Re: [Flightgear-devel] Rendering passes question

2012-07-19 Thread Renk Thorsten
This is an optimization to avoid running really expensive shaders on geometry that will be hidden from view. The GPU has an early Z capability and won't run a fragment shader if it knows the result will be discarded. But that can't be all that is going on. In this case I'd expect that if I

Re: [Flightgear-devel] Rendering passes question

2012-07-19 Thread Tim Moore
On Thu, Jul 19, 2012 at 1:16 PM, Renk Thorsten thorsten.i.r...@jyu.fi wrote: This is an optimization to avoid running really expensive shaders on geometry that will be hidden from view. The GPU has an early Z capability and won't run a fragment shader if it knows the result will be discarded.

Re: [Flightgear-devel] Rendering passes question

2012-07-19 Thread James Turner
On 19 Jul 2012, at 14:32, Tim Moore wrote: Do we really not run the terrain fragment shader when the terrain is seen through the cockpit floor (my system seems to slow down even though no terrain is seen in the event and the framerate responds to my shader quality settings)? That would

Re: [Flightgear-devel] Rendering passes question

2012-07-19 Thread Renk Thorsten
Which is very unfortunate, since in the common case it would allow a huge amount of tile/terrain pixels to be dumped. Could we use a buffer copying to trick to initialise a stencil plane on the far camera based on the near-camera Z-buffer? I've no idea what the penalty of a z-buffer

[Flightgear-devel] OpenCL

2012-07-19 Thread Stefan Gofferje
Hi, I'm still in the middle of a project but I am having quite some interesting stuff here. There is a strong-crypto subproject which uses FPGAs with OpenCL. I have learned that also the ATI and NVIDIA GPU drivers support OpenCL in addition to their proprietary stuff (CUDA, etc.). During a

Re: [Flightgear-devel] Default materials.xml file (was Re: Hawaii regional textures merge request)

2012-07-19 Thread Stuart Buchanan
On Sat, Jul 7, 2012 at 10:51 PM, Stuart Buchanan wrote: After the release I may also see if we can have the materials.xml file selectable from a dialog and re-loadable from in-sim. FYI, I already have this working and will commit it after the release. This is now committed to next/master, and

[Flightgear-devel] JSBSim bug fix that should be backported to FG 2.8.0

2012-07-19 Thread Bertrand Coconnier
Hi all, Just to let you know that Jon fixed a bug in JSBSim that affected the tank inertia calculations. I think it is worth updating both 2.8.0 and 2.9.0 The fix has been applied on the file src/FDM/JSBSim/models/FGPropulsion.cpp and is available on JSBSim CVS repository. Regards, Bertrand.