# Category Archives: Polylines

## AutoLISP: Continue Polyline

ONE YEAR AND 196 POSTS!!!! One year ago today, I started this blog in hopes to have reference for AutoCAD tips in case I forgot them. After one year, I have made 196 posts and every week more and more … Continue reading

Posted in AutoLISP, AutoLISP: Polylines, Modifying, Polylines | 10 Comments

## AutoLISP: Mid-Point of Entire Polyline

Here is a simple and great routine. This routine places a “point” at the mid-point of the polyline. Usually, you can simply snap to the mid-point of a polyline segment. But if you want to simply find the mid-point of … Continue reading

Posted in AutoLISP, Polylines | 7 Comments

## Lengthen Polyline Endpoint & Vertex

I have previously posted about using the LENGTHEN command, which is helpful, but the LENGTHEN command doesn’t work on polylines. Here’s how to lengthen a polyline segment whether it is an endpoint or a vertex. The examples shown in this … Continue reading

## AutoLISP: Perpendicular to Entity

Here’s a handy routine that lets you draw many perpendicular lines to any type of object. This can be done manually by using the perpendicular Osnap, but this routine lets you do this quickly. Very handy for curved objects. As … Continue reading

## AutoLISP: Break Polyline Segments

Here’s a great routine that lets you break a polyline segment. Simply select the segment that you want to be a separate polyline entity from the ones that it was initially created with. This routine works on closed polylines line … Continue reading

Posted in AutoLISP, Modifying, Polylines | 2 Comments

## AutoLISP: Break At Distance

Even though this routine prompts you to select a curve, this routine can be used on other objects as well. You simply select an object near the endpoint where you want to start from then specify a distance along the … Continue reading

Posted in AutoLISP, Modifying, Polylines | 5 Comments

## AutoLISP: Break Polyline at Vertex

You can always explode a Polyline if you need to break your polyline into individual segments. This method will make the polyline into individual lines. But what if you would like these individual segments to remain individual polylines? That’s where … Continue reading

Posted in AutoLISP, Modifying, Polylines | 1 Comment

## AutoLISP: Break at Intersections With A Gap

Here is a very useful routine that breaks objects at their intersections and then creates a gap at the intersection on the first object that you select. Here’s how: BI <enter> to start Specify the gap distance.  <enter> (Note: the … Continue reading

Posted in AutoLISP, Modifying, Polylines | 1 Comment

## Select Individual Polyline Segment

Here’s a useful quickie: You can select individual segments of a PolyLine and then edit the segments by simply holding the CTRL button and then individually picking the segments. In the example below, I selected the individual segments and then … Continue reading

Posted in Modifying, Polylines | 4 Comments

## Spline to Polyline Without LISP

So, after all those posts about LISP routines that change Polylines into Splines and Splines into Polylines, I saw a video on Cadalyst’s Website that shows how this is available in AtuoCAD since 2010. This is very handy because you … Continue reading