world.h

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/*
Copyright (C) 1996-1997 Id Software, Inc.
 
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
 
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 
See the GNU General Public License for more details.
 
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 
*/
// world.h
 
#ifndef WORLD_H
#define WORLD_H
 
#include "qtypes.h"
#include "collision.h"
 
#define MOVE_NORMAL     0
#define MOVE_NOMONSTERS 1
#define MOVE_MISSILE    2
#define MOVE_WORLDONLY  3
#define MOVE_HITMODEL   4
 
#define AREA_GRID 128
#define AREA_GRIDNODES (AREA_GRID * AREA_GRID)
 
typedef struct link_s
{
    llist_t list;
    int entitynumber;
} link_t;
 
typedef struct world_physics_s
{
    // for ODE physics engine
    qbool ode; // if true then ode is activated
    void *ode_world;
    void *ode_space;
    void *ode_contactgroup;
    // number of constraint solver iterations to use (for dWorldQuickStep)
    int ode_iterations;
    // actual step (server frametime / ode_iterations)
    vec_t ode_step;
    // time we need to simulate, for constantstep
    vec_t ode_time;
    // stats
    int ode_numobjects; // total objects cound
    int ode_activeovjects; // active objects count
    // max velocity for a 1-unit radius object at current step to prevent
    // missed collisions
    vec_t ode_movelimit;
}
world_physics_t;
 
struct prvm_prog_s;
 
typedef struct world_s
{
    // convenient fields
    char filename[MAX_QPATH];
    vec3_t mins;
    vec3_t maxs;
    struct prvm_prog_s *prog;
 
    int areagrid_stats_calls;
    int areagrid_stats_nodechecks;
    int areagrid_stats_entitychecks;
 
    link_t areagrid[AREA_GRIDNODES];
    link_t areagrid_outside;
    vec3_t areagrid_bias;
    vec3_t areagrid_scale;
    vec3_t areagrid_mins;
    vec3_t areagrid_maxs;
    vec3_t areagrid_size;
    int areagrid_marknumber;
 
    // if the QC uses a physics engine, the data for it is here
    world_physics_t physics;
}
world_t;
 
struct prvm_edict_s;
 
// cyclic doubly-linked list functions
void World_ClearLink(link_t *l);
void World_RemoveLink(link_t *l);
void World_InsertLinkBefore(link_t *l, link_t *before, int entitynumber);
 
void World_Init(void);
void World_Shutdown(void);
 
void World_SetSize(world_t *world, const char *filename, const vec3_t mins, const vec3_t maxs, struct prvm_prog_s *prog);
void World_UnlinkAll(world_t *world);
 
void World_PrintAreaStats(world_t *world, const char *worldname);
 
void World_UnlinkEdict(struct prvm_edict_s *ent);
 
void World_LinkEdict(world_t *world, struct prvm_edict_s *ent, const vec3_t mins, const vec3_t maxs, qbool link_solid_not);
 
int World_EntitiesInBox(world_t *world, const vec3_t mins, const vec3_t maxs, int maxlist, struct prvm_edict_s **list);
 
void World_Start(world_t *world);
void World_End(world_t *world);
 
// update physics
// this is called by SV_Physics
void World_Physics_Frame(world_t *world, double frametime, double gravity);
 
// change physics properties of entity
struct prvm_edict_s;
struct edict_odefunc_s;
void World_Physics_ApplyCmd(struct prvm_edict_s *ed, struct edict_odefunc_s *f);
 
// remove physics data from entity
// this is called by entity removal
void World_Physics_RemoveFromEntity(world_t *world, struct prvm_edict_s *ed);
void World_Physics_RemoveJointFromEntity(world_t *world, struct prvm_edict_s *ed);
 
#endif