Hi Ryan,
2006/10/19, Kawicki, Ryan H <[EMAIL PROTECTED]>:
... the depth write mask seems to have been turned off.
The new loader disables writing to the depht buffer and sets the
render bin for subfaces.
You could try to remove this code (GeometryRecords.cpp) in the loader
and see if it helps.
Also try to disable optimizers with reader option "preserveFace" and
see if it makes a difference.
Brede
2006/10/19, Kawicki, Ryan H <[EMAIL PROTECTED]>:
I have a situation where I am using the new OpenFlight plugin with DDS
textures bound to the model. Our application uses a layering approach
to render symbols. After a layer is rendered, the depth buffer is
cleared and the next layer is rendered. What I am seeing is our models
seem to not follow this layering approach. We keep a collection of
group nodes which represent our layers and set the renderbin for this
collection of nodes to the particular layer. I also tested with a model
that had a RGB texture assigned to it and using the old OpenFlight
plugin, and this problem seems not to happen.
What I have noticed is that the rendering order is correct, so I cannot
say that the render bins are being constructed in some different manor
than what is being specified, but what I have found is that the depth
write mask seems to have been turned off. I am still looking into why
this would be the case, but, again, this seems to only effect DDS
textures and the new OpenFlight plugin. Is this the intended behavior?
I would not think it to be, but I am not sure. Any ideas on where I
might start looking for this problem. I have a couple of screen
captures of the problem and the code that produces the problem is below.
Thanks for the help.
<<TwoLayerNewOpenFlight.jpg>> <<TwoLayerOldOpenFlight.jpg>>
<<TwoLayerNewOpenFlightDepthMaskTrue.jpg>>
// osg includes
#include <osgText\Text>
#include <osgDB\ReadFile>
#include <osgProducer\Viewer>
#include <osg\MatrixTransform>
// libraries to include
#ifdef _DEBUG
#pragma comment( lib, "OSGd.lib" )
#pragma comment( lib, "OSGDBd.lib" )
#pragma comment( lib, "OSGUtild.lib" )
#pragma comment( lib, "OSGTextd.lib" )
#pragma comment( lib, "OSGProducerd.lib" )
#else
#pragma comment( lib, "OSG.lib" )
#pragma comment( lib, "OSGDB.lib" )
#pragma comment( lib, "OSGUtil.lib" )
#pragma comment( lib, "OSGText.lib" )
#pragma comment( lib, "OSGProducer.lib" )
#endif
#pragma comment( lib, "OpenGL32.lib" )
class ClearRenderBinDepthBuffer : public
osgUtil::RenderBin::DrawCallback
{
public:
// constructor
ClearRenderBinDepthBuffer( ) : m_nNested ( 0 )
{
}
virtual void drawImplementation( osgUtil::RenderBin * pBin,
osg::State & rState,
osgUtil::RenderLeaf *& ppPrevious )
{
if (m_nNested++)
{
pBin->drawImplementation(rState, ppPrevious);
}
else
{
if (pBin->getBinNum() > 0)
{
//glDepthMask(GL_TRUE);
GLboolean write_mask = GL_FALSE;
glGetBooleanv(GL_DEPTH_WRITEMASK, &write_mask);
glClear(GL_DEPTH_BUFFER_BIT);
}
pBin->drawImplementation(rState, ppPrevious);
}
--m_nNested;
}
private:
int m_nNested;
};
// main entry for the program
int main( int argc, char ** argv )
{
//putenv("OSG_OPEN_FLIGHT_PLUGIN=old");
// viewer class the visualize the scene
osgProducer::Viewer osgViewer;
// allow the viewer the pleasures of being standard
osgViewer.setUpViewer();
// create a root level group node
osg::Group * pRootGrp = new osg::Group;
// create the to layer nodes ( layers 0 and 1 )
osg::Group * pLayer0Grp = new osg::Group;
osg::Group * pLayer1Grp = new osg::Group;
// modify the state sets for each layer
pLayer0Grp->getOrCreateStateSet()->setRenderBinDetails(0,
"RenderBin");
pLayer1Grp->getOrCreateStateSet()->setRenderBinDetails(1,
"RenderBin");
// load the cessna
osg::Node * pHornet1 =
osgDB::readNodeFile("fa18c-hornet_usmc-armed-xt_v2.0\\fa18c-hornet_usmc-
armed-xt.flt");
osg::Node * pHornet2 = osgDB::readNodeFile("f18c_hornet_usnavy.flt");
// create a text object
osgText::Text * pText = new osgText::Text;
// setup the text attributes
pText->setCharacterSize(24.0f);
pText->setAxisAlignment(osgText::Text::SCREEN);
pText->setAlignment(osgText::Text::CENTER_CENTER);
pText->setCharacterSizeMode(osgText::Text::SCREEN_COORDS);
pText->setText("This is a test of the\nnational broadcast
system!!!");
pText->setBackdropType(osgText::Text::BackdropType::OUTLINE);
// create a geode to house the text
osg::Geode * pTextGeode = new osg::Geode;
pTextGeode->addDrawable(pText);
// create a matrix transform to translate the text infront of the
cessna
osg::MatrixTransform * pTextMatTrans = new osg::MatrixTransform;
osg::MatrixTransform * pHorn1MatTrans = new osg::MatrixTransform;
osg::MatrixTransform * pHorn2MatTrans = new osg::MatrixTransform;
pTextMatTrans->setMatrix(osg::Matrix::translate(0.0, -100.0, 0.0));
pHorn1MatTrans = new
osg::MatrixTransform(osg::Matrix::translate(-10.0, 0.0, 0.0));
pHorn2MatTrans = new
osg::MatrixTransform(osg::Matrix::translate(10.0, 0.0, 0.0));
// add the geode to the transform
//pTextMatTrans->addChild(pTextGeode);
pTextMatTrans->addChild(pHornet2);
pHorn1MatTrans->addChild(pHornet2);
//pHorn2MatTrans->addChild(pHornet2);
// attach the objects to their respective groups
pLayer0Grp->addChild(pHorn1MatTrans);
//pLayer0Grp->addChild(pHorn2MatTrans);
pLayer1Grp->addChild(pTextMatTrans);
// attach the layers to the root
pRootGrp->addChild(pLayer0Grp);
pRootGrp->addChild(pLayer1Grp);
// add the data to the scene graph
osgViewer.setSceneData(pRootGrp);
// create a clear depth buffer object
ClearRenderBinDepthBuffer * pDepthBufferClearCB = new
ClearRenderBinDepthBuffer;
// setup the default renderbin callbacks
osgUtil::RenderBin::getRenderBinPrototype("RenderBin")->setDrawCallback(
pDepthBufferClearCB);
// create the window and run threads
osgViewer.realize();
while (!osgViewer.done())
{
// wait for all cull and draw threads
osgViewer.sync();
// update the scene
osgViewer.update();
// cull and draw portion
osgViewer.frame();
}
// wait for completion
osgViewer.sync();
// run clean up procedures
osgViewer.cleanup_frame();
// wiat for clean up completion
osgViewer.sync();
return 0;
}
Ryan Kawicki
Software Engineer
The Boeing Company
Training Systems and Services
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