/// <summary>
/// 判断一个多边形是否完全位于矩形盒内
/// </summary>
/// <param name="polygon"></param>
/// <param name="box"></param>
/// <returns></returns>
public static bool IsPolygonCompleteInBox(MyMultiPolygon polygon, MyRectangle box)
{
int sPointCount = polygon.PointCount;
for (int i = 0; i < sPointCount; i++)
{
MyPoint pointXY = ETCProjection.LngLat2XY(polygon.Points[i]); //投影坐标系下的坐标
if (IsPointInBox(pointXY, box) == false)
{
return(false);
}
}
return(true);
}
/// <summary>
/// 返回一个此MultiPolygon对象的副本
/// </summary>
/// <returns></returns>
public MyMultiPolygon Clone()
{
MyMultiPolygon copy = new MyMultiPolygon();
copy.polygonCount = this.polygonCount;
copy.selected = this.selected;
for (int i = 0; i < this.points.Count; i++)
{
copy.points.Add(new MyPoint(this.points[i].X, this.points[i].Y));
}
copy.firstIndex = new int[this.firstIndex.Length];
for (int i = 0; i < this.firstIndex.Length; i++)
{
copy.firstIndex[i] = this.firstIndex[i];
}
copy.isIsland = new bool[this.isIsland.Length];
for (int i = 0; i < this.firstIndex.Length; i++)
{
copy.isIsland[i] = this.isIsland[i];
}
return(copy);
}
/// <summary>
/// 添加指定复合多边形对象
/// </summary>
/// <param name="geo">复合多边形对象</param>
/// <returns>是否成功添加</returns>
internal override bool AddGeoObj(object geo)
{
try
{
MyMultiPolygon polygon = (MyMultiPolygon)geo;
if (polygons.Count == 0)
{
polygon.FID = 0;
}
else
{
polygon.FID = polygons[polygons.Count - 1].FID + 1;
}
polygons.Add(polygon);
//调整minx,maxx,miny,maxy
if (polygon.MaxX > this.maxX)
{
this.maxX = polygon.MaxX;
}
if (polygon.MinX < this.minX)
{
this.minX = polygon.MinX;
}
if (polygon.MaxY > this.maxY)
{
this.maxY = polygon.MaxY;
}
if (polygon.MinY < this.minY)
{
this.minY = polygon.MinY;
}
return(true);
}
catch (Exception)
{
return(false);
}
}