/*
 * 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

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

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_HullPointContents (hull_t * hull, int num, vec3_t p);
int           SV_PointContents (vec3_t p);
// returns the CONTENTS_* value from the world at the given point.
// does not check any entities at all
// the non-true version remaps the water current contents to content_water

qboolean      SV_RecursiveHullCheck (hull_t * hull, int num, float p1f, float p2f, vec3_t p1, vec3_t p2,
                                     trace_t * trace);
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)
