FGFS-4.1/OpenSceneGraph
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Implemented more SceneView operations in main as a move to try and replace SceneView usage in this example.

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This commit is contained in:
Robert Osfield 2005-08-18 08:37:01 +00:00
parent e98102219b
commit db3fe3fd3b
1 changed files with 62 additions and 13 deletions
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75
examples/osgcamera/osgcamera.cpp
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@ -13,6 +13,18 @@
#include <iostream>
////////////////////////////////////////////////////////////////////////////////
//
//
// **************** THIS IS AN EXPERIMENTAL IMPLEMENTATION ***************
// ************************** PLEASE DO NOT COPY ************************
//
//
///////////////////////////////////////////////////////////////////////////////
#if 1
int main( int argc, char **argv )
@ -53,7 +65,13 @@ int main( int argc, char **argv )
// create the view of the scene.
osg::ref_ptr<osg::CameraNode> camera = new osg::CameraNode;
camera->setRenderOrder(osg::CameraNode::NESTED_RENDER);
camera->setClearColor(osg::Vec4(1.0f,1.0f,0.0f,1.0f));
camera->setCullingActive(false);
camera->addChild(loadedModel.get());
// initialize the view to look at the center of the scene graph
const osg::BoundingSphere& bs = loadedModel->getBound();
@ -71,7 +89,8 @@ int main( int argc, char **argv )
osg::ref_ptr<osgUtil::UpdateVisitor> updateVisitor = new osgUtil::UpdateVisitor;
osg::ref_ptr<osgUtil::CullVisitor> cullVisitor = new osgUtil::CullVisitor;
cullVisitor->setRenderGraph(new osgUtil::RenderGraph);
osg::ref_ptr<osgUtil::RenderGraph> renderGraph = new osgUtil::RenderGraph;
cullVisitor->setRenderGraph(renderGraph.get());
osg::ref_ptr<osgUtil::RenderStage> renderStage = new osgUtil::RenderStage;
cullVisitor->setRenderStage(renderStage.get());
@ -85,20 +104,11 @@ int main( int argc, char **argv )
frameStamp->setFrameNumber(frameNum++);
updateVisitor->reset();
cullVisitor->reset();
// pass frame stamp to the SceneView so that the update, cull and draw traversals all use the same FrameStamp
updateVisitor->setFrameStamp(frameStamp.get());
updateVisitor->setTraversalNumber(frameStamp->getFrameNumber());
cullVisitor->setFrameStamp(frameStamp.get());
cullVisitor->setTraversalNumber(frameStamp->getFrameNumber());
// update the viewport dimensions, incase the window has been resized.
camera->setViewport(0,0,traits->_width,traits->_height);
renderStage->setViewport(camera->getViewport());
cullVisitor->pushViewport(camera->getViewport());
// set the view
camera->setViewMatrix(viewMatrix);
@ -106,17 +116,56 @@ int main( int argc, char **argv )
// do the update traversal the scene graph - such as updating animations
camera->accept(*updateVisitor);
// do the cull traversal, collect all objects in the view frustum into a sorted set of rendering bins
camera->accept(*cullVisitor);
cullVisitor->reset();
cullVisitor->setFrameStamp(frameStamp.get());
cullVisitor->setTraversalNumber(frameStamp->getFrameNumber());
// update the viewport dimensions, incase the window has been resized.
camera->setViewport(0,0,traits->_width,traits->_height);
renderGraph->clean();
renderStage->reset();
renderStage->setViewport(camera->getViewport());
osg::ref_ptr<osg::RefMatrix> proj = new osg::RefMatrix(camera->getProjectionMatrix());
osg::ref_ptr<osg::RefMatrix> mv = new osg::RefMatrix(camera->getViewMatrix());
cullVisitor->pushViewport(camera->getViewport());
cullVisitor->pushProjectionMatrix(proj.get());
cullVisitor->pushModelViewMatrix(mv.get());
// do the cull traversal, collect all objects in the view frustum into a sorted set of rendering bins
//camera->accept(*cullVisitor);
loadedModel->accept(*cullVisitor);
cullVisitor->popModelViewMatrix();
cullVisitor->popProjectionMatrix();
cullVisitor->popViewport();
renderStage->sort();
// prune out any empty RenderGraph children.
// note, this would be not required if the rendergraph had been
// reset at the start of each frame (see top of this method) but
// a clean has been used instead to try to minimize the amount of
// allocation and deleteing of the RenderGraph nodes.
renderGraph->prune();
renderStage->setClearColor(osg::Vec4(1.0f,1.0f,1.0f,1.0f));
gfxc->getState()->setInitialViewMatrix(mv.get());
std::cout<<"before"<<std::endl;
// draw traversal
osgUtil::RenderLeaf* previous = NULL;
renderStage->draw(*(gfxc->getState()), previous);
// Swap Buffers
gfxc->swapBuffers();
std::cout<<"swap"<<std::endl;
}
return 0;