There are several places where a temporary change of light mode is needed, all these made this change in the global level struct. Now the change is only local to the active draw info.
- upload only the dynamic AABB subtree using glBufferSubData
- change internal raytracing stack limit from 16 to 32
- update shadowmap AABB tree after R_SetupFrame for proper frame interpolation
Rename ColorAdd to AddColor
Add AddColor to FRenderState
Tweak SpecialColors array in ZScript to include the additive color
Add uAddColor to the shader compiler
Add uAddColor to the texel
As a bonus this already fixes several bugs caused by the botched texture scaling implementation the original texture manager came with.
System cursors are currently disabled because they rely on functionality that needs to be moved to different classes.
The main reason is to unify the portal hierarchy again. The split into a hardware independent and a hardware dependent part turned out to be unnecessary and complicated matters.
Another issue was that the new stencil setup code was having a few subtle problems, so this recreates the original ones with indirect API calls.
* Colors can npw be defined per sidedef, not only per sector.
* Gradients can be selectively disabled or vertically flipped per wall tier.
* Gradients can be clamped to their respective tier, i.e top and bottom of the tier, not the front sector defines where it starts.
The per-wall colors are implemented for hardware and softpoly renderer only, but not for the classic software renderer, because its code is far too scattered to do this efficiently.
An exception is made for the sprite drawer which needs to call this in the worker thread on some occasions for as-yet unprocessed sectors.
This case may not alter the cache to avoid having to add thread synchronization to it.
The main reason for this change is that pointers to such manipulated sectors can now be considered static in the renderer.
Due to them being short lived local buffers it was not possible to carry them along with the render data for information retrieval.
This is not flexible enough. There was already one place where this was not supposed to go through the render state.
The new interface allows more general use of the contained buffer objects.
