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Pinball: close the left outlane, seal the shooter lane after launch

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- The ball kept escaping unsaveably down the far left. The left outlane
  is now closed by a solid deflector from the wall to the left flipper
  pivot, so a ball down that side is always fed onto the flipper. Only
  the centre gap between the flipper tips is a free drain now.
- The shooter-lane divider runs the full height (y 120–474) so a ball in
  play can't fall back into the lane after launch ("close it after
  launch"). Plus a safety: a slow ball that does end up deep in the lane
  re-arms the plunger. Right wall extends down as the return chute.

Sim: ball stays within x≥60, drains cleanly through the centre, game
completes; no NaN.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_017Ve7HLspzeG2xDPtJQ8vmu
This commit is contained in:
chris 2026-09-10 14:52:02 -04:00
parent f957a93c36
commit 9981c48bf6
1 changed files with 28 additions and 19 deletions
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47
src/lib/pinball.js
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@ -44,22 +44,27 @@ const TABLE = {
{ a: [42, 20], b: [250, 20] }, // top
{ a: [250, 20], b: [300, 56] }, // top-right corner
{ a: [300, 56], b: [306, 96] },
{ a: [306, 96], b: [306, 474] }, // right wall / shooter-lane outer
{ a: [288, 474], b: [288, 236] }, // shooter-lane divider
{ a: [306, 96], b: [306, 548] }, // right wall / shooter-lane outer (continues down as the return chute)
{ a: [288, 474], b: [288, 120] }, // shooter-lane divider (tall — the ball can't fall back in after launch)
{ a: [288, 474], b: [306, 474] }, // shooter-lane floor
{ a: [14, 60], b: [14, 452] }, // left wall
{ a: [14, 452], b: [40, 478] }, // left lower guide (rounds toward the flipper)
{ a: [288, 474], b: [264, 492] }, // right lower guide
{ a: [14, 60], b: [14, 448] }, // left wall
// left slingshot — triangle above the flipper's outer half
{ a: [88, 442], b: [104, 486], e: PHYS.slingE, k: PHYS.slingKick }, // kicking face
{ a: [88, 442], b: [58, 486] }, // outer face
{ a: [58, 486], b: [104, 486] }, // bottom
// left outlane is CLOSED: a solid deflector from the wall to the flipper
// pivot, so a ball down the left is always fed onto the left flipper.
{ a: [14, 448], b: [50, 470] },
{ a: [50, 470], b: [86, 504] },
// right slingshot
{ a: [232, 442], b: [216, 486], e: PHYS.slingE, k: PHYS.slingKick },
{ a: [232, 442], b: [262, 486] },
{ a: [216, 486], b: [262, 486] },
// right side stays open below the divider so a ball can trickle to the
// return; a short guide nudges it that way.
{ a: [288, 474], b: [262, 494] },
// slingshots (triangles above each flipper's outer half)
{ a: [96, 434], b: [110, 476], e: PHYS.slingE, k: PHYS.slingKick }, // L kicking face
{ a: [96, 434], b: [76, 476] },
{ a: [76, 476], b: [110, 476] },
{ a: [230, 434], b: [214, 476], e: PHYS.slingE, k: PHYS.slingKick }, // R kicking face
{ a: [230, 434], b: [250, 476] },
{ a: [214, 476], b: [250, 476] },
],
bumpers: [
{ x: 80, y: 132, r: 15 },
@ -210,6 +215,10 @@ export function createPinball(canvas, cbs = {}) {
b.vx *= 0.6;
b.x += (TABLE.laneX - b.x) * 0.35;
}
// Re-arm the plunger if a ball ends up sitting in the lane again.
if (!b.inLane && !b.launching && b.x > 292 && b.y > 430 && Math.hypot(b.vx, b.vy) < 60) {
b.inLane = true;
}
// Gate kick: once the launched ball clears the divider, fling it left
// into the playfield (a straight-up launch has nowhere else to go).
if (b.launching && b.y < 236) {
@ -472,15 +481,15 @@ export function createPinball(canvas, cbs = {}) {
};
ctx.fillStyle = accentA(0.22);
tri([
[88, 442],
[104, 486],
[58, 486],
[96, 434],
[110, 476],
[76, 476],
]);
ctx.fill();
tri([
[232, 442],
[216, 486],
[262, 486],
[230, 434],
[214, 476],
[250, 476],
]);
ctx.fill();