//////////////////////////////////////////////////////////////////////////////////////////////////////////////////
public Polyline ClosetPly(List <Line> C, bool B) //////////////将线段组闭合成多段线
{
List <Point3d> last = new List <Point3d>();
for (int i = 0; i < C.Count - 1; i++)
{
Point3d pt1;
Point3d pt2;
if (i == 0)
{
ViperClass.ClosedPt(C[0], C[C.Count - 1], out pt1, out pt2);
last.Add((pt1 + pt2) / 2);
}
ViperClass.ClosedPt(C[i], C[i + 1], out pt1, out pt2);
last.Add((pt1 + pt2) / 2);
}
last.Add(last[0]);
if (B == false) //////不闭合的情况
{
Vector3d vc = Point3d.Subtract(C[C.Count - 1].From, C[C.Count - 1].To); //////该方向用于判断最后那个点的位置
last[0] = C[0].From;
if (last[1].DistanceTo(C[0].From) < last[1].DistanceTo(C[0].To)) ////最远
{
last[0] = C[0].To;
}
last[last.Count - 1] = C[C.Count - 1].From;
if (last[last.Count - 2].DistanceTo(C[C.Count - 1].From) < last[last.Count - 2].DistanceTo(C[C.Count - 1].To))///最远
{
last[last.Count - 1] = C[C.Count - 1].To;
}
}
return(new Polyline(last));
}
/// <summary>
/// This is the method that actually does the work.
/// </summary>
/// <param name="DA">The DA object is used to retrieve from inputs and store in outputs.</param>
protected override void SolveInstance(IGH_DataAccess DA)
{
Curve polylineCurve = null;
if (!DA.GetData(0, ref polylineCurve))
{
return;
}
Curve[] seg = polylineCurve.DuplicateSegments();
List <Line> right = new List <Line>();//////分离出线段部分
for (int i = 0; i < seg.Length; i++)
{
if (seg[i].IsLinear())
{
Line test = new Line(seg[i].PointAtStart, seg[i].PointAtEnd);
right.Add(test);
}
}
List <Point3d> last = new List <Point3d>();////重新计算交点
Point3d pt1 = Point3d.Unset;
Point3d pt2 = Point3d.Unset;
if (polylineCurve.IsClosed)////闭合曲线
{
ViperClass.ClosedPt(right[0], right[right.Count - 1], out pt1, out pt2);
last.Add((pt1 + pt2) / 2);
for (int i = 0; i < right.Count - 1; i++)
{
ViperClass.ClosedPt(right[i], right[i + 1], out pt1, out pt2);
last.Add((pt1 + pt2) / 2);
}
last.Add(last[0]);
}
if (!polylineCurve.IsClosed)////不闭合曲线
{
last.Add(right[0].From);
for (int i = 0; i < right.Count - 1; i++)
{
ViperClass.ClosedPt(right[i], right[i + 1], out pt1, out pt2);
last.Add((pt1 + pt2) / 2);
}
last.Add(right[right.Count - 1].To);
}
DA.SetData(0, new Polyline(last));
}