OGRE  1.12.8
Object-Oriented Graphics Rendering Engine
Ogre::BillboardSet Class Reference

A collection of billboards (faces which are always facing the given direction) with the same (default) dimensions, material and which are fairly close proximity to each other. More...

#include <OgreBillboardSet.h>

+ Inheritance diagram for Ogre::BillboardSet:

Public Member Functions

 BillboardSet (const String &name, unsigned int poolSize=20, bool externalDataSource=false)
 Usual constructor - this is called by the SceneManager. More...
 
virtual ~BillboardSet ()
 
virtual SortMode _getSortMode (void) const
 Gets the sort mode of this billboard set. More...
 
virtual void _notifyBillboardResized (void)
 Internal callback used by Billboards to notify their parent that they have been resized. More...
 
virtual void _notifyBillboardRotated (void)
 Internal callback used by Billboards to notify their parent that they have been rotated. More...
 
virtual void _notifyCurrentCamera (Camera *cam) override
 Internal method to notify the object of the camera to be used for the next rendering operation. More...
 
void _releaseManualHardwareResources ()
 Notifies the movable object that hardware resources were lost. More...
 
virtual void _sortBillboards (Camera *cam)
 Sort the billboard set. More...
 
virtual void _updateBounds (void)
 Update the bounds of the billboardset. More...
 
virtual void _updateRenderQueue (RenderQueue *queue) override
 Internal method by which the movable object must add Renderable subclass instances to the rendering queue. More...
 
void beginBillboards (size_t numBillboards=0)
 Begin injection of billboard data; applicable when constructing the BillboardSet for external data use. More...
 
virtual void clear ()
 Empties this set of all billboards. More...
 
BillboardcreateBillboard (const Vector3 &position, const ColourValue &colour=ColourValue::White)
 Creates a new billboard and adds it to this set. More...
 
BillboardcreateBillboard (Real x, Real y, Real z, const ColourValue &colour=ColourValue::White)
 Creates a new billboard and adds it to this set. More...
 
void endBillboards (void)
 Finish defining billboards. More...
 
virtual bool getAutoextend (void) const
 Returns true if the billboard pool automatically extends. More...
 
bool getAutoUpdate (void) const
 Return the auto update state of this billboard set. More...
 
virtual BillboardgetBillboard (unsigned int index) const
 Returns a pointer to the billboard at the supplied index. More...
 
virtual BillboardOrigin getBillboardOrigin (void) const
 Gets the point which acts as the origin point for all billboards in this set. More...
 
virtual BillboardRotationType getBillboardRotationType (void) const
 Sets billboard rotation type. More...
 
bool getBillboardsInWorldSpace ()
 Gets whether billboards are treated as being in world space. More...
 
virtual BillboardType getBillboardType (void) const
 Returns the billboard type in use. More...
 
virtual const AxisAlignedBoxgetBoundingBox (void) const override
 Retrieves the local axis-aligned bounding box for this object. More...
 
virtual Real getBoundingRadius (void) const override
 Retrieves the radius of the origin-centered bounding sphere for this object. More...
 
virtual const Vector3getCommonDirection (void) const
 Gets the common direction for all billboards (BBT_ORIENTED_COMMON) More...
 
virtual const Vector3getCommonUpVector (void) const
 Gets the common up-vector for all billboards (BBT_PERPENDICULAR_SELF and BBT_PERPENDICULAR_COMMON) More...
 
virtual bool getCullIndividually (void) const
 Returns whether or not billboards in this are tested individually for culling. More...
 
virtual Real getDefaultHeight (void) const
 See setDefaultDimensions - this gets 1 component individually. More...
 
virtual Real getDefaultWidth (void) const
 See setDefaultDimensions - this gets 1 component individually. More...
 
const LightListgetLights (void) const
 Gets a list of lights, ordered relative to how close they are to this renderable. More...
 
virtual const MaterialPtrgetMaterial (void) const override
 Retrieves a weak reference to the material this renderable object uses. More...
 
virtual const StringgetMaterialName (void) const
 Sets the name of the material to be used for this billboard set. More...
 
virtual const StringgetMovableType (void) const override
 Returns the type name of this object. More...
 
virtual int getNumBillboards (void) const
 Returns the number of active billboards which currently make up this set. More...
 
virtual unsigned int getPoolSize (void) const
 Returns the current size of the billboard pool. More...
 
virtual void getRenderOperation (RenderOperation &op) override
 Gets the render operation required to send this object to the frame buffer. More...
 
virtual bool getSortingEnabled (void) const
 Returns true if sorting of billboards is enabled based on their distance from the camera. More...
 
Real getSquaredViewDepth (const Camera *cam) const override
 Returns the camera-relative squared depth of this renderable. More...
 
const std::vector< FloatRect > & getTextureCoords () const
 getTextureCoords() returns the current texture coordinate rects in effect. More...
 
const Ogre::FloatRectgetTextureCoords (uint16 *oNumCoords)
 
uint32 getTypeFlags (void) const
 Override to return specific type flag. More...
 
virtual bool getUseAccurateFacing (void) const
 Gets whether or not billboards use an 'accurate' facing model based on the vector from each billboard to the camera, rather than an optimised version using just the camera direction. More...
 
virtual void getWorldTransforms (Matrix4 *xform) const override
 Gets the world transform matrix / matrices for this renderable object. More...
 
void injectBillboard (const Billboard &bb)
 Define a billboard. More...
 
virtual bool isPointRenderingEnabled (void) const
 Returns whether point rendering is enabled. More...
 
void notifyBillboardDataChanged (void)
 When billboard set is not auto updating its GPU buffer, the user is responsible to inform it about any billboard changes in order to reflect them at the rendering stage. More...
 
virtual void removeBillboard (Billboard *pBill)
 Removes a billboard from the set. More...
 
virtual void removeBillboard (unsigned int index)
 Removes the billboard at the supplied index. More...
 
virtual void setAutoextend (bool autoextend)
 Tells the set whether to allow automatic extension of the pool of billboards. More...
 
void setAutoUpdate (bool autoUpdate)
 Set the auto update state of this billboard set. More...
 
virtual void setBillboardOrigin (BillboardOrigin origin)
 Sets the point which acts as the origin point for all billboards in this set. More...
 
virtual void setBillboardRotationType (BillboardRotationType rotationType)
 Sets billboard rotation type. More...
 
virtual void setBillboardsInWorldSpace (bool ws)
 Sets whether billboards should be treated as being in world space. More...
 
virtual void setBillboardType (BillboardType bbt)
 Sets the type of billboard to render. More...
 
void setBounds (const AxisAlignedBox &box, Real radius)
 Set the bounds of the BillboardSet. More...
 
virtual void setCommonDirection (const Vector3 &vec)
 Use this to specify the common direction given to billboards of type BBT_ORIENTED_COMMON or BBT_PERPENDICULAR_COMMON. More...
 
virtual void setCommonUpVector (const Vector3 &vec)
 Use this to specify the common up-vector given to billboards of type BBT_PERPENDICULAR_SELF or BBT_PERPENDICULAR_COMMON. More...
 
virtual void setCullIndividually (bool cullIndividual)
 Sets whether culling tests billboards in this individually as well as in a group. More...
 
virtual void setDefaultDimensions (Real width, Real height)
 Sets the default dimensions of the billboards in this set. More...
 
virtual void setDefaultHeight (Real height)
 See setDefaultDimensions - this sets 1 component individually. More...
 
virtual void setDefaultWidth (Real width)
 See setDefaultDimensions - this sets 1 component individually. More...
 
virtual void setMaterial (const MaterialPtr &material)
 Sets the name of the material to be used for this billboard set. More...
 
virtual void setMaterialName (const String &name, const String &groupName=ResourceGroupManager::AUTODETECT_RESOURCE_GROUP_NAME)
 Sets the name of the material to be used for this billboard set. More...
 
virtual void setPointRenderingEnabled (bool enabled)
 Set whether or not the BillboardSet will use point rendering rather than manually generated quads. More...
 
virtual void setPoolSize (size_t size)
 Adjusts the size of the pool of billboards available in this set. More...
 
virtual void setSortingEnabled (bool sortenable)
 Enables sorting for this BillboardSet. More...
 
void setTextureCoords (const std::vector< FloatRect > &coords)
 BillboardSet can use custom texture coordinates for various billboards. More...
 
void setTextureCoords (FloatRect const *coords, uint16 numCoords)
 
virtual void setTextureStacksAndSlices (uchar stacks, uchar slices)
 setTextureStacksAndSlices() will generate texture coordinate rects as if the texture for the billboard set contained 'stacks' rows of 'slices' images each, all equal size. More...
 
virtual void setUseAccurateFacing (bool acc)
 Sets whether or not billboards should use an 'accurate' facing model based on the vector from each billboard to the camera, rather than an optimised version using just the camera direction. 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...
 
- Public Member Functions inherited from Ogre::MovableObject
 MovableObject ()
 Constructor. More...
 
 MovableObject (const String &name)
 Named constructor. More...
 
virtual ~MovableObject ()
 Virtual destructor - read Scott Meyers if you don't know why this is needed. More...
 
MovableObjectFactory_getCreator (void) const
 Get the creator of this object, if any (internal use only) More...
 
LightList_getLightList ()
 Returns a pointer to the current list of lights for this object. More...
 
SceneManager_getManager (void) const
 Get the manager of this object, if any (internal use only) More...
 
virtual const Affine3_getParentNodeFullTransform (void) const
 Return the full transformation of the parent sceneNode or the attachingPoint node. More...
 
virtual void _notifyAttached (Node *parent, bool isTagPoint=false)
 Internal method called to notify the object that it has been attached to a node. More...
 
virtual void _notifyCreator (MovableObjectFactory *fact)
 Notify the object of it's creator (internal use only) More...
 
virtual void _notifyManager (SceneManager *man)
 Notify the object of it's manager (internal use only) More...
 
virtual void _notifyMoved (void)
 Internal method called to notify the object that it has been moved. 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 (void)
 Detaches an object from a parent SceneNode or TagPoint, if attached. More...
 
bool getCastShadows (void) const
 Returns whether shadow casting is enabled for this object. More...
 
const AxisAlignedBoxgetDarkCapBounds (const Light &light, Real dirLightExtrusionDist) const override
 Gets the world space bounding box of the dark cap, as extruded using the light provided. More...
 
EdgeDatagetEdgeList (void)
 Returns details of the edges which might be used to determine a silhouette. More...
 
const AxisAlignedBoxgetLightCapBounds (void) const override
 Gets the world space bounding box of the light cap. More...
 
uint32 getLightMask () const
 Get a bitwise mask which will filter the lights affecting this object. More...
 
ListenergetListener (void) const
 Gets the current listener for this object. More...
 
const StringgetName (void) const
 Returns the name of this object. More...
 
NodegetParentNode (void) const
 Returns the node to which this object is attached. More...
 
SceneNodegetParentSceneNode (void) const
 Returns the scene node to which this object is attached. More...
 
Real getPointExtrusionDistance (const Light *l) const
 Get the distance to extrude for a point/spot light. More...
 
uint32 getQueryFlags (void) const
 Returns the query flags relevant for this object. More...
 
bool getReceivesShadows ()
 Returns whether the Material of any Renderable that this MovableObject will add to the render queue will receive shadows. More...
 
Real getRenderingDistance (void) 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 (void) const
 Gets the queue group for this entity. More...
 
const ShadowRenderableListgetShadowVolumeRenderableList (ShadowTechnique shadowTechnique, const Light *light, HardwareIndexBufferSharedPtr *indexBuffer, size_t *indexBufferUsedSize, bool extrudeVertices, Real extrusionDist, unsigned long flags=0)
 Define a default implementation of method from ShadowCaster which implements no shadows. More...
 
const AnygetUserAny (void) const
 
UserObjectBindingsgetUserObjectBindings ()
 Return an instance of user objects binding associated with this class. More...
 
const UserObjectBindingsgetUserObjectBindings () const
 Return an instance of user objects binding associated with this class. More...
 
uint32 getVisibilityFlags (void) const
 Returns the visibility flags relevant for this object. More...
 
bool getVisible (void) const
 Gets this object whether to be visible or not, if it has a renderable component. More...
 
virtual const AxisAlignedBoxgetWorldBoundingBox (bool derive=false) const
 Retrieves the axis-aligned bounding box for this object in world coordinates. More...
 
virtual const SpheregetWorldBoundingSphere (bool derive=false) const
 Retrieves the worldspace bounding sphere for this object. More...
 
bool isAttached (void) const
 Returns true if this object is attached to a SceneNode or TagPoint. More...
 
bool isDebugDisplayEnabled (void) const
 Gets whether debug display of this object is enabled. More...
 
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. More...
 
bool isParentTagPoint () const
 Gets whether the parent node is a TagPoint (or a SceneNode) More...
 
virtual bool isVisible (void) const
 Returns whether or not this object is supposed to be visible or not. More...
 
const LightListqueryLights (void) 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 setCastShadows (bool enabled)
 Sets whether or not this object will cast shadows. More...
 
void setDebugDisplayEnabled (bool enabled)
 Sets whether or not the debug display of this object is enabled. 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 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...
 
virtual void setRenderQueueGroupAndPriority (uint8 queueID, ushort priority)
 Sets the render queue group and group priority this entity will be rendered through. More...
 
void setUserAny (const Any &anything)
 
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::ShadowCaster
virtual ~ShadowCaster ()
 
virtual ShadowRenderableListIterator getShadowVolumeRenderableIterator (ShadowTechnique shadowTechnique, const Light *light, HardwareIndexBufferSharedPtr *indexBuffer, size_t *indexBufferUsedSize, bool extrudeVertices, Real extrusionDistance, unsigned long flags=0)
 
bool hasEdgeList ()
 Returns whether the object has a valid edge list. 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 StringVectorgetAnimableValueNames (void) const
 Gets a list of animable value names for this object. More...
 
- Public Member Functions inherited from Ogre::Renderable
 Renderable ()
 
virtual ~Renderable ()
 Virtual destructor needed as class has virtual methods. 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...
 
virtual bool getCastsShadows (void) const
 Method which reports whether this renderable would normally cast a shadow. More...
 
const Vector4getCustomParameter (size_t index) const
 Gets the custom value associated with this Renderable at the given index. More...
 
virtual unsigned short getNumWorldTransforms (void) const
 Returns the number of world transform matrices this renderable requires. More...
 
bool getPolygonModeOverrideable (void) const
 Gets whether this renderable's chosen detail level can be overridden (downgraded) by the camera setting. More...
 
const RenderSystemDataPtrgetRenderSystemData () const
 
virtual TechniquegetTechnique (void) const
 Retrieves a pointer to the Material Technique this renderable object uses. More...
 
bool getUseIdentityProjection (void) const
 Returns whether or not to use an 'identity' projection. More...
 
bool getUseIdentityView (void) const
 Returns whether or not to use an 'identity' view. More...
 
const AnygetUserAny (void) const
 
UserObjectBindingsgetUserObjectBindings ()
 Return an instance of user objects binding associated with this class. More...
 
const UserObjectBindingsgetUserObjectBindings () const
 Return an instance of user objects binding associated with this class. More...
 
bool hasCustomParameter (size_t index) const
 Checks whether a custom value is associated with this Renderable at the given index. More...
 
virtual void postRender (SceneManager *sm, RenderSystem *rsys)
 Called immediately after the Renderable has been rendered. More...
 
virtual bool preRender (SceneManager *sm, RenderSystem *rsys)
 Called just prior to the Renderable being rendered. More...
 
void removeCustomParameter (size_t index)
 Removes a custom value which is associated with this Renderable at the given index. 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...
 
void setPolygonModeOverrideable (bool override)
 Sets whether this renderable's chosen detail level can be overridden (downgraded) by the camera setting. More...
 
void setRenderSystemData (RenderSystemDataPtr val) const
 
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...
 
void setUserAny (const Any &anything)
 

Additional Inherited Members

- Public Types inherited from Ogre::ShadowCaster
typedef std::vector< ShadowRenderable * > ShadowRenderableList
 
typedef VectorIterator< ShadowRenderableListShadowRenderableListIterator
 
- Public Types inherited from Ogre::Renderable
enum  { DEFAULT_PRIORITY = 100 }
 
typedef SharedPtr< RenderSystemDataRenderSystemDataPtr
 
- Static Public Member Functions inherited from Ogre::MovableObject
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 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 Public Member Functions inherited from Ogre::ShadowCaster
static void clearShadowRenderableList (ShadowRenderableList &shadowRenderables)
 Common implementation of releasing shadow renderables. More...
 
static void extrudeVertices (const HardwareVertexBufferSharedPtr &vertexBuffer, size_t originalVertexCount, const Vector4 &lightPos, Real extrudeDist)
 Utility method for extruding vertices based on a light. More...
 

Detailed Description

A collection of billboards (faces which are always facing the given direction) with the same (default) dimensions, material and which are fairly close proximity to each other.

Remarks
Billboards are rectangles made up of 2 tris which are always facing the given direction. They are typically used for special effects like particles. This class collects together a set of billboards with the same (default) dimensions, material and relative locality in order to process them more efficiently. The entire set of billboards will be culled as a whole (by default, although this can be changed if you want a large set of billboards which are spread out and you want them culled individually), individual Billboards have locations which are relative to the set (which itself derives it's position from the SceneNode it is attached to since it is a MoveableObject), they will be rendered as a single rendering operation, and some calculations will be sped up by the fact that they use the same dimensions so some workings can be reused.
A BillboardSet can be created using the SceneManager::createBillboardSet method. They can also be used internally by other classes to create effects.
Note
Billboard bounds are only automatically calculated when you create them. If you modify the position of a billboard you may need to call _updateBounds if the billboard moves outside the original bounds. Similarly, the bounds do no shrink when you remove a billboard, if you want them to call _updateBounds, but note this requires a potentially expensive examination of every billboard in the set.

Constructor & Destructor Documentation

◆ BillboardSet()

Ogre::BillboardSet::BillboardSet ( const String name,
unsigned int  poolSize = 20,
bool  externalDataSource = false 
)

Usual constructor - this is called by the SceneManager.

Parameters
nameThe name to give the billboard set (must be unique)
poolSizeThe initial size of the billboard pool. Estimate of the number of billboards which will be required, and pass it using this parameter. The set will preallocate this number to avoid memory fragmentation. The default behaviour once this pool has run out is to double it.
externalDataSourceIf true, the source of data for drawing the billboards will not be the internal billboard list, but external data. When driving the billboard from external data, you must call _notifyCurrentCamera to reorient the billboards, setPoolSize to set the maximum billboards you want to use, beginBillboards to start the update, and injectBillboard per billboard, followed by endBillboards.
See also
BillboardSet::setAutoextend

◆ ~BillboardSet()

virtual Ogre::BillboardSet::~BillboardSet ( )
virtual

Member Function Documentation

◆ createBillboard() [1/2]

Billboard* Ogre::BillboardSet::createBillboard ( const Vector3 position,
const ColourValue colour = ColourValue::White 
)

Creates a new billboard and adds it to this set.

Remarks
Behaviour once the billboard pool has been exhausted depends on the BillboardSet::setAutoextend option.
Parameters
positionThe position of the new billboard realtive to the certer of the set
colourOptional base colour of the billboard.
Returns
On success, a pointer to a newly created Billboard is returned.
On failure (i.e. no more space and can't autoextend), NULL is returned.
See also
BillboardSet::setAutoextend

◆ createBillboard() [2/2]

Billboard* Ogre::BillboardSet::createBillboard ( Real  x,
Real  y,
Real  z,
const ColourValue colour = ColourValue::White 
)

Creates a new billboard and adds it to this set.

Remarks
Behaviour once the billboard pool has been exhausted depends on the BillboardSet::setAutoextend option.
Parameters
xThe x position of the new billboard relative to the center of the set
yThe y position of the new billboard relative to the center of the set
zThe z position of the new billboard relative to the center of the set
colourOptional base colour of the billboard.
Returns
On success, a pointer to a newly created Billboard is returned.
On failure (i.e. no more space and can't autoextend), NULL is returned.
See also
BillboardSet::setAutoextend

◆ getNumBillboards()

virtual int Ogre::BillboardSet::getNumBillboards ( void  ) const
virtual

Returns the number of active billboards which currently make up this set.

◆ setAutoextend()

virtual void Ogre::BillboardSet::setAutoextend ( bool  autoextend)
virtual

Tells the set whether to allow automatic extension of the pool of billboards.

Remarks
A BillboardSet stores a pool of pre-constructed billboards which are used as needed when a new billboard is requested. This allows applications to create / remove billboards efficiently without incurring construction / destruction costs (a must for sets with lots of billboards like particle effects). This method allows you to configure the behaviour when a new billboard is requested but the billboard pool has been exhausted.
The default behaviour is to allow the pool to extend (typically this allocates double the current pool of billboards when the pool is expended), equivalent to calling this method with autoExtend = true. If you set the parameter to false however, any attempt to create a new billboard when the pool has expired will simply fail silently, returning a null pointer.
Parameters
autoextendtrue to double the pool every time it runs out, false to fail silently.

◆ getAutoextend()

virtual bool Ogre::BillboardSet::getAutoextend ( void  ) const
virtual

Returns true if the billboard pool automatically extends.

See also
BillboardSet::setAutoextend

◆ setSortingEnabled()

virtual void Ogre::BillboardSet::setSortingEnabled ( bool  sortenable)
virtual

Enables sorting for this BillboardSet.

(default: off)

Parameters
sortenabletrue to sort the billboards according to their distance to the camera

◆ getSortingEnabled()

virtual bool Ogre::BillboardSet::getSortingEnabled ( void  ) const
virtual

Returns true if sorting of billboards is enabled based on their distance from the camera.

See also
BillboardSet::setSortingEnabled

◆ setPoolSize()

virtual void Ogre::BillboardSet::setPoolSize ( size_t  size)
virtual

Adjusts the size of the pool of billboards available in this set.

Remarks
See the BillboardSet::setAutoextend method for full details of the billboard pool. This method adjusts the preallocated size of the pool. If you try to reduce the size of the pool, the set has the option of ignoring you if too many billboards are already in use. Bear in mind that calling this method will incur significant construction / destruction calls so should be avoided in time-critical code. The same goes for auto-extension, try to avoid it by estimating the pool size correctly up-front.
Parameters
sizeThe new size for the pool.

◆ getPoolSize()

virtual unsigned int Ogre::BillboardSet::getPoolSize ( void  ) const
virtual

Returns the current size of the billboard pool.

Returns
The current size of the billboard pool.
See also
BillboardSet::setAutoextend

◆ clear()

virtual void Ogre::BillboardSet::clear ( )
virtual

Empties this set of all billboards.

◆ getBillboard()

virtual Billboard* Ogre::BillboardSet::getBillboard ( unsigned int  index) const
virtual

Returns a pointer to the billboard at the supplied index.

Note
This method requires linear time since the billboard list is a linked list.
Parameters
indexThe index of the billboard that is requested.
Returns
On success, a valid pointer to the requested billboard is returned.
On failure, NULL is returned.

◆ removeBillboard() [1/2]

virtual void Ogre::BillboardSet::removeBillboard ( unsigned int  index)
virtual

Removes the billboard at the supplied index.

Note
This method requires linear time since the billboard list is a linked list.

◆ removeBillboard() [2/2]

virtual void Ogre::BillboardSet::removeBillboard ( Billboard pBill)
virtual

Removes a billboard from the set.

Note
This version is more efficient than removing by index.

◆ setBillboardOrigin()

virtual void Ogre::BillboardSet::setBillboardOrigin ( BillboardOrigin  origin)
virtual

Sets the point which acts as the origin point for all billboards in this set.

Remarks
This setting controls the fine tuning of where a billboard appears in relation to it's position. It could be that a billboard's position represents it's center (e.g. for fireballs), it could mean the center of the bottom edge (e.g. a tree which is positioned on the ground), the top-left corner (e.g. a cursor).
The default setting is BBO_CENTER.
Parameters
originA member of the BillboardOrigin enum specifying the origin for all the billboards in this set.

Referenced by Ogre::BillboardParticleRenderer::setBillboardOrigin().

◆ getBillboardOrigin()

virtual BillboardOrigin Ogre::BillboardSet::getBillboardOrigin ( void  ) const
virtual

Gets the point which acts as the origin point for all billboards in this set.

Returns
A member of the BillboardOrigin enum specifying the origin for all the billboards in this set.

Referenced by Ogre::BillboardParticleRenderer::getBillboardOrigin().

◆ setBillboardRotationType()

virtual void Ogre::BillboardSet::setBillboardRotationType ( BillboardRotationType  rotationType)
virtual

Sets billboard rotation type.

Remarks
This setting controls the billboard rotation type, you can deciding rotate the billboard's vertices around their facing direction or rotate the billboard's texture coordinates.
The default settings is BBR_TEXCOORD.
Parameters
rotationTypeA member of the BillboardRotationType enum specifying the rotation type for all the billboards in this set.

◆ getBillboardRotationType()

virtual BillboardRotationType Ogre::BillboardSet::getBillboardRotationType ( void  ) const
virtual

Sets billboard rotation type.

Returns
A member of the BillboardRotationType enum specifying the rotation type for all the billboards in this set.

◆ setDefaultDimensions()

virtual void Ogre::BillboardSet::setDefaultDimensions ( Real  width,
Real  height 
)
virtual

Sets the default dimensions of the billboards in this set.

Remarks
All billboards in a set are created with these default dimensions. The set will render most efficiently if all the billboards in the set are the default size. It is possible to alter the size of individual billboards at the expense of extra calculation. See the Billboard class for more info.
Parameters
widthThe new default width for the billboards in this set.
heightThe new default height for the billboards in this set.

◆ setDefaultWidth()

virtual void Ogre::BillboardSet::setDefaultWidth ( Real  width)
virtual

See setDefaultDimensions - this sets 1 component individually.

◆ getDefaultWidth()

virtual Real Ogre::BillboardSet::getDefaultWidth ( void  ) const
virtual

See setDefaultDimensions - this gets 1 component individually.

◆ setDefaultHeight()

virtual void Ogre::BillboardSet::setDefaultHeight ( Real  height)
virtual

See setDefaultDimensions - this sets 1 component individually.

◆ getDefaultHeight()

virtual Real Ogre::BillboardSet::getDefaultHeight ( void  ) const
virtual

See setDefaultDimensions - this gets 1 component individually.

◆ setMaterialName()

virtual void Ogre::BillboardSet::setMaterialName ( const String name,
const String groupName = ResourceGroupManager::AUTODETECT_RESOURCE_GROUP_NAME 
)
virtual

Sets the name of the material to be used for this billboard set.

◆ getMaterialName()

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

Sets the name of the material to be used for this billboard set.

Returns
The name of the material that is used for this set.

◆ _notifyCurrentCamera()

virtual void Ogre::BillboardSet::_notifyCurrentCamera ( Camera cam)
overridevirtual

Internal method to notify the object of the camera to be used for the next rendering operation.

Remarks
Certain objects may want to do specific processing based on the camera position. This method notifies them in case they wish to do this.

Reimplemented from Ogre::MovableObject.

◆ beginBillboards()

void Ogre::BillboardSet::beginBillboards ( size_t  numBillboards = 0)

Begin injection of billboard data; applicable when constructing the BillboardSet for external data use.

Parameters
numBillboardsIf you know the number of billboards you will be issuing, state it here to make the update more efficient.

◆ injectBillboard()

void Ogre::BillboardSet::injectBillboard ( const Billboard bb)

Define a billboard.

◆ endBillboards()

void Ogre::BillboardSet::endBillboards ( void  )

Finish defining billboards.

◆ setBounds()

void Ogre::BillboardSet::setBounds ( const AxisAlignedBox box,
Real  radius 
)

Set the bounds of the BillboardSet.

Remarks
You may need to call this if you're injecting billboards manually, and you're relying on the BillboardSet to determine culling.

◆ getBoundingBox()

virtual const AxisAlignedBox& Ogre::BillboardSet::getBoundingBox ( void  ) const
overridevirtual

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

Remarks
This bounding box is in local coordinates.

Implements Ogre::MovableObject.

◆ getBoundingRadius()

virtual Real Ogre::BillboardSet::getBoundingRadius ( void  ) const
overridevirtual

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

Implements Ogre::MovableObject.

◆ _updateRenderQueue()

virtual void Ogre::BillboardSet::_updateRenderQueue ( RenderQueue queue)
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.

Implements Ogre::MovableObject.

◆ getMaterial()

virtual const MaterialPtr& Ogre::BillboardSet::getMaterial ( void  ) const
overridevirtual

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

Remarks
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.

◆ setMaterial()

virtual void Ogre::BillboardSet::setMaterial ( const MaterialPtr material)
virtual

Sets the name of the material to be used for this billboard set.

Parameters
materialThe new material to use for this set.

◆ getRenderOperation()

virtual void Ogre::BillboardSet::getRenderOperation ( RenderOperation op)
overridevirtual

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

Implements Ogre::Renderable.

◆ getWorldTransforms()

virtual void Ogre::BillboardSet::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.

Implements Ogre::Renderable.

◆ _notifyBillboardResized()

virtual void Ogre::BillboardSet::_notifyBillboardResized ( void  )
virtual

Internal callback used by Billboards to notify their parent that they have been resized.

◆ _notifyBillboardRotated()

virtual void Ogre::BillboardSet::_notifyBillboardRotated ( void  )
virtual

Internal callback used by Billboards to notify their parent that they have been rotated.

◆ getCullIndividually()

virtual bool Ogre::BillboardSet::getCullIndividually ( void  ) const
virtual

Returns whether or not billboards in this are tested individually for culling.

◆ setCullIndividually()

virtual void Ogre::BillboardSet::setCullIndividually ( bool  cullIndividual)
virtual

Sets whether culling tests billboards in this individually as well as in a group.

Remarks
Billboard sets are always culled as a whole group, based on a bounding box which encloses all billboards in the set. For fairly localised sets, this is enough. However, you can optionally tell the set to also cull individual billboards in the set, i.e. to test each individual billboard before rendering. The default is not to do this.
This is useful when you have a large, fairly distributed set of billboards, like maybe trees on a landscape. You probably still want to group them into more than one set (maybe one set per section of landscape), which will be culled coarsely, but you also want to cull the billboards individually because they are spread out. Whilst you could have lots of single-tree sets which are culled separately, this would be inefficient to render because each tree would be issued as it's own rendering operation.
By calling this method with a parameter of true, you can have large billboard sets which are spaced out and so get the benefit of batch rendering and coarse culling, but also have fine-grained culling so unnecessary rendering is avoided.
Parameters
cullIndividualIf true, each billboard is tested before being sent to the pipeline as well as the whole set having to pass the coarse group bounding test.

◆ setBillboardType()

virtual void Ogre::BillboardSet::setBillboardType ( BillboardType  bbt)
virtual

Sets the type of billboard to render.

Remarks
The default sort of billboard (BBT_POINT), always has both x and y axes parallel to the camera's local axes. This is fine for 'point' style billboards (e.g. flares, smoke, anything which is symmetrical about a central point) but does not look good for billboards which have an orientation (e.g. an elongated raindrop). In this case, the oriented billboards are more suitable (BBT_ORIENTED_COMMON or BBT_ORIENTED_SELF) since they retain an independent Y axis and only the X axis is generated, perpendicular to both the local Y and the camera Z.
In some case you might want the billboard has fixed Z axis and doesn't need to face to camera (e.g. an aureola around the player and parallel to the ground). You can use BBT_PERPENDICULAR_SELF which the billboard plane perpendicular to the billboard own direction. Or BBT_PERPENDICULAR_COMMON which the billboard plane perpendicular to the common direction.
Note
BBT_PERPENDICULAR_SELF and BBT_PERPENDICULAR_COMMON can't guarantee counterclockwise, you might use double-side material (cull_hardware node) to ensure no billboard are culled.
Parameters
bbtThe type of billboard to render

◆ getBillboardType()

virtual BillboardType Ogre::BillboardSet::getBillboardType ( void  ) const
virtual

Returns the billboard type in use.

◆ setCommonDirection()

virtual void Ogre::BillboardSet::setCommonDirection ( const Vector3 vec)
virtual

Use this to specify the common direction given to billboards of type BBT_ORIENTED_COMMON or BBT_PERPENDICULAR_COMMON.

Remarks
Use BBT_ORIENTED_COMMON when you want oriented billboards but you know they are always going to be oriented the same way (e.g. rain in calm weather). It is faster for the system to calculate the billboard vertices if they have a common direction.
The common direction also use in BBT_PERPENDICULAR_COMMON, in this case the common direction treat as Z axis, and an additional common up-vector was use to determine billboard X and Y axis.
See also
setCommonUpVector
Parameters
vecThe direction for all billboards.
Note
The direction are use as is, never normalised in internal, user are supposed to normalise it himself.

◆ getCommonDirection()

virtual const Vector3& Ogre::BillboardSet::getCommonDirection ( void  ) const
virtual

Gets the common direction for all billboards (BBT_ORIENTED_COMMON)

◆ setCommonUpVector()

virtual void Ogre::BillboardSet::setCommonUpVector ( const Vector3 vec)
virtual

Use this to specify the common up-vector given to billboards of type BBT_PERPENDICULAR_SELF or BBT_PERPENDICULAR_COMMON.

Remarks
Use BBT_PERPENDICULAR_SELF or BBT_PERPENDICULAR_COMMON when you want oriented billboards perpendicular to specify direction vector (or, Z axis), and doesn't face to camera. In this case, we need an additional up-vector to determine the billboard X and Y axis. The generated billboard plane and X-axis guarantee perpendicular to specify direction.
See also
setCommonDirection
The specify direction is billboard own direction when billboard type is BBT_PERPENDICULAR_SELF, and it's shared common direction when billboard type is BBT_PERPENDICULAR_COMMON.
Parameters
vecThe up-vector for all billboards.
Note
The up-vector are use as is, never normalised in internal, user are supposed to normalise it himself.

◆ getCommonUpVector()

virtual const Vector3& Ogre::BillboardSet::getCommonUpVector ( void  ) const
virtual

Gets the common up-vector for all billboards (BBT_PERPENDICULAR_SELF and BBT_PERPENDICULAR_COMMON)

◆ setUseAccurateFacing()

virtual void Ogre::BillboardSet::setUseAccurateFacing ( bool  acc)
inlinevirtual

Sets whether or not billboards should use an 'accurate' facing model based on the vector from each billboard to the camera, rather than an optimised version using just the camera direction.

Remarks
By default, the axes for all billboards are calculated using the camera's view direction, not the vector from the camera position to the billboard. The former is faster, and most of the time the difference is not noticeable. However for some purposes (e.g. very large, static billboards) the changing billboard orientation when rotating the camera can be off putting, therefore you can enable this option to use a more expensive, but more accurate version.
Parameters
accTrue to use the slower but more accurate model. Default is false.

◆ getUseAccurateFacing()

virtual bool Ogre::BillboardSet::getUseAccurateFacing ( void  ) const
inlinevirtual

Gets whether or not billboards use an 'accurate' facing model based on the vector from each billboard to the camera, rather than an optimised version using just the camera direction.

◆ getMovableType()

virtual const String& Ogre::BillboardSet::getMovableType ( void  ) const
overridevirtual

Returns the type name of this object.

Implements Ogre::MovableObject.

◆ getSquaredViewDepth()

Real Ogre::BillboardSet::getSquaredViewDepth ( const Camera cam) const
overridevirtual

Returns the camera-relative squared depth of this renderable.

Remarks
Used to sort transparent objects. Squared depth is used rather than actual depth to avoid having to perform a square root on the result.

Implements Ogre::Renderable.

◆ _updateBounds()

virtual void Ogre::BillboardSet::_updateBounds ( void  )
virtual

Update the bounds of the billboardset.

◆ getLights()

const LightList& Ogre::BillboardSet::getLights ( void  ) const
virtual

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.

◆ visitRenderables()

void Ogre::BillboardSet::visitRenderables ( Renderable::Visitor visitor,
bool  debugRenderables = false 
)
virtual

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
visitorPointer 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.
debugRenderablesIf false, only regular renderables will be visited (those for normal display). If true, debug renderables will be included too.

Implements Ogre::MovableObject.

◆ _sortBillboards()

virtual void Ogre::BillboardSet::_sortBillboards ( Camera cam)
virtual

Sort the billboard set.

Only called when enabled via setSortingEnabled

◆ _getSortMode()

virtual SortMode Ogre::BillboardSet::_getSortMode ( void  ) const
virtual

Gets the sort mode of this billboard set.

◆ setBillboardsInWorldSpace()

virtual void Ogre::BillboardSet::setBillboardsInWorldSpace ( bool  ws)
inlinevirtual

Sets whether billboards should be treated as being in world space.

Remarks
This is most useful when you are driving the billboard set from an external data source.

◆ getBillboardsInWorldSpace()

bool Ogre::BillboardSet::getBillboardsInWorldSpace ( )
inline

Gets whether billboards are treated as being in world space.

◆ setTextureCoords() [1/2]

void Ogre::BillboardSet::setTextureCoords ( const std::vector< FloatRect > &  coords)

BillboardSet can use custom texture coordinates for various billboards.

This is useful for selecting one of many particle images out of a tiled texture sheet, or doing flipbook animation within a single texture.

The generic functionality is setTextureCoords(), which will copy the texture coordinate rects you supply into internal storage for the billboard set. If your texture sheet is a square grid, you can also use setTextureStacksAndSlices() for more convenience, which will construct the set of texture coordinates for you.
When a Billboard is created, it can be assigned a texture coordinate set from within the sets you specify (that set can also be re-specified later). When drawn, the billboard will use those texture coordinates, rather than the full 0-1 range.
Parameters
coordsis a vector of texture coordinates (in UV space) to choose from for each billboard created in the set.
Remarks
Set 'coords' to 0 and/or 'numCoords' to 0 to reset the texture coord rects to the initial set of a single rectangle spanning 0 through 1 in both U and V (i e, the entire texture).
See also
BillboardSet::setTextureStacksAndSlices() Billboard::setTexcoordIndex()

◆ setTextureCoords() [2/2]

void Ogre::BillboardSet::setTextureCoords ( FloatRect const *  coords,
uint16  numCoords 
)
inline

◆ setTextureStacksAndSlices()

virtual void Ogre::BillboardSet::setTextureStacksAndSlices ( uchar  stacks,
uchar  slices 
)
virtual

setTextureStacksAndSlices() will generate texture coordinate rects as if the texture for the billboard set contained 'stacks' rows of 'slices' images each, all equal size.

Thus, if the texture size is 512x512 and 'stacks' is 4 and 'slices' is 8, each sub-rectangle of the texture would be 128 texels tall and 64 texels wide.

Remarks
This function is short-hand for creating a regular set and calling setTextureCoords() yourself. The numbering used for Billboard::setTexcoordIndex() counts first across, then down, so top-left is 0, the one to the right of that is 1, and the lower-right is stacks*slices-1.
See also
BillboardSet::setTextureCoords()

◆ getTextureCoords() [1/2]

const std::vector<FloatRect>& Ogre::BillboardSet::getTextureCoords ( ) const
inline

getTextureCoords() returns the current texture coordinate rects in effect.

By default, there is only one texture coordinate rect in the set, spanning the entire texture from 0 through 1 in each direction.

See also
BillboardSet::setTextureCoords()

◆ getTextureCoords() [2/2]

const Ogre::FloatRect* Ogre::BillboardSet::getTextureCoords ( uint16 oNumCoords)

◆ setPointRenderingEnabled()

virtual void Ogre::BillboardSet::setPointRenderingEnabled ( bool  enabled)
virtual

Set whether or not the BillboardSet will use point rendering rather than manually generated quads.

Remarks
By default a billboardset is rendered by generating geometry for a textured quad in memory, taking into account the size and orientation settings, and uploading it to the video card. The alternative is to use hardware point rendering, which means that only one position needs to be sent per billboard rather than 4 and the hardware sorts out how this is rendered based on the render state.
Using point rendering is faster than generating quads manually, but is more restrictive. The following restrictions apply:
  • Only the BBT_POINT type is supported
  • Size and appearance of each billboard is controlled by the material (Pass::setPointSize, Pass::setPointSizeAttenuation, Pass::setPointSpritesEnabled)
  • Per-billboard size is not supported (stems from the above)
  • Per-billboard rotation is not supported, this can only be controlled through texture unit rotation
  • Only BBO_CENTER origin is supported
  • Per-billboard texture coordinates are not supported
You will almost certainly want to enable in your material pass both point attenuation and point sprites if you use this option.
Parameters
enabledTrue to enable point rendering, false otherwise

◆ isPointRenderingEnabled()

virtual bool Ogre::BillboardSet::isPointRenderingEnabled ( void  ) const
inlinevirtual

Returns whether point rendering is enabled.

◆ getTypeFlags()

uint32 Ogre::BillboardSet::getTypeFlags ( void  ) const
virtual

Override to return specific type flag.

Reimplemented from Ogre::MovableObject.

◆ setAutoUpdate()

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

Set the auto update state of this billboard set.

Remarks
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::BillboardSet::getAutoUpdate ( void  ) const
inline

Return the auto update state of this billboard set.

◆ notifyBillboardDataChanged()

void Ogre::BillboardSet::notifyBillboardDataChanged ( void  )
inline

When billboard set is not auto updating its GPU buffer, the user is responsible to inform it about any billboard changes in order to reflect them at the rendering stage.

Calling this method will cause GPU buffers update in the next render queue update.

◆ _releaseManualHardwareResources()

void Ogre::BillboardSet::_releaseManualHardwareResources ( )
inlinevirtual

Notifies the movable object that hardware resources were lost.

Remarks
Called automatically by RenderSystem if hardware resources were lost and can not be restored using some internal mechanism. Among affected resources are nested shadow renderables, ManualObjects, etc.

Reimplemented from Ogre::MovableObject.


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