As we don't reconfigure all shaders without shadows when we disable them
indoors (as it'd probably add a hitch to transitioning in and out) we
need to set up dummy state so the shaders don't do anything illegal.
This hadn't had symptoms for most objects as when indoors, nearly
everything would be drawn first in one of the water RTTs, which had
dummy state to disable shadows already. This wasn't true of the water
plane itself, though, yet somehow it took until just now for anyone to
report that.
This resolves vtastek's issue where the water would be invisible indoors
Previously we always discarded shadow map fragments if the alpha channel of the output would have been low, but there were some (modded) assets that have non-one alpha but have testing or blending disabled so end up opaque anyway. This lets the shadows of those objects match.
/home/elsid/dev/openmw/components/sceneutil/mwshadowtechnique.cpp:3127:9: warning: Call to virtual function during construction [clang-analyzer-optin.cplusplus.VirtualCall]
addAnotherShadowMap();
^
/home/elsid/dev/openmw/components/sceneutil/mwshadowtechnique.cpp:3094:5: note: Loop condition is true. Entering loop body
for (int i = 0; i < 2; ++i)
^
/home/elsid/dev/openmw/components/sceneutil/mwshadowtechnique.cpp:3094:5: note: Loop condition is true. Entering loop body
/home/elsid/dev/openmw/components/sceneutil/mwshadowtechnique.cpp:3094:5: note: Loop condition is false. Execution continues on line 3102
/home/elsid/dev/openmw/components/sceneutil/mwshadowtechnique.cpp:3126:21: note: Assuming 'i' is < 'numberOfShadowMapsPerLight'
for (int i = 0; i < numberOfShadowMapsPerLight; ++i)
^
/home/elsid/dev/openmw/components/sceneutil/mwshadowtechnique.cpp:3126:5: note: Loop condition is true. Entering loop body
for (int i = 0; i < numberOfShadowMapsPerLight; ++i)
^
/home/elsid/dev/openmw/components/sceneutil/mwshadowtechnique.cpp:3127:9: note: This constructor of an object of type 'DebugHUD' has not returned when the virtual method was called
addAnotherShadowMap();
^
/home/elsid/dev/openmw/components/sceneutil/mwshadowtechnique.cpp:3127:9: note: Call to virtual function during construction