Irrlicht Engine

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//! Constructor
ISceneNode(	ISceneNode* parent, ISceneManager* mgr, s32 id=-1,
			const core::vector3df& position = core::vector3df(0,0,0),
			const core::vector3df& rotation = core::vector3df(0,0,0),
			const core::vector3df& scale = core::vector3df(1.0f, 1.0f, 1.0f))
	: IsVisible(true), ID(id), Parent(parent), SceneManager(mgr),
		AutomaticCullingEnabled(true), DebugDataVisible(false),
		TriangleSelector(0), RelativeTranslation(position),
		RelativeRotation(rotation), RelativeScale(scale)

{
	if (Parent)
		Parent->addChild(this);

	calcRelativeTransformation();
	updateAbsolutePosition();			
}

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virtual core::matrix4 getRelativeTransformation() const
{
	return RelativeTransformation;
}

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virtual void calcRelativeTransformation()
{
	RelativeTransformation.setRotationDegrees( RelativeRotation );
	RelativeTransformation.setTranslation( RelativeTranslation );

	if( RelativeScale != core::vector3df( 1.0f, 1.0f, 1.0f ) )
	{
		core::matrix4 smat;
		smat.setScale( RelativeScale );
		RelativeTransformation *= smat;
	}
}

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virtual void setScale(const core::vector3df& scale)
{
	RelativeScale = scale;
	calcRelativeTransformation();
}

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virtual void setRotation(const core::vector3df& rotation)
{
	RelativeRotation = rotation;
	calcRelativeTransformation();
}

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virtual void setPosition(const core::vector3df& newpos)
{
	RelativeTranslation = newpos;
	calcRelativeTransformation();		
}

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virtual void updateAbsolutePosition()
{
	if (Parent)
		AbsoluteTransformation = 
			Parent->getAbsoluteTransformation() * getRelativeTransformation();
	else
		AbsoluteTransformation = RelativeTransformation;
}

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//! relative transformation of the node.
core::matrix4 RelativeTransformation;