/// <summary>
/// 主多边形上找到一个顶点，不在diff多边形内的。
/// </summary>
/// <param name="mainPoly"></param>
/// <param name="diffpoly"></param>
/// <param name="poly"></param>
/// <param name="curedge"></param>
public static bool FindOutDiffPointPoint(Polygon2D mainPoly, Polygon2D diffpoly, ref Double2 curPoint, ref int curedge)
{
if (mainPoly == null || diffpoly == null || mainPoly.GetEdgeNum() < 3 || diffpoly.GetEdgeNum() < 3)
{
return(false);
}
for (int i = 0; i < mainPoly.GetEdgeNum(); i++)
{
Double2 point = mainPoly.GetPoint(i);
if (diffpoly.CheckIn(point) == false)
{
curPoint = point;
curedge = i;
return(true);
}
}
return(false);
}
/// <summary>
/// 与多边形的关系
/// </summary>
/// <param name="ab"></param>
/// <returns>true 相交： false 不相交</returns>
public override bool CheckIntersect(Polygon2D ab)
{
if (ab == null)
{
return(false);
}
if (ab.CheckIn(this.circleCenter) == true)
{
return(true);
}
for (int i = 0; i < ab.GetEdgeNum(); i++)
{
LineSegment2D ls = ab.GetEdge(i);
if (this.CheckLineRelation(ls) != LineRelation.Detach)
{
return(true);
}
}
return(false);
}