Hi Thorsten, > De: "Renk Thorsten" <thorsten.i.r...@jyu.fi> > À: "FlightGear developers discussions" > <flightgear-devel@lists.sourceforge.net> > Envoyé: Samedi 10 Novembre 2012 13:34:30 > Objet: Re: [Flightgear-devel] Moonlight reloaded > > > If you need any information about the moon's position and/or phase, > > just > > let me know. It should be trivial to extract these values from the > > ephemeris code. > > Thanks, that was what I was hoping for :-) > > It depends a bit on if Fred wants to do anything with the moon - my > scheme would be fine with the angle of the moon above the horizon > and the moon phase (or, as Curt explained, equivalently the relative > angle between sun and moon) as properties. I think I have a > brightness curve of moonlight as a function of phase somewhere, so > from there I'd be good. > > However, if we want directional moonlight in Rembrandt, then I guess > the info has to flow to the shader in a more direct way (like > gl_LightSource[1].position) - in which case I'd use it from there.
Don't wait for me. Anyway, sun direction and colors are given to shader via normal uniforms that are updated here (in Rembrandt mode only) : http://gitorious.org/fg/flightgear/blobs/next/src/Viewer/renderer.cxx#line1570 Moon equivalent should go the same way. I just don't have an idea on own to balance sun light and moon light without knowing the time of day or having test on the light direction. I suspect the difference in light intensity (dynamic range) doesn't fit in an 8-bit 3-component color. I was also thinking about replacing sun values by the one from the moon during night in the C++ code, without telling to the shaders. I didn't ponder on the cons of that approach thought. Regards, -Fred ------------------------------------------------------------------------------ Everyone hates slow websites. So do we. Make your web apps faster with AppDynamics Download AppDynamics Lite for free today: http://p.sf.net/sfu/appdyn_d2d_nov _______________________________________________ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
