OpenSceneGraph  3.0.1
Classes | Public Types | Public Member Functions | Protected Types | Protected Member Functions | Protected Attributes | List of all members
osgShadow::OccluderGeometry Class Reference

OccluderGeometry provides a sepecialised geometry representation of objects in scene that occlude light and therefore cast shadows. More...

Inheritance diagram for osgShadow::OccluderGeometry:
Inheritance graph
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Classes

struct  Edge
 

Public Types

typedef std::vector< osg::Vec3Vec3List
 
typedef std::vector< GLuint > UIntList
 
- Public Types inherited from osg::Drawable
enum  AttributeTypes {
  VERTICES = 0, WEIGHTS = 1, NORMALS = 2, COLORS = 3,
  SECONDARY_COLORS = 4, FOG_COORDS = 5, ATTRIBUTE_6 = 6, ATTRIBUTE_7 = 7,
  TEXTURE_COORDS = 8, TEXTURE_COORDS_0 = TEXTURE_COORDS, TEXTURE_COORDS_1 = TEXTURE_COORDS_0+1, TEXTURE_COORDS_2 = TEXTURE_COORDS_0+2,
  TEXTURE_COORDS_3 = TEXTURE_COORDS_0+3, TEXTURE_COORDS_4 = TEXTURE_COORDS_0+4, TEXTURE_COORDS_5 = TEXTURE_COORDS_0+5, TEXTURE_COORDS_6 = TEXTURE_COORDS_0+6,
  TEXTURE_COORDS_7 = TEXTURE_COORDS_0+7
}
 
typedef std::vector< Node * > ParentList
 A vector of osg::Node pointers which is used to store the parent(s) of drawable. More...
 
typedef unsigned int AttributeType
 
- Public Types inherited from osg::Object
enum  DataVariance { DYNAMIC, STATIC, UNSPECIFIED }
 

Public Member Functions

 OccluderGeometry ()
 
 OccluderGeometry (const OccluderGeometry &oc, const osg::CopyOp &copyop=osg::CopyOp::SHALLOW_COPY)
 
virtual ObjectcloneType () const
 Clone the type of an object, with Object* return type. More...
 
virtual Objectclone (const osg::CopyOp &copyop) const
 Clone an object, with Object* return type. More...
 
virtual bool isSameKindAs (const osg::Object *obj) const
 
virtual const char * libraryName () const
 return the name of the object's library. More...
 
virtual const char * className () const
 return the name of the object's class type. More...
 
void computeOccluderGeometry (osg::Node *subgraph, osg::Matrix *matrix=0, float sampleRatio=1.0f)
 Compute an occluder geometry containing all the geometry in specified subgraph. More...
 
void computeOccluderGeometry (osg::Drawable *drawable, osg::Matrix *matrix=0, float sampleRatio=1.0f)
 Compute an occluder geometry containing the geometry in specified drawable. More...
 
void computeShadowVolumeGeometry (const osg::Vec4 &lightpos, ShadowVolumeGeometry &svg) const
 Compute ShadowVolumeGeometry. More...
 
void setBoundingPolytope (const osg::Polytope &polytope)
 Set the bounding polytope of the OccluderGeometry. More...
 
osg::PolytopegetBoundingPolytope ()
 Get the bounding polytope of the OccluderGeometry. More...
 
const osg::PolytopegetBoundingPolytope () const
 Get the const bounding polytope of the OccluderGeometry. More...
 
virtual void drawImplementation (osg::RenderInfo &renderInfo) const
 Render the occluder geometry. More...
 
virtual osg::BoundingBox computeBound () const
 Compute the bounding box around occluder geometry. More...
 
void processGeometry (osg::Drawable *drawable, osg::Matrix *matrix=0, float sampleRatio=1.0f)
 
- Public Member Functions inherited from osg::Drawable
 Drawable ()
 
 Drawable (const Drawable &drawable, const CopyOp &copyop=CopyOp::SHALLOW_COPY)
 Copy constructor using CopyOp to manage deep vs shallow copy. More...
 
virtual GeometryasGeometry ()
 Convert 'this' into a Geometry pointer if Drawable is a Geometry, otherwise return 0. More...
 
virtual const GeometryasGeometry () const
 Convert 'const this' into a const Geometry pointer if Drawable is a Geometry, otherwise return 0. More...
 
virtual void computeDataVariance ()
 Compute the DataVariance based on an assessment of callback etc. More...
 
const ParentListgetParents () const
 Get the parent list of drawable. More...
 
ParentList getParents ()
 Get the a copy of parent list of node. More...
 
NodegetParent (unsigned int i)
 Get a single parent of Drawable. More...
 
const NodegetParent (unsigned int i) const
 Get a single const parent of Drawable. More...
 
unsigned int getNumParents () const
 Get the number of parents of node. More...
 
MatrixList getWorldMatrices (const osg::Node *haltTraversalAtNode=0) const
 Get the list of matrices that transform this node from local coordinates to world coordinates. More...
 
void setStateSet (StateSet *stateset)
 Set the StateSet attached to the Drawable. More...
 
StateSetgetStateSet ()
 Get the attached StateSet. More...
 
const StateSetgetStateSet () const
 Get the attached const StateSet. More...
 
StateSetgetOrCreateStateSet ()
 Get the attached const StateSet, if one is not already attached create one, attach it to the drawable and return a pointer to it. More...
 
void setInitialBound (const osg::BoundingBox &bbox)
 Set the initial bounding volume to use when computing the overall bounding volume. More...
 
const BoundingBoxgetInitialBound () const
 Set the initial bounding volume to use when computing the overall bounding volume. More...
 
void dirtyBound ()
 Dirty the bounding box, forcing a computeBound() on the next call to getBound(). More...
 
const BoundingBoxgetBound () const
 Get BoundingBox of Drawable. More...
 
void setComputeBoundingBoxCallback (ComputeBoundingBoxCallback *callback)
 Set the compute bound callback to override the default computeBound. More...
 
ComputeBoundingBoxCallbackgetComputeBoundingBoxCallback ()
 Get the compute bound callback. More...
 
const ComputeBoundingBoxCallbackgetComputeBoundingBoxCallback () const
 Get the const compute bound callback. More...
 
void setShape (Shape *shape)
 Set the Shape of the Drawable. More...
 
ShapegetShape ()
 Get the Shape of the Drawable. More...
 
const ShapegetShape () const
 Get the const Shape of the const Drawable. More...
 
void setSupportsDisplayList (bool flag)
 Set the drawable so that it can or cannot be used in conjunction with OpenGL display lists. More...
 
bool getSupportsDisplayList () const
 Get whether display lists are supported for this drawable instance. More...
 
void setUseDisplayList (bool flag)
 When set to true, force the draw method to use OpenGL Display List for rendering. More...
 
bool getUseDisplayList () const
 Return whether OpenGL display lists are being used for rendering. More...
 
GLuint & getDisplayList (unsigned int contextID) const
 Return OpenGL display list for specified contextID. More...
 
virtual void setUseVertexBufferObjects (bool flag)
 When set to true, ignore the setUseDisplayList() settings, and hints to the drawImplementation method to use OpenGL vertex buffer objects for rendering. More...
 
bool getUseVertexBufferObjects () const
 Return whether OpenGL vertex buffer objects should be used when supported by OpenGL driver. More...
 
virtual void dirtyDisplayList ()
 Force a recompile on next draw() of any OpenGL display list associated with this geoset. More...
 
virtual unsigned int getGLObjectSizeHint () const
 Return the estimated size of GLObjects (display lists/vertex buffer objects) that are associated with this drawable. More...
 
void draw (RenderInfo &renderInfo) const
 Draw OpenGL primitives. More...
 
virtual void compileGLObjects (RenderInfo &renderInfo) const
 Immediately compile this Drawable into an OpenGL Display List/VertexBufferObjects. More...
 
virtual void setThreadSafeRefUnref (bool threadSafe)
 Set whether to use a mutex to ensure ref() and unref() are thread safe. More...
 
virtual void resizeGLObjectBuffers (unsigned int maxSize)
 Resize any per context GLObject buffers to specified size. More...
 
virtual void releaseGLObjects (State *state=0) const
 If State is non-zero, this function releases OpenGL objects for the specified graphics context. More...
 
virtual void setUpdateCallback (UpdateCallback *ac)
 Set the UpdateCallback which allows users to attach customize the updating of an object during the update traversal. More...
 
UpdateCallbackgetUpdateCallback ()
 Get the non const UpdateCallback. More...
 
const UpdateCallbackgetUpdateCallback () const
 Get the const UpdateCallback. More...
 
bool requiresUpdateTraversal () const
 Return whether this Drawable has update callbacks associated with it, and therefore must be traversed. More...
 
virtual void setEventCallback (EventCallback *ac)
 Set the EventCallback which allows users to attach customize the updating of an object during the Event traversal. More...
 
EventCallbackgetEventCallback ()
 Get the non const EventCallback. More...
 
const EventCallbackgetEventCallback () const
 Get the const EventCallback. More...
 
bool requiresEventTraversal () const
 Return whether this Drawable has event callbacks associated with it, and therefore must be traversed. More...
 
virtual void setCullCallback (CullCallback *cc)
 Set the CullCallback which allows users to customize the culling of Drawable during the cull traversal. More...
 
CullCallbackgetCullCallback ()
 Get the non const CullCallback. More...
 
const CullCallbackgetCullCallback () const
 Get the const CullCallback. More...
 
virtual void setDrawCallback (DrawCallback *dc)
 Set the DrawCallback which allows users to attach customize the drawing of existing Drawable object. More...
 
DrawCallbackgetDrawCallback ()
 Get the non const DrawCallback. More...
 
const DrawCallbackgetDrawCallback () const
 Get the const DrawCallback. More...
 
virtual bool supports (const AttributeFunctor &) const
 Return true if the Drawable subclass supports accept(AttributeFunctor&). More...
 
virtual void accept (AttributeFunctor &)
 accept an AttributeFunctor and call its methods to tell it about the internal attributes that this Drawable has. More...
 
virtual bool supports (const ConstAttributeFunctor &) const
 Return true if the Drawable subclass supports accept(ConstAttributeFunctor&). More...
 
virtual void accept (ConstAttributeFunctor &) const
 Accept an AttributeFunctor and call its methods to tell it about the internal attributes that this Drawable has. More...
 
virtual bool supports (const PrimitiveFunctor &) const
 Return true if the Drawable subclass supports accept(PrimitiveFunctor&). More...
 
virtual void accept (PrimitiveFunctor &) const
 Accept a PrimitiveFunctor and call its methods to tell it about the internal primitives that this Drawable has. More...
 
virtual bool supports (const PrimitiveIndexFunctor &) const
 Return true if the Drawable subclass supports accept(PrimitiveIndexFunctor&). More...
 
virtual void accept (PrimitiveIndexFunctor &) const
 Accept a PrimitiveIndexFunctor and call its methods to tell it about the internal primitives that this Drawable has. More...
 
- Public Member Functions inherited from osg::Object
 Object ()
 Construct an object. More...
 
 Object (bool threadSafeRefUnref)
 
 Object (const Object &, const CopyOp &copyop=CopyOp::SHALLOW_COPY)
 Copy constructor, optional CopyOp object can be used to control shallow vs deep copying of dynamic data. More...
 
virtual void setName (const std::string &name)
 Set the name of object using C++ style string. More...
 
void setName (const char *name)
 Set the name of object using a C style string. More...
 
const std::string & getName () const
 Get the name of object. More...
 
void setDataVariance (DataVariance dv)
 Set the data variance of this object. More...
 
DataVariance getDataVariance () const
 Get the data variance of this object. More...
 
void setUserDataContainer (osg::UserDataContainer *udc)
 set the UserDataContainer object. More...
 
osg::UserDataContainergetUserDataContainer ()
 get the UserDataContainer attached to this object. More...
 
const osg::UserDataContainergetUserDataContainer () const
 get the const UserDataContainer attached to this object. More...
 
osg::UserDataContainergetOrCreateUserDataContainer ()
 Convinience method that returns the UserDataContainer, and if one doesn't already exist creates and assigns a DefaultUserDataContainer to the Object and then return this new UserDataContainer. More...
 
virtual void setUserData (Referenced *obj)
 Set user data, data must be subclassed from Referenced to allow automatic memory handling. More...
 
virtual ReferencedgetUserData ()
 Get user data. More...
 
virtual const ReferencedgetUserData () const
 Get const user data. More...
 
template<typename T >
bool getUserValue (const std::string &name, T &value) const
 Convinience method that casts the named UserObject to osg::TemplateValueObject<T> and gets the value. More...
 
template<typename T >
void setUserValue (const std::string &name, const T &value)
 Convinience method that creates the osg::TemplateValueObject<T> to store the specified value and adds it as a named UserObject. More...
 
template<typename T >
BoolValueObject
UCharValueObject
UShortValueObject
UIntValueObject
DoubleValueObject
Vec3fValueObject
Vec2dValueObject
Vec4dValueObject
PlaneValueObject
MatrixdValueObject bool 
getUserValue (const std::string &name, T &value) const
 provide implementation of osg::Object::getUserValue(..) template More...
 
- Public Member Functions inherited from osg::Referenced
 Referenced ()
 
 Referenced (bool threadSafeRefUnref)
 
 Referenced (const Referenced &)
 
Referencedoperator= (const Referenced &)
 
bool getThreadSafeRefUnref () const
 Get whether a mutex is used to ensure ref() and unref() are thread safe. More...
 
OpenThreads::Mutex * getRefMutex () const
 Get the mutex used to ensure thread safety of ref()/unref(). More...
 
int ref () const
 Increment the reference count by one, indicating that this object has another pointer which is referencing it. More...
 
int unref () const
 Decrement the reference count by one, indicating that a pointer to this object is referencing it. More...
 
int unref_nodelete () const
 Decrement the reference count by one, indicating that a pointer to this object is referencing it. More...
 
int referenceCount () const
 Return the number of pointers currently referencing this object. More...
 
ObserverSetgetObserverSet () const
 Get the ObserverSet if one is attached, otherwise return NULL. More...
 
ObserverSetgetOrCreateObserverSet () const
 Get the ObserverSet if one is attached, otherwise create an ObserverSet, attach it, then return this newly created ObserverSet. More...
 
void addObserver (Observer *observer) const
 Add a Observer that is observing this object, notify the Observer when this object gets deleted. More...
 
void removeObserver (Observer *observer) const
 Remove Observer that is observing this object. More...
 

Protected Types

typedef std::vector< EdgeEdgeList
 
- Protected Types inherited from osg::Drawable
typedef osg::buffered_value
< GLuint > 
GLObjectList
 

Protected Member Functions

virtual ~OccluderGeometry ()
 
bool isLightPointSilhouetteEdge (const osg::Vec3 &lightpos, const Edge &edge) const
 
bool isLightDirectionSilhouetteEdge (const osg::Vec3 &lightdirection, const Edge &edge) const
 
void setUpInternalStructures ()
 
void removeDuplicateVertices ()
 
void removeNullTriangles ()
 
void computeNormals ()
 
void buildEdgeMaps ()
 
void computeLightDirectionSilhouetteEdges (const osg::Vec3 &lightdirection, UIntList &silhouetteIndices) const
 
void computeLightPositionSilhouetteEdges (const osg::Vec3 &lightpos, UIntList &silhouetteIndices) const
 
- Protected Member Functions inherited from osg::Drawable
Drawableoperator= (const Drawable &)
 
virtual ~Drawable ()
 
void setBound (const BoundingBox &bb) const
 set the bounding box . More...
 
void addParent (osg::Node *node)
 
void removeParent (osg::Node *node)
 
void setNumChildrenRequiringUpdateTraversal (unsigned int num)
 
unsigned int getNumChildrenRequiringUpdateTraversal () const
 
void setNumChildrenRequiringEventTraversal (unsigned int num)
 
unsigned int getNumChildrenRequiringEventTraversal () const
 
- Protected Member Functions inherited from osg::Object
virtual ~Object ()
 Object destructor. More...
 
- Protected Member Functions inherited from osg::Referenced
virtual ~Referenced ()
 
void signalObserversAndDelete (bool signalDelete, bool doDelete) const
 
void deleteUsingDeleteHandler () const
 

Protected Attributes

osg::Polytope _boundingPolytope
 
Vec3List _vertices
 
Vec3List _normals
 
Vec3List _triangleNormals
 
UIntList _triangleIndices
 
EdgeList _edges
 
- Protected Attributes inherited from osg::Drawable
ParentList _parents
 
ref_ptr< StateSet_stateset
 
BoundingBox _initialBound
 
ref_ptr
< ComputeBoundingBoxCallback
_computeBoundCallback
 
BoundingBox _boundingBox
 
bool _boundingBoxComputed
 
ref_ptr< Shape_shape
 
bool _supportsDisplayList
 
bool _useDisplayList
 
bool _supportsVertexBufferObjects
 
bool _useVertexBufferObjects
 
GLObjectList _globjList
 
ref_ptr< UpdateCallback_updateCallback
 
unsigned int _numChildrenRequiringUpdateTraversal
 
ref_ptr< EventCallback_eventCallback
 
unsigned int _numChildrenRequiringEventTraversal
 
ref_ptr< CullCallback_cullCallback
 
ref_ptr< DrawCallback_drawCallback
 
- Protected Attributes inherited from osg::Object
std::string _name
 
DataVariance _dataVariance
 
osg::UserDataContainer_userDataContainer
 
- Protected Attributes inherited from osg::Referenced
OpenThreads::AtomicPtr _observerSet
 
OpenThreads::Atomic _refCount
 

Additional Inherited Members

- Static Public Member Functions inherited from osg::Drawable
static GLuint generateDisplayList (unsigned int contextID, unsigned int sizeHint=0)
 Return a OpenGL display list handle a newly generated or reused from display list cache. More...
 
static void setMinimumNumberOfDisplayListsToRetainInCache (unsigned int minimum)
 Set the minimum number of display lists to retain in the deleted display list cache. More...
 
static unsigned int getMinimumNumberOfDisplayListsToRetainInCache ()
 Get the minimum number of display lists to retain in the deleted display list cache. More...
 
static void deleteDisplayList (unsigned int contextID, GLuint globj, unsigned int sizeHint=0)
 Use deleteDisplayList instead of glDeleteList to allow OpenGL display list to be cached until they can be deleted by the OpenGL context in which they were created, specified by contextID. More...
 
static void flushAllDeletedDisplayLists (unsigned int contextID)
 Flush all the cached display list which need to be deleted in the OpenGL context related to contextID. More...
 
static void discardAllDeletedDisplayLists (unsigned int contextID)
 Flush all the cached display list which need to be deleted in the OpenGL context related to contextID. More...
 
static void flushDeletedDisplayLists (unsigned int contextID, double &availableTime)
 Flush the cached display list which need to be deleted in the OpenGL context related to contextID. More...
 
static ExtensionsgetExtensions (unsigned int contextID, bool createIfNotInitalized)
 Function to call to get the extension of a specified context. More...
 
static void setExtensions (unsigned int contextID, Extensions *extensions)
 setExtensions allows users to override the extensions across graphics contexts. More...
 
- Static Public Attributes inherited from osg::Drawable
static unsigned int s_numberDrawablesReusedLastInLastFrame
 
static unsigned int s_numberNewDrawablesInLastFrame
 
static unsigned int s_numberDeletedDrawablesInLastFrame
 

Detailed Description

OccluderGeometry provides a sepecialised geometry representation of objects in scene that occlude light and therefore cast shadows.

OccluderGeometry supports the computation of silhouette edges and shadow volume geometries, as well as use as geometry that one can rendering into a shadow map or end caps for the ZP+ algorithm. OccluderGeometry may be of the same resolution as an underlying geometry that it represents, or can be of lower resolution and combine manager seperate geometries together into a single shadow casting object. OccluderGeometry may be attached as UserData to Nodes or to Drawables.

Member Typedef Documentation

typedef std::vector<Edge> osgShadow::OccluderGeometry::EdgeList
protected
typedef std::vector<GLuint> osgShadow::OccluderGeometry::UIntList

Constructor & Destructor Documentation

osgShadow::OccluderGeometry::OccluderGeometry ( )
osgShadow::OccluderGeometry::OccluderGeometry ( const OccluderGeometry oc,
const osg::CopyOp copyop = osg::CopyOp::SHALLOW_COPY 
)
virtual osgShadow::OccluderGeometry::~OccluderGeometry ( )
inlineprotectedvirtual

Member Function Documentation

void osgShadow::OccluderGeometry::buildEdgeMaps ( )
protected
virtual const char* osgShadow::OccluderGeometry::className ( ) const
inlinevirtual

return the name of the object's class type.

Must be defined by derived classes.

Reimplemented from osg::Drawable.

virtual Object* osgShadow::OccluderGeometry::clone ( const osg::CopyOp ) const
inlinevirtual

Clone an object, with Object* return type.

Must be defined by derived classes.

Implements osg::Object.

virtual Object* osgShadow::OccluderGeometry::cloneType ( ) const
inlinevirtual

Clone the type of an object, with Object* return type.

Must be defined by derived classes.

Implements osg::Object.

virtual osg::BoundingBox osgShadow::OccluderGeometry::computeBound ( ) const
virtual

Compute the bounding box around occluder geometry.

Reimplemented from osg::Drawable.

void osgShadow::OccluderGeometry::computeLightDirectionSilhouetteEdges ( const osg::Vec3 lightdirection,
UIntList silhouetteIndices 
) const
protected
void osgShadow::OccluderGeometry::computeLightPositionSilhouetteEdges ( const osg::Vec3 lightpos,
UIntList silhouetteIndices 
) const
protected
void osgShadow::OccluderGeometry::computeNormals ( )
protected
void osgShadow::OccluderGeometry::computeOccluderGeometry ( osg::Node subgraph,
osg::Matrix matrix = 0,
float  sampleRatio = 1.0f 
)

Compute an occluder geometry containing all the geometry in specified subgraph.

void osgShadow::OccluderGeometry::computeOccluderGeometry ( osg::Drawable drawable,
osg::Matrix matrix = 0,
float  sampleRatio = 1.0f 
)

Compute an occluder geometry containing the geometry in specified drawable.

void osgShadow::OccluderGeometry::computeShadowVolumeGeometry ( const osg::Vec4 lightpos,
ShadowVolumeGeometry svg 
) const
virtual void osgShadow::OccluderGeometry::drawImplementation ( osg::RenderInfo renderInfo) const
virtual

Render the occluder geometry.

Implements osg::Drawable.

osg::Polytope& osgShadow::OccluderGeometry::getBoundingPolytope ( )
inline

Get the bounding polytope of the OccluderGeometry.

const osg::Polytope& osgShadow::OccluderGeometry::getBoundingPolytope ( ) const
inline

Get the const bounding polytope of the OccluderGeometry.

bool osgShadow::OccluderGeometry::isLightDirectionSilhouetteEdge ( const osg::Vec3 lightdirection,
const Edge edge 
) const
inlineprotected
bool osgShadow::OccluderGeometry::isLightPointSilhouetteEdge ( const osg::Vec3 lightpos,
const Edge edge 
) const
inlineprotected
virtual bool osgShadow::OccluderGeometry::isSameKindAs ( const osg::Object obj) const
inlinevirtual

Reimplemented from osg::Drawable.

References NULL.

virtual const char* osgShadow::OccluderGeometry::libraryName ( ) const
inlinevirtual

return the name of the object's library.

Must be defined by derived classes. The OpenSceneGraph convention is that the namespace of a library is the same as the library name.

Reimplemented from osg::Drawable.

void osgShadow::OccluderGeometry::processGeometry ( osg::Drawable drawable,
osg::Matrix matrix = 0,
float  sampleRatio = 1.0f 
)
void osgShadow::OccluderGeometry::removeDuplicateVertices ( )
protected
void osgShadow::OccluderGeometry::removeNullTriangles ( )
protected
void osgShadow::OccluderGeometry::setBoundingPolytope ( const osg::Polytope polytope)
inline

Set the bounding polytope of the OccluderGeometry.

void osgShadow::OccluderGeometry::setUpInternalStructures ( )
protected

Member Data Documentation

osg::Polytope osgShadow::OccluderGeometry::_boundingPolytope
protected
EdgeList osgShadow::OccluderGeometry::_edges
protected
Vec3List osgShadow::OccluderGeometry::_normals
protected
UIntList osgShadow::OccluderGeometry::_triangleIndices
protected
Vec3List osgShadow::OccluderGeometry::_triangleNormals
protected
Vec3List osgShadow::OccluderGeometry::_vertices
protected

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

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Generated at Thu Feb 28 2013 21:37:31 for the OpenSceneGraph by doxygen 1.8.3.1.