public bool IsPointSetCross(Point2DString pSet)
{
double delta = 0.1;
for (double d = 0; d < pSet.Count - 1 + delta; d += delta)
{
if (this.IsPointIn(pSet[d]))
{
return(true);
}
}
return(false);
}
public Point2DString GetOffset(double offset)
{
List <Point2D> listPt = new List <Point2D>();
if (points.Count <= 0)
{
//return null;
}
else if (points.Count == 1)
{
Point2D pt = new Point2D(points[0].x + offset, points[0].y);
listPt.Add(pt);
}
else if (points.Count == 2)
{
listPt = GetOffsetSeg(points[0], points[1], offset);
}
else
{
Point2D pt1 = GetOffsetSeg(points[0], points[1], offset)[0];
listPt.Add(pt1);
for (int count = 1; count <= points.Count - 1; count++)
{
if (count == points.Count - 1)
{
Point2D pt = GetOffsetSeg(points[count - 1], points[count], offset)[1];
listPt.Add(pt);
}
else
{
Point2D p10 = GetOffsetSeg(points[count - 1], points[count], offset)[0];
Point2D p11 = GetOffsetSeg(points[count - 1], points[count], offset)[1];
Point2D p20 = GetOffsetSeg(points[count], points[count + 1], offset)[0];
Point2D p21 = GetOffsetSeg(points[count], points[count + 1], offset)[1];
Point2D d0 = new Point2D(p11.x - p10.x, p11.y - p10.y);
Point2D d1 = new Point2D(p20.x - p21.x, p20.y - p21.y);
Point2D pt = GetIntersection(p10, p21, d0, d1);
if (!listPt.Any(p => p.x == pt.x && p.y == pt.y))
{
listPt.Add(pt);
}
}
}
}
Point2DString ptSet = new Point2DString(listPt);
return(ptSet);
}