Drape 3D Polyline On Surface
This command converts a 2D polyline into a 3D polyline by
calculating 3D polyline vertices at all the intersects of the 2D
polyline with surface entities (contour polylines, triangulation
lines) and by interpolating elevations from these intersections at
the original vertices locations. An application for this command is
to create breaklines. For example, a ridge breakline could be
generated from contour lines by drawing a 2D polyline along the
ridge and across the contours. Then this command could grab the
contour line elevations along the polyline to make a ridge
breakline.
In addition to using entities in the drawing, the 2D polyline
can be converted to 3D using a surface model stored in
triangulation (.flt or .tin) file. If you use a file, then you can
also use the polyline's current elevation as a vertical offset from
surface.
Prompts
By Screen
Entities:
Source of surface model [File/<Screen>]? Type S for Screen
Select polylines to convert.
Select objects: select the
polyline(s) to convert
Select surface 3DFaces, lines and polylines.
Select objects: select the surface entities (contour
polylines, breaklines, triangulation lines, etc)
Reading points ... 692
Keep existing polylines [Yes/<No>]? Press Enter
This command creates a new 3D polyline, and
this prompt allows you to keep the old polyline.
Set layer name for converted polylines [Yes/<No>]?
Press
Enter
This
allows you to assign the new polyline to a layer.
Converting polylines ...
Converted 1 polylines.
By a .flt or .tin
File:
Source of surface model [<File>/Screen]? Type F for File
Select polylines to convert.
Select objects: select the surface entities (contour
polylines, breaklines, triangulation lines, etc)
Use current polyline elevations as vertical offset from surface
[Yes/<No>]? Press
Enter
This will offset the new polyline
by its current elevation. That is, if a polyline has an elevation
of -4 and the surface you are converting it to has an elevation of
800, then saying Yes will drape the polyline at an elevation of
796.
Keep existing polylines [Yes/<No>]? Press Enter
This command creates a new 3D
polyline, and this prompt allows you to keep the old
polyline.
Set layer name for converted polylines [Yes/<No>]?
Press Enter
This allows you to assign the new
polyline to a layer.
Keyboard Command: 2dto3dp
Prerequisite: A polyline and surface lines or grid file or
triangulation file.