Weird rendering of solid difference #540
Comments
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I just tried using
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Classic NURBS issue. Force triangle mesh for now. |
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@whitequark Indeed that helped:
How will that affect STEP 3D export? |
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You wouldn't be able to export rational surfaces after this, only triangle meshes; in particular IIRC exported STEP files will just be empty and you'll have to use STL. |
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@whitequark That sucks. :/ What if I keep the model with this red things / errors and export then to STEP? Is the red thing due to rendering issue, or the model itself is broken due to intersection problems? |
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The model itself is broken. If you really need NURBS surfaces, try making the intersection not "cut across the seam". E.g. if you have a difference cutting exactly 1/4 of a circle, try moving it away by 0.1 mm or something. |
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@whitequark Thanks a lot. |
When a plane coinsides with a seam we need to copy that trim curve. The existing curve belongs to the original shell surfaces and an intersection is otherwise not found. Fixes solvespace#540.
When a plane coinsides with a seam we need to copy that trim curve. The existing curve belongs to the original shell surfaces and an intersection is otherwise not found. Fixes #540.
System information
Compiled at commit 16c5fa6
Operating system: Debian testing, amd64
Expected behavior
What should have happened?
I had a lathe operation, plus 2 extra extrusions (one with 3x time rotating symmetry) acting as a difference.
At the end I wanted to see a crossection, so I did another sketch, extruded it, and used as a difference.
I expected to have a solid model, not hollow one, with some red marks on the edges. There are some other red marks, that I don't know what they are, and some edges (45 deg ones) do not have the red edges.
No idea what is going on.
Actual behavior
Project file: adapter-plate.tar.gz
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