How to get curve from an elbow by using python

Developers
1

is it possible to retrieve the curve from a pipe elbow (fabrication part) by using python

2

Hi,

a solution using the CoordinateSystem of the connectors of the elbow (fabrication part)

image
image1827×826 92.7 KB 

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

#import Revit API
clr.AddReference('RevitAPI')
import Autodesk
from Autodesk.Revit.DB import *
import Autodesk.Revit.DB as DB

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

clr.AddReference('RevitServices')
import RevitServices
from RevitServices.Persistence import DocumentManager
doc = DocumentManager.Instance.CurrentDBDocument
	
def get_elbow_curve(fabPart):
	"""
	return the arc geometry of elbow fabrication part
	"""

	conSet = fabPart.ConnectorManager.Connectors
	if conSet.Size == 2:
		pair_sys_origin = [[con.CoordinateSystem, con.Origin] for con in conSet]
		pta = pair_sys_origin[0][1].ToPoint()
		ptb = pair_sys_origin[1][1].ToPoint()
		vector = pair_sys_origin[0][0].BasisZ.Negate().ToVector()
		arc = DS.Arc.ByStartPointEndPointStartTangent(pta, ptb, vector)
		return arc
	else:
		return None #The fitting have more than 2 connectors


toList = lambda x : x if hasattr(x, '__iter__') else [x]

#Preparing input from dynamo to revit
lstfitting = toList(UnwrapElement(IN[0]))

OUT = [get_elbow_curve(e) for e in lstfitting]
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