/* ScummVM - Graphic Adventure Engine
 *
 * ScummVM is the legal property of its developers, whose names
 * are too numerous to list here. Please refer to the COPYRIGHT
 * file distributed with this source distribution.
 *
 * 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/>.
 *
 */

/*
 * Copyright (C) 2006-2010 - Frictional Games
 *
 * This file is part of HPL1 Engine.
 */

#ifndef HPL_PHYSICS_BODY_NEWTON_H
#define HPL_PHYSICS_BODY_NEWTON_H

#include "hpl1/engine/libraries/newton/Newton.h"

#include "hpl1/engine/physics/PhysicsBody.h"

namespace hpl {

class cPhysicsBodyNewtonCallback : public iEntityCallback {
	void OnTransformUpdate(iEntity3D *apEntity);
};

class cPhysicsBodyNewton : public iPhysicsBody {
	friend class cPhysicsBodyNewtonCallback;

public:
	cPhysicsBodyNewton(const tString &asName, iPhysicsWorld *apWorld, iCollideShape *apShape);
	~cPhysicsBodyNewton();

	void SetMaterial(iPhysicsMaterial *apMaterial);

	void SetLinearVelocity(const cVector3f &avVel);
	cVector3f GetLinearVelocity() const;
	void SetAngularVelocity(const cVector3f &avVel);
	cVector3f GetAngularVelocity() const;
	void SetLinearDamping(float afDamping);
	float GetLinearDamping() const;
	void SetAngularDamping(float afDamping);
	float GetAngularDamping() const;
	void SetMaxLinearSpeed(float afSpeed);
	float GetMaxLinearSpeed() const;
	void SetMaxAngularSpeed(float afDamping);
	float GetMaxAngularSpeed() const;
	cMatrixf GetInertiaMatrix();

	void SetMass(float afMass);
	float GetMass() const;
	void SetMassCentre(const cVector3f &avCentre);
	cVector3f GetMassCentre() const;

	void AddForce(const cVector3f &avForce);
	void AddForceAtPosition(const cVector3f &avForce, const cVector3f &avPos);
	void AddTorque(const cVector3f &avTorque);
	void AddImpulse(const cVector3f &avImpulse);
	void AddImpulseAtPosition(const cVector3f &avImpulse, const cVector3f &avPos);

	void SetEnabled(bool abEnabled);
	bool GetEnabled() const;
	void SetAutoDisable(bool abEnabled);
	bool GetAutoDisable() const;
#if 0
	void SetAutoDisableLinearThreshold(float afThresold);
	float GetAutoDisableLinearThreshold() const;
	void SetAutoDisableAngularThreshold(float afThresold);
	float GetAutoDisableAngularThreshold() const;
	void SetAutoDisableNumSteps(int alNum);
	int GetAutoDisableNumSteps() const;
#endif
	void SetContinuousCollision(bool abOn);
	bool GetContinuousCollision();

	void SetGravity(bool abEnabled);
	bool GetGravity() const;

	void RenderDebugGeometry(iLowLevelGraphics *apLowLevel, const cColor &aColor);

	NewtonBody *GetNewtonBody() { return mpNewtonBody; }

	void ClearForces();

	void DeleteLowLevel();

	static void SetUseCallback(bool abX) { mbUseCallback = abX; }

private:
	static int BuoyancyPlaneCallback(const int32 alCollisionID, void *apContext,
									 const float *afGlobalSpaceMatrix, float *afGlobalSpacePlane);
	static void OnTransformCallback(const NewtonBody *apBody, const dFloat *apMatrix, int32);
	static void OnUpdateCallback(NewtonBody *apBody, float, int32);

	NewtonBody *mpNewtonBody;
	NewtonWorld *mpNewtonWorld;

	cPhysicsBodyNewtonCallback *mpCallback;

	static bool mbUseCallback;

	// Properties
	bool mbGravity;

	float mfMaxLinearSpeed;
	float mfMaxAngularSpeed;
	float mfMass;

	float mfAutoDisableLinearThreshold;
	float mfAutoDisableAngularThreshold;
	int mlAutoDisableNumSteps;

	// Forces that will be set and clear on update callback
	cVector3f mvTotalForce;
	cVector3f mvTotalTorque;
};

} // namespace hpl

#endif // HPL_PHYSICS_BODY_NEWTON_H