Topic: ellipse

[ryandk]

I'm trying to use an ellipse to trim a ceiling grid for an elliptical cutout in the ceiling.  However, I just noticed that ellipses are not polylines.  I thought I could get around this by making it a masking block, however it has to be a pline to create a masking block definition.  Do any of you have an idea how I might be able to get around this?  Either making it a pline or just directly a masking block.

Thanks,
Ryan

[Keith™]

If you set pellipse to 1 ellipses will be polylines

[ryandk]

thanks

[ryandk]

Just for knowledge sake.

Setting the pellipse parameter to 1 will make all new ellipses polylines.  These polylines, although they are closed plines, cannot be made into masking block definitions nor be used to clip ceiling grids (adt).

This can be solved by exploding them when they are plines, then make all the segments into one polyline again.  It will work as a normal polyline.

[Keith™]

Ryan, the reason for that is that the polyline created by ellipse is a bonefide polyline entity (seperate vertices), not an LWPolyline ... You can do the above simply by setting PLINETYPE to 2, close and reopen the drawing and the pline will be the correct type. OR use the CONVERT command, Polyline option and select the pellipse to convert.

[Fuccaro]

You may wish to change only some ellipses in a drawing. I wrote a Lisp for this, see here: http://www.cadtutor.net/forum/viewtopic.php?t=1721&start=15