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SDTSRawPolygon Class Reference

#include <sdts_al.h>

Inheritance diagram for SDTSRawPolygon:

List of all members.

Public Methods
int	AssembleRings ()
virtual void	Dump (FILE *)
Public Attributes
int	nRings
int	nVertices
int *	panRingStart
double *	padfX
double *	padfY
double *	padfZ

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Detailed Description

Class for holding information about a polygon feature.

When directly read from a polygon module, the polygon has no concept of it's geometry. Just it's ID, and references to attribute records. However, if the SDTSLineReader::AttachToPolygons() method is called on the module containing the lines forming the polygon boundaries, then the nEdges/papoEdges information on the SDTSRawPolygon will be filled in.

Once this is complete the AssembleRings() method can be used to fill in the nRings/nVertices/panRingStart/padfX/padfY/padfZ information defining the ring geometry.

Note that the rings may not appear in any particular order, nor with any meaningful direction (clockwise or counterclockwise).

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Member Function Documentation

int SDTSRawPolygon::AssembleRings (    )

This method will assemble the edges associated with a polygon into rings, returning FALSE if problems are encountered during assembly.

void SDTSRawPolygon::Dump (  FILE *    )  [virtual]

Dump reable description of feature to indicated stream. Implements SDTSFeature.

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Member Data Documentation

int SDTSRawPolygon::nRings

Number of rings in assembled polygon.

int SDTSRawPolygon::nVertices

Total number of vertices in all rings of assembled polygon.

double* SDTSRawPolygon::padfX

List of nVertices X coordinates for the polygon (split over multiple rings via panRingStart.

double* SDTSRawPolygon::padfY

List of nVertices Y coordinates for the polygon (split over multiple rings via panRingStart.

double* SDTSRawPolygon::padfZ

List of nVertices Z coordinates for the polygon (split over multiple rings via panRingStart. The values are almost always zero.

int* SDTSRawPolygon::panRingStart

Offsets into padfX/padfY/padfZ for the beginning of each ring in the polygon. This array is nRings long.

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The documentation for this class was generated from the following files:

• sdts_al.h
• sdtspolygonreader.cpp

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