e36c4d3a3b
osgGA. My approach is to bundle all touchpoints into one custom data structure which is attached to an GUIEventAdapter. The current approach simulates a moving mouse for the first touch-point, so basic manipulators do work, sort of. I created a MultiTouchTrackballManipulator-class, one touch-point does rotate the view, two touch-points pan and zoom the view as known from the iphone or other similar multi-touch-devices. A double-tap (similar to a double-click) resets the manipulator to its home-position. The multi-touch-trackball-implementation is not the best, see it as a first starting point. (there's a demo-video at http://vimeo.com/15017377 )"
48 lines
1.6 KiB
C++
48 lines
1.6 KiB
C++
/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2010 Robert Osfield
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*
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* This library is open source and may be redistributed and/or modified under
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* the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or
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* (at your option) any later version. The full license is in LICENSE file
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* included with this distribution, and on the openscenegraph.org website.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* OpenSceneGraph Public License for more details.
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*/
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#ifndef OSGGA_MULTITOUCH_TRACKBALL_MANIPULATOR
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#define OSGGA_MULTITOUCH_TRACKBALL_MANIPULATOR 1
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#include <osgGA/TrackballManipulator>
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namespace osgGA {
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class OSGGA_EXPORT MultiTouchTrackballManipulator : public TrackballManipulator
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{
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typedef TrackballManipulator inherited;
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public:
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MultiTouchTrackballManipulator( int flags = DEFAULT_SETTINGS );
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MultiTouchTrackballManipulator( const MultiTouchTrackballManipulator& tm,
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const osg::CopyOp& copyOp = osg::CopyOp::SHALLOW_COPY );
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META_Object( osgGA, MultiTouchTrackballManipulator );
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bool handle( const GUIEventAdapter& ea, GUIActionAdapter& us );
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protected:
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void handleMultiTouchDrag(GUIEventAdapter::TouchData* now, GUIEventAdapter::TouchData* last, const double eventTimeDelta);
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osg::ref_ptr<GUIEventAdapter::TouchData> _lastTouchData;
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};
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}
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#endif /* OSGGA_MULTITOUCH_TRACKBALL_MANIPULATOR */
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