In addition to the regular AutoCAD Draw 3D Polyline command, there
is this Carlson command that has several options.
The Show Options on Startup dialog will appear every time the command is run, unless this is turned off. If it is off, then the last settings will apply. To get the box back, choose O for Options.
Prompt for Elevation/Slope controls whether the elevation of each picked point will be entered in, or hit S for slope to draw a slope line.
Use Surface Model from File will use a grid or triangulation file as a surface model. Wherever the points are picked on the surface, the elevation of the surface will be assigned to the polyline.
If Use Current Drawing Layer is on, the layer of the new polyline will be the current layer.
If the current layer is not used, the Layer option allows you to Select from a list or Pick from the screen.
There are 3 options under Auto-Zoom Mode. Never will not zoom to the last point picked. Proximity will zoom to the percent proximity set below. Always will always zoom center on every point.
If
the Proximity Auto-Zoom mode is checked, the percent of the proximity
is set in the Proximity Zoom Level% box.
[Continue/Extend/Follow/Options/<Pick point or point
numbers>]: pick a point
Elevation <0.00>: 435
Z: 435.00, Hz dist: 0.00, Slope dist: 0.00, Slope: 0.0% Ratio: 0.0:1
[Arc/Direction/Close/Follow/Undo/<Pick point or point numbers>]:
pick a point
Slope/Ratio/Interpolate/Degree/<Elevation> <0.00>: 444
Z: 444.00, Hz dist: 3.67, Slope dist: 9.72, Slope: 245.3% Ratio: 0.4:1
[Arc/Direction/Close/Extend/Follow/Undo/<Pick point or point
numbers>]: pick a point
Slope/Ratio/Interpolate/Degree/<Elevation> <0.00>: 399
Z: 399.00, Hz dist: 3.16, Slope dist: 45.11, Slope: -1425.2% Ratio:
-0.1:1
[Arc/Direction/Close/Extend/Follow/Undo/<Pick point or point
numbers>]: press Enter to end
Pulldown Menu Location: Draw
Keyboard Command: 3DP
Prerequisite: None