possible to have a script to use flatten?

[eldon]

I experimented with your new block.dwg and was able to create a polyline just by first exploding the object (into 1466 line segments) then recombining them using the PEDIT command and JOIN option.

 

I think that this proves that the posted drawing was already at zero, and was not a 3D Polyline, although it claims to be. Possibly a 3D polyline all at zero.

 

I am getting a bit confused as to how helpful was that drawing

[eldon]

Perhaps the problem is that the OP has a 3D polyline, that is actually all at zero, but how to convert it to a 2D polyline using LT.

 

Remark's method of exploding and then using Pedit gives an LWPolyline (2D).

 

The Move method gives a Polyline (2D)

[Dadgad]

You are absolutely right Mircea the drawing contained a coplanar 3D Polyline. I had not opened it previously. If you close it, it will result in a flat closed polyline. If you explode that and look at the Z values for the start and end points of all of the 1500 or so pieces you will see that they are all at Z value zero.

[jafooli]

thanks guys I got is sussed, I was missing a few steps... bascially I had a shape as a arc, when using PEDIT it changed the shape into a 3d polyline, as the machine cannot see splines, arcs or 3d polylines so when ever I get a dwg I have to explode blocks giving me different types of lines ( arc, splines and ellipse) then I have tp prosses each line to make a polyline. this bit I was missing was explode, now that done, i converted each line into a poly and then join all together. nice

 

big thankyou to all of your info, just wish I had time to sit on autocad for a day straight to get to grips with certain bits and bobs. this forum is a god send, thanks again

[Dadgad]

In light of recent revelations regarding the coplanar nature of this 3D Polyline, and the fact that it couldn't be flattened any further, I created a 2D polyline to close the opening, then joined the 2 objects without exploding, by selecting the 2D polyline first, which made the resultant closed entity a 2D polyline.