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Added support for conrolling point size into slideshow3D.

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This commit is contained in:
Robert Osfield
2003-09-14 22:11:16 +00:00
parent 02bde1b175
commit a54537558c
5 changed files with 152 additions and 16 deletions
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1
examples/slideshow3D/GNUmakefile
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@@ -4,6 +4,7 @@ include $(TOPDIR)/Make/makedefs
CXXFILES =\
SlideShowConstructor.cpp\
SlideEventHandler.cpp\
PointsEventHandler.cpp\
DefaultPresentation.cpp\
ReaderWriterXML.cpp\
slideshow3D.cpp\

79
examples/slideshow3D/PointsEventHandler.cpp Normal file
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@@ -0,0 +1,79 @@
/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2003 Robert Osfield
*
* This library is open source and may be redistributed and/or modified under
* the terms of the GNU Public License (GPL) version 1.0 or
* (at your option) any later version.
*
* This library 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
* OpenSceneGraph Public License for more details.
*/
#include "PointsEventHandler.h"
PointsEventHandler::PointsEventHandler()
{
_point = new osg::Point;
//_point->setDistanceAttenuation(osg::Vec3(0.0,0.0005,0.0f));
_point->setDistanceAttenuation(osg::Vec3(0.0,0.0000,0.000005f));
}
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;
}
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");
}
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);
}
std::cout<<"Point size "<<psize<<std::endl;
}
void PointsEventHandler::changePointSize(float delta)
{
setPointSize(getPointSize()+delta);
}

49
examples/slideshow3D/PointsEventHandler.h Normal file
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@@ -0,0 +1,49 @@
/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2003 Robert Osfield
*
* This library is open source and may be redistributed and/or modified under
* the terms of the GNU Public License (GPL) version 1.0 or
* (at your option) any later version.
*
* This library 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
* OpenSceneGraph Public License for more details.
*/
#ifndef POINTSEVENTHANDLER
#define POINTSEVENTHANDLER 1
#include <osg/StateSet>
#include <osg/Point>
#include <osgGA/GUIEventHandler>
class PointsEventHandler : public osgGA::GUIEventHandler
{
public:
PointsEventHandler();
virtual bool handle(const osgGA::GUIEventAdapter& ea,osgGA::GUIActionAdapter&);
virtual void accept(osgGA::GUIEventHandlerVisitor& v);
void getUsage(osg::ApplicationUsage& usage) const;
void setStateSet(osg::StateSet* stateset) { _stateset=stateset; }
osg::StateSet* getStateSet() { return _stateset.get(); }
const osg::StateSet* getStateSet() const { return _stateset.get(); }
void setPointSize(float psize);
float getPointSize() const;
void changePointSize(float delta);
osg::ref_ptr<osg::StateSet> _stateset;
osg::ref_ptr<osg::Point> _point;
};
#endif

9
examples/slideshow3D/SlideEventHandler.h
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@@ -1,10 +1,9 @@
/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2003 Robert Osfield
*
* This library is open source and may be redistributed and/or modified under
* the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or
* (at your option) any later version. The full license is in LICENSE file
* included with this distribution, and on the openscenegraph.org website.
*
* the terms of the GNU Public License (GPL) version 1.0 or
* (at your option) any later version.
*
* This library 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
@@ -79,6 +78,4 @@ protected:
};
#endif

30
examples/slideshow3D/slideshow3D.cpp
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@@ -1,12 +1,13 @@
/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2003 Robert Osfield
*
* This application is open source and may be redistributed and/or modified
* freely and without restriction, both in commericial and non commericial applications,
* as long as this copyright notice is maintained.
*
* This application is distributed in the hope that it will be useful,
* This library is open source and may be redistributed and/or modified under
* the terms of the GNU Public License (GPL) version 1.0 or
* (at your option) any later version.
*
* This library 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.
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* OpenSceneGraph Public License for more details.
*/
#include <osgDB/ReadFile>
@@ -14,6 +15,7 @@
#include <osgProducer/Viewer>
#include "SlideEventHandler.h"
#include "PointsEventHandler.h"
extern osg::Node* createDefaultPresentation();
@@ -25,7 +27,7 @@ int main( int argc, char **argv )
// set up the usage document, in case we need to print out how to use this program.
arguments.getApplicationUsage()->setApplicationName(arguments.getApplicationName());
arguments.getApplicationUsage()->setDescription(arguments.getApplicationName()+" is the standard OpenSceneGraph example which loads and visualises 3d models.");
arguments.getApplicationUsage()->setDescription(arguments.getApplicationName()+" is the application for presenting 3D interactive slide shows.");
arguments.getApplicationUsage()->setCommandLineUsage(arguments.getApplicationName()+" [options] filename ...");
arguments.getApplicationUsage()->addCommandLineOption("-h or --help","Display this information");
arguments.getApplicationUsage()->addCommandLineOption("-a","Turn auto stepping on by default");
@@ -38,9 +40,6 @@ int main( int argc, char **argv )
// set up the value with sensible default event handlers.
viewer.setUpViewer(osgProducer::Viewer::STANDARD_SETTINGS);
// get details on keyboard and mouse bindings used by the viewer.
viewer.getUsage(*arguments.getApplicationUsage());
// read any time delay argument.
float timeDelayBetweenSlides = 1.5f;
while (arguments.read("-d",timeDelayBetweenSlides)) {}
@@ -55,6 +54,13 @@ int main( int argc, char **argv )
seh->setAutoSteppingActive(autoSteppingActive);
seh->setTimeDelayBetweenSlides(timeDelayBetweenSlides);
// register the handler for modifying the point size
PointsEventHandler* peh = new PointsEventHandler;
viewer.getEventHandlerList().push_front(peh);
// get details on keyboard and mouse bindings used by the viewer.
viewer.getUsage(*arguments.getApplicationUsage());
// if user request help write it out to cout.
if (arguments.read("-h") || arguments.read("--help"))
{
@@ -106,6 +112,10 @@ int main( int argc, char **argv )
// set the scene to render
viewer.setSceneData(loadedModel.get());
// pass the global stateset to the point event handler so that it can
// alter the point size of all points in the scene.
peh->setStateSet(viewer.getGlobalStateSet());
// create the windows and run the threads.
viewer.realize();