//判断点是否在区域内
public bool IfPointInRegion(TopoPoint todeterPoint)
{
TopoPoint[] points = this.ConvertToPointArray();
TopoPoint rayPoint = new TopoPoint(todeterPoint.X * 2, todeterPoint.Y, todeterPoint.Z, false);
int intersectCount = 0;
for (int i = 0; i < points.Length - 1; i++)
{
if (TopoPolygon.IntersectPoint(points[i], points[i + 1], todeterPoint, rayPoint) == true)
{
intersectCount++;
}
}
return(intersectCount / 2 != 0);
}
/// <summary>
/// 根据点的拓扑关系，生成多边形的拓扑关系
/// </summary>
/// <returns></returns>
public TopoPolygonSet GenerateTopoPolygonSet()
{
List <TopoPolygon> polygonList = new List <TopoPolygon>();
foreach (var tpPoint in this.TopoNodeList)
{
List <Tuple <TopoPoint, double, double, int, TopoPolyline> > curPointStructList =
new List <Tuple <TopoPoint, double, double, int, TopoPolyline> >();
List <TopoPolyline> relaArcs = tpPoint.TopologyArcs;
foreach (var arc in relaArcs)
{
int direct = arc.IsNode(tpPoint);
double angle = -1;
double otherNodeAngle = -2;
switch (direct)
{
case 1:
angle = arc.GetBeginNodeAngle();
otherNodeAngle = arc.GetEndNodeAngle();
break;
case -1:
angle = arc.GetEndNodeAngle();
otherNodeAngle = arc.GetBeginNodeAngle();
break;
default:
break;
}
Tuple <TopoPoint, double, double, int, TopoPolyline> curPointStruct
= new Tuple <TopoPoint, double, double, int, TopoPolyline>(arc.GetAnotherNode(tpPoint), angle, otherNodeAngle, direct, arc);
curPointStructList.Add(curPointStruct);
}
List <TopoPolyline> curPolygon = new List <TopoPolyline>();
List <int> directList = new List <int>();
foreach (var pointStruct in curPointStructList)
{
var iterationTuple = pointStruct;
while (iterationTuple.Item1.PointID != tpPoint.PointID)
{
curPolygon.Add(iterationTuple.Item5);
directList.Add(iterationTuple.Item4);
iterationTuple = this.GetNextNode(iterationTuple);
}
curPolygon.Add(iterationTuple.Item5);
directList.Add(iterationTuple.Item4);
//追踪成功
if (curPolygon.Count > 0)
{
TopoPolygon tempPolygon = new TopoPolygon(curPolygon.ToArray());
for (int i = 0; i < directList.Count; i++)
{
if (directList[i] > 0)
{
curPolygon[i].RightPolygon = tempPolygon;
}
else if (directList[i] < 0)
{
curPolygon[i].LeftPolygon = tempPolygon;
}
}
polygonList.Add(tempPolygon);
curPolygon = new List <TopoPolyline>();
directList = new List <int>();
}
}
}
return(new TopoPolygonSet(polygonList.ToArray()));
}
