void
OrientationWatcher::changeHappened ()
{
if (!watching) {
return;
}
QOrientationReading * result = reading();
if (result) {
QOrientationReading::Orientation nextSetting = result->orientation();
if (lastSetting == nextSetting) {
return;
}
qreal degrees (0);
bool portrait (true);
bool doSignal (false);
bool inverted (false);
switch (nextSetting) {
case QOrientationReading::TopUp:
degrees = -90.0;
lastSetting = nextSetting;
doSignal = true;
break;
case QOrientationReading::TopDown:
degrees = 90;
lastSetting = nextSetting;
inverted = true;
doSignal = true;
break;
case QOrientationReading::LeftUp:
degrees = 180;
lastSetting = nextSetting;
doSignal = true;
portrait = false;
inverted = true;
break;
case QOrientationReading::RightUp:
degrees = 0;
lastSetting = nextSetting;
doSignal = true;
portrait = false;
break;
default:
break;
}
if (doSignal) {
emit rotationChange (degrees, portrait, inverted);
}
}
}
void SimpleMouseRotator::rotate(int x, int y)
{
// Account for change of original axes
Quaternion<float> previousRotation(viewpoint->getRotation());
previousRotation.inverse();
Vector3<float> xAxis;
Vector3<float> yAxis;
QuatUtil::rotateVector(previousRotation, verticalAxis, xAxis);
QuatUtil::rotateVector(previousRotation, horizontalAxis, yAxis);
Quaternion<float> rotationChange(0.0f, 0.0f, 0.0f, 1.0f);
Quaternion<float> xQuat;
xQuat.set(yAxis, (float)toRadians(angle));
if (previousX > x)
{
xQuat.inverse();
}
xQuat.normalize();
int xDelta = static_cast<int>(std::abs(static_cast<float>(previousX - x)));
for (int i = 0; i < xDelta; ++i)
{
rotationChange.multiply(xQuat);
}
Quaternion<float> yQuat;
yQuat.set(xAxis, (float)toRadians(angle));
if (previousY > y)
{
yQuat.inverse();
}
yQuat.normalize();
int yDelta = static_cast<int>(std::abs(static_cast<float>(previousY - y)));
for (int j = 0; j < yDelta; ++j)
{
rotationChange.multiply(yQuat);
}
rotationChange.normalize();
previousX = x;
previousY = y;
Quaternion<float> r(viewpoint->getRotation());
r.multiply(rotationChange);
r.normalize();
viewpoint->setRotation(r);
}
