Boxes, ramps and the lock

Boxes, ramps and the lock

Eight objects per game, all axis-aligned rectangles, all opaque to vision and all solid to movement:

Every object carries pos (integer px, top-left), kind, axis, lockedBy in {none, hiders, seekers} and heldBy (slot index or -1). All of it is in gameHash.

The deal is seeded, not authored

The room's objectSpawns are shuffled by the episode's setupRng and the first crates crate-capable, panels panel-capable and ramps ramp-capable candidates are taken in that fixed order, each object taking its candidate's axis. The same deal is used for both games of the episode — the two trios play the same room and the same furniture, which is what makes the swap a fair comparison — and it is pinned into the replay config.

The draw happens before any seat connects, so nothing a seat does can shift it. Neither can the room: the episode's room is pool[seed mod 3].

A candidate is skipped if the object would overlap a static wall, another object, a spawn pad, or a keep-clear disc.

Grab (button C, bit 7)

Hold C to grab, release to drop. On a fresh press, a segment is probed from the cog's centre along its aim, from the body edge out to grabReach = 30 px. The FIRST object the segment meets binds — nothing beyond it. An object locked by the OTHER team refuses and emits lock_refused; an object already held by another cog refuses. Ties (two cogs in the same tick) go to the lower slot; the loser gets a grab_failed.

A held object is dropped when C is released, when the cog has been dead stopped against a refusal for grabBreakTicks = 24 ticks, when the phase changes, or when the game ends.

Push

A holder moves at carrySpeedPct = 55 % of normal speed, and its held object translates rigidly with it. The move commits only if, after it, the object's rectangle overlaps no static wall, no other object, no cog other than the holder, and no keep-clear disc; otherwise neither moves this tick, the velocity on the blocked axis is zeroed, and pushBlockedTicks counts it. The starter's per-axis slide is applied to the PAIR, so a crate runs along a wall instead of sticking to it.

Keep-clear discs

No object may be moved to within keepClearPx = 96 px of a seeker pad. Without this a hider trio can wall the seekers in during prep and win 1000 permille with no game played; with it, sealing a fort is legal and sealing the door the seekers come out of is not. The refusal is the ordinary push refusal, so it degrades into "the crate stops here".

Lock (button A)

A toggles the lock on the held object, else on the object nearest the cog's centre within lockReach = 30 px of its rectangle.

• lockedBy == none -> lockedBy = your team, lock event.
• lockedBy == your team -> lockedBy = none, unlock event.
• lockedBy == the other team -> refused, lock_refused event.

Either way lockCooldown = 24 ticks. Locking is the whole game: an unlocked wall is a wall for ten seconds, a locked wall is a wall for the rest of the hunt. A locked object is still solid and still opaque to both teams.

Vault

A cog that holds nothing, whose centre is inside a ramp's rectangle, whose velocity along the ramp axis toward its head is at least MaxSpeed div 2, and for which the first blocking span beyond the head is at most vaultSpanPx = 112 px thick, goes airborne: vaultTicks = 10 ticks at 5 px/tick (50 px in all), ignoring wall and object collisions. On the last airborne tick it lands at the first clear position along the axis; if none is clear it is refunded to the ramp's foot (vault_failed).

While airborne a cog cannot grab or lock, and it is visible over the furniture: visibility of an airborne target is tested against the STATIC WALL MASK only, because its head is above the crates. Vaulting is how you get in; being seen doing it is what it costs.

The sealed-fort scan

At every turn boundary and at the release tick, a breadth-first fill runs over the 8 px fog grid from every seeker's cell, blocked by static walls and by objects the hiders have locked. Unlocked objects are passable — a seeker can shove them. Every hider the fill does not reach is sealed, and sealedTicks accumulates the hunt ticks it spent that way.

sealed is measured, never scored. A sealed fort that nobody can see into is already winning on the exposure counter; paying twice for it would break the exact zero sum the league ranks on.