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Issue:

Why is the bounding box larger than my implicit model?

Applies to:

  • Implicit modeling

Cause:

This occurs because it isn’t possible to create a guaranteed exact bounding box on all implicit operations. Computing tight bounding boxes for an arbitrary implicit is actually a non-trivial problem. Since we don’t explicitly know where the surface is, we have to search for it, and doing this reliably and fast is hard. Sometimes we can use the objects used to construct the implicit to get a good guess and refine from there.

Solution:

There are two solutions for a more accurate bounding box:
  1. Use the ‘Refine Bounding Box’ with Grid Size value.
refineboundingbox.png
  1. If you need an exact bounding box, convert the Implicit Body to a Mesh body. The Mesh part will have an exact bounding box.

More on this topic:

Keywords:

implicit body issue box too bounding exact oversize inaccurate big larger boxes bounds