IRegion2D Interface Reference

Region in two-dimensional space. More...

Public Member Functions
HRESULT	GetContour ([in] int index, [out, retval] ICurve2D **ppContour2D)
	Returns the contour by the index. The outer contour is always at index 0.
HRESULT	GetContourCount ([out, retval] int *pCount)
	The number of contours including the outer contour.
HRESULT	GetOuterContour ([out, retval] ICurve2D **ppContour2D)
	Returns the outer contour of the region.

Detailed Description

Region in two-dimensional space.

A region represents a connected set of two-dimensional points, which boundaries are described by contours. Contours of the region are represented by polycurves which are closed and not self-intersected (but there may be self-contacts). In arbitrary region there is only one outer contour (positive traverse of outer contour is performed counterclockwise) and several inner contour (positive traverse of inner contour is performed clockwise) which are completely located inside outer contour (or may contact it).

See also

IPolyCurve2D

Member Function Documentation

GetContour()

HRESULT GetContour	(	[in] int	index,
		[out, retval] ICurve2D **	ppContour2D )

Returns the contour by the index. The outer contour is always at index 0.

Use cast to IPolyCurve2D interface to decompose the returned contour into segments.

GetOuterContour()

HRESULT GetOuterContour

(

[out, retval] ICurve2D **

ppContour2D

)

Returns the outer contour of the region.

Use cast to IPolyCurve2D interface to decompose the returned contour into segments.