多条相交线根据交点一键打断,如下图:
部分代码如下:
finally
cs
namespace IFoxDemo;
public class Class1
{
[CommandMethod("ddx")]
public static void Demo()
{
//"ifox可以了".Print();
Database db = HostApplicationServices.WorkingDatabase;
Editor ed = Env.Editor;
try
{
if (!db.GetEntities(out List<Curve> curve, "请选择需要打断的线:")) return;
// List<Curve> lines = new List<Curve>();
List<Curve> lines1 = new List<Curve>();
foreach (var item in curve)//多段线炸开成线段
{
if (item is Polyline pl)
{
List<Curve> cus = ed.ExplodePolyLine(pl);
foreach (var cu in cus)
{
if (cu is Curve) lines1.Add(cu as Curve);
}
}
else if (item is Curve)
{
if (item is Ellipse) return;
lines1.Add(item as Curve);
}
}
//lines1.ForEach(line => line.ColorIndex = 1);
//foreach (var item in lines1)
//{
// db.AddEntityToModeSpace(item);
//}
return;
Dictionary<Curve, List<Point3d>> pointsOnLine = new Dictionary<Curve, List<Point3d>>();
foreach (var item in lines1)//创建线和对应点组成的字典
{
pointsOnLine.Add(item, new List<Point3d>());
}
for (int i = 0; i < lines1.Count -1; i++)
{
for (int j = i + 1; j < lines1.Count; j++)
{
Point3dCollection pos = new Point3dCollection();//创建点集合
lines1[i].IntersectWith(lines1[j], Intersect.OnBothOperands, pos, IntPtr.Zero, IntPtr.Zero);
if (pos.Count > 0)
{
foreach (Point3d item in pos)
{
pointsOnLine[lines1[i]].Add(item);
pointsOnLine[lines1[j]].Add(item);//获取线段交点的坐标存入字典
}
}
}
}
lines1.Clear();
foreach (var item in pointsOnLine)//清理线
{
Curve line = item.Key;
List<Point3d> points = item.Value;
if (points.Count == 0)
{
lines1.Add(line);
}
else
{
if (points.Count > 0)
{
points = points.OrderBy(x => line.GetParameterAtPoint(x)).ToList();//点排序
Point3dCollection pos = new Point3dCollection();
points.ForEach(x => pos.Add(x));//点集合加点
DBObjectCollection dbs = line.GetSplitCurves(pos);//线上有多个点,按顺序打断线
foreach (var dbobject in dbs)
{
if (dbobject is Curve) lines1.Add(dbobject as Curve);//一个line被他上面的点打成多个line后加入列表
}
}
}
}
db.AddEntityToModeSpace(lines1.ToArray());
db.Erase(curve);
}
catch (Exception ex)
{
}
}
}
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