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/**
* @mainpage KX_SG_NodeRelationships
* @section
*
* This file provides common concrete implementations of
* SG_ParentRelation used by the game engine. These are
* KX_SlowParentRelation a slow parent relationship.
* KX_NormalParentRelation a normal parent relationship where
* orientation and position are inherited from the parent by
* the child.
* KX_VertexParentRelation only location information is
* inherited by the child.
*
* @see SG_ParentRelation for more information about this
* interface
*
* $Id$
*
* ***** BEGIN GPL/BL DUAL LICENSE BLOCK *****
*
* 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 2
* of the License, or (at your option) any later version. The Blender
* Foundation also sells licenses for use in proprietary software under
* the Blender License. See http://www.blender.org/BL/ for information
* about this.
*
* 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, write to the Free Software Foundation,
* Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
* The Original Code is Copyright (C) 2001-2002 by NaN Holding BV.
* All rights reserved.
*
* The Original Code is: all of this file.
*
* Contributor(s): none yet.
*
* ***** END GPL/BL DUAL LICENSE BLOCK *****
*
*/
#include "SG_Spatial.h"
#include "SG_ParentRelation.h"
class KX_NormalParentRelation : public SG_ParentRelation
{
public :
/**
* Allocate and construct a new KX_NormalParentRelation
* on the heap.
*/
static
KX_NormalParentRelation *
New(
);
/**
* Method inherited from KX_ParentRelation
*/
bool
UpdateChildCoordinates(
SG_Spatial * child,
const SG_Spatial * parent
);
/**
* Method inherited from KX_ParentRelation
*/
SG_ParentRelation *
NewCopy(
);
~KX_NormalParentRelation(
);
private :
KX_NormalParentRelation(
);
};
class KX_VertexParentRelation : public SG_ParentRelation
{
public :
/**
* Allocate and construct a new KX_VertexParentRelation
* on the heap.
*/
static
KX_VertexParentRelation *
New(
);
/**
* Method inherited from KX_ParentRelation
*/
bool
UpdateChildCoordinates(
SG_Spatial * child,
const SG_Spatial * parent
);
/**
* Method inherited from KX_ParentRelation
*/
SG_ParentRelation *
NewCopy(
);
~KX_VertexParentRelation(
);
private :
KX_VertexParentRelation(
);
};
class KX_SlowParentRelation : public SG_ParentRelation
{
public :
/**
* Allocate and construct a new KX_VertexParentRelation
* on the heap.
*/
static
KX_SlowParentRelation *
New(
MT_Scalar relaxation
);
/**
* Method inherited from KX_ParentRelation
*/
bool
UpdateChildCoordinates(
SG_Spatial * child,
const SG_Spatial * parent
);
/**
* Method inherited from KX_ParentRelation
*/
SG_ParentRelation *
NewCopy(
);
~KX_SlowParentRelation(
);
private :
KX_SlowParentRelation(
MT_Scalar relaxation
);
// the relaxation coefficient.
MT_Scalar m_relax;
/**
* Looks like a hack flag to me.
* We need to compute valid world coordinates the first
* time we update spatial data of the child. This is done
* by just doing a normal parent relation the first time
* UpdateChildCoordinates is called and then doing the
* slow parent relation
*/
bool m_initialized;
};
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