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Added arrow key support. Added support for using ctrl and shift keys to modulate how senstive the mouse and key movement is when modifying the keystone parameters.

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This commit is contained in:
Robert Osfield 2013-03-20 14:03:28 +00:00
parent 7aad7dfd78
commit bc3cff2406
1 changed files with 125 additions and 68 deletions
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125
examples/osgkeystone/osgkeystone.cpp
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@ -20,8 +20,10 @@
#include <osg/io_utils>
#include <osgDB/ReadFile>
#include <osgGA/StateSetManipulator>
#include <osgGA/TrackballManipulator>
#include <osgViewer/Viewer>
#include <osgViewer/ViewerEventHandlers>
class ControlPoints : public osg::Referenced
@ -196,10 +198,20 @@ public:
CENTER
};
osg::Vec2d incrementScale(const osgGA::GUIEventAdapter& ea) const;
Region computeRegion(const osgGA::GUIEventAdapter& ea) const;
void move(Region region, const osg::Vec2d& delta);
protected:
osg::ref_ptr<Keystone> _keystone;
osg::Vec2d _defaultIncrement;
osg::Vec2d _ctrlIncrement;
osg::Vec2d _shiftIncrement;
osg::Vec2d _keyIncrement;
osg::Vec2d _startPosition;
osg::ref_ptr<ControlPoints> _startControlPoints;
@ -210,62 +222,47 @@ protected:
KeystoneHandler::KeystoneHandler(Keystone* keystone):
_keystone(keystone),
_defaultIncrement(0.0,0.0),
_ctrlIncrement(1.0,1.0),
_shiftIncrement(0.1,0.1),
_keyIncrement(0.005, 0.005),
_selectedRegion(NONE_SELECTED)
{
_startControlPoints = new ControlPoints;
_currentControlPoints = new ControlPoints;
}
bool KeystoneHandler::handle(const osgGA::GUIEventAdapter& ea, osgGA::GUIActionAdapter& aa)
{
switch(ea.getEventType())
{
case(osgGA::GUIEventAdapter::PUSH):
{
if (ea.getModKeyMask()==osgGA::GUIEventAdapter::MODKEY_LEFT_CTRL || ea.getModKeyMask()==osgGA::GUIEventAdapter::MODKEY_RIGHT_CTRL )
KeystoneHandler::Region KeystoneHandler::computeRegion(const osgGA::GUIEventAdapter& ea) const
{
float x = ea.getXnormalized();
float y = ea.getYnormalized();
if (x<-0.33)
{
// left side
if (y<-0.33) _selectedRegion = BOTTOM_LEFT;
else if (y<0.33) _selectedRegion = LEFT;
else _selectedRegion = TOP_LEFT;
if (y<-0.33) return BOTTOM_LEFT;
else if (y<0.33) return LEFT;
else return TOP_LEFT;
}
else if (x<0.33)
{
// center side
if (y<-0.33) _selectedRegion = BOTTOM;
else if (y<0.33) _selectedRegion = CENTER;
else _selectedRegion = TOP;
if (y<-0.33) return BOTTOM;
else if (y<0.33) return CENTER;
else return TOP;
}
else
{
// right side
if (y<-0.33) _selectedRegion = BOTTOM_RIGHT;
else if (y<0.33) _selectedRegion = RIGHT;
else _selectedRegion = TOP_RIGHT;
if (y<-0.33) return BOTTOM_RIGHT;
else if (y<0.33) return RIGHT;
else return TOP_RIGHT;
}
(*_startControlPoints) = (*_currentControlPoints);
_startPosition.set(x,y);
OSG_NOTICE<<"Region "<<_selectedRegion<<std::endl;
return NONE_SELECTED;
}
else
void KeystoneHandler::move(Region region, const osg::Vec2d& delta)
{
_selectedRegion = NONE_SELECTED;
}
return false;
}
case(osgGA::GUIEventAdapter::DRAG):
{
if (_selectedRegion!=NONE_SELECTED)
{
(*_currentControlPoints) = (*_startControlPoints);
osg::Vec2d currentPosition(ea.getXnormalized(), ea.getYnormalized());
osg::Vec2d delta(currentPosition-_startPosition);
OSG_NOTICE<<"Moving region "<<_selectedRegion<<", moving by "<<currentPosition-_startPosition<<std::endl;
switch(_selectedRegion)
switch(region)
{
case(TOP_LEFT):
_currentControlPoints->top_left += delta;
@ -305,6 +302,43 @@ bool KeystoneHandler::handle(const osgGA::GUIEventAdapter& ea, osgGA::GUIActionA
break;
}
_keystone->updateKeystone(*_currentControlPoints);
}
osg::Vec2d KeystoneHandler::incrementScale(const osgGA::GUIEventAdapter& ea) const
{
if (_ctrlIncrement!=osg::Vec2d(0.0,0.0) && (ea.getModKeyMask()==osgGA::GUIEventAdapter::MODKEY_LEFT_CTRL || ea.getModKeyMask()==osgGA::GUIEventAdapter::MODKEY_RIGHT_CTRL )) return _ctrlIncrement;
if (_shiftIncrement!=osg::Vec2d(0.0,0.0) && (ea.getModKeyMask()==osgGA::GUIEventAdapter::MODKEY_LEFT_SHIFT || ea.getModKeyMask()==osgGA::GUIEventAdapter::MODKEY_RIGHT_SHIFT )) return _shiftIncrement;
return _defaultIncrement;
}
bool KeystoneHandler::handle(const osgGA::GUIEventAdapter& ea, osgGA::GUIActionAdapter& aa)
{
switch(ea.getEventType())
{
case(osgGA::GUIEventAdapter::PUSH):
{
osg::Vec2d scale = incrementScale(ea);
if (scale.length2()!=0.0)
{
_selectedRegion = computeRegion(ea);
(*_startControlPoints) = (*_currentControlPoints);
_startPosition.set(ea.getXnormalized(),ea.getYnormalized());
}
else
{
_selectedRegion = NONE_SELECTED;
}
return false;
}
case(osgGA::GUIEventAdapter::DRAG):
{
if (_selectedRegion!=NONE_SELECTED)
{
(*_currentControlPoints) = (*_startControlPoints);
osg::Vec2d currentPosition(ea.getXnormalized(), ea.getYnormalized());
osg::Vec2d delta(currentPosition-_startPosition);
osg::Vec2d scale = incrementScale(ea);
move(_selectedRegion, osg::Vec2d(delta.x()*scale.x(), delta.y()*scale.y()) );
return true;
}
@ -312,7 +346,6 @@ bool KeystoneHandler::handle(const osgGA::GUIEventAdapter& ea, osgGA::GUIActionA
}
case(osgGA::GUIEventAdapter::RELEASE):
{
OSG_NOTICE<<"Mouse released "<<std::endl;
_selectedRegion = NONE_SELECTED;
return false;
}
@ -325,6 +358,22 @@ bool KeystoneHandler::handle(const osgGA::GUIEventAdapter& ea, osgGA::GUIActionA
_currentControlPoints->reset();
_keystone->updateKeystone(*_currentControlPoints);
}
else if (ea.getKey()==osgGA::GUIEventAdapter::KEY_Up)
{
move(computeRegion(ea), osg::Vec2d(0.0, _keyIncrement.y()*incrementScale(ea).y()) );
}
else if (ea.getKey()==osgGA::GUIEventAdapter::KEY_Down)
{
move(computeRegion(ea), osg::Vec2d(0.0, -_keyIncrement.y()*incrementScale(ea).y()) );
}
else if (ea.getKey()==osgGA::GUIEventAdapter::KEY_Left)
{
move(computeRegion(ea), osg::Vec2d(-_keyIncrement.x()*incrementScale(ea).x(), 0.0) );
}
else if (ea.getKey()==osgGA::GUIEventAdapter::KEY_Right)
{
move(computeRegion(ea), osg::Vec2d(_keyIncrement.x()*incrementScale(ea).x(), 0.0) );
}
return false;
}
default:
@ -367,6 +416,13 @@ int main( int argc, char **argv )
viewer.setSceneData(model.get());
// add the state manipulator
viewer.addEventHandler( new osgGA::StateSetManipulator(viewer.getCamera()->getOrCreateStateSet()) );
// add the stats handler
viewer.addEventHandler(new osgViewer::StatsHandler);
// add camera manipulator
viewer.setCameraManipulator(new osgGA::TrackballManipulator());
viewer.realize();
@ -375,6 +431,7 @@ int main( int argc, char **argv )
osg::Matrixd original_pm = viewer.getCamera()->getProjectionMatrix();
// Add keystone handler
viewer.addEventHandler(new KeystoneHandler(keystone));
while(!viewer.done())