class SG_EXPORT osg::ImpostorSprite

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

Inheritance:

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()

void compile(State& state)

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)

Public Members

typedef std::vector<Node*> ParentList

struct AppCallback: public osg::Referenced

struct CullCallback: public osg::Referenced

struct DrawCallback: public 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<AppCallback> _appCallback

ref_ptr<DrawCallback> _drawCallback

ref_ptr<CullCallback> _cullCallback

static DeletedDisplayListCache s_deletedDisplayListCache

Protected Methods

void addParent(osg::Node* node)

void removeParent(osg::Node* node)

Protected Members

typedef std::vector<uint> GLObjectList

typedef std::map<uint,std::set<uint> > DeletedDisplayListCache

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

inline void ref() const

inline void unref() const

inline void unref_nodelete() const

inline int referenceCount() const

inline static int createdCount()

inline static int deletedCount()

Protected Fields

mutable int _refCount

static int _createdCount

static int _deletedCount

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

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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