I've uploaded level solution for J, J & BUM Fortress Chapter boss-battle arena (Ganderoleg C3 LBossB V1) to SkyDrive.
The one problematic thing about this level is the Boss (spider-like monster). The monster will have to be bigger then one regular lane but, because of the towers at the middle of the level, his boundary box will have to be lane-wide in order for him to move freely to the left or right. This means that his boundary box would have to be unsymmetrical to his geometry.
I am not very good at programming so I don't know if this could easily be solved by code, but my solution would be to fake the turn by just animating it: monster moves -X, stops, monster displays turn animation, monster moves +X. There will be no actual movement while the model turns around, only the turning animation.
Also I coded a small action that triggers the battle music ones the player enters the arena. The code itself will naturally have to be replaced with more advanced solution but this is a small example of how the atmospheric/battle music switching could look like. The music changes from Ivan's atmospheric music theme (Dream.ogg) to battle-music theme (Beholder.ogg).
Once I finish last two levels from the J,J&BUM chapter 3 I will click together another non-code level (Ganderoleg C3 NonCoded V2) with last non-coded entities from the chapter 3.
but this is a small example of how the atmospheric/battle music switching could look like. The music changes from Ivan's atmospheric music theme (Dream.ogg) to battle-music theme (Beholder.ogg).
