void RDragger::drag()
{
projector.setViewVolume(this->getViewVolume());
projector.setWorkingSpace(this->getLocalToWorldMatrix());
SbVec3f hitPoint;
if (!projector.tryProject(getNormalizedLocaterPosition(), 0.0, hitPoint))
return;
hitPoint.normalize();
SbVec3f startingPoint = getLocalStartingPoint();
startingPoint.normalize();
SbRotation localRotation(startingPoint, hitPoint);
//getting some slop from this. grab vector and put it absolute.
SbVec3f tempVec;
float tempRadians;
localRotation.getValue(tempVec, tempRadians);
tempVec[0] = 0.0;
tempVec[1] = 0.0;
tempVec.normalize();
if (tempVec[2] < 0.0)
{
tempRadians *= -1.0;
tempVec.negate();
}
int incrementCount = roundIncrement(tempRadians);
rotationIncrementCount.setValue(incrementCount);
localRotation = SbRotation(tempVec, incrementCount * static_cast<float>(rotationIncrement.getValue()));
//same problem as described in tDragger::drag.
if (localRotation.equals(SbRotation(SbVec3f(0.0, 0.0, 1.0), 0.0), 0.00001f))
{
setMotionMatrix(getStartMotionMatrix());
this->valueChanged();
}
else
setMotionMatrix(appendRotation(getStartMotionMatrix(), localRotation, SbVec3f(0.0, 0.0, 0.0)));
Base::Quantity quantity(
static_cast<double>(rotationIncrementCount.getValue()) * (180.0 / M_PI) *
rotationIncrement.getValue(), Base::Unit::Angle);
QString message(QObject::tr("Rotation: "));
message += quantity.getUserString();
getMainWindow()->showMessage(message, 3000);
}
