This better matches CC2 behavior and also makes some very common
operations, like grabbing a cell's actor or terrain, way faster.
It also allows me to efficiently implement CC2's layer order when
checking for collisions; thin walls are checked before terrain, and
actors only afterwards. The upshot is that bowling balls no longer
destroy stuff on the other side of a thin wall!
I also did some minor optimizing, mostly by turning loops over an entire
cell's contents into checks for a single layer; Chromium now performs a
bulk test about 30% faster.
Downsides of this change:
- All kinds of stuff may have broken!
- It'll be a little difficult to ever emulate MSCC's curious behavior
when stacking terrain on top of items or other terrain. But not
impossible.
- It'll be far more difficult to emulate buggy Lynx (or maybe it's just
Tile World?) behavior where some combination of cloners and teleports
allow a ton of monsters to accumulate in a few cells. I guess I
wasn't planning on doing that anyway.
- CCLP1 #81 requires pushing blocks off of blue walls, which is
impossible in CC2 but allowed in TW Lynx (unclear if this is a lynx
behavior or a tw bug)
- CCLP1 #89 has a tank start on a recessed wall and drive off of it,
expecting the recessed wall to be left alone, but under CC2 rules it
becomes a wall; such walls are now automatically converted to a new
tile, the "doubly recessed wall", which restores the expected behavior
without changing how recessed walls work in general
- CCLP4 #135 expects pressing a blue button to not affect blue tanks
that are currently in mid-slide
In addition, the behavior of blue buttons now matches the Lynx/Steam
behavior: the press is stored as a flag and queued until the tank is
next able to move.
- Teleporters now connect on the fly, rather than having fixed
connections (important because dynamite can destroy teleporters!)
- If custom connections are present, red and brown buttons ONLY use
those, rather than falling back to CC2 connection rules
- Multiple brown buttons connected to the same trap should now work
correctly
