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Latest snapshot produces different STLs

NH
nop head
Sun, Sep 12, 2021 12:41 PM

Comparing the STL files generated by OpenSCAD 2021.09.09.ci8596 to previous
versions I have used, nearly all the STLs vertices are slightly different.
Usually it is just the last significant digit change by one, but sometimes
2 as in the second vertex of the second loop here.

[image: image.png]

Is this expected, what has changed?

Comparing the STL files generated by OpenSCAD 2021.09.09.ci8596 to previous versions I have used, nearly all the STLs vertices are slightly different. Usually it is just the last significant digit change by one, but sometimes 2 as in the second vertex of the second loop here. [image: image.png] Is this expected, what has changed?
TP
Torsten Paul
Sun, Sep 12, 2021 9:31 PM

On 12.09.21 14:41, nop head wrote:

Is this expected, what has changed?

If there's text() involved, yes. Otherwise no, but CGAL
did make a big version jump and the build environment
changed too.

Linear extrude with twist has seen improvements but I
would assume those cases would generate a more different
result.

ciao,
Torsten.

On 12.09.21 14:41, nop head wrote: > Is this expected, what has changed? If there's text() involved, yes. Otherwise no, but CGAL did make a big version jump and the build environment changed too. Linear extrude with twist has seen improvements but I would assume those cases would generate a more different result. ciao, Torsten.
NH
nop head
Sun, Sep 12, 2021 10:03 PM

None of my library printed objects include text. The example was just a
simple rubber foot created with rotate_extrude().
https://github.com/nophead/NopSCADlib/blob/master/printed/foot.scad#L49

Probably not a big issue but I publish STLs on github, so I notice if any
change.

On Sun, 12 Sept 2021 at 22:32, Torsten Paul Torsten.Paul@gmx.de wrote:

On 12.09.21 14:41, nop head wrote:

Is this expected, what has changed?

If there's text() involved, yes. Otherwise no, but CGAL
did make a big version jump and the build environment
changed too.

Linear extrude with twist has seen improvements but I
would assume those cases would generate a more different
result.

ciao,
Torsten.


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None of my library printed objects include text. The example was just a simple rubber foot created with rotate_extrude(). https://github.com/nophead/NopSCADlib/blob/master/printed/foot.scad#L49 Probably not a big issue but I publish STLs on github, so I notice if any change. On Sun, 12 Sept 2021 at 22:32, Torsten Paul <Torsten.Paul@gmx.de> wrote: > On 12.09.21 14:41, nop head wrote: > > Is this expected, what has changed? > > If there's text() involved, yes. Otherwise no, but CGAL > did make a big version jump and the build environment > changed too. > > Linear extrude with twist has seen improvements but I > would assume those cases would generate a more different > result. > > ciao, > Torsten. > _______________________________________________ > OpenSCAD mailing list > To unsubscribe send an email to discuss-leave@lists.openscad.org >
JB
Jordan Brown
Sun, Sep 12, 2021 10:27 PM

On 9/12/2021 2:31 PM, Torsten Paul wrote:

If there's text() involved, yes.

The text differences should be much larger, in the 2.4% range, not in
the couple-of-ppm range.

On 9/12/2021 2:31 PM, Torsten Paul wrote: > If there's text() involved, yes. The text differences should be much larger, in the 2.4% range, not in the couple-of-ppm range.