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
110 lines
3.6 KiB
C++
110 lines
3.6 KiB
C++
/* OpenSceneGraph example, osgmultitexture.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include <osgViewer/Viewer>
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#include <osg/Notify>
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#include <osg/Texture2D>
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#include <osg/TexEnv>
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#include <osg/TexGen>
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#include <osgDB/Registry>
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#include <osgDB/ReadFile>
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#include <osgGA/TrackballManipulator>
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#include <osgGA/FlightManipulator>
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#include <osgGA/DriveManipulator>
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#include <osgUtil/Optimizer>
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#include <iostream>
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int main( int argc, char **argv )
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{
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// use an ArgumentParser object to manage the program arguments.
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osg::ArgumentParser arguments(&argc,argv);
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// construct the viewer.
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osgViewer::Viewer viewer;
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// load the nodes from the commandline arguments.
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osg::ref_ptr<osg::Node> rootnode = osgDB::readRefNodeFiles(arguments);
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// if not loaded assume no arguments passed in, try use default mode instead.
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if (!rootnode) rootnode = osgDB::readRefNodeFile("cessnafire.osgt");
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if (!rootnode)
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{
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osg::notify(osg::NOTICE)<<"Please specify a model filename on the command line."<<std::endl;
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return 1;
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}
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osg::ref_ptr<osg::Image> image = osgDB::readRefImageFile("Images/reflect.rgb");
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if (image)
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{
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osg::Texture2D* texture = new osg::Texture2D;
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texture->setImage(image);
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osg::TexGen* texgen = new osg::TexGen;
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texgen->setMode(osg::TexGen::SPHERE_MAP);
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osg::TexEnv* texenv = new osg::TexEnv;
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texenv->setMode(osg::TexEnv::BLEND);
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texenv->setColor(osg::Vec4(0.3f,0.3f,0.3f,0.3f));
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osg::StateSet* stateset = new osg::StateSet;
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stateset->setTextureAttributeAndModes(1,texture,osg::StateAttribute::ON);
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stateset->setTextureAttributeAndModes(1,texgen,osg::StateAttribute::ON);
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stateset->setTextureAttribute(1,texenv);
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rootnode->setStateSet(stateset);
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}
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else
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{
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osg::notify(osg::NOTICE)<<"unable to load reflect map, model will not be mutlitextured"<<std::endl;
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}
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// run optimization over the scene graph
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osgUtil::Optimizer optimzer;
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optimzer.optimize(rootnode);
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// add a viewport to the viewer and attach the scene graph.
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viewer.setSceneData( rootnode );
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// create the windows and run the threads.
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viewer.realize();
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for(unsigned int contextID = 0;
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contextID<osg::DisplaySettings::instance()->getMaxNumberOfGraphicsContexts();
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++contextID)
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{
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osg::GLExtensions* textExt = osg::GLExtensions::Get(contextID,false);
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if (textExt)
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{
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if (!textExt->isMultiTexturingSupported)
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{
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std::cout<<"Warning: multi-texturing not supported by OpenGL drivers, unable to run application."<<std::endl;
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return 1;
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}
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}
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}
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return viewer.run();
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}
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