Hi Akilan, it is the camera manipulator that resets the position of the main camera. Have a look at osghud example how to set up screen aligned views -Nick
On Fri, Mar 26, 2010 at 12:56 PM, Akilan Thangamani < [email protected]> wrote: > Hi Nick > > Find my code below to compile, > > > Code: > > > #include <osg/Node> > #include <osg/Geometry> > #include <osg/Notify> > #include <osg/MatrixTransform> > #include <osg/Texture2D> > #include <osg/DrawPixels> > #include <osg/PolygonOffset> > #include <osg/Geode> > #include <osgDB/Registry> > #include <osgDB/ReadFile> > #include <osgText/Text> > #include <osgViewer/Viewer> > #include <osgViewer/CompositeViewer> > #include <osgViewer/ViewerEventHandlers> > #include <osgGA/StateSetManipulator> > #include <osgGA/TrackballManipulator> > #include <iostream.h> > > #undef MULTI_SCREEN > > #define NUM_CAMERA 1 > #define NUM_SCREEN 1 > > > unsigned char *buf_1, *buf_2, *buf_3, *buf_4; > int buf_width=1920, buf_height=1200; > unsigned int numCameras = NUM_CAMERA; > unsigned int numScreens = NUM_SCREEN; > > > int width=1920 * NUM_SCREEN; > int height=1200; > int read_off=0; > > > osg::ref_ptr<osg::Image> image; > osg::Texture2D *texture[4]; > osg::Geometry *geom[4]; > > > > void initRead(char* fname, int w, int h) > { > buf_1=new unsigned char[buf_width * buf_height]; > buf_2=new unsigned char[buf_width * buf_height]; > buf_3=new unsigned char[buf_width * buf_height]; > buf_4=new unsigned char[buf_width * buf_height]; > > memset((unsigned char*)buf_1,(unsigned char)128,buf_width * > buf_height); > memset((unsigned char*)buf_2,(unsigned char)160,buf_width * > buf_height); > memset((unsigned char*)buf_3,(unsigned char)180,buf_width * > buf_height); > memset((unsigned char*)buf_4,(unsigned char)200,buf_width * > buf_height); > } > > osg::Node* createTex(int index, unsigned char* buf) > { > osg::Group* group=new osg::Group; > > osg::Vec3 top_left(0.0f ,0.0f ,height); > osg::Vec3 bottom_left(0.0f ,0.0f ,0.0f); > osg::Vec3 bottom_right(width ,0.0f, 0.0f); > osg::Vec3 top_right(width, 0.0f, height); > > geom[index] = new osg::Geometry; > > > osg::Vec3Array* vertices = new osg::Vec3Array(4); > (*vertices)[0] = top_left; > (*vertices)[1] = bottom_left; > (*vertices)[2] = bottom_right; > (*vertices)[3] = top_right; > geom[index]->setVertexArray(vertices); > > > osg::Vec2Array* texcoords = new osg::Vec2Array(4); > > (*texcoords)[0].set(0.0f,1.0f); > (*texcoords)[1].set(0.0f,0.0f); > (*texcoords)[2].set(1.0f,0.0f); > (*texcoords)[3].set(1.0f,1.0f); > > geom[index]->setTexCoordArray(0,texcoords); > > osg::Vec3Array* normals = new osg::Vec3Array(1); > (*normals)[0].set(1.0f,0.0f,0.0f); > geom[index]->setNormalArray(normals); > geom[index]->setNormalBinding(osg::Geometry::BIND_OVERALL); > > osg::Vec4Array* colors = new osg::Vec4Array(1); > (*colors)[0].set(1.0f,1.0f,1.0f,1.0f); > geom[index]->setColorArray(colors); > geom[index]->setColorBinding(osg::Geometry::BIND_OVERALL); > > geom[index]->addPrimitiveSet(new osg::DrawArrays(GL_QUADS,0,4)); > > osg::Geode* geom_geode = new osg::Geode; > geom_geode->addDrawable(geom[index]); > > > texture[index] = new osg::Texture2D; > texture[index]->setName("TEXTURE"); > texture[index]->setDataVariance(osg::Object::DYNAMIC); // protect from > being optimized away as static state. > texture[index]->setResizeNonPowerOfTwoHint(false); > > // Setting buffer > image = new osg::Image; > image->setName("BUFFER"); > image->setOrigin(osg::Image::BOTTOM_LEFT); > image->setImage(buf_width, buf_height, 1, GL_LUMINANCE, GL_LUMINANCE, > GL_UNSIGNED_BYTE,buf, osg::Image::NO_DELETE); > > texture[index]->setImage(image); > > > osg::StateSet* stateset = geom[index]->getOrCreateStateSet(); > > > stateset->setTextureAttributeAndModes(0,texture[index],osg::StateAttribute::ON); > stateset->setMode(GL_LIGHTING,osg::StateAttribute::OFF); > > group->addChild(geom_geode); > > return group; > } > > void setView(osgViewer::View* view, int screen_no) > { > > double aspectRatioScale = 1.0; > osg::ref_ptr<osg::GraphicsContext::Traits> traits = new > osg::GraphicsContext::Traits; > traits->screenNum = screen_no; > traits->x = (screen_no*width)/numCameras; > traits->y = 0; > traits->width = width/numCameras-1; > traits->height = height; > traits->windowDecoration = true; > traits->doubleBuffer = true; > traits->sharedContext = 0; > > osg::ref_ptr<osg::GraphicsContext> gc = > osg::GraphicsContext::createGraphicsContext(traits.get()); > > osg::ref_ptr<osg::Camera> camera = new osg::Camera; > camera->setGraphicsContext(gc.get()); > camera->setViewport(new osg::Viewport(0,0, width/numCameras, > height)); > > > camera->setProjectionMatrix(osg::Matrix::ortho2D(0,1920,0,1200)); > camera->setViewMatrix(osg::Matrix::identity()); > camera->setClearMask(GL_DEPTH_BUFFER_BIT); > > GLenum buffer = traits->doubleBuffer ? GL_BACK : GL_FRONT; > camera->setDrawBuffer(buffer); > camera->setReadBuffer(buffer); > view->addSlave(camera.get(), osg::Matrix::scale(aspectRatioScale, > 1.0, 1.0)*osg::Matrix::translate(0.0, 0.0, 0.0), osg::Matrix() ); > } > > int main(int , char **) > { > osgViewer::CompositeViewer viewer; > > osg::Group* root=new osg::Group; > > osgGA::TrackballManipulator* tm=new osgGA::TrackballManipulator; > // Screen-1 > { > osg::Group* scene=new osg::Group; > scene->addChild(createTex(0,buf_1)); > > osgViewer::View* view = new osgViewer::View; > view->setName("View-1"); > view->setSceneData(scene); > setView(view, 0); > > view->setCameraManipulator(tm); > viewer.addView(view); > } > #ifdef MULTI_SCREEN > // Screen-2 > { > osg::Group* scene=new osg::Group; > scene->addChild(createTex(1,buf_2)); > > osgViewer::View* view = new osgViewer::View; > view->setName("View-2"); > view->setSceneData(scene); > setView(view, 1); > > view->setCameraManipulator(tm); > viewer.addView(view); > } > // Screen-3 > { > osg::Group* scene=new osg::Group; > scene->addChild(createTex(2,buf_3)); > > osgViewer::View* view = new osgViewer::View; > view->setName("View-3"); > view->setSceneData(scene); > setView(view, 2); > > view->setCameraManipulator(tm); > viewer.addView(view); > } > > // Screen-4 > { > osg::Group* scene=new osg::Group; > scene->addChild(createTex(3,buf_4)); > > osgViewer::View* view = new osgViewer::View; > view->setName("View-4"); > view->setSceneData(scene); > setView(view, 3); > > view->setCameraManipulator(tm); > viewer.addView(view); > } > #endif > > > viewer.setThreadingModel(osgViewer::CompositeViewer::CullDrawThreadPerContext); > > viewer.realize(); > while(!viewer.done()){ > viewer.frame(); > } > > delete [] buf_1; > delete [] buf_2; > delete [] buf_3; > delete [] buf_4; > > return 0; > } > > > > > ------------------ > Read this topic online here: > http://forum.openscenegraph.org/viewtopic.php?p=26184#26184 > > > > > > _______________________________________________ > osg-users mailing list > [email protected] > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org >
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