Ogre::InstancedGeometry Class Reference

Pre-transforms and batches up meshes for efficient use as instanced geometry in a scene. More...

#include <OgreInstancedGeometry.h>

Inheritance diagram for Ogre::InstancedGeometry:

Collaboration diagram for Ogre::InstancedGeometry:

Classes
class	BatchInstance
	The details of a topological BatchInstance which is the highest level of partitioning for this class. More...
class	GeometryBucket
	A GeometryBucket is a the lowest level bucket where geometry with the same vertex & index format is stored. More...
class	InstancedObject
class	LODBucket
	A LODBucket is a collection of smaller buckets with the same LOD. More...
class	MaterialBucket
	A MaterialBucket is a collection of smaller buckets with the same Material (and implicitly the same LOD). More...
class	OptimisedSubMeshGeometry
	Struct holding geometry optimised per SubMesh / lod level, ready for copying to instances. More...
struct	QueuedGeometry
	Structure recording a queued geometry for low level builds. More...
struct	QueuedSubMesh
	Structure recording a queued submesh for the build. More...
struct	SubMeshLodGeometryLink
	Saved link between SubMesh at a LOD and vertex/index data May point to original or optimised geometry. More...

Public Types
typedef MapIterator < BatchInstanceMap >	BatchInstanceIterator
	Iterator for iterating over contained BatchInstances. More...
typedef map< uint32, BatchInstance * >::type	BatchInstanceMap
	Indexed BatchInstance map based on packed x/y/z BatchInstance index, 10 bits for each axis. More...
typedef list < OptimisedSubMeshGeometry * > ::type	OptimisedSubMeshGeometryList
typedef vector< QueuedGeometry * > ::type	QueuedGeometryList
typedef vector< QueuedSubMesh * > ::type	QueuedSubMeshList
typedef vector< String >::type	QueuedSubMeshOriginList
typedef vector < RenderOperation * >::type	RenderOperationVector
	Simple vectors where are stored all the renderoperations of the Batch. More...
typedef map< SubMesh *, SubMeshLodGeometryLinkList * > ::type	SubMeshGeometryLookup
typedef vector < SubMeshLodGeometryLink > ::type	SubMeshLodGeometryLinkList

Public Member Functions
	InstancedGeometry (SceneManager *owner, const String &name)
	Constructor; do not use directly (. More...
virtual	~InstancedGeometry ()
	Destructor. More...
void	addBatchInstance (void)
	Add a new batch instance. More...
virtual void	addEntity (Entity *ent, const Vector3 &position, const Quaternion &orientation=Quaternion::IDENTITY, const Vector3 &scale=Vector3::UNIT_SCALE)
	Adds an Entity to the static geometry. More...
virtual void	addSceneNode (const SceneNode *node)
	Adds all the Entity objects attached to a SceneNode and all it's children to the static geometry. More...
virtual void	build (void)
	Build the geometry. More...
virtual void	destroy (void)
	Destroys all the built geometry state (reverse of build). More...
virtual void	dump (const String &filename) const
	Dump the contents of this InstancedGeometry to a file for diagnostic purposes. More...
AnimationStateSet *	getBaseAnimationState (void)
SkeletonPtr	getBaseSkeleton (void)
SkeletonInstance *	getBaseSkeletonInstance (void)
virtual const Vector3 &	getBatchInstanceDimensions (void) const
	Gets the size of a single batch of geometry. More...
BatchInstanceIterator	getBatchInstanceIterator (void)
	Get an iterator over the BatchInstances in this geometry. More...
virtual bool	getCastShadows (void)
	Will the geometry from this object cast shadows? More...
const String &	getName (void) const
	Get the name of this object. More...
unsigned int	getObjectCount (void)
virtual const Vector3 &	getOrigin (void) const
	Gets the origin of this geometry. More...
virtual bool	getProvideWorldInverses (void) const
virtual Real	getRenderingDistance (void) const
	Gets the distance at which batches are no longer rendered. More...
RenderOperationVector &	getRenderOperationVector ()
	get the mRenderOps vector. More...
virtual uint8	getRenderQueueGroup (void) const
	Gets the queue group for this entity, see setRenderQueueGroup for full details. More...
virtual Real	getSquaredRenderingDistance (void) const
	Gets the squared distance at which batches are no longer rendered. More...
virtual bool	isVisible (void) const
	Are the batches visible? More...
void	operator delete (void *ptr)
void	operator delete (void *ptr, void *)
void	operator delete (void *ptr, const char *, int, const char *)
void	operator delete[] (void *ptr)
void	operator delete[] (void *ptr, const char *, int, const char *)
void *	operator new (size_t sz, const char *file, int line, const char *func)
	operator new, with debug line info More...
void *	operator new (size_t sz)
void *	operator new (size_t sz, void *ptr)
	placement operator new More...
void *	operator new[] (size_t sz, const char *file, int line, const char *func)
	array operator new, with debug line info More...
void *	operator new[] (size_t sz)
virtual void	reset (void)
	Clears any of the entities / nodes added to this geometry and destroys anything which has already been built. More...
virtual void	setBatchInstanceDimensions (const Vector3 &size)
	Sets the size of a single BatchInstance of geometry. More...
virtual void	setCastShadows (bool castShadows)
	Sets whether this geometry should cast shadows. More...
virtual void	setOrigin (const Vector3 &origin)
	Sets the origin of the geometry. More...
virtual void	setProvideWorldInverses (bool flag)
virtual void	setRenderingDistance (Real dist)
	Sets the distance at which batches are no longer rendered. More...
virtual void	setRenderQueueGroup (uint8 queueID)
	Sets the render queue group this object will be rendered through. More...
virtual void	setVisible (bool visible)
	Hides or shows all the batches. More...
void	visitRenderables (Renderable::Visitor *visitor, bool debugRenderables=false)
	Method to allow a caller to abstractly iterate over the Renderable instances that this MovableObject will add to the render queue when asked, if any. More...

Protected Types
typedef map< size_t, size_t >::type	IndexRemap

Protected Member Functions
template<typename T >
void	buildIndexRemap (T *pBuffer, size_t numIndexes, IndexRemap &remap)
	Method for figuring out which vertices are used by an index buffer and calculating a remap lookup for a vertex buffer just containing those vertices. More...
virtual AxisAlignedBox	calculateBounds (VertexData *vertexData, const Vector3 &position, const Quaternion &orientation, const Vector3 &scale)
	Calculate world bounds from a set of vertex data. More...
SubMeshLodGeometryLinkList *	determineGeometry (SubMesh *sm)
	Look up or calculate the geometry data to use for this SubMesh. More...
virtual BatchInstance *	getBatchInstance (const AxisAlignedBox &bounds, bool autoCreate)
	Virtual method for getting a BatchInstance most suitable for the passed in bounds. More...
virtual BatchInstance *	getBatchInstance (const Vector3 &point, bool autoCreate)
	Get the BatchInstance within which a point lies. More...
virtual BatchInstance *	getBatchInstance (ushort x, ushort y, ushort z, bool autoCreate)
	Get the BatchInstance using indexes. More...
virtual BatchInstance *	getBatchInstance (uint32 index)
	Get the BatchInstance using a packed index, returns null if it doesn't exist. More...
virtual AxisAlignedBox	getBatchInstanceBounds (ushort x, ushort y, ushort z)
	Get the bounds of an indexed BatchInstance. More...
virtual Vector3	getBatchInstanceCentre (ushort x, ushort y, ushort z)
	Get the centre of an indexed BatchInstance. More...
virtual void	getBatchInstanceIndexes (const Vector3 &point, ushort &x, ushort &y, ushort &z)
	Get the BatchInstance indexes for a point. More...
virtual BatchInstance *	getInstancedGeometryInstance (void)
	get the first BatchInstance or create on if it does not exists. More...
virtual Real	getVolumeIntersection (const AxisAlignedBox &box, ushort x, ushort y, ushort z)
	Get the volume intersection for an indexed BatchInstance with some bounds. More...
virtual uint32	packIndex (ushort x, ushort y, ushort z)
	Pack 3 indexes into a single index value. More...
template<typename T >
void	remapIndexes (T *src, T *dst, const IndexRemap &remap, size_t numIndexes)
	Method for altering indexes based on a remap. More...
void	splitGeometry (VertexData *vd, IndexData *id, SubMeshLodGeometryLink *targetGeomLink)
	Split some shared geometry into dedicated geometry. More...

Protected Attributes
AnimationStateSet *	mAnimationState
	This is the main animation state. More...
SkeletonPtr	mBaseSkeleton
	this is just a pointer to the base skeleton that will be used for each animated object in the batches This pointer has a value only during the creation of the InstancedGeometry More...
Vector3	mBatchInstanceDimensions
BatchInstanceMap	mBatchInstanceMap
	Map of BatchInstances. More...
bool	mBuilt
bool	mCastShadows
Vector3	mHalfBatchInstanceDimensions
BatchInstance *	mInstancedGeometryInstance
String	mName
unsigned int	mObjectCount
	number of objects in the batch More...
OptimisedSubMeshGeometryList	mOptimisedSubMeshGeometryList
	List of geometry which has been optimised for SubMesh use This is the primary storage used for cleaning up later. More...
Vector3	mOrigin
SceneManager *	mOwner
bool	mProvideWorldInverses
	Flags to indicate whether the World Transform Inverse matrices are passed to the shaders. More...
QueuedSubMeshList	mQueuedSubMeshes
RenderOperationVector	mRenderOps
	This vector stores all the renderOperation used in the batch. More...
uint8	mRenderQueueID
	The render queue to use when rendering this object. More...
bool	mRenderQueueIDSet
	Flags whether the RenderQueue's default should be used. More...
SkeletonInstance *	mSkeletonInstance
Real	mSquaredUpperDistance
SubMeshGeometryLookup	mSubMeshGeometryLookup
	Cached links from SubMeshes to (potentially optimised) geometry This is not used for deletion since the lookup may reference original vertex data. More...
Real	mUpperDistance
bool	mVisible

Detailed Description

Pre-transforms and batches up meshes for efficient use as instanced geometry in a scene.

Remarks

Shader instancing allows to save both memory and draw calls. While StaticGeometry stores 500 times the same object in a batch to display 500 objects, this shader instancing implementation stores only 80 times the object, and then re-uses the vertex data with different shader parameter. Although you save memory, you make more draw call. However, you still make less draw calls than if you were rendering each object independently. Plus, you can move the batched objects independently of one another which you cannot do with StaticGeometry.

Therefore it is important when you are rendering a lot of geometry to batch things up into as few rendering calls as possible. This class allows you to build a batched object from a series of entities in order to benefit from this behaviour. Batching has implications of it's own though:

• Batched geometry cannot be subdivided; that means that the whole group will be displayed, or none of it will. This obivously has culling issues.
• A single material must apply for each batch. In fact this class allows you to use multiple materials, but you should be aware that internally this means that there is one batch per material. Therefore you won't gain as much benefit from the batching if you use many different materials; try to keep the number down.

The bounding box information is computed whith object position only. It doesn't take account of the object orientation.

The LOD settings of both the Mesh and the Materials used in constructing this instanced geometry will be respected. This means that if you use meshes/materials which have LOD, batches in the distance will have a lower polygon count or material detail to those in the foreground. Since each mesh might have different LOD distances, during build the furthest distance at each LOD level from all meshes in that BatchInstance is used. This means all the LOD levels change at the same time, but at the furthest distance of any of them (so quality is not degraded). Be aware that using Mesh LOD in this class will further increase the memory required. Only generated LOD is supported for meshes.

There are 2 ways you can add geometry to this class; you can add Entity objects directly with predetermined positions, scales and orientations, or you can add an entire SceneNode and it's subtree, including all the objects attached to it. Once you've added everthing you need to, you have to call build() the fix the geometry in place.

You should not construct instances of this class directly; instead, call SceneManager::createInstancedGeometry, which gives the SceneManager the option of providing you with a specialised version of this class if it wishes, and also handles the memory management for you like other classes.

Note

Warning: this class only works with indexed triangle lists at the moment, do not pass it triangle strips, fans or lines / points, or unindexed geometry.

Definition at line 104 of file OgreInstancedGeometry.h.

Member Typedef Documentation

typedef MapIterator<BatchInstanceMap> Ogre::InstancedGeometry::BatchInstanceIterator

Iterator for iterating over contained BatchInstances.

Definition at line 828 of file OgreInstancedGeometry.h.

typedef map<uint32, BatchInstance*>::type Ogre::InstancedGeometry::BatchInstanceMap

Indexed BatchInstance map based on packed x/y/z BatchInstance index, 10 bits for each axis.

Definition at line 524 of file OgreInstancedGeometry.h.

typedef map<size_t, size_t>::type Ogre::InstancedGeometry::IndexRemap

protected

Definition at line 618 of file OgreInstancedGeometry.h.

typedef list<OptimisedSubMeshGeometry*>::type Ogre::InstancedGeometry::OptimisedSubMeshGeometryList

Definition at line 131 of file OgreInstancedGeometry.h.

typedef vector<QueuedGeometry*>::type Ogre::InstancedGeometry::QueuedGeometryList

Definition at line 166 of file OgreInstancedGeometry.h.

typedef vector<QueuedSubMesh*>::type Ogre::InstancedGeometry::QueuedSubMeshList

Definition at line 155 of file OgreInstancedGeometry.h.

typedef vector<String>::type Ogre::InstancedGeometry::QueuedSubMeshOriginList

Definition at line 156 of file OgreInstancedGeometry.h.

typedef vector<RenderOperation*>::type Ogre::InstancedGeometry::RenderOperationVector

Simple vectors where are stored all the renderoperations of the Batch.

This vector is used when we want to delete the batch, in order to delete only one time each render operation.

Definition at line 530 of file OgreInstancedGeometry.h.

typedef map<SubMesh*, SubMeshLodGeometryLinkList*>::type Ogre::InstancedGeometry::SubMeshGeometryLookup

Definition at line 140 of file OgreInstancedGeometry.h.

typedef vector<SubMeshLodGeometryLink>::type Ogre::InstancedGeometry::SubMeshLodGeometryLinkList

Definition at line 139 of file OgreInstancedGeometry.h.

Constructor & Destructor Documentation

Ogre::InstancedGeometry::InstancedGeometry	(	SceneManager *	owner,
		const String &	name
	)

Constructor; do not use directly (.

See also

SceneManager::createInstancedGeometry)

virtual Ogre::InstancedGeometry::~InstancedGeometry ( )

virtual

Destructor.

Member Function Documentation

void Ogre::InstancedGeometry::addBatchInstance

(

void

)

Add a new batch instance.

Remarks

This method add a new instance of the whole batch, by creating a new BatchInstance, containing new lod buckets, material buckets and geometry buckets. The new geometry buckets will use the same buffers as the base bucket.

Note

no note

virtual void Ogre::InstancedGeometry::addEntity ( Entity *  ent, const Vector3 &  position, const Quaternion &  orientation = Quaternion::IDENTITY, const Vector3 &  scale = Vector3::UNIT_SCALE  )

virtual

Adds an Entity to the static geometry.

Remarks

This method takes an existing Entity and adds its details to the list of elements to include when building. Note that the Entity itself is not copied or referenced in this method; an Entity is passed simply so that you can change the materials of attached SubEntity objects if you want. You can add the same Entity instance multiple times with different material settings completely safely, and destroy the Entity before destroying this InstancedGeometry if you like. The Entity passed in is simply used as a definition.

Note

Must be called before 'build'.

All added entities must use the same lod strategy.

Parameters

ent	The Entity to use as a definition (the Mesh and Materials referenced will be recorded for the build call).
position	The world position at which to add this Entity
orientation	The world orientation at which to add this Entity
scale	The scale at which to add this entity

virtual void Ogre::InstancedGeometry::addSceneNode ( const SceneNode *  node )

virtual

Adds all the Entity objects attached to a SceneNode and all it's children to the static geometry.

Remarks

This method performs just like addEntity, except it adds all the entities attached to an entire sub-tree to the geometry. The position / orientation / scale parameters are taken from the node structure instead of being specified manually.

Note

The SceneNode you pass in will not be automatically detached from it's parent, so if you have this node already attached to the scene graph, you will need to remove it if you wish to avoid the overhead of rendering both the original objects and their new static versions! We don't do this for you incase you are preparing this in advance and so don't want the originals detached yet.

Must be called before 'build'.

All added entities must use the same lod strategy.

Parameters

node	Pointer to the node to use to provide a set of Entity templates

virtual void Ogre::InstancedGeometry::build ( void  )

virtual

Build the geometry.

Remarks

Based on all the entities which have been added, and the batching options which have been set, this method constructs the batched geometry structures required. The batches are added to the scene and will be rendered unless you specifically hide them.

Note

Once you have called this method, you can no longer add any more entities.

template<typename T >

void Ogre::InstancedGeometry::buildIndexRemap ( T *  pBuffer, size_t  numIndexes, IndexRemap &  remap  )

inlineprotected

Method for figuring out which vertices are used by an index buffer and calculating a remap lookup for a vertex buffer just containing those vertices.

Definition at line 624 of file OgreInstancedGeometry.h.

virtual AxisAlignedBox Ogre::InstancedGeometry::calculateBounds ( VertexData *  vertexData, const Vector3 &  position, const Quaternion &  orientation, const Vector3 &  scale  )

protectedvirtual

Calculate world bounds from a set of vertex data.

virtual void Ogre::InstancedGeometry::destroy ( void  )

virtual

Destroys all the built geometry state (reverse of build).

Remarks

You can call build() again after this and it will pick up all the same entities / nodes you queued last time.

SubMeshLodGeometryLinkList* Ogre::InstancedGeometry::determineGeometry ( SubMesh *  sm )

protected

Look up or calculate the geometry data to use for this SubMesh.

virtual void Ogre::InstancedGeometry::dump ( const String &  filename ) const

virtual

Dump the contents of this InstancedGeometry to a file for diagnostic purposes.

AnimationStateSet* Ogre::InstancedGeometry::getBaseAnimationState ( void  )

inline

Remarks

Return the animation state that will be cloned each time an InstancedObject is made

Definition at line 855 of file OgreInstancedGeometry.h.

SkeletonPtr Ogre::InstancedGeometry::getBaseSkeleton ( void  )

inline

Remarks

Return the skeleton that is shared by all instanced objects.

Definition at line 850 of file OgreInstancedGeometry.h.

SkeletonInstance* Ogre::InstancedGeometry::getBaseSkeletonInstance ( void  )

inline

Remarks

Return the skeletonInstance that will be used

Definition at line 845 of file OgreInstancedGeometry.h.

virtual BatchInstance* Ogre::InstancedGeometry::getBatchInstance ( const AxisAlignedBox &  bounds, bool  autoCreate  )

protectedvirtual

Virtual method for getting a BatchInstance most suitable for the passed in bounds.

Can be overridden by subclasses.

virtual BatchInstance* Ogre::InstancedGeometry::getBatchInstance ( const Vector3 &  point, bool  autoCreate  )

protectedvirtual

Get the BatchInstance within which a point lies.

virtual BatchInstance* Ogre::InstancedGeometry::getBatchInstance ( ushort  x, ushort  y, ushort  z, bool  autoCreate  )

protectedvirtual

Get the BatchInstance using indexes.

virtual BatchInstance* Ogre::InstancedGeometry::getBatchInstance ( uint32  index )

protectedvirtual

Get the BatchInstance using a packed index, returns null if it doesn't exist.

virtual AxisAlignedBox Ogre::InstancedGeometry::getBatchInstanceBounds ( ushort  x, ushort  y, ushort  z  )

protectedvirtual

Get the bounds of an indexed BatchInstance.

virtual Vector3 Ogre::InstancedGeometry::getBatchInstanceCentre ( ushort  x, ushort  y, ushort  z  )

protectedvirtual

Get the centre of an indexed BatchInstance.

virtual const Vector3& Ogre::InstancedGeometry::getBatchInstanceDimensions ( void  ) const

inlinevirtual

Gets the size of a single batch of geometry.

Definition at line 796 of file OgreInstancedGeometry.h.

virtual void Ogre::InstancedGeometry::getBatchInstanceIndexes ( const Vector3 &  point, ushort &  x, ushort &  y, ushort &  z  )

protectedvirtual

Get the BatchInstance indexes for a point.

BatchInstanceIterator Ogre::InstancedGeometry::getBatchInstanceIterator

(

void

)

Get an iterator over the BatchInstances in this geometry.

virtual bool Ogre::InstancedGeometry::getCastShadows ( void  )

inlinevirtual

Will the geometry from this object cast shadows?

Definition at line 779 of file OgreInstancedGeometry.h.

virtual BatchInstance* Ogre::InstancedGeometry::getInstancedGeometryInstance ( void  )

protectedvirtual

get the first BatchInstance or create on if it does not exists.

const String& Ogre::InstancedGeometry::getName ( void  ) const

inline

Get the name of this object.

Definition at line 656 of file OgreInstancedGeometry.h.

unsigned int Ogre::InstancedGeometry::getObjectCount ( void  )

inline

Remarks

return the total number of object that are in all the batches

Definition at line 860 of file OgreInstancedGeometry.h.

virtual const Vector3& Ogre::InstancedGeometry::getOrigin ( void  ) const

inlinevirtual

Gets the origin of this geometry.

Definition at line 810 of file OgreInstancedGeometry.h.

virtual bool Ogre::InstancedGeometry::getProvideWorldInverses ( void  ) const

inlinevirtual

Remarks

Returns the toggle state indicating whether the World Transform INVERSE matrices would be passed to the shaders.

Definition at line 875 of file OgreInstancedGeometry.h.

virtual Real Ogre::InstancedGeometry::getRenderingDistance ( void  ) const

inlinevirtual

Gets the distance at which batches are no longer rendered.

Definition at line 748 of file OgreInstancedGeometry.h.

RenderOperationVector& Ogre::InstancedGeometry::getRenderOperationVector ( )

inline

get the mRenderOps vector.

Definition at line 832 of file OgreInstancedGeometry.h.

virtual uint8 Ogre::InstancedGeometry::getRenderQueueGroup ( void  ) const

virtual

Gets the queue group for this entity, see setRenderQueueGroup for full details.

virtual Real Ogre::InstancedGeometry::getSquaredRenderingDistance ( void  ) const

inlinevirtual

Gets the squared distance at which batches are no longer rendered.

Definition at line 751 of file OgreInstancedGeometry.h.

virtual Real Ogre::InstancedGeometry::getVolumeIntersection ( const AxisAlignedBox &  box, ushort  x, ushort  y, ushort  z  )

protectedvirtual

Get the volume intersection for an indexed BatchInstance with some bounds.

virtual bool Ogre::InstancedGeometry::isVisible ( void  ) const

inlinevirtual

Are the batches visible?

Definition at line 758 of file OgreInstancedGeometry.h.

template<class Alloc >

void Ogre::AllocatedObject< Alloc >::operator delete ( void *  ptr )

inlineinherited

Definition at line 95 of file OgreMemoryAllocatedObject.h.

template<class Alloc >

void Ogre::AllocatedObject< Alloc >::operator delete ( void *  ptr, void *    )

inlineinherited

Definition at line 101 of file OgreMemoryAllocatedObject.h.

template<class Alloc >

void Ogre::AllocatedObject< Alloc >::operator delete ( void *  ptr, const char *  , int  , const char *    )

inlineinherited

Definition at line 107 of file OgreMemoryAllocatedObject.h.

template<class Alloc >

void Ogre::AllocatedObject< Alloc >::operator delete[] ( void *  ptr )

inlineinherited

Definition at line 112 of file OgreMemoryAllocatedObject.h.

template<class Alloc >

void Ogre::AllocatedObject< Alloc >::operator delete[] ( void *  ptr, const char *  , int  , const char *    )

inlineinherited

Definition at line 118 of file OgreMemoryAllocatedObject.h.

template<class Alloc >

void* Ogre::AllocatedObject< Alloc >::operator new ( size_t  sz, const char *  file, int  line, const char *  func  )

inlineinherited

operator new, with debug line info

Definition at line 67 of file OgreMemoryAllocatedObject.h.

template<class Alloc >

void* Ogre::AllocatedObject< Alloc >::operator new ( size_t  sz )

inlineinherited

Definition at line 72 of file OgreMemoryAllocatedObject.h.

template<class Alloc >

void* Ogre::AllocatedObject< Alloc >::operator new ( size_t  sz, void *  ptr  )

inlineinherited

placement operator new

Definition at line 78 of file OgreMemoryAllocatedObject.h.

template<class Alloc >

void* Ogre::AllocatedObject< Alloc >::operator new[] ( size_t  sz, const char *  file, int  line, const char *  func  )

inlineinherited

array operator new, with debug line info

Definition at line 85 of file OgreMemoryAllocatedObject.h.

template<class Alloc >

void* Ogre::AllocatedObject< Alloc >::operator new[] ( size_t  sz )

inlineinherited

Definition at line 90 of file OgreMemoryAllocatedObject.h.

virtual uint32 Ogre::InstancedGeometry::packIndex ( ushort  x, ushort  y, ushort  z  )

protectedvirtual

Pack 3 indexes into a single index value.

template<typename T >

void Ogre::InstancedGeometry::remapIndexes ( T *  src, T *  dst, const IndexRemap &  remap, size_t  numIndexes  )

inlineprotected

Method for altering indexes based on a remap.

Definition at line 637 of file OgreInstancedGeometry.h.

virtual void Ogre::InstancedGeometry::reset ( void  )

virtual

Clears any of the entities / nodes added to this geometry and destroys anything which has already been built.

virtual void Ogre::InstancedGeometry::setBatchInstanceDimensions ( const Vector3 &  size )

inlinevirtual

Sets the size of a single BatchInstance of geometry.

Remarks

This method allows you to configure the physical world size of each BatchInstance, so you can balance culling against batch size. Entities will be fitted within the batch they most closely fit, and the eventual bounds of each batch may well be slightly larger than this if they overlap a little. The default is Vector3(1000, 1000, 1000).

Note

Must be called before 'build'.

Parameters

size	Vector3 expressing the 3D size of each BatchInstance.

Definition at line 791 of file OgreInstancedGeometry.h.

virtual void Ogre::InstancedGeometry::setCastShadows ( bool  castShadows )

virtual

Sets whether this geometry should cast shadows.

Remarks

No matter what the settings on the original entities, the InstancedGeometry class defaults to not casting shadows. This is because, being static, unless you have moving lights you'd be better to use precalculated shadows of some sort. However, if you need them, you can enable them using this method. If the SceneManager is set up to use stencil shadows, edge lists will be copied from the underlying meshes on build. It is essential that all meshes support stencil shadows in this case.

Note

If you intend to use stencil shadows, you must set this to true before calling 'build' as well as making sure you set the scene's shadow type (that should always be the first thing you do anyway). You can turn shadows off temporarily but they can never be turned on if they were not at the time of the build.

virtual void Ogre::InstancedGeometry::setOrigin ( const Vector3 &  origin )

inlinevirtual

Sets the origin of the geometry.

Remarks

This method allows you to configure the world centre of the geometry, thus the place which all BatchInstances surround. You probably don't need to mess with this unless you have a seriously large world, since the default set up can handle an area 1024 * mBatchInstanceDimensions, and the sparseness of population is no issue when it comes to rendering. The default is Vector3(0,0,0).

Note

Must be called before 'build'.

Parameters

size	Vector3 expressing the 3D origin of the geometry.

Definition at line 808 of file OgreInstancedGeometry.h.

virtual void Ogre::InstancedGeometry::setProvideWorldInverses ( bool  flag )

virtual

Remarks

Allows World Transform Inverse matrices to be passed as shader constants along with the world transform matrix list. Reduces the number of usable geometries in an instance to 40 instead of 80. The inverse matrices are interleaved with the world matrices at n+1.

virtual void Ogre::InstancedGeometry::setRenderingDistance ( Real  dist )

inlinevirtual

Sets the distance at which batches are no longer rendered.

Remarks

This lets you turn off batches at a given distance. This can be useful for things like detail meshes (grass, foliage etc) and could be combined with a shader which fades the geometry out beforehand to lessen the effect.

Parameters

dist	Distance beyond which the batches will not be rendered (the default is 0, which means batches are always rendered).

Definition at line 742 of file OgreInstancedGeometry.h.

virtual void Ogre::InstancedGeometry::setRenderQueueGroup ( uint8  queueID )

virtual

Sets the render queue group this object will be rendered through.

Remarks

Render queues are grouped to allow you to more tightly control the ordering of rendered objects. If you do not call this method, all objects default to the default queue (RenderQueue::getDefaultQueueGroup), which is fine for most objects. You may want to alter this if you want to perform more complex rendering.

See RenderQueue for more details.

Parameters

queueID

Enumerated value of the queue group to use.

virtual void Ogre::InstancedGeometry::setVisible ( bool  visible )

virtual

Hides or shows all the batches.

void Ogre::InstancedGeometry::splitGeometry ( VertexData *  vd, IndexData *  id, SubMeshLodGeometryLink *  targetGeomLink  )

protected

Split some shared geometry into dedicated geometry.

void Ogre::InstancedGeometry::visitRenderables	(	Renderable::Visitor *	visitor,
		bool	debugRenderables = false
	)

Method to allow a caller to abstractly iterate over the Renderable instances that this MovableObject will add to the render queue when asked, if any.

Parameters

visitor	Pointer to a class implementing the Renderable::Visitor interface which will be called back for each Renderable which will be queued. Bear in mind that the state of the Renderable instances may not be finalised depending on when you call this.
debugRenderables	If false, only regular renderables will be visited (those for normal display). If true, debug renderables will be included too.

Member Data Documentation

AnimationStateSet* Ogre::InstancedGeometry::mAnimationState

protected

This is the main animation state.

All "objects" in the batch will use an instance of this animation state

Definition at line 561 of file OgreInstancedGeometry.h.

SkeletonPtr Ogre::InstancedGeometry::mBaseSkeleton

protected

this is just a pointer to the base skeleton that will be used for each animated object in the batches This pointer has a value only during the creation of the InstancedGeometry

Definition at line 556 of file OgreInstancedGeometry.h.

Vector3 Ogre::InstancedGeometry::mBatchInstanceDimensions

protected

Definition at line 539 of file OgreInstancedGeometry.h.

BatchInstanceMap Ogre::InstancedGeometry::mBatchInstanceMap

protected

Map of BatchInstances.

Definition at line 573 of file OgreInstancedGeometry.h.

bool Ogre::InstancedGeometry::mBuilt

protected

Definition at line 535 of file OgreInstancedGeometry.h.

bool Ogre::InstancedGeometry::mCastShadows

protected

Definition at line 538 of file OgreInstancedGeometry.h.

Vector3 Ogre::InstancedGeometry::mHalfBatchInstanceDimensions

protected

Definition at line 540 of file OgreInstancedGeometry.h.

BatchInstance* Ogre::InstancedGeometry::mInstancedGeometryInstance

protected

Definition at line 552 of file OgreInstancedGeometry.h.

String Ogre::InstancedGeometry::mName

protected

Definition at line 534 of file OgreInstancedGeometry.h.

unsigned int Ogre::InstancedGeometry::mObjectCount

protected

number of objects in the batch

Definition at line 550 of file OgreInstancedGeometry.h.

OptimisedSubMeshGeometryList Ogre::InstancedGeometry::mOptimisedSubMeshGeometryList

protected

List of geometry which has been optimised for SubMesh use This is the primary storage used for cleaning up later.

Definition at line 564 of file OgreInstancedGeometry.h.

Vector3 Ogre::InstancedGeometry::mOrigin

protected

Definition at line 541 of file OgreInstancedGeometry.h.

SceneManager* Ogre::InstancedGeometry::mOwner

protected

Definition at line 533 of file OgreInstancedGeometry.h.

bool Ogre::InstancedGeometry::mProvideWorldInverses

protected

Flags to indicate whether the World Transform Inverse matrices are passed to the shaders.

Definition at line 544 of file OgreInstancedGeometry.h.

QueuedSubMeshList Ogre::InstancedGeometry::mQueuedSubMeshes

protected

Definition at line 551 of file OgreInstancedGeometry.h.

RenderOperationVector Ogre::InstancedGeometry::mRenderOps

protected

This vector stores all the renderOperation used in the batch.

See the type definition for more details.

Definition at line 577 of file OgreInstancedGeometry.h.

uint8 Ogre::InstancedGeometry::mRenderQueueID

protected

The render queue to use when rendering this object.

Definition at line 546 of file OgreInstancedGeometry.h.

bool Ogre::InstancedGeometry::mRenderQueueIDSet

protected

Flags whether the RenderQueue's default should be used.

Definition at line 548 of file OgreInstancedGeometry.h.

SkeletonInstance* Ogre::InstancedGeometry::mSkeletonInstance

protected

Definition at line 557 of file OgreInstancedGeometry.h.

Real Ogre::InstancedGeometry::mSquaredUpperDistance

protected

Definition at line 537 of file OgreInstancedGeometry.h.

SubMeshGeometryLookup Ogre::InstancedGeometry::mSubMeshGeometryLookup

protected

Cached links from SubMeshes to (potentially optimised) geometry This is not used for deletion since the lookup may reference original vertex data.

Definition at line 570 of file OgreInstancedGeometry.h.

Real Ogre::InstancedGeometry::mUpperDistance

protected

Definition at line 536 of file OgreInstancedGeometry.h.

bool Ogre::InstancedGeometry::mVisible

protected

Definition at line 542 of file OgreInstancedGeometry.h.

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

• OgreInstancedGeometry.h