I just saw an interesting thing in the BOSL2 cuboid; the code I used was $fn=90; include<BOSL2/std.scad> cuboid([30,40,50], rounding=8, teardrop=true); and a screenshot of the result is attached. There is an artifact on one of the corners, relatively near the top. The code uses the most recent BOSL2 code from GitHub.  This doesn't appear in 2021.01 but in both 2025.04.11 and 2025.05.07.ai25355. Changing from Manifold to CGAL in the latter seems to remove the artifact. /hs

There's been no followup to this question. Is it a bug in manifold? On Mon, Jun 2, 2025 at 2:09 PM Henrik Stentjärn via Discuss < discuss@lists.openscad.org> wrote: > I just saw an interesting thing in the BOSL2 cuboid; the code I used was > > $fn=90; include<BOSL2/std.scad> cuboid([30,40,50], rounding=8, > teardrop=true); > > and a screenshot of the result is attached. There is an artifact on one of > the corners, relatively near the top. > > The code uses the most recent BOSL2 code from GitHub. This doesn't appear > in 2021.01 but in both 2025.04.11 and 2025.05.07.ai25355. Changing from > Manifold to CGAL in the latter seems to remove the artifact. > > /hs > > _______________________________________________ > OpenSCAD mailing list > To unsubscribe send an email to discuss-leave@lists.openscad.org >

I don't see the artifact, but the console does show: *Compiling design (CSG Products generation)...WARNING: [manifold] Minkowski failed with error, falling back to Nef operation: CGAL ERROR: assertion violation!Expr: e_below != SHalfedge_handle()File: /Users/distiller/libraries/install/include/CGAL/Nef_3/SNC_FM_decorator.hLine: 418* Geometries in cache: 8 Geometry cache size in bytes: 675504 CGAL Polyhedrons in cache: 1 CGAL cache size in bytes: 0 Compiling design (CSG Products normalization)... Normalized tree has 1 elements! Compile and preview finished. Total rendering time: *0:00:24.598* On Sat, Jun 14, 2025 at 8:08 AM Adrian Mariano via Discuss < discuss@lists.openscad.org> wrote: > There's been no followup to this question. Is it a bug in manifold? > > On Mon, Jun 2, 2025 at 2:09 PM Henrik Stentjärn via Discuss < > discuss@lists.openscad.org> wrote: > >> I just saw an interesting thing in the BOSL2 cuboid; the code I used was >> >> $fn=90; include<BOSL2/std.scad> cuboid([30,40,50], rounding=8, >> teardrop=true); >> >> and a screenshot of the result is attached. There is an artifact on one >> of the corners, relatively near the top. >> >> The code uses the most recent BOSL2 code from GitHub. This doesn't >> appear in 2021.01 but in both 2025.04.11 and 2025.05.07.ai25355. Changing >> from Manifold to CGAL in the latter seems to remove the artifact. >> >> /hs >> >> _______________________________________________ >> OpenSCAD mailing list >> To unsubscribe send an email to discuss-leave@lists.openscad.org >> > _______________________________________________ > OpenSCAD mailing list > To unsubscribe send an email to discuss-leave@lists.openscad.org >

Bosl2 creates the cuboid as huge Set of triangles for a polyhedron Nested in dozens of groups btw. Leonard Martin Struttmann via Discuss <discuss@lists.openscad.org> schrieb am Sa., 14. Juni 2025, 17:13: > I don't see the artifact, but the console does show: > > > > > > *Compiling design (CSG Products generation)...WARNING: [manifold] > Minkowski failed with error, falling back to Nef operation: CGAL ERROR: > assertion violation!Expr: e_below != SHalfedge_handle()File: > /Users/distiller/libraries/install/include/CGAL/Nef_3/SNC_FM_decorator.hLine: > 418* > > Geometries in cache: 8 > Geometry cache size in bytes: 675504 > CGAL Polyhedrons in cache: 1 > CGAL cache size in bytes: 0 > Compiling design (CSG Products normalization)... > Normalized tree has 1 elements! > Compile and preview finished. > Total rendering time: *0:00:24.598* > > > > On Sat, Jun 14, 2025 at 8:08 AM Adrian Mariano via Discuss < > discuss@lists.openscad.org> wrote: > >> There's been no followup to this question. Is it a bug in manifold? >> >> On Mon, Jun 2, 2025 at 2:09 PM Henrik Stentjärn via Discuss < >> discuss@lists.openscad.org> wrote: >> >>> I just saw an interesting thing in the BOSL2 cuboid; the code I used was >>> >>> $fn=90; include<BOSL2/std.scad> cuboid([30,40,50], rounding=8, >>> teardrop=true); >>> >>> and a screenshot of the result is attached. There is an artifact on one >>> of the corners, relatively near the top. >>> >>> The code uses the most recent BOSL2 code from GitHub. This doesn't >>> appear in 2021.01 but in both 2025.04.11 and 2025.05.07.ai25355. Changing >>> from Manifold to CGAL in the latter seems to remove the artifact. >>> >>> /hs >>> >>> _______________________________________________ >>> OpenSCAD mailing list >>> To unsubscribe send an email to discuss-leave@lists.openscad.org >>> >> _______________________________________________ >> OpenSCAD mailing list >> To unsubscribe send an email to discuss-leave@lists.openscad.org >> > _______________________________________________ > OpenSCAD mailing list > To unsubscribe send an email to discuss-leave@lists.openscad.org >