Hi! I found a weird behavior in rhinocommon api. It might be a bug or just me being fooled by expecting something different. I want to create an oriented empty box to union with points and grow. from Rhino.Geometry import Box, BoundingBox, Plane box = Box(Plane.WorldXY, BoundingBox.Empty) print…

Hey Gianluca! I’m digging through the source code to find out more about this. For now, here is a solution that returns 0.0 True 0.0 True from Rhino.Geometry import Box, BoundingBox, Plane, Interval box = Box(Plane.WorldXY, Interval(0,0),Interval(0,0),Interval(0,0)) print (box.X.Length, box.Is…

In RhinoCommon an empty bounding box is this. new BoundingBox(1, 0, 0, -1, 0, 0); A box that has a width of -2. If you use box.Union(Point3d.Unset) you’ll notice the width becomes 2 because when using Union RhinoCommon attempts to make the BoundingBox Valid, which swaps the values. This script i…

Ciao old pal! Thanks for the explanation, I’ve already used the intervals in the code to get an empty box as you showed. However I think the behavior of the constructor that takes the BoundingBox.Empty might be misleading. Thanks for the quick answer!

Ciao :slight_smile: I’m asking internally about this, I think the way Box does Union is incorrect tbh. The proper solution might be to create your own Union method for now. I’ve filed a bug so we can look into it https://mcneel.myjetbrains.com/youtrack/issue/RH-85631/Box.Union-behaves-incorrectly …

Creating an empty box with Box(plane, BoundingBox.Empty)

Rhino Developer

brian (Brian Gillespie) February 12, 2025, 10:44pm 6

RH-85631 is fixed in Rhino WIP

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Creating an empty box with Box(plane, BoundingBox.Empty)

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