FGFS-4.1/OpenSceneGraph
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Added optimization of the mutliple cessna shadow model to address peformance issues when rendering 100 cessna's.

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This commit is contained in:
Robert Osfield
2011-09-06 14:13:13 +00:00
parent f95f43dbc6
commit f26ef2d9e0
1 changed files with 33 additions and 5 deletions
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38
examples/osgshadow/osgshadow.cpp
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@@ -45,6 +45,8 @@
#include <osgShadow/StandardShadowMap>
#include <osgShadow/ViewDependentShadowMap>
#include <osgUtil/Optimizer>
#include <osgDB/ReadFile>
#include <osgDB/WriteFile>
@@ -584,6 +586,26 @@ namespace ModelThree
namespace ModelFive
{
struct UseVBOVisitor : public osg::NodeVisitor
{
UseVBOVisitor():
osg::NodeVisitor(osg::NodeVisitor::TRAVERSE_ALL_CHILDREN) {}
virtual void apply(osg::Geode& geode)
{
for(unsigned int i=0; i<geode.getNumDrawables(); ++i)
{
osg::Geometry* geometry = dynamic_cast<osg::Geometry*>(geode.getDrawable(i));
if (geometry)
{
OSG_NOTICE<<"geometry->setUseVertexBufferObjects(true);"<<std::endl;
geometry->setUseVertexBufferObjects(true);
}
}
}
};
osg::AnimationPathCallback* createAnimationPathCallback( float radius, float time )
{
osg::ref_ptr<osg::AnimationPath> path = new osg::AnimationPath;
@@ -607,20 +629,17 @@ namespace ModelFive
osg::Group* createModel(osg::ArgumentParser& arguments)
{
unsigned int rcvShadowMask = 0x1;
unsigned int castShadowMask = 0x2;
// Set the ground (only receives shadow)
osg::ref_ptr<osg::MatrixTransform> groundNode = new osg::MatrixTransform;
groundNode->addChild( osgDB::readNodeFile("lz.osg") );
groundNode->setMatrix( osg::Matrix::translate(200.0f, 200.0f,-200.0f) );
//groundNode->setNodeMask( rcvShadowMask );
groundNode->setNodeMask( ReceivesShadowTraversalMask );
// Set the cessna (only casts shadow)
osg::ref_ptr<osg::MatrixTransform> cessnaNode = new osg::MatrixTransform;
cessnaNode->addChild( osgDB::readNodeFile("cessna.osg.0,0,90.rot") );
cessnaNode->addUpdateCallback( createAnimationPathCallback(50.0f, 6.0f) );
//cessnaNode->setNodeMask( castShadowMask );
cessnaNode->setNodeMask( CastsShadowTraversalMask );
osg::ref_ptr<osg::Group> shadowRoot = new osg::Group;
shadowRoot->addChild( groundNode.get() );
@@ -635,6 +654,15 @@ namespace ModelFive
}
}
// cessna is really poorly optimized so fix this by optimizing the mesh and use VBO's.
osgUtil::Optimizer optimizer;
optimizer.optimize(shadowRoot.get(), osgUtil::Optimizer::INDEX_MESH |
osgUtil::Optimizer::VERTEX_POSTTRANSFORM |
osgUtil::Optimizer::VERTEX_PRETRANSFORM);
UseVBOVisitor useVBOVisitor;
shadowRoot->accept(useVBOVisitor);
return shadowRoot.release();
}
}