Hi Aurelien, On 21 March 2012 09:20, Aurelien Albert <[email protected]> wrote: > I've tested the solution based on the camera stateset, but it's not fuly > satisfying because when the leaf node object is remove from the graph, the > uniform and the stateset are still affected to the camera.
Could you just remove the uniform when you remove the leaf node? Or reset the uniforms value? > So I'm interested by the positional state special case : how can I add a > stateattribute (uniform) to the positional state from a leaf node ? Right now there isn't a mechanism in the OSG for treating uniforms as positional state. This is something I was expecting to need to implement in some form in support of ShaderComposition, but it needn't wait for this to be completed. To have a positional uniform one would need probably use a base Uniform that provides the basic value then have the this Uniform cloned in the RenderStage and set to whatever value is appropriate. For an equivalent to gl_Light/gl_TexGen etc you'd need to multiple the value by the current modelview matrix. One might also want a more general way of doing global uniforms as well, where the modelview matrix isn't required, so it's isn't a positional state. Robert. _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
