teepee changed the topic of #openscad to: OpenSCAD - The Programmers Solid 3D CAD Modeller | This channel is logged! | Website: http://www.openscad.org/ | FAQ: https://goo.gl/pcT7y3 | Request features / report bugs: https://goo.gl/lj0JRI | Tutorial: https://bit.ly/37P6z0B | Books: https://bit.ly/3xlLcQq | FOSDEM 2020: https://bit.ly/35xZGy6 | Logs: https://bit.ly/32MfbH5
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<kintel> Xowap Btw., you should be able to do per-face color OBJ export in the current development snapshot of OpenSCAD
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<J24k29> kintel - i get no colors with obj export any idea?
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<pca006132> thinking about it, I should probably try to run some benchmark against 5282 to see how the performance is affected
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<gbruno> [github] pca006132 pushed 1 modifications (use tbb parallelization) https://github.com/openscad/openscad/commit/9c85adbbe3f5555c1c2124214850b56a4b84dbab
<gbruno> [github] pca006132 synchronize pull request #5282 (updated manifold to latest version with double precision floating point) https://github.com/openscad/openscad/pull/5282
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<gbruno> [github] pca006132 synchronize pull request #5282 (updated manifold to latest version with double precision floating point) https://github.com/openscad/openscad/pull/5282
<gbruno> [github] pca006132 pushed 1 modifications (try to play with precision) https://github.com/openscad/openscad/commit/2a6c51afa0617f9157f3d462fe874f7f77afb000
<gbruno> [github] pca006132 pushed 1 modifications (use actual expected output for 5211 test) https://github.com/openscad/openscad/commit/cf5ae59434614ac04dc726a91a942ebafaf62523
<gbruno> [github] pca006132 synchronize pull request #5282 (updated manifold to latest version with double precision floating point) https://github.com/openscad/openscad/pull/5282
<pca006132> the sad thing here is that double precision causes more small triangles to remain on the mesh, and this causes minkowski to become slower
<J24k29> isn't that determined by the resolution of the objects?
<InPhase> There are a lot (probably a majority) of usages for which some sort of remesh step during minkowski would better match what people actually want.
<InPhase> Minkowski is essentially the one operation where $fa and $fs are not really honored.
<pca006132> J24k29: when you view everything as exact, yes, but previously manifold has less precision (larger epsilon) and will aggressively remesh boolean results, so minkowski was faster due to less vertices
<pca006132> but another potential issue might be in the mesh simplification part of manifold, where we are not simplifying enough
<pca006132> as the boolean algorithm can generate many degenerate triangles that other algorithms, e.g. CGAL's, do not like
<gbruno> [github] pca006132 pushed 1 modifications (another wrong failure) https://github.com/openscad/openscad/commit/0e5f5cab71d9f9b6c3be077e71741a95b9a8a370
<gbruno> [github] pca006132 synchronize pull request #5282 (updated manifold to latest version with double precision floating point) https://github.com/openscad/openscad/pull/5282
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<guso78k> how can I safely store std::shared_ptr<const Context> into a void* variable and recover it later while making sure, its not freed in the meantime ?
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<gbruno> [github] hzeller opened issue #5284 (Allow to `find_package()` manifold) https://github.com/openscad/openscad/issues/5284
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<Scopeuk> guso78 I think you would have to manage the shared pointer, i.e. some sort of wrapper object that takes a copy of the shared point until your raw pointer is released/ready to be released
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<gbruno> [github] hzeller opened pull request #5285 (Use manifold headers relative to path manifold/...) https://github.com/openscad/openscad/pull/5285
<gbruno> [github] hzeller converted_to_draft pull request #5285 (Use manifold headers relative to path manifold/...) https://github.com/openscad/openscad/pull/5285
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