/*
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.

*/

#ifndef SERVER_WORLD_H
#define SERVER_WORLD_H

#include "progs.h"

// world.h

typedef struct {
    vec3_t normal;
    float dist;
} plane_t;

typedef struct {
    qboolean allsolid;		// if true, plane is not valid
    qboolean startsolid;	// if true, the initial point was in a solid area
    qboolean inopen, inwater;
    float fraction;		// time completed, 1.0 = didn't hit anything
    vec3_t endpos;		// final position
    plane_t plane;		// surface normal at impact
    edict_t *ent;		// entity the surface is on
} trace_t;


#define	MOVE_NORMAL		0
#define	MOVE_NOMONSTERS	1
#define	MOVE_MISSILE	2

typedef struct areanode_s {
    int axis;			// -1 = leaf node
    float dist;
    struct areanode_s *children[2];
    link_t trigger_edicts;
    link_t solid_edicts;
} areanode_t;

#define	AREA_DEPTH	4
#define	AREA_NODES	32

extern areanode_t sv_areanodes[AREA_NODES];


void SV_ClearWorld(void);

// called after the world model has been loaded, before linking any entities

void SV_UnlinkEdict(edict_t *ent);

// call before removing an entity, and before trying to move one,
// so it doesn't clip against itself
// flags ent->v.modified

void SV_LinkEdict(edict_t *ent, qboolean touch_triggers);

// Needs to be called any time an entity changes origin, mins, maxs, or solid
// flags ent->v.modified
// sets ent->v.absmin and ent->v.absmax
// if touchtriggers, calls prog functions for the intersected triggers

int SV_PointContents(vec3_t p);

// returns the CONTENTS_* value from the world at the given point.
// does not check any entities at all

edict_t *SV_TestEntityPosition(edict_t *ent);

trace_t SV_Move(vec3_t start, vec3_t mins, vec3_t maxs, vec3_t end,
		int type, edict_t *passedict);
// mins and maxs are reletive

// if the entire move stays in a solid volume, trace.allsolid will be set

// if the starting point is in a solid, it will be allowed to move out
// to an open area

// nomonsters is used for line of sight or edge testing, where mosnters
// shouldn't be considered solid objects

// passedict is explicitly excluded from clipping checks (normally NULL)


edict_t *SV_TestPlayerPosition(edict_t *ent, vec3_t origin);

#endif /* SERVER_WORLD_H */
