Envelope 转为Polygon

2024-07-24 13:35:59 221人阅读

IEnvelopePtr ipEnv ;

hr = m_ipMapCtrl ->TrackRectangle(& ipEnv);

IPointPtr ipPointUL ;

IPointPtr ipPointUR ;

IPointPtr ipPointLL ;

IPointPtr ipPointLR ;

ipEnv->get_UpperLeft (&ipPointUL);

ipEnv->get_UpperRight (&ipPointUR);

ipEnv->get_LowerLeft (&ipPointLL);

ipEnv->get_LowerRight (&ipPointLR);

IPointCollectionPtr ipPointCollection (CLSID_Polygon);

ipPointCollection->AddPoint (ipPointUL);

ipPointCollection->AddPoint (ipPointLL);

ipPointCollection->AddPoint (ipPointLR);

ipPointCollection->AddPoint (ipPointUR);

ipGeo=ipPointCollection ;

Envelope 转为Polygon

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