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Joins follow the travel direction: the next piece goes right after the end (t67 phase 2b)

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Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
This commit is contained in:
44r0n7
2026-10-27 14:09:28 -04:00
co-authored by Claude Opus 5.5
parent fd35bf334f
commit 45538cc18e
16 changed files with 363 additions and 236 deletions
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src/sim/conveyors.js
+4 -16
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@@ -185,22 +185,10 @@ function straightScrewNext(i, p) {
const dx = SCREW_DX[p], dy = SCREW_DY[p], x = i % W, y = (i / W) | 0;
const xx = x + dx, yy = y + dy, next = yy * W + xx;
if ((xx >> 2) === (x >> 2) && (yy >> 2) === (y >> 2)) return next;
const end = dx + dy > 0 ? 1 : 0;
const q = part[next], nb = (yy >> 2) * BW + (xx >> 2);
if (blockP[nb] && !(SCREW_DX[q] && SCREW_DY[q])) return next;
const join = endJoin(x >> 2, y >> 2, end);
if (join >= 0) {
const target = join >> 1, v = blockV[target];
if (blockP[target] === BP_SCREW && v >= 4) {
if (target === nb) return next;
if (!blockP[nb]) {
const lane = dx ? y & 3 : x & 3;
const tx = target % BW * BS + (join & 1 ? BS - 1 : 0);
return (((target / BW) | 0) * BS + lane) * W + tx;
}
}
}
return SCREW_DX[q] && SCREW_DY[q] ? -1 : next;
const q = part[next];
if (!(SCREW_DX[q] && SCREW_DY[q])) return next;
const join = endJoin(x >> 2, y >> 2, dx + dy > 0 ? 1 : 0);
return join >= 0 && (join >> 1) === (yy >> 2) * BW + (xx >> 2) ? next : -1;
}
// Four lanes cross a block in four beats; only a mutual geometric join can receive them.
function diagonalScrewNext(i, p) {