Hi,
I am new to OSG. I am trying to draw a lot of spheres into a scene. By lots I
mean on the order of a 100,000 or so. This really brings my simple test app to
its knees. Here is the current way I am drawing these spheres:
Code:
osg::Sphere *unitSphere = new osg::Sphere(osg::Vec3(0,0,0),5.0);
osg::ShapeDrawable* unitSphereDrawable = new osg::ShapeDrawable(unitSphere);
for(1...100,000)
{
osg::PositionAttitudeTransformation *shpereXForm = new
osg::PositionAttitudeTransformation();
sphereXForm->setPosition(position);
osg::Geode* unitShpereGeode = new osg::Geode();
sphereXForm->addChild(unitSphereGeode);
unitSphereGeode->addDrawable(draw);
GetScene()->AddDrawable(unitSphereGeode);
}
Our current product uses straight 2D OpenGL calls and uses points instead of
spheres to draw the dataset. We are currently porting everything to 3D using
OSG and found that we might have to do something unique when it comes to
displaying the dataset we are trying to display. The dataset we are trying to
draw doesn't persist over time. Its there one second and gone the next. I
need a quick way to draw lot of spheres very quickly. I have started looking
into overriding the Camera::DrawCallback and add raw OpenGL calls. Is this the
right path to look down or is there something easier?
I apologize in advance if there is a simple answer to this that a newb like me
should have seen or something I am doing completely wrong.
Thank you!
Cheers.
------------------
Read this topic online here:
http://forum.openscenegraph.org/viewtopic.php?p=21774#21774
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