C++ ArcGis 遍历polygon 的每个点。

最新推荐文章于 2024-08-19 09:09:25 发布

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本文详细介绍了如何使用C++和ArcGIS遍历polygon的每个点，包括获取几何图形数量、外环和内环点的提取及遍历。

C++ ArcGis 遍历polygon 的每个点。

代码实现：

IPolygon4Ptr ipPolygon(ipGeom);

IGeometryBagPtr exteriorRingGeometryBag = ipPolygon->GetExteriorRingBag();  
IGeometryCollectionPtr exteriorRingGeometryCollection(exteriorRingGeometryBag);

//  取几何图形的个数
long lRegionCount = exteriorRingGeometryCollection->GetGeometryCount();
for (int i = 0; i < lRegionCount; i++) 
{
IGeometryPtr exteriorRingGeometry = exteriorRingGeometryCollection->GetGeometry( i );
// 取外环的点
IPointCollectionPtr exteriorRingPointCollection( exteriorRingGeometry ); 
long lPointCount  =  exteriorRingPointCollection->GetPointCount();
for(  int j = 0;  j < lPointCount;  j++ ) 
{
IPointPtr ipPoint = exteriorRingPointCollection->GetPoint( j );
}

// 取内环的点
IRingPtr ipRing( exteriorRingGeometry );
IGeometryBagPtr interiorRingGeometryBag = ipPolygon->GetInteriorRingBag( ipRing );  
IGeometryCollectionPtr interiorRingGeometryCollection = ( IGeometryCollectionPtr )interiorRingGeometryBag;
long lInteriorCount = interiorRingGeometryCollection->GetGeometryCount();


for (int k = 0; k < lInteriorCount; k++)  
{
IGeometryPtr interiorRingGeometry = interiorRingGeometryCollection->GetGeometry(k);
IPointCollectionPtr interiorRingPointCollection( interiorRingGeometry);  
long lInteriorPointCount = interiorRingPointCollection->GetPointCount();
for (int m = 0; m < lInteriorPointCount; m++)  
                  {  
                         IPointPtr ipPoint = interiorRingPointCollection->GetPoint(m);
                  }  
}
}