Confusing result with the Outline class

Revit
1

Hello, I can’t understand the result I’m getting:

I thought I’d found a solution to obtain an internal mean line for the cubic bounding volume, the geometry of the wall.

My logic:

  • Take the outer face, find the points defining it.
  • Take the inner face, find the points defining it, then move them to the outer face.
  • Define an outline to have only the extreme points.
  • Rebalance them toward the middle of the wall and lower them to the mean line.

When the wall is in two quadrants (q2, q4), I don’t get the correct line.

image
image689×687 6.09 KB

Could one of you try under 2023 or 2025 to see if you get the same result?

image
image1405×742 115 KB

import sys
import clr

clr.AddReference("RevitAPI")
import Autodesk 
from Autodesk.Revit.DB import Element,Wall,HostObjectUtils,ShellLayerType,XYZ,Outline,Line

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

w=UnwrapElement(IN[0])

ep=w.Width
orientation=w.Orientation
lc=w.Location.Curve
direc=XYZ(lc.GetEndPoint(1).X - lc.GetEndPoint(0).X,lc.GetEndPoint(1).Y - lc.GetEndPoint(0).Y,lc.GetEndPoint(1).Z - lc.GetEndPoint(0).Z).Normalize()

def findpts(f):
    lpts=[]
    clt=f.GetEdgesAsCurveLoops()
    for cl in clt:
        for c in cl:
            lpts.append(c.GetEndPoint(0))
    return lpts

refext=HostObjectUtils.GetSideFaces(w,ShellLayerType.Exterior)
refint=HostObjectUtils.GetSideFaces(w,ShellLayerType.Interior)
faceext=w.GetGeometryObjectFromReference(refext[0])
faceint=w.GetGeometryObjectFromReference(refint[0])
lptsext=findpts(faceext)
lptsint=findpts(faceint)
for p in lptsint:
    lptsext.append(p.Add(orientation.Multiply(ep)))
ol=Outline(lptsext[0],lptsext[1])
for i in range(2,len(lptsext)):
    ol.AddPoint(lptsext[i])

pstartloc=lc.GetEndPoint(0)
pstarttransit=ol.MinimumPoint.Add(orientation.Multiply(-ep/2))
pstart=XYZ(pstarttransit.X,pstarttransit.Y,pstartloc.Z)
pendtransit=ol.MaximumPoint.Add(orientation.Multiply(-ep/2))
pend=XYZ(pendtransit.X,pendtransit.Y,pstartloc.Z)
lineht=Line.CreateBound(pstart,pend).ToProtoType()
OUT=[p.ToPoint() for p in lptsext],lptsext,lineht

Thank you in advance.

Sincerely,
christian.stan

2

I found a workaround for Outline.

pstartloc=lc.GetEndPoint(0)
#pstarttransit=ol.MinimumPoint.Add(orientation.Multiply(-ep/2))
#pstart=XYZ(pstarttransit.X,pstarttransit.Y,pstartloc.Z)
#pendtransit=ol.MaximumPoint.Add(orientation.Multiply(-ep/2))
#pend=XYZ(pendtransit.X,pendtransit.Y,pstartloc.Z)
newp=[XYZ(p.X,p.Y,pstartloc.Z) for p in lptsext]
np2=sorted(newp,key=lambda p:(p.X))
pstart=np2[0].Add(orientation.Multiply(-ep/2))
pend=np2[-1].Add(orientation.Multiply(-ep/2))
lineht=Line.CreateBound(pstart,pend).ToProtoType()
OUT=lineht

But I admit I’m curious about the results on another version of Revit.

Sincerely,
christian.stan

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