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/* -*-c++-*-
* Copyright (C) 2008 Cedric Pinson <mornifle@plopbyte.net>
*
* 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.
*
* 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 <iostream>
#include <osg/Geometry>
#include <osg/MatrixTransform>
#include <osg/Geode>
#include <osgViewer/Viewer>
#include <osgViewer/ViewerEventHandlers>
#include <osgGA/TrackballManipulator>
#include <osgGA/StateSetManipulator>
#include <osgUtil/SmoothingVisitor>
#include <osg/io_utils>
#include <osgAnimation/MorphGeometry>
#include <osgAnimation/BasicAnimationManager>
#include <osgDB/ReadFile>
#include <osgDB/WriteFile>
struct GeometryFinder : public osg::NodeVisitor
{
osg::ref_ptr<osg::Geometry> _geom;
GeometryFinder() : osg::NodeVisitor(osg::NodeVisitor::TRAVERSE_ALL_CHILDREN) {}
void apply(osg::Geode& geode)
{
if (_geom.valid())
return;
for (unsigned int i = 0; i < geode.getNumDrawables(); i++)
{
osg::Geometry* geom = dynamic_cast<osg::Geometry*>(geode.getDrawable(i));
if (geom) {
_geom = geom;
return;
}
}
}
};
osg::ref_ptr<osg::Geometry> getShape(const std::string& name)
{
osg::ref_ptr<osg::Node> shape0 = osgDB::readNodeFile(name);
if (shape0)
{
GeometryFinder finder;
shape0->accept(finder);
return finder._geom;
}
else
{
return NULL;
}
}
int main (int argc, char* argv[])
{
osg::ArgumentParser arguments(&argc, argv);
osgViewer::Viewer viewer(arguments);
osgAnimation::Animation* animation = new osgAnimation::Animation;
osgAnimation::FloatLinearChannel* channel0 = new osgAnimation::FloatLinearChannel;
channel0->getOrCreateSampler()->getOrCreateKeyframeContainer()->push_back(osgAnimation::FloatKeyframe(0,0.0));
channel0->getOrCreateSampler()->getOrCreateKeyframeContainer()->push_back(osgAnimation::FloatKeyframe(1,1.0));
channel0->setTargetName("MorphNodeCallback");
channel0->setName("0");
animation->addChannel(channel0);
animation->setName("Morph");
animation->computeDuration();
animation->setPlayMode(osgAnimation::Animation::PPONG);
osgAnimation::BasicAnimationManager* bam = new osgAnimation::BasicAnimationManager;
bam->registerAnimation(animation);
osg::ref_ptr<osg::Geometry> geom0 = getShape("morphtarget_shape0.osg");
if (!geom0) {
std::cerr << "can't read morphtarget_shape0.osg" << std::endl;
return 0;
}
osg::ref_ptr<osg::Geometry> geom1 = getShape("morphtarget_shape1.osg");
if (!geom1) {
std::cerr << "can't read morphtarget_shape1.osg" << std::endl;
return 0;
}
// initialize with the first shape
osgAnimation::MorphGeometry* morph = new osgAnimation::MorphGeometry(*geom0);
morph->addMorphTarget(geom1.get());
viewer.setCameraManipulator(new osgGA::TrackballManipulator());
osg::Group* scene = new osg::Group;
scene->addUpdateCallback(bam);
osg::Geode* geode = new osg::Geode;
geode->addDrawable(morph);
geode->addUpdateCallback(new osgAnimation::UpdateMorph("MorphNodeCallback"));
scene->addChild(geode);
viewer.addEventHandler(new osgViewer::StatsHandler());
viewer.addEventHandler(new osgViewer::WindowSizeHandler());
viewer.addEventHandler(new osgGA::StateSetManipulator(viewer.getCamera()->getOrCreateStateSet()));
// let's run !
viewer.setSceneData( scene );
viewer.realize();
bam->playAnimation(animation);
while (!viewer.done())
{
viewer.frame();
}
osgDB::writeNodeFile(*scene, "morph_scene.osg");
return 0;
}
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