AutoCAD Civil 3D Wishes

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NaParks
Posts: 4
Registered: ‎02-24-2012
Message 1 of 6 (445 Views)

3d Polyline along a surface at a specified slope

445 Views, 5 Replies
03-04-2013 07:52 AM

I think that a command that would create a 3d polyline along a surface at a specified slope would be useful for creating a diversion ditch or berm.

 

I do not wish to "drape" a line on a surface, giving the line the slope of the surface under the line.  I want to create a line at a slope going up/down the surface.

 

There is a similar command in Carlson Civil... http://files.carlsonsw.com/mirror/manuals/Carlson_2013/source/Site_Road_Design/3D_Data/3D_Polyline_b...

 

Does anyone know of a Civil3D command to accomplish this?

 

Nick

*Expert Elite*
Jeff_M
Posts: 3,958
Registered: ‎07-22-2003
Message 2 of 6 (442 Views)

Re: 3d Polyline along a surface at a specified slope

03-04-2013 08:05 AM in reply to: NaParks

There is a 3rd party program that does this:

http://dotsoft.com/mwsurfaces.htm look for GradePoly

Jeff_M, also a frequent Swamper
Valued Mentor
TerryDotson
Posts: 476
Registered: ‎06-06-2010
Message 3 of 6 (431 Views)

Re: 3d Polyline along a surface at a specified slope

03-04-2013 10:03 AM in reply to: Jeff_M

Many thanks, GradePoly is also available separately for Civil3D 2013 at the Autodesk Exchange Store.

New Member
Posts: 2
Registered: ‎05-25-2009
Message 4 of 6 (381 Views)

Re: 3d Polyline along a surface at a specified slope

03-14-2013 04:51 PM in reply to: NaParks

This can be done using corridors and no special outside software.  Create an aligment, use your engineering judgment to create the alignment roughly you think your final swale or ditch would be but offset it to one side.  Create a assembly that daylights to a surface at a 0% slope, you only need one side, create your profile at 1%.  Now create a cooridor on your alignment and profile using the 0% slope assembly.  You should be able to extract the daylight line from the assembly as a 3dpoly.  

 

Somewhat more involved than a single command but it really isn't as complicated as it sounds.

 

Cheers

*Expert Elite*
Posts: 2,501
Registered: ‎05-21-2008
Message 5 of 6 (362 Views)

Re: 3d Polyline along a surface at a specified slope

03-15-2013 10:06 AM in reply to: johnsonbk

Sorry, I disagree.

The resulting daylight line won't have the same slope as the profile used to create it.  It will have the same slope as the profile parallel to the alignment, but it will also slope towards and away from the alignment.  It will therefore be flatter than the profile, since it has more run over the same rise.


Credit where credit is due! Give kudos or accept as solution whenever you can.

Mentor
Posts: 199
Registered: ‎04-14-2009
Message 6 of 6 (357 Views)

Re: 3d Polyline along a surface at a specified slope

03-15-2013 10:44 AM in reply to: troma

So very much needed! Not just for drainage ditches but for so much more (conceptual rail alignments, roadways, etc.). I'd prefer a featureline, than a 3D polyline, just to be consistent.

 

CreateFeatureLineAtSlopeOnSurface.

Nathan Selles-Alvarez, P.E.
Senior Civil Engineer

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