Error (ERR_DROP, "Couldn't load %s", name);
|
|
|
|
last_checksum = LittleLong (Com_BlockChecksum (buf, length));
|
|
*checksum = last_checksum;
|
|
|
|
header = *(dheader_t *)buf;
|
|
for (i=0 ; i<sizeof(dheader_t)/4 ; i++)
|
|
((int *)&header)[i] = LittleLong ( ((int *)&header)[i]);
|
|
|
|
if (header.version != BSPVERSION)
|
|
Com_Error (ERR_DROP, "CMod_LoadBrushModel: %s has wrong version number (%i should be %i)"
|
|
, name, header.version, BSPVERSION);
|
|
|
|
cmod_base = (byte *)buf;
|
|
|
|
// load into heap
|
|
CMod_LoadSurfaces (&header.lumps[LUMP_TEXINFO]);
|
|
CMod_LoadLeafs (&header.lumps[LUMP_LEAFS]);
|
|
CMod_LoadLeafBrushes (&header.lumps[LUMP_LEAFBRUSHES]);
|
|
CMod_LoadPlanes (&header.lumps[LUMP_PLANES]);
|
|
CMod_LoadBrushes (&header.lumps[LUMP_BRUSHES]);
|
|
CMod_LoadBrushSides (&header.lumps[LUMP_BRUSHSIDES]);
|
|
CMod_LoadSubmodels (&header.lumps[LUMP_MODELS]);
|
|
CMod_LoadNodes (&header.lumps[LUMP_NODES]);
|
|
CMod_LoadAreas (&header.lumps[LUMP_AREAS]);
|
|
CMod_LoadAreaPortals (&header.lumps[LUMP_AREAPORTALS]);
|
|
CMod_LoadVisibility (&header.lumps[LUMP_VISIBILITY]);
|
|
CMod_LoadEntityString (&header.lumps[LUMP_ENTITIES]);
|
|
|
|
FS_FreeFile (buf);
|
|
|
|
CM_InitBoxHull ();
|
|
|
|
memset (portalopen, 0, sizeof(portalopen));
|
|
FloodAreaConnections ();
|
|
|
|
strcpy (map_name, name);
|
|
|
|
return &map_cmodels[0];
|
|
}
|
|
|
|
/*
|
|
==================
|
|
CM_InlineModel
|
|
==================
|
|
*/
|
|
cmodel_t *CM_InlineModel (char *name)
|
|
{
|
|
int num;
|
|
|
|
if (!name || name[0] != '*')
|
|
Com_Error (ERR_DROP, "CM_InlineModel: bad name");
|
|
num = atoi (name+1);
|
|
if (num < 1 || num >= numcmodels)
|
|
Com_Error (ERR_DROP, "CM_InlineModel: bad number");
|
|
|
|
return &map_cmodels[num];
|
|
}
|
|
|
|
int CM_NumClusters (void)
|
|
{
|
|
return numclusters;
|
|
}
|
|
|
|
int CM_NumInlineModels (void)
|
|
{
|
|
return numcmodels;
|
|
}
|
|
|
|
char *CM_EntityString (void)
|
|
{
|
|
return map_entitystring;
|
|
}
|
|
|
|
int CM_LeafContents (int leafnum)
|
|
{
|
|
if (leafnum < 0 || leafnum >= numleafs)
|
|
Com_Error (ERR_DROP, "CM_LeafContents: bad number");
|
|
return map_leafs[leafnum].contents;
|
|
}
|
|
|
|
int CM_LeafCluster (int leafnum)
|
|
{
|
|
if (leafnum < 0 || leafnum >= numleafs)
|
|
Com_Error (ERR_DROP, "CM_LeafCluster: bad number");
|
|
return map_leafs[leafnum].cluster;
|
|
}
|
|
|
|
int CM_LeafArea (int leafnum)
|
|
{
|
|
if (leafnum < 0 || leafnum >= numleafs)
|
|
Com_Error (ERR_DROP, "CM_LeafArea: bad number");
|
|
return map_leafs[leafnum].area;
|
|
}
|
|
|
|
//=======================================================================
|
|
|
|
|
|
cplane_t *box_planes;
|
|
int box_headnode;
|
|
cbrush_t *box_brush;
|
|
cleaf_t *box_leaf;
|
|
|
|
/*
|
|
===================
|
|
CM_InitBoxHull
|
|
|
|
Set up the planes and nodes so that the six floats of a bounding box
|
|
can just be stored out and get a proper clipping hull structure.
|
|
===================
|
|
*/
|
|
void CM_InitBoxHull (void)
|
|
{
|
|
int i;
|
|
int side;
|
|
cnode_t *c;
|
|
cplane_t *p;
|
|
cbrushside_t *s;
|
|
|
|
box_headnode = numnodes;
|
|
box_planes = &map_planes[numplanes];
|
|
if (numnodes+6 > MAX_MAP_NODES
|
|
|| numbrushes+1 > MAX_MAP_BRUSHES
|
|
|| numleafbrushes+1 > MAX_MAP_LEAFBRUSHES
|
|
|| numbrushsides+6 > MAX_MAP_BRUSHSIDES
|
|
|| numplanes+12 > MAX_MAP_PLANES)
|
|
Com_Error (ERR_DROP, "Not enough room for box tree");
|
|
|
|
box_brush = &map_brushes[numbrushes];
|
|
box_brush->numsides = 6;
|
|
box_brush->firstbrushside = numbrushsides;
|
|
box_brush->contents = CONTENTS_MONSTER;
|
|
|
|
box_leaf = &map_leafs[numleafs];
|
|
box_leaf->contents = CONTENTS_MONSTER;
|
|
box_leaf->firstleafbrush = numleafbrushes;
|
|
box_leaf->numleafbrushes = 1;
|
|
|
|
map_leafbrushes[numleafbrushes] = numbrushes;
|
|
|
|
for (i=0 ; i<6 ; i++)
|
|
{
|
|
side = i&1;
|
|
|
|
// brush sides
|
|
s = &map_brushsides[numbrushsides+i];
|
|
s->plane = map_planes + (numplanes+i*2+side);
|
|
s->surface = &nullsurface;
|
|
|
|
// nodes
|
|
c = &map_nodes[box_headnode+i];
|
|
c->plane = map_planes + (numplanes+i*2);
|
|
c->children[side] = -1 - emptyleaf;
|
|
if (i != 5)
|
|
c->children[side^1] = box_headnode+i + 1;
|
|
else
|
|
c->children[side^1] = -1 - numleafs;
|
|
|
|
// planes
|
|
p = &box_planes[i*2];
|
|
p->type = i>>1;
|
|
p->signbits = 0;
|
|
VectorClear (p->normal);
|
|
p->normal[i>>1] = 1;
|
|
|
|
p = &box_planes[i*2+1];
|
|
p->type = 3 + (i>>1);
|
|
p->signbits = 0;
|
|
VectorClear (p->normal);
|
|
p->normal[i>>1] = -1;
|
|
}
|
|
}
|
|
|
|
|
|
/*
|
|
===================
|
|
CM_HeadnodeForBox
|
|
|
|
To keep everything totally uniform, bounding boxes are turned into small
|
|
BSP trees instead of being compared directly.
|
|
===================
|
|
*/
|
|
int CM_HeadnodeForBox (vec3_t mins, vec3_t maxs)
|
|
{
|
|
box_planes[0].dist = maxs[0];
|
|
box_planes[1].dist = -maxs[0];
|
|
box_planes[2].dist = mins[0];
|
|
box_planes[3].dist = -mins[0];
|
|
box_planes[4].dist = maxs[1];
|
|
box_planes[5].dist = -maxs[1];
|
|
box_planes[6].dist = mins[1];
|
|
box_planes[7].dist = -mins[1];
|
|
box_planes[8].dist = maxs[2];
|
|
box_planes[9].dist = -maxs[2];
|
|
box_planes[10].dist = mins[2];
|
|
box_planes[11].dist = -mins[2];
|
|
|
|
return box_headnode;
|
|
}
|
|
|
|
|
|
/*
|
|
==================
|
|
CM_PointLeafnum_r
|
|
|
|
==================
|
|
*/
|
|
int CM_PointLeafnum_r (vec3_t p, int num)
|
|
{
|
|
float d;
|
|
cnode_t *node;
|
|
cplane_t *plane;
|
|
|
|
while (num >= 0)
|
|
{
|
|
node = map_nodes + num;
|
|
plane = node->plane;
|
|
|
|
if (plane->type < 3)
|
|
d = p[plane->type] - plane->dist;
|
|
else
|
|
d = DotProduct (plane->normal, p) - plane->dist;
|
|
if (d < 0)
|
|
num = node->children[1];
|
|
else
|
|
num = node->children[0];
|
|
}
|
|
|
|
c_pointcontents++; // optimize counter
|
|
|
|
return -1 - num;
|
|
}
|
|
|
|
int CM_PointLeafnum (vec3_t p)
|
|
{
|
|
if (!numplanes)
|
|
return 0; // sound may call this without map loaded
|
|
return CM_PointLeafnum_r (p, 0);
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
=============
|
|
CM_BoxLeafnums
|
|
|
|
Fills in a list of all the leafs touched
|
|
=============
|
|
*/
|
|
int leaf_count, leaf_maxcount;
|
|
int *leaf_list;
|
|
float *leaf_mins, *leaf_maxs;
|
|
int leaf_topnode;
|
|
|
|
void CM_BoxLeafnums_r (int nodenum)
|
|
{
|
|
cplane_t *plane;
|
|
cnode_t *node;
|
|
int s;
|
|
|
|
while (1)
|
|
{
|
|
if (nodenum < 0)
|
|
{
|
|
if (leaf_count >= leaf_maxcount)
|
|
{
|
|
// Com_Printf ("CM_BoxLeafnums_r: overflow\n");
|
|
return;
|
|
}
|
|
leaf_list[leaf_count++] = -1 - nodenum;
|
|
return;
|
|
}
|
|
|
|
node = &map_nodes[nodenum];
|
|
plane = node->plane;
|
|
// s = BoxOnPlaneSide (leaf_mins, leaf_maxs, plane);
|
|
s = BOX_ON_PLANE_SIDE(leaf_mins, leaf_maxs, plane);
|
|
if (s == 1)
|
|
nodenum = node->children[0];
|
|
else if (s == 2)
|
|
nodenum = node->children[1];
|
|
else
|
|
{ // go down both
|
|
if (leaf_topnode == -1)
|
|
leaf_topnode = nodenum;
|
|
CM_BoxLeafnums_r (node->children[0]);
|
|
nodenum = node->children[1];
|
|
}
|
|
|
|
}
|
|
}
|
|
|
|
int CM_BoxLeafnums_headnode (vec3_t mins, vec3_t maxs, int *list, int listsize, int headnode, int *topnode)
|
|
{
|
|
leaf_list = list;
|
|
leaf_count = 0;
|
|
leaf_maxcount = listsize;
|
|
leaf_mins = mins;
|
|
leaf_maxs = maxs;
|
|
|
|
leaf_topnode = -1;
|
|
|
|
CM_BoxLeafnums_r (headnode);
|
|
|
|
if (topnode)
|
|
*topnode = leaf_topnode;
|
|
|
|
return leaf_count;
|
|
}
|
|
|
|
int CM_BoxLeafnums (vec3_t mins, vec3_t maxs, int *list, int listsize, int *topnode)
|
|
{
|
|
return CM_BoxLeafnums_headnode (mins, maxs, list,
|
|
listsize, map_cmodels[0].headnode, topnode);
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
==================
|
|
CM_PointContents
|
|
|
|
==================
|
|
*/
|
|
int CM_PointContents (vec3_t p, int headnode)
|
|
{
|
|
int l;
|
|
|
|
if (!numnodes) // map not loaded
|
|
return 0;
|
|
|
|
l = CM_PointLeafnum_r (p, headnode);
|
|
|
|
return map_leafs[l].contents;
|
|
}
|
|
|
|
/*
|
|
==================
|
|
CM_TransformedPointContents
|
|
|
|
Handles offseting and rotation of the end points for moving and
|
|
rotating entities
|
|
==================
|
|
*/
|
|
int CM_TransformedPointContents (vec3_t p, int headnode, vec3_t origin, vec3_t angles)
|
|
{
|
|
vec3_t p_l;
|
|
vec3_t temp;
|
|
vec3_t forward, right, up;
|
|
int l;
|
|
|
|
// subtract origin offset
|
|
VectorSubtract (p, origin, p_l);
|
|
|
|
// rotate start and end into the models frame of reference
|
|
if (headnode != box_headnode &&
|
|
(angles[0] || angles[1] || angles[2]) )
|
|
{
|
|
AngleVectors (angles, forward, right, up);
|
|
|
|
VectorCopy (p_l, temp);
|
|
p_l[0] = DotProduct (temp, forward);
|
|
p_l[1] = -DotProduct (temp, right);
|
|
p_l[2] = DotProduct (temp, up);
|
|
}
|
|
|
|
l = CM_PointLeafnum_r (p_l, headnode);
|
|
|
|
return map_leafs[l].contents;
|
|
}
|
|
|
|
|
|
/*
|
|
===============================================================================
|
|
|
|
BOX TRACING
|
|
|
|
===============================================================================
|
|
*/
|
|
|
|
// 1/32 epsilon to keep floating point happy
|
|
#define DIST_EPSILON (0.03125)
|
|
|
|
vec3_t trace_start, trace_end;
|
|
vec3_t trace_mins, trace_maxs;
|
|
vec3_t trace_extents;
|
|
|
|
trace_t trace_trace;
|
|
int trace_contents;
|
|
qboolean trace_ispoint; // optimized case
|
|
|
|
/*
|
|
================
|
|
CM_ClipBoxToBrush
|
|
================
|
|
*/
|
|
void CM_ClipBoxToBrush (vec3_t mins, vec3_t maxs, vec3_t p1, vec3_t p2,
|
|
trace_t *trace, cbrush_t *brush)
|
|
{
|
|
int i, j;
|
|
cplane_t *plane, *clipplane;
|
|
float dist;
|
|
float enterfrac, leavefrac;
|
|
vec3_t ofs;
|
|
float d1, d2;
|
|
qboolean getout, startout;
|
|
float f;
|
|
cbrushside_t *side, *leadside;
|
|
|
|
enterfrac = -1;
|
|
leavefrac = 1;
|
|
clipplane = NULL;
|
|
|
|
if (!brush->numsides)
|
|
return;
|
|
|
|
c_brush_traces++;
|
|
|
|
getout = false;
|
|
startout = false;
|
|
leadside = NULL;
|
|
|
|
for (i=0 ; i<brush->numsides ; i++)
|
|
{
|
|
side = &map_brushsides[brush->firstbrushside+i];
|
|
plane = side->plane;
|
|
|
|
// FIXME: special case for axial
|
|
|
|
if (!trace_ispoint)
|
|
{ // general box case
|
|
|
|
// push the plane out apropriately for mins/maxs
|
|
|
|
// FIXME: use signbits into 8 way lookup for each mins/maxs
|
|
for (j=0 ; j<3 ; j++)
|
|
{
|
|
if (plane->normal[j] < 0)
|
|
ofs[j] = maxs[j];
|
|
else
|
|
ofs[j] = mins[j];
|
|
}
|
|
dist = DotProduct (ofs, plane->normal);
|
|
dist = plane->dist - dist;
|
|
}
|
|
else
|
|
{ // special point case
|
|
dist = plane->dist;
|
|
}
|
|
|
|
d1 = DotProduct (p1, plane->normal) - dist;
|
|
d2 = DotProduct (p2, plane->normal) - dist;
|
|
|
|
if (d2 > 0)
|
|
getout = true; // endpoint is not in solid
|
|
if (d1 > 0)
|
|
startout = true;
|
|
|
|
// if completely in front of face, no intersection
|
|
if (d1 > 0 && d2 >= d1)
|
|
return;
|
|
|
|
if (d1 <= 0 && d2 <= 0)
|
|
continue;
|
|
|
|
// crosses face
|
|
if (d1 > d2)
|
|
{ // enter
|
|
f = (d1-DIST_EPSILON) / (d1-d2);
|
|
if (f > enterfrac)
|
|
{
|
|
enterfrac = f;
|
|
clipplane = plane;
|
|
leadside = side;
|
|
}
|
|
}
|
|
else
|
|
{ // leave
|
|
f = (d1+DIST_EPSILON) / (d1-d2);
|
|
if (f < leavefrac)
|
|
leavefrac = f;
|
|
}
|
|
}
|
|
|
|
if (!startout)
|
|
{ // original point was inside brush
|
|
trace->startsolid = true;
|
|
if (!getout)
|
|
trace->allsolid = true;
|
|
return;
|
|
}
|
|
if (enterfrac < leavefrac)
|
|
{
|
|
if (enterfrac > -1 && enterfrac < trace->fraction)
|
|
{
|
|
if (enterfrac < 0)
|
|
enterfrac = 0;
|
|
trace->fraction = enterfrac;
|
|
trace->plane = *clipplane;
|
|
trace->surface = &(leadside->surface->c);
|
|
trace->contents = brush->contents;
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
================
|
|
CM_TestBoxInBrush
|
|
================
|
|
*/
|
|
void CM_TestBoxInBrush (vec3_t mins, vec3_t maxs, vec3_t p1,
|
|
trace_t *trace, cbrush_t *brush)
|
|
{
|
|
int i, j;
|
|
cplane_t *plane;
|
|
float dist;
|
|
vec3_t ofs;
|
|
float d1;
|
|
cbrushside_t *side;
|
|
|
|
if (!brush->numsides)
|
|
return;
|
|
|
|
for (i=0 ; i<brush->numsides ; i++)
|
|
{
|
|
side = &map_brushsides[brush->firstbrushside+i];
|
|
plane = side->plane;
|
|
|
|
// FIXME: special case for axial
|
|
|
|
// general box case
|
|
|
|
// push the plane out apropriately for mins/maxs
|
|
|
|
// FIXME: use signbits into 8 way lookup for each mins/maxs
|
|
for (j=0 ; j<3 ; j++)
|
|
{
|
|
if (plane->normal[j] < 0)
|
|
ofs[j] = maxs[j];
|
|
else
|
|
ofs[j] = mins[j];
|
|
}
|
|
dist = DotProduct (ofs, plane->normal);
|
|
dist = plane->dist - dist;
|
|
|
|
d1 = DotProduct (p1, plane->normal) - dist;
|
|
|
|
// if completely in front of face, no intersection
|
|
if (d1 > 0)
|
|
return;
|
|
|
|
}
|
|
|
|
// inside this brush
|
|
trace->startsolid = trace->allsolid = true;
|
|
trace->fraction = 0;
|
|
trace->contents = brush->contents;
|
|
}
|
|
|
|
|
|
/*
|
|
================
|
|
CM_TraceToLeaf
|
|
================
|
|
*/
|
|
void CM_TraceToLeaf (int leafnum)
|
|
{
|
|
int k;
|
|
int brushnum;
|
|
cleaf_t *leaf;
|
|
cbrush_t *b;
|
|
|
|
leaf = &map_leafs[leafnum];
|
|
if ( !(leaf->contents & trace_contents))
|
|
return;
|
|
// trace line against all brushes in the leaf
|
|
for (k=0 ; k<leaf->numleafbrushes ; k++)
|
|
{
|
|
brushnum = map_leafbrushes[leaf->firstleafbrush+k];
|
|
b = &map_brushes[brushnum];
|
|
if (b->checkcount == checkcount)
|
|
continue; // already checked this brush in another leaf
|
|
b->checkcount = checkcount;
|
|
|
|
if ( !(b->contents & trace_contents))
|
|
continue;
|
|
CM_ClipBoxToBrush (trace_mins, trace_maxs, trace_start, trace_end, &trace_trace, b);
|
|
if (!trace_trace.fraction)
|
|
return;
|
|
}
|
|
|
|
}
|
|
|
|
|
|
/*
|
|
================
|
|
CM_TestInLeaf
|
|
================
|
|
*/
|
|
void CM_TestInLeaf (int leafnum)
|
|
{
|
|
int k;
|
|
int brushnum;
|
|
cleaf_t *leaf;
|
|
cbrush_t *b;
|
|
|
|
leaf = &map_leafs[leafnum];
|
|
if ( !(leaf->contents & trace_contents))
|
|
return;
|
|
// trace line against all brushes in the leaf
|
|
for (k=0 ; k<leaf->numleafbrushes ; k++)
|
|
{
|
|
brushnum = map_leafbrushes[leaf->firstleafbrush+k];
|
|
b = &map_brushes[brushnum];
|
|
if (b->checkcount == checkcount)
|
|
continue; // already checked this brush in another leaf
|
|
b->checkcount = checkcount;
|
|
|
|
if ( !(b->contents & trace_contents))
|
|
continue;
|
|
CM_TestBoxInBrush (trace_mins, trace_maxs, trace_start, &trace_trace, b);
|
|
if (!trace_trace.fraction)
|
|
return;
|
|
}
|
|
|
|
}
|
|
|
|
|
|
/*
|
|
==================
|
|
CM_RecursiveHullCheck
|
|
|
|
==================
|
|
*/
|
|
void CM_RecursiveHullCheck (int num, float p1f, float p2f, vec3_t p1, vec3_t p2)
|
|
{
|
|
cnode_t *node;
|
|
cplane_t *plane;
|
|
float t1, t2, offset;
|
|
float frac, frac2;
|
|
float idist;
|
|
int i;
|
|
vec3_t mid;
|
|
int side;
|
|
float midf;
|
|
|
|
if (trace_trace.fraction <= p1f)
|
|
return; // already hit something nearer
|
|
|
|
// if < 0, we are in a leaf node
|
|
if (num < 0)
|
|
{
|
|
CM_TraceToLeaf (-1-num);
|
|
return;
|
|
}
|
|
|
|
//
|
|
// find the point distances to the seperating plane
|
|
// and the offset for the size of the box
|
|
//
|
|
node = map_nodes + num;
|
|
plane = node->plane;
|
|
|
|
if (plane->type < 3)
|
|
{
|
|
t1 = p1[plane->type] - plane->dist;
|
|
t2 = p2[plane->type] - plane->dist;
|
|
offset = trace_extents[plane->type];
|
|
}
|
|
else
|
|
{
|
|
t1 = DotProduct (plane->normal, p1) - plane->dist;
|
|
t2 = DotProduct (plane->normal, p2) - plane->dist;
|
|
if (trace_ispoint)
|
|
offset = 0;
|
|
else
|
|
offset = fabs(trace_extents[0]*plane->normal[0]) +
|
|
fabs(trace_extents[1]*plane->normal[1]) +
|
|
fabs(trace_extents[2]*plane->normal[2]);
|
|
}
|
|
|
|
|
|
#if 0
|
|
CM_RecursiveHullCheck (node->children[0], p1f, p2f, p1, p2);
|
|
CM_RecursiveHullCheck (node->children[1], p1f, p2f, p1, p2);
|
|
return;
|
|
#endif
|
|
|
|
// see which sides we need to consider
|
|
if (t1 >= offset && t2 >= offset)
|
|
{
|
|
CM_RecursiveHullCheck (node->children[0], p1f, p2f, p1, p2);
|
|
return;
|
|
}
|
|
if (t1 < -offset && t2 < -offset)
|
|
{
|
|
CM_RecursiveHullCheck (node->children[1], p1f, p2f, p1, p2);
|
|
return;
|
|
}
|
|
|
|
// put the crosspoint DIST_EPSILON pixels on the near side
|
|
if (t1 < t2)
|
|
{
|
|
idist = 1.0/(t1-t2);
|
|
side = 1;
|
|
frac2 = (t1 + offset + DIST_EPSILON)*idist;
|
|
frac = (t1 - offset + DIST_EPSILON)*idist;
|
|
}
|
|
else if (t1 > t2)
|
|
{
|
|
idist = 1.0/(t1-t2);
|
|
side = 0;
|
|
frac2 = (t1 - offset - DIST_EPSILON)*idist;
|
|
frac = (t1 + offset + DIST_EPSILON)*idist;
|
|
}
|
|
else
|
|
{
|
|
side = 0;
|
|
frac = 1;
|
|
frac2 = 0;
|
|
}
|
|
|
|
// move up to the node
|
|
if (frac < 0)
|
|
frac = 0;
|
|
if (frac > 1)
|
|
frac = 1;
|
|
|
|
midf = p1f + (p2f - p1f)*frac;
|
|
for (i=0 ; i<3 ; i++)
|
|
mid[i] = p1[i] + frac*(p2[i] - p1[i]);
|
|
|
|
CM_RecursiveHullCheck (node->children[side], p1f, midf, p1, mid);
|
|
|
|
|
|
// go past the node
|
|
if (frac2 < 0)
|
|
frac2 = 0;
|
|
if (frac2 > 1)
|
|
frac2 = 1;
|
|
|
|
midf = p1f + (p2f - p1f)*frac2;
|
|
for (i=0 ; i<3 ; i++)
|
|
mid[i] = p1[i] + frac2*(p2[i] - p1[i]);
|
|
|
|
CM_RecursiveHullCheck (node->children[side^1], midf, p2f, mid, p2);
|
|
}
|
|
|
|
|
|
|
|
//======================================================================
|
|
|
|
/*
|
|
==================
|
|
CM_BoxTrace
|
|
==================
|
|
*/
|
|
trace_t CM_BoxTrace (vec3_t start, vec3_t end,
|
|
vec3_t mins, vec3_t maxs,
|
|
int headnode, int brushmask)
|
|
{
|
|
int i;
|
|
|
|
checkcount++; // for multi-check avoidance
|
|
|
|
c_traces++; // for statistics, may be zeroed
|
|
|
|
// fill in a default trace
|
|
memset (&trace_trace, 0, sizeof(trace_trace));
|
|
trace_trace.fraction = 1;
|
|
trace_trace.surface = &(nullsurface.c);
|
|
|
|
if (!numnodes) // map not loaded
|
|
return trace_trace;
|
|
|
|
trace_contents = brushmask;
|
|
VectorCopy (start, trace_start);
|
|
VectorCopy (end, trace_end);
|
|
VectorCopy (mins, trace_mins);
|
|
VectorCopy (maxs, trace_maxs);
|
|
|
|
//
|
|
// check for position test special case
|
|
//
|
|
if (start[0] == end[0] && start[1] == end[1] && start[2] == end[2])
|
|
{
|
|
int leafs[1024];
|
|
int i, numleafs;
|
|
vec3_t c1, c2;
|
|
int topnode;
|
|
|
|
VectorAdd (start, mins, c1);
|
|
VectorAdd (start, maxs, c2);
|
|
for (i=0 ; i<3 ; i++)
|
|
{
|
|
c1[i] -= 1;
|
|
c2[i] += 1;
|
|
}
|
|
|
|
numleafs = CM_BoxLeafnums_headnode (c1, c2, leafs, 1024, headnode, &topnode);
|
|
for (i=0 ; i<numleafs ; i++)
|
|
{
|
|
CM_TestInLeaf (leafs[i]);
|
|
if (trace_trace.allsolid)
|
|
break;
|
|
}
|
|
VectorCopy (start, trace_trace.endpos);
|
|
return trace_trace;
|
|
}
|
|
|
|
//
|
|
// check for point special case
|
|
//
|
|
if (mins[0] == 0 && mins[1] == 0 && mins[2] == 0
|
|
&& maxs[0] == 0 && maxs[1] == 0 && maxs[2] == 0)
|
|
{
|
|
trace_ispoint = true;
|
|
VectorClear (trace_extents);
|
|
}
|
|
else
|
|
{
|
|
trace_ispoint = false;
|
|
trace_extents[0] = -mins[0] > maxs[0] ? -mins[0] : maxs[0];
|
|
trace_extents[1] = -mins[1] > maxs[1] ? -mins[1] : maxs[1];
|
|
trace_extents[2] = -mins[2] > maxs[2] ? -mins[2] : maxs[2];
|
|
}
|
|
|
|
//
|
|
// general sweeping through world
|
|
//
|
|
CM_RecursiveHullCheck (headnode, 0, 1, start, end);
|
|
|
|
if (trace_trace.fraction == 1)
|
|
{
|
|
VectorCopy (end, trace_trace.endpos);
|
|
}
|
|
else
|
|
{
|
|
for (i=0 ; i<3 ; i++)
|
|
trace_trace.endpos[i] = start[i] + trace_trace.fraction * (end[i] - start[i]);
|
|
}
|
|
return trace_trace;
|
|
}
|
|
|
|
|
|
/*
|
|
==================
|
|
CM_TransformedBoxTrace
|
|
|
|
Handles offseting and rotation of the end points for moving and
|
|
rotating entities
|
|
==================
|
|
*/
|
|
#ifdef _WIN32
|
|
#pragma optimize( "", off )
|
|
#endif
|
|
|
|
|
|
trace_t CM_TransformedBoxTrace (vec3_t start, vec3_t end,
|
|
vec3_t mins, vec3_t maxs,
|
|
int headnode, int brushmask,
|
|
vec3_t origin, vec3_t angles)
|
|
{
|
|
trace_t trace;
|
|
vec3_t start_l, end_l;
|
|
vec3_t a;
|
|
vec3_t forward, right, up;
|
|
vec3_t temp;
|
|
qboolean rotated;
|
|
|
|
// subtract origin offset
|
|
VectorSubtract (start, origin, start_l);
|
|
VectorSubtract (end, origin, end_l);
|
|
|
|
// rotate start and end into the models frame of reference
|
|
if (headnode != box_headnode &&
|
|
(angles[0] || angles[1] || angles[2]) )
|
|
rotated = true;
|
|
else
|
|
rotated = false;
|
|
|
|
if (rotated)
|
|
{
|
|
AngleVectors (angles, forward, right, up);
|
|
|
|
VectorCopy (start_l, temp);
|
|
start_l[0] = DotProduct (temp, forward);
|
|
start_l[1] = -DotProduct (temp, right);
|
|
start_l[2] = DotProduct (temp, up);
|
|
|
|
VectorCopy (end_l, temp);
|
|
end_l[0] = DotProduct (temp, forward);
|
|
end_l[1] = -DotProduct (temp, right);
|
|
end_l[2] = DotProduct (temp, up);
|
|
}
|
|
|
|
// sweep the box through the model
|
|
trace = CM_BoxTrace (start_l, end_l, mins, maxs, headnode, brushmask);
|
|
|
|
if (rotated && trace.fraction != 1.0)
|
|
{
|
|
// FIXME: figure out how to do this with existing angles
|
|
VectorNegate (angles, a);
|
|
AngleVectors (a, forward, right, up);
|
|
|
|
VectorCopy (trace.plane.normal, temp);
|
|
trace.plane.normal[0] = DotProduct (temp, forward);
|
|
trace.plane.normal[1] = -DotProduct (temp, right);
|
|
trace.plane.normal[2] = DotProduct (temp, up);
|
|
}
|
|
|
|
trace.endpos[0] = start[0] + trace.fraction * (end[0] - start[0]);
|
|
trace.endpos[1] = start[1] + trace.fraction * (end[1] - start[1]);
|
|
trace.endpos[2] = start[2] + trace.fraction * (end[2] - start[2]);
|
|
|
|
return trace;
|
|
}
|
|
|
|
#ifdef _WIN32
|
|
#pragma optimize( "", on )
|
|
#endif
|
|
|
|
|
|
|
|
/*
|
|
===============================================================================
|
|
|
|
PVS / PHS
|
|
|
|
===============================================================================
|
|
*/
|
|
|
|
/*
|
|
===================
|
|
CM_DecompressVis
|
|
===================
|
|
*/
|
|
void CM_DecompressVis (byte *in, byte *out)
|
|
{
|
|
int c;
|
|
byte *out_p;
|
|
int row;
|
|
|
|
row = (numclusters+7)>>3;
|
|
out_p = out;
|
|
|
|
if (!in || !numvisibility)
|
|
{ // no vis info, so make all visible
|
|
while (row)
|
|
{
|
|
*out_p++ = 0xff;
|
|
row--;
|
|
}
|
|
return;
|
|
}
|
|
|
|
do
|
|
{
|
|
if (*in)
|
|
{
|
|
*out_p++ = *in++;
|
|
continue;
|
|
}
|
|
|
|
c = in[1];
|
|
in += 2;
|
|
if ((out_p - out) + c > row)
|
|
{
|
|
c = row - (out_p - out);
|
|
Com_DPrintf ("warning: Vis decompression overrun\n");
|
|
}
|
|
while (c)
|
|
{
|
|
*out_p++ = 0;
|
|
c--;
|
|
}
|
|
} while (out_p - out < row);
|
|
}
|
|
|
|
byte pvsrow[MAX_MAP_LEAFS/8];
|
|
byte phsrow[MAX_MAP_LEAFS/8];
|
|
|
|
byte *CM_ClusterPVS (int cluster)
|
|
{
|
|
if (cluster == -1)
|
|
memset (pvsrow, 0, (numclusters+7)>>3);
|
|
else
|
|
CM_DecompressVis (map_visibility + map_vis->bitofs[cluster][DVIS_PVS], pvsrow);
|
|
return pvsrow;
|
|
}
|
|
|
|
byte *CM_ClusterPHS (int cluster)
|
|
{
|
|
if (cluster == -1)
|
|
memset (phsrow, 0, (numclusters+7)>>3);
|
|
else
|
|
CM_DecompressVis (map_visibility + map_vis->bitofs[cluster][DVIS_PHS], phsrow);
|
|
return phsrow;
|
|
}
|
|
|
|
|
|
/*
|
|
===============================================================================
|
|
|
|
AREAPORTALS
|
|
|
|
===============================================================================
|
|
*/
|
|
|
|
void FloodArea_r (carea_t *area, int floodnum)
|
|
{
|
|
int i;
|
|
dareaportal_t *p;
|
|
|
|
if (area->floodvalid == floodvalid)
|
|
{
|
|
if (area->floodnum == floodnum)
|
|
return;
|
|
Com_Error (ERR_DROP, "FloodArea_r: reflooded");
|
|
}
|
|
|
|
area->floodnum = floodnum;
|
|
area->floodvalid = floodvalid;
|
|
p = &map_areaportals[area->firstareaportal];
|
|
for (i=0 ; i<area->numareaportals ; i++, p++)
|
|
{
|
|
if (portalopen[p->portalnum])
|
|
FloodArea_r (&map_areas[p->otherarea], floodnum);
|
|
}
|
|
}
|
|
|
|
/*
|
|
====================
|
|
FloodAreaConnections
|
|
|
|
|
|
====================
|
|
*/
|
|
void FloodAreaConnections (void)
|
|
{
|
|
int i;
|
|
carea_t *area;
|
|
int floodnum;
|
|
|
|
// all current floods are now invalid
|
|
floodvalid++;
|
|
floodnum = 0;
|
|
|
|
// area 0 is not used
|
|
for (i=1 ; i<numareas ; i++)
|
|
{
|
|
area = &map_areas[i];
|
|
if (area->floodvalid == floodvalid)
|
|
continue; // already flooded into
|
|
floodnum++;
|
|
FloodArea_r (area, floodnum);
|
|
}
|
|
|
|
}
|
|
|
|
void CM_SetAreaPortalState (int portalnum, qboolean open)
|
|
{
|
|
if (portalnum > numareaportals)
|
|
Com_Error (ERR_DROP, "areaportal > numareaportals");
|
|
|
|
portalopen[portalnum] = open;
|
|
FloodAreaConnections ();
|
|
}
|
|
|
|
qboolean CM_AreasConnected (int area1, int area2)
|
|
{
|
|
if (map_noareas->value)
|
|
return true;
|
|
|
|
if (area1 > numareas || area2 > numareas)
|
|
Com_Error (ERR_DROP, "area > numareas");
|
|
|
|
if (map_areas[area1].floodnum == map_areas[area2].floodnum)
|
|
return true;
|
|
return false;
|
|
}
|
|
|
|
|
|
/*
|
|
=================
|
|
CM_WriteAreaBits
|
|
|
|
Writes a length byte followed by a bit vector of all the areas
|
|
that area in the same flood as the area parameter
|
|
|
|
This is used by the client refreshes to cull visibility
|
|
=================
|
|
*/
|
|
int CM_WriteAreaBits (byte *buffer, int area)
|
|
{
|
|
int i;
|
|
int floodnum;
|
|
int bytes;
|
|
|
|
bytes = (numareas+7)>>3;
|
|
|
|
if (map_noareas->value)
|
|
{ // for debugging, send everything
|
|
memset (buffer, 255, bytes);
|
|
}
|
|
else
|
|
{
|
|
memset (buffer, 0, bytes);
|
|
|
|
floodnum = map_areas[area].floodnum;
|
|
for (i=0 ; i<numareas ; i++)
|
|
{
|
|
if (map_areas[i].floodnum == floodnum || !area)
|
|
buffer[i>>3] |= 1<<(i&7);
|
|
}
|
|
}
|
|
|
|
return bytes;
|
|
}
|
|
|
|
|
|
/*
|
|
===================
|
|
CM_WritePortalState
|
|
|
|
Writes the portal state to a savegame file
|
|
===================
|
|
*/
|
|
void CM_WritePortalState (FILE *f)
|
|
{
|
|
fwrite (portalopen, sizeof(portalopen), 1, f);
|
|
}
|
|
|
|
/*
|
|
===================
|
|
CM_ReadPortalState
|
|
|
|
Reads the portal state from a savegame file
|
|
and recalculates the area connections
|
|
===================
|
|
*/
|
|
void CM_ReadPortalState (FILE *f)
|
|
{
|
|
FS_Read (portalopen, sizeof(portalopen), f);
|
|
FloodAreaConnections ();
|
|
}
|
|
|
|
/*
|
|
=============
|
|
CM_HeadnodeVisible
|
|
|
|
Returns true if any leaf under headnode has a cluster that
|
|
is potentially visible
|
|
=============
|
|
*/
|
|
qboolean CM_HeadnodeVisible (int nodenum, byte *visbits)
|
|
{
|
|
int leafnum;
|
|
int cluster;
|
|
cnode_t *node;
|
|
|
|
if (nodenum < 0)
|
|
{
|
|
leafnum = -1-nodenum;
|
|
cluster = map_leafs[leafnum].cluster;
|
|
if (cluster == -1)
|
|
return false;
|
|
if (visbits[cluster>>3] & (1<<(cluster&7)))
|
|
return true;
|
|
return false;
|
|
}
|
|
|
|
node = &map_nodes[nodenum];
|
|
if (CM_HeadnodeVisible(node->children[0], visbits))
|
|
return true;
|
|
return CM_HeadnodeVisible(node->children[1], visbits);
|
|
}
|
|
|