class SG_EXPORT osg::ImpostorSprite

An ImposterSprite is a textured quad which is rendered in place a 3D geometry.

Inheritance:

Public Fields
Vec4 _color

Public Methods
ImpostorSprite()
virtual Object* cloneType() const: Clone an object of the same type as an ImpostorSprite
virtual Object* clone(const CopyOp&) const: Clone on ImpostorSprite just returns a clone of type, since it is not appropriate to share data of an ImpostorSprite
virtual bool isSameKindAs(const Object* obj) const
virtual const char* libraryName() const
virtual const char* className() const
void setParent(Impostor* parent): Set the parent, which must be an Impostor.
Impostor* getParent(): Get the parent, which is an Impostor.
const Impostor* getParent() const: Get the const parent, which is an Impostor.
inline void setStoredLocalEyePoint(const Vec3& v): Set the eye point for when the ImpsotorSprite was snapped
inline const Vec3& getStoredLocalEyePoint() const: Get the eye point for when the ImpsotorSprite was snapped
inline void setLastFrameUsed(int frameNumber): Set the frame number for when the ImpostorSprite was last used in rendering
inline int getLastFrameUsed() const: Get the frame number for when the ImpostorSprite was last used in rendering
inline Vec3* getCoords(): Get the coordinates of the corners of the quad.
inline const Vec3* getCoords() const: Get the const coordinates of the corners of the quad
inline Vec2* getTexCoords(): Get the texture coordinates of the corners of the quad.
inline const Vec2* getTexCoords() const: Get the const texture coordinates of the corners of the quad
inline Vec3* getControlCoords(): Get the control coordinates of the corners of the quad.
inline const Vec3* getControlCoords() const: Get the const control coordinates of the corners of the quad
float calcPixelError(const Matrix& MVPW) const: calculate the pixel error value for passing in the ModelViewProjectionWindow transform, which transform local coords into screen space
void setTexture(Texture2D* tex, int s, int t)
Texture2D* getTexture()
const Texture2D* getTexture() const
int s() const
int t() const
virtual void drawImplementation(State& state) const: draw ImpostorSprite directly.
virtual bool supports(AttributeFunctor&) const: return true, osg::ImpostorSprite does support accept(AttributeFunctor&)
virtual void accept(AttributeFunctor& af): accept an AttributeFunctor and call its methods to tell it about the interal attributes that this Drawable has
virtual bool supports(ConstAttributeFunctor&) const: return true, osg::ImpostorSprite does support accept(ConstAttributeFunctor&)
virtual void accept(ConstAttributeFunctor& af) const: accept an ConstAttributeFunctor and call its methods to tell it about the interal attributes that this Drawable has
virtual bool supports(PrimitiveFunctor&) const: return true, osg::ImpostorSprite does support accept(PrimitiveFunctor&)
virtual void accept(PrimitiveFunctor& pf) const: accept a PrimtiveFunctor and call its methods to tell it about the interal primtives that this Drawable has

Protected Fields
Impostor* _parent
ImpostorSpriteManager* _ism
ImpostorSprite* _previous
ImpostorSprite* _next
int _lastFrameUsed
Vec3 _storedLocalEyePoint
Vec3 _coords[4]
Vec2 _texcoords[4]
Vec3 _controlcoords[4]
Texture2D* _texture
int _s
int _t

Protected Methods
ImpostorSprite(const ImpostorSprite&)
ImpostorSprite& operator = (const ImpostorSprite&)
virtual ~ImpostorSprite()
virtual bool computeBound() const

Inherited from Drawable:

Public Methods
virtual Geometry* asGeometry()
virtual const Geometry* asGeometry() const
inline const ParentList& getParents() const
inline ParentList getParents()
inline unsigned int getNumParents() const
inline void setStateSet(StateSet* state)
inline StateSet* getStateSet()
inline const StateSet* getStateSet() const
StateSet* getOrCreateStateSet()
void dirtyBound()
inline const BoundingBox& getBound() const
inline void setShape(Shape* shape)
inline Shape* getShape()
inline const Shape* getShape() const
void setSupportsDisplayList(bool flag)
inline bool getSupportsDisplayList() const
void setUseDisplayList(bool flag)
inline bool getUseDisplayList() const
void dirtyDisplayList()
virtual void compile(State& state) const
void setUpdateCallback(UpdateCallback* ac)
UpdateCallback* getUpdateCallback()
void setAppCallback(AppCallback* ac)
AppCallback* getAppCallback()
const AppCallback* getAppCallback() const
void setCullCallback(CullCallback* cc)
CullCallback* getCullCallback()
const CullCallback* getCullCallback() const
void setDrawCallback(DrawCallback* dc)
DrawCallback* getDrawCallback()
const DrawCallback* getDrawCallback() const
static void deleteDisplayList(uint contextID, uint globj)
static void flushDeletedDisplayLists(uint contextID)
inline void draw(State& state) const

Public Members
typedef std::vector<Node*> ParentList
struct UpdateCallback: public virtual osg::Referenced
struct AppCallback: public UpdateCallback
struct CullCallback: public virtual osg::Referenced
struct DrawCallback: public virtual osg::Referenced
enum AttributeType
class AttributeFunctor
class ConstAttributeFunctor
class PrimitiveFunctor

Protected Fields
ParentList _parents
ref_ptr<StateSet> _stateset
mutable BoundingBox _bbox
mutable bool _bbox_computed
ref_ptr<Shape> _shape
bool _supportsDisplayList
bool _useDisplayList
mutable GLObjectList _globjList
ref_ptr<UpdateCallback> _updateCallback
ref_ptr<DrawCallback> _drawCallback
ref_ptr<CullCallback> _cullCallback

Protected Methods
void addParent(osg::Node* node)
void removeParent(osg::Node* node)

Protected Members
typedef osg::buffered_value<uint> GLObjectList

Inherited from Object:

Public Methods
inline void setDataVariance(DataVariance dv)
inline DataVariance getDataVariance() const
inline void setUserData(Referenced* obj)
inline Referenced* getUserData()
inline const Referenced* getUserData() const

Public Members
enum DataVariance

Protected Fields
DataVariance _dataVariance
ref_ptr<Referenced> _userData

Inherited from Referenced:

Public Methods
static void setDeleteHandler(DeleteHandler* handler)
static DeleteHandler* getDeleteHandler()
inline void ref() const
inline void unref_nodelete() const
inline int referenceCount() const
inline void unref() const

Protected Fields
mutable int _refCount

Documentation

An ImposterSprite is a textured quad which is rendered in place a 3D geometry. The ImposterSprite is generated by rendering the original 3D geometry to a texture as an image cache. The ImpostorSprite is automatically generated by the osgUtil::CullVisitor so it not necessary to deal with it directly.

ImpostorSprite()

virtual Object* cloneType() const

Clone an object of the same type as an ImpostorSprite

virtual Object* clone(const CopyOp&) const

Clone on ImpostorSprite just returns a clone of type, since it is not appropriate to share data of an ImpostorSprite

virtual bool isSameKindAs(const Object* obj) const

virtual const char* libraryName() const

virtual const char* className() const

void setParent(Impostor* parent)

Set the parent, which must be an Impostor. Unlike conventional Drawables, ImpostorSprite's can only ever have one parent.

Impostor* getParent()

Get the parent, which is an Impostor.

const Impostor* getParent() const

Get the const parent, which is an Impostor.

inline void setStoredLocalEyePoint(const Vec3& v)

Set the eye point for when the ImpsotorSprite was snapped

inline const Vec3& getStoredLocalEyePoint() const

Get the eye point for when the ImpsotorSprite was snapped

inline void setLastFrameUsed(int frameNumber)

Set the frame number for when the ImpostorSprite was last used in rendering

inline int getLastFrameUsed() const

Get the frame number for when the ImpostorSprite was last used in rendering

inline Vec3* getCoords()

Get the coordinates of the corners of the quad. Stored in the order, [0] - top_left, [1] - bottom_left, [2] - bottom_right, [3] - top_left.

inline const Vec3* getCoords() const

Get the const coordinates of the corners of the quad

inline Vec2* getTexCoords()

Get the texture coordinates of the corners of the quad. Stored in the order, [0] - top_left, [1] - bottom_left, [2] - bottom_right, [3] - top_left.

inline const Vec2* getTexCoords() const

Get the const texture coordinates of the corners of the quad

inline Vec3* getControlCoords()

Get the control coordinates of the corners of the quad. The control coordinates are the corners of the quad projected out onto the front face of bounding box which enclosed the impostor geometry when it was pre-rendered into the impostor sprite's texture. At the point of creation/or update of the impostor sprite the control coords will lie on top of the corners of the quad in screen space - with a pixel error or zero. Once the camera moves relative to the impostor sprite the control coords will no longer lie on top of the corners of the quad in screen space - a pixel error will have accumulated. This pixel error can then be used to determine whether the impostor needs to be updated. Stored in the order, [0] - top_left, [1] - bottom_left, [2] - bottom_right, [3] - top_left.

inline const Vec3* getControlCoords() const

Get the const control coordinates of the corners of the quad

float calcPixelError(const Matrix& MVPW) const

calculate the pixel error value for passing in the ModelViewProjectionWindow transform, which transform local coords into screen space

void setTexture(Texture2D* tex, int s, int t)

Texture2D* getTexture()

const Texture2D* getTexture() const

int s() const

int t() const

virtual void drawImplementation(State& state) const

draw ImpostorSprite directly.

virtual bool supports(AttributeFunctor&) const

return true, osg::ImpostorSprite does support accept(AttributeFunctor&)

virtual void accept(AttributeFunctor& af)

accept an AttributeFunctor and call its methods to tell it about the interal attributes that this Drawable has

virtual bool supports(ConstAttributeFunctor&) const

return true, osg::ImpostorSprite does support accept(ConstAttributeFunctor&)

virtual void accept(ConstAttributeFunctor& af) const

accept an ConstAttributeFunctor and call its methods to tell it about the interal attributes that this Drawable has

virtual bool supports(PrimitiveFunctor&) const

return true, osg::ImpostorSprite does support accept(PrimitiveFunctor&)

virtual void accept(PrimitiveFunctor& pf) const

accept a PrimtiveFunctor and call its methods to tell it about the interal primtives that this Drawable has

Vec4 _color

ImpostorSprite(const ImpostorSprite&)

ImpostorSprite& operator = (const ImpostorSprite&)

virtual ~ImpostorSprite()

virtual bool computeBound() const

Impostor* _parent

ImpostorSpriteManager* _ism

ImpostorSprite* _previous

ImpostorSprite* _next

int _lastFrameUsed

Vec3 _storedLocalEyePoint

Vec3 _coords[4]

Vec2 _texcoords[4]

Vec3 _controlcoords[4]

Texture2D* _texture

int _s

int _t

This class has no child classes.


Friends:: class osg::ImpostorSpriteManager

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