Hello, How can you detect mirrored blocks? I’m sending blocks to Revit with RhinoInside and am getting imcorrect transforms because I’m not able to differentiate mirrored vs. rotated blocks. I can see with GH that the transforms are different, but I’m not sure how to set up a reliable way to dist…

Hi lignindes, Mirrored blocks in Rhino have a negative Z axis, try this definition to sort Rhino mirrored blocks. [image] R8-Mirrored-Z-Axis.gh (9.0 KB)

Thank you both so much @Japhy and @dale ! We all now know about the depths of RhinoCommon, all the way down to the TransformSimilarityType enum! [trans] TransformSimilarityType enum

Detecting Mirrored blocks

Rhino

dale (Dale Fugier) March 14, 2025, 6:24pm 3

Hi @lignindes,

The attached Python script provides a reliable way of testing.

IsBlockInstanceMirrored.py (842 Bytes)

– Dale

Highlight the not mirrored objects, possible?

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Detecting Mirrored blocks

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