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Artifacts and inconsistent layers #2948

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alranel opened this issue Jun 23, 2015 · 8 comments

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commented Jun 23, 2015

Reported by @napter:

I found a similar issue where all the layers are not consistent. I'm not sure if it's the same issue, this is a weird one. Slice the model and it prints with the issues in the top right picture - missing parts of layers and extra blobs in the GCode. Then rotate the model, as you can see the orientation in the bottom set is rotated 180 degrees, and the issues go away and it slices and prints perfectly. config file and STL file
slic3r issue

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commented Mar 17, 2016

Shouldn't there be yellow top fill on top of the pink areas too?

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commented Mar 17, 2016

Yellow is always perimeters.
On Mar 16, 2016 11:42 PM, "Daniel" notifications@github.com wrote:

Shouldn't there be yellow top fill on top of the pink areas too?


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#2948 (comment)

@alranel alranel added this to the 1.2.10 milestone Mar 26, 2016

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commented Dec 21, 2016

This issue is still present as of current master and can be reproduced with default settings.

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commented Dec 21, 2016

Interesting. A few edges are missing from the Voronoi diagram:

schermata 2016-12-21 alle 18 19 51

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commented Dec 21, 2016

Simpler model that reproduces the issue: fence_cut.stl.zip
SVG file of the Voronoi diagram of last layer (default settings): voronoi.svg.zip

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commented Dec 21, 2016

Reported to the upstream maintainers: https://svn.boost.org/trac/boost/ticket/12707
I'm afraid Boost Voronoi is unmaintained. I wish @asydorchuk could take a look at those two pending bugs...

@alranel alranel removed this from the 1.2.10 milestone Dec 21, 2016

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commented Dec 21, 2016

I can look at its usage and perhaps converting to a different library? My quick search turned up a couple other OS voronoi tesselation implementations: http://math.lbl.gov/voro++/ is one and it's BSD-licensed.

There's been some significant changes as well to the Boost build system since 1.60 IIRC, at least I had problems getting it built on Win32, I think that either the syntax changed or that building with mingw broke at some point. I will have to look at it again though to be sure.

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commented Dec 21, 2016

That Voro++ looks even less maintained :) and it's 3D so I'm not sure it fits our environment.

I actually like Boost Voronoi because it's numerically robust, fast, nicely coded and documented, and uses our native types thanks to traits. And so far I had never found a bug :-(

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