RiProjectedAreaCluster Documentation

This class holds a cube representing the projected area in each direction. Each cube face has 9 cells on it. When an object is added to the cluster, each cell has the projected area in its direction incremented appropriately.

RiProjectedAreaCluster();

Default Constructor

    RiProjectedAreaCluster();

RiReal GetSample(RiRadRegion &sample, const RiVector2 &uv);

Fills in the data in sample, and returns the Area Weight for the sample (area of the object.

    virtual RiReal GetSample(RiRadRegion &sample, const RiVector2 &uv);

RiReal GetFormFactorSample(RiRadRegion &sample, const RiMaterialRegion &interestedSample, const RiVector2 &uv);

Fills in the data in sample, and returns the Form Factor weight for the sample to the interestedSample. interestedSample is used to direct the object so that it will hopefully pick a point visible to the intersted point, reducing variance.

    virtual RiReal GetFormFactorSample(RiRadRegion &sample, const RiMaterialRegion &interestedSample,
				       const RiVector2 &uv);

RiRadData *GetRadData();

Get the Rad Data from the object

    virtual RiRadData  *GetRadData();

RiConvexHull GetConvexHull();

Get a convex hull containing the object

    virtual RiConvexHull GetConvexHull();

bool IsVisible(const RiConvexHull &hull);

Can the object see the convex hull. Note that this operation ONLY involves the object and the hull, not the environment. This is the equivalent of back face culling.

    virtual bool	 IsVisible(const RiConvexHull &hull);

void ComputeTransfer(const RiMaterialRegion &sample, RiTransferData &data);

Compute transfer data for links and lighting

    virtual void	 ComputeTransfer(const RiMaterialRegion &sample, RiTransferData &data);

int GetNumChildren();

Determine the number of children this object has. (0 if no subdivision has been done

    virtual int		 GetNumChildren();

RiRadObject *GetChild(int i);

Get the ith child (i MUST be less than GetNumChildren)

    virtual RiRadObject *GetChild(int i);

bool Subdivide();

Subdivide if possible. If already subdivided, do nothing. Return true if subdividable.

    virtual bool	 Subdivide();

RiReal GetArea();

Compute the surface area (or a good estimate of it) of the object

    virtual RiReal	 GetArea();

void AddRadObject(RiRadObject *obj);

Add an object to the list.

    void AddRadObject(RiRadObject *obj);

void AddProjectedAreaObject(RiProjectedAreaCluster *obj);

Allow building of hierarchy

    void AddProjectedAreaObject(RiProjectedAreaCluster *obj);

All Members

public:

	// Members
RiReal	GetSample(RiRadRegion &sample, const RiVector2 &uv);	// pure virtual
RiReal	GetFormFactorSample(RiRadRegion &sample, const RiMaterialRegion &interestedSample, const RiVector2 &uv);
void	ComputeTransfer(const RiMaterialRegion &sample, RiTransferData &data);	// pure virtual
RiRadData *	GetRadData();	// pure virtual
RiConvexHull	GetConvexHull();	// pure virtual
bool	IsVisible(const RiConvexHull &hull);	// pure virtual

	// Structural
int	GetNumChildren();	// pure virtual
RiRadObject *	GetChild(int i);	// pure virtual
bool	Subdivide();	// pure virtual
RiReal	GetArea();	// pure virtual
RiRadObject *	GetRadObject(const RiMaterialRegion &sample);
void	SetParent(RiRadObject *obj);
RiRadObject *	GetParent();

	// Structural
void	AddRadObject(RiRadObject *obj);
void	AddProjectedAreaObject(RiProjectedAreaCluster *obj);
protected:

Ancestors

Inheritance chain for RiProjectedAreaCluster:

RiRadObject

Descendants

Class is not inherited by any others.

Generated from source by the Cocoon utilities on Fri Feb 25 15:15:45 2000 .