[EMAIL PROTECTED] writes: > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA1 > > > On Wed, Feb 13, 2002 at 08:24:14PM -0600, Curtis L. Olson wrote: > > > the moon is using a blend mode other than the default blend mode > > so that we can blend it into the gradient sky. > > Thanks, that was exactly the information I needed to get me > started. > > In my first try I changed the call to glBlendFunc(): > > In SimGear-0.0.17pre2/simgear/src/sky/moon.cxx: sgMoonOrbPreDraw() > > - line 55: glBlendFunc ( GL_SRC_ALPHA, GL_ONE ) ; > + line 55: glBlendFunc ( GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA ) ; > > That worked, but made the moon look ugly. I could have been > satisfied at this point and take the ugly moon for granted. > However, on a hunch, I changed line 55 back and in > sgMoonOrbPostDraw() uncommented line 65: > > - line 65: // glBlendFunc ( GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA ) ; > + line 65: glBlendFunc ( GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA ) ; > > That works, _and_ produces a nice moon. So it appears that the > problem lies not with the blend function itself, but in the way > it is (not) handled by glPushAttrib()/glPopAttrib(). > > Does anyone object to leaving line 65 uncommented for now? Any > leads for a more permanent solution?
That seems like a reasonable compromise ... done. Curt. -- Curtis Olson IVLab / HumanFIRST Program FlightGear Project Twin Cities [EMAIL PROTECTED] [EMAIL PROTECTED] Minnesota http://www.menet.umn.edu/~curt http://www.flightgear.org _______________________________________________ Flightgear-devel mailing list [EMAIL PROTECTED] http://mail.flightgear.org/mailman/listinfo/flightgear-devel
