Alessandro Ranellucci comments

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                                            Alessandro Ranellucci

Lazy union (aka. no implicit union)

You could perform an intersection between the projections of the objects onto the ground, but that would detect many false positives. Not sure how you would use Clipper for that...

Documentation for stream.find() and derivatives is too sparse

This issue should be moved to https://github.com/arduino/reference-en

Finish implementation of contains() function in PShape

I submitted a pull request for this one: #5549. Does this allow to document `contains()`?

Estimate build time with material needed

Unfortunately, Slic3r cannot estimate build time without knowing the motion implementation of your firmware, including its settings (speed/acceleration/jerk etc.)...

Wireframe printing (aka Low-Fi Printing)

Brilliant idea and implementation. And it's quite easy to implement actually...

Wireframe printing (aka Low-Fi Printing)

@kefir- and @kraczekj, usage of this for support or infill raises complicated issues about collision of extruder with non-wireframe printed parts...

Wireframe printing (aka Low-Fi Printing)

This was my initial attempt at it: https://github.com/alexrj/Slic3r/blob/wireframe/utils/wireframe.pl

Make sure first (bridging) solid layer above sparse infill is properly anchored

@DrLex0, any possible alternative to that behavior triggers more issues recursively. Actually, that issue never affected my prints in several years of printing and nobody else reported curlying plastic. Unsupported...

Weird moves in generated gcode with "Avoid crossing perimeters"

In the recent 893cab752362f58f49024e354a40f96dc4eff43e commit I restored travel path simplification which reduces the number of tiny segments you reported. I'll check your test case, especially about those crossings, however I...

Detect arcs and generate G2/G3

There are still some glitches in detection or arc center.