Hi Glenn,
Am 07.02.11 12:06, schrieb Serge Lages:
> I am currently working on getting multi-touch working on Linux with MPX
> (XInput2), and I would like to use this new system for my events. But with
> XInput (or also with Windows 7), I am receiving all the events separately,
> so what's the best approach to feed the
> touchesBegan/touchesMoved/touchesEnded methods ? Will I need to store each
> input state internally into the GraphicWindow class to set each time all the
> touch states ?
You'll have to store your touch-points and submit them alltogether as
one event to the eventqueue, here's some pseudo-code:
osg::ref_ptr<osgGA::GUIEventAdapter> osg_event(NULL);
for(int i = 0; i < numTouches; i++)
{
// get touch i and corrsponding phase, x and y
...
// feed it to the osg_event
if (!osg_event) {
osg_event = _win->getEventQueue()->touchBegan(i, phase, x, y);
} else {
osg_event->addTouchPoint(i, phase, x, y);
}
}
As Paul noticed in one of his recent mails, the design of the current
implementation is not the easiest and cleanest, but I was happy to have
something working on my end. So if you have any improvements to the
design/code, please share them with us, so we get a robust and clean
multi-touch implementation working consistent on different platforms.
cheers,
Stephan
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