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/* -*-c++-*- Present3D - Copyright (C) 1999-2006 Robert Osfield
*
* This software is open source and may be redistributed and/or modified under
* the terms of the GNU General Public License (GPL) version 2.0.
* The full license is in LICENSE.txt file included with this distribution,.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* include LICENSE.txt for more details.
*/
#include "PointsEventHandler.h"
#include <osg/Notify>
PointsEventHandler::PointsEventHandler()
{
_point = new osg::Point;
//_point->setDistanceAttenuation(osg::Vec3(0.0,0.0000,0.05f));
}
bool PointsEventHandler::handle(const osgGA::GUIEventAdapter& ea,osgGA::GUIActionAdapter&)
{
switch(ea.getEventType())
{
case(osgGA::GUIEventAdapter::KEYDOWN):
{
if (ea.getKey()=='+' || ea.getKey()==osgGA::GUIEventAdapter::KEY_KP_Add)
{
changePointSize(1.0f);
return true;
}
else if (ea.getKey()=='-' || ea.getKey()==osgGA::GUIEventAdapter::KEY_KP_Subtract)
{
changePointSize(-1.0f);
return true;
}
else if (ea.getKey()=='<')
{
changePointAttenuation(1.1f);
return true;
}
else if (ea.getKey()=='>')
{
changePointAttenuation(1.0f/1.1f);
return true;
}
break;
}
default:
break;
}
return false;
}
void PointsEventHandler::accept(osgGA::GUIEventHandlerVisitor& v)
{
v.visit(*this);
}
void PointsEventHandler::getUsage(osg::ApplicationUsage& usage) const
{
usage.addKeyboardMouseBinding("+","Increase point size");
usage.addKeyboardMouseBinding("-","Reduce point size");
usage.addKeyboardMouseBinding(">","Increase point size");
usage.addKeyboardMouseBinding("<","Reduce point size");
}
float PointsEventHandler::getPointSize() const
{
return _point->getSize();
}
void PointsEventHandler::setPointSize(float psize)
{
if (psize>0.0)
{
_point->setSize(psize);
_stateset->setAttribute(_point.get());
}
else
{
_stateset->setAttribute(_point.get(),osg::StateAttribute::INHERIT);
}
osg::notify(osg::INFO)<<"Point size "<<psize<<std::endl;
}
void PointsEventHandler::changePointSize(float delta)
{
setPointSize(getPointSize()+delta);
}
void PointsEventHandler::changePointAttenuation(float scale)
{
if (_point.valid())
{
_point->setDistanceAttenuation(_point->getDistanceAttenuation()*scale);
if (_stateset.valid()) _stateset->setAttribute(_point.get());
}
}
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