There is a Multitouch trackball, but is not used in Android example. 2012/6/26 Christian Buchner <[email protected]>
> I've been thinking about this problem as well, as there is currently > no generic multi touch capable > camera manipulator. In my application I would need something like the > terrain manipulator, but > capable of handling two touch points. > > Multitouch dragging/rotation could be implemented by alternating > processing of both touch points. > > Alternate between those two checks > If touch point 2 moved, rotate around point 2, using point 1 as a > fixed rotational center. > If touch point 1 moved, rotate around point 1, using point 2 as a > fixed rotational center. > > If only one touch point is detected, keep using the old trackball > algorithm with the default rotation > center > > More than two touch points? -> kernel panic ;) > > Christian > > 2012/6/13 Nav Joseph <[email protected]>: > > Sounds more like an algorithm solution than an osg solution. > > The below algo isn't perfect, but it'll give you an idea. > > > > finger1=false; > > finger2=false; > > > > while(checkForFingerPressRelease) > > { > > if (finger1pressed) finger1=true; > > if (finger2pressed) finger2=true; > > if (finger1released) finger1=false; > > if (finger2released) finger2=false; > > > > if (finger1 && finger2) > > { > > check for dragging of finger2 and rotate > > else > > check for dragging of finger1 and rotate > > } > > > > }//while > > > > ------------------ > > Read this topic online here: > > http://forum.openscenegraph.org/viewtopic.php?p=48265#48265 > > > > > > > > > > > > _______________________________________________ > > osg-users mailing list > > [email protected] > > > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > _______________________________________________ > osg-users mailing list > [email protected] > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org >
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