Hi Art and Robert,
First of all I dont use my own viewer class, I use osgViewer. I initialize
the viewer camera like this to support osgPPU :
// Set single thread model
viewer_.setThreadingModel(osgViewer::Viewer::SingleThreaded);
// Set the main window position and size
osg::ref_ptr<osg::GraphicsContext::Traits> traits = new
osg::GraphicsContext::Traits;
traits->x = windowProperties_.winXPos_;
traits->y = windowProperties_.winYPos_;
traits->width = windowProperties_.winWidth_;
traits->height = windowProperties_.winHeight_;
traits->windowDecoration = false;
traits->doubleBuffer = true;
traits->sharedContext = 0;
// Set the graphics context for the camera
osg::ref_ptr<osg::GraphicsContext> gc =
osg::GraphicsContext::createGraphicsContext(traits.get());
gc->setClearColor( osg::Vec4(0.0f, 0.0f, 0.0f, 1.0f) );
gc->setClearMask( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
gc->clear( );
viewer_.getCamera()->setGraphicsContext(gc.get());
// Set the viewport
viewer_.getCamera()->setViewport( viewportProperties_.viewportXPos_,
viewportProperties_.viewportYPos_,
viewportProperties_.viewportWidth_,
viewportProperties_.viewportHeight_ );
// Set the projection matrix as perspective
double aspectRatio;
if(
viewportProperties_.viewportWidth_/viewportProperties_.viewportHeight_ >=
1.0 )
aspectRatio =
viewportProperties_.viewportWidth_/viewportProperties_.viewportHeight_;
else
aspectRatio =
viewportProperties_.viewportHeight_/viewportProperties_.viewportWidth_;
viewer_.getCamera()->setProjectionMatrixAsPerspective(
cameraProperties_.cameraFovy_,
aspectRatio,
cameraProperties_.cameraZNear_, cameraProperties_.cameraZFar_ );
// Positioning the camera
osg::Matrix camTrans;
camTrans.makeTranslate( cameraProperties_.cameraPos_.x(),
cameraProperties_.cameraPos_.y(), -cameraProperties_.cameraPos_.z() );
viewer_.getCamera()->setViewMatrix( camTrans );
// tell the camera to use OpenGL frame buffer object where supported.
viewer_.getCamera()->setRenderTargetImplementation(osg::Camera::FRAME_BUFFER_OBJECT);
// create texture to render to
osg::Texture* texture = createRenderTexture(
viewportProperties_.viewportWidth_, viewportProperties_.viewportHeight_,
false );
osg::Texture* depthTexture = createRenderTexture(
viewportProperties_.viewportWidth_, viewportProperties_.viewportHeight_,
true);
// attach the texture and use it as the color and depth buffer.
viewer_.getCamera()->attach(osg::Camera::COLOR_BUFFER, texture);
viewer_.getCamera()->attach(osg::Camera::DEPTH_BUFFER, depthTexture);
Ok then I build my particle scene using osgParticle. I use a ModularEmitter
for the placer, shooter and counter.
Finally I set the osgPPU::Processor and attach all the unit I need for the
shader rendering. Then I set the viewer scene data and start the main loop
which look like this :
osg::Group * rootGroupNode = new osg::Group();
rootGroupNode->addChild( myParticleScene );
rootGroupNode->addChild( myOsgPpuProcessor );
viewer_.setSceneData( rootGroupNode_.get() );
while (!viewer_.done())
{
if( checkForNewMedias() )
updateSceneWithMedia();
updateScene();
// Draw the next frame.
rendering_ = true;
viewer_.frame();
rendering_ = false;
Sleep(1);
}
And the application crash with the error message I provide you. If I comment
these lines in my viewer application :
// Set single thread model
//viewer_.setThreadingModel(osgViewer::Viewer::SingleThreaded);
// tell the camera to use OpenGL frame buffer object where supported.
//viewer_.getCamera()->setRenderTargetImplementation(osg::Camera::FRAME_BUFFER_OBJECT);
// create texture to render to
//osg::Texture* texture = createRenderTexture(
viewportProperties_.viewportWidth_, viewportProperties_.viewportHeight_,
false );
//osg::Texture* depthTexture = createRenderTexture(
viewportProperties_.viewportWidth_, viewportProperties_.viewportHeight_,
true);
// attach the texture and use it as the color and depth buffer.
//viewer_.getCamera()->attach(osg::Camera::COLOR_BUFFER, texture);
//viewer_.getCamera()->attach(osg::Camera::DEPTH_BUFFER, depthTexture);
And don't attach the osgPPU::Processor to my rootGroupNode, everything works
well.
Hope I gave you enough informations, if you need more I'll provide you.
Thanks
Alex
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