Convert 3d Polyline To 2d Autocad Lisp

I want to convert some 2d polylines to 3d polyline using the elevetion of the contours.

Convert 3d polyline to 2d autocad lisp. It can be confusing because the lwpolyline and the old polyline entity used way back in the early days of autocad are both shown as a polyline in the properties window. Click modify tabdesign panelconvert 2d to 3d polylines find. After you enter pl32 autocad prompts you to select 3d polylines shown highlighted in figure 1. In other words the command will create polylines without elevation.

Note that the 2d polylines retain their layer dependence. Press to complete your selection at which time the routine converts the polylines to 2d figure 2. Note that the 2d polylines retain their layer dependence. 2d polylines are coplanar objects.

Press to complete your selection at which time the routine converts the polylines to 2d figure 2. But once in a while you come across one. I have a little problem and i need some help. I am searching fot a lisp to select a 2d polyline and convert it to 3d using contours elevetions thanks test1dwg.

Select the polyline s to convert. 3d polylines are not very useful in 2d drawings. After you enter pl32 autocad prompts you to select 3d polylines shown highlighted in figure 1. Click modify tab design panel convert 3d to 2d polylines find.

With the 3d to 2d polylines command you can easily create flat polylines. Use this utility if you need to modify the elevations of individual vertices of a 2d polyline. I know civil 3d there is an easy command for this but i have autocad 2019 and wondering if anyone knows how to do this automatically instead of tracing the 2d polyline. 2d polylines to 3d polylines hello i have numerous 2d polylines that make an object and i need to convert to 3d polylines.

Use the convert 3d to 2d polylines command to convert 3d to 2d polylines. Convert 3d polyline to 2d polyline there are various polyline types in autocad the most common of which is usually the lwpolyline lightweight polyline. By default the command will place the new polyline on ground level.