colobot/src/physics/physics.h

// * This file is part of the COLOBOT source code
// * Copyright (C) 2001-2008, Daniel ROUX & EPSITEC SA, www.epsitec.ch
// *
// * 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 3 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, see  http://www.gnu.org/licenses/.

// physics.h

#pragma once


#include "graphics/d3d/d3dengine.h"
#include "common/misc.h"
#include "object/object.h"


class CInstanceManager;
class CD3DEngine;
class CLight;
class CParticule;
class CTerrain;
class CWater;
class CCamera;
class CObject;
class CBrain;
class CMotion;
class CSound;


enum PhysicsType
{
	TYPE_ROLLING	= 1,
	TYPE_FLYING		= 2,
};

enum PhysicsMode
{
	MO_ADVACCEL		= 0,
	MO_RECACCEL		= 1,
	MO_STOACCEL		= 2,
	MO_MOTACCEL		= 3,
	MO_ADVSPEED		= 4,
	MO_RECSPEED		= 5,
	MO_MOTSPEED		= 6,
	MO_CURSPEED		= 7,
	MO_TERFORCE		= 8,
	MO_TERSPEED		= 9,
	MO_TERSLIDE		= 10,
	MO_REASPEED		= 11,
};


struct Motion
{
	Math::Vector	advanceAccel;	// acceleration starting (+)
	Math::Vector	recedeAccel;	// acceleration starting (+)
	Math::Vector	stopAccel;	// acceleration stoping (+)
	Math::Vector	motorAccel;	// current acceleration (+/-)

	Math::Vector	advanceSpeed;	// forward speed (+)
	Math::Vector	recedeSpeed;	// reversing speed (+)
	Math::Vector	motorSpeed;	// desired speed (+/-)
	Math::Vector	currentSpeed;	// current speed (+/-)

	Math::Vector	terrainForce;	// power of resistance of the ground (+)
	Math::Vector	terrainSpeed;	// speed of the ground (+/-)
	Math::Vector	terrainSlide;	// limit sliding speed (+)

	Math::Vector	realSpeed;	// real speed(+/-)

	Math::Vector	finalInclin;	// final inclination
};




class CPhysics
{
public:
	CPhysics(CInstanceManager* iMan, CObject* object);
	~CPhysics();

	void		DeleteObject(bool bAll=false);

	bool		EventProcess(const Event &event);

	void		SetBrain(CBrain* brain);
	void		SetMotion(CMotion* motion);

	void		SetType(PhysicsType type);
	PhysicsType	RetType();

	bool		Write(char *line);
	bool		Read(char *line);

	void		SetGravity(float value);
	float		RetGravity();

	float		RetFloorHeight();

	void		SetLinMotion(PhysicsMode mode, Math::Vector value);
	Math::Vector	RetLinMotion(PhysicsMode mode);
	void		SetLinMotionX(PhysicsMode mode, float value);
	void		SetLinMotionY(PhysicsMode mode, float value);
	void		SetLinMotionZ(PhysicsMode mode, float value);
	float		RetLinMotionX(PhysicsMode mode);
	float		RetLinMotionY(PhysicsMode mode);
	float		RetLinMotionZ(PhysicsMode mode);

	void		SetCirMotion(PhysicsMode mode, Math::Vector value);
	Math::Vector	RetCirMotion(PhysicsMode mode);
	void		SetCirMotionX(PhysicsMode mode, float value);
	void		SetCirMotionY(PhysicsMode mode, float value);
	void		SetCirMotionZ(PhysicsMode mode, float value);
	float		RetCirMotionX(PhysicsMode mode);
	float		RetCirMotionY(PhysicsMode mode);
	float		RetCirMotionZ(PhysicsMode mode);

	float		RetLinStopLength(PhysicsMode sMode=MO_ADVSPEED, PhysicsMode aMode=MO_STOACCEL);
	float		RetCirStopLength();
	float		RetLinMaxLength(float dir);
	float		RetLinTimeLength(float dist, float dir=1.0f);
	float		RetLinLength(float dist);

	void		SetMotor(bool bState);
	bool		RetMotor();
	void		SetLand(bool bState);
	bool		RetLand();
	void		SetSwim(bool bState);
	bool		RetSwim();
	void		SetCollision(bool bCollision);
	bool		RetCollision();
	void		SetFreeze(bool bFreeze);
	bool		RetFreeze();
	void		SetReactorRange(float range);
	float		RetReactorRange();

	void		SetMotorSpeed(Math::Vector speed);
	void		SetMotorSpeedX(float speed);
	void		SetMotorSpeedY(float speed);
	void		SetMotorSpeedZ(float speed);
	Math::Vector	RetMotorSpeed();
	float		RetMotorSpeedX();
	float		RetMotorSpeedY();
	float		RetMotorSpeedZ();

	void		CreateInterface(bool bSelect);
	Error		RetError();

protected:
	bool		EventFrame(const Event &event);
	void		WaterFrame(float aTime, float rTime);
	void		SoundMotor(float rTime);
	void		SoundMotorFull(float rTime, ObjectType type);
	void		SoundMotorSlow(float rTime, ObjectType type);
	void		SoundMotorStop(float rTime, ObjectType type);
	void		SoundReactorFull(float rTime, ObjectType type);
	void		SoundReactorStop(float rTime, ObjectType type);
	void		FrameParticule(float aTime, float rTime);
	void		MotorUpdate(float aTime, float rTime);
	void		EffectUpdate(float aTime, float rTime);
	void		UpdateMotionStruct(float rTime, Motion &motion);
	void		FloorAdapt(float aTime, float rTime, Math::Vector &pos, Math::Vector &angle);
	void		FloorAngle(const Math::Vector &pos, Math::Vector &angle);
	int			ObjectAdapt(const Math::Vector &pos, const Math::Vector &angle);
	bool		JostleObject(CObject* pObj, Math::Vector iPos, float iRad, Math::Vector oPos, float oRad);
	bool		JostleObject(CObject* pObj, float force);
	bool		ExploOther(ObjectType iType, CObject *pObj, ObjectType oType, float force);
	int			ExploHimself(ObjectType iType, ObjectType oType, float force);

	void		PowerParticule(float factor, bool bBreak);
	void		CrashParticule(float crash);
	void		MotorParticule(float aTime, float rTime);
	void		WaterParticule(float aTime, Math::Vector pos, ObjectType type, float floor, float advance, float turn);
	void		WheelParticule(int color, float width);

protected:
	CInstanceManager* m_iMan;
	CD3DEngine*	m_engine;
	CLight*		m_light;
	CParticule*	m_particule;
	CTerrain*	m_terrain;
	CWater*		m_water;
	CCamera*	m_camera;
	CObject*	m_object;
	CBrain*		m_brain;
	CMotion*	m_motion;
	CSound*		m_sound;

	PhysicsType	m_type;			// TYPE_*
	float		m_gravity;		// force of gravity
	float		m_time;			// absolute time
	Math::Vector	m_motorSpeed;		// motor speed (-1..1)
	Motion		m_linMotion;		// linear motion
	Motion		m_cirMotion;		// circular motion
	bool		m_bMotor;
	bool		m_bLand;
	bool		m_bSwim;
	bool		m_bCollision;
	bool		m_bObstacle;
	bool		m_bFreeze;
	int			m_repeatCollision;
	float		m_linVibrationFactor;
	float		m_cirVibrationFactor;
	float		m_inclinaisonFactor;
	float		m_lastPowerParticule;
	float		m_lastSlideParticule;
	float		m_lastMotorParticule;
	float		m_lastWaterParticule;
	float		m_lastUnderParticule;
	float		m_lastPloufParticule;
	float		m_lastFlameParticule;
	bool		m_bWheelParticuleBrake;
	Math::Vector	m_wheelParticulePos[2];
	float		m_absorbWater;
	float		m_reactorTemperature;
	float		m_reactorRange;
	float		m_timeReactorFail;
	float		m_timeUnderWater;
	float		m_lastEnergy;
	float		m_lastSoundWater;
	float		m_lastSoundInsect;
	float		m_restBreakParticule;
	float		m_floorLevel;		// ground level
	float		m_floorHeight;		// height above the ground
	int		m_soundChannel;
	int		m_soundChannelSlide;
	float		m_soundTimePshhh;
	float		m_soundTimeJostle;
	float		m_soundTimeBoum;
	bool		m_bSoundSlow;
	bool		m_bForceUpdate;
	bool		m_bLowLevel;
};