blender/source/gameengine/Ketsji/KX_SG_NodeRelationships.h

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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.
*
* interface
*
* $Id$
*
* ***** BEGIN GPL LICENSE BLOCK *****
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*
* 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.
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*
* 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,
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* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
* 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 LICENSE BLOCK *****
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*
*/
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#ifndef __KX_SG_NODERELATIONS_H__
#define __KX_SG_NODERELATIONS_H__
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#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
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UpdateChildCoordinates(
SG_Spatial * child,
const SG_Spatial * parent,
bool& parentUpdated
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);
/**
* Method inherited from KX_ParentRelation
*/
SG_ParentRelation *
NewCopy(
);
~KX_NormalParentRelation(
);
private :
KX_NormalParentRelation(
);
#ifdef WITH_CXX_GUARDEDALLOC
public:
void *operator new(size_t num_bytes) { return MEM_mallocN(num_bytes, "GE:KX_NormalParentRelation"); }
void operator delete( void *mem ) { MEM_freeN(mem); }
#endif
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};
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
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UpdateChildCoordinates(
SG_Spatial * child,
const SG_Spatial * parent,
bool& parentUpdated
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);
/**
* Method inherited from KX_ParentRelation
*/
SG_ParentRelation *
NewCopy(
);
~KX_VertexParentRelation(
);
bool
IsVertexRelation(
) {
return true;
}
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private :
KX_VertexParentRelation(
);
#ifdef WITH_CXX_GUARDEDALLOC
public:
void *operator new(size_t num_bytes) { return MEM_mallocN(num_bytes, "GE:KX_VertexParentRelation"); }
void operator delete( void *mem ) { MEM_freeN(mem); }
#endif
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};
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
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UpdateChildCoordinates(
SG_Spatial * child,
const SG_Spatial * parent,
bool& parentUpdated
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);
/**
* Method inherited from KX_ParentRelation
*/
SG_ParentRelation *
NewCopy(
);
MT_Scalar
GetTimeOffset(
) { return m_relax; }
void
SetTimeOffset(
MT_Scalar relaxation
) { m_relax = relaxation; }
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~KX_SlowParentRelation(
);
bool
IsSlowRelation(
) {
return true;
}
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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;
#ifdef WITH_CXX_GUARDEDALLOC
public:
void *operator new(size_t num_bytes) { return MEM_mallocN(num_bytes, "GE:KX_SlowParentRelation"); }
void operator delete( void *mem ) { MEM_freeN(mem); }
#endif
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};
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#endif