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/*
-----------------------------------------------------------------------------
This source file is part of OGRE
    (Object-oriented Graphics Rendering Engine)
For the latest info, see http://www.ogre3d.org/

Copyright (c) 2000-2006 Torus Knot Software Ltd
Also see acknowledgements in Readme.html

This program is free software; you can redistribute it and/or modify it under
the terms of the GNU Lesser General Public License as published by the Free Software
Foundation; either version 2 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 Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public License along with
this program; if not, write to the Free Software Foundation, Inc., 59 Temple
Place - Suite 330, Boston, MA 02111-1307, USA, or go to
http://www.gnu.org/copyleft/lesser.txt.

You may alternatively use this source under the terms of a specific version of
the OGRE Unrestricted License provided you have obtained such a license from
Torus Knot Software Ltd.
-----------------------------------------------------------------------------
*/
#ifndef __TagPoint_H_
#define __TagPoint_H_

#include "OgrePrerequisites.h"

#include "OgreBone.h"
#include "OgreMatrix4.h"

namespace Ogre	{


	
    /** A tagged point on a skeleton, which can be used to attach entities to on specific
        other entities.
    @remarks
        A Skeleton, like a Mesh, is shared between Entity objects and simply updated as required
        when it comes to rendering. However there are times when you want to attach another object
        to an animated entity, and make sure that attachment follows the parent entity's animation
        (for example, a character holding a gun in his / her hand). This class simply identifies
        attachment points on a skeleton which can be used to attach child objects. 
    @par
        The child objects themselves are not physically attached to this class; as it's name suggests
        this class just 'tags' the area. The actual child objects are attached to the Entity using the
        skeleton which has this tag point. Use the Entity::attachMovableObjectToBone method to attach
        the objects, which creates a new TagPoint on demand.
    */
    class _OgreExport TagPoint : public Bone
	{

	public:
		TagPoint(unsigned short handle, Skeleton* creator);
		virtual ~TagPoint();

		Entity *getParentEntity(void) const;
        MovableObject* getChildObject(void) const;
		
		void setParentEntity(Entity *pEntity);
		void setChildObject(MovableObject *pObject);

        /** Tells the TagPoint whether it should inherit orientation from it's parent entity.
        @param inherit If true, this TagPoint's orientation will be affected by
            its parent entity's orientation. If false, it will not be affected.
        */
        void setInheritParentEntityOrientation(bool inherit);

        /** Returns true if this TagPoint is affected by orientation applied to the parent entity. 
        */
        bool getInheritParentEntityOrientation(void) const;

        /** Tells the TagPoint whether it should inherit scaling factors from it's parent entity.
        @param inherit If true, this TagPoint's scaling factors will be affected by
            its parent entity's scaling factors. If false, it will not be affected.
        */
        void setInheritParentEntityScale(bool inherit);

        /** Returns true if this TagPoint is affected by scaling factors applied to the parent entity. 
        */
        bool getInheritParentEntityScale(void) const;

		/** Gets the transform of parent entity. */
		const Matrix4& getParentEntityTransform(void) const;

        /** Gets the transform of this node just for the skeleton (not entity) */
		const Matrix4& _getFullLocalTransform(void) const;

        /** @copydoc Node::needUpdate */
        void needUpdate(bool forceParentUpdate = false);

        /** Overridden from Node in order to include parent Entity transform. */
        void updateFromParentImpl(void) const;
        /** @copydoc Renderable::getLights */
        const LightList& getLights(void) const;



	private:
		Entity *mParentEntity;
		MovableObject *mChildObject;
        mutable Matrix4 mFullLocalTransform;
        bool mInheritParentEntityOrientation;
        bool mInheritParentEntityScale;
	};


} //namespace


#endif//__TagPoint_H_
OgreTagPoint.h
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