Hello,
I am surprised about my little test program. I would like compare displaylists
with frame buffer objects. Because, I suppose that the displaylists have to be
faster than the vbo, because the displaylists are precompiled. But in my
example I get another result:
VBO: 225 FPS
DL: 88 FPS
Is that possible?
Following a part of my code:
--------------------------------
// Geometry (Grid-Plane)
::osg::Geometry* geom = new osg::Geometry;
// Vertex Array (Grid with 1000 x 1000 quads)
::osg::ref_ptr< ::osg::Vec3Array > v = new ::osg::Vec3Array();
for(unsigned int x=0; x < 1000; x++)
{
for(unsigned int y=0; y < 1000; y++)
{
// create points
}
}
geom->setVertexArray(v);
#ifdef ENABLE_VBO
// Vertex Buffer Object
osg::VertexBufferObject* vbo = geom->getOrCreateVertexBufferObject();
vbo->setArray(0,v);
vbo->setUsage(GL_STATIC_DRAW);
geom->setUseVertexBufferObjects(true);
geom->setSupportsDisplayList(false);
geom->setUseDisplayList(false);
#else
geom->setSupportsDisplayList(true);
geom->setUseDisplayList(true);
#endif
// Primitive
::osg::DrawArrays* da = new
::osg::DrawArrays(::osg::PrimitiveSet::QUADS,0,v->size());
geom->addPrimitiveSet(da);
// Geometry Node
::osg::Geode* geode = new osg::Geode;
geode->addDrawable(geom);
----------------------------------------
Thanks
Martin
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