Erik Hofman wrote: > Ampere K. Hardraade wrote: > > I have found another thing that is quite interesting. May be this have > > something to do with the fact that the opacity of my objects is 98%, but > > FlightGear seem to have trouble displaying multiple partially transparent > > objects that are overlapping one another. > > Yes, but that's really an OpenGL problem rather than a FlightGear problem. > > > For example, if I have a plane with a transparent circle in the middile, and > > behind it is another plane with a transparent circle in the middle, you won't > > be able to see the second plane at all through the transparent portion in the > > first plane. > > (Semi) transparent objects should be sorted by distance from back to > front. In some cases it is possible to determine the order beforehand In > case of a HUD for example, it is best to define the canopy before the > HUD because in the pilot seat every thing looks like it should be (yes > knoe the F-16 has this problem right now) and from the outside few one > barely would notice the difference. > > I believe Frederic has written an animation that does this automatically > which is called alpha-test.
alpha-test really works well for fully transparent object because it avoid blending by discarding fragments that have alpha below a clamp value. I also described a method for sorting objects in the animation file : http://baron.flightgear.org/pipermail/flightgear-devel/2004-June/028631.html HTH -Fred _______________________________________________ Flightgear-devel mailing list [EMAIL PROTECTED] http://mail.flightgear.org/mailman/listinfo/flightgear-devel
