[Vatsal2005]

What and why

Tap J or gamepad X/Square for alternating eight-frame chair sweeps, each ending in two recoil frames. Only the inspected A04/B03 contact poses enable the short hitbox, with one attempt per target per swing. Accepted hits add a 60ms stage hit-stop, a small spark, hit sound and target knockback. A single queued tap keeps the return swing responsive; damage, death and climbing cancel it. The game uses the approved atlas without scaling its poses.

Issue

Closes #39

Refs #50

Stack

• [12/16] feat: add alternating chair sweeps and contact hits #137 [12/12] feat: add alternating chair sweeps and contact hits ← this PR

• [11/16] feat: add health damage and checkpoint respawn #135 [11/12] feat: add health damage and checkpoint respawn

• [10/16] feat: switch locomotion through authored bridge clips #132 [10/12] feat: switch locomotion through authored bridge clips

• [9/16] feat: follow the hero with directional camera lead #131 [9/12] feat: follow the hero with directional camera lead

• [8/16] feat: add one-way decks and ladder climbing #126 [8/12] feat: add one-way decks and ladder climbing

• [7/16] feat: follow ground slopes and slide downhill #125 [7/12] feat: follow ground slopes and slide downhill

• [6/16] feat: add variable jumps and landing poses #123 [6/12] feat: add variable jumps and landing poses

• [5/16] feat: add weighted walking and running #122 [5/12] feat: add weighted walking and running

• [4/16] feat: load authored collision with a debug overlay #120 [4/12] feat: load authored collision with a debug overlay

• [3/16] feat: load exported stages and sprite atlases #116 [3/12] feat: load exported stages and sprite atlases

• [2/16] ci: check the game with node 22 on pull requests #111 [2/12] ci: check the game with node 22 on pull requests

• [1/4] chore(shared): scaffold the phaser game runtime #94 [1/12] chore(shared): scaffold the phaser game runtime — merged

Base: feature/42-health-and-respawn. Human merges bottom up; retarget the next PR to main and merge origin/main into every open branch, never rebase.

Acceptance criteria

• Alternate sweep A/B and finish each with the two-frame recoil

• Contact-only hitboxes; 60ms hit-stop, spark and target knockback

• Light impact with the supplied recoil poses

Verification

• Node 22: npm run typecheck, npm test (99 tests), npm run build; includes main integration at e8577ab

• py -3.13 scripts/check_docs.py — 703 files

• git diff --cached --check

• Tests cover exact pose windows, eight-plus-two timing, queued alternation, both directions, one attempt per target and exactly 60ms pause across partial frames

• Browser: stationary rover test target records A then B hits, followed by a third hit from the opposite side; target is pushed in the strike direction; F2 shows the contact box and hit-stop; no console errors

• Browser: a 5ms keyboard tap is retained through Phaser's release flag

• Physical gamepad and Vercel preview: Vatsal2005 needs Vercel project access to create deployments

Integration and art timing

Stage.chair.register(target) accepts damageable actors; real rover AI follows in #45. Stage.playerActor exposes the player and Stage.chair.enabled gates the weapon for lane A's pickup beat in #50. Engine testing enables the chair in Rusty Creek and leaves it disabled in the Garden.

The approved B contact pose points the opposite way from A. Runtime mirrors B relative to the locked strike direction so both hit the frontal target; recoil uses its own right-facing pose. Contact indices were checked against the actual exported frames. A development-only combat-test query adds the stationary rover fixture and hit counter; it never appears in production.

Reference comparison

Plan and measurements: docs/02 — chair contact.

Reproduce: python scripts/compare.py lineup chair-side:sweep-a-04 chair-side:sweep-b-03 enemy-rover:idle-00 --out game/verification/39-chair-contact-compare.png.

The reference comparison found the original 50px envelope too long. Contact now reaches 8–33px forward, 23–58px above the foot pivot. The fixture uses its measured 31×25px bounds, starting 38.5px ahead so the second sweep still overlaps after 8px of fixture knockback. Exact bounds, both directions and rejection beyond reach are tested.

Browser after correction: two stationary A/B strikes, then a third left-facing strike connect; the return contact shows 60ms hit-stop. A 5ms tap remains responsive. Screenshots shown in chat, with originals in ignored tmp/verification/39-measured-two-hits.png and 39-measured-left-hit.png. No browser console errors. The comparison is committed as review evidence; source art is unchanged.

[vercel]

@Vatsal2005 must be a member of the arudaev's projects team on Vercel to deploy.
- Click here to add @Vatsal2005 to the team.
- If you initiated this build, request access.
- If you're already a member of the arudaev's projects team, make sure that your Vercel account is connected to your GitHub account.

Learn more about collaboration on Vercel and other options here.

[vercel]

The latest updates on your projects. Learn more about Vercel for GitHub.

Project	Deployment	Actions	Updated
wincs	Error		Oct 24, 2026 12:32am UTC