3D Polyline by Slope on Surface

I would like to draw a polyline that follows a specified slope/grade along a surface. Is there any way of doing this in GM?
Similar to this tool in CAD:
https://www.youtube.com/watch?v=t6VAKWSD-7o
If no tool is available, does anybody have suggestions for a script approach.
Thank you,
Similar to this tool in CAD:
https://www.youtube.com/watch?v=t6VAKWSD-7o
If no tool is available, does anybody have suggestions for a script approach.
Thank you,
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