/***
*
*	Copyright (c) 1996-2002, Valve LLC. All rights reserved.
*	
*	This product contains software technology licensed from Id 
*	Software, Inc. ("Id Technology").  Id Technology (c) 1996 Id Software, Inc. 
*	All Rights Reserved.
*
*   Use, distribution, and modification of this source code and/or resulting
*   object code is restricted to non-commercial enhancements to products from
*   Valve LLC.  All other use, distribution, or modification is prohibited
*   without written permission from Valve LLC.
*
****/
#pragma once
#if !defined(TRAINS_H)
#define TRAINS_H

// Tracktrain spawn flags
#define SF_TRACKTRAIN_NOPITCH		0x0001
#define SF_TRACKTRAIN_NOCONTROL		0x0002
#define SF_TRACKTRAIN_FORWARDONLY	0x0004
#define SF_TRACKTRAIN_PASSABLE		0x0008

// Spawnflag for CPathTrack
#define SF_PATH_DISABLED		0x00000001
#define SF_PATH_FIREONCE		0x00000002
#define SF_PATH_ALTREVERSE		0x00000004
#define SF_PATH_DISABLE_TRAIN		0x00000008
#define SF_PATH_ALTERNATE		0x00008000

// Spawnflags of CPathCorner
#define SF_CORNER_WAITFORTRIG		0x001
#define SF_CORNER_TELEPORT		0x002
#define SF_CORNER_FIREONCE		0x004

//#define PATH_SPARKLE_DEBUG		1	// This makes a particle effect around path_track entities for debugging
class CPathTrack : public CPointEntity
{
public:
	void Spawn( void );
	void Activate( void );
	void KeyValue( KeyValueData* pkvd);

	void SetPrevious( CPathTrack *pprevious );
	void Link( void );
	void Use( CBaseEntity *pActivator, CBaseEntity *pCaller, USE_TYPE useType, float value );

	CPathTrack *ValidPath( CPathTrack *ppath, int testFlag );		// Returns ppath if enabled, NULL otherwise
	void Project( CPathTrack *pstart, CPathTrack *pend, Vector *origin, float dist );

	static CPathTrack *Instance( edict_t *pent );

	CPathTrack *LookAhead( Vector *origin, float dist, int move );
	CPathTrack *Nearest( Vector origin );

	CPathTrack *GetNext( void );
	CPathTrack *GetPrevious( void );

	virtual int Save( CSave &save );
	virtual int Restore( CRestore &restore );

	static TYPEDESCRIPTION m_SaveData[];
#if PATH_SPARKLE_DEBUG
	void EXPORT Sparkle( void );
#endif
	float m_length;
	string_t m_altName;
	CPathTrack *m_pnext;
	CPathTrack *m_pprevious;
	CPathTrack *m_paltpath;
};

class CFuncTrackTrain : public CBaseEntity
{
public:
	void Spawn( void );
	void Precache( void );

	void Blocked( CBaseEntity *pOther );
	void Use( CBaseEntity *pActivator, CBaseEntity *pCaller, USE_TYPE useType, float value );
	void KeyValue( KeyValueData* pkvd );

	void EXPORT Next( void );
	void EXPORT Find( void );
	void EXPORT NearestPath( void );
	void EXPORT DeadEnd( void );

	void NextThink( float thinkTime, BOOL alwaysThink );

	void SetTrack( CPathTrack *track ) { m_ppath = track->Nearest( pev->origin ); }
	void SetControls( entvars_t *pevControls );
	BOOL OnControls( entvars_t *pev );

	void StopSound( void );
	void UpdateSound( void );

	static CFuncTrackTrain *Instance( edict_t *pent );

	virtual int Save( CSave &save );
	virtual int Restore( CRestore &restore );

	static TYPEDESCRIPTION m_SaveData[];
	virtual int ObjectCaps( void ) { return ( CBaseEntity::ObjectCaps() & ~FCAP_ACROSS_TRANSITION ) | FCAP_DIRECTIONAL_USE; }

	virtual void OverrideReset( void );

	CPathTrack *m_ppath;
	float m_length;
	float m_height;
	float m_speed;
	float m_dir;
	float m_startSpeed;
	Vector m_controlMins;
	Vector m_controlMaxs;
	int m_soundPlaying;
	int m_sounds;
	float m_flVolume;
	float m_flBank;
	float m_oldSpeed;

private:
	unsigned short m_usAdjustPitch;
};

class CFuncVehicle: public CBaseEntity
{
public:
	virtual void Spawn();
	virtual void Precache();
	virtual void Restart();
	virtual void KeyValue( KeyValueData *pkvd );
	virtual int Save( CSave &save );
	virtual int Restore( CRestore &restore );
	virtual int ObjectCaps() { return ( CBaseEntity::ObjectCaps() & ~FCAP_ACROSS_TRANSITION ) | FCAP_DIRECTIONAL_USE; }
	virtual int Classify();
	virtual void OverrideReset();
	virtual BOOL OnControls( entvars_t *pev );
	virtual void Use( CBaseEntity *pActivator, CBaseEntity *pCaller, USE_TYPE useType, float value );
	virtual void Blocked( CBaseEntity *pOther );

public:
	void EXPORT Next();
	void EXPORT Find();
	void EXPORT NearestPath();
	void EXPORT DeadEnd();

	void NextThink( float thinkTime, BOOL alwaysThink );
	void CollisionDetection();
	void TerrainFollowing();
	void CheckTurning();

	void SetTrack( CPathTrack *track ) { m_ppath = track->Nearest( pev->origin ); }
	void SetControls( entvars_t *pevControls );

	void StopSound();
	void UpdateSound();

public:
	static CFuncVehicle *Instance( edict_t *pent );
	static TYPEDESCRIPTION m_SaveData[12];

	CPathTrack *m_ppath;
	float m_length;
	float m_width;
	float m_height;
	float m_speed;
	float m_dir;
	float m_startSpeed;
	Vector m_controlMins;
	Vector m_controlMaxs;
	int m_soundPlaying;
	int m_sounds;
	int m_acceleration;
	float m_flVolume;
	float m_flBank;
	float m_oldSpeed;
	int m_iTurnAngle;
	float m_flSteeringWheelDecay;
	float m_flAcceleratorDecay;
	float m_flTurnStartTime;
	float m_flLaunchTime;
	float m_flLastNormalZ;
	float m_flCanTurnNow;
	float m_flUpdateSound;
	Vector m_vFrontLeft;
	Vector m_vFront;
	Vector m_vFrontRight;
	Vector m_vBackLeft;
	Vector m_vBack;
	Vector m_vBackRight;
	Vector m_vSurfaceNormal;
	Vector m_vVehicleDirection;
	CBaseEntity *m_pDriver;

private:
	unsigned short m_usAdjustPitch;
};

class CFuncVehicleControls: public CBaseEntity
{
public:
	virtual void Spawn();
	virtual int ObjectCaps() { return CBaseEntity::ObjectCaps() & ~FCAP_ACROSS_TRANSITION; }

public:
	void EXPORT Find();
};

#endif