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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/render/world.js
+13 -4
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@@ -145,9 +145,11 @@ function drawWorld() {
r += lift; g += lift; b += lift * 1.08;
}
// built wall blocks read as tiles: light top-left edge, dark bottom-right edge
if (!sm && PH[m] === PH_SOLID && !(flags[i] & F_NAT) && blockP[(y >> 2) * BW + (x >> 2)] === BP_WALL) {
if (!sm && PH[m] === PH_SOLID && !(flags[i] & F_NAT) && isWall(blockP[(y >> 2) * BW + (x >> 2)])) {
const lx = x & 3, ly = y & 3;
if (lx === 0 || ly === 0) { r += 16; g += 16; b += 16; }
const wc = blockP[(y >> 2) * BW + (x >> 2)];
const edge = isSlope(wc) && (wc === BP_SLOPE_BL || wc === BP_SLOPE_TR ? lx === ly : lx + ly === 3);
if (edge || lx === 0 || ly === 0) { r += 16; g += 16; b += 16; }
else if (lx === 3 || ly === 3) { r -= 18; g -= 18; b -= 18; }
}
}
@@ -226,11 +228,17 @@ function drawWorld() {
else if (pt || PARTMAT[m] || mmask[row + bx]) cl = 4;
else if (m !== EMPTY) {
const ph = PH[m];
if (ph === PH_SOLID) cl = (!(flags[i] & F_NAT) && blockP[(y >> 2) * BW + (x >> 2)] === BP_WALL) ? 6 : 1;
if (ph === PH_SOLID) cl = (!(flags[i] & F_NAT) && isWall(blockP[(y >> 2) * BW + (x >> 2)])) ? 6 : 1;
else if (ph === PH_POWDER) cl = 2;
else if (ph === PH_LIQUID) cl = 3;
else cl = 5;
}
const wallCode = blockP[(y >> 2) * BW + (x >> 2)];
if (isSlope(wallCode) && ((m === EMPTY && !slopeCell(wallCode, x & 3, y & 3)) || (PH[m] === PH_SOLID && !(flags[i] & F_NAT)))) {
cl = wallCode;
const wm = WALL_OF[blockV[(y >> 2) * BW + (x >> 2)]];
r = COLR[wm]; g = COLG[wm]; b = COLB[wm];
}
top = cl << 24;
fpx[row + bx] = (tb ? 0xff000000 : 0) | (cl === 5 ? 0xff0000 : 0) | (cl === 3 ? 0xff00 : 0) | (cl === 1 && !builtForLight(i, x, y) ? 0xff : 0);
}
@@ -279,8 +287,9 @@ function drawWorld() {
const blocked = ghostBlocked.has(b), code = gv[0], v = gv[1];
let tr = 90, tg = 190, tb = 230;
if (blocked) { tr = 230; tg = 70; tb = 60; }
else if (code === BP_WALL && WALL_OF[v]) { const wm = WALL_OF[v]; tr = (COLR[wm] + 90) / 2; tg = (COLG[wm] + 190) / 2; tb = (COLB[wm] + 230) / 2; }
else if (isWall(code) && WALL_OF[v]) { const wm = WALL_OF[v]; tr = (COLR[wm] + 90) / 2; tg = (COLG[wm] + 190) / 2; tb = (COLB[wm] + 230) / 2; }
for (let dy = 0; dy < BS; dy++) for (let dx = 0; dx < BS; dx++) {
if (isSlope(code) && !slopeCell(code, dx, dy)) continue;
const sx = gbx * BS + dx - vx0, sy = gby * BS + dy - vy0;
if (sx < 0 || sy < 0 || sx >= bw || sy >= bh) continue;
const k = sy * bw + sx, c = px[k];