[arudaev]

Stack: 1 of 2 (creek): base main. Merge bottom-up, only on Alexander's word. [2/2] (#236) replaces the creek stage with the zone (Alexander, 26 Oct).

What and why

#157, stages 2–7: Rusty Creek as a stacked 3 × 3 zone, the rust maze above, the creek path, the drains below. It is grown from one approved chunk, because painting from the blockout failed.

• Start chunk (approved, 25 Oct): the [12/13] art: Rusty Creek as a stacked zone – the concepts #227 concept's level band, cut 1:1. The concept is already at game scale: its railing is about 50 px, roughly 1 m. Painting a flat guide failed four ways:

  • with the style master as the look image, which is the creek itself, it came back as the style master;
  • with the Hidden Garden plate, it came back as the garden;
  • with material swatches, it stitched the swatches into a scene;
  • with no image, it painted a generic harbour.

  Details are in docs/09.

• Growth:

  • the level row grows sideways (grow_stage.py, routes in the zone's boards.json);
  • the maze grows up and the drains grow down (world_paint.py grow), then the seams are joined.

• Feature windows: the piers, the pier ladders, the lit culvert, and a steel stair that makes the drains walkable back.

• Up seams: the first up/down joins moved the railway girder, so the joins now stop above it (--half 150,44). The maze's posts and the tree line were then carried down onto the girder's flange.

• Collision:

  • Level row: measured from the art: the path, the girder deck, the pier ladders, and the culvert door over the drain door.
  • Above and below: traced from their depth keys. A traced climb counts as a ladder only where both ends meet a floor.
  • Drains: the flooded bottom is no-go.

• Kept maze (Alexander's call):

  • Route: its blockout is redrawn from its traced floors and ladders.
  • Repeat: the check fails on rivet pitch along the girder flanges; it's waived in zone.json with that reason (world_gate.py prints WAIVED).

Red lines are floors, yellow boxes ladders, blue boxes water (no-go), magenta boxes the culvert and drain doors.

Issue

Refs #157. Still open in #157: getting the zone into the game ([2/2]), then the per-layer check over purple and white in debug mode.

Verification

• world_gate.py art/zones/rusty-creek: PASS on every check. Two repeat checks are WAIVED.
• rusty_creek_zone.py: every surface reachable and leavable. test_rusty_creek_zone.py checks the committed collision.
• pytest scripts: 172 passed, including the new waiver test. npm test: 358 passed. tsc and check_docs.py are clean.

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