source: osgVisual/trunk/src/vista2D/visual_vista2D.cpp @ 218

/* -*-c++-*- osgVisual - Copyright (C) 2009-2010 Torben Dannhauer
 *
 * This library is based on OpenSceneGraph, open source and may be redistributed and/or modified under 
 * the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or
 * (at your option) any later version.  The full license is in LICENSE file
 * included with this distribution, and on the openscenegraph.org website.
 *
 * osgVisual requires for some proprietary modules a license from the correspondig manufacturer.
 * You have to aquire licenses for all used proprietary modules.
 * 
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * OpenSceneGraph Public License for more details.
*/

#include "visual_vista2D.h"


using namespace osgVisual;

visual_vista2D::visual_vista2D(void)
{
        OSG_NOTIFY (osg::ALWAYS ) << "visual_vista2D instantiated." << std::endl;

   // Create a Vista2D View
   view = new Vista2D::VistaView();

        vistaProjectfile = "";
        paintBackground = false;
        playanimation = false;
        position_x = 0;
        position_y = 0;
        zoom = 1;
}

visual_vista2D::~visual_vista2D(void)
{
        view->stopView();
}

void visual_vista2D::startVista2D()
{
    /***************
    load view
    ***************/
        view->load( vistaProjectfile );
    view->setBackgroundMode(paintBackground);   // don't paint background
        view->setPosition( position_x, position_y);
        view->setZoom( zoom );

    /***************
    start animation with
    self running datasource
    ***************/
    view->startView (playanimation);
}

bool visual_vista2D::processXMLConfiguration()
{
        // Init XML
        xmlDoc* tmpDoc;
        bool disabled;
        xmlNode* config = util::getModuleXMLConfig( configFileName, "vista2d", tmpDoc, disabled );

        if( disabled)
        {
                OSG_NOTIFY( osg::ALWAYS ) << "..disabled by XML configuration file." << std::endl;
                return false;
        }
        
        // extract configuration values
        if(config)
        {
                xmlNode* a_node = config->children;

                for (xmlNode *cur_node = a_node; cur_node; cur_node = cur_node->next)
                {
                std::string node_name=reinterpret_cast<const char*>(cur_node->name);
                        //OSG_ALWAYS << "----visual_vista2D::processXMLConfiguration() - node type="<< cur_node->type <<", name=" << cur_node->name << std::endl;

                        // Check for vista2d node
                        if(cur_node->type == XML_ELEMENT_NODE && node_name == "vista2d")
                        {
                                // Check attributes
                                xmlAttr  *attr = cur_node->properties;
                                while ( attr ) 
                                { 
                                        std::string attr_name=reinterpret_cast<const char*>(attr->name);
                                        std::string attr_value=reinterpret_cast<const char*>(attr->children->content);

                                        if( attr_name == "filename" )
                                        {
                                                vistaProjectfile=attr_value;
                                        }

                                        if( attr_name == "paintBackground" )
                                        {
                                                paintBackground = (attr_value == "yes") ? true : false;
                                        }

                                        if( attr_name == "position_x" )
                                        {
                                                std::stringstream sstr(attr_value);
                                                sstr >> position_x;
                                        }

                                        if( attr_name == "position_y" )
                                        {
                                                std::stringstream sstr(attr_value);
                                                sstr >> position_y;
                                        }

                                        if( attr_name == "zoom" )
                                        {
                                                std::stringstream sstr(attr_value);
                                                sstr >> zoom;
                                        }

                                        if( attr_name == "playanimation" )
                                        {
                                                playanimation = (attr_value == "yes") ? true : false;
                                        }

                                        attr = attr->next;
                                }       // WHILE attr END
                        }       // IF node == vista2d END
                }       // FOR end
        
                // clean up
                xmlFreeDoc(tmpDoc); xmlCleanupParser();
                return true;
        }       // IF Config valid END
        else
        {
                OSG_WARN << "ERROR: visual_vista2D::processXMLConfiguration() - Module configuration not found" << std::endl;
                return false;
        }

        return true;
}

bool visual_vista2D::init( osg::CoordinateSystemNode *sceneGraphRoot_, std::string configFileName )
{
        OSG_NOTIFY (osg::ALWAYS ) << "visual_vista2D initialize..";  // The sentence is finished by the init result...

        this->configFileName = configFileName;

        // Process XML configuration
        if(!processXMLConfiguration())
                return false;   // Abort vista2D initialization.

        // Check if Vista2D project file exists
        if ( !osgDB::fileExists(vistaProjectfile) )
        {
                OSG_ALWAYS << "WARNING: visual_vista2D::init() - Specified vista2D projectfile '"<< vistaProjectfile <<"' does not exist! Skip using Vista2D!" << std::endl;
                return false;
        }

   osg::Geode* vista2Dgeode = new osg::Geode();
   // Projection node for defining view frustrum for the vista2D-SceneOverlay:
   osg::Projection* vista2DProjectionMatrix = new osg::Projection;

    // Initialize the projection matrix for viewing everything we
   // will add as descendants of this node. Use screen coordinates
   // to define the horizontal and vertical extent of the projection
   // matrix. Positions described under this node will equate to
   // pixel coordinates.
   vista2DProjectionMatrix->setMatrix(osg::Matrix::ortho2D(0,1600,0,900)); /** todo: use screen size dynamically. */
  
   // For the HUD model view matrix use an identity matrix:
   osg::MatrixTransform* vista2DModelViewMatrix = new osg::MatrixTransform;
   vista2DModelViewMatrix->setMatrix(osg::Matrix::identity());

   // Make sure the model view matrix is not affected by any transforms
   // above it in the scene graph:
   vista2DModelViewMatrix->setReferenceFrame(osg::Transform::ABSOLUTE_RF);

   // Set Stateset of vista2DGeode Renderbin to render quite late..
        osg::StateSet* vista2DoverlayStateSet = vista2Dgeode->getOrCreateStateSet();
        vista2DoverlayStateSet->setRenderBinDetails( 99, "RenderBin");

   // Add the HUD projection matrix as a child of the root node
   // and the HUD model view matrix as a child of the projection matrix
   // Anything under this node will be viewed using this projection matrix
   // and positioned with this model view matrix.
   vista2DProjectionMatrix->addChild(vista2DModelViewMatrix);

   // Add the Geometry node to contain HUD geometry as a child of the
   // HUD model view matrix.
   vista2DModelViewMatrix->addChild( vista2Dgeode );

        // Add Payload: Vista2D                 
        startVista2D();

        // Add this class to the scene Graph
        this->setUseDisplayList( false );
        vista2Dgeode->addDrawable( this );

        sceneGraphRoot_->addChild( vista2DProjectionMatrix );
        return true;
}

void visual_vista2D::drawImplementation(osg::RenderInfo& renderInfo) const
{
        // save OSG-State
        osg::ref_ptr<osg::StateSet> clonedStateSet = reinterpret_cast<osg::StateSet*>( renderInfo.getCurrentCamera()->getOrCreateStateSet()->clone(osg::CopyOp::DEEP_COPY_ALL) );

        // Draw View
    view->draw();

        // restore OSG-State
        renderInfo.getCurrentCamera()->setStateSet( clonedStateSet );

}

osg::Object* visual_vista2D::cloneType() const
{
        return NULL;
}

osg::Object* visual_vista2D::clone(const osg::CopyOp& copyop) const
{ 
        return NULL;
}