Hi Ovidiu.
The technique you are after is best served by using an Render To
Texture (RTT) camera at the resolution you want, then re render the
scene at the final resolution. The osgdistortion example is the
closest example to what you will need. You won't need to the
distortion of course, but the rest of the setup will be very similar.
Robert.
On 3/20/07, Ovidiu Sabou <[EMAIL PROTECTED]> wrote:
Hello!
I want to implement a method for reducing the draw resolution when the fill
rate is very low, but without resizing the window. I am going to use this
while the camera is moving(most of the time, the viewpoint and view
direction are static). My first solution was to add a new camera and
after each update, set the scene data to a
node containing that camera and a quad with
a texture that the normal scene has been previously
rendered to at a lower resolution than the
viewport.
The current main loop looks like this:
while( !viewer.done() )
{
viewer.sync();
viewer.setSceneData(loadedModel.get());
viewer.updatedSceneData();
viewer.update();
viewer.setSceneData(rootNode.get());
viewer.updatedSceneData();
camera->setProjectionMatrix(viewerCamera->getProjectionMatrix());
camera->setViewport(0, 0, texWidth, texHeight);
camera->setViewMatrix(viewerCamera->getViewMatrix());
viewer.frame();
}
rootNode contains the quad and the new camera.
viewerCamera is the first one from osgProducer::Viewer.
This thing works, but I am not sure I am doing the right thing. What do you
think about this and how should I actually implement what I want ?
Thanks
Ovidiu
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