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Sloped walls with a flat 45° face, and diagonal wall lines (t36)

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- New Sloped wall piece: a half-block triangle in any wall material, at half a wall's cost.
  Dragging walls or slopes at about 45° lays a diagonal line; the drag picks the slope's
  orientation and T flips or turns it.
- Each slope fills one cell past its corner, so a diagonal run is sealed against grains and water.
- New test/t_slopes.js: a slope funnel passes 400/400 sand (square steps 379/400).

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
This commit is contained in:
44r0n7
2026-10-25 17:17:51 -04:00
co-authored by Claude Opus 5.5
parent 1a300bf744
commit 381019b7aa
21 changed files with 311 additions and 58 deletions
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src/ui/previews.js
+19 -8
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@@ -14,7 +14,7 @@ function drawGrid(cbx, cby, radius) {
ctx.restore();
}
function previewColor(code, v) {
if (code === BP_WALL) { const m = WALL_OF[v]; return `${COLR[m]},${COLG[m]},${COLB[m]}`; }
if (isWall(code)) { const m = WALL_OF[v]; return `${COLR[m]},${COLG[m]},${COLB[m]}`; }
if (code === BP_FILTER) return '96,100,110';
return { [BP_BELT]: '110,114,124', [BP_TUBE]: '120,132,150', [BP_SHAFT]: '160,118,70', [BP_GRATE]: '170,90,66', [BP_GATE]: '160,84,64', [BP_PIPE]: '176,112,72', [BP_PUMP]: '104,122,142', [BP_OUTLET]: '170,106,66' }[code] || '120,200,190';
}
@@ -100,28 +100,28 @@ function drawPreviews() {
if (reachOk && (blowing || GAME.lmb)) drawAirStreaks(ax, ay, p, r, blowing);
}
} else if (t === 'build') {
const P = piece(), b = aimBlock();
const P = piece(), b = aimBlock(), code = pieceCode(P, b);
drawGrid(b.bx, b.by, 9);
let cells = [], col = '120,200,190';
if (P.kind === 'block') {
const v = pieceV(P);
col = previewColor(P.code, v);
cells = GAME.drag ? (modShift() ? blockRect(GAME.drag.bx, GAME.drag.by, b.bx, b.by) : blockLine(GAME.drag.bx, GAME.drag.by, b.bx, b.by)) : [[b.bx, b.by]];
col = previewColor(code, v);
cells = GAME.drag ? (modShift() ? blockRect(GAME.drag.bx, GAME.drag.by, b.bx, b.by) : blockLine(GAME.drag.bx, GAME.drag.by, b.bx, b.by, isWall(code))) : [[b.bx, b.by]];
const dd = GAME.drag ? dragDirFor(P, GAME.drag, b) : -1;
if (dd !== GAME.dragDir) { GAME.dragDir = dd; hudDirty = true; }
const dIdx = dd >= 0 ? dd : (GAME.pieceDir[P.id] || 0);
const afford = canAfford(pieceCostNow(P), cells.length);
for (const [bx, by] of cells) {
const err = canPlaceBlock(bx, by), rb = by * BW + bx;
const swap = GAME.replace && !!blockP[rb] && /already built/.test(err) && !blockIs(rb, P.code, v, pieceExtra(P));
const err = canPlaceBlock(bx, by, code), rb = by * BW + bx;
const swap = GAME.replace && !!blockP[rb] && /already built/.test(err) && !blockIs(rb, code, v, pieceExtra(P));
const ghost = !blockInReach(bx, by) && (!err || /bar/.test(err)); // out of reach: it will be a ghost
const ok = (!err || swap) && !ghost && afford;
const [x, y, w, h] = blockRectPx(bx, by, 1, 1);
ctx.fillStyle = ghost ? 'rgba(90,190,230,0.22)' : ok ? (swap ? 'rgba(255,190,90,0.5)' : `rgba(${col},0.55)`) : 'rgba(239,106,85,0.35)';
ctx.fillRect(x, y, w, h);
previewBlock(code, x, y, w, h);
ctx.strokeStyle = ghost ? 'rgba(90,190,230,0.8)' : ok ? 'rgba(236,226,210,0.8)' : 'rgba(239,106,85,0.9)'; ctx.lineWidth = Math.max(1, zp * 0.25);
if (ghost) ctx.setLineDash([zp, zp * 0.7]);
ctx.strokeRect(x + 0.5, y + 0.5, w - 1, h - 1); ctx.setLineDash([]);
previewBlock(code, x, y, w, h, true); ctx.setLineDash([]);
if (P.dirs && (P.id === 'belt' || P.id === 'tube' || P.filter || P.id === 'pump' || P.id === 'outlet')) {
// a chevron on every block, pointing the way it will carry (or pump, or pour)
const [dx, dy] = P.id === 'tube' ? [[0, -1], [1, 0], [0, 1], [-1, 0]][dIdx] : P.id === 'pump' ? PUMP_V[dIdx] : P.id === 'outlet' ? OUTLET_V[dIdx] : [[-1, 0], [1, 0]][dIdx];
@@ -190,3 +190,14 @@ function drawPreviews() {
if (t === 'build' && GAME.replace && !sel && !pasting) drawTag('Replace', '255,190,90', p.x + BS * zp * 1.2, p.y + BS * zp * 1.4);
drawCursorLabel(p.x, p.y, t === 'vacuum' ? GAME.brush[GAME.tool] : t === 'ignite' || t === 'drill' ? 1 : 2);
}
function previewBlock(code, x, y, w, h, stroke = false) {
const ctx = R.ctx;
if (!isSlope(code)) { if (stroke) ctx.strokeRect(x, y, w, h); else ctx.fillRect(x, y, w, h); return; }
const right = code === BP_SLOPE_BR || code === BP_SLOPE_TR, above = code >= BP_SLOPE_TL;
ctx.beginPath();
ctx.moveTo(x + (right ? w : 0), y + (above ? 0 : h));
ctx.lineTo(x + (right ? w : 0), y + (above ? h : 0));
ctx.lineTo(x + (right ? 0 : w), y + (above ? 0 : h)); ctx.closePath();
if (stroke) ctx.stroke(); else ctx.fill();
}