OpenSCAD STL export may not be fastidious enough!

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OpenSCAD STL export may not be fastidious enough!

Henry Baker
I've noticed that some of the 'watertight' STL files produced by OpenSCAD aren't considered to be 'watertight' by some other programs:

netfabb Studio, MeshLab, VisCAM View.

MeshLab finds some 'zero-area' faces; VisCAM View finds 'unmatched edges'; netfabb Studio finds non-manifolds.

I think it may be time for OpenSCAD to export _binary_ STL files to avoid some of the issues we discussed over the past week or so.

Attached are some examples output by OpenSCAD.
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Re: OpenSCAD STL export may not be fastidious enough!

nophead
That may help in some cases but the problem, as I understand it, is that OpenSCAD computes the model in higher precision so the conversion to float to make the STL needs to be topologically aware. That would mainly be removing degenerate facets I think.


On 2 July 2013 20:12, Henry Baker <[hidden email]> wrote:
I've noticed that some of the 'watertight' STL files produced by OpenSCAD aren't considered to be 'watertight' by some other programs:

netfabb Studio, MeshLab, VisCAM View.

MeshLab finds some 'zero-area' faces; VisCAM View finds 'unmatched edges'; netfabb Studio finds non-manifolds.

I think it may be time for OpenSCAD to export _binary_ STL files to avoid some of the issues we discussed over the past week or so.

Attached are some examples output by OpenSCAD.
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Re: OpenSCAD STL export may not be fastidious enough!

kintel
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In reply to this post by Henry Baker
On 2013-07-02, at 21:12 , Henry Baker wrote:

> I've noticed that some of the 'watertight' STL files produced by OpenSCAD aren't considered to be 'watertight' by some other programs:
>
Do you have the .scad files used to generate those STLs? They could provide good test cases for future enhancements.

I don't think binary STLs would make a difference in these cases, but but if you're interested in pursuing that train of thought, it shouldn't be hard to hack in binary stl support in OpenSCAD for testing.

 -Marius

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