2 Copyright (C) 1996-1997 Id Software, Inc.
4 This program is free software; you can redistribute it and/or
5 modify it under the terms of the GNU General Public License
6 as published by the Free Software Foundation; either version 2
7 of the License, or (at your option) any later version.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
13 See the GNU General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with this program; if not, write to the Free Software
17 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
20 // world.c -- world query functions
26 entities never clip against themselves, or their owner
28 line of sight checks trace->inopen and trace->inwater, but bullets don't
32 cvar_t sv_areagrid_mingridsize = {CVAR_NOTIFY, "sv_areagrid_mingridsize", "64", "minimum areagrid cell size, smaller values work better for lots of small objects, higher values for large objects"};
36 Cvar_RegisterVariable(&sv_areagrid_mingridsize);
40 //============================================================================
42 // World_ClearLink is used for new headnodes
43 void World_ClearLink (link_t *l)
46 l->prev = l->next = l;
49 void World_RemoveLink (link_t *l)
51 l->next->prev = l->prev;
52 l->prev->next = l->next;
55 void World_InsertLinkBefore (link_t *l, link_t *before, int entitynumber)
57 l->entitynumber = entitynumber;
59 l->prev = before->prev;
65 ===============================================================================
69 ===============================================================================
72 void World_PrintAreaStats(world_t *world, const char *worldname)
74 Con_Printf("%s areagrid check stats: %d calls %d nodes (%f per call) %d entities (%f per call)\n", worldname, world->areagrid_stats_calls, world->areagrid_stats_nodechecks, (double) world->areagrid_stats_nodechecks / (double) world->areagrid_stats_calls, world->areagrid_stats_entitychecks, (double) world->areagrid_stats_entitychecks / (double) world->areagrid_stats_calls);
75 world->areagrid_stats_calls = 0;
76 world->areagrid_stats_nodechecks = 0;
77 world->areagrid_stats_entitychecks = 0;
86 void World_Clear(world_t *world)
89 // the areagrid_marknumber is not allowed to be 0
90 if (world->areagrid_marknumber < 1)
91 world->areagrid_marknumber = 1;
92 // choose either the world box size, or a larger box to ensure the grid isn't too fine
93 world->areagrid_size[0] = max(world->areagrid_maxs[0] - world->areagrid_mins[0], AREA_GRID * sv_areagrid_mingridsize.value);
94 world->areagrid_size[1] = max(world->areagrid_maxs[1] - world->areagrid_mins[1], AREA_GRID * sv_areagrid_mingridsize.value);
95 world->areagrid_size[2] = max(world->areagrid_maxs[2] - world->areagrid_mins[2], AREA_GRID * sv_areagrid_mingridsize.value);
96 // figure out the corners of such a box, centered at the center of the world box
97 world->areagrid_mins[0] = (world->areagrid_mins[0] + world->areagrid_maxs[0] - world->areagrid_size[0]) * 0.5f;
98 world->areagrid_mins[1] = (world->areagrid_mins[1] + world->areagrid_maxs[1] - world->areagrid_size[1]) * 0.5f;
99 world->areagrid_mins[2] = (world->areagrid_mins[2] + world->areagrid_maxs[2] - world->areagrid_size[2]) * 0.5f;
100 world->areagrid_maxs[0] = (world->areagrid_mins[0] + world->areagrid_maxs[0] + world->areagrid_size[0]) * 0.5f;
101 world->areagrid_maxs[1] = (world->areagrid_mins[1] + world->areagrid_maxs[1] + world->areagrid_size[1]) * 0.5f;
102 world->areagrid_maxs[2] = (world->areagrid_mins[2] + world->areagrid_maxs[2] + world->areagrid_size[2]) * 0.5f;
103 // now calculate the actual useful info from that
104 VectorNegate(world->areagrid_mins, world->areagrid_bias);
105 world->areagrid_scale[0] = AREA_GRID / world->areagrid_size[0];
106 world->areagrid_scale[1] = AREA_GRID / world->areagrid_size[1];
107 world->areagrid_scale[2] = AREA_GRID / world->areagrid_size[2];
108 World_ClearLink(&world->areagrid_outside);
109 for (i = 0;i < AREA_GRIDNODES;i++)
110 World_ClearLink(&world->areagrid[i]);
111 Con_DPrintf("areagrid settings: divisions %ix%ix1 : box %f %f %f : %f %f %f size %f %f %f grid %f %f %f (mingrid %f)\n", AREA_GRID, AREA_GRID, world->areagrid_mins[0], world->areagrid_mins[1], world->areagrid_mins[2], world->areagrid_maxs[0], world->areagrid_maxs[1], world->areagrid_maxs[2], world->areagrid_size[0], world->areagrid_size[1], world->areagrid_size[2], 1.0f / world->areagrid_scale[0], 1.0f / world->areagrid_scale[1], 1.0f / world->areagrid_scale[2], sv_areagrid_mingridsize.value);
120 void World_UnlinkEdict(prvm_edict_t *ent)
123 for (i = 0;i < ENTITYGRIDAREAS;i++)
125 if (ent->priv.server->areagrid[i].prev)
127 World_RemoveLink (&ent->priv.server->areagrid[i]);
128 ent->priv.server->areagrid[i].prev = ent->priv.server->areagrid[i].next = NULL;
133 int World_EntitiesInBox(world_t *world, vec3_t mins, vec3_t maxs, int maxlist, prvm_edict_t **list)
139 int igrid[3], igridmins[3], igridmaxs[3];
141 // FIXME: if areagrid_marknumber wraps, all entities need their
142 // ent->priv.server->areagridmarknumber reset
143 world->areagrid_stats_calls++;
144 world->areagrid_marknumber++;
145 igridmins[0] = (int) floor((mins[0] + world->areagrid_bias[0]) * world->areagrid_scale[0]);
146 igridmins[1] = (int) floor((mins[1] + world->areagrid_bias[1]) * world->areagrid_scale[1]);
147 //igridmins[2] = (int) ((mins[2] + world->areagrid_bias[2]) * world->areagrid_scale[2]);
148 igridmaxs[0] = (int) floor((maxs[0] + world->areagrid_bias[0]) * world->areagrid_scale[0]) + 1;
149 igridmaxs[1] = (int) floor((maxs[1] + world->areagrid_bias[1]) * world->areagrid_scale[1]) + 1;
150 //igridmaxs[2] = (int) ((maxs[2] + world->areagrid_bias[2]) * world->areagrid_scale[2]) + 1;
151 igridmins[0] = max(0, igridmins[0]);
152 igridmins[1] = max(0, igridmins[1]);
153 //igridmins[2] = max(0, igridmins[2]);
154 igridmaxs[0] = min(AREA_GRID, igridmaxs[0]);
155 igridmaxs[1] = min(AREA_GRID, igridmaxs[1]);
156 //igridmaxs[2] = min(AREA_GRID, igridmaxs[2]);
159 // add entities not linked into areagrid because they are too big or
160 // outside the grid bounds
161 if (world->areagrid_outside.next != &world->areagrid_outside)
163 grid = &world->areagrid_outside;
164 for (l = grid->next;l != grid;l = l->next)
166 ent = PRVM_EDICT_NUM(l->entitynumber);
167 if (ent->priv.server->areagridmarknumber != world->areagrid_marknumber)
169 ent->priv.server->areagridmarknumber = world->areagrid_marknumber;
170 if (!ent->priv.server->free && BoxesOverlap(mins, maxs, ent->priv.server->areamins, ent->priv.server->areamaxs))
172 if (numlist < maxlist)
176 world->areagrid_stats_entitychecks++;
180 // add grid linked entities
181 for (igrid[1] = igridmins[1];igrid[1] < igridmaxs[1];igrid[1]++)
183 grid = world->areagrid + igrid[1] * AREA_GRID + igridmins[0];
184 for (igrid[0] = igridmins[0];igrid[0] < igridmaxs[0];igrid[0]++, grid++)
186 if (grid->next != grid)
188 for (l = grid->next;l != grid;l = l->next)
190 ent = PRVM_EDICT_NUM(l->entitynumber);
191 if (ent->priv.server->areagridmarknumber != world->areagrid_marknumber)
193 ent->priv.server->areagridmarknumber = world->areagrid_marknumber;
194 if (!ent->priv.server->free && BoxesOverlap(mins, maxs, ent->priv.server->areamins, ent->priv.server->areamaxs))
196 if (numlist < maxlist)
200 //Con_Printf("%d %f %f %f %f %f %f : %d : %f %f %f %f %f %f\n", BoxesOverlap(mins, maxs, ent->priv.server->areamins, ent->priv.server->areamaxs), ent->priv.server->areamins[0], ent->priv.server->areamins[1], ent->priv.server->areamins[2], ent->priv.server->areamaxs[0], ent->priv.server->areamaxs[1], ent->priv.server->areamaxs[2], PRVM_NUM_FOR_EDICT(ent), mins[0], mins[1], mins[2], maxs[0], maxs[1], maxs[2]);
202 world->areagrid_stats_entitychecks++;
210 void World_LinkEdict_AreaGrid(world_t *world, prvm_edict_t *ent)
213 int igrid[3], igridmins[3], igridmaxs[3], gridnum, entitynumber = PRVM_NUM_FOR_EDICT(ent);
215 if (entitynumber <= 0 || entitynumber >= prog->max_edicts || PRVM_EDICT_NUM(entitynumber) != ent)
217 Con_Printf ("SV_LinkEdict_AreaGrid: invalid edict %p (edicts is %p, edict compared to prog->edicts is %i)\n", ent, prog->edicts, entitynumber);
221 igridmins[0] = (int) floor((ent->priv.server->areamins[0] + sv.world.areagrid_bias[0]) * sv.world.areagrid_scale[0]);
222 igridmins[1] = (int) floor((ent->priv.server->areamins[1] + sv.world.areagrid_bias[1]) * sv.world.areagrid_scale[1]);
223 //igridmins[2] = (int) floor((ent->priv.server->areamins[2] + sv.world.areagrid_bias[2]) * sv.world.areagrid_scale[2]);
224 igridmaxs[0] = (int) floor((ent->priv.server->areamaxs[0] + sv.world.areagrid_bias[0]) * sv.world.areagrid_scale[0]) + 1;
225 igridmaxs[1] = (int) floor((ent->priv.server->areamaxs[1] + sv.world.areagrid_bias[1]) * sv.world.areagrid_scale[1]) + 1;
226 //igridmaxs[2] = (int) floor((ent->priv.server->areamaxs[2] + sv.world.areagrid_bias[2]) * sv.world.areagrid_scale[2]) + 1;
227 if (igridmins[0] < 0 || igridmaxs[0] > AREA_GRID || igridmins[1] < 0 || igridmaxs[1] > AREA_GRID || ((igridmaxs[0] - igridmins[0]) * (igridmaxs[1] - igridmins[1])) > ENTITYGRIDAREAS)
229 // wow, something outside the grid, store it as such
230 World_InsertLinkBefore (&ent->priv.server->areagrid[0], &sv.world.areagrid_outside, entitynumber);
235 for (igrid[1] = igridmins[1];igrid[1] < igridmaxs[1];igrid[1]++)
237 grid = sv.world.areagrid + igrid[1] * AREA_GRID + igridmins[0];
238 for (igrid[0] = igridmins[0];igrid[0] < igridmaxs[0];igrid[0]++, grid++, gridnum++)
239 World_InsertLinkBefore (&ent->priv.server->areagrid[gridnum], grid, entitynumber);
249 void World_LinkEdict(world_t *world, prvm_edict_t *ent, const vec3_t mins, const vec3_t maxs)
251 // unlink from old position first
252 if (ent->priv.server->areagrid[0].prev)
253 World_UnlinkEdict(ent);
255 // don't add the world
256 if (ent == prog->edicts)
259 // don't add free entities
260 if (ent->priv.server->free)
263 VectorCopy(mins, ent->priv.server->areamins);
264 VectorCopy(maxs, ent->priv.server->areamaxs);
265 World_LinkEdict_AreaGrid(world, ent);