[osg-users] Question about osgManipulator::GridConstraint

Robert Osfield robert.osfield at gmail.com
Tue Nov 24 05:31:44 PST 2009


Hi Matthias,

Could you provide the modified file as an attachment rather than
inline as the later breaks the indentation/word wrap.

Cheers,
Robert.

On Tue, Nov 24, 2009 at 12:29 PM, Matthias Asselborn
<matthias.asselborn at gmx.de> wrote:
> Thank you very much Robert for this reply!
>
> here is the whole code
> ive modified the method addDraggerToScene
>
>
> Code:
>
> /* OpenSceneGraph example, osgmanipulator.
> *
> *  Permission is hereby granted, free of charge, to any person obtaining a copy
> *  of this software and associated documentation files (the "Software"), to deal
> *  in the Software without restriction, including without limitation the rights
> *  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
> *  copies of the Software, and to permit persons to whom the Software is
> *  furnished to do so, subject to the following conditions:
> *
> *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
> *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
> *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
> *  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
> *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
> *  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
> *  THE SOFTWARE.
> */
>
> #include <osgDB/ReadFile>
> #include <osgUtil/Optimizer>
> #include <osgViewer/Viewer>
> #include <osg/CoordinateSystemNode>
> #include <osgText/Text>
>
> #include <osgManipulator/TabBoxDragger>
> #include <osgManipulator/TabBoxTrackballDragger>
> #include <osgManipulator/TabPlaneDragger>
> #include <osgManipulator/TabPlaneTrackballDragger>
> #include <osgManipulator/TrackballDragger>
> #include <osgManipulator/Translate1DDragger>
> #include <osgManipulator/Translate2DDragger>
> #include <osgManipulator/TranslateAxisDragger>
>
> #include <osg/ShapeDrawable>
> #include <osg/MatrixTransform>
> #include <osg/Geometry>
> #include <osg/Material>
>
> #include <iostream>
>
> osgManipulator::Dragger* createDragger(const std::string& name)
> {
>        osgManipulator::Dragger* dragger = 0;
>        if ("TabPlaneDragger" == name)
>        {
>                osgManipulator::TabPlaneDragger* d = new osgManipulator::TabPlaneDragger();
>                d->setupDefaultGeometry();
>                dragger = d;
>        }
>        else if ("TabPlaneTrackballDragger" == name)
>        {
>                osgManipulator::TabPlaneTrackballDragger* d = new osgManipulator::TabPlaneTrackballDragger();
>                d->setupDefaultGeometry();
>                dragger = d;
>        }
>        else if ("TabBoxTrackballDragger" == name)
>        {
>                osgManipulator::TabBoxTrackballDragger* d = new osgManipulator::TabBoxTrackballDragger();
>                d->setupDefaultGeometry();
>                dragger = d;
>        }
>        else if ("TrackballDragger" == name)
>        {
>                osgManipulator::TrackballDragger* d = new osgManipulator::TrackballDragger();
>                d->setupDefaultGeometry();
>                dragger = d;
>        }
>        else if ("Translate1DDragger" == name)
>        {
>                osgManipulator::Translate1DDragger* d = new osgManipulator::Translate1DDragger();
>                d->setupDefaultGeometry();
>                dragger = d;
>        }
>        else if ("Translate2DDragger" == name)
>        {
>                osgManipulator::Translate2DDragger* d = new osgManipulator::Translate2DDragger();
>                d->setupDefaultGeometry();
>                dragger = d;
>        }
>        else if ("TranslateAxisDragger" == name)
>        {
>                osgManipulator::TranslateAxisDragger* d = new osgManipulator::TranslateAxisDragger();
>                d->setupDefaultGeometry();
>                dragger = d;
>        }
>        else
>        {
>                osgManipulator::TabBoxDragger* d = new osgManipulator::TabBoxDragger();
>                d->setupDefaultGeometry();
>                dragger = d;
>        }
>
>
>
>        return dragger;
> }
>
>
> osg::Node* addDraggerToScene(osg::Node* scene, const std::string& name)
> {
>        scene->getOrCreateStateSet()->setMode(GL_NORMALIZE, osg::StateAttribute::ON);
>
>        osg::MatrixTransform* selection = new osg::MatrixTransform;
>        selection->addChild(scene);
>
>        osgManipulator::Dragger* dragger = createDragger(name);
>
>
>        osg::Group* root = new osg::Group;
>        root->addChild(dragger);
>        root->addChild(selection);
>
>        float scale = scene->getBound().radius() * 1.6;
>        dragger->setMatrix(osg::Matrix::scale(scale, scale, scale) *
>                osg::Matrix::translate(scene->getBound().center()));
>
>        osgManipulator::GridConstraint *con = new osgManipulator::GridConstraint( *selection , osg::Vec3(0,0,0), osg::Vec3(30,30,30 ) ) ;
>        osg::ref_ptr<osgManipulator::TabBoxDragger> m_pManipulator = new osgManipulator::TabBoxDragger;
>        m_pManipulator->addConstraint( con);
>
>        dragger->addConstraint(con);
>        dragger->addTransformUpdating(selection);
>
>        // we want the dragger to handle it's own events automatically
>        dragger->setHandleEvents(true);
>
>        // if we don't set an activation key or mod mask then any mouse click on
>        // the dragger will activate it, however if do define either of ActivationModKeyMask or
>        // and ActivationKeyEvent then you'll have to press either than mod key or the specified key to
>        // be able to activate the dragger when you mouse click on it.  Please note the follow allows
>        // activation if either the ctrl key or the 'a' key is pressed and held down.
>        dragger->setActivationModKeyMask(osgGA::GUIEventAdapter::MODKEY_CTRL);
>        dragger->setActivationKeyEvent('a');
>
>        return root;
> }
>
> osg::Node* createDemoScene() {
>
>        osg::Group* root = new osg::Group;
>
>        osg::ref_ptr<osg::Geode> geode_1 = new osg::Geode;
>        osg::ref_ptr<osg::MatrixTransform> transform_1 = new osg::MatrixTransform;
>
>        osg::ref_ptr<osg::Geode> geode_2 = new osg::Geode;
>        osg::ref_ptr<osg::MatrixTransform> transform_2 = new osg::MatrixTransform;
>
>        osg::ref_ptr<osg::Geode> geode_3 = new osg::Geode;
>        osg::ref_ptr<osg::MatrixTransform> transform_3 = new osg::MatrixTransform;
>
>        osg::ref_ptr<osg::Geode> geode_4 = new osg::Geode;
>        osg::ref_ptr<osg::MatrixTransform> transform_4 = new osg::MatrixTransform;
>
>        osg::ref_ptr<osg::Geode> geode_5 = new osg::Geode;
>        osg::ref_ptr<osg::MatrixTransform> transform_5 = new osg::MatrixTransform;
>
>        osg::ref_ptr<osg::Geode> geode_6 = new osg::Geode;
>        osg::ref_ptr<osg::MatrixTransform> transform_6 = new osg::MatrixTransform;
>
>        osg::ref_ptr<osg::Geode> geode_7 = new osg::Geode;
>        osg::ref_ptr<osg::MatrixTransform> transform_7 = new osg::MatrixTransform;
>
>
>
>
>
>        const float radius = 0.8f;
>        const float height = 1.0f;
>        osg::ref_ptr<osg::TessellationHints> hints = new osg::TessellationHints;
>        hints->setDetailRatio(2.0f);
>        osg::ref_ptr<osg::ShapeDrawable> shape;
>
>        shape = new osg::ShapeDrawable(new osg::Box(osg::Vec3(0.0f, 0.0f, -2.0f), 10, 10.0f, 0.1f), hints.get());
>        shape->setColor(osg::Vec4(0.5f, 0.5f, 0.7f, 1.0f));
>        geode_1->addDrawable(shape.get());
>
>        shape = new osg::ShapeDrawable(new osg::Cylinder(osg::Vec3(0.0f, 0.0f, 0.0f), radius * 2,radius), hints.get());
>        shape->setColor(osg::Vec4(0.8f, 0.8f, 0.8f, 1.0f));
>        geode_2->addDrawable(shape.get());
>
>        shape = new osg::ShapeDrawable(new osg::Cylinder(osg::Vec3(-3.0f, 0.0f, 0.0f), radius,radius), hints.get());
>        shape->setColor(osg::Vec4(0.6f, 0.8f, 0.8f, 1.0f));
>        geode_3->addDrawable(shape.get());
>
>        shape = new osg::ShapeDrawable(new osg::Cone(osg::Vec3(3.0f, 0.0f, 0.0f), 2 * radius,radius), hints.get());
>        shape->setColor(osg::Vec4(0.4f, 0.9f, 0.3f, 1.0f));
>        geode_4->addDrawable(shape.get());
>
>        shape = new osg::ShapeDrawable(new osg::Cone(osg::Vec3(0.0f, -3.0f, 0.0f), radius, height), hints.get());
>        shape->setColor(osg::Vec4(0.2f, 0.5f, 0.7f, 1.0f));
>        geode_5->addDrawable(shape.get());
>
>        shape = new osg::ShapeDrawable(new osg::Cylinder(osg::Vec3(0.0f, 3.0f, 0.0f), radius, height), hints.get());
>        shape->setColor(osg::Vec4(1.0f, 0.3f, 0.3f, 1.0f));
>        geode_6->addDrawable(shape.get());
>
>        shape = new osg::ShapeDrawable(new osg::Cone(osg::Vec3(0.0f, 0.0f, 3.0f), 2.0f, 2.0f), hints.get());
>        shape->setColor(osg::Vec4(0.8f, 0.8f, 0.4f, 1.0f));
>        geode_7->addDrawable(shape.get());
>
>
>
>
>
>
>        // material
>        osg::ref_ptr<osg::Material> matirial = new osg::Material;
>        matirial->setColorMode(osg::Material::DIFFUSE);
>        matirial->setAmbient(osg::Material::FRONT_AND_BACK, osg::Vec4(0, 0, 0, 1));
>        matirial->setSpecular(osg::Material::FRONT_AND_BACK, osg::Vec4(1, 1, 1, 1));
>        matirial->setShininess(osg::Material::FRONT_AND_BACK, 64.0f);
>        root->getOrCreateStateSet()->setAttributeAndModes(matirial.get(), osg::StateAttribute::ON);
>
>        transform_1.get()->addChild(addDraggerToScene(geode_1.get(),"TabBoxDragger"));
>        transform_2.get()->addChild(addDraggerToScene(geode_2.get(),"TabPlaneDragger"));
>        transform_3.get()->addChild(addDraggerToScene(geode_3.get(),"TabBoxTrackballDragger"));
>        transform_4.get()->addChild(addDraggerToScene(geode_4.get(),"TrackballDragger"));
>        transform_5.get()->addChild(addDraggerToScene(geode_5.get(),"Translate1DDragger"));
>        transform_6.get()->addChild(addDraggerToScene(geode_6.get(),"Translate2DDragger"));
>        transform_7.get()->addChild(addDraggerToScene(geode_7.get(),"TranslateAxisDragger"));
>
>        root->addChild(transform_1.get());
>        root->addChild(transform_2.get());
>        root->addChild(transform_3.get());
>        root->addChild(transform_4.get());
>        root->addChild(transform_5.get());
>        root->addChild(transform_6.get());
>        root->addChild(transform_7.get());
>
>
>
>        return root;
> }
> //
> int main( int argc, char **argv )
> {
>
>        // use an ArgumentParser object to manage the program arguments.
>        osg::ArgumentParser arguments(&argc,argv);
>
>        // set up the usage document, in case we need to print out how to use this program.
>        arguments.getApplicationUsage()->setApplicationName(arguments.getApplicationName());
>        arguments.getApplicationUsage()->setCommandLineUsage(arguments.getApplicationName()+" [options] filename ...");
>        arguments.getApplicationUsage()->addCommandLineOption("--image <filename>","Load an image and render it on a quad");
>        arguments.getApplicationUsage()->addCommandLineOption("--dem <filename>","Load an image/DEM and render it on a HeightField");
>        arguments.getApplicationUsage()->addCommandLineOption("-h or --help","Display command line parameters");
>        arguments.getApplicationUsage()->addCommandLineOption("--help-env","Display environmental variables available");
>        arguments.getApplicationUsage()->addCommandLineOption("--help-keys","Display keyboard & mouse bindings available");
>        arguments.getApplicationUsage()->addCommandLineOption("--help-all","Display all command line, env vars and keyboard & mouse bindings.");
>
>        arguments.getApplicationUsage()->addCommandLineOption("--dragger <draggername>","Use the specified dragger for manipulation [TabPlaneDragger,TabPlaneTrackballDragger,TrackballDragger,Translate1DDragger,Translate2DDragger,TranslateAxisDragger,TabBoxDragger]");
>
>
>        // construct the viewer.
>        osgViewer::Viewer viewer;
>
>        // get details on keyboard and mouse bindings used by the viewer.
>        viewer.getUsage(*arguments.getApplicationUsage());
>
>        // if user request help write it out to cout.
>        bool helpAll = arguments.read("--help-all");
>        unsigned int helpType = ((helpAll || arguments.read("-h") || arguments.read("--help"))? osg::ApplicationUsage::COMMAND_LINE_OPTION : 0 ) |
>                ((helpAll ||  arguments.read("--help-env"))? osg::ApplicationUsage::ENVIRONMENTAL_VARIABLE : 0 ) |
>                ((helpAll ||  arguments.read("--help-keys"))? osg::ApplicationUsage::KEYBOARD_MOUSE_BINDING : 0 );
>        if (helpType)
>        {
>                arguments.getApplicationUsage()->write(std::cout, helpType);
>                return 1;
>        }
>
>        // report any errors if they have occurred when parsing the program arguments.
>        if (arguments.errors())
>        {
>                arguments.writeErrorMessages(std::cout);
>                return 1;
>        }
>
>        std::string dragger_name = "TabBoxDragger";
>        arguments.read("--dragger", dragger_name);
>
>        osg::Timer_t start_tick = osg::Timer::instance()->tick();
>
>        // read the scene from the list of file specified command line args.
>        osg::ref_ptr<osg::Node> loadedModel = osgDB::readNodeFiles(arguments);
>
>        // if no model has been successfully loaded report failure.
>        bool tragger2Scene(true);
>        if (!loadedModel)
>        {
>                //std::cout << arguments.getApplicationName() <<": No data loaded" << std::endl;
>                //return 1;
>                loadedModel = createDemoScene();
>                tragger2Scene=false;
>        }
>
>        // any option left unread are converted into errors to write out later.
>        arguments.reportRemainingOptionsAsUnrecognized();
>
>        // report any errors if they have occurred when parsing the program arguments.
>        if (arguments.errors())
>        {
>                arguments.writeErrorMessages(std::cout);
>        }
>
>        osg::Timer_t end_tick = osg::Timer::instance()->tick();
>
>        std::cout << "Time to load = "<<osg::Timer::instance()->delta_s(start_tick,end_tick)<<std::endl;
>
>
>        // optimize the scene graph, remove redundant nodes and state etc.
>        osgUtil::Optimizer optimizer;
>        optimizer.optimize(loadedModel.get());
>
>
>        // pass the loaded scene graph to the viewer.
>        if ( tragger2Scene ) {
>                viewer.setSceneData(addDraggerToScene(loadedModel.get(), dragger_name));
>        } else {
>                viewer.setSceneData(loadedModel.get());
>        }
>
>
>        return viewer.run();
> }
>
>
>
>
>
> ------------------
> Read this topic online here:
> http://forum.openscenegraph.org/viewtopic.php?p=20232#20232
>
>
>
>
>
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> osg-users at lists.openscenegraph.org
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>


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