6a67be2e32
forcing users to use osgDB::readRef*File() methods. The later is preferable as it closes a potential threading bug when using paging databases in conjunction
with the osgDB::Registry Object Cache. This threading bug occurs when one thread gets an object from the Cache via an osgDB::read*File() call where only
a pointer to the object is passed back, so taking a reference to the object is delayed till it gets reassigned to a ref_ptr<>, but at the same time another
thread calls a flush of the Object Cache deleting this object as it's referenceCount is now zero. Using osgDB::readREf*File() makes sure the a ref_ptr<> is
passed back and the referenceCount never goes to zero.
To ensure the OSG builds when OSG_PROVIDE_READFILE is to OFF the many cases of osgDB::read*File() usage had to be replaced with a ref_ptr<> osgDB::readRef*File()
usage. The avoid this change causing lots of other client code to be rewritten to handle the use of ref_ptr<> in place of C pointer I introduced a serious of
templte methods in various class to adapt ref_ptr<> to the underly C pointer to be passed to old OSG API's, example of this is found in include/osg/Group:
bool addChild(Node* child); // old method which can only be used with a Node*
tempalte<class T> bool addChild(const osg::ref_ptr<T>& child) { return addChild(child.get()); } // adapter template method
These changes together cover 149 modified files, so it's a large submission. This extent of changes are warrent to make use of the Object Cache
and multi-threaded loaded more robust.
git-svn-id: http://svn.openscenegraph.org/osg/OpenSceneGraph/branches/OpenSceneGraph-3.4@15165 16af8721-9629-0410-8352-f15c8da7e697
135 lines
4.0 KiB
C++
135 lines
4.0 KiB
C++
/* -*-c++-*-
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* Copyright (C) 2008 Cedric Pinson <mornifle@plopbyte.net>
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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 <iostream>
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#include <osg/Geometry>
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#include <osg/MatrixTransform>
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#include <osg/Geode>
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#include <osgViewer/Viewer>
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#include <osgViewer/ViewerEventHandlers>
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#include <osgGA/TrackballManipulator>
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#include <osgGA/StateSetManipulator>
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#include <osgUtil/SmoothingVisitor>
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#include <osg/io_utils>
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#include <osgAnimation/MorphGeometry>
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#include <osgAnimation/BasicAnimationManager>
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#include <osgDB/ReadFile>
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#include <osgDB/WriteFile>
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struct GeometryFinder : public osg::NodeVisitor
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{
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osg::ref_ptr<osg::Geometry> _geom;
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GeometryFinder() : osg::NodeVisitor(osg::NodeVisitor::TRAVERSE_ALL_CHILDREN) {}
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void apply(osg::Geode& geode)
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{
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if (_geom.valid())
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return;
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for (unsigned int i = 0; i < geode.getNumDrawables(); i++)
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{
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osg::Geometry* geom = dynamic_cast<osg::Geometry*>(geode.getDrawable(i));
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if (geom) {
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_geom = geom;
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return;
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}
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}
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}
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};
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osg::ref_ptr<osg::Geometry> getShape(const std::string& name)
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{
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osg::ref_ptr<osg::Node> shape0 = osgDB::readRefNodeFile(name);
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if (shape0)
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{
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GeometryFinder finder;
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shape0->accept(finder);
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return finder._geom;
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}
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else
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{
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return NULL;
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}
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}
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int main (int argc, char* argv[])
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{
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osg::ArgumentParser arguments(&argc, argv);
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osgViewer::Viewer viewer(arguments);
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osgAnimation::Animation* animation = new osgAnimation::Animation;
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osgAnimation::FloatLinearChannel* channel0 = new osgAnimation::FloatLinearChannel;
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channel0->getOrCreateSampler()->getOrCreateKeyframeContainer()->push_back(osgAnimation::FloatKeyframe(0,0.0));
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channel0->getOrCreateSampler()->getOrCreateKeyframeContainer()->push_back(osgAnimation::FloatKeyframe(1,1.0));
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channel0->setTargetName("MorphNodeCallback");
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channel0->setName("0");
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animation->addChannel(channel0);
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animation->setName("Morph");
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animation->computeDuration();
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animation->setPlayMode(osgAnimation::Animation::PPONG);
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osgAnimation::BasicAnimationManager* bam = new osgAnimation::BasicAnimationManager;
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bam->registerAnimation(animation);
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osg::ref_ptr<osg::Geometry> geom0 = getShape("morphtarget_shape0.osg");
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if (!geom0) {
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std::cerr << "can't read morphtarget_shape0.osg" << std::endl;
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return 0;
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}
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osg::ref_ptr<osg::Geometry> geom1 = getShape("morphtarget_shape1.osg");
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if (!geom1) {
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std::cerr << "can't read morphtarget_shape1.osg" << std::endl;
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return 0;
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}
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// initialize with the first shape
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osgAnimation::MorphGeometry* morph = new osgAnimation::MorphGeometry(*geom0);
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morph->addMorphTarget(geom1.get());
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viewer.setCameraManipulator(new osgGA::TrackballManipulator());
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osg::Group* scene = new osg::Group;
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scene->addUpdateCallback(bam);
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osg::Geode* geode = new osg::Geode;
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geode->addDrawable(morph);
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geode->addUpdateCallback(new osgAnimation::UpdateMorph("MorphNodeCallback"));
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scene->addChild(geode);
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viewer.addEventHandler(new osgViewer::StatsHandler());
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viewer.addEventHandler(new osgViewer::WindowSizeHandler());
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viewer.addEventHandler(new osgGA::StateSetManipulator(viewer.getCamera()->getOrCreateStateSet()));
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// let's run !
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viewer.setSceneData( scene );
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viewer.realize();
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bam->playAnimation(animation);
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while (!viewer.done())
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{
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viewer.frame();
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}
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osgDB::writeNodeFile(*scene, "morph_scene.osg");
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return 0;
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}
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