FGFS-4.1/OpenSceneGraph
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Reordered set up of scene and event handlers to prevent warning

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This commit is contained in:
Robert Osfield
2008-03-28 15:28:03 +00:00
parent 497854cb2f
commit 49accb1635
1 changed files with 54 additions and 49 deletions
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103
examples/osgmultitexturecontrol/osgmultitexturecontrol.cpp
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@@ -189,53 +189,6 @@ int main( int argc, char **argv )
// construct the viewer.
osgViewer::Viewer viewer(arguments);
// load the nodes from the commandline arguments.
osg::Node* rootnode = osgDB::readNodeFiles(arguments);
if (!rootnode)
{
osg::notify(osg::NOTICE)<<"Warning: no valid data loaded, please specify a database on the command line."<<std::endl;
return 1;
}
osgTerrain::Terrain* terrain = findTopMostNodeOfType<osgTerrain::Terrain>(rootnode);
if (!terrain)
{
terrain = new osgTerrain::Terrain;
terrain->addChild(rootnode);
rootnode = terrain;
}
osg::CoordinateSystemNode* csn = findTopMostNodeOfType<osg::CoordinateSystemNode>(rootnode);
unsigned int numLayers = 1;
osgFX::MultiTextureControl* mtc = findTopMostNodeOfType<osgFX::MultiTextureControl>(rootnode);
if (mtc)
{
numLayers = mtc->getNumTextureWeights();
}
if (numLayers<2)
{
osg::notify(osg::NOTICE)<<"Warning: scene must have MultiTextureControl node with at least 2 texture units defined."<<std::endl;
return 1;
}
double maxElevationTransition = 1e6;
ElevationLayerBlendingCallback::Elevations elevations;
for(unsigned int i=0; i<numLayers; ++i)
{
elevations.push_back(maxElevationTransition);
maxElevationTransition /= 2.0;
}
ElevationLayerBlendingCallback* elbc = new ElevationLayerBlendingCallback(mtc, elevations);
// assign to the most appropriate node (the CoordinateSystemNode is best as it provides the elevation on the globe.)
if (csn) csn->setCullCallback(elbc);
else if (mtc) mtc->setCullCallback(elbc);
else rootnode->setCullCallback(elbc);
// add all the event handlers to the viewer
{
@@ -261,6 +214,7 @@ int main( int argc, char **argv )
viewer.addEventHandler(new osgViewer::LODScaleHandler);
}
// add all the camera manipulators
{
osg::ref_ptr<osgGA::KeySwitchMatrixManipulator> keyswitchManipulator = new osgGA::KeySwitchMatrixManipulator;
@@ -289,8 +243,59 @@ int main( int argc, char **argv )
viewer.setCameraManipulator( keyswitchManipulator.get() );
}
// add a viewport to the viewer and attach the scene graph.
viewer.setSceneData( rootnode );
// set up the scene graph
{
// load the nodes from the commandline arguments.
osg::Node* rootnode = osgDB::readNodeFiles(arguments);
if (!rootnode)
{
osg::notify(osg::NOTICE)<<"Warning: no valid data loaded, please specify a database on the command line."<<std::endl;
return 1;
}
osgTerrain::Terrain* terrain = findTopMostNodeOfType<osgTerrain::Terrain>(rootnode);
if (!terrain)
{
terrain = new osgTerrain::Terrain;
terrain->addChild(rootnode);
rootnode = terrain;
}
osg::CoordinateSystemNode* csn = findTopMostNodeOfType<osg::CoordinateSystemNode>(rootnode);
unsigned int numLayers = 1;
osgFX::MultiTextureControl* mtc = findTopMostNodeOfType<osgFX::MultiTextureControl>(rootnode);
if (mtc)
{
numLayers = mtc->getNumTextureWeights();
}
if (numLayers<2)
{
osg::notify(osg::NOTICE)<<"Warning: scene must have MultiTextureControl node with at least 2 texture units defined."<<std::endl;
return 1;
}
double maxElevationTransition = 1e6;
ElevationLayerBlendingCallback::Elevations elevations;
for(unsigned int i=0; i<numLayers; ++i)
{
elevations.push_back(maxElevationTransition);
maxElevationTransition /= 2.0;
}
ElevationLayerBlendingCallback* elbc = new ElevationLayerBlendingCallback(mtc, elevations);
// assign to the most appropriate node (the CoordinateSystemNode is best as it provides the elevation on the globe.)
if (csn) csn->setCullCallback(elbc);
else if (mtc) mtc->setCullCallback(elbc);
else rootnode->setCullCallback(elbc);
// add a viewport to the viewer and attach the scene graph.
viewer.setSceneData( rootnode );
}
// create the windows and run the threads.
viewer.realize();