Revit.DB.Line to Reference not working

Developers
, ,
1

Hi there,

I am unable to simply get a Revit Lines’ Reference as I believe I should.

Here I have my Revit Lines
image

Yet when I try and call their Reference Property I am given nothing but nulls.

image

Any ideas why?

Code:

import clr
import sys

import System
clr.AddReference('ProtoGeometry')
from Autodesk.DesignScript.Geometry import *

clr.AddReference('RevitNodes')
import Revit
clr.ImportExtensions(Revit.GeometryConversion)

# Get the input curves from Dynamo
DSpolycurve = IN[0]

RevitLines = [x.ToRevitType() for x in DSpolycurve.Curves()]
Refs = [revit_curve.Reference for revit_curve in RevitLines]

OUT = Refs

@c.poupin I would love your wisdom on this one!

2

Hi @haganjake2 ,
Maybe I am wrong but: you created the input as DesignScript instances, so they have no references.

1 Like
3

You can create a dummy detail or model curve and use its reference.
Where are these Lines in Dynamo coming from?

4

Thanks both for your responses.

The curves are coming from a linked floor element. I am getting the perimeter curves for the floor using Element.Location.

I’d rather not draw dummy curves in my revit model if possible!

5

Try to get floor edges in python node. If you collect edges correctly, they have the property of Reference.

1 Like
6

you have to work and stay with the Revit geometries, then you will probably have to convert references from your linked model to your host model

7

Thanks @Deniz_Maral & @c.poupin - Ah ok it makes sense now.

I think I lacked the fundamental understanding of what a Reference was!

I need to filter the lines to make sure I’m getting just the perimeter curves so will have to do some python filtering but I think it should be possible.

Thanks for the guidance.

If either of you fancy a further challenge I’d love some help with this post also: