They are used for chamfered round rect pads, and can be used for custom shaped pads.
No actual change currently, but the shape rotation of custom pads and chamfered rr pads
can be now used in gerber plots.
Setting a line thickness = 0 for graphic objects (circle, rect, line) is
allowed but creates issues for circles that were plotted a non filled shapes
but having a outline thickness = 0.
This is a board file format change to account for the new properties.
Also, we now only store the critical information about the dimension's
geometry in the board, rather than storing every drawn line.
The DIMENSION object is now an abstract base, and ALIGNED_DIMENSION
is the implementation that exists today (we will add more dimension
types in the future)
... instead of modifying the argument.
This will make the method usable in python API and will not incur
permormance penalty because named return value optimization (NRVO)
is a thing since C++11.
But even if copy is not elided vector is moved instead of copied.
https://en.cppreference.com/w/cpp/language/copy_elision
- Clear object attributes before and after plotting a zone.
It avoid using previously defined object attributes when plotting the next zone,
and using therefore incorrect attributes.
- Add aperture attribute to filled zone solid polygons (regions in Gerber)
There were a lot of plotters, exporters, etc. that were rolling their
own implementations.
This also introduces a lazily-built set of SHAPE objects for doing
collision detection and some forms of rendering (and later DRC).
It's currently only supported in the Footprint Editor. It could be
easily added to the board editor (all the code is there), but the board
editor is a little short on room in the drawing tools toolbar.
Previously, all overlapping polygons (pads and min thickness areas to remove) were
merged.
Drawback: pads attributes are lost. In Gerber this is annoying.
Now the pads are plot as flashed or Regions items, and min thickness areas are added
but shapes are not merged and keep their attributes.
Previously, the region was a usual polygon with arc approximated by segment.
Using a region with arcs is a better way because it allows CAM tools to
identify this region as a round-rect pad.
A side effect is a better shape and smaller files, however not really noticeable in fact.