for the Slic3r Prusa Edition.
Hopefully a fix of https://github.com/prusa3d/Slic3r/issues/258
by moving the 2D thumbnail generation to the main thread and
forcing the simple 2D convex hull for even the small objects.
If the "interface_shells" feature is disabled, the "ensure vertical wall thickness"
feature will not add full infill over internal shells.
Fixed some issues with delayed loading of 3d scenes.
When extruding supports, the support is interleaved with interface
if possible (when extruded with the same extruder).
Otherwise the base is extruded first.
Clamp these values between the minimum of min_layer_height per nozzle
and the maximum of max_layer_height per nozzle.
Don't allow entering zero layer height to trim an object,
the cut dialog should be used instead.
Fixes https://github.com/prusa3d/Slic3r/issues/235
Reset the layer height profile when changing a print profile to an incompatible one.
Reset button on the layer height bar.
Fixed an update issue on zooming by a scroll wheel.
Fixed an issue when loading an AMF file: Object names are now retained.
This is similar to an ExtrusionLoop, but it is open.
It may contain multiple chained paths with differing parameters.
This allows one to have a hierarchy of paths, where the ExtrusionEntityCollection
will be chained by the G-code generator, but ExtrusionMultiPath will not.
inside ClipperUtils are now using bit shifts instead of multiplication
by doubles, which makes the scaling precise.
Removed the scale parameter from all offset functions.
Modified the safety offset to calculate offset per polygon instead
of over all polygons at once. The old way was not safe and very slow,
sometimes this meant a kiss of death for supports for example.
Crashes while switching in preview through layers with arrow keys
Also added a check box to visualize a single layer only
in the 3D path view. The check box may be toggled with a 'S' key.
Added shift+U / shift+D buttons in the 3D path view to show a single
layer only.
