d8d0f65e81
1) added texture->setResizeNonPowerOfTwoHint(false); when loading an image. It speeds up by 10 the loading of large images. 2) added a --disk option : only a filelist is read, images are only loaded when needed. It allows to handle very large set of very large images that would not fit in memory. Nothing change when the option is not set."
605 lines
21 KiB
C++
605 lines
21 KiB
C++
/* OpenSceneGraph example, osgstereoimage.
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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 <osgDB/ReadFile>
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#include <osgDB/WriteFile>
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#include <osgUtil/Optimizer>
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#include <osg/Geode>
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#include <osg/Notify>
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#include <osg/MatrixTransform>
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#include <osg/Switch>
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#include <osg/TexMat>
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#include <osg/Texture2D>
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#include <iostream>
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typedef std::vector<std::string> FileList;
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osg::Geode* createSectorForImage(osg::Image* image, osg::TexMat* texmat, float s,float t, float radius, float height, float length)
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{
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int numSegments = 20;
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float Theta = length/radius;
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float dTheta = Theta/(float)(numSegments-1);
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float ThetaZero = height*s/(t*radius);
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// set up the texture.
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osg::Texture2D* texture = new osg::Texture2D;
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texture->setFilter(osg::Texture2D::MIN_FILTER,osg::Texture2D::LINEAR);
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texture->setFilter(osg::Texture2D::MAG_FILTER,osg::Texture2D::LINEAR);
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texture->setResizeNonPowerOfTwoHint(false);
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texture->setImage(image);
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// set up the drawstate.
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osg::StateSet* dstate = new osg::StateSet;
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dstate->setMode(GL_CULL_FACE,osg::StateAttribute::OFF);
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dstate->setMode(GL_LIGHTING,osg::StateAttribute::OFF);
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dstate->setTextureAttributeAndModes(0, texture,osg::StateAttribute::ON);
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dstate->setTextureAttribute(0, texmat);
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// set up the geoset.
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osg::Geometry* geom = new osg::Geometry;
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geom->setStateSet(dstate);
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osg::Vec3Array* coords = new osg::Vec3Array();
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osg::Vec2Array* tcoords = new osg::Vec2Array();
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int i;
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float angle = -Theta/2.0f;
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for(i=0;
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i<numSegments;
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++i, angle+=dTheta)
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{
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coords->push_back(osg::Vec3(sinf(angle)*radius,cosf(angle)*radius,height*0.5f)); // top
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coords->push_back(osg::Vec3(sinf(angle)*radius,cosf(angle)*radius,-height*0.5f)); // bottom.
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tcoords->push_back(osg::Vec2(angle/ThetaZero+0.5f,1.0f)); // top
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tcoords->push_back(osg::Vec2(angle/ThetaZero+0.5f,0.0f)); // bottom.
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}
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osg::Vec4Array* colors = new osg::Vec4Array();
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colors->push_back(osg::Vec4(1.0f,1.0f,1.0f,1.0f));
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osg::DrawArrays* elements = new osg::DrawArrays(osg::PrimitiveSet::QUAD_STRIP,0,coords->size());
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geom->setVertexArray(coords);
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geom->setTexCoordArray(0,tcoords);
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geom->setColorArray(colors);
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geom->setColorBinding(osg::Geometry::BIND_OVERALL);
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geom->addPrimitiveSet(elements);
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// set up the geode.
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osg::Geode* geode = new osg::Geode;
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geode->addDrawable(geom);
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return geode;
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}
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osg::Group * loadImages(std::string image1, std::string image2, osg::TexMat* texmatLeft, osg::TexMat* texmatRight, float radius, float height, float length) {
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osg::ref_ptr<osg::Image> imageLeft = osgDB::readImageFile(image1);
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osg::ref_ptr<osg::Image> imageRight = osgDB::readImageFile(image2);
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if (imageLeft.valid() && imageRight.valid())
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{
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float average_s = (imageLeft->s()+imageRight->s())*0.5f;
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float average_t = (imageLeft->t()+imageRight->t())*0.5f;
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osg::Geode* geodeLeft = createSectorForImage(imageLeft.get(),texmatLeft,average_s,average_t, radius, height, length);
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geodeLeft->setNodeMask(0x01);
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osg::Geode* geodeRight = createSectorForImage(imageRight.get(),texmatRight,average_s,average_t, radius, height, length);
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geodeRight->setNodeMask(0x02);
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osg::Group * imageGroup = new osg::Group;
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imageGroup->addChild(geodeLeft);
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imageGroup->addChild(geodeRight);
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return imageGroup;
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}
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else
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{
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std::cout << "Warning: Unable to load both image files, '"<<image1<<"' & '"<<image2<<"', required for stereo imaging."<<std::endl;
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return 0;
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}
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}
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// create a switch containing a set of child each containing a
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// stereo image pair.
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osg::Switch* createScene(FileList fileList, osg::TexMat* texmatLeft, osg::TexMat* texmatRight, float radius, float height, float length)
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{
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osg::Switch* sw = new osg::Switch;
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// load the images.
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for(unsigned int i=0;i+1<fileList.size();i+=2)
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{
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osg::Group * imageGroup = loadImages(fileList[i],fileList[i+1],texmatLeft,texmatRight, radius, height, length);
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if (imageGroup) sw->addChild(imageGroup);
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}
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if (sw->getNumChildren()>0)
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{
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// select first child.
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sw->setSingleChildOn(0);
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}
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return sw;
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}
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class SlideEventHandler : public osgGA::GUIEventHandler
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{
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public:
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SlideEventHandler();
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META_Object(osgStereImageApp,SlideEventHandler);
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void set(osg::Switch* sw, float offsetX, float offsetY, osg::TexMat* texmatLeft, osg::TexMat* texmatRight, float timePerSlide, bool autoSteppingActive);
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void set(FileList fileList, osg::Switch* sw, float offsetX, float offsetY, osg::TexMat* texmatLeft, osg::TexMat* texmatRight, float radius, float height, float length, float timePerSlide, bool autoSteppingActive);
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virtual bool handle(const osgGA::GUIEventAdapter& ea,osgGA::GUIActionAdapter&);
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virtual void getUsage(osg::ApplicationUsage& usage) const;
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virtual void operator()(osg::Node* node, osg::NodeVisitor* nv);
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void nextSlide();
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void previousSlide();
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void scaleImage(float s);
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void offsetImage(float ds,float dt);
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void rotateImage(float rx,float ry);
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void initTexMatrices();
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protected:
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~SlideEventHandler() {}
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SlideEventHandler(const SlideEventHandler&,const osg::CopyOp&) {}
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osg::ref_ptr<osg::Switch> _switch;
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osg::ref_ptr<osg::TexMat> _texmatLeft;
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osg::ref_ptr<osg::TexMat> _texmatRight;
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float _radius;
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float _height;
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float _length;
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bool _firstTraversal;
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unsigned int _activeSlide;
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double _previousTime;
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double _timePerSlide;
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bool _autoSteppingActive;
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float _initSeperationX;
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float _currentSeperationX;
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float _initSeperationY;
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float _currentSeperationY;
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FileList _fileList;
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};
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SlideEventHandler::SlideEventHandler():
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_switch(0),
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_texmatLeft(0),
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_texmatRight(0),
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_firstTraversal(true),
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_activeSlide(0),
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_previousTime(-1.0f),
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_timePerSlide(5.0),
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_autoSteppingActive(false)
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{
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}
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void SlideEventHandler::set(osg::Switch* sw, float offsetX, float offsetY, osg::TexMat* texmatLeft, osg::TexMat* texmatRight, float timePerSlide, bool autoSteppingActive)
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{
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_switch = sw;
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_switch->setUpdateCallback(this);
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_texmatLeft = texmatLeft;
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_texmatRight = texmatRight;
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_timePerSlide = timePerSlide;
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_autoSteppingActive = autoSteppingActive;
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_initSeperationX = offsetX;
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_currentSeperationX = _initSeperationX;
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_initSeperationY = offsetY;
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_currentSeperationY = _initSeperationY;
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initTexMatrices();
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}
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void SlideEventHandler::set(FileList fileList, osg::Switch* sw, float offsetX, float offsetY, osg::TexMat* texmatLeft, osg::TexMat* texmatRight, float radius, float height, float length, float timePerSlide, bool autoSteppingActive)
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{
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_switch = sw;
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_switch->setUpdateCallback(this);
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_fileList=FileList(fileList);
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osg::ref_ptr<osg::Group> imageGroup = loadImages(fileList[0],fileList[1],texmatLeft,texmatRight, radius, height, length);
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if (imageGroup.get())_switch->addChild(imageGroup.get());
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_texmatLeft = texmatLeft;
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_texmatRight = texmatRight;
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_radius=radius;
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_height=height;
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_length=length;
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_timePerSlide = timePerSlide;
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_autoSteppingActive = autoSteppingActive;
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_initSeperationX = offsetX;
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_currentSeperationX = _initSeperationX;
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_initSeperationY = offsetY;
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_currentSeperationY = _initSeperationY;
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initTexMatrices();
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}
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bool SlideEventHandler::handle(const osgGA::GUIEventAdapter& ea,osgGA::GUIActionAdapter&)
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{
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switch(ea.getEventType())
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{
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case(osgGA::GUIEventAdapter::KEYDOWN):
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{
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if (ea.getKey()=='a')
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{
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_autoSteppingActive = !_autoSteppingActive;
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_previousTime = ea.getTime();
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return true;
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}
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else if (ea.getKey()=='n')
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{
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nextSlide();
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return true;
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}
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else if (ea.getKey()=='p')
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{
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previousSlide();
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return true;
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}
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else if (ea.getKey()=='w')
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{
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scaleImage(0.99f);
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return true;
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}
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else if (ea.getKey()=='s')
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{
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scaleImage(1.01f);
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return true;
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}
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else if (ea.getKey()=='j')
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{
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offsetImage(-0.001f,0.0f);
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return true;
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}
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else if (ea.getKey()=='k')
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{
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offsetImage(0.001f,0.0f);
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return true;
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}
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else if (ea.getKey()=='i')
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{
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offsetImage(0.0f,-0.001f);
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return true;
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}
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else if (ea.getKey()=='m')
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{
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offsetImage(0.0f,0.001f);
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return true;
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}
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else if (ea.getKey()==' ')
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{
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initTexMatrices();
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return true;
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}
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return false;
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}
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case(osgGA::GUIEventAdapter::DRAG):
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case(osgGA::GUIEventAdapter::MOVE):
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{
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static float px = ea.getXnormalized();
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static float py = ea.getYnormalized();
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float dx = ea.getXnormalized()-px;
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float dy = ea.getYnormalized()-py;
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px = ea.getXnormalized();
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py = ea.getYnormalized();
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rotateImage(dx,dy);
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return true;
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}
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default:
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return false;
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}
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}
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void SlideEventHandler::getUsage(osg::ApplicationUsage& usage) const
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{
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usage.addKeyboardMouseBinding("Space","Reset the image position to center");
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usage.addKeyboardMouseBinding("a","Toggle on/off the automatic advancement for image to image");
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usage.addKeyboardMouseBinding("n","Advance to next image");
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usage.addKeyboardMouseBinding("p","Move to previous image");
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usage.addKeyboardMouseBinding("q","Zoom into the image");
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usage.addKeyboardMouseBinding("a","Zoom out of the image");
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usage.addKeyboardMouseBinding("j","Reduce horizontal offset");
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usage.addKeyboardMouseBinding("k","Increase horizontal offset");
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usage.addKeyboardMouseBinding("m","Reduce vertical offset");
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usage.addKeyboardMouseBinding("i","Increase vertical offset");
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}
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void SlideEventHandler::operator()(osg::Node* node, osg::NodeVisitor* nv)
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{
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if (_autoSteppingActive && nv->getFrameStamp())
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{
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double time = nv->getFrameStamp()->getSimulationTime();
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if (_firstTraversal)
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{
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_firstTraversal = false;
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_previousTime = time;
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}
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else if (time-_previousTime>_timePerSlide)
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{
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_previousTime = time;
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nextSlide();
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}
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}
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traverse(node,nv);
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}
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void SlideEventHandler::nextSlide()
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{
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if (_switch->getNumChildren()==0) return;
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++_activeSlide;
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if (_fileList.size()>0) {
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if (_activeSlide>= _fileList.size()/2 ) _activeSlide = 0;
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osg::ref_ptr<osg::Group> images = loadImages(_fileList[2*_activeSlide],_fileList[2*_activeSlide+1],_texmatLeft.get(),_texmatRight.get(),_radius,_height,_length);
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if (images.valid()) _switch->replaceChild(_switch->getChild(0),images.get());
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} else {
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if (_activeSlide>=_switch->getNumChildren()) _activeSlide = 0;
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_switch->setSingleChildOn(_activeSlide);
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}
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}
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void SlideEventHandler::previousSlide()
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{
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if (_switch->getNumChildren()==0) return;
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if (_fileList.size()>0) {
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if (_activeSlide==0) _activeSlide = _fileList.size()/2-1;
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else --_activeSlide;
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osg::ref_ptr<osg::Group> images = loadImages(_fileList[2*_activeSlide],_fileList[2*_activeSlide+1],_texmatLeft.get(),_texmatRight.get(),_radius,_height,_length);
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if (images.valid()) _switch->replaceChild(_switch->getChild(0),images.get());
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} else {
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if (_activeSlide==0) _activeSlide = _switch->getNumChildren()-1;
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else --_activeSlide;
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_switch->setSingleChildOn(_activeSlide);
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}
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}
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void SlideEventHandler::scaleImage(float s)
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{
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_texmatLeft->setMatrix(_texmatLeft->getMatrix()*osg::Matrix::translate(-0.5f,-0.5f,0.0f)*osg::Matrix::scale(s,s,1.0f)*osg::Matrix::translate(0.5f,0.5f,0.0f));
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_texmatRight->setMatrix(_texmatRight->getMatrix()*osg::Matrix::translate(-0.5f,-0.5f,0.0f)*osg::Matrix::scale(s,s,1.0f)*osg::Matrix::translate(0.5f,0.5f,0.0f));
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}
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void SlideEventHandler::offsetImage(float ds,float dt)
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{
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_currentSeperationX+=ds;
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_currentSeperationY+=dt;
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osg::notify(osg::NOTICE)<<"image offset x = "<<_currentSeperationX<<" y ="<<_currentSeperationY<<std::endl;
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_texmatLeft->setMatrix(_texmatLeft->getMatrix()*osg::Matrix::translate(ds,dt,0.0f));
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_texmatRight->setMatrix(_texmatRight->getMatrix()*osg::Matrix::translate(-ds,-dt,0.0f));
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}
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void SlideEventHandler::rotateImage(float rx,float ry)
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{
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const float scale = 0.5f;
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_texmatLeft->setMatrix(_texmatLeft->getMatrix()*osg::Matrix::translate(-rx*scale,-ry*scale,0.0f));
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_texmatRight->setMatrix(_texmatRight->getMatrix()*osg::Matrix::translate(-rx*scale,-ry*scale,0.0f));
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}
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void SlideEventHandler::initTexMatrices()
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{
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_texmatLeft->setMatrix(osg::Matrix::translate(_initSeperationX,_initSeperationY,0.0f));
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_texmatRight->setMatrix(osg::Matrix::translate(-_initSeperationX,-_initSeperationY,0.0f));
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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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// set up the usage document, in case we need to print out how to use this program.
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arguments.getApplicationUsage()->setDescription(arguments.getApplicationName()+" is the example which demonstrates use node masks to create stereo images.");
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arguments.getApplicationUsage()->setCommandLineUsage(arguments.getApplicationName()+" [options] image_file_left_eye image_file_right_eye");
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arguments.getApplicationUsage()->addCommandLineOption("-d <float>","Time delay in sceonds between the display of successive image pairs when in auto advance mode.");
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arguments.getApplicationUsage()->addCommandLineOption("-a","Enter auto advance of image pairs on start up.");
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arguments.getApplicationUsage()->addCommandLineOption("-x <float>","Horizontal offset of left and right images.");
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arguments.getApplicationUsage()->addCommandLineOption("-y <float>","Vertical offset of left and right images.");
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arguments.getApplicationUsage()->addCommandLineOption("--disk","Keep images on disk");
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arguments.getApplicationUsage()->addCommandLineOption("-h or --help","Display this information");
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arguments.getApplicationUsage()->addCommandLineOption("--SingleThreaded","Select SingleThreaded threading model for viewer.");
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arguments.getApplicationUsage()->addCommandLineOption("--CullDrawThreadPerContext","Select CullDrawThreadPerContext threading model for viewer.");
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arguments.getApplicationUsage()->addCommandLineOption("--DrawThreadPerContext","Select DrawThreadPerContext threading model for viewer.");
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arguments.getApplicationUsage()->addCommandLineOption("--CullThreadPerCameraDrawThreadPerContext","Select CullThreadPerCameraDrawThreadPerContext threading model for viewer.");
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// construct the viewer.
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osgViewer::Viewer viewer;
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// register the handler to add keyboard and mosue handling.
|
|
SlideEventHandler* seh = new SlideEventHandler();
|
|
viewer.addEventHandler(seh);
|
|
|
|
// read any time delay argument.
|
|
float timeDelayBetweenSlides = 5.0f;
|
|
while (arguments.read("-d",timeDelayBetweenSlides)) {}
|
|
|
|
bool autoSteppingActive = false;
|
|
while (arguments.read("-a")) autoSteppingActive = true;
|
|
|
|
float offsetX=0.0f;
|
|
while (arguments.read("-x",offsetX)) {}
|
|
|
|
float offsetY=0.0f;
|
|
while (arguments.read("-y",offsetY)) {}
|
|
|
|
bool onDisk=false;
|
|
while (arguments.read("--disk")) { onDisk=true;}
|
|
|
|
// if user request help write it out to cout.
|
|
if (arguments.read("-h") || arguments.read("--help"))
|
|
{
|
|
arguments.getApplicationUsage()->write(std::cout);
|
|
return 1;
|
|
}
|
|
|
|
osgViewer::Viewer::ThreadingModel threading = osgViewer::Viewer::SingleThreaded;
|
|
while (arguments.read("--SingleThreaded")) threading = osgViewer::Viewer::SingleThreaded;
|
|
while (arguments.read("--CullDrawThreadPerContext")) threading = osgViewer::Viewer::CullDrawThreadPerContext;
|
|
while (arguments.read("--DrawThreadPerContext")) threading = osgViewer::Viewer::DrawThreadPerContext;
|
|
while (arguments.read("--CullThreadPerCameraDrawThreadPerContext")) threading = osgViewer::Viewer::CullThreadPerCameraDrawThreadPerContext;
|
|
|
|
viewer.setThreadingModel(threading);
|
|
|
|
// any option left unread are converted into errors to write out later.
|
|
arguments.reportRemainingOptionsAsUnrecognized();
|
|
|
|
// report any errors if they have occured when parsing the program aguments.
|
|
if (arguments.errors())
|
|
{
|
|
arguments.writeErrorMessages(std::cout);
|
|
return 1;
|
|
}
|
|
|
|
// extract the filenames from the arguments list.
|
|
FileList fileList;
|
|
for(int pos=1;pos<arguments.argc();++pos)
|
|
{
|
|
if (arguments.isString(pos)) fileList.push_back(arguments[pos]);
|
|
}
|
|
|
|
if (fileList.empty())
|
|
{
|
|
fileList.push_back("Images/dog_left_eye.jpg");
|
|
fileList.push_back("Images/dog_right_eye.jpg");
|
|
}
|
|
else if (fileList.size()<2)
|
|
{
|
|
arguments.getApplicationUsage()->write(std::cout,osg::ApplicationUsage::COMMAND_LINE_OPTION);
|
|
return 1;
|
|
}
|
|
|
|
// now the windows have been realized we switch off the cursor to prevent it
|
|
// distracting the people seeing the stereo images.
|
|
double fovy, aspectRatio, zNear, zFar;
|
|
viewer.getCamera()->getProjectionMatrixAsPerspective(fovy, aspectRatio, zNear, zFar);
|
|
|
|
float radius = 1.0f;
|
|
float height = 2*radius*tan(osg::DegreesToRadians(fovy)*0.5f);
|
|
float length = osg::PI*radius; // half a cylinder.
|
|
|
|
// use a texure matrix to control the placement of the image.
|
|
osg::TexMat* texmatLeft = new osg::TexMat;
|
|
osg::TexMat* texmatRight = new osg::TexMat;
|
|
|
|
// creat the scene from the file list.
|
|
osg::ref_ptr<osg::Switch> rootNode;
|
|
if (!onDisk) rootNode = createScene(fileList,texmatLeft,texmatRight,radius,height,length);
|
|
else rootNode=new osg::Switch();
|
|
|
|
//osgDB::writeNodeFile(*rootNode,"test.osg");
|
|
|
|
|
|
viewer.getCamera()->setCullMask(0xffffffff);
|
|
viewer.getCamera()->setCullMaskLeft(0x00000001);
|
|
viewer.getCamera()->setCullMaskRight(0x00000002);
|
|
|
|
// set up the use of stereo by default.
|
|
osg::DisplaySettings::instance()->setStereo(true);
|
|
|
|
// set the scene to render
|
|
viewer.setSceneData(rootNode.get());
|
|
|
|
|
|
// create the windows and run the threads.
|
|
viewer.realize();
|
|
|
|
|
|
// switch off the cursor
|
|
osgViewer::Viewer::Windows windows;
|
|
viewer.getWindows(windows);
|
|
for(osgViewer::Viewer::Windows::iterator itr = windows.begin();
|
|
itr != windows.end();
|
|
++itr)
|
|
{
|
|
(*itr)->useCursor(false);
|
|
}
|
|
|
|
viewer.setFusionDistance(osgUtil::SceneView::USE_FUSION_DISTANCE_VALUE,radius);
|
|
|
|
// set up the SlideEventHandler.
|
|
if (onDisk) seh->set(fileList,rootNode.get(),offsetX,offsetY,texmatLeft,texmatRight,radius,height,length,timeDelayBetweenSlides,autoSteppingActive);
|
|
else seh->set(rootNode.get(),offsetX,offsetY,texmatLeft,texmatRight,timeDelayBetweenSlides,autoSteppingActive);
|
|
|
|
osg::Matrix homePosition;
|
|
homePosition.makeLookAt(osg::Vec3(0.0f,0.0f,0.0f),osg::Vec3(0.0f,1.0f,0.0f),osg::Vec3(0.0f,0.0f,1.0f));
|
|
|
|
while( !viewer.done() )
|
|
{
|
|
viewer.getCamera()->setViewMatrix(homePosition);
|
|
|
|
// fire off the cull and draw traversals of the scene.
|
|
viewer.frame();
|
|
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|