/*
Copyright (C) 1996-2001 Id Software, Inc.
Copyright (C) 2002-2009 John Fitzgibbons and others
Copyright (C) 2010-2014 QuakeSpasm developers

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 spingle__world_h
#define spingle__world_h

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

typedef struct
{
	bool    allsolid;       // if true, plane is not valid
	bool    startsolid;     // if true, the initial point was in a solid area
	bool    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, bool touch_triggers);
// Needs to be called any time an entity changes origin, mins, maxs, or solid
// flags ent->v.modified
// sets ED_Vector(ent, ED_absmin) and ED_Vector(ent, ED_absmax)
// if touchtriggers, calls prog functions for the intersected triggers

int32_t SV_PointContents(vec3_t p);
int32_t SV_TruePointContents(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

edict_t *SV_TestEntityPosition(edict_t *ent);

trace_t SV_Move(vec3_t start, vec3_t mins, vec3_t maxs, vec3_t end, int32_t 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)

bool SV_RecursiveHullCheck(hull_t *hull, int32_t num, float p1f, float p2f, vec3_t p1, vec3_t p2, trace_t *trace);

#endif