FGFS-4.1/OpenSceneGraph
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From Wang Rui, "A modified version is attached. The blank while generating is in fact

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used to avoid dual update traversals of the scene, which is not
allowed in my application (but I forgot the reason ;-) Now the blank
problem will disappear.

Inactive mode is also available, using the --inactive mode and
--camera-eye and --camera-hpr to set camera position:

./osgposter --output-poster --poster output.bmp --tilesize 800 600
--finalsize 8000 6000 cow.osg --inactive --camera-eye 0 0 20
"
This commit is contained in:
Robert Osfield 2010-12-14 08:53:20 +00:00
parent 3145837629
commit c0937c1614
1 changed files with 23 additions and 3 deletions
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26
examples/osgposter/osgposter.cpp
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@ -255,7 +255,7 @@ int main( int argc, char** argv )
int posterWidth = 640*2, posterHeight = 480*2; int posterWidth = 640*2, posterHeight = 480*2;
std::string posterName = "poster.bmp", extName = "bmp"; std::string posterName = "poster.bmp", extName = "bmp";
osg::Vec4 bgColor(0.2f, 0.2f, 0.6f, 1.0f); osg::Vec4 bgColor(0.2f, 0.2f, 0.6f, 1.0f);
osg::Camera::RenderTargetImplementation renderImplementation = osg::Camera::FRAME_BUFFER; osg::Camera::RenderTargetImplementation renderImplementation = osg::Camera::FRAME_BUFFER_OBJECT;
while ( arguments.read("--inactive") ) { activeMode = false; } while ( arguments.read("--inactive") ) { activeMode = false; }
while ( arguments.read("--color", bgColor.r(), bgColor.g(), bgColor.b()) ) {} while ( arguments.read("--color", bgColor.r(), bgColor.g(), bgColor.b()) ) {}
@ -330,16 +330,36 @@ int main( int argc, char** argv )
printer->setOutputPosterName( posterName ); printer->setOutputPosterName( posterName );
} }
// Create root and start the viewer #if 0
// While recording sub-images of the poster, the scene will always be traversed twice, from its two
// parent node: root and camera. Sometimes this may not be so comfortable.
// To prevent this behaviour, we can use a switch node to enable one parent and disable the other.
// However, the solution also needs to be used with care, as the window will go blank while taking
// snapshots and recover later.
osg::ref_ptr<osg::Switch> root = new osg::Switch; osg::ref_ptr<osg::Switch> root = new osg::Switch;
root->addChild( scene, true ); root->addChild( scene, true );
root->addChild( camera.get(), false ); root->addChild( camera.get(), false );
#else
osg::ref_ptr<osg::Group> root = new osg::Group;
root->addChild( scene );
root->addChild( camera.get() );
#endif
osgViewer::Viewer viewer; osgViewer::Viewer viewer;
viewer.setUpViewInWindow( 100, 100, tileWidth, tileHeight );
viewer.setSceneData( root.get() ); viewer.setSceneData( root.get() );
viewer.getDatabasePager()->setDoPreCompile( false ); viewer.getDatabasePager()->setDoPreCompile( false );
if ( renderImplementation==osg::Camera::FRAME_BUFFER )
{
// FRAME_BUFFER requires the window resolution equal or greater than the to-be-copied size
viewer.setUpViewInWindow( 100, 100, tileWidth, tileHeight );
}
else
{
// We want to see the console output, so just render in a window
viewer.setUpViewInWindow( 100, 100, 800, 600 );
}
if ( activeMode ) if ( activeMode )
{ {
viewer.addEventHandler( new PrintPosterHandler(printer.get()) ); viewer.addEventHandler( new PrintPosterHandler(printer.get()) );