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DolphinQt: Fix accelerometer indicator math.

This commit is contained in:
Jordan Woyak 2020-01-03 12:34:11 -06:00
parent 540a3ce665
commit 120c6dc850
1 changed files with 4 additions and 5 deletions
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9
Source/Core/DolphinQt/Config/Mapping/MappingIndicator.cpp
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@ -724,12 +724,11 @@ void AccelerometerMappingIndicator::paintEvent(QPaintEvent*)
p.setRenderHint(QPainter::SmoothPixmapTransform, true);
const auto angle = std::acos(state.Normalized().Dot({0, 0, 1}));
const auto axis = state.Normalized().Cross({0, 0, 1}).Normalized();
const auto axis = state.Normalized().Cross({0, 0, 1});
// Odd checks to handle case of 0g (draw no sphere) and perfect up/down orientation.
const auto rotation = (!state.LengthSquared() || axis.LengthSquared() < 2) ?
Common::Matrix33::Rotate(angle, axis) :
Common::Matrix33::Identity();
// Check that axis is non-zero to handle perfect up/down orientations.
const auto rotation = Common::Matrix33::Rotate(
angle, axis.LengthSquared() ? axis.Normalized() : Common::Vec3{0, 1, 0});
// Draw sphere.
p.setPen(Qt::NoPen);