While creating stones for a board came, I stumbled upon a problem with creating an object consisting of an extruded curve and an underlying slab. The extruded curve alone renders well, the same does the slab.. They do not share any common face, nor any edge, that typically produces the "Object may not be a valid 2-manifold and may need repair" error - I made them overlap. The file is here: https://github.com/jan-koupil/marsal-a-spion/blob/fortum-discussion/pruzkumnik.scad After commenting out one object (line 13-14) or another (line 16-25) the other one renders and exports perfectly (and can be exported as valid STL and e.g. sliced), but not together. Any ideas how to repair? Many thanks. -- Sent from: http://forum.openscad.org/

Something in your bezier definition is tripping the error. Removing a tiny offset, and adding it back (before the linear extrude) resolves the error - smooths over whatever tiny glitch is throwing it. offset (r=0.1) offset (r=-0.1) resize([0,symbolL,0], auto=true) horse(); -- Sent from: http://forum.openscad.org/

There is a self-intersection in this polygon: bezier_polygon( [[[51.96973053, -97.39126590500001], [53.639185125000004, -96.685862555], [50.582437275000004, -98.237749925], [52.628106990000006, -96.920997005]], [[52.628106990000006, -96.920997005], [53.004322110000004, -96.66234911000001], [52.698647325, -96.685862555], [53.357023785, -96.52126844]], [[53.357023785, -96.52126844], [54.485669145, -99.24882806], [52.839727995000004, -99.50747595500002], [53.262970005, -100.84774232000001]], [[53.262970005, -100.84774232000001], [54.955938045, -100.118825525], [56.037556515000006, -96.80342978], [54.744317040000006, -94.8283004]], [[54.744317040000006, -94.8283004], [52.816214550000005, -91.86560633], [49.430278470000005, -95.039921405], [51.96973053, -97.39126590500001]], [[51.96973053, -97.39126590500001], [51.96973053, -97.39126590500001], [51.96973053, -97.39126590500001], [51.96973053, -97.39126590500001]], [[51.96973053, -97.39126590500001], [51.96973053, -97.39126590500001], [51.96973053, -97.39126590500001], [51.96973053, -97.39126590500001]]] ); Em ter., 14 de abr. de 2020 às 13:12, janek <jan.koupil@gmail.com> escreveu: > While creating stones for a board came, I stumbled upon a problem with > creating an object consisting of an extruded curve and an underlying slab. > > The extruded curve alone renders well, the same does the slab.. They do not > share any common face, nor any edge, that typically produces the "Object > may > not be a valid 2-manifold and may need repair" error - I made them overlap. > > The file is here: > > https://github.com/jan-koupil/marsal-a-spion/blob/fortum-discussion/pruzkumnik.scad > > After commenting out one object (line 13-14) or another (line 16-25) the > other one renders and exports perfectly (and can be exported as valid STL > and e.g. sliced), but not together. > > Any ideas how to repair? Many thanks. > > > > -- > Sent from: http://forum.openscad.org/ > > _______________________________________________ > OpenSCAD mailing list > Discuss@lists.openscad.org > http://lists.openscad.org/mailman/listinfo/discuss_lists.openscad.org >