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Bloque de nieve

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Bloque de nieveArrastrá para girarlo
// «Bloque de nieve» · gpt-6-sol (medium)
// A square ground tile that tiles seamlessly: a full 48x48 footprint (x 0..47, y 0..47), 8 blocks thick (z 0..7), a perfectly flat solid slab with straight vertical sides and no gaps. The top 3 layers (z 5..7) are bright white snow in 2-3 cool shades (white, very pale blue) with soft bumps of 1 block; the snow hangs 1-2 blocks down the sides in an uneven icing edge; below it, dark frozen brown dirt with a few pale blue frost specks (z 0..4).

// A full-footprint, eight-block-thick snow tile.
const dirt = ["#4b352f", "#563b32", "#604139"];
const snow = ["#ffffff", "#f3fbff", "#e5f5ff"];

for (let x = 0; x < 48; x++) {
  for (let y = 0; y < 48; y++) {
    for (let z = 0; z < 8; z++) {
      if (z < 5) {
        let shade = z < 2 ? 0 : z < 4 ? 1 : 2;
        if (rand() < 0.045) shade = Math.max(0, shade - 1);
        set(x, y, z, dirt[shade]);
      } else {
        set(x, y, z, z === 5 ? snow[2] : z === 6 ? snow[1] : snow[0]);
      }
    }
  }
}

// Broad, low-contrast patches suggest soft one-block snow mounds
// without breaking the tile's flat, eight-block-high surface.
for (const [cx, cy, rx, ry] of [
  [10, 12, 6, 4], [33, 9, 7, 5], [23, 27, 8, 5],
  [8, 37, 5, 4], [39, 38, 5, 6]
]) {
  for (let x = Math.max(1, cx - rx); x <= Math.min(46, cx + rx); x++) {
    for (let y = Math.max(1, cy - ry); y <= Math.min(46, cy + ry); y++) {
      const d = ((x - cx) / rx) ** 2 + ((y - cy) / ry) ** 2;
      if (d < 0.7) set(x, y, 7, "#f3fbff");
      else if (d < 1) set(x, y, 7, "#eaf7ff");
    }
  }
}

// An irregular icing edge descends one or two blocks down the sides.
// All blocks remain inside the exact 48×48 footprint.
for (let i = 0; i < 48; i++) {
  for (let side = 0; side < 4; side++) {
    const x = side < 2 ? i : (side === 2 ? 0 : 47);
    const y = side < 2 ? (side === 0 ? 0 : 47) : i;
    const wave = Math.sin(i * 0.47 + side * 1.8)
               + 0.55 * Math.sin(i * 1.13 + side * 2.4);
    set(x, y, 4, wave > -0.55 ? snow[2] : dirt[2]);
    if (wave > 0.95) set(x, y, 3, snow[2]);
    if (wave > 1.45) set(x, y, 3, snow[1]);
    set(x, y, 5, snow[1]);
  }
}

// Sparse frost crystals on the exposed frozen dirt.
for (let side = 0; side < 4; side++) {
  for (let i = 2; i < 46; i++) {
    if (rand() < 0.13) {
      const x = side < 2 ? i : (side === 2 ? 0 : 47);
      const y = side < 2 ? (side === 0 ? 0 : 47) : i;
      const z = 1 + Math.floor(rand() * 3);
      if (get(x, y, z) !== snow[1] && get(x, y, z) !== snow[2])
        set(x, y, z, "#a9c8d2");
    }
  }
}