Rounded line ends when deflating leads to microscopic jags in the
outline that are not visible but add substantial computation time and
minor error when computing polygon offsets.
Instead, the chamfer deflate method prevents these jagged lines by
clipping angles < 90° by the error level. This does not impact deflate
calls where we explicitly require the angles to be maintained
Nominally, the zcode of a vertex is unique. This is not 100% true,
however, as we must interlace two 32-bit numbers into a single 32-bit
number. Sorting needs to account for the possibility that the zcode
will be the same while other elements of the vertex are different. This
commit fixes the broken boolean logic to more clearly handle these cases
Fixes https://gitlab.com/kicad/code/kicad/issues/13867
Just testing a single point to find copper that is outside the board works
until the arc->segment conversion moves the board outline just enough to
have the filled copper slightly (few IU) outside of the converted outline.
Instead, we do an expensive check of comparing the size of the
intersection between the island and the island's intersection with the
board. If the intersection is at least half as large as the original
island, we can say with certainty that the island is inside. The margin
could be much smaller than half but this preserves the intent without
picking an arbitrary number that might be violated
Fixes https://gitlab.com/kicad/code/kicad/issues/13717
The segment iterator creates segments when needed, so using it in a dual
loop creates NlgN more copies than we need. This shifts to a single
copy algorithm that then uses a sorting to preemptively abort the search
once the segments are outside of the search bounding box
Fixes https://gitlab.com/kicad/code/kicad/issues/13191
For unknown reasons, Clipper2 only returns Paths structures from the
ClipperOffset::Execute routine. Further, the Paths are not properly
ordered (outline->hole in outline, outline2->hole in outline2).
To get proper hierarchy, we need to run an additional pass of the
solution with the paths as Subject in a null union. This is effectively
a Simplify() call but we keep the data in Clipper format to reduce the
churn/calc time
In Clipper1, we had a flat tree structure on returns. Clipper2 nests
these, so we need to properly handle the nesting structure when
importing the polygons
Currently this lives behind the advanced config flag `UseClipper2`.
Enabling this flag will route all Clipper-based calls through the
Clipper2 library instead of the older Clipper. The changes should be
mostly transparent.
Of note, Clipper2 does not utilize the `STRICTLY_SIMPLE` flag because
clipper1 did not actually guarantee a strictly simple polygon.
Currently we ignore this flag but we may decide to run strictly-simple
operations through a second NULL union to simplify the results as much
as possible.
Additionally, the inflation options are slightly different. We cannot
choose the fallback miter. The fallback miter is always square. This
only affects the CHAMFER_ACUTE_CORNERS option in inflate, which does not
appear to be used.
Lastly, we currently utilize the 64-bit integer coordinates for
calculations. This appears to still be faster than 32-bit calculations
in Clipper1 on a modern x86 system. This may not be the case for older
systems, particularly 32-bit systems.
Oh dear, there was a bunch going on here. Firstly the move from int
to long long int for ValueFromString() means that we were no longer
catching overflows (as we were C-style casting it back to int in many
places). But even when the overflow is caught, it would run in to
wxWidgets' empty string bug while trying to log it.
Fixes https://gitlab.com/kicad/code/kicad/issues/12577
Tomasz Wlostowski
Nimish Telang
Seth Hillbrand
Ian McInerney
Jon Evans
Jeff Young
Marek Roszko
Roberto Fernandez Bautista
Vincenzo Fortunato
Alex
Jonathan Haas