* Re-add non-player sector damage.
Reimplements SECMF_HURTMONSTERS and SECMF_HARMINAIR.
* Fixed 3D floor handling for sector damage.
Fixes sector damage to either monsters or players not working on (non-)solid 3D floors.
- Added SECMF_HURTMONSTERS, which allows monsters in the flagged sector to be hurt with the same behavior as players (i.e damage leaking).
- Added SECMF_HARMINAIR, which allows players (And monsters with SECMF_HURTMONSTERS) to be hurt when they're inside the sector in general, instead of only when they're walking on it. Replicates the behavior of the DAMAGE_IN_AIR flag that SectorDamage() uses.
- Added NOSECTORDAMAGE, which makes actors with the flag immune to any harmful floors.
* Feature-complete isometric mode fork.
* Dithered transparency condition tweaks.
* Dithered transparency for non-corpse monsters only (and missiles).
* SpectatorCamera vertical shift.
* Including math.h in hw_sprites.cpp to keep visual studio happy (it couldn't find M_SQRT2 definition).
* Defining MY_SQRT2 in hw_sprites.cpp to keep visual studio happy (it couldn't find M_SQRT2 definition).
* Defining MY_SQRT2 in r_utility.cpp also to keep visual studio happy.
* retrigger checks
* Have correct sprite angle-frame face the camera with orthographic projection enabled.
* Dithered Transparency now works properly on 3D floors. Moved that dither-trans flag setting code within hw_bsp.cpp to handle double-processing of linedefs. Added helper functions to FRenderViewpoint class 'bool IsOrtho()' and 'bool IsAllowedOoB()' to clean up checks everywhere in the code.
* Fixed indents. Added bbox property to subsector struct and use it instead of BSP nodes and Clippers (creating a bbox around viewpoint and checking for overlap) in orthographic mode when no fog of war is active. Turns out to be much faster. Though you need really big maps (Winter's Fury MAP01) to see a difference in fps.
* Non-linux checks don't like uint. Changed to unsigned int.
* Small change of a float to camera.zs. Ignore for testing. Should make no difference.
* Update actor.h to remain mergeable
RF2_NOMIPMAP was introduced, so I had to displace RF_ISOMETRICSPRITES to next bit.
The damage done by polyobjects can now be changed by altering the health value of the start spots. A health of 1 (Default) is the default damage of 3, anything above 1 is instant death, and negative health values are the exact damage the polyobject does with every collision with an actor.
