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

#include <OgreBillboardChain.h>

Inheritance diagram for Ogre::BillboardChain:

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

Public Types
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::ShadowCaster
typedef Ogre::ShadowRenderableList	ShadowRenderableList

typedef VectorIterator< ShadowRenderableList >	ShadowRenderableListIterator

Public Types inherited from Ogre::Renderable
enum	{ DEFAULT_PRIORITY = 100 }

Public Member Functions
	BillboardChain (const String &name, size_t maxElements=20, size_t numberOfChains=1, bool useTextureCoords=true, bool useColours=true, bool dynamic=true)
	Constructor (don't use directly, use factory)

	~BillboardChain ()

void	_updateRenderQueue (RenderQueue *) override
	Internal method by which the movable object must add Renderable subclass instances to the rendering queue.

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

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

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

bool	getAutoUpdate (void) const
	Return the auto update state.

const AxisAlignedBox &	getBoundingBox (void) const override
	Retrieves the local axis-aligned bounding box for this object.

Real	getBoundingRadius (void) const override
	Retrieves the radius of the origin-centered bounding sphere for this object.

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

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

const MaterialPtr &	getMaterial (void) const override
	Retrieves a weak reference to the material this renderable object uses.

virtual const String &	getMaterialName (void) const
	Get the material name in use.

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

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

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

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

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

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

Real	getSquaredViewDepth (const Camera *cam) const override
	Returns the squared distance between the camera and this renderable.

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

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

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

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

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

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

void	setAutoUpdate (bool autoUpdate)
	Set the auto update state.

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.

virtual void	setMaterialName (const String &name, const String &groupName=ResourceGroupManager::AUTODETECT_RESOURCE_GROUP_NAME)
	Set the material name to use for rendering.

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

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

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

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.

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

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

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

void	visitRenderables (Renderable::Visitor *visitor, bool debugRenderables=false) override
	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.

Public Member Functions inherited from Ogre::MovableObject
	MovableObject ()
	Constructor.

	MovableObject (const String &name)
	Named constructor.

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

MovableObjectFactory *	_getCreator (void) const
	Get the creator of this object, if any (internal use only)

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

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

virtual const Affine3 &	_getParentNodeFullTransform (void) const
	Return the full transformation of the parent sceneNode or the attachingPoint node.

virtual void	_notifyAttached (Node *parent, bool isTagPoint=false)
	Internal method called to notify the object that it has been attached to a node.

virtual void	_notifyCreator (MovableObjectFactory *fact)
	Notify the object of it's creator (internal use only)

virtual void	_notifyCurrentCamera (Camera *cam)
	Internal method to notify the object of the camera to be used for the next rendering operation.

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

virtual void	_notifyMoved (void)
	Internal method called to notify the object that it has been moved.

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

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

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

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

void	detachFromParent (void)
	Detaches an object from a parent SceneNode or TagPoint, if attached.

Real	getBoundingRadiusScaled () const
	as getBoundingRadius, but with scaling applied

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

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

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

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

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

SceneNode *	getParentSceneNode (void) const
	Returns the scene node to which this object is attached.

Real	getPointExtrusionDistance (const Light *l) const override
	Get the distance to extrude for a point/spot light.

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

bool	getReceivesShadows ()
	Returns whether the Material of any Renderable that this MovableObject will add to the render queue will receive shadows.

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

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

uint8	getRenderQueueGroup (void) const
	Gets the queue group for this entity.

virtual uint32	getTypeFlags (void) const
	Get the 'type flags' for this MovableObject.

const Any &	getUserAny (void) const

UserObjectBindings &	getUserObjectBindings ()
	Class that provides convenient interface to establish a linkage between custom user application objects and Ogre core classes.

const UserObjectBindings &	getUserObjectBindings () const
	This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.

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

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

const AxisAlignedBox &	getWorldBoundingBox (bool derive=false) const override
	Retrieves the axis-aligned bounding box for this object in world coordinates.

virtual const Sphere &	getWorldBoundingSphere (bool derive=false) const
	Retrieves the worldspace bounding sphere for this object.

bool	isAttached (void) const
	Returns true if this object is attached to a SceneNode or TagPoint.

bool	isDebugDisplayEnabled (void) const
	Gets whether debug display of this object is enabled.

virtual bool	isInScene (void) const
	Returns true if this object is attached to a SceneNode or TagPoint, and this SceneNode / TagPoint is currently in an active part of the scene graph.

bool	isParentTagPoint () const
	Gets whether the parent node is a TagPoint (or a SceneNode)

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

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

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

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

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

void	setDebugDisplayEnabled (bool enabled)
	Sets whether or not the debug display of this object is enabled.

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

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

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

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

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

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

virtual void	setRenderQueueGroupAndPriority (uint8 queueID, ushort priority)
	Sets the render queue group and group priority this entity will be rendered through.

void	setUserAny (const Any &anything)

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

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

Public Member Functions inherited from Ogre::ShadowCaster
virtual	~ShadowCaster ()

const AxisAlignedBox &	getDarkCapBounds (const Light &light, Real dirLightExtrusionDist) const
	Gets the world space bounding box of the dark cap, as extruded using the light provided.

virtual EdgeData *	getEdgeList (void)
	Returns details of the edges which might be used to determine a silhouette.

const AxisAlignedBox &	getLightCapBounds (void) const
	Gets the world space bounding box of the light cap.

virtual const ShadowRenderableList &	getShadowVolumeRenderableList (const Light *light, const HardwareIndexBufferPtr &indexBuffer, size_t &indexBufferUsedSize, float extrusionDistance, int flags=0)
	Gets an list of the renderables required to render the shadow volume.

bool	hasEdgeList ()
	Returns whether the object has a valid edge list.

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.

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

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

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

uint16	_getMaterialLodIndex () const

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

const Vector4f &	getCustomParameter (size_t index) const
	Gets the custom value associated with this Renderable at the given index.

virtual uint16	getNumWorldTransforms (void) const
	Returns the number of world transform matrices this renderable requires.

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

virtual Technique *	getTechnique (void) const
	Retrieves a pointer to the Material Technique this renderable object uses.

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

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

const Any &	getUserAny (void) const

UserObjectBindings &	getUserObjectBindings ()
	Class that provides convenient interface to establish a linkage between custom user application objects and Ogre core classes.

const UserObjectBindings &	getUserObjectBindings () const
	This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.

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

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

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

void	setCustomParameter (size_t index, const Vector4f &value)
	Sets a custom parameter for this Renderable, which may be used to drive calculations for this specific Renderable, like GPU program parameters.

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

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

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

void	setUserAny (const Any &anything)

Additional Inherited Members
Static Public Member Functions inherited from Ogre::MovableObject
static uint32	getDefaultQueryFlags ()
	Get the default query flags for all future MovableObject instances.

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

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

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

Static Public Member Functions inherited from Ogre::ShadowCaster
static void	clearShadowRenderableList (ShadowRenderableList &shadowRenderables)
	Common implementation of releasing shadow renderables.

static void	extrudeVertices (const HardwareVertexBufferSharedPtr &vertexBuffer, size_t originalVertexCount, const Vector4 &lightPos, Real extrudeDist)
	Utility method for extruding vertices based on a light.

Detailed Description

Allows the rendering of a chain of connected billboards.

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 Enumeration Documentation

◆ TexCoordDirection

enum Ogre::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::BillboardChain::BillboardChain	(	const String &	name,
		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::BillboardChain::~BillboardChain ( )

Member Function Documentation

◆ setMaxChainElements()

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

virtual

Set the maximum number of chain elements per chain.

Reimplemented in Ogre::RibbonTrail.

◆ getMaxChainElements()

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

inlinevirtual

Get the maximum number of chain elements per chain.

◆ setNumberOfChains()

virtual void Ogre::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::RibbonTrail.

◆ getNumberOfChains()

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

inlinevirtual

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

◆ setUseTextureCoords()

virtual void Ogre::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.

◆ getUseTextureCoords()

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

inlinevirtual

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

◆ setTextureCoordDirection()

virtual void Ogre::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.

◆ getTextureCoordDirection()

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

inlinevirtual

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

◆ setOtherTextureCoordRange()

virtual void Ogre::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

◆ getOtherTextureCoordRange()

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

inlinevirtual

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

◆ setUseVertexColours()

virtual void Ogre::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.

◆ getUseVertexColours()

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

inlinevirtual

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

◆ setAutoUpdate()

void Ogre::BillboardChain::setAutoUpdate ( bool autoUpdate )

Set the auto update state.

This methods controls the updating policy of the vertex buffer. By default auto update is true so the vertex buffer is being update every time this billboard set is about to be rendered. This behavior best fit when the billboards of this set changes frequently. When using static or semi-static billboards, it is recommended to set auto update to false. In that case one should call notifyBillboardDataChanged method to reflect changes made to the billboards data.

◆ getAutoUpdate()

bool Ogre::BillboardChain::getAutoUpdate ( void ) const

inline

Return the auto update state.

◆ addChainElement()

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

virtual

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

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

◆ removeChainElement()

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

virtual

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

Parameters

chainIndex The index of the chain

◆ updateChainElement()

virtual void Ogre::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

◆ getChainElement()

virtual const Element & Ogre::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

◆ getNumChainElements()

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

virtual

Returns the number of chain elements.

◆ clearChain()

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

virtual

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

Reimplemented in Ogre::RibbonTrail.

◆ clearAllChains()

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

virtual

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

◆ setFaceCamera()

void Ogre::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.

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.

◆ getMaterialName()

virtual const String & Ogre::BillboardChain::getMaterialName ( void ) const

inlinevirtual

Get the material name in use.

◆ setMaterialName()

virtual void Ogre::BillboardChain::setMaterialName	(	const String &	name,
		const String &	groupName = `ResourceGroupManager::AUTODETECT_RESOURCE_GROUP_NAME`
	)

virtual

Set the material name to use for rendering.

◆ getSquaredViewDepth()

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

overridevirtual

Returns the squared distance between the camera and this renderable.

Used to sort transparent objects. Squared distance is used to avoid having to perform a square root on the result.

Implements Ogre::Renderable.

◆ getBoundingRadius()

Real Ogre::BillboardChain::getBoundingRadius ( void ) const

overridevirtual

Retrieves the radius of the origin-centered bounding sphere for this object.

Implements Ogre::MovableObject.

◆ getBoundingBox()

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

overridevirtual

Retrieves the local axis-aligned bounding box for this object.

This bounding box is in local coordinates.

Implements Ogre::MovableObject.

◆ getMaterial()

const MaterialPtr & Ogre::BillboardChain::getMaterial ( void ) const

overridevirtual

Retrieves a weak reference to the material this renderable object uses.

Note that the Renderable also has the option to override the getTechnique method to specify a particular Technique to use instead of the best one available.

Implements Ogre::Renderable.

◆ getMovableType()

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

overridevirtual

Returns the type name of this object.

Implements Ogre::MovableObject.

Reimplemented in Ogre::RibbonTrail.

◆ _updateRenderQueue()

void Ogre::BillboardChain::_updateRenderQueue ( RenderQueue * queue )

overridevirtual

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

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.

Implements Ogre::MovableObject.

◆ getRenderOperation()

void Ogre::BillboardChain::getRenderOperation ( RenderOperation & op )

overridevirtual

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

Implements Ogre::Renderable.

◆ preRender()

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

overridevirtual

Called just prior to the Renderable being rendered.

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.

◆ getWorldTransforms()

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

overridevirtual

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

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.

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

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

Note: If MeshManager::getBonesUseObjectSpace() is true, the first matrix must contain the world transform of the object, and the rest of the matrices must contain the bone transforms in object space.

Implements Ogre::Renderable.

◆ getLights()

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

overridevirtual

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

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

Implements Ogre::Renderable.

◆ visitRenderables()

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

overridevirtual

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.

Implements Ogre::MovableObject.

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 Enumeration Documentation

◆ TexCoordDirection

Constructor & Destructor Documentation

◆ BillboardChain()

◆ ~BillboardChain()

Member Function Documentation

◆ setMaxChainElements()

◆ getMaxChainElements()

◆ setNumberOfChains()

◆ getNumberOfChains()

◆ setUseTextureCoords()

◆ getUseTextureCoords()

◆ setTextureCoordDirection()

◆ getTextureCoordDirection()

◆ setOtherTextureCoordRange()

◆ getOtherTextureCoordRange()

◆ setUseVertexColours()

◆ getUseVertexColours()

◆ setAutoUpdate()

◆ getAutoUpdate()

◆ addChainElement()

◆ removeChainElement()

◆ updateChainElement()

◆ getChainElement()

◆ getNumChainElements()

◆ clearChain()

◆ clearAllChains()

◆ setFaceCamera()

◆ getMaterialName()

◆ setMaterialName()

◆ getSquaredViewDepth()

◆ getBoundingRadius()

◆ getBoundingBox()

◆ getMaterial()

◆ getMovableType()

◆ _updateRenderQueue()

◆ getRenderOperation()

◆ preRender()

◆ getWorldTransforms()

◆ getLights()

◆ visitRenderables()