Dynamo 3.3.0.6316 - 50% of polysurface surfaces return wrong normals

[jayDevel]

Dynamo Version

Dynamo Core 3.3.0.6316 Dynamo Revit 3.3.0.6523

Host

No response

Operating System

Windows 11

What did you do?

1. Created different polysurfaces (from bounding box or from cuboid)
2. Extracted all surfaces from polysurface
3. Computed the normals of each surface (u=0, v=0)

What did you expect to see?

6 different normal directions (3 pairs of a positive and a reveresed direction)

What did you see instead?

3 differnt normal directions (3 pairs of equally directed normals. For Example:

Vector(X = 0.385, Y = 0.081, Z = 0.919, Length = 1.000),
Vector(X = 0.385, Y = 0.081, Z = 0.919, Length = 1.000),
Vector(X = 0.839, Y = 0.385, Z = -0.385, Length = 1.000),
Vector(X = 0.385, Y = -0.919, Z = -0.081, Length = 1.000),
Vector(X = 0.839, Y = 0.385, Z = -0.385, Length = 1.000),
Vector(X = 0.385, Y = -0.919, Z = -0.081, Length = 1.000)

What packages or external references (if any) were used?

None

Stack Trace

No response

Details

DynamoPolysurfaceNormalBugExample.zip

[github-actions[bot]]

Thank you for submitting the issue to us. We are sorry to see you get stuck with your workflow. While waiting for our team member to respond, please feel free to browse our forum at https://forum.dynamobim.com/ for more Dynamo related information.

[aparajit-pratap]

@jayDevel, thanks, for reporting this issue. We are in the process of developing fixes for Polysurfaces in Dynamo holistically and will ensure that such issues are addressed.