65aee287e7
hpux. I have skipped irix this time as irix is too dead to keep osg building there. As usual, solaris does not like member templates in stl containers. Some headers missing and link problems due to missing libraries."
135 lines
4.3 KiB
C++
135 lines
4.3 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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#include <osgGA/MultiTouchTrackballManipulator>
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#include <osg/io_utils>
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using namespace osg;
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using namespace osgGA;
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/// Constructor.
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MultiTouchTrackballManipulator::MultiTouchTrackballManipulator( int flags )
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: inherited( flags )
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{
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setVerticalAxisFixed( false );
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}
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/// Constructor.
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MultiTouchTrackballManipulator::MultiTouchTrackballManipulator( const MultiTouchTrackballManipulator& tm, const CopyOp& copyOp )
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: inherited( tm, copyOp )
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{
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}
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void MultiTouchTrackballManipulator::handleMultiTouchDrag(GUIEventAdapter::TouchData* now, GUIEventAdapter::TouchData* last, const double eventTimeDelta)
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{
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const float zoom_threshold = 1.0f;
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osg::Vec2 pt_1_now(now->get(0).x,now->get(0).y);
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osg::Vec2 pt_2_now(now->get(1).x,now->get(1).y);
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osg::Vec2 pt_1_last(last->get(0).x,last->get(0).y);
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osg::Vec2 pt_2_last(last->get(1).x,last->get(1).y);
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float gap_now((pt_1_now - pt_2_now).length());
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float gap_last((pt_1_last - pt_2_last).length());
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// osg::notify(osg::ALWAYS) << gap_now << " " << gap_last << std::endl;
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if (fabs(gap_last - gap_now) >= zoom_threshold)
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{
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// zoom gesture
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zoomModel( (gap_last - gap_now) * eventTimeDelta, true );
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}
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// drag gesture
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osg::Vec2 delta = ((pt_1_last - pt_1_now) + (pt_2_last - pt_2_now)) / 2.0f;
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float scale = 0.2f * _distance * eventTimeDelta;
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// osg::notify(osg::ALWAYS) << "drag: " << delta << " scale: " << scale << std::endl;
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panModel( delta.x() * scale, delta.y() * scale * (-1)); // flip y-coord because of different origins.
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}
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bool MultiTouchTrackballManipulator::handle( const GUIEventAdapter& ea, GUIActionAdapter& us )
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{
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bool handled(false);
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switch(ea.getEventType())
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{
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case osgGA::GUIEventAdapter::PUSH:
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case osgGA::GUIEventAdapter::DRAG:
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case osgGA::GUIEventAdapter::RELEASE:
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if (ea.isMultiTouchEvent())
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{
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double eventTimeDelta = 1/60.0; //_ga_t0->getTime() - _ga_t1->getTime();
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if( eventTimeDelta < 0. )
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{
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OSG_WARN << "Manipulator warning: eventTimeDelta = " << eventTimeDelta << std::endl;
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eventTimeDelta = 0.;
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}
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osgGA::GUIEventAdapter::TouchData* data = ea.getTouchData();
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// three touches or two taps for home position
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if ((data->getNumTouchPoints() == 3) || ((data->getNumTouchPoints() == 1) && (data->get(0).tapCount >= 2)))
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{
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flushMouseEventStack();
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_thrown = false;
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home(ea,us);
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handled = true;
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}
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else if (data->getNumTouchPoints() >= 2)
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{
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if ((_lastTouchData.valid()) && (_lastTouchData->getNumTouchPoints() >= 2))
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{
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handleMultiTouchDrag(data, _lastTouchData.get(), eventTimeDelta);
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}
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handled = true;
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}
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_lastTouchData = data;
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// check if all touches ended
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unsigned int num_touches_ended(0);
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for(osgGA::GUIEventAdapter::TouchData::iterator i = data->begin(); i != data->end(); ++i)
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{
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if ((*i).phase == osgGA::GUIEventAdapter::TOUCH_ENDED)
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num_touches_ended++;
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}
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if(num_touches_ended == data->getNumTouchPoints())
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{
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_lastTouchData = NULL;
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}
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}
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break;
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default:
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break;
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}
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return handled ? handled : TrackballManipulator::handle(ea, us);
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}
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