Quoting Roberto Inzerillo : > > > It just depends on the number of facets you used to model your aircraft. > You > > already know that a model is made of triangles and quads and if it looks > > rounded, it's only because colors are interpolated between vertices, > depending > > on normals. If you remove the 'smooth' attributes, you'll see that a quad > is > > fully lit or fully shaded because its normal point toward the sun or not. > > > > -Fred > > > Thanks Fred, I already know all that stuff about facets, normal > smoothing and so on :-) > The question regards the possibility (or impossibility) of FlightGear > (or the OpenGL interface) to proper render smoothed shadows. Those faces > in the image are already normal-smoothed, hence pixel colors are > interpolated between contiguous edges; you can clearly see how the grey > color of the rounded surfaces is smooth shaded. But the shadows are not. > Is this a FlightGear related issue or other graphic cards do smooth > those shadows too? > > Image http://www.laubfrosch.it/public/tmp/tie-005.jpg shows a rounded > surface which is not normal-smoothed either. Look at the difference. > That does pertain to surface colour interpolation only. My question > instead is about the shadows.
This is inherent of the shadow algorithm used. It will look the same for every video card you can get. The shadow volume algorithm only deals with the geometry, and doesn't know anything about the color interpolation trick that make a cube looks like a sphere. There are other shadow algorithm but I am not sure they are better in that department ( faces not directly lit by the light source ) -Fred -- Frédéric Bouvier http://frfoto.free.fr Photo gallery - album photo http://www.fotolia.fr/p/2278/partner/2278 Other photo gallery http://fgsd.sourceforge.net/ FlightGear Scenery Designer ------------------------------------------------------------------------- Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 _______________________________________________ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
