renderPrePassMgr.cpp related:
A) shifting .addFeature( MFT_XYZ); calls from ProcessedShaderMaterial::_determineFeatures to ProcessedPrePassMaterial::_determineFeatures
B) mimicking the "// set the XXX if different" entries from RenderMeshMgr::render in RenderPrePassMgr::render
C) fleshing out ProcessedPrePassMaterial::getNumStages() so that it shares a 1:1 correlation with ProcessedShaderMaterial::getNumStages()
D) causing inline void Swizzle<T, mapLength>::ToBuffer( void *destination, const void *source, const dsize_t size ) to silently fail rather than fatally assert if a source or destination buffer is not yet ready to be filled. (support for #customTarget scripted render targets)
Reflections:
A) removing reflectRenderState.disableAdvancedLightingBins(true); entries. this would otherwise early out from prepass and provide no color data whatsoever.
B) removing the fd.features.addFeature( MFT_ForwardShading ); entry forcing all materials to be forward lit when reflected.
C) 2 things best described bluntly as working hacks:
C1) when reflected, a scattersky is rotated PI along it's z then x axis in order to draw properly.
C2) along similar lines, in terraincellmaterial, we shut off culling if it's a prepass material.
Skies: scattersky is given a pair of rotations for reflection purposes, all sky objects are given a z value for depth testing.
I got this from looking at the code from the glew utility 'glewinfo' on my system it reported the following for GL_ARB_geometry_shader4: OK [MISSING]. This lead me to believe that there are two different ways of determining extensions. The first 'OK' seems to refer to the entrypoint existing while the second one seems to refer to the extension being available.
The difference is this:
The first OK comes from : GLEW_ARB_geometry_shader4 the global whereas the second 'MISSING' comes from glewGetExtension("GL_ARB_geometry_shader4"). By replacing the gglHasExtension I got the desired result.
We may want to implement some caching if we want to keep using GLEW perhaps?
Anyway I suggest this merely as a test, I'm not sure if this is a viable long-term solution.
* Explicitly request a GL 3.2 context
* Enable 'experimental' extensions on glew (This appears necessary to get glew to work with explictly set GL versions)
