Brede and Robert, But my the RGB components of the imagery in my database are still black where the alpha < 1.0. This must be done during the model building process I suspect. Any ideas?
-B --- RSC BDC > -----Original Message----- > From: Brad Colbert > Sent: Thursday, September 07, 2006 8:45 AM > To: 'Brede Johansen'; Robert Osfield > Subject: RE: [osg-users] OSGDEM database is black where alpha < 1.0 > > Brede, > > I got it, thanks tons. Appears to be working now... > > -B > > --- > RSC > BDC > > > -----Original Message----- > > From: Brede Johansen [mailto:[EMAIL PROTECTED] > > Sent: Thursday, September 07, 2006 1:46 AM > > To: Brad Colbert; Robert Osfield > > Subject: Re: [osg-users] OSGDEM database is black where alpha < 1.0 > > > > Brad and Robert, > > > > The .osg model from the screenshots didn't enable blend mode. By > > adding the line "GL_BLEND ON" OSG 1.2 RC displayed like OSG 1.0. So > > it seems to me like the OSG 1.0 release had blend mode enabled by > > default! > > > > This revelals a bug/missing-feature in the OpenFlight loader. The > > loader only checks if the image of texture unit 0 is translucent. > > Information for texture unit 0 is inside the Face record but > > additional textures comes in a separat mulitexture record missing this > > test. > > > > PS. The correct way to enable blend mode in Creator is to set the Face > > drawing attribute to "Fixed With Alpha" and not rely on the Flight > > loader detecting translucent images. Ref. loader option > > "noTextureAlphaForTransparancyBinning". > > > > Regards, > > Brede > > > > > > On 9/7/06, Brede Johansen <[EMAIL PROTECTED]> wrote: > > > Hi Brad and Robert, > > > > > > Something happened in OSG after the 1.0 release. My best guess at the > > > moment is a change in the default stateset. Never had the time to > > > look into it. > > > > > > I'm a bit uncertain about the origin of the textures in the attached > > > test model so this mail goes only to you. > > > > > > > > > Regards, > > > Brede > > > > > > > > > > > > On 9/6/06, Brad Colbert <[EMAIL PROTECTED]> wrote: > > > > Hi Folks, > > > > > > > > Has anyone else out there run into this problem: > > > > > > > > I am generating an .osga database using OSGDEM. The imagery has > four > > > > components (Red, Green, Blue, Alpha) but my database is black > wherever > > > > the alpha is < 1.0. What would cause this? Is it texture > > compression, > > > > which I hope isn't being used? > > > > > > > > When I use a shader to just show the alpha layer, it's all white. > > > > Showing just one of the color layers shows that they are black where > > the > > > > imagery has alphas of < 0.0. > > > > > > > > When I use the same imagery to build a database in OSG 1.0 I get the > > > > alpha values, but loading that database into an application I have > > built > > > > against CVS OSG, I get the same black behavior. Strange. Any > ideas? > > > > > > > > -B > > > > > > > > --- > > > > Renaissance Sciences Corporation > > > > O/M: 480 290-3997 > > > > F: 425 675-8044 > > > > > > > > _______________________________________________ > > > > osg-users mailing list > > > > osg-users@openscenegraph.net > > > > http://openscenegraph.net/mailman/listinfo/osg-users > > > > http://www.openscenegraph.org/ > > > > > > > > > > > > > _______________________________________________ osg-users mailing list osg-users@openscenegraph.net http://openscenegraph.net/mailman/listinfo/osg-users http://www.openscenegraph.org/
