class Object native
{
	native bool bDestroyed;

	// These really should be global functions...
	native static int G_SkillPropertyInt(int p);
	native static double G_SkillPropertyFloat(int p);
	native static vector3, int G_PickDeathmatchStart();
	native static vector3, int G_PickPlayerStart(int pnum, int flags = 0);
	native static int GameType();
	native static void S_Sound (Sound sound_id, int channel, float volume = 1, float attenuation = ATTN_NORM);
	native static void C_MidPrint(string fontname, string textlabel, bool bold = false);	// always uses the stringtable.

	/*virtual*/ native void Destroy();
}

class Thinker : Object native
{
	const TICRATE = 35;
	
	virtual native void Tick();
	virtual native void PostBeginPlay();
}

class ThinkerIterator : Object native
{
	enum EStatnums
	{
		MAX_STATNUM = 127
	}

	native static ThinkerIterator Create(class<Object> type = "Actor", int statnum=MAX_STATNUM+1);
	native Thinker Next(bool exact = false);
	native void Reinit();
}

class ActorIterator : Object native
{
	native static ActorIterator Create(int tid, class<Actor> type = "Actor");
	native Actor Next();
	native void Reinit();
}

class DropItem : Object native
{
	native readonly DropItem Next;
	native readonly name Name;
	native readonly int Probability;
	native int Amount;
}

class SpotState : Object native
{
	native static SpotState GetSpotState();
	native SpecialSpot GetNextInList(class<Actor> type, int skipcounter);
	native SpecialSpot GetSpotWithMinMaxDistance(Class<Actor> type, double x, double y, double mindist, double maxdist);
	
}

struct LevelLocals native
{
	native readonly int time;
	native readonly int maptime;
	native readonly int totaltime;
	native readonly int starttime;
	native readonly int partime;
	native readonly int sucktime;
	native readonly int cluster;
	native readonly int clusterflags;
	native readonly int levelnum;
	native readonly String LevelName;
	native readonly String MapName;
	native String NextMap;
	native String NextSecretMap;
	native readonly int maptype;
	native readonly String Music;
	native readonly int musicorder;
	native readonly int total_secrets;
	native int found_secrets;
	native readonly int total_items;
	native int found_items;
	native readonly int total_monsters;
	native int killed_monsters;
	native double gravity;
	native double aircontrol;
	native double airfriction;
	native int airsupply;
	native double teamdamage;
	native bool monsterstelefrag;
	native bool actownspecial;
	native bool sndseqtotalctrl;
	native bool allmap;
	native bool missilesactivateimpact;
	native bool monsterfallingdamage;
	native bool checkswitchrange;
	native bool polygrind;
	native bool nomonsters;
// level_info_t *info cannot be done yet.
}

struct StringTable native
{
	native static String Localize(String val);
}

// a few values of this need to be readable by the play code.
// Most are handled at load time and are omitted here.
struct DehInfo native
{
	native int MaxSoulsphere;
	native uint8 ExplosionStyle;
	native double ExplosionAlpha;
	native int NoAutofreeze;
	native int BFGCells;
}

struct State native
{
	native State NextState;
	native int sprite;
	native int16 Tics;
	native uint16 TicRange;
	native uint8 Frame;		
	native uint8 UseFlags;	
	native int Misc1;
	native int Misc2;
	native uint16 bSlow;
	native uint16 bFast;
	native bool bFullbright;
	native bool bNoDelay;
	native bool bSameFrame;
	native bool bCanRaise;
	native bool bDehacked;
}

struct F3DFloor native
{
}

struct Line native
{
	//native readonly vertex		v1, v2;		// vertices, from v1 to v2
	native readonly Vector2			delta;		// precalculated v2 - v1 for side checking
	native uint						flags;
	native uint						activation;	// activation type
	native int						special;
	native int						args[5];	// <--- hexen-style arguments (expanded to ZDoom's full width)
	native double					alpha;		// <--- translucency (0=invisibile, FRACUNIT=opaque)
	//native Side					sidedef[2];
	native readonly double			bbox[4];	// bounding box, for the extent of the LineDef.
	native readonly Sector			frontsector, backsector;
	native int 						validcount;	// if == validcount, already checked
	native int						locknumber;	// [Dusk] lock number for special
	native readonly uint			portalindex;
}

struct Sector native
{
	//secplane_t	floorplane, ceilingplane;
	//FDynamicColormap *ColorMap;	// [RH] Per-sector colormap

	native Actor 		SoundTarget;

	native int16 		special;
	native int16 		lightlevel;
	native int16		seqType;	

	native int			sky;
	native Name			SeqName;	

	native readonly Vector2		centerspot;	
	native int 			validcount;	
	native Actor		thinglist;	

	native double		friction, movefactor;
	native int			terrainnum[2];

	// thinker_t for reversable actions
	//SectorEffect floordata;	
	//SectorEffect ceilingdata;	
	//SectorEffect lightingdata;

	enum EInterpolationType
	{
		CeilingMove,
		FloorMove,
		CeilingScroll,
		FloorScroll
	};
	//Interpolation interpolations[4];

	native uint8 		soundtraversed;
	native int8 		stairlock;
	native int 			prevsec;
	native int	 		nextsec;

	native readonly int16 		linecount;
	//line_t **lines; // this is defined internally to avoid exposing some overly complicated type to the parser

	native readonly Sector		heightsec;

	native uint			bottommap, midmap, topmap;

	//struct msecnode_t *touching_thinglist;
	//struct msecnode_t *render_thinglist;

	native double 		gravity;	
	native Name 		damagetype;
	native int 			damageamount;
	native int16 		damageinterval;
	native int16 		leakydamage;

	native uint16		ZoneNumber;
	native uint16		MoreFlags;
	
	enum ESectorFlags
	{
		SECF_SILENT			= 1,	// actors in sector make no noise
		SECF_NOFALLINGDAMAGE= 2,	// No falling damage in this sector
		SECF_FLOORDROP		= 4,	// all actors standing on this floor will remain on it when it lowers very fast.
		SECF_NORESPAWN		= 8,	// players can not respawn in this sector
		SECF_FRICTION		= 16,	// sector has friction enabled
		SECF_PUSH			= 32,	// pushers enabled
		SECF_SILENTMOVE		= 64,	// Sector movement makes mo sound (Eternity got this so this may be useful for an extended cross-port standard.) 
		SECF_DMGTERRAINFX	= 128,	// spawns terrain splash when inflicting damage
		SECF_ENDGODMODE		= 256,	// getting damaged by this sector ends god mode
		SECF_ENDLEVEL		= 512,	// ends level when health goes below 10
		SECF_HAZARD			= 1024,	// Change to Strife's delayed damage handling.

		SECF_WASSECRET		= 1 << 30,	// a secret that was discovered
		SECF_SECRET			= 1 << 31,	// a secret sector

		SECF_DAMAGEFLAGS = SECF_ENDGODMODE|SECF_ENDLEVEL|SECF_DMGTERRAINFX|SECF_HAZARD,
		SECF_NOMODIFY = SECF_SECRET|SECF_WASSECRET,	// not modifiable by Sector_ChangeFlags
		SECF_SPECIALFLAGS = SECF_DAMAGEFLAGS|SECF_FRICTION|SECF_PUSH,	// these flags originate from 'special and must be transferrable by floor thinkers
	}
	native uint			Flags;

	native SectorAction		SecActTarget;

	native readonly uint		Portals[2];
	native readonly int			PortalGroup;

	native readonly int			sectornum;


	native double, Sector, F3DFloor NextHighestCeilingAt(double x, double y, double bottomz, double topz, int flags = 0);
}

struct Wads
{
	enum WadNamespace
	{
		ns_hidden = -1,

		ns_global = 0,
		ns_sprites,
		ns_flats,
		ns_colormaps,
		ns_acslibrary,
		ns_newtextures,
		ns_bloodraw,
		ns_bloodsfx,
		ns_bloodmisc,
		ns_strifevoices,
		ns_hires,
		ns_voxels,

		ns_specialzipdirectory,
		ns_sounds,
		ns_patches,
		ns_graphics,
		ns_music,

		ns_firstskin,
	}

	native static int CheckNumForName(string name, int ns, int wadnum = -1, bool exact = false);
}

struct TerrainDef native
{
	native Name TerrainName;
	native int Splash;
	native int DamageAmount;
	native Name DamageMOD;
	native int DamageTimeMask;
	native double FootClip;
	native float StepVolume;
	native int WalkStepTics;
	native int RunStepTics;
	native Sound LeftStepSound;
	native Sound RightStepSound;
	native bool IsLiquid;
	native bool AllowProtection;
	native double Friction;
	native double MoveFactor;
};

enum EPickStart
{
	PPS_FORCERANDOM			= 1,
	PPS_NOBLOCKINGCHECK		= 2,
}

// Although String is a builtin type, this is a convenient way to attach methods to it.
struct String native
{
	native void Replace(String pattern, String replacement);
}

class Floor : Thinker native
{
	// only here so that some constants and functions can be added. Not directly usable yet.
	enum EFloor
	{
		floorLowerToLowest,
		floorLowerToNearest,
		floorLowerToHighest,
		floorLowerByValue,
		floorRaiseByValue,
		floorRaiseToHighest,
		floorRaiseToNearest,
		floorRaiseAndCrush,
		floorRaiseAndCrushDoom,
		floorCrushStop,
		floorLowerInstant,
		floorRaiseInstant,
		floorMoveToValue,
		floorRaiseToLowestCeiling,
		floorRaiseByTexture,

		floorLowerAndChange,
		floorRaiseAndChange,

		floorRaiseToLowest,
		floorRaiseToCeiling,
		floorLowerToLowestCeiling,
		floorLowerByTexture,
		floorLowerToCeiling,

		donutRaise,

		buildStair,
		waitStair,
		resetStair,

		// Not to be used as parameters to EV_DoFloor()
		genFloorChg0,
		genFloorChgT,
		genFloorChg
	};

	native static bool CreateFloor(sector sec, EFloor floortype, line ln, double speed, double height = 0, int crush = -1, int change = 0, bool hexencrush = false, bool hereticlower = false);
	
}