蜂の巣箱

// Beehive — 32x48 floor prop, top-down 3/4, key light top-left.// A straw skep (a bell of coiled straw bands that curve with the dome, a twisted knot on top, a dark arched entrance// at the foot) on a short wooden stand; beside it on the ground a clay honey pot with a twine tie, honey dribbling// over the lip and a grooved wooden dipper standing in it, head up.// Variants://   idle   16f loop: three bees (gold + ink, beating wings) circle the entrance on separate paths//   swarm  12f loop: a dozen agitated bees whirl around the whole skep, some passing behind it//   honey  16f loop: a drop of honey swells on the dipper head, stretches, falls into the pot and rings the surface;//                    the glint on the honey slides; one lazy bee hovers by the entranceconst W = 32, H = 48, GROUND = 45;const N_IDLE = 16, N_SWARM = 12, N_HONEY = 16;const SKEP = { cx: 11, base: 31, h: 19, rx: 8.6 };const ENTR = { x: 11, y: 29 };const POT = { cx: 25, top: 34, bottom: 44, rx: 5 };const DIP = { hx: 27, hy: 23 };                     // dipper head centre// ---- stand --------------------------------------------------------------------------------------------------------function stand(g) {  g.part("standLegs", () => {    for (const [x0, lit] of [[3, true], [17, false]]) {      for (let y = 35; y <= 44; y++) {        g.pixel(x0, y, lit ? "w3" : "w2");        g.pixel(x0 + 1, y, lit ? "w2" : "w1");      }      g.pixel(x0 + 1, 37, "w1");                                                  // a knot in the grain    }    g.line([5, 39], [16, 39], "w1");                                             // rear stretcher, in shadow  });  g.part("standTop", () => {    for (let x = 1; x <= 21; x++) {      const u = (x - 1) / 20;      g.pixel(x, 31, u < 0.3 ? "w4" : "w3");      g.pixel(x, 32, u < 0.6 ? "w3" : "w2");      g.pixel(x, 33, u < 0.2 ? "w2" : "w1");                                     // front edge of the plank      g.pixel(x, 34, "w0");    }    for (const x of [7, 14]) g.pixel(x, 33, "w0");                                // plank joins    g.pixel(19, 32, "w1"); g.pixel(4, 32, "w4");  });}// ---- skep ---------------------------------------------------------------------------------------------------------const BAND = 3;function skepHalfWidth(y) {  const { base, h, rx } = SKEP;  const k = (base - y) / h;                                                       // 0 at the foot .. 1 at the crown  if (k < 0 || k > 1) return -1;  return rx * Math.pow(Math.max(0, 1 - Math.pow(k, 2.1)), 0.5) + (k < 0.12 ? 0.5 : 0);}function skep(g) {  const { cx, base, h } = SKEP;  g.part("skep", () => g.field({ x: [cx - 10, cx + 10], y: [base - h, base] }, (x, y) => {    const hw = skepHalfWidth(y);    if (hw < 0.6) return null;    const nx = (x + 0.5 - cx) / hw;    if (Math.abs(nx) > 1) return null;    const k = (base - y) / h;    // coils are rings seen from above: the band lines dip toward the front centre    const yy = y - 1.6 * Math.sqrt(Math.max(0, 1 - nx * nx));    const r = (((Math.floor(base - yy) % BAND) + BAND) % BAND);                  // 0 groove .. 2 crown of the coil    let v = -0.85 * nx + 0.5 * k - 0.1;    v += r === 2 ? 0.45 : r === 1 ? 0.1 : -0.55;    // stitches binding the coils: short dark ticks on the groove, staggered per band    const band = Math.floor((base - yy) / BAND);    if (r === 0 && (x + band * 2) % 5 === 0) return "w1";    if (Math.abs(nx) > 0.93) v -= 0.35;                                           // the dome turns away at the edge    return v > 0.75 ? "g3" : v > 0.15 ? "g2" : v > -0.45 ? "g1" : v > -0.95 ? "g0" : "w1";  }));  g.part("skepKnot", () => {    // twisted straw knot at the crown    g.pixel(cx - 1, base - h - 1, "g2"); g.pixel(cx, base - h - 1, "g1");    g.pixel(cx - 1, base - h - 2, "g3"); g.pixel(cx, base - h - 2, "g2");    g.pixel(cx, base - h, "g0");  });  g.part("entrance", () => {    const { x, y } = ENTR;    g.fillPoly([[x - 2, y + 2], [x - 2, y], [x - 1, y - 1], [x + 1, y - 1], [x + 2, y], [x + 2, y + 2]], "ink");    g.line([x - 3, y + 2], [x - 3, y], "g0"); g.pixel(x - 2, y - 1, "g0");         // straw lip of the arch    g.pixel(x - 1, y - 2, "g3"); g.pixel(x, y - 2, "g2"); g.pixel(x + 1, y - 2, "g1");    g.pixel(x, y + 1, "n0");                                                      // a little depth inside  });}// ---- honey pot + dipper -------------------------------------------------------------------------------------------function pot(g) {  const { cx, top, bottom, rx } = POT;  g.part("pot", () => {    g.field({ x: [cx - rx - 1, cx + rx + 1], y: [top + 2, bottom] }, (x, y) => {      // squat belly: widest two-thirds of the way down      const k = (y - top - 2) / (bottom - top - 2);      const hw = 3.6 + 2.0 * Math.sin(Math.PI * Math.min(1, k * 1.15)) - (k > 0.9 ? 0.8 : 0);      const nx = (x + 0.5 - cx) / hw;      if (Math.abs(nx) > 1) return null;      const nz = Math.sqrt(1 - nx * nx);      const v = -0.6 * nx + 0.5 * nz - k * 0.35;      return v > 0.55 ? "w4" : v > 0.15 ? "w3" : v > -0.3 ? "w2" : v > -0.65 ? "w1" : "w0";    });    // rim: a lit ring, honey in the mouth    g.ellipse({ x: [cx - 4, cx + 4], y: [top, top + 3] }, "w2", { fill: "w2" });    g.line([cx - 3, top], [cx + 1, top], "w4"); g.pixel(cx - 4, top + 1, "w3");    g.ellipse({ x: [cx - 3, cx + 3], y: [top + 1, top + 2] }, "g1", { fill: "g1" });    g.line([cx - 2, top + 1], [cx + 1, top + 1], "g2");    g.pixel(cx + 3, top + 3, "w1"); g.pixel(cx + 4, top + 2, "w1");    // twine tie under the rim    for (let x = cx - 4; x <= cx + 4; x++) g.pixel(x, top + 4, x < cx - 1 ? "w3" : x < cx + 2 ? "w1" : "w0");    g.pixel(cx - 3, top + 5, "w3"); g.pixel(cx - 4, top + 6, "w1");               // dangling end    // honey dribbling over the lip    g.pixel(cx - 1, top + 3, "g2"); g.pixel(cx - 1, top + 4, "g2"); g.pixel(cx - 1, top + 5, "g1");    g.pixel(cx, top + 3, "g1"); g.pixel(cx - 1, top + 6, "g1"); g.pixel(cx - 2, top + 5, "g3");  });}function dipper(g) {  const { hx, hy } = DIP;  g.part("dipperHandle", () => {    // the handle runs down-left from the head into the honey    g.line([hx - 1, hy + 3], [hx - 4, POT.top + 1], "w3");    g.line([hx, hy + 3], [hx - 3, POT.top + 1], "w1");  });  g.part("dipperHead", () => {    // grooved head, coated in honey: ridges lit on the left, grooves dark    for (let dy = -2; dy <= 2; dy++) {      for (let dx = -1; dx <= 1; dx++) {        const ridge = (dy + 2) % 2 === 0;        const k = ridge ? (dx < 0 ? "g3" : dx === 0 ? "g2" : "g1") : (dx < 0 ? "g1" : dx === 0 ? "g0" : "w1");        g.pixel(hx + dx, hy + dy, k);      }    }    g.pixel(hx, hy - 3, "w2"); g.pixel(hx, hy + 3, "g1");                            // knob on top, honey collar below  });}// honey drip, f in 0..N_HONEY-1; returns nothing when the cycle is between dropsfunction drip(g, f, still) {  const { hx, hy } = DIP, surf = POT.top + 1;  const x = hx + 1, y0 = hy + 3;                                                   // drips off the head's lower right  g.detached("drip", () => {    if (still) { g.pixel(x, y0, "g1"); return; }    // swell (0-5), stretch (6-8), fall (9-11), splash + rings (12-15)    if (f <= 5) {      g.pixel(x, y0, f < 3 ? "g1" : "g2");      if (f >= 3) { g.pixel(x, y0 + 1, "g2"); g.pixel(x + 1, y0 + 1, "g1"); }      if (f >= 5) { g.pixel(x, y0 + 2, "g1"); g.pixel(x, y0 + 1, "g3"); }    } else if (f <= 8) {      const len = f - 4;                                                           // 2..4      g.line([x, y0], [x, y0 + len - 1], "g1");      g.rect({ x: [x, x + 1], y: [y0 + len, y0 + len + 1] }, "g2", { fill: "g2" });      g.pixel(x, y0 + len, "g3"); g.pixel(x + 1, y0 + len + 1, "g1");    } else if (f <= 11) {      const y = y0 + 4 + (f - 9) * 3;      if (y < surf - 1) {        g.rect({ x: [x, x + 1], y: [y, y + 1] }, "g2", { fill: "g2" });        g.pixel(x, y, "g3"); g.pixel(x + 1, y + 1, "g1"); g.pixel(x, y - 1, "g1");      }      if (f === 9) g.pixel(x, y0, "g1");                                          // the thread snaps back    } else {      const r = f - 11;                                                            // 1..4 rings widen      if (r <= 3) {        g.pixel(x - r, surf, "g3"); g.pixel(Math.min(POT.cx + 3, x + r - 1), surf, r < 3 ? "g3" : "g2");      }      if (r === 1) g.pixel(x - 1, surf - 1, "g2");                                 // a small crown on impact    }  });}function honeyGlint(g, t) {  // a glint that slides slowly across the honey in the mouth  const x = POT.cx - 2 + Math.round(2.5 * (0.5 - 0.5 * Math.cos(TAU * t)));  g.part("honeyGlint", () => { g.pixel(x, POT.top + 1, "g3"); g.pixel(x + 1, POT.top + 1, "g2"); });}// ---- bees ---------------------------------------------------------------------------------------------------------// a bee: gold body with an ink stripe trailing behind its heading, a pale wing that beats every framefunction bee(g, x, y, dir, wingUp, name) {  x = Math.round(x); y = Math.round(y);  g.detached(name, () => {    g.pixel(x + dir, y, "g2");                                                     // head end    g.pixel(x, y, "ink");                                                          // stripe    g.pixel(x - dir, y, "g1");                                                     // abdomen    if (wingUp) { g.pixel(x, y - 1, "n5"); g.pixel(x - dir, y - 1, "n4"); } else g.pixel(x, y + 1, "n4");  });}function pathBee(g, fn, t, frame, name, behind) {  const [x, y, back] = fn(t);  const [x2] = fn(t + 0.004);  if (!!back !== !!behind) return;  bee(g, x, y, x2 >= x ? 1 : -1, (frame + name.length) % 2 === 0, name);}const IDLE_BEES = [  (t) => [ENTR.x + 7 * Math.cos(TAU * t), ENTR.y - 1 + 3 * Math.sin(TAU * t), false],                 // ring at the door  (t) => [SKEP.cx + 8 * Math.sin(TAU * -t + 1), 7 + 3 * Math.sin(TAU * -2 * t + 2), false],           // figure-eight over the crown  (t) => { const a = TAU * 2 * t + 2.2; return [SKEP.cx + 11 * Math.cos(a), 21 + 5 * Math.sin(a), Math.sin(a) < -0.2]; },];function swarmBee(i) {  const f1 = 1 + (i % 3), f2 = 2 + (i % 2), s = i % 2 ? 1 : -1;  const rx = 8 + (i * 37 % 6), ry = 3 + (i * 13 % 4), cy = 5 + (i * 7 % 23), ph = i * 0.61;  return (t) => {    const a = TAU * f1 * s * t + ph;    return [SKEP.cx + 1 + rx * Math.cos(a), cy + ry * Math.sin(TAU * f2 * t + ph * 1.7) * 0.6 + 1.5 * Math.sin(a), Math.sin(a) < -0.5 && cy > 15];  };}const SWARM = Array.from({ length: 12 }, (_, i) => swarmBee(i));// ---- scene --------------------------------------------------------------------------------------------------------const Beehive = sprite(pal, (g, t, mode) => {  t = ((t % 1) + 1) % 1;  const n = mode === "swarm" ? N_SWARM : mode === "honey" ? N_HONEY : N_IDLE;  const frame = Math.round(t * n) % n;  contactShadow(g, 11, GROUND, 10, 1);  contactShadow(g, POT.cx, GROUND, 5, 1);  const bees = mode === "swarm" ? SWARM : mode === "honey" ? [IDLE_BEES[0]] : IDLE_BEES;  bees.forEach((fn, i) => pathBee(g, fn, t, frame, "beeB" + i, true));             // bees behind the skep  g.outlined("ink", () => { stand(g); skep(g); });  g.outlined("ink", () => { pot(g); dipper(g); });  if (mode === "honey") { honeyGlint(g, t); drip(g, frame, false); }  else { honeyGlint(g, 0); drip(g, 0, true); }  // jitter for the swarm: a pixel of nervous wobble that repeats with the loop  bees.forEach((fn, i) => {    const jf = mode === "swarm" ? (tt) => { const p = fn(tt); const j = Math.round(hash(i, frame) * 2 - 1); return [p[0] + j, p[1] + (frame + i) % 2, p[2]]; } : fn;    pathBee(g, jf, t, frame, "bee" + i, false);  });});submit(Beehive, {  size: [W, H], origin: "top-left", kind: "icon", scale: 1,  animate: { fps: 10, duration: N_IDLE / 10, loop: true },  anchor: { x: 16, y: GROUND },  args: ["idle"],  variants: [    { name: "idle", args: ["idle"] },    { name: "swarm", args: ["swarm"], animate: { fps: 10, duration: N_SWARM / 10, loop: true } },    { name: "honey", args: ["honey"], animate: { fps: 10, duration: N_HONEY / 10, loop: true } },  ],});