void TDragger::drag()
{
projector.setViewVolume(this->getViewVolume());
projector.setWorkingSpace(this->getLocalToWorldMatrix());
SbVec3f hitPoint = projector.project(getNormalizedLocaterPosition());
SbVec3f startingPoint = getLocalStartingPoint();
SbVec3f localMovement = hitPoint - startingPoint;
//scale the increment to match local space.
float scaledIncrement = static_cast<float>(translationIncrement.getValue()) / autoScaleResult.getValue();
localMovement = roundTranslation(localMovement, scaledIncrement);
//when the movement vector is null either the appendTranslation or
//the setMotionMatrix doesn't work. either way it stops translating
//back to its initial starting point.
if (localMovement.equals(SbVec3f(0.0, 0.0, 0.0), 0.00001f))
{
setMotionMatrix(getStartMotionMatrix());
//don't know why I need the following but if I don't have it
//it won't return to original position.
this->valueChanged();
}
else
setMotionMatrix(appendTranslation(getStartMotionMatrix(), localMovement));
Base::Quantity quantity(
static_cast<double>(translationIncrementCount.getValue()) * translationIncrement.getValue(), Base::Unit::Length);
QString message(QObject::tr("Translation: "));
message += quantity.getUserString();
getMainWindow()->showMessage(message, 3000);
}
