Hi all, Very new Dynamo user here. I am a bridge engineer in MA trying to find ways that my team can automate or at least speed up some of our design / drafting tasks. We use AutoCAD C3D pretty exclusively (i.e., we do not use Revit at all) - it’s what our clients use and require that we use. I …

Hi @betsy.kirtland , If you haven’t already done so, the first thing you should do is download the Civil 3D Toolkit package. It has several additional nodes that make Dynamo much more usable in Civil 3D, including a node to create polylines. Here is an example for you to try as you get going. Brid…

Checkout @zachri.jensen recent example which might be similar application. [image] Civil 3d Point Group by Description in Current dwg Civil3D Already got those wink I do roadways and know next to nothing about runways, but here is an example for you to play around with.…

Thanks, @KirkWM , but I don’t think this is quite what I’m looking for. I am hoping to avoid using Excel for this purpose.

Thank you, @zachri.jensen !! This seems to be exactly what I’m looking for. Much appreciated!

@zachri.jensen if you have a moment, could you explain to me why the “get planes at bridge start and end” and “intersect with offset curves” are necessary? I can understand every other part of the code except for those. Thanks in advance!

Sure thing. My thought process was to lay out the graph in a similar way to how I would approach the process in Civil 3D. Here’s what that would look like: Offset the alignment to create the girder and deck polylines Draw lines perpendicular to the alignment at the bridge start and end stations Tr…

Thank you! I didn’t realize that Dynamo needs planes for trimming. That explains it. Now I’m off to try to come up with ways to modify the code to allow for skew angles & variable girder spacing. Wish me luck!

[image] betsy.kirtland: I didn’t realize that Dynamo needs planes for trimming Not quite…the Geometry.Trim node won’t actually work directly with a plane. That’s why I was intersecting the planes with the lines to get points, and then those are used as the geometry to trim with.

Hi @zachri.jensen , I have spirals on my alignment and it is not drawing the polylines. Got a solution to this? Ben

Does the AlignmentExtensions.GetGeometry node successfully return the polycurves? If I remember correctly it will tesselate the spirals to a series of line segments. But if it gets a nurbs curve then I don’t know if the PolylineExtensions.ObjectByGeometry node will work.

Yes, it does. This is the error I am getting {Warning: Geometry.Trim operation failed. PolyCurves may be branching} when the offset is set to a non-zero figure.

Creating Polyline offset from Alignment

Civil 3D

KirkWM May 19, 2021, 8:18pm 2

Checkout @zachri.jensen recent example which might be similar application.

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Creating Polyline offset from Alignment

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