Topic: 3d Polyline with zero elevation - how to copy from z's of the blocks?

[teslaxx]

Hey!

I have a little situation.

I have a 3d Polyline and the vertices have the elevation 0 (zero).
At the same, in exact (each) position of every vertex, I have a block having the correct elevation.

How could I copy the elevation from the blocks to the vertices of the polylines?

[ronjonp]

For stuff like this it's always a good idea to post your sample drawing.