[OGRE-24] Add possibility to control stencil usage from material files!

[paroj]

[reporter="spacegaier", created="Sat, 24 Nov 2012 19:54:16 +0100"]

Original reporter: rride

In a current version there is no possibility to set stencil ops, masks, values etc in material files, this feature is enabled only in compositor files, but stencil can be used not only in post-processing and stencil shadow-related effects.

Sometimes this feature be VERY useful, because it would help to avoid setting stencil values through RenderQueueListener class.

Original Mantis Ticket: http://www.ogre3d.org/mantis/view.php?id=370

[paroj]

[author="scrawl", created="Sun, 22 Sep 2013 20:34:56 +0200"]

Shouldn't be difficult to add, in theory. The main problem is that it will conflict with other stencil uses (compositor stencil operation, stencil shadows).
On the other hand, if we have material stencil, the compositor stencil would be somewhat obsolete since the same thing can then be achieved by changing the compositor's materials. And as it stands, it looks like stencil shadows are going to be removed in Ogre 2.0, which would also make things easier.

[paroj]

implementing this would increase the size of every pass. Given that this only enables very specific use-cases, I think the current approach with Compositors / RenderQueueListener is sufficient.