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Grains resting on anything built cast no shadow (t37)

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Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
This commit is contained in:
44r0n7
2026-10-25 20:21:31 -04:00
co-authored by Claude Opus 5.5
parent 7d1be16094
commit f19facbe5c
4 changed files with 45 additions and 6 deletions
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test/t_light.js
+34 -3
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@@ -97,9 +97,10 @@ for (const [name, support, depth, gap, expected] of [
['12 falling grains', '', 12, '', true],
['13 falling grains', '', 13, '', false],
['natural ledge', 'mat[i] = STONE; flags[i] = F_NAT', 3, '', false],
['wall floor', 'mat[i] = STONE', 3, '', false],
['tube', 'part[i] = P_TR', 3, '', false],
['loaded tube', 'mat[i] = SAND; part[i] = P_TR', 3, '', false],
['deep natural heap', 'mat[i] = SAND; flags[i] = F_NAT', 13, '', false],
['wall floor', 'mat[i] = STONE', 3, '', true],
['tube', 'part[i] = P_TR', 3, '', true],
['loaded tube', 'mat[i] = SAND; part[i] = P_TR', 3, '', true],
]) {
run(`
for (let y = 40; y <= 53; y++) { const i = y * W + 300; mat[i] = SAND; part[i] = 0; flags[i] = 0; }
@@ -112,4 +113,34 @@ run('mat[40 * W + 300] = SAND; mat[41 * W + 300] = EMPTY;');
check('a single grain in mid-air is see-through', run('looseForLight(40 * W + 300)'));
run('mat[(H - 1) * W + 300] = SAND;');
check('loose cell detection stops at the world bottom', run('!looseForLight((H - 1) * W + 300)'));
flatWorld(run, 320, 200, 160);
run(`
bot.lamp = false; stats.refined = 0;
placeBlock(BP_GRIND, 0, 20, 20, true);
for (let bx = 8; bx < 30; bx++) placeBlock(BP_BELT, 1, bx, 36, true);
setCell(79 * W + 80, SAND, AMB[79], 0);
`);
check('sand resting on grinder housing is see-through', run('looseForLight(79 * W + 80)'));
for (const mode of ['full', 'fast']) {
const result = run(`(() => {
SET.lighting = '${mode}';
let mismatches = 0, first = '';
for (let t = 0; t < 180; t++) {
if (t % 4 === 0) setCell(48 * W + 80, SAND, AMB[48], 0);
simTick();
computeLight();
for (const a of [R.lr, R.lg, R.lb]) for (let x = 76; x < 88; x += 2) {
const below = lightAt(a, x, 160), open = lightAt(a, 152, 160);
if (Math.abs(below - open) > 1e-6) {
mismatches++;
if (!first) first = 'tick ' + tick + ', x ' + x + ': ' + below + ' / ' + open;
}
}
}
return { mismatches, first };
})()`);
check(`${mode}: streaming grinder leaves ground in daylight for 180 consecutive ticks`, result.mismatches === 0, result.first || 'no shadow');
}
check('the streaming grinder actually processes its input', run('stats.refined > 0'), run('stats.refined'));
done();