Hi Brian, It sounds like you are going in the right direction w.r.t checking osg::State for the current value of a uniform. I haven't ever used State for checking current uniform values though, its really not a common thing that one would want to do. If you can't get access to the values you need then feel free to add a public method to osg::State for access it and submit the change.
A big but though... using a uniform value to determine if you are rendering in the main viewer camera or within a RTT camera doesn't seem appropriate. This type of querry is probably based handled via the RenderInfo data structure introduced in 2.0, not drawImplementation() now takes a RenderInfo object which has the current osg::State object. RenderInfo also has the current View. In your case both Cameras are rendering the same view so will be sharing the same View. Adding in the current active Camera to RenderInfo seems resonable, perhaps a stack of cameras would be most suitable. src/osgUtil/RenderStage.cpp would need to push/pop Cameras off this stack as it does the draw traversal. Again feel free to code such as solution and submit it to me. Robert. On 7/11/07, Brian <[EMAIL PROTECTED]> wrote:
Hi, I have a scene in which I have a main camera and a camera node that renders to texture. Both cameras render the same basic scene with the main difference being the RTT scene is rendered gray scale. The gray scale is accomplished via a shader. The scene renders fine, but I have recently added a custom drawable to the mix and would like to determine the state of the uniform that toggles the gray scale. In my camera node, I have this uniform overridden to 1, otherwise it is set to 0. How can I determine the active state of this uniform in my drawImplementation? I've tried getting the active stateset and querying for the uniform. The query returns NULL. However, if I set a breakpoint inside my drawImplementation and set a watch deep within the state's _uniformMap, I can verify that the value of this uniform is toggling from 0 to 1 like it should. How do I get to this information since a majority of it is protected? I need it to determine which camera is rendering the scene. Thanks, Brian _______________________________________________ osg-users mailing list osg-users@openscenegraph.net http://openscenegraph.net/mailman/listinfo/osg-users http://www.openscenegraph.org/
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