Caelum only works with Cg shaders

[Erik Ogenvik]

Both the foliage (PagedGeometry) and sky (Caelum) system only works with Cg-shaders. Which means that the foliage is disabled, and the sky isn't as good looking as it could be when running it on a system without support. Since we like FOSS and want our client distributed on many distros, and Cg isn't FOSS (how nice would it be if it had been?) we need to provide GLSL fallbacks. One possibility is just to run it through Cg with a GLSL backend and save the shader.

[Alexey Torkhov (atorkhov)]

PagedGeometry makes its shaders in runtime. Nothing hard there, it could be rewritten with #ifdefs. But it may require modifying the grass loader even more. May be make custom grass loader (with different class name) to simplify the updating?

P.S. As a thought: we can still support DirectX by compiling GLSL shaders with Cg (-oglsl option). Not sure about how it will work through.

[Crestez Dan Leonard (cdleonard)]

This is probably relevant: http://www.ogre3d.org/addonforums/viewtopic.php?f=21&t=10487&p=60344

[Erik Ogenvik (erik-ogenvik)]

That is interesting indeed. You mentioned earlier that you were interested in looking to upgrade caelum in Ember. I've now fixed the issues with ATI cards, so you can run it without getting any artifacts.

[Erik Ogenvik (erik-ogenvik)]

Updated the title to reflect that this now only concerns Caelum since the Paged Geometry has been updated with support for GLSL shaders.