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Sidewall belt and screen drawing, cheaper cleat checks (t42, t43)

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Far sidewall drawn behind the load with cleat ribs at their physics
positions; sloped screens get a tinted mesh between rails and shake only
when loaded. Powder skips cleat checks outside chunks that have cleats,
and empty slopes let their chunks sleep. Record the screw conveyor and
stall/carry-depth decisions.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
This commit is contained in:
44r0n7
2026-10-26 20:08:21 -04:00
co-authored by Claude Opus 5.5
parent 578b55316b
commit 3ee85429fd
14 changed files with 248 additions and 59 deletions
Download Patch File Download Diff File Expand all files Collapse all files
src/sim/cells.js
+14 -9
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@@ -36,7 +36,12 @@ function move(i, j, x, y, nx, ny) {
// Can a grain of material m (phase ph) enter cell j moving by (dx,dy)?
// 0 = no, 1 = into empty, 2 = by displacing what is there.
function enter(m, ph, j, dx, dy) {
if (occ[j] || (ph === PH_POWDER && !cleatCarrying && cleatCells.length && (cleatMask[j] || (dy > 0 && cleatMask[j - dx - dy * W])))) return 0;
if (ph === PH_POWDER && !cleatCarrying && cleatCells.length && (cleatMask[j] || (dy > 0 && cleatMask[j - dx - dy * W]))) return 0;
return enterFree(m, ph, j, dx, dy);
}
// Powder already knows whether its chunk has barriers; other callers use enter.
function enterFree(m, ph, j, dx, dy) {
if (occ[j]) return 0;
const p = part[j];
if (p !== 0) {
if (IS_SCREW[p]) { if (ph === PH_POWDER && SCREW_DX[p] === -dx && SCREW_DY[p] === -dy) return 0; } // liquids and gases flow through freely
@@ -70,10 +75,10 @@ const SORTP_FUEL = 0.003;
// World generation settles with both at 1 and corner sealing off, so seeds keep the same world.
let LSTEP = 8, LFILM = 4;
let CORNER_SEAL = true;
function powder(i, x, y, m) {
function powder(i, x, y, m, barriers = cleatChunks[(y >> 5) * CW + (x >> 5)]) {
if (y >= H - 1) return;
const b = i + W, barriers = cleatCells.length;
if (enter(m, PH_POWDER, b, 0, 1)) { move(i, b, x, y, x, y + 1); return; }
const b = i + W;
if ((!barriers || (!cleatMask[i] && !cleatMask[b])) && enterFree(m, PH_POWDER, b, 0, 1)) { move(i, b, x, y, x, y + 1); return; }
// a grain at least twice as dense works its way down through a loose pile. Unlit fuel
// packs too tight for that, so a mixed furnace charge stays mixed until the fire gets in.
const t = mat[b];
@@ -86,16 +91,16 @@ function powder(i, x, y, m) {
const b = ((y + 1) >> 2) * BW + (x >> 2);
const d = isSlopeBelt(blockP[b]) ? (blockV[b] & 1 ? 1 : -1) : 0;
if (d && x + d >= 0 && x + d < W && IS_SCREW[part[i + d]]) {
if (enter(m, PH_POWDER, i + d, d, 0)) move(i, i + d, x, y, x + d, y);
if ((!barriers || !cleatMask[i + d]) && enterFree(m, PH_POWDER, i + d, d, 0)) move(i, i + d, x, y, x + d, y);
return;
}
}
if (rnd() < STICK[m]) {
const d = (RS & 2) ? 1 : -1;
let nx = x + d;
if (nx >= 0 && nx < W && (!CORNER_SEAL || (PH[mat[b]] !== PH_SOLID && (!barriers || !cleatMask[b])) || (PH[mat[i + d]] !== PH_SOLID && (!barriers || !cleatMask[i + d]))) && enter(m, PH_POWDER, b + d, d, 1)) { move(i, b + d, x, y, nx, y + 1); return; }
if (nx >= 0 && nx < W && (!CORNER_SEAL || (PH[mat[b]] !== PH_SOLID && (!barriers || !cleatMask[b])) || (PH[mat[i + d]] !== PH_SOLID && (!barriers || !cleatMask[i + d]))) && (!barriers || (!cleatMask[i] && !cleatMask[b + d])) && enterFree(m, PH_POWDER, b + d, d, 1)) { move(i, b + d, x, y, nx, y + 1); return; }
nx = x - d;
if (nx >= 0 && nx < W && (!CORNER_SEAL || (PH[mat[b]] !== PH_SOLID && (!barriers || !cleatMask[b])) || (PH[mat[i - d]] !== PH_SOLID && (!barriers || !cleatMask[i - d]))) && enter(m, PH_POWDER, b - d, -d, 1)) { move(i, b - d, x, y, nx, y + 1); return; }
if (nx >= 0 && nx < W && (!CORNER_SEAL || (PH[mat[b]] !== PH_SOLID && (!barriers || !cleatMask[b])) || (PH[mat[i - d]] !== PH_SOLID && (!barriers || !cleatMask[i - d]))) && (!barriers || (!cleatMask[i] && !cleatMask[b - d])) && enterFree(m, PH_POWDER, b - d, -d, 1)) { move(i, b - d, x, y, nx, y + 1); return; }
}
}
function passable(m, ph, j, dx, dy) {
@@ -198,7 +203,7 @@ function simMove() {
const cx = ltr ? k : CW - 1 - k;
if (!awake[rowBase + cx]) continue;
roofDirty[cx] = 1;
const x0 = cx << 5, x1 = Math.min(W, x0 + 32);
const x0 = cx << 5, x1 = Math.min(W, x0 + 32), barriers = cleatChunks[rowBase + cx];
// alternate rows scan left to right and right to left, so nothing drifts one way
const dx = ltr ? 1 : -1, xEnd = ltr ? x1 : x0 - 1;
for (let x = ltr ? x0 : x1 - 1; x !== xEnd; x += dx) {
@@ -210,7 +215,7 @@ function simMove() {
if (ph === PH_SOLID) continue;
const p = part[i];
if (IS_SCREW[p] && ph === PH_POWDER) continue; // a screw conveyor moves its own grains
if (ph === PH_POWDER) powder(i, x, y, m); else if (ph === PH_LIQUID) liquid(i, x, y, m); else gas(i, x, y, m);
if (ph === PH_POWDER) powder(i, x, y, m, barriers); else if (ph === PH_LIQUID) liquid(i, x, y, m); else gas(i, x, y, m);
}
}
}