vtFeatureSetPolygon Class Reference

Inheritance diagram for vtFeatureSetPolygon:

[legend]List of all members.

Public Member Functions
unsigned int	GetNumEntities () const
void	SetNumGeometries (int iNum)
void	Reserve (int iNum)
bool	ComputeExtent (DRECT &rect) const
void	Offset (const DPoint2 &p, bool bSelectedOnly=false)
bool	TransformCoords (OCT *pTransform, bool progress_callback(int)=0)
bool	AppendGeometryFrom (vtFeatureSet *pFromSet)
int	AddPolygon (const DPolygon2 &poly)
void	SetPolygon (unsigned int num, const DPolygon2 &poly)
const DPolygon2 &	GetPolygon (unsigned int num) const
DPolygon2 &	GetPolygon (unsigned int num)
int	FindSimplePolygon (const DPoint2 &p) const
int	FindPolygon (const DPoint2 &p) const
void	CreateIndex (int iSize)
void	FreeIndex ()
virtual bool	IsInsideRect (int iElem, const DRECT &rect)
virtual void	CopyGeometry (unsigned int from, unsigned int to)
virtual void	SaveGeomToSHP (SHPHandle hSHP, bool progress_callback(int)=0) const
virtual void	LoadGeomFromSHP (SHPHandle hSHP, bool progress_callback(int)=0)
Protected Attributes
DPolyArray	m_Poly
SpatialIndex *	m_pIndex

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Detailed Description

A set of polygon features. Each polygon is a DPolygon2 object, which consists of a number of rings: one external ring, and any number of internal rings (holes).

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Member Function Documentation

int vtFeatureSetPolygon::FindPolygon (  const DPoint2 &  p  )  const

Find the first polygon in this feature set which contains the given point. The index of the polygon is return, or -1 if no polygon was found.

int vtFeatureSetPolygon::FindSimplePolygon (  const DPoint2 &  p  )  const

Find the first polygon in this feature set which contains the given point. This method makes the simplification assumption that none of the polygons have holes. The index of the polygon is return, or -1 if no polygon was found.

void vtFeatureSetPolygon::Reserve (  int  iNum  )  [virtual]

If you know how many entities you will be adding to this FeatureSet, is it more efficient to reserve space for that many. Implements vtFeatureSet.

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