This selection improvement feature is hidden behind the advanced
configuration key "PcbSelectionVisibilityRatio". It is turned off (1.0)
by default. Value values are from 0.0 to less that 1.0. From testing,
using a value between 0.1 and 0.3 produces the best results.
This fix uses normal alpha blending described in the link below. The
current design only uses the alpha of the object's color. It could be
improved by doing a full color alpha blending but using the color alpha
alone seems to result in satisfactory results.
https://en.wikipedia.org/wiki/Alpha_compositing
Fixes https://gitlab.com/kicad/code/kicad/-/issues/16126
The old bottom to top layer stack up sequence from back to front layer was
only used for plotting so it was renamed appropriately. This will be used
for future board object select disambiguation improvements.
stdlib checks do not allow dereferencing the first element of a vector
when there are no elements in the vector (regardless of whether we have
allocated memory for them). This whole function is rather
over-engineered, setting up multiple allocations and branches depending
of the string size. This commit reduces the function to the actions
needed (get the string size, print it into the output)
Only special strings starting with a dot are supported. Parsing of concatenated special strings using quotes needs to be implemented, but at least a few test-cases are already there now.
While the bug has been fixes, the winding handling in the
SetArcGeometry() function isn't tested. This adds a regression
test on EDA_SHAPE, which is where the logic now lives.
Relates-To: https://gitlab.com/kicad/code/kicad/-/issues/15694
Alex Shvartzkop
Thomas Pointhuber
Marek Roszko
Roberto Fernandez Bautista
Ian McInerney
Wayne Stambaugh
Jon Evans
Seth Hillbrand
John Beard