With the new JOIN enhancements, joining lines at their endpoints or polylines will create a polyline. If there happens to be a spline in the selection set, the resulting object will be a spline. I am not sure about 3D Polylines So I will have to check that out. Thanks for the question. I will have to do an updateed post about the JOIN. Here is a sample code that uses the 'Entity.JoinEntity' method to demonstrate joining of 2d/3d polylines. Converting a PolyLine to a Line. When working in AutoCAD it is often needed to convert linetypes. One of the most common is Polylines to Lines. Lines enable editing of small sections in slightly different maner to polylines. In order to convert an existing multisegmented polyline to a line. This might not make sense to you now now, but will surely come in handy when you will come to a point where you need to convert a line to a polyline.An example where this will be needed is when you are working on a project where you need to join a series of line to make it a single object and use the resulting polyline as a PATH.
Additional editing operations are available for changing the shape and display of polyline objects. You can also join separate polylines.
You can modify polylines in several ways using PEDIT, the Properties palette, or grips including the following:
- Move, add, or delete individual vertices
- Set a uniform width for the entire polyline or control the width of each segment
- Create an approximation of a spline called a spline-fit polyline
- Display noncontinuous linetypes with or without a dash before and after each vertex
- Change the orientation of text in a linetype assigned to a polyline by reversing its direction
Join Polyline Segments
You can join a line, an arc, or another polyline to an open polyline if their ends connect or are close to each other.
If the ends are not coincident but are within a distance that you can set, called the fuzz distance, the ends are joined by either trimming them, extending them, or connecting them with a new segment.
Spline-fit polylines return to their original shape when joined. Polylines cannot be joined into a Y shape.
Autocad 3d Polyline
If the properties of several objects being joined into a polyline differ, the resulting polyline inherits the properties of the first object that you selected.
Modify a Segment Within a Polyline
You can modify a segment in a polyline using the MOVE, ROTATE, or SCALE commands. You select the single arc or line segment, also called a subobject, within a polyline by pressing Ctrl when you click it.
You can also use the Stretch, Move, Rotate, and Scale grip modes to modify the polyline segment. Properties of polyline segments such as color or linetype, cannot be modified individually, but you can use the Properties palette to modify the width of individual segments.
Can't Join Lines In Autocad
See AlsoJoining Polylines Civil 3d
Trim or Extend Objects
Break and Join Objects