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Menhires

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MenhiresArrastrá para girarlo
// «Menhires» · gpt-6-sol (medium)
// A small Stonehenge-like circle of tall grey standing stones on a patch of grass: about six upright rough stone slabs in a ring, with two of them joined on top by a flat horizontal lintel stone, plus one fallen stone lying on the grass. Stones in several greys with green moss spots.

// Uneven, grassy patch of earth.
for (let x = 3; x <= 44; x++) {
  for (let y = 3; y <= 44; y++) {
    const dx = x - 24, dy = y - 24;
    const angle = Math.atan2(dy, dx);
    const edge = 19.5 + 0.8 * Math.sin(7 * angle) + 0.6 * Math.sin(13 * angle);
    if (Math.hypot(dx, dy) > edge) continue;

    set(x, y, 0, rand() < 0.2 ? "#594e3a" : "#695a40");
    set(x, y, 1, rand() < 0.25 ? "#695b3e" : "#756543");
    set(x, y, 2, ["#647b40", "#71884a", "#7c9150", "#829453"][Math.floor(rand() * 4)]);
    if (rand() < 0.045) set(x, y, 3, "#829653");
  }
}

// Chunky, slightly crooked slabs, with chipped edges and patchy moss.
function standingStone(cx, cy, w, d, height, lean) {
  for (let z = 3; z < 3 + height; z++) {
    const level = z - 3;
    const shift = Math.round(lean * level / height + 0.55 * Math.sin(level * 0.38 + cx));
    const narrowing = level > height - 5 ? 1 : 0;
    const x0 = Math.round(cx - w / 2) + shift;
    const x1 = x0 + w - 1 - narrowing;
    const y0 = Math.round(cy - d / 2);
    const y1 = y0 + d - 1;

    for (let x = x0; x <= x1; x++) {
      for (let y = y0; y <= y1; y++) {
        const edge = x === x0 || x === x1 || y === y0 || y === y1;
        const corner = (x === x0 || x === x1) && (y === y0 || y === y1);
        if (corner && rand() < 0.48) continue;
        if (edge && (level === 0 || level === height - 1) && rand() < 0.13) continue;

        let color = y === y0 ? "#9da49d" : "#878f89";
        if (x === x1 || y === y1) color = "#6f7974";
        if (level === height - 1) color = "#b0b5a8";
        if (rand() < 0.11) color = rand() < 0.5 ? "#777f79" : "#a5aaa0";

        // Moss gathers in broad, irregular patches on the lower faces.
        const mossPatch = Math.sin(x * 1.7 + z * 0.55 + cy) +
                          Math.cos(y * 2.1 - z * 0.34 + cx);
        if (edge && level < height * 0.72 &&
            mossPatch > 1.05 && rand() < 0.73)
          color = rand() < 0.45 ? "#667d4a" : "#778a54";
        set(x, y, z, color);
      }
    }
  }
}

// Six stones around an open center; the paired front stones support a lintel.
standingStone(16, 13, 6, 5, 23, -1);
standingStone(32, 13, 6, 5, 23, 1);
standingStone(10, 25, 5, 7, 20, -1);
standingStone(39, 25, 5, 7, 22, 1);
standingStone(17, 35, 7, 5, 21, 1);
standingStone(32, 35, 6, 5, 24, -1);

// Broad, flat lintel, with an uneven silhouette and a sunlit top.
for (let z = 26; z <= 30; z++) {
  for (let x = 12; x <= 36; x++) {
    for (let y = 10; y <= 16; y++) {
      const corner = (x < 14 || x > 34) && (y === 10 || y === 16);
      if (corner && rand() < 0.6) continue;
      if (z === 30 && (x === 12 || x === 36) && rand() < 0.7) continue;
      let color = z === 30 ? "#b2b5a7" :
                  y === 10 ? "#969d94" :
                  y === 16 ? "#747e78" : "#898f87";
      if (rand() < 0.09) color = "#a5aa9f";
      if ((y === 10 || z === 30) &&
          Math.sin(x * 0.8 + z) > 0.8 && rand() < 0.45)
        color = "#748651";
      set(x, y, z, color);
    }
  }
}

// One long fallen slab in the clearing, lying across the grass.
for (let x = 21; x <= 34; x++) {
  for (let y = 20; y <= 25; y++) {
    for (let z = 3; z <= 7; z++) {
      if ((x === 21 || x === 34) && (y === 20 || y === 25) && rand() < 0.8) continue;
      if (z === 7 && (y === 20 || y === 25) && rand() < 0.55) continue;
      let color = z === 7 ? "#a9aea3" :
                  y === 20 ? "#999f96" : "#767f79";
      if (rand() < 0.12) color = "#8a9189";
      if (z >= 6 && Math.sin(x * 0.9 + y * 1.2) > 1.1)
        color = "#738650";
      set(x, y, z, color);
    }
  }
}

// Sparse grass tufts and little stones around the monument.
for (let i = 0; i < 140; i++) {
  const x = 5 + Math.floor(rand() * 38);
  const y = 5 + Math.floor(rand() * 38);
  if (!get(x, y, 2) || get(x, y, 3)) continue;
  if (rand() < 0.78) {
    set(x, y, 3, rand() < 0.5 ? "#92a55a" : "#587642");
    if (rand() < 0.25) set(x, y, 4, "#869c55");
  } else {
    set(x, y, 3, rand() < 0.5 ? "#a0a39a" : "#777e76");
  }
}