Hi, On Nov 28, 2009, at 7:16 PM, Tim Moore wrote:
> On 11/28/2009 05:25 AM, Tatsuhiro Nishioka wrote: >> Hi Tim, >> >> As I said to you in IRC, I have a weird transparency problem with the >> shaders enabled. >> Here's the snapshot (helicopter view) with shaders. >> http://macflightgear.sourceforge.net/wp-content/uploads/snapshots/3dclouds-effect-enabled.png >> >> I used both FG/SG @ cvs-head as of yesterday and FG/SG @ Tim's git, but I >> got exactly the same result. >> The cause of this fancy rainbow-ish filter is the alpha calculation in both >> default.vert and model-default.vert. >> >> A "lazy" patch to avoid this issue is available at: >> http://macflightgear.sourceforge.net/wp-content/uploads/patches/shaders-weird-alpha-fix.diff >> >> I don't know if the real problem is in a shader side or C++ side. >> Tim, do you have any hint on this? >> > Pretty bizzare. Obviously turning off alpha altogether isn't a real option. > Is this a new problem since > the 3d clouds went in, or are/were you seeing it without 3d clouds at all? > What version of > OSG are you using? I guess this problem is not that new, but I couldn't see it until you introduced the alpha calculation on .vert files. As a matter of fact, a bit older FG/SG/OSG/data (cvs or svn as of Sep/07/2009) and the latest shaders (all .eff, .vert, .frag, and materials.xml as of Nov/28/2009) gave me the similar result. The rainbow-ish effect shows up on both scenery and ground objects. Only the difference is that the older FG doesn't have a rainbow-ish effect on the aircraft model, while the latest FG/SG & the latest Shader make a rainbow-ish effect on the aircraft model as well. (FYI, I use OSG/svn on Nov/27 for the latest FG/SG.) This rainbow-ish effect shows up with or without 3D clouds on both old and the latest FG, so I guess it has nothing to do with the new 3D cloud shader. Anyway, I'll keep investigating this. Tat > Tim ------------------------------------------------------------------------------ Let Crystal Reports handle the reporting - Free Crystal Reports 2008 30-Day trial. Simplify your report design, integration and deployment - and focus on what you do best, core application coding. Discover what's new with Crystal Reports now. http://p.sf.net/sfu/bobj-july _______________________________________________ Flightgear-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/flightgear-devel
