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Ánfora

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ÁnforaArrastrá para girarlo
// «Ánfora» · gpt-6-sol (medium)
// Amphora («Ánfora»).

const cx = 24, cy = 24;
const clay = ["#a65c31", "#b86c37", "#c77b3e", "#d28a49"];
const shadow = "#493326";
const deep = "#302720";
const darkClay = "#714325";
const gold = "#e7a75b";

const radius = [
  5, 7, 8, 8, 7, 5, 5, 6, 7, 9,
  11, 12, 13, 14, 15, 15, 16, 16, 16, 16,
  16, 16, 15, 15, 14, 13, 12, 11, 9, 8,
  7, 7, 7, 7, 7, 7, 7, 8, 9, 9, 8
];

// Turn the amphora as stacked, solid rings. The opening is recessed into the neck.
for (let z = 0; z < radius.length; z++) {
  const r = radius[z];
  for (let x = cx - r; x <= cx + r; x++) {
    for (let y = cy - r; y <= cy + r; y++) {
      const d = Math.hypot(x - cx, y - cy);
      if (d > r + 0.12) continue;
      if (z >= 36 && d < (z >= 38 ? 4.5 : 4.1)) continue;

      const edge = d > r - 1.45;
      let color = clay[1];

      if (z === 0 || (z <= 4 && d > r - 1.2)) color = darkClay;
      else if (z === 35 || z === 36 || z === 30 || z === 31)
        color = z === 35 ? shadow : darkClay;
      else if (z === 37) color = "#694026";
      else if (z === 38 || z === 39) color = "#b96e38";
      else if (z === 40) color = gold;
      else if (z === 26 || z === 27) color = darkClay;
      else if (z === 22) color = "#784626";
      else if (z === 8) color = "#714027";
      else if (z === 3 || z === 4) color = "#d08a48";

      if (edge && z !== 40) {
        const light = (x < cx ? 1 : 0) + (y < cy ? 1 : 0);
        if (color === clay[1])
          color = clay[Math.min(3, Math.max(0, light + (rand() < 0.13 ? 1 : 0)))];
        if (z >= 11 && z <= 21 && rand() < 0.11)
          color = rand() < 0.55 ? "#91512b" : "#df9550";
        if (z === 1 || z === 9 || z === 23 || z === 29)
          color = rand() < 0.73 ? darkClay : "#a35c2e";
      }
      set(x, y, z, color);
    }
  }
}

// A dark bottom in the mouth, with irregular inner ceramic walls.
for (let x = 19; x <= 29; x++)
  for (let y = 19; y <= 29; y++) {
    const d = Math.hypot(x - cx, y - cy);
    if (d < 4.5) set(x, y, 35, d < 3.2 ? deep : "#654027");
  }
for (let z = 36; z <= 39; z++)
  for (let a = 0; a < Math.PI * 2; a += 0.075) {
    const r = z >= 38 ? 4.7 : 4.3;
    set(cx + r * Math.cos(a), cy + r * Math.sin(a), z,
        z === 39 && a > Math.PI ? "#8a4d29" : "#442c20");
  }

function surface(a, z, offset, color) {
  const r = radius[z] + offset;
  set(cx + r * Math.cos(a), cy + r * Math.sin(a), z, color);
}

// Thick, chipped-looking lip and its bright upper edge.
for (let a = 0; a < Math.PI * 2; a += 0.045) {
  surface(a, 37, 0.2, rand() < 0.18 ? "#30271f" : "#593824");
  surface(a, 38, 0.3, rand() < 0.26 ? "#edaa59" : "#bd753a");
  surface(a, 39, 0.3, rand() < 0.17 ? darkClay : "#d98b45");
  surface(a, 40, 0.1, rand() < 0.14 ? "#f5ba69" : gold);
}

// Narrow, dark bands around the neck.
for (let a = 0; a < Math.PI * 2; a += 0.055) {
  surface(a, 30, 0.3, "#493025");
  surface(a, 31, 0.3, rand() < 0.23 ? "#c0783c" : "#694028");
  surface(a, 34, 0.2, rand() < 0.18 ? "#d28843" : "#884b29");
  surface(a, 35, 0.3, "#392c23");
}

// Raised decorative cord and jagged painted pattern on the shoulders.
for (let a = 0; a < Math.PI * 2; a += 0.045) {
  surface(a, 22, 0.35, rand() < 0.17 ? "#d68c46" : "#553726");
  surface(a, 23, 0.3, rand() < 0.18 ? gold : "#b46b35");

  const point = Math.cos(a * 11);
  const z = point > 0.26 ? 26 : point < -0.26 ? 24 : 25;
  surface(a, z, 0.5, point > 0.26 ? shadow : "#513323");
  surface(a, z + 1, 0.35, rand() < 0.18 ? gold : "#9c592d");

  if (Math.cos(a * 11) > 0.75)
    surface(a, 27, 0.55, "#3c2d23");
}

// Short dark flutes, separated by raised amber ribs, around the broad belly.
for (let a = 0; a < Math.PI * 2; a += Math.PI / 8) {
  for (let z = 13; z <= 20; z++) {
    const taper = z < 15 || z > 19;
    surface(a, z, 0.5, taper ? "#784426" : "#503526");
    surface(a + 0.065, z, 0.45, "#e0984e");
    if (z >= 16 && z <= 19)
      surface(a - 0.045, z, 0.45, "#704027");
  }
  surface(a, 21, 0.5, "#3e2e23");
}

// Stamped marks above the foot.
for (let a = 0; a < Math.PI * 2; a += Math.PI / 9) {
  surface(a, 10, 0.45, "#523424");
  surface(a + 0.055, 11, 0.35, "#754127");
  surface(a, 3, 0.35, "#eda251");
}

// Angular, heavy loop handles. A dark outer contour surrounds warm clay cores.
function handle(points) {
  for (let i = 0; i < points.length - 1; i++) {
    const p = points[i], q = points[i + 1];
    line(...p, ...q, 2.65, deep);
  }
  for (let i = 0; i < points.length - 1; i++) {
    const p = points[i], q = points[i + 1];
    line(...p, ...q, 1.8, "#a86132");
    line(p[0], p[1] - 0.55, p[2] + 0.4,
         q[0], q[1] - 0.55, q[2] + 0.4, 0.8, "#dd9249");
  }
}
handle([
  [18, 24, 34], [14, 24, 35], [9, 24, 34], [6, 24, 31],
  [6, 23, 27], [9, 23, 24], [13, 23, 22], [18, 23, 25]
]);
handle([
  [30, 25, 35], [35, 25, 38], [40, 25, 37], [43, 25, 34],
  [43, 25, 30], [41, 24, 27], [37, 24, 24], [32, 24, 26]
]);

// Dark attachment collars make the handles feel joined to the vessel.
for (const [x, y, z] of [[18, 24, 34], [30, 25, 35],
                          [18, 23, 25], [32, 24, 26]]) {
  box(x - 1, y - 1, z - 1, x + 1, y + 1, z, "#654027");
  set(x, y - 2, z, "#d28a49");
}