I am trying to preview some geometry in Grasshopper and I’ve discovered that it doesn’t like non-manifold geometry. The geometry isn’t previewd. Is this a bug?
If it’s not possible to preview non-manifold geometry, is there a way to identify which elements are problematic so that I can explode just those elements?
“Non-manifold geometry” in Rhino means a polysurface with three or more surfaces are joined along the same edge, or possibly the edge of a surface is joined to the middle of another surface.
Non-manifold geometry can result in problems, particularly if closed volumes are involved.
ShowEdges command in Rhino with the Non-manifold edges option selected. Set the edge color to a color which will be visible, such as magenta, red or green.
Non-manifold I think on its own is considered invalid, but there are additional issues with that shape. Using the Null Item component we can inspect the validity: