/// <summary>
/// 根据指定点搜索要素
/// </summary>
/// <param name="point"></param>
/// <param name="tolerance"></param>
/// <returns></returns>
public moFeatures SearchFeaturesByPoint(moPoint point, double tolerance)
{
moFeatures sSelectedFeatures = new moFeatures();
Int32 sFeatureCount = _Features.Count;
for (Int32 i = 0; i <= sFeatureCount - 1; i++)
{
if (_ShapeType == moGeometryTypeConstant.Point)
{
moPoint sPoint = (moPoint)_Features.GetItem(i).Geometry;
if (moMapTools.IsPointOnPoint(point, sPoint, tolerance) == true)
{
sSelectedFeatures.Add(_Features.GetItem(i));
}
}
else if (_ShapeType == moGeometryTypeConstant.MultiPolyline)
{
moMultiPolyline sMultiPolyline = (moMultiPolyline)_Features.GetItem(i).Geometry;
if (moMapTools.IsPointOnMultiPolyline(point, sMultiPolyline, tolerance) == true)
{
sSelectedFeatures.Add(_Features.GetItem(i));
}
}
else if (_ShapeType == moGeometryTypeConstant.MultiPolygon)
{
moMultiPolygon sMultiPolygon = (moMultiPolygon)_Features.GetItem(i).Geometry;
if (moMapTools.IsPointWithinMultiPolygon(point, sMultiPolygon) == true)
{
sSelectedFeatures.Add(_Features.GetItem(i));
}
}
}
return(sSelectedFeatures);
}
/// <summary>
///
/// </summary>
/// <param name="selectingBox"></param>
/// <returns></returns>
private moFeatures SearchFeaturesByBox(moRectangle selectingBox)
{
moFeatures sSelectedFeatures = new moFeatures();
Int32 sFeatureCount = _Features.Count;
for (Int32 i = 0; i <= sFeatureCount - 1; i++)
{
if (_ShapeType == moGeometryTypeConstant.Point)
{
moPoint sPoint = (moPoint)_Features.GetItem(i).Geometry;
if (moMapTools.IsPointWithinBox(sPoint, selectingBox) == true)
{
sSelectedFeatures.Add(_Features.GetItem(i));
}
}
else if (_ShapeType == moGeometryTypeConstant.MultiPolyline)
{
moMultiPolyline sMultiPolyline = (moMultiPolyline)_Features.GetItem(i).Geometry;
if (moMapTools.IsMultiPolylinePartiallyWithinBox(sMultiPolyline, selectingBox) == true)
{
sSelectedFeatures.Add(_Features.GetItem(i));
}
}
else if (_ShapeType == moGeometryTypeConstant.MultiPolygon)
{
moMultiPolygon sMultiPolygon = (moMultiPolygon)_Features.GetItem(i).Geometry;
if (moMapTools.IsMultiPolygonPartiallyWithinBox(sMultiPolygon, selectingBox) == true)
{
sSelectedFeatures.Add(_Features.GetItem(i));
}
}
}
return(sSelectedFeatures);
}
/// <summary>
/// 根据指定方法执行选择，selectMethod即新建、求差、求交等
/// </summary>
/// <param name="features"></param>
/// <param name="selectMethod"></param>
public void ExecuteSelect(moFeatures features, Int32 selectMethod)
{
//说明：此处仅考虑新建集合
if (selectMethod == 0)
{
_SelectedFeatures.Clear();
Int32 sFeatureCount = features.Count;
for (Int32 i = 0; i < sFeatureCount; i++)
{
_SelectedFeatures.Add(features.GetItem(i));
}
}
else
{
throw new NotFiniteNumberException();
}
}
