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63 lines
1.9 KiB
C++
63 lines
1.9 KiB
C++
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#include "geospatialanalysis.h"
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#include <QMessageBox>
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GeoSpatialAnalysis::GeoSpatialAnalysis()
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{
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}
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/*@brief 两点间的可视性
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* @param pntView 观察点
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* @param pntObject 目标点
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*/
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UG3DAnalyst::SingleResult *GeoSpatialAnalysis::DoublePointVisibility(QMapControl* pMapControl,UGPoint2D pntView, UGPoint2D pntObject)
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{
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//通过下面的方法首先判断点所在的位置是否存在高程数据；
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UGDatasetRasterPtr viewPtDataset = pMapControl->getDemDataSet(pntView);
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UGDatasetRasterPtr objectPtDataset = pMapControl->getDemDataSet(pntObject);
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if(viewPtDataset == NULL || objectPtDataset == NULL)
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{
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QMessageBox::about(NULL,"提示","无高程数据 ");
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return NULL;//-1
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}
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if(viewPtDataset != objectPtDataset)
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{
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QMessageBox::about(NULL,"提示","观测点与被观测点不属于同一个高程数据集 ");
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return NULL;//-1
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}
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UGDatasetRasterPtr datasetRaster = viewPtDataset;
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//3D分析分析实例对象
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UG3DAnalyst visAnalsyt;
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UGPoint3D pntView3D,pntObject3D;
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//高程值需根据x,y查询数据集得到
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//得到当前测量点的高程值
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// 1.首先将坐标点转换为栅格数据集对应的行和列
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UGPoint pntviewImg;
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double altitude;
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datasetRaster->XYToImg(pntView,pntviewImg);
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altitude = datasetRaster->GetValue(pntviewImg.x,pntviewImg.y);
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pntView3D.x = pntView.x;
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pntView3D.y = pntView.y;
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pntView3D.z = altitude;
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UGPoint pntObjectImg;
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//坐标点转换为栅格数据集对应的行和列
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datasetRaster->XYToImg(pntObject,pntObjectImg);
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altitude = datasetRaster->GetValue(pntObjectImg.x,pntObjectImg.y);
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pntObject3D.x = pntObject.x;
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pntObject3D.y = pntObject.y;
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pntObject3D.z = altitude;
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//进行通视分析查询；
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UG3DAnalyst::SingleResult* result = visAnalsyt.IsVisible(datasetRaster,pntView3D,pntObject3D);
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return result;
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}
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