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Falling grains 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 20:11:57 -04:00
co-authored by Claude Opus 5.5
parent f744d786f1
commit 7d1be16094
4 changed files with 30 additions and 13 deletions
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test/t_light.js
+15 -7
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@@ -44,9 +44,9 @@ for (const mode of ['full', 'fast']) {
}
check('lighting leaves the simulation roof unchanged', run('simRoof.every((y, x) => roofY[x] === y) && roofY[80] === 80'));
for (const material of ['STONE', 'SAND', 'WATER']) {
run(`setCell(96 * W + 80, ${material}, AMB[96], F_NAT); updateRoof(); computeLight();`);
run(`setCell(96 * W + 80, ${material}, AMB[96], F_NAT); setCell(97 * W + 80, STONE, AMB[97], F_NAT); updateRoof(); computeLight();`);
check(`${material} above the view still blocks daylight`, run('lightAt(R.lr, 80, 144) < 0.95'));
run('setCell(96 * W + 80, EMPTY, AMB[96], 0);');
run('setCell(96 * W + 80, EMPTY, AMB[96], 0); setCell(97 * W + 80, EMPTY, AMB[97], 0);');
}
run('updateRoof(); computeLight();');
check('removing an obstruction restores daylight', run('lightAt(R.lr, 80, 144) === 1'));
@@ -70,14 +70,17 @@ run(`
setCell(80 * W + x, STONE, AMB[80], F_NAT);
for (let y = 77; y < 80; y++) setCell(y * W + x, SAND, AMB[y], 0);
}
for (let y = 40; y <= 76; y += 2) setCell(y * W + 152, SAND, AMB[y], 0);
updateRoof();
`);
for (const mode of ['full', 'fast']) {
run(`SET.lighting = '${mode}'; computeLight();`);
for (const channel of ['lr', 'lg', 'lb']) {
const [belt, open, stone] = run(`[lightAt(R.${channel}, 80, 84), lightAt(R.${channel}, 152, 84), lightAt(R.${channel}, 232, 84)]`);
const [belt, open, stone] = run(`[lightAt(R.${channel}, 80, 84), lightAt(R.${channel}, 160, 84), lightAt(R.${channel}, 232, 84)]`);
check(`${mode} ${channel}: a loaded belt leaves daylight below it`, Math.abs(belt - open) < 1e-6, `${belt} / ${open}`);
check(`${mode} ${channel}: sand on natural stone still shades below`, stone < open * 0.95, `${stone} / ${open}`);
const [streamGround, openGround] = run(`[lightAt(R.${channel}, 152, 160), lightAt(R.${channel}, 160, 160)]`);
check(`${mode} ${channel}: a falling stream leaves ground as bright as open sky`, Math.abs(streamGround - openGround) < 1e-6, `${streamGround} / ${openGround}`);
}
run('setCell(76 * W + 80, WATER, AMB[76], 0); updateRoof(); computeLight();');
const a = run('lightAt(R.latt, 80, 76)');
@@ -89,19 +92,24 @@ for (const [name, support, depth, gap, expected] of [
['right belt', 'mat[i] = BELTR', 12, '', true],
['filter', 'part[i] = P_FILTER', 12, '', true],
['deep heap', 'mat[i] = BELTR', 13, '', false],
['air gap', 'mat[i] = BELTR', 3, 'EMPTY', false],
['gas gap', 'mat[i] = BELTR', 3, 'STEAM', false],
['air gap', 'mat[i] = BELTR', 3, 'EMPTY', true],
['gas gap', 'mat[i] = BELTR', 3, 'STEAM', true],
['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],
]) {
run(`
for (let y = 40; y <= 53; y++) { const i = y * W + 300; mat[i] = SAND; part[i] = 0; flags[i] = 0; }
{ const i = (40 + ${depth}) * W + 300; mat[i] = EMPTY; mat[i + W] = BELTR; ${support}; }
${gap ? `mat[41 * W + 300] = ${gap};` : ''}
`);
check(`${name}: belt load detection`, run('onBeltForLight(40 * W + 300)') === expected);
check(`${name}: loose cell detection`, run('looseForLight(40 * W + 300)') === expected);
}
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('belt load detection stops at the world bottom', run('!onBeltForLight((H - 1) * W + 300)'));
check('loose cell detection stops at the world bottom', run('!looseForLight((H - 1) * W + 300)'));
done();