3e180a121a
Add the settle loop a swap triggers: resolve(board) runs rounds of
detect -> clear -> collapse -> refill until a round finds no match,
returning a Cascade { depth, cleared } so P3 can read per-round
cleared-cell counts and the combo-driving depth. resolve_step exposes
one round. Termination follows from eventually reaching no-match; no
artificial round cap.
tests/cascade.sx: a fixed-seed hand-crafted board where clearing the
initial BBB lets gravity pack col 0 into a fresh vertical RRR, so the
loop chains two rounds; snapshots each per-round board and the final
depth, asserts the final board is stable and that public resolve
reproduces the manual loop, plus a depth-0 control on an unchanged
checkerboard. Locked in tests/expected/cascade.{stdout,exit}.
31 lines
360 B
Plaintext
31 lines
360 B
Plaintext
== cascade (resolution loop) ==
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start:
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OGOGOGOG
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GOGOGOGO
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RGOGOGOG
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BBBOGOGO
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RGOGOGOG
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ROGOGOGO
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OGOGOGOG
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GOGOGOGO
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round 1: cleared 3 cells
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RBRGOGOG
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OGOOGOGO
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GOGGOGOG
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RGOOGOGO
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RGOGOGOG
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ROGOGOGO
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OGOGOGOG
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GOGOGOGO
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round 2: cleared 3 cells
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RBRGOGOG
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PGOOGOGO
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YOGGOGOG
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RGOOGOGO
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OGOGOGOG
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GOGOGOGO
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OGOGOGOG
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GOGOGOGO
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cascade depth 2
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ok: cascade resolves to a stable board
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