platformer: finish Phase E — the goo serpent (L6) + the serpent generalized#63
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…alized Completes asset-expansion Phase E (snakes & the slither beat): - Generalize the L4 lava serpent into a reusable pfMakeSerpent / pfTickSerpent (params: pL, pR, pSurfY, pPeakY, pFrame, pAnim), driving both the snakeLava and snakeSlime skins from one code path. Single- instance (one serpent per level, reset on each build); gLSerpLavaY -> gLSerpSurfY. L4 now calls pfMakeSerpent ... "snakeLava.png","snakelava". - New slime-pool beat on L6 (CAVERN DEPTHS): PIT2's spike chasm becomes a toxic GOO POOL (new pfMakeSlimePool - a green goo rect over a knockback hurt sensor, the slime-biome twin of pfMakeLava) where a rearing snakeSlime serpent rises out of the goo, arcs across and sinks back in, peaking at ~jump-arc height (y460) over the centre. Time the double-jump for when it has sunk; a mistimed leap or a slip into the goo is a recoverable knockback. Serpent created before the goo so the goo draws over its submerged body. Self-gates on gSpooksOK (a plain double-jump gap without the spooks sheet). - Two more plain snake placements for variety: a meadow snake on L1 and a sand snake on L5, each on a verified-clear ground stretch (self-reverses at its band ends). - Tie up the loose end: document the forward-constant-reference trap as CLAUDE.md gotcha 29 (OXT leaves a constant referenced before its declaration unresolved - it silently zeroes the expression; that was the L4 serpent's "never rose" bug). Confirmed in OXT. - audit-platformer.py tracks pfMakeSlimePool as a lava-like hazard. Static gates clean; audit-platformer 0 findings across 7 levels. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01X92APxUJUMue3bAzXiX9V2
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What
Completes asset-expansion Phase E (snakes & the slither beat), building on the L4 lava serpent that just merged in #62. All example-side — no Kit change, no harness bump.
The serpent, generalized
The L4 lava-serpent maker becomes a reusable
pfMakeSerpent pL,pR,pSurfY,pPeakY,pFrame,pAnim(tickpfTickSerpent), driving both thesnakeLavaandsnakeSlimeskins from one code path. Single-instance (one serpent per level, reset on each build);gLSerpLavaY→gLSerpSurfY. L4 now calls it with the lava skin.New slime-pool beat (L6, CAVERN DEPTHS)
PIT2's spike chasm becomes a toxic GOO POOL — new
pfMakeSlimePool, a green goo rect over a knockback hurt sensor (the slime-biome twin ofpfMakeLava). A rearingsnakeSlimeserpent rises out of the goo, arcs across and sinks back in, peaking at ~jump-arc height (y460) over the centre: time your double-jump for when it has sunk. A mistimed leap or a slip into the goo is a recoverable knockback (the saw rule). The serpent is created before the goo so the goo draws over its submerged body (it reads as rising out of the goo). Self-gates ongSpooksOK— without the spooks sheet it's a plain double-jump gap.More variety
Two more plain snake placements on verified-clear ground stretches — a meadow snake on L1 and a sand snake on L5 (each self-reverses at its band ends).
Loose end tied up
Documented the forward-constant-reference trap as CLAUDE.md gotcha 29: OXT leaves a
constantreferenced before its declaration unresolved, silently zeroing the expression — that was the L4 serpent's "never rose" bug (sin(kPI * tP)withkPIdeclared ~900 lines later). Confirmed in OXT.Verification
check-livecodescript.py— PASS (no smart quotes, handlers/blocks balanced, embedded Kit in sync)audit-platformer.py— 0 findings across all 7 levels (now also trackspfMakeSlimePoolas a hazard)Needs the OXT pass — that the L6 goo serpent rises/sinks and reads in the cavern, the timing of the goo-pit double-jump feels fair, and the new L1/L5 snakes sit right (placement + facing are statically unverifiable, gotcha 26).
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Generated by Claude Code