shift 3D polyline with slope

[LASSAADTH]

how i can offset a 3D polyline with slope, I explain I have a 3D polyline I want to offset with a slope of 3H: 2V.
Thank you for your answers.

[neilyj666]

Convert to a featureline and use a grading object - take a look at the Help

[AllenJessup]

Use OFFSETFEATURE. It will work on 3D Polylines too.

Allen

[neilyj666]

Probably a neater solution as it avoids the use of a Grading Object....as long as you know the difference between Slope and Gradient...

[LASSAADTH]

this is perfect
But I would love to go further, is't possible to shift with two different slopes, one at the beginning and at the end?

Thank you for all your answers.

[AllenJessup]

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@neilyj666 wrote:

....as long as you know the difference between Slope and Gradient...

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The help seems to lack any mention of it although it did in the wayback. The most important thing to know is that entering a slope give you the X over 1. So if you enter 3 you get a 3 to 1 slope. In the OPs case the slope would have to be reduced to 1.5 over 1 rather than 3 over 2.

Allen

[AllenJessup · Accepted solution]

 See:

http://docs.autodesk.com/CIV3D/2013/ENU/index.html?url=filesCUG/GUID-7C9ADB83-3E60-4111-8482-ACC1296...

for how to use the Variable option. You may need to turn the polyline into a Featureline for this.

Allen

[owenmull]

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@LASSAADTH wrote:

this is perfect
But I would love to go further, is't possible to shift with two different slopes, one at the beginning and at the end?

Thank you for all your answers.

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To my knowledge, not using the OFFSETFEATURE command. It should apply one uniform slope for the entire line.

What I would do is convert the 3D Poly to a feature line as Allen said, and do a 3:1 grading for a very small distance (like 0.01') at the start, then the same thing at the end at a 2:1, and do a grading transition between them.

There may be another faster way, but that's what comes to mind right now.

HTH