https://bugs.kde.org/show_bug.cgi?id=423778
Tymond <tamtamy.tym...@gmail.com> changed:
What |Removed |Added
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Keywords| |triaged
CC| |tamtamy.tym...@gmail.com
--- Comment #1 from Tymond <tamtamy.tym...@gmail.com> ---
Ok, so it looks like there is a little bug that mouse gets the value "0.0"
instead of "0.5" like my tablet pen that doesn't support this type of pressure.
However from the code, I cannot see how this bug is there.
Qt's documentation:
https://doc.qt.io/archives/qt-4.8/qtabletevent.html#tangentialPressure , so it
returns a value in range (-1, 1)
Then Krita in
https://invent.kde.org/graphics/krita/-/blob/master/libs/flake/KoPointerEvent.cpp#L179
(KoPointerEvent::tangentialPressure()) returns a value:
fmod( (x+1)/2 , 2), which is in range (0,1), with -1 => 0, 1 => 1. (0, being
the neutral one, is converted to 0.5).
However Qt's documentation says: "Current airbrushes can only move in the
positive direction from the neutrual position."
That could explain half of the range... but if it was the half (0.5,1.0), not
(0,0.5).
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