Thanks Fred, this pretty much addresses all my questions. > Light objects are built in simgear/scene/tgdb/pt_lights.cxx > There effect is built in C++ in the getLightEffect function. It is not > configurable as it is now. Ideally, this function should be replaced > by a lookup in the material file to find a configurable effect. > But I didn't thought about the implications of doing so.
Okay, then I'm not going crazy and can't really address this from the effect/shader side without touching the core. Could I request implementing a lookup as a non-urgent feature request? This is needed to get true low visibility scenes rendered properly, but I think not among the most pressing problems. > Precipitations use the OSG particle effect. I don't thing it is something > configurable as the shader is coded in OSG C++ code. Maybe this is > something we should try rewriting in order to make the lighting > different. The implementation of the effect is in > simgear/environment/precipitation.cxx Well... maybe let's just leave it as it is - personally I am not much bothered by the precipitation lighting, and this sounds like a non-trivial issue to fix. > Problem : it consumes GPU memory even if the technique requiring > the extra attributes is not selected Hm, I see.... Can a geometry shader potentially compute the curvature and pass it on? I mean, having a triangle with adjacency info must be good for something like this, right? Stuart: > I don't think there's a sensible way to generate additional trees at > 50-100m. With the changes described above, the overall memory > occupancy of trees should go down, so perhaps it won't matter as much? I was thinking fern, grass, undergrowth,... - these would have a density ~100 times higher than trees, so even just storing the coordinate point if it is created at tile creation time would be a major drain, and the whole thing would only remain manageable if really only the close vicinity is stored - which means it needs to be created on the fly as you approach an area. * Thorsten ------------------------------------------------------------------------------ Precog is a next-generation analytics platform capable of advanced analytics on semi-structured data. The platform includes APIs for building apps and a phenomenal toolset for data science. Developers can use our toolset for easy data analysis & visualization. Get a free account! http://www2.precog.com/precogplatform/slashdotnewsletter _______________________________________________ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
