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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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test/t_slope_belt_art.js
+3 -3
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@@ -10,10 +10,10 @@ for (const code of ['BP_BELT_UP', 'BP_BELT_DOWN', 'BP_FILTER_UP', 'BP_FILTER_DOW
run(`
mat.fill(EMPTY); part.fill(0); blockP.fill(0); blockV.fill(0);
var artCode = ${code}, artGrade = beltGrade(artCode), artB = 12 * BW + 12;
for (let k = -2; k <= 2; k++) placeBlock(artCode, 1, 12 + k, 12 + artGrade * k, true);
for (let k = -2; k <= 2; k++) placeBlock(artCode, artGrade > 0 ? 1 : 0, 12 + k, 12 + artGrade * k, true);
prepareSlopeBelts(0, 0, W, H);
`);
check(`${code}: diagonal neighbours continue the band`, run('(slopeBeltJoins[artB] & 12) === 12'));
check(`${code}: downhill diagonal neighbours continue the band`, run('(slopeBeltJoins[artB] & 12) === 12'));
check(`${code}: corner seals use the same band`, run(`(() => {
const i = slopeSeal(artCode, 12, 12);
return i < 0 || slopeBeltAt(i, i % W, (i / W) | 0) >= 0;
@@ -35,7 +35,7 @@ for (const code of ['BP_BELT_UP', 'BP_BELT_DOWN', 'BP_FILTER_UP', 'BP_FILTER_DOW
for (let end = 0; end < 2; end++) {
const side = end ? 1 : -1;
removeBlock(12 + side, 12 + side * artGrade, true);
placeBlock(BP_BELT, 1, 12 + side, 12 + (end ? artGrade > 0 : artGrade < 0), true);
placeBlock(BP_BELT, artGrade > 0 ? 1 : 0, 12 + side, 12 + (end ? artGrade > 0 : artGrade < 0), true);
}
prepareSlopeBelts(0, 0, W, H);
`);