void StackedTransform::update(float t)
{
int dirty = 0;
for (StackedTransform::iterator it = begin(); it != end(); ++it)
{
StackedTransformElement* element = it->get();
if (!element)
continue;
// update and check if there are changes
element->update(t);
if (element->isIdentity())
continue;
dirty++;
}
if (!dirty)
return;
// dirty update matrix
_matrix.makeIdentity();
for (StackedTransform::iterator it = begin(); it != end(); ++it)
{
StackedTransformElement* element = it->get();
if (!element || element->isIdentity())
continue;
element->applyToMatrix(_matrix);
}
}
bool UpdateMatrixTransform::link(osgAnimation::Channel* channel)
{
const std::string& channelName = channel->getName();
// check if we can link a StackedTransformElement to the current Channel
for (StackedTransform::iterator it = _transforms.begin(); it != _transforms.end(); ++it)
{
StackedTransformElement* element = it->get();
if (element && !element->getName().empty() && channelName == element->getName())
{
Target* target = element->getOrCreateTarget();
if (target && channel->setTarget(target))
return true;
}
}
OSG_INFO << "UpdateMatrixTransform::link Channel " << channel->getName() << " does not contain a symbolic name that can be linked to a StackedTransformElement." << std::endl;
return false;
}