private bool HitTestForOutLine(System.Drawing.PointF[] points, Point hitPoint)
{
bool retVal = false;
for (int i = 0; i < HandleCount - 1; i++)
{
// Create path which contains wide line
// for easy mouse selection
GraphicsPath areaPath1 = new GraphicsPath();
System.Drawing.Pen AreaPen1 = new System.Drawing.Pen(System.Drawing.Color.Black, 2);
areaPath1.AddLine(points[i].X, points[i].Y, points[i + 1].X, points[i + 1].Y);
areaPath1.Widen(AreaPen1);
// Create region from the path
System.Drawing.Region areaRegion = new System.Drawing.Region(areaPath1);
System.Drawing.Point hPoint = new System.Drawing.Point(hitPoint.X, hitPoint.Y);
retVal = areaRegion.IsVisible(hPoint);
InsertAt = i + 1;
_pointToInsert = new Point(hitPoint.X, hitPoint.Y);
if (retVal)
{
break;
}
}
return(retVal);
}
/// <summary>
/// 点在区域中是否可见（现已废弃，替代方法 PointInPolygon）
/// </summary>
/// <param name="point"></param>
/// <param name="pointColl"></param>
/// <returns></returns>
public static bool IsVisible_Region(Point point, List <Point> pointColl)
{
System.Drawing.Drawing2D.GraphicsPath path = new System.Drawing.Drawing2D.GraphicsPath();
System.Drawing.Region region = new System.Drawing.Region();
List <System.Drawing.Point> pathPoints = new List <System.Drawing.Point>();
foreach (var pathPoint in pointColl)
{
pathPoints.Add(new System.Drawing.Point((int)Math.Round(pathPoint.X), (int)Math.Round(pathPoint.Y)));
}
path.AddPolygon(pathPoints.ToArray());
path.CloseFigure();
region.MakeEmpty();
region.Union(path);
return(region.IsVisible(new System.Drawing.Point((int)Math.Round(point.X), (int)Math.Round(point.Y))));
}
