HI All, I’ve been creating a script to take 2D polylines from AutoCAD through Dynamo to create floors in Revit. The method I’ve used is to grab the polylines using the GroupGeometriesByLayer from the LinkDWG package. I then make surfaces from the resulting polycurves then trim these surfaces to ge…

Might want to try PolyCurve.ByGroupedCurves which produces a polycurve from each curve group. Saves you the step of the Archilab node.

If you have access to Civil 3D you can use Civil 3D to open the DWG and serialize the content into a Data.Remember node or an external JSON file with Dynamo for Civil 3D. You can then use Dynamo for Revit to open the same graph (in the case of using the data.remember node) or a new graph to read th…

Okay, I had a problem like yours before, it took me a long time to find the right direction. Here is my method, please refer to it if it helps you: First, in AutoCAD, although we draw a Polyline consisting of (Line or Polyline + Arc), when entering Revit it will separate them into 2 parts: …

In addition, I have also developed an Addin using Revit API combined with WPF to make Floor modeling work with AutoCAD COM easier. I will soon post them to the Autodesk Store

Hi Jacob, I do have Civil 3D so will give this a go. Having never used Dynamo in C3D I have no Ideas which nodes to use to grab the data. A starter hint would be much appreciated…

[image] ross: I have no Ideas which nodes to use to grab the data Some nodes: Select Object All Objects On Layer Select by Property Object.Geometry If you use a more specific object type than PolyLine (i.e. sites) you might need more specific selection methods.

Thank you Jacob, much appreciated. I tried the all objects on layer node [image] Its also asking for a block, I’ve no blocks in the drawing… Some more reading on Dynamo for C3D required I think…

[Create Floors from CAD layer_V8_No_Point_Raise_2024-09-20_02-41-37] Many thanks for your reply. I’ve added the AllObjectsOnLayer & GroupByLayer nodes from the LinkDWG package. This sucessfuly grabs the polylines as COM objects. I’m not sure how to convert these to Dynamo Objects though. I tried …

So I got this to work, I just had to explode the polycurves, group all the lines and curves with the Archilab node and recombine them… simple when you know how… [image]

Thanks Jacob, that sounds like a great idea will update my graph

CAD to BIM polyline issue

jacob.small September 20, 2024, 1:42pm 8

Everything you can draw a line in is a block, including model space and every paper space. You likely want Document.Current and Document.ModelSpace as the block input.

Dynamo for Civil 3D 2025.1 Release

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CAD to BIM polyline issue

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