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CAD tip CAD tip # 7329:

Question CAD 
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Q - question

Draw 3D polyline by length, azimuth, slope.

A - answer With a simple LISP utility 3DPolyC, you can draw a 3DPoly by entering length (3D length), azimuth (in degrees, from North) and slope (in percents, plus/minus, 100%=45°) of its individual points (segments). This could be useful for piping, geology or similar applications.

The triplets you enter for the individual vertices of the 3D polyline are not X,Y,Z coordinates but the values of length,azimuth,slope (e.g. 123.4,20,-50 - segment 123.4m, in the 20° direction, descending 50%).

You can download the free 3DPolyC utility from www.cadstudio.cz/download, load it with APPLOAD and start it with the 3DPOLYC command.

Since version 1.1 of the same utility you can also use the command 3DPOLYS, which is optimized e.g. for drawing sewer lines. You will enter the initial elevation, the uniform slope (degrees, percent, promile, 1:X) and then just click the XY vertices (plan) - the polyline will draw in 3D with the given slope. The option "S" allows to change the slope also during specifying the individual segments.

ACAD
100% *  CAD 
26.4.2010    9403×  
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applies to: AutoCAD ·

See also:
Tip 11914:Maze generator for AutoCAD.
Tip 11913:Simple export of vertex-coordinates from a selected polyline.
Tip 11769:How to convert border lines (rails) to a surface?
Tip 11511:Assigning elevations to 2D contours (isolines).
Tip 11179:Select objects in negative elevation or in a given 3D octant.


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