Allows the rendering of a chain of connected billboards. More...

#include <OgreBillboardChain.h>

Inheritance diagram for Ogre::v1::BillboardChain:

Classes
class	Element
	Contains the data of an element of the BillboardChain. More...

Public Types
typedef vector< Element >::type	ElementList

enum	TexCoordDirection { TCD_U , TCD_V }
	The direction in which texture coordinates from elements of the chain are used. More...

Public Types inherited from Ogre::MovableObject
typedef FastArray< MovableObject * >	MovableObjectArray

Public Types inherited from Ogre::Renderable
typedef map< size_t, Vector4 >::type	CustomParameterMap

Public Member Functions
	BillboardChain (IdType id, ObjectMemoryManager objectMemoryManager, SceneManager manager, size_t maxElements=20, size_t numberOfChains=1, bool useTextureCoords=true, bool useColours=true, bool dynamic=true)
	Constructor (don't use directly, use factory) More...

	~BillboardChain () override
	Destructor. More...

void	_updateRenderQueue (RenderQueue , Camera camera, const Camera *lodCamera) override
	Internal method by which the movable object must add Renderable subclass instances to the rendering queue. More...

virtual void	addChainElement (size_t chainIndex, const Element &billboardChainElement)
	Add an element to the 'head' of a chain. More...

virtual void	clearAllChains ()
	Remove all elements from all chains (but leave the chains themselves intact). More...

virtual void	clearChain (size_t chainIndex)
	Remove all elements of a given chain (but leave the chain intact). More...

const AxisAlignedBox &	getBoundingBox () const

virtual const Element &	getChainElement (size_t chainIndex, size_t elementIndex) const
	Get the detail of a chain element. More...

virtual bool	getDynamic () const
	Gets whether or not the buffers created for this object are suitable for dynamic alteration. More...

const LightList &	getLights () const override
	Gets a list of lights, ordered relative to how close they are to this renderable. More...

virtual size_t	getMaxChainElements () const
	Get the maximum number of chain elements per chain. More...

const String &	getMovableType () const override
	Returns the type name of this object. More...

virtual size_t	getNumberOfChains () const
	Get the number of chain segments (this class can render multiple chains at once using the same material). More...

virtual size_t	getNumChainElements (size_t chainIndex) const
	Returns the number of chain elements. More...

virtual const Real *	getOtherTextureCoordRange () const
	Get the range of the texture coordinates generated across the width of the chain elements. More...

void	getRenderOperation (RenderOperation &, bool casterPass) override
	Gets the render operation required to send this object to the frame buffer. More...

Real	getSquaredViewDepth (const Camera *cam) const

virtual TexCoordDirection	getTextureCoordDirection ()
	Gets the direction in which texture coords specified on each element are deemed to run. More...

virtual bool	getUseTextureCoords () const
	Gets whether texture coordinate information should be included in the final buffers generated. More...

virtual bool	getUseVertexColours () const
	Gets whether vertex colour information should be included in the final buffers generated. More...

void	getWorldTransforms (Matrix4 *) const override
	Gets the world transform matrix / matrices for this renderable object. More...

virtual bool	preRender (SceneManager sm, RenderSystem rsys) override
	Called just prior to the Renderable being rendered. More...

virtual void	removeChainElement (size_t chainIndex)
	Remove an element from the 'tail' of a chain. More...

virtual void	setDynamic (bool dyn)
	Sets whether or not the buffers created for this object are suitable for dynamic alteration. More...

void	setFaceCamera (bool faceCamera, const Vector3 &normalVector=Vector3::UNIT_X)
	Sets whether the billboard should always be facing the camera or a custom direction set by each point element. More...

virtual void	setMaxChainElements (size_t maxElements)
	Set the maximum number of chain elements per chain. More...

virtual void	setNumberOfChains (size_t numChains)
	Set the number of chain segments (this class can render multiple chains at once using the same material). More...

virtual void	setOtherTextureCoordRange (Real start, Real end)
	Set the range of the texture coordinates generated across the width of the chain elements. More...

virtual void	setTextureCoordDirection (TexCoordDirection dir)
	Sets the direction in which texture coords specified on each element are deemed to run along the length of the chain. More...

virtual void	setUseTextureCoords (bool use)
	Sets whether texture coordinate information should be included in the final buffers generated. More...

virtual void	setUseVertexColours (bool use)
	Sets whether vertex colour information should be included in the final buffers generated. More...

virtual void	updateChainElement (size_t chainIndex, size_t elementIndex, const Element &billboardChainElement)
	Update the details of an existing chain element. More...

Public Member Functions inherited from Ogre::MovableObject
	MovableObject (IdType id, ObjectMemoryManager objectMemoryManager, SceneManager manager, uint8 renderQueueId)
	Constructor. More...

	MovableObject (ObjectData *objectDataPtrs)
	Don't use this constructor unless you know what you're doing. More...

virtual	~MovableObject ()
	Virtual destructor - read Scott Meyers if you don't know why this is needed. More...

LightList *	_getLightList ()
	Returns a pointer to the current list of lights for this object. More...

SceneManager *	_getManager () const
	Get the manager of this object, if any (internal use only) More...

ObjectData &	_getObjectData ()
	Returns a direct access to the ObjectData state. More...

const Matrix4 &	_getParentNodeFullTransform () const
	Returns the full transformation of the parent sceneNode or the attachingPoint node. More...

virtual void	_notifyAttached (Node *parent)
	Internal method called to notify the object that it has been attached to a node. More...

void	_notifyManager (SceneManager *man)
	Notify the object of it's manager (internal use only) More...

virtual void	_notifyParentNodeMemoryChanged ()

virtual void	_notifyStaticDirty () const
	Called by SceneManager when it is telling we're a static MovableObject being dirty Don't call this directly. More...

virtual void	_releaseManualHardwareResources ()
	Notifies the movable object that hardware resources were lost. More...

virtual void	_restoreManualHardwareResources ()
	Notifies the movable object that hardware resources should be restored. More...

void	addQueryFlags (uint32 flags)
	As setQueryFlags, except the flags passed as parameters are appended to the existing flags on this object. More...

void	addVisibilityFlags (uint32 flags)
	As setVisibilityFlags, except the flags passed as parameters are appended to the existing flags on this object. More...

void	detachFromParent ()
	Detaches an object from a parent SceneNode if attached. More...

RealAsUint	getCachedDistanceToCamera () const
	Returns the distance to camera as calculated in cullFrustum() More...

Real	getCachedDistanceToCameraAsReal () const
	Returns the distance to camera as calculated in cullFrustum() More...

bool	getCastShadows () const
	Returns whether shadow casting is enabled for this object. More...

unsigned char	getCurrentMeshLod () const

uint32	getLightMask () const
	Get a bitwise mask which will filter the lights affecting this object. More...

Listener *	getListener () const
	Gets the current listener for this object. More...

Aabb	getLocalAabb () const
	Retrieves the local axis-aligned bounding box for this object. More...

float	getLocalRadius () const
	See getLocalAabb and getWorldRadius. More...

const String &	getName () const
	Returns the name of this object. More...

Node *	getParentNode () const
	Returns the node to which this object is attached. More...

SceneNode *	getParentSceneNode () const

uint32	getQueryFlags () const
	Returns the query flags relevant for this object. More...

Real	getRenderingDistance () const
	Gets the distance at which batches are no longer rendered. More...

Real	getRenderingMinPixelSize () const
	Returns the minimum pixel size an object needs to be in both screen axes in order to be rendered. More...

uint8	getRenderQueueGroup () const
	Gets the queue group for this entity, see setRenderQueueGroup for full details. More...

Real	getShadowRenderingDistance () const
	Gets the distance at which batches are no longer casting shadows. More...

SkeletonInstance *	getSkeletonInstance () const

UserObjectBindings &	getUserObjectBindings ()
	Return an instance of user objects binding associated with this class. More...

const UserObjectBindings &	getUserObjectBindings () const
	Return an instance of user objects binding associated with this class. More...

uint32	getVisibilityFlags () const
	Returns the visibility flags relevant for this object. More...

bool	getVisible () const
	Gets this object whether to be visible or not, if it has a renderable component. More...

Aabb	getWorldAabb () const
	Gets the axis aligned box in world space. More...

Aabb	getWorldAabbUpdated ()
	Gets the axis aligned box in world space. More...

float	getWorldRadius () const
	Gets the bounding Radius scaled by max( scale.x, scale.y, scale.z ). More...

float	getWorldRadiusUpdated ()
	Gets the bounding Radius scaled by max( scale.x, scale.y, scale.z ). More...

virtual void	instanceBatchCullFrustumThreaded (const Frustum frustum, const Camera lodCamera, uint32 combinedVisibilityFlags)

bool	isAttached () const
	Returns true if this object is attached to a Node. More...

bool	isStatic () const
	Checks whether this MovableObject is static. More...

bool	isVisible () const
	Returns whether or not this object is supposed to be visible or not. More...

const LightList &	queryLights () const
	Gets a list of lights, ordered relative to how close they are to this movable object. More...

void	removeQueryFlags (uint32 flags)
	As setQueryFlags, except the flags passed as parameters are removed from the existing flags on this object. More...

void	removeVisibilityFlags (uint32 flags)
	As setVisibilityFlags, except the flags passed as parameters are removed from the existing flags on this object. More...

void	resetMeshLod ()
	Sets mCurrentMeshLod to 0. More...

void	setCastShadows (bool enabled)
	Sets whether or not this object will cast shadows. More...

void	setLightMask (uint32 lightMask)
	Set a bitwise mask which will filter the lights affecting this object. More...

void	setListener (Listener *listener)
	Sets a listener for this object. More...

void	setLocalAabb (const Aabb box)
	Sets the local axis-aligned bounding box for this object. More...

void	setName (const String &name)
	Sets a custom name for this node. More...

void	setQueryFlags (uint32 flags)
	Sets the query flags for this object. More...

void	setRenderingDistance (Real dist)
	Sets the distance at which the object is no longer rendered. More...

void	setRenderingMinPixelSize (Real pixelSize)
	Sets the minimum pixel size an object needs to be in both screen axes in order to be rendered. More...

virtual void	setRenderQueueGroup (uint8 queueID)
	Sets the render queue group this entity will be rendered through. More...

void	setShadowRenderingDistance (Real dist)
	Sets the distance at which the object is no longer casting shadows. More...

bool	setStatic (bool bStatic)
	Turns this Node into static or dynamic. More...

void	setVisibilityFlags (uint32 flags)
	Sets the visibility flags for this object. More...

void	setVisible (bool visible)
	Tells this object whether to be visible or not, if it has a renderable component. More...

Public Member Functions inherited from Ogre::AnimableObject
	AnimableObject ()

virtual	~AnimableObject ()

virtual AnimableValuePtr	createAnimableValue (const String &valueName)
	Create a reference-counted AnimableValuePtr for the named value. More...

const StringVector &	getAnimableValueNames () const
	Gets a list of animable value names for this object. More...

Public Member Functions inherited from Ogre::IdObject
	IdObject (IdType id)
	We don't call generateNewId() here, to prevent objects in the stack (i.e. More...

IdType	getId () const
	Get the unique id of this object. More...

bool	operator() (const IdObject &left, const IdObject &right)

bool	operator() (const IdObject left, const IdObject right)

Public Member Functions inherited from Ogre::Renderable
	Renderable ()

virtual	~Renderable ()
	Virtual destructor needed as class has virtual methods. More...

virtual void	_setHlmsHashes (uint32 hash, uint32 casterHash)
	Manually sets the hlms hashes. Don't call this directly. More...

virtual void	_setNullDatablock ()
	Sets the datablock to a null pointer. More...

virtual void	_updateCustomGpuParameter (const GpuProgramParameters_AutoConstantEntry &constantEntry, GpuProgramParameters *params) const
	Update a custom GpuProgramParameters constant which is derived from information only this Renderable knows. More...

void	addPoseWeight (size_t index, float w)

virtual bool	getCastsShadows () const
	Method which reports whether this renderable would normally cast a shadow. More...

uint8	getCurrentMaterialLod () const

const Vector4 &	getCustomParameter (size_t index) const
	Gets the custom value associated with this Renderable at the given index. More...

const CustomParameterMap &	getCustomParameters () const

HlmsDatablock *	getDatablock () const

const String &	getDatablockOrMaterialName () const

uint32	getHlmsCasterHash () const

uint32	getHlmsHash () const

MaterialPtr	getMaterial () const
	Retrieves the material this renderable object uses. More...

unsigned short	getNumPoses () const

virtual unsigned short	getNumWorldTransforms () const
	Returns the number of world transform matrices this renderable requires. More...

virtual bool	getPolygonModeOverrideable () const
	Gets whether this renderable's chosen detail level can be overridden (downgraded) by the camera setting. More...

bool	getPoseHalfPrecision () const

bool	getPoseNormals () const

TexBufferPacked *	getPoseTexBuffer () const

float	getPoseWeight (size_t index) const

float *	getPoseWeights () const

uint8	getRenderQueueSubGroup () const

bool	getUseIdentityProjection () const
	Returns whether or not to use an 'identity' projection. More...

bool	getUseIdentityView () const
	Returns whether or not to use an 'identity' view. More...

virtual bool	getUseIdentityViewProjMatrixIsDynamic () const
	Returns whether the Hlms implementation should evaluate getUseIdentityProjection per object at runtime, or if it can assume the Renderable will remain with the same setting until the datablock is flushed (performance optimization) More...

virtual bool	getUseIdentityWorldMatrix () const
	Returns whether the world matrix is an identity matrix. More...

virtual OGRE_DEPRECATED const Any &	getUserAny () const

UserObjectBindings &	getUserObjectBindings ()
	Return an instance of user objects binding associated with this class. More...

const UserObjectBindings &	getUserObjectBindings () const
	Return an instance of user objects binding associated with this class. More...

const VertexArrayObjectArray &	getVaos (VertexPass vertexPass) const

bool	hasCustomParameter (size_t index) const
	Checks whether a custom value is associated with this Renderable at the given index. More...

bool	hasSkeletonAnimation () const

virtual void	postRender (SceneManager sm, RenderSystem rsys)
	Called immediately after the Renderable has been rendered. More...

void	removeCustomParameter (size_t index)
	Removes a custom value which is associated with this Renderable at the given index. More...

void	resetMaterialLod ()
	Sets mCurrentMaterialLod to 0. More...

void	setCustomParameter (size_t index, const Vector4 &value)
	Sets a custom parameter for this Renderable, which may be used to drive calculations for this specific Renderable, like GPU program parameters. More...

virtual void	setDatablock (HlmsDatablock *datablock)
	Assigns a datablock (i.e. HLMS Material) to this renderable. More...

void	setDatablock (IdString datablockName)
	Assigns a datablock (i.e. More...

void	setDatablockOrMaterialName (String materialName, String groupName)
	First tries to see if an HLMS datablock exist with the given name, if not, tries to search among low level materials. More...

virtual void	setMaterial (const MaterialPtr &material)
	Sets the given material. Overrides HLMS materials. More...

void	setMaterialName (const String &name, const String &groupName)
	Sets the name of the Material to be used. Prefer using HLMS. More...

virtual void	setPolygonModeOverrideable (bool override)
	Sets whether this renderable's chosen detail level can be overridden (downgraded) by the camera setting. More...

void	setPoseWeight (size_t index, float w)

void	setRenderQueueSubGroup (uint8 subGroup)
	Sets the render queue sub group. More...

void	setUseIdentityProjection (bool useIdentityProjection)
	Sets whether or not to use an 'identity' projection. More...

void	setUseIdentityView (bool useIdentityView)
	Sets whether or not to use an 'identity' view. More...

virtual OGRE_DEPRECATED void	setUserAny (const Any &anything)

Additional Inherited Members
Static Public Member Functions inherited from Ogre::MovableObject
static void	buildLightList (const size_t numNodes, ObjectData t, const LightListInfo &globalLightList)

static void	calculateCastersBox (const size_t numNodes, ObjectData t, uint32 sceneVisibilityFlags, AxisAlignedBox *outBox)

static void	cullFrustum (const size_t numNodes, ObjectData t, const Camera *frustum, MovableObjectArray &outCulledObjects, const CullFrustumPreparedData &pd)

static void	cullFrustumPrepare (const Camera frustum, uint32 sceneVisibilityFlags, const Camera lodCamera, CullFrustumPreparedData &pd)

static void	cullLights (const size_t numNodes, ObjectData t, uint32 sceneLightMask, LightListInfo &outGlobalLightList, const FrustumVec &frustums, const FrustumVec &cubemapFrustums)
	See SceneManager::cullLights & see MovableObject::cullFrustum. More...

static uint32	getDefaultLightMask ()
	Get the default light mask for all future MovableObject instances. More...

static uint32	getDefaultQueryFlags ()
	Get the default query flags for all future MovableObject instances. More...

static uint32	getDefaultVisibilityFlags ()
	Get the default visibility flags for all future MovableObject instances. More...

static void	setDefaultLightMask (uint32 mask)
	Set the default light mask for all future MovableObject instances. More...

static void	setDefaultQueryFlags (uint32 flags)
	Set the default query flags for all future MovableObject instances. More...

static void	setDefaultVisibilityFlags (uint32 flags)
	Set the default visibility flags for all future MovableObject instances. More...

static void	updateAllBounds (const size_t numNodes, ObjectData t)

Static Public Member Functions inherited from Ogre::Renderable
static uint8	getDefaultRenderQueueSubGroup ()

static void	setDefaultRenderQueueSubGroup (uint8 subGroup)
	Sets the default render queue sub group for all future Renderable instances. More...

Public Attributes inherited from Ogre::MovableObject
size_t	mGlobalIndex
	Index in the vector holding this MO reference (could be our parent node, or a global array tracking all movable objecst to avoid memory leaks). More...

size_t	mParentIndex
	Index in the vector holding this MO reference (could be our parent node, or a global array tracking all movable objecst to avoid memory leaks). More...

RenderableArray	mRenderables

Public Attributes inherited from Ogre::Renderable
uint8	mCustomParameter

uint32	mHlmsGlobalIndex
	Index in the vector holding this Rendrable reference in the HLMS datablock. More...

bool	mRenderableVisible
	Control visibility at Renderable (e.g. More...

Static Public Attributes inherited from Ogre::MovableObject
static const FastArray< Real >	c_DefaultLodMesh

Detailed Description

Allows the rendering of a chain of connected billboards.

Remarks: A billboard chain operates much like a traditional billboard, i.e. its segments always face the camera; the difference being that instead of a set of disconnected quads, the elements in this class are connected together in a chain which must always stay in a continuous strip. This kind of effect is useful for creating effects such as trails, beams, lightning effects, etc.

: A single instance of this class can actually render multiple separate chain segments in a single render operation, provided they all use the same material. To clarify the terminology: a 'segment' is a separate sub-part of the chain with its own start and end (called the 'head' and the 'tail'). An 'element' is a single position / colour / texcoord entry in a segment. You can add items to the head of a chain, and remove them from the tail, very efficiently. Each segment has a max size, and if adding an element to the segment would exceed this size, the tail element is automatically removed and re-used as the new item on the head.

: This class has no auto-updating features to do things like alter the colour of the elements or to automatically add / remove elements over time - you have to do all this yourself as a user of the class. Subclasses can however be used to provide this kind of behaviour automatically.

See also: RibbonTrail

Member Typedef Documentation

◆ ElementList

typedef vector<Element>::type Ogre::v1::BillboardChain::ElementList

Member Enumeration Documentation

◆ TexCoordDirection

enum Ogre::v1::BillboardChain::TexCoordDirection

The direction in which texture coordinates from elements of the chain are used.

Enumerator
TCD_U	Tex coord in elements is treated as the 'u' texture coordinate.
TCD_V	Tex coord in elements is treated as the 'v' texture coordinate.

Constructor & Destructor Documentation

◆ BillboardChain()

Ogre::v1::BillboardChain::BillboardChain	(	IdType	id,
		ObjectMemoryManager *	objectMemoryManager,
		SceneManager *	manager,
		size_t	maxElements = `20`,
		size_t	numberOfChains = `1`,
		bool	useTextureCoords = `true`,
		bool	useColours = `true`,
		bool	dynamic = `true`
	)

Constructor (don't use directly, use factory)

Parameters

name	The name to give this object
maxElements	The maximum number of elements per chain
numberOfChains	The number of separate chain segments contained in this object
useTextureCoords	If true, use texture coordinates from the chain elements
useColours	If true, use vertex colours from the chain elements
dynamic	If true, buffers are created with the intention of being updated

◆ ~BillboardChain()

Ogre::v1::BillboardChain::~BillboardChain ( )

override

Destructor.

Member Function Documentation

◆ _updateRenderQueue()

void Ogre::v1::BillboardChain::_updateRenderQueue	(	RenderQueue *	queue,
		Camera *	camera,
		const Camera *	lodCamera
	)

overridevirtual

Internal method by which the movable object must add Renderable subclass instances to the rendering queue.

Remarks: The engine will call this method when this object is to be rendered. The object must then create one or more Renderable subclass instances which it places on the passed in Queue for rendering.

Reimplemented from Ogre::MovableObject.

◆ addChainElement()

virtual void Ogre::v1::BillboardChain::addChainElement	(	size_t	chainIndex,
		const Element &	billboardChainElement
	)

virtual

Add an element to the 'head' of a chain.

Remarks: If this causes the number of elements to exceed the maximum elements per chain, the last element in the chain (the 'tail') will be removed to allow the additional element to be added.

Parameters

chainIndex	The index of the chain
billboardChainElement	The details to add

◆ clearAllChains()

virtual void Ogre::v1::BillboardChain::clearAllChains ( )

virtual

Remove all elements from all chains (but leave the chains themselves intact).

◆ clearChain()

virtual void Ogre::v1::BillboardChain::clearChain ( size_t chainIndex )

virtual

Remove all elements of a given chain (but leave the chain intact).

Reimplemented in Ogre::v1::RibbonTrail.

◆ getBoundingBox()

const AxisAlignedBox& Ogre::v1::BillboardChain::getBoundingBox ( ) const

◆ getChainElement()

virtual const Element& Ogre::v1::BillboardChain::getChainElement	(	size_t	chainIndex,
		size_t	elementIndex
	)		const

virtual

Get the detail of a chain element.

Parameters

chainIndex	The index of the chain
elementIndex	The element index within the chain, measured from the 'head' of the chain

◆ getDynamic()

virtual bool Ogre::v1::BillboardChain::getDynamic ( ) const

inlinevirtual

Gets whether or not the buffers created for this object are suitable for dynamic alteration.

◆ getLights()

const LightList& Ogre::v1::BillboardChain::getLights ( ) const

overridevirtual

Gets a list of lights, ordered relative to how close they are to this renderable.

Remarks: Directional lights, which have no position, will always be first on this list.

Implements Ogre::Renderable.

◆ getMaxChainElements()

virtual size_t Ogre::v1::BillboardChain::getMaxChainElements ( ) const

inlinevirtual

Get the maximum number of chain elements per chain.

◆ getMovableType()

const String& Ogre::v1::BillboardChain::getMovableType ( ) const

overridevirtual

Returns the type name of this object.

Implements Ogre::MovableObject.

Reimplemented in Ogre::v1::RibbonTrail.

◆ getNumberOfChains()

virtual size_t Ogre::v1::BillboardChain::getNumberOfChains ( ) const

inlinevirtual

Get the number of chain segments (this class can render multiple chains at once using the same material).

◆ getNumChainElements()

virtual size_t Ogre::v1::BillboardChain::getNumChainElements ( size_t chainIndex ) const

virtual

Returns the number of chain elements.

◆ getOtherTextureCoordRange()

virtual const Real* Ogre::v1::BillboardChain::getOtherTextureCoordRange ( ) const

inlinevirtual

Get the range of the texture coordinates generated across the width of the chain elements.

◆ getRenderOperation()

void Ogre::v1::BillboardChain::getRenderOperation	(	RenderOperation &	op,
		bool	casterPass
	)

overridevirtual

Gets the render operation required to send this object to the frame buffer.

Implements Ogre::Renderable.

◆ getSquaredViewDepth()

Real Ogre::v1::BillboardChain::getSquaredViewDepth ( const Camera * cam ) const

◆ getTextureCoordDirection()

virtual TexCoordDirection Ogre::v1::BillboardChain::getTextureCoordDirection ( )

inlinevirtual

Gets the direction in which texture coords specified on each element are deemed to run.

◆ getUseTextureCoords()

virtual bool Ogre::v1::BillboardChain::getUseTextureCoords ( ) const

inlinevirtual

Gets whether texture coordinate information should be included in the final buffers generated.

◆ getUseVertexColours()

virtual bool Ogre::v1::BillboardChain::getUseVertexColours ( ) const

inlinevirtual

Gets whether vertex colour information should be included in the final buffers generated.

◆ getWorldTransforms()

void Ogre::v1::BillboardChain::getWorldTransforms ( Matrix4 * xform ) const

overridevirtual

Gets the world transform matrix / matrices for this renderable object.

Remarks: If the object has any derived transforms, these are expected to be up to date as long as all the SceneNode structures have been updated before this is called.

: This method will populate transform with 1 matrix if it does not use vertex blending. If it does use vertex blending it will fill the passed in pointer with an array of matrices, the length being the value returned from getNumWorldTransforms.

Note: Internal Ogre never supports non-affine matrix for world transform matrix/matrices, the behavior is undefined if returns non-affine matrix here.

See also: Matrix4::isAffine.

Implements Ogre::Renderable.

◆ preRender()

virtual bool Ogre::v1::BillboardChain::preRender	(	SceneManager *	sm,
		RenderSystem *	rsys
	)

overridevirtual

Called just prior to the Renderable being rendered.

Remarks: OGRE is a queued renderer, so the actual render commands are executed at a later time than the point at which an object is discovered to be visible. This allows ordering & grouping of renders without the discovery process having to be aware of it. It also means OGRE uses declarative render information rather than immediate mode rendering - this is very useful in that certain effects and processes can automatically be applied to a wide range of scenes, but the downside is that special cases are more difficult to handle, because there is not the declared state to cope with it.

: This method allows a Renderable to do something special at the actual point of rendering if it wishes to. When this method is called, all the material render state as declared by this Renderable has already been set, all that is left to do is to bind the buffers and perform the render. The Renderable may modify render state itself if it wants to (and restore it in the postRender call) before the automated render happens, or by returning 'false' from this method can actually suppress the automatic render and perform one of its own.

Returns: true if the automatic render should proceed, false to skip it on the assumption that the Renderable has done it manually.

Reimplemented from Ogre::Renderable.

◆ removeChainElement()

virtual void Ogre::v1::BillboardChain::removeChainElement ( size_t chainIndex )

virtual

Remove an element from the 'tail' of a chain.

Parameters

chainIndex The index of the chain

◆ setDynamic()

virtual void Ogre::v1::BillboardChain::setDynamic ( bool dyn )

virtual

Sets whether or not the buffers created for this object are suitable for dynamic alteration.

◆ setFaceCamera()

void Ogre::v1::BillboardChain::setFaceCamera	(	bool	faceCamera,
		const Vector3 &	normalVector = `Vector3::UNIT_X`
	)

Sets whether the billboard should always be facing the camera or a custom direction set by each point element.

Remarks: Billboards facing the camera are useful for smoke trails, light beams, etc by simulating a cylinder. However, because of this property, wide trails can cause several artefacts unless the head is properly covered. Therefore, non-camera-facing billboards are much more convenient for leaving big trails of movement from thin objects, for example a sword swing as seen in many fighting games.

Parameters

faceCamera	True to be always facing the camera (Default value: True)
normalVector	Only used when faceCamera == false. Must be a non-zero vector. This vector is the "point of reference" for each point orientation. For example, if normalVector is Vector3::UNIT_Z, and the point's orientation is an identity matrix, the segment corresponding to that point will be facing towards UNIT_Z This vector is internally normalized.

◆ setMaxChainElements()

virtual void Ogre::v1::BillboardChain::setMaxChainElements ( size_t maxElements )

virtual

Set the maximum number of chain elements per chain.

Reimplemented in Ogre::v1::RibbonTrail.

◆ setNumberOfChains()

virtual void Ogre::v1::BillboardChain::setNumberOfChains ( size_t numChains )

virtual

Set the number of chain segments (this class can render multiple chains at once using the same material).

Reimplemented in Ogre::v1::RibbonTrail.

◆ setOtherTextureCoordRange()

virtual void Ogre::v1::BillboardChain::setOtherTextureCoordRange	(	Real	start,
		Real	end
	)

virtual

Set the range of the texture coordinates generated across the width of the chain elements.

Parameters

start	Start coordinate, default 0.0
end	End coordinate, default 1.0

◆ setTextureCoordDirection()

virtual void Ogre::v1::BillboardChain::setTextureCoordDirection ( TexCoordDirection dir )

virtual

Sets the direction in which texture coords specified on each element are deemed to run along the length of the chain.

Parameters

dir	The direction, default is TCD_U.

◆ setUseTextureCoords()

virtual void Ogre::v1::BillboardChain::setUseTextureCoords ( bool use )

virtual

Sets whether texture coordinate information should be included in the final buffers generated.

Note: You must use either texture coordinates or vertex colour since the vertices have no normals and without one of these there is no source of colour for the vertices.

◆ setUseVertexColours()

virtual void Ogre::v1::BillboardChain::setUseVertexColours ( bool use )

virtual

Sets whether vertex colour information should be included in the final buffers generated.

Note: You must use either texture coordinates or vertex colour since the vertices have no normals and without one of these there is no source of colour for the vertices.

◆ updateChainElement()

virtual void Ogre::v1::BillboardChain::updateChainElement	(	size_t	chainIndex,
		size_t	elementIndex,
		const Element &	billboardChainElement
	)

virtual

Update the details of an existing chain element.

Parameters

chainIndex	The index of the chain
elementIndex	The element index within the chain, measured from the 'head' of the chain
billboardChainElement	The details to set

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

OgreBillboardChain.h

Classes

Public Types

Public Member Functions

Additional Inherited Members

Detailed Description

Member Typedef Documentation

◆ ElementList

Member Enumeration Documentation

◆ TexCoordDirection

Constructor & Destructor Documentation

◆ BillboardChain()

◆ ~BillboardChain()

Member Function Documentation

◆ _updateRenderQueue()

◆ addChainElement()

◆ clearAllChains()

◆ clearChain()

◆ getBoundingBox()

◆ getChainElement()

◆ getDynamic()

◆ getLights()

◆ getMaxChainElements()

◆ getMovableType()

◆ getNumberOfChains()

◆ getNumChainElements()

◆ getOtherTextureCoordRange()

◆ getRenderOperation()

◆ getSquaredViewDepth()

◆ getTextureCoordDirection()

◆ getUseTextureCoords()

◆ getUseVertexColours()

◆ getWorldTransforms()

◆ preRender()

◆ removeChainElement()

◆ setDynamic()

◆ setFaceCamera()

◆ setMaxChainElements()

◆ setNumberOfChains()

◆ setOtherTextureCoordRange()

◆ setTextureCoordDirection()

◆ setUseTextureCoords()

◆ setUseVertexColours()

◆ updateChainElement()