From Stephan Huber, "attached are some fixes to the osc-plugin and the touch-implementations for iOS and os x and other small bugfixes. These fixes will normalize the orientation of the touch points, and transmitting the touch points over osc via the TUIO-protocol works now more robustly between two osg-applications.

I added a new tag to p3d called forward_touch_event_to_device and renamed the existing forward_event_to_device to forward_mouse_event_to_device. This new tag will transmit touches to the virtual trackpad as touch events. I added the MultitouchTrackball to the p3d-app so zooming and moving a model remotely should now work, if you use forward_touch_event_to_device. I kept (and fixed) forward_mouse_event_to_device for background compatibility, so old presentations works as in previous versions, without the ability to zoom + scale. of course.

forward_touch_event_to_device needs some more testing, (e.g. with image-streams and keystone, afaik there’s no support for touch-events...) but for a first version it works nice.
"

src/osgGA/GUIEventAdapter.cpp

@@ -67,8 +67,11 @@ GUIEventAdapter::GUIEventAdapter(const GUIEventAdapter& rhs,const osg::CopyOp& c
     _mouseYOrientation(rhs._mouseYOrientation),
     _scrolling(rhs._scrolling),
     _tabletPen(rhs._tabletPen),
-    _touchData(rhs._touchData)
-{}
+    _touchData(NULL)
+{
+    if(TouchData* td = rhs.getTouchData())
+        setTouchData(osg::clone(td, copyop));
+}
 
 GUIEventAdapter::~GUIEventAdapter()
 {