This command converts a 2D polyline into a 3D polyline by using the
elevations of points. At
each vertex of the polylines, the program looks for a point with
elevation at the same x,y location.
The points can be Carlson point blocks or AutoCAD POINT entities. This
routine can be useful if
the linework is created in 2D at zero elevation with commands like
Design Polyline, and points
with elevation are located along the linework. Then the linework can be
converted into 3D polylines
with this command. For example, a centerline polyline with arcs may
need to be created in 2D
for stationing because AutoCAD does not allow arcs on 3D polylines. To
use this polyline as
a breakline in surface modeling, this command can convert the polyline
into a 3D polyline.
Select points and polylines.
Select objects: select polylines to convert and the
points with elevation
Keep existing
polylines [Yes/<No>]? press
Enter
Set layer name for
converted polylines [Yes/<No>]? Y
Layer name for 3D
polylines <BREAKLINE>: Flowline
The routine will convert the 2D polyline into a 3D
polyline and place it on the dictated layer.
Pulldown Menu Location: 3D Data > 2D to 3D Polyline
Keyboard Command: 2dto3dpt
Prerequisite: A polyline and points
File Names: \lsp\poly3d.arx