alpha3_prerelease

• Overhang printing has some really big improvements:
  • The Bridge detector now includes pedestal detection, it is used for from-central arc printing (see discussion alpha 3 anouncement)
  • Arc infill makes a lot less errors in path planning, it for me always prints in the right direction
  • Parameters of the bridge detector scoring are now changeable (see 'print settings' -> 'output options' -> 'bridge detection scoring'), change them and see if the detected bridge angles get better. This table is an optimization issue, I have to think hard to find a way to solve this with logic instead of making up 'magic numbers' like this, but for now it works pretty ok, and is improvabnle with some extra post-processing code later if i can't think of a fundamental improved way.
  • Added more lighting of the previews
  • Small improvements, speedups mostly

IMPORTANT NOTICE: this is the last version of the alpha-cycle and the last SuperSlicer-based Pleccer, I am moving to using PrusaSlicer as base for Pleccer, it offers some great features (like tree support, arachne, etc). It now might take a while for a new version (first beta) to come out though as I have a lot to do.

NOTICE: I've added a test model collection that should be printable, just make sure you set the flow rate to a lower value and set the bridge speed low enough.