Ogre::BoneMemoryManager Class Reference

Wrap-around class that contains multiple ArrayMemoryManager, one per hierarchy depth. More...

#include <OgreBoneMemoryManager.h>

Inheritance diagram for Ogre::BoneMemoryManager:

Public Member Functions
	BoneMemoryManager ()
virtual	~BoneMemoryManager ()
void	_growToDepth (const vector< size_t >::type &bonesPerDepth)
	Since skeleton's hierarchy structure is known beforehand, we use this information for setting a better optimal cleanup value, to avoid excessive stalls when destroying skeleton instances.
virtual void	applyRebase (uint16 level, const MemoryPoolVec &newBasePtrs, const ArrayMemoryManager::PtrdiffVec &diffsList)
	Called when the manager already grew it's memory pool to honour more node requests.
virtual void	buildDiffList (uint16 level, const MemoryPoolVec &basePtrs, ArrayMemoryManager::PtrdiffVec &outDiffsList)
	Called when the manager needs to grow it's memory pool to honour more node requests.
size_t	getFirstNode (BoneTransform &outTransform, size_t depth)
	Retrieves a Transform pointing to the first Node in the given depth.
size_t	getNumDepths () const
	Retrieves the number of depth levels that have been created.
void	migrateTo (BoneTransform &inOutTransform, size_t depth, BoneMemoryManager *dstBoneMemoryManager)
	Releases memory belonging to us, not before copying it into another manager.
void	nodeAttached (BoneTransform &outTransform, size_t depth)
	Requests memory for the given transform to be attached, transferring existing values inside to the new memory block.
void	nodeCreated (BoneTransform &outTransform, size_t depth)
	Requests memory for the given transform for the first, initializing values.
void	nodeDestroyed (BoneTransform &outTransform, size_t depth)
	Releases current memory.
void	nodeDettached (BoneTransform &outTransform, size_t depth)
	Releases current memory and requests memory from the root level.
void	nodeMoved (BoneTransform &inOutTransform, size_t oldDepth, size_t newDepth)
	Requests memory for the given Node to be moved to a different depth level, transferring existing values inside to the new memory slot.
virtual void	performCleanup (uint16 level, const MemoryPoolVec &basePtrs, size_t const *elementsMemSizes, size_t startInstance, size_t diffInstances)
	Called when too many nodes were destroyed in a non-LIFO fashion.
void	setBoneRebaseListener (BySkeletonDef *l)

Detailed Description

Wrap-around class that contains multiple ArrayMemoryManager, one per hierarchy depth.

Remarks

This is the main memory manager that actually manages Bone, and have to be called when a new Bone was created, when a Bone gets detached from it's parent, when it's attached again, etc.

Note that some SceneManager implementations (i.e. Octree like) may want to have more than one BoneMemoryManager, for example one per octant.

Constructor & Destructor Documentation

BoneMemoryManager()

Ogre::BoneMemoryManager::BoneMemoryManager

(

)

~BoneMemoryManager()

virtual Ogre::BoneMemoryManager::~BoneMemoryManager ( )

virtual

Member Function Documentation

_growToDepth()

void Ogre::BoneMemoryManager::_growToDepth

(

const vector< size_t >::type &

bonesPerDepth

)

Since skeleton's hierarchy structure is known beforehand, we use this information for setting a better optimal cleanup value, to avoid excessive stalls when destroying skeleton instances.

applyRebase()

virtual void Ogre::BoneMemoryManager::applyRebase ( uint16  level, const MemoryPoolVec &  newBasePtrs, const ArrayMemoryManager::PtrdiffVec &  diffsList  )

virtual

Called when the manager already grew it's memory pool to honour more node requests.

Remarks

Will use the new base ptr and the list we built in

See also

buildDiffList() to know what mChunkPtr & mIndex needs to be set for each ArrayVector3/etc we have.

Parameters

level	The hierarchy depth level
newBasePtrs	The new base ptr.
diffsList	The list built in buildDiffList

Implements Ogre::ArrayMemoryManager::RebaseListener.

buildDiffList()

virtual void Ogre::BoneMemoryManager::buildDiffList ( uint16  level, const MemoryPoolVec &  basePtrs, ArrayMemoryManager::PtrdiffVec &  outDiffsList  )

virtual

Called when the manager needs to grow it's memory pool to honour more node requests.

See the class description on why we need to do this (to avoid C++ undefined behavior)

Remarks

Needs to builds a list that will contain the difference in bytes between each ArrayVector3/ArrayMatrix4/etc and the base pointers in_the_order in which the derived class holds those pointers (i.e. in the order the SceneNodes are arranged in memory)

Parameters

level	The hierarchy depth level
basePtrs	The base pointers from each pool so we can calculate the differences
utDiffsList	The list we'll generate. "outDiffsList" already has enough reserved space

Implements Ogre::ArrayMemoryManager::RebaseListener.

getFirstNode()

size_t Ogre::BoneMemoryManager::getFirstNode	(	BoneTransform &	outTransform,
		size_t	depth
	)

Retrieves a Transform pointing to the first Node in the given depth.

Parameters

outTransform	[out] Transform with filled pointers to the first Node in this depth
depth	Current hierarchy level depth it belongs to.

Returns

Number of Nodes in this depth level

getNumDepths()

size_t Ogre::BoneMemoryManager::getNumDepths

(

)

const

Retrieves the number of depth levels that have been created.

Remarks

The return value is equal or below mMemoryManagers.size(), you should cache the result instead of calling this function too often.

migrateTo()

void Ogre::BoneMemoryManager::migrateTo	(	BoneTransform &	inOutTransform,
		size_t	depth,
		BoneMemoryManager *	dstBoneMemoryManager
	)

Releases memory belonging to us, not before copying it into another manager.

Remarks

This function is useful when implementing multiple Memory Managers in Scene Managers or when switching nodes from Static to/from Dynamic.

Parameters

inOutTransform	Valid Transform that belongs to us. Output will belong to the other memory mgr.
depth	Current hierarchy level depth it belongs to.
dstBoneMemoryManager	BoneMemoryManager that will now own the transform.

nodeAttached()

void Ogre::BoneMemoryManager::nodeAttached	(	BoneTransform &	outTransform,
		size_t	depth
	)

Requests memory for the given transform to be attached, transferring existing values inside to the new memory block.

Remarks

Do NOT call this function twice in a row without having called nodeDettached in the middle

Parameters

outTransform	Transform with filled pointers
depth	Hierarchy level depth the node belongs to. If 0, nothing happens.

nodeCreated()

void Ogre::BoneMemoryManager::nodeCreated	(	BoneTransform &	outTransform,
		size_t	depth
	)

Requests memory for the given transform for the first, initializing values.

Parameters

outTransform	Transform with filled pointers
depth	Hierarchy level depth. 0 if not connected.

nodeDestroyed()

void Ogre::BoneMemoryManager::nodeDestroyed	(	BoneTransform &	outTransform,
		size_t	depth
	)

Releases current memory.

Parameters

outTransform	Transform with nullified pointers
depth	Current hierarchy level depth it belongs to.

nodeDettached()

void Ogre::BoneMemoryManager::nodeDettached	(	BoneTransform &	outTransform,
		size_t	depth
	)

Releases current memory and requests memory from the root level.

Remarks

Do NOT call this function twice in a row without having called nodeAttached in the middle

outTransform.mParents[outTransform.mIndex] is reset to a dummy parent node

Parameters

outTransform	Transform with filled pointers
depth	Current hierarchy level depth it belongs to. If 0, nothing happens.

nodeMoved()

void Ogre::BoneMemoryManager::nodeMoved	(	BoneTransform &	inOutTransform,
		size_t	oldDepth,
		size_t	newDepth
	)

Requests memory for the given Node to be moved to a different depth level, transferring existing values inside to the new memory slot.

Parameters

inOutTransform	Transform with filled pointers
oldDepth	Current hierarchy level depth it belongs to.
newDepth	Hierarchy level depth it wants to belongs to.

performCleanup()

virtual void Ogre::BoneMemoryManager::performCleanup ( uint16  level, const MemoryPoolVec &  basePtrs, size_t const *  elementsMemSizes, size_t  startInstance, size_t  diffInstances  )

virtual

Called when too many nodes were destroyed in a non-LIFO fashion.

Without cleaning up, the scene manager will waste CPU & bandwidth on processing vectors & matrices that are not in use. The more fragmented/unordered those removals were, the worst it is. Try to create everything static first, then dynamic content.

Remarks

The manager behaves similarly to a Garbage Collector, as it is triggered after certain amount of nodes have been freed (unless they respected LIFO order)

In a way, it's very similar to vector::remove(), as removing an element from the middle means we need to shift everything past that point one place (or more).

Parameters

level	The hierarchy depth level
basePtrs	The base ptrs.
startInstance	The instance to which past that we need to shift
diffInstances	How many places we need to shift backwards.

Implements Ogre::ArrayMemoryManager::RebaseListener.

setBoneRebaseListener()

void Ogre::BoneMemoryManager::setBoneRebaseListener ( BySkeletonDef *  l )

inline

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The documentation for this class was generated from the following file:

• OgreBoneMemoryManager.h