1) For a while now we've been using a calculated seg count from a given
maxError, and a correction factor to push the radius out so that all
the error is outside the arc/circle. However, the second calculation
(which pre-dates the first) is pretty much just the inverse of the first
(and yields nothing more than maxError back). This is particularly
sub-optimal given the cost of trig functions.
2) There are a lot of old optimizations to reduce segcounts in certain
situations, someting that our error-based calculation compensates for
anyway. (Smaller radii need fewer segments to meet the maxError
condition.) But perhaps more importantly we now surface maxError in the
UI and we don't really want to call it "Max deviation except when it's
not".
3) We were also clamping the segCount twice: once in the calculation
routine and once in most of it's callers. Furthermore, the caller
clamping was inconsistent (both in being done and in the clamping
value). We now clamp only in the calculation routine.
4) There's no reason to use the correction factors in the 3Dviewer;
it's just a visualization and whether the polygonization error is
inside or outside the shape isn't really material.
5) The arc-correction-disabling stuff (used for solder mask layer) was
somewhat fragile in that it depended on the caller to turn it back on
afterwards. It's now only exposed as a RAII object which automatically
cleans up when it goes out of scope.
6) There were also bugs in a couple of the polygonization routines where
we'd accumulate round-off error in adding up the segments and end up with
an overly long last segment (which of course would voilate the error
max). This was the cause of the linked bug and also some issues with vias
that we had fudged in the past with extra clearance.
Fixes https://gitlab.com/kicad/code/kicad/issues/5567
... 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
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.
1) Don't try and do board-edge clearance checking against a
synthetic polygon constructed because we didn't find any edges.
2) Check pads against board edge.
3) Don't report vias as "Track too close to board edge".
This corrects an issue with fill segments-per-circle and moves the error
to segmetns calculation down in a number of functions to expose the
single value for approximation
Commit 1858b7dca corrected the handling of polygons on the edge cut
layer for board items. This adjusts for the possibility of polygons
in modules on the edge cut layer by applying the module offset/rotation
to the polygon elements.
Like circles, polygons are self-closed elements that define an outline.
This allows them to be used as such for board outlines and cutouts.
Fixes: lp:1795563
* https://bugs.launchpad.net/kicad/+bug/1795563
This adds a check for contiguous board outlines to the DRC. It also
uses the calculated outline to ensure that traces are not crossing the
outlines.
Fixes: lp:1648055
* https://bugs.launchpad.net/kicad/+bug/1648055
Ian McInerney
Jeff Young
qu1ck
Seth Hillbrand
Mark Roszko
Seth Hillbrand
jean-pierre charras
Maciej Suminski