Extract Surface mesh and strings to new drawings

Civil 3D
1

Hi there,

I work as a civil designer and one of our main tasks is to often export surface mesh and surface strings to the surveyor in 2 different drawings. One containing the triangles ( surface strings ) which is basically the 3d polylines and the 3d surface which includes the 3d faces and the minor and major contours.

DYNAMO
DYNAMO1600×766 145 KB

I was wondering if anyone could help by advising on how I automate this using dynamo as i am fairly new using it.

Thanks!

2

Hi @v.soaresFDBGU,

You can create the 3D faces for the TIN using a sequence like this:

image
image1316×521 71.9 KB

For the contours, these nodes will help with that:

image
image334×475 16.3 KB

Then you can create polylines from the contours using the Object.ByGeometry node.

Based on your screenshot, it seems like what you are describing is the breaklines in the surface definition. This is more tricky. How do you extract those breaklines currently?

3

Hi Zachri,

Thanks for your reply, This breaklines are feature lines which are present in the Design surface. What i do currently is exploding them into 3D polylines and copy and paste into another drawing.
Same thing with the 3D faces, i change the surface style to 3D faces + contours, explode them and past them into another drawing.

4

OK, that makes it easier. If you already have the breaklines, then you can create 3D polylines from them using a process shown here:

5

Awesome, i will give it a try! Thanks! If anything, i come back here haha

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