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Diagonal screw tubes, laid by a 45° drag (t35)

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- Tubes run in eight directions: a drag at about 45° lays a diagonal run, R cycles all eight.
- Diagonal runs carry grains at the straight rate (120 grains/s), join straight tubes and belts,
  keep grains in at the corners, pass water, and carry bars level.
- New part ids 11-14 (saved ids are never renumbered); tube checks use an IS_TUBE table.
- New test/t_diag_tubes.js (85 checks).

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
This commit is contained in:
44r0n7
2026-10-25 17:37:30 -04:00
co-authored by Claude Opus 5.5
parent 381019b7aa
commit 8087c28cb5
26 changed files with 348 additions and 65 deletions
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src/render/world.js
+9 -7
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@@ -3,7 +3,8 @@ function fogColor(c, k) { return (c & 0xff000000) | (((c >>> 16 & 255) * k) << 1
// drawWorld: the per-grain pixel buffer (pixel look), also the input of the smooth look.
// ---------- World pixels ----------
// smooth-look class of a screw tube cell by direction: 9 up, 10 right, 11 down, 12 left
const TUBE_CLASS = new Uint8Array(9); TUBE_CLASS[1] = 9; TUBE_CLASS[4] = 10; TUBE_CLASS[2] = 11; TUBE_CLASS[3] = 12;
const TUBE_CLASS = new Uint8Array(15); TUBE_CLASS[1] = 9; TUBE_CLASS[4] = 10; TUBE_CLASS[2] = 11; TUBE_CLASS[3] = 12;
for (let p = P_TUR; p <= P_TUL; p++) TUBE_CLASS[p] = 19 + p - P_TUR;
function drawWorld() {
const bw = R.bw, bh = R.bh, px = R.px;
R.vx0 = Math.floor(R.camX); R.vy0 = Math.floor(R.camY);
@@ -155,13 +156,14 @@ function drawWorld() {
}
// field parts drawn over contents
const p = part[i];
if (p && sm && (p <= P_TR || p === P_FILTER)) { if (m === EMPTY || PH[m] === PH_GAS) { r = 0; g = 0; b = 0; } else { r = Math.max(1, r); } }
if (p && sm && (IS_TUBE[p] || p === P_FILTER)) { if (m === EMPTY || PH[m] === PH_GAS) { r = 0; g = 0; b = 0; } else { r = Math.max(1, r); } }
else if (p) {
if (p <= P_TR) {
if (IS_TUBE[p]) {
const on = netSat(i) > 0;
const vert = p === P_TU || p === P_TD;
const axis = vert ? y : x, across = vert ? x & 3 : y & 3;
const dir = (p === P_TU || p === P_TL) ? 1 : -1;
const vert = p === P_TU || p === P_TD, diagonal = TDX[p] && TDY[p];
const axis = diagonal ? x * TDX[p] + y * TDY[p] : vert ? y : x;
const across = diagonal ? ((x * -TDY[p] + y * TDX[p]) & 3) : vert ? x & 3 : y & 3;
const dir = diagonal ? -1 : (p === P_TU || p === P_TL) ? 1 : -1;
if (across === 0 || across === 3) { // copper casing on the two long sides; its load shows through
if (m === EMPTY) { r = 150; g = 96; b = 64; } else { r = r * 0.72 + 44; g = g * 0.72 + 26; b = b * 0.72 + 14; }
if ((axis & 3) === 0) { r -= 24; g -= 18; b -= 12; }
@@ -217,7 +219,7 @@ function drawWorld() {
// 4 built piece (drawn crisp), 5 smoke and flame, 6 built wall block (drawn as a tile)
let cl = 0;
const pt = p === P_PIPE && !pipeBodyCell(x, y) ? 0 : p; // the open parts of a pipe block show what is in them
if (pt >= P_TU && pt <= P_TR) cl = TUBE_CLASS[pt];
if (IS_TUBE[pt]) cl = TUBE_CLASS[pt];
else if (p === P_FILTER) {
// filter: 13 carries left, 14 right; the tree buffer carries its colour tag (first material) and mode
const fb = (y >> 2) * BW + (x >> 2), fc = filterCfg.get(fb), fm = fc && fc.m.length ? fc.m[0] : 0;