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
356 lines
12 KiB
C++
356 lines
12 KiB
C++
/* OpenSceneGraph example, osgcamera.
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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 <osgDB/ReadFile>
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#include <osgDB/WriteFile>
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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/FlightManipulator>
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#include <osgGA/AnimationPathManipulator>
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#include <iostream>
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class ModelHandler : public osgGA::GUIEventHandler
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{
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public:
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ModelHandler():
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_position(0) {}
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typedef std::vector<std::string> Filenames;
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Filenames _filenames;
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unsigned int _position;
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void add(const std::string& filename) { _filenames.push_back(filename); }
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bool handle(const osgGA::GUIEventAdapter& ea, osgGA::GUIActionAdapter& aa)
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{
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osgViewer::Viewer* viewer = dynamic_cast<osgViewer::Viewer*>(&aa);
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if (!viewer) return false;
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if (_filenames.empty()) return false;
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switch(ea.getEventType())
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{
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case(osgGA::GUIEventAdapter::KEYUP):
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{
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if (ea.getKey()=='l')
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{
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osg::ref_ptr<osg::Node> model = osgDB::readRefNodeFile( _filenames[_position] );
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++_position;
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if (_position>=_filenames.size()) _position = 0;
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if (model.valid())
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{
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viewer->setSceneData(model.get());
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}
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return true;
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}
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}
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default: break;
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}
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return false;
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}
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bool _done;
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};
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void singleWindowMultipleCameras(osgViewer::Viewer& viewer)
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{
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osg::GraphicsContext::WindowingSystemInterface* wsi = osg::GraphicsContext::getWindowingSystemInterface();
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if (!wsi)
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{
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osg::notify(osg::NOTICE)<<"Error, no WindowSystemInterface available, cannot create windows."<<std::endl;
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return;
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}
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unsigned int width, height;
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wsi->getScreenResolution(osg::GraphicsContext::ScreenIdentifier(0), width, height);
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osg::ref_ptr<osg::GraphicsContext::Traits> traits = new osg::GraphicsContext::Traits;
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traits->x = 0;
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traits->y = 0;
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traits->width = width;
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traits->height = height;
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traits->windowDecoration = true;
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traits->doubleBuffer = true;
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traits->sharedContext = 0;
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osg::ref_ptr<osg::GraphicsContext> gc = osg::GraphicsContext::createGraphicsContext(traits.get());
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if (gc.valid())
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{
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osg::notify(osg::INFO)<<" GraphicsWindow has been created successfully."<<std::endl;
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// need to ensure that the window is cleared make sure that the complete window is set the correct colour
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// rather than just the parts of the window that are under the camera's viewports
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gc->setClearColor(osg::Vec4f(0.2f,0.2f,0.6f,1.0f));
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gc->setClearMask(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
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}
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else
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{
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osg::notify(osg::NOTICE)<<" GraphicsWindow has not been created successfully."<<std::endl;
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}
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unsigned int numCameras = 2;
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double aspectRatioScale = 1.0;///(double)numCameras;
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for(unsigned int i=0; i<numCameras;++i)
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{
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osg::ref_ptr<osg::Camera> camera = new osg::Camera;
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camera->setGraphicsContext(gc.get());
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camera->setViewport(new osg::Viewport((i*width)/numCameras,(i*height)/numCameras, width/numCameras, height/numCameras));
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GLenum buffer = traits->doubleBuffer ? GL_BACK : GL_FRONT;
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camera->setDrawBuffer(buffer);
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camera->setReadBuffer(buffer);
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viewer.addSlave(camera.get(), osg::Matrixd(), osg::Matrixd::scale(aspectRatioScale,1.0,1.0));
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}
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}
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void multipleWindowMultipleCameras(osgViewer::Viewer& viewer, bool multipleScreens)
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{
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osg::GraphicsContext::WindowingSystemInterface* wsi = osg::GraphicsContext::getWindowingSystemInterface();
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if (!wsi)
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{
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osg::notify(osg::NOTICE)<<"Error, no WindowSystemInterface available, cannot create windows."<<std::endl;
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return;
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}
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unsigned int width, height;
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wsi->getScreenResolution(osg::GraphicsContext::ScreenIdentifier(0), width, height);
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unsigned int numCameras = 6;
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double aspectRatioScale = (double)numCameras;
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double translate_x = double(numCameras)-1;
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for(unsigned int i=0; i<numCameras;++i, translate_x -= 2.0)
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{
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osg::ref_ptr<osg::GraphicsContext::Traits> traits = new osg::GraphicsContext::Traits;
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traits->screenNum = multipleScreens ? i / 3 : 0;
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traits->x = (i*width)/numCameras;
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traits->y = 0;
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traits->width = width/numCameras-1;
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traits->height = height;
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traits->windowDecoration = true;
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traits->doubleBuffer = true;
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traits->sharedContext = 0;
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osg::ref_ptr<osg::GraphicsContext> gc = osg::GraphicsContext::createGraphicsContext(traits.get());
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if (gc.valid())
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{
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osg::notify(osg::INFO)<<" GraphicsWindow has been created successfully."<<std::endl;
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}
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else
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{
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osg::notify(osg::NOTICE)<<" GraphicsWindow has not been created successfully."<<std::endl;
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}
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osg::ref_ptr<osg::Camera> camera = new osg::Camera;
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camera->setGraphicsContext(gc.get());
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camera->setViewport(new osg::Viewport(0,0, width/numCameras, height));
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GLenum buffer = traits->doubleBuffer ? GL_BACK : GL_FRONT;
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camera->setDrawBuffer(buffer);
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camera->setReadBuffer(buffer);
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viewer.addSlave(camera.get(), osg::Matrix::scale(aspectRatioScale, 1.0, 1.0)*osg::Matrix::translate(translate_x, 0.0, 0.0), osg::Matrix() );
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}
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}
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class EnableVBOVisitor : public osg::NodeVisitor
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{
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public:
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EnableVBOVisitor():
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osg::NodeVisitor(osg::NodeVisitor::TRAVERSE_ALL_CHILDREN) {}
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void apply(osg::Geode& geode)
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{
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for(unsigned int i=0; i<geode.getNumDrawables();++i)
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{
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osg::Geometry* geom = geode.getDrawable(i)->asGeometry();
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if (geom)
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{
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osg::notify(osg::NOTICE)<<"Enabling VBO"<<std::endl;
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geom->setUseVertexBufferObjects(true);
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}
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}
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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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// use an ArgumentParser object to manage the program arguments.
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osg::ArgumentParser arguments(&argc,argv);
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if (argc<2)
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{
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std::cout << argv[0] <<": requires filename argument." << std::endl;
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return 1;
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}
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unsigned int numRepeats = 2;
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if (arguments.read("--repeat",numRepeats) || arguments.read("-r",numRepeats) || arguments.read("--repeat") || arguments.read("-r"))
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{
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bool sharedModel = arguments.read("--shared");
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bool enableVBO = arguments.read("--vbo");
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osg::ref_ptr<osg::Node> model;
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if (sharedModel)
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{
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model = osgDB::readRefNodeFiles(arguments);
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if (!model) return 0;
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if (enableVBO)
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{
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EnableVBOVisitor enableVBOs;
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model->accept(enableVBOs);
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}
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}
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osgViewer::Viewer::ThreadingModel threadingModel = osgViewer::Viewer::AutomaticSelection;
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while (arguments.read("-s")) { threadingModel = osgViewer::Viewer::SingleThreaded; }
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while (arguments.read("-g")) { threadingModel = osgViewer::Viewer::CullDrawThreadPerContext; }
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while (arguments.read("-d")) { threadingModel = osgViewer::Viewer::DrawThreadPerContext; }
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while (arguments.read("-c")) { threadingModel = osgViewer::Viewer::CullThreadPerCameraDrawThreadPerContext; }
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for(unsigned int i=0; i<numRepeats; ++i)
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{
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osg::notify(osg::NOTICE)<<"+++++++++++++ New viewer ++++++++++++"<<std::endl;
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{
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osgViewer::Viewer viewer;
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viewer.setThreadingModel(threadingModel);
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if (sharedModel) viewer.setSceneData(model.get());
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else
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{
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osg::ref_ptr<osg::Node> node = osgDB::readRefNodeFiles(arguments);
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if (!node) return 0;
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if (enableVBO)
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{
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EnableVBOVisitor enableVBOs;
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node->accept(enableVBOs);
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}
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viewer.setSceneData(node.get());
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}
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viewer.run();
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}
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osg::notify(osg::NOTICE)<<"------------ Viewer ended ----------"<<std::endl<<std::endl;
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}
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return 0;
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}
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std::string pathfile;
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osg::ref_ptr<osgGA::AnimationPathManipulator> apm = 0;
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while (arguments.read("-p",pathfile))
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{
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apm = new osgGA::AnimationPathManipulator(pathfile);
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if (!apm.valid() || !(apm->valid()) )
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{
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apm = 0;
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}
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}
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osgViewer::Viewer viewer(arguments);
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while (arguments.read("-s")) { viewer.setThreadingModel(osgViewer::Viewer::SingleThreaded); }
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while (arguments.read("-g")) { viewer.setThreadingModel(osgViewer::Viewer::CullDrawThreadPerContext); }
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while (arguments.read("-d")) { viewer.setThreadingModel(osgViewer::Viewer::DrawThreadPerContext); }
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while (arguments.read("-c")) { viewer.setThreadingModel(osgViewer::Viewer::CullThreadPerCameraDrawThreadPerContext); }
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bool limitNumberOfFrames = false;
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unsigned int maxFrames = 10;
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while (arguments.read("--run-till-frame-number",maxFrames)) { limitNumberOfFrames = true; }
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// alternative viewer window setups.
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while (arguments.read("-1")) { singleWindowMultipleCameras(viewer); }
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while (arguments.read("-2")) { multipleWindowMultipleCameras(viewer, false); }
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while (arguments.read("-3")) { multipleWindowMultipleCameras(viewer, true); }
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if (apm.valid()) viewer.setCameraManipulator(apm.get());
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else viewer.setCameraManipulator( new osgGA::TrackballManipulator() );
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viewer.addEventHandler(new osgViewer::StatsHandler);
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viewer.addEventHandler(new osgViewer::ThreadingHandler);
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std::string configfile;
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while (arguments.read("--config", configfile))
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{
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osg::notify(osg::NOTICE)<<"Trying to read config file "<<configfile<<std::endl;
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osg::ref_ptr<osg::Object> object = osgDB::readRefObjectFile(configfile);
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osgViewer::View* view = dynamic_cast<osgViewer::View*>(object.get());
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if (view)
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{
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osg::notify(osg::NOTICE)<<"Read config file successfully"<<std::endl;
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}
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else
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{
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osg::notify(osg::NOTICE)<<"Failed to read config file : "<<configfile<<std::endl;
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return 1;
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}
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}
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while (arguments.read("--write-config", configfile)) { osgDB::writeObjectFile(viewer, configfile); }
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if (arguments.read("-m"))
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{
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ModelHandler* modelHandler = new ModelHandler;
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for(int i=1; i<arguments.argc();++i)
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{
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modelHandler->add(arguments[i]);
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}
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viewer.addEventHandler(modelHandler);
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}
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else
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{
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// load the scene.
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osg::ref_ptr<osg::Node> loadedModel = osgDB::readRefNodeFiles(arguments);
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if (!loadedModel) loadedModel = osgDB::readRefNodeFile("cow.osgt");
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if (!loadedModel)
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{
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std::cout << argv[0] <<": No data loaded." << std::endl;
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return 1;
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}
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viewer.setSceneData(loadedModel);
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}
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viewer.realize();
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unsigned int numFrames = 0;
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while(!viewer.done() && !(limitNumberOfFrames && numFrames>=maxFrames))
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{
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viewer.frame();
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++numFrames;
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}
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return 0;
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}
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