Translating to Python

Developers
1

How would I change this into a Python script?

private XYZ GetIntersection( 
  Line line1, 
  Line line2 )
{
  IntersectionResultArray results;
 
  SetComparisonResult result 
    = line1.Intersect( line2, out results );

  if( result != SetComparisonResult.Overlap )
    throw new InvalidOperationException( 
      "Input lines did not intersect." );
 
  if( results == null || results.Size != 1 )
    throw new InvalidOperationException( 
      "Could not extract line intersection point." );
 
  IntersectionResult iResult 
    = results.get_Item( 0 );

  return iResult.XYZPoint;
}

I can sometimes work out the logic but this one has me scratching my head.

2

What was the code written in before?

3

Isn’t this a snippet from Revit SDK sample code CreateTruss in C#? Should look for a package of that.

4

It is. I pulled it from Jeremy’s blog but he said it was from the SDK. Would there be a Python script there as well?

5

SDK samples are usually in C#. A few of them have VB equivalents. As far as I know no official python scripts.

6

Yeah, that’s what I thought, hence the question. :wink:

7 
import clr
from Autodesk.Revit.DB import Line, XYZ
from Autodesk.Revit.DB import SetComparisonResult, IntersectionResultArray

def get_intersection(line1, line2):
	results = clr.Reference[IntersectionResultArray]()		
    # See ironpython.net/documentation/dotnet for clr.Reference

	result = line1.Intersect(line2, results)
    # http://www.revitapidocs.com/2018/51961478-fb36-e00b-2d1b-7db27b0a09e6.htm
	
	if result != SetComparisonResult.Overlap:
		print('No Intesection')
	
	intersection = results.Item[0]
	return intersection.XYZPoint


line1 = Line.CreateBound(XYZ(0,0,0), XYZ(10,0,0))
line2 = Line.CreateBound(XYZ(5,-5,0), XYZ(5,5,0))
point = get_intersection(line1, line2)
print(point)
# <Autodesk.Revit.DB.XYZ object at 0x00000000000001BA [(5.000000000, 0.000000000, 0.000000000)]>
6 Likes
8

Hi @Gui_Talarico do you know if this method works in Dynamo/CPython3 for Revit 2023? I cannot seem to get a result on checking the SetComparisonResult value (seen here as SetComparisonResult.Overlap) where I now seem to be getting returned an integer value. The same seems to be happening with the lesser Line1.Intersect(Line2) i.e. a simple integer returned.