麦の束

// Wheat sheaf — 32x48 floor prop, top-down 3/4, key light top-left.// A tall hand-bound sheaf of ripe wheat standing on stubble: straw stalks pinched at the waist by a red ribbon// and twine, flaring out at the foot, a crown of heavy golden ears with whiskery awns, and a sickle (wooden grip,// iron crescent blade) leaning against its right side.// Variants://   idle      16f loop: a breeze runs across the ears (each ear nods a little after its neighbour), the crown leans//                       and returns, the ribbon tails stir, a couple of grains drift off and fall//   gust      12f loop: a strong wind bends the crown hard to the right with a fast flutter; three loose stalks//                       tumble across the canvas (they leave on the right and come back in on the left), chaff streams//   festival  16f loop: corn-dolly dressing for the fair: a woven straw star crowns the sheaf, a big red bow with//                       long streamers (and a blue one) flutters, poppies and cornflowers are tucked into the tieconst W = 32, H = 48, GROUND = 45, CX = 16;const WAIST = 31, TOP = 19;const N_IDLE = 16, N_GUST = 12;const L = [-0.74, -0.67];const STRAW = ["w1", "w2", "g1", "w4", "g2"];const EAR_F = ["g0", "g1", "g2", "g3"], EAR_B = ["w1", "g0", "g1", "g2"];// ---- the bundle of stalks -------------------------------------------------------------------------------------const halfW = (y) => y >= WAIST ? 3.4 + 4.3 * Math.pow((y - WAIST) / (GROUND - 1 - WAIST), 1.4)  : 3.4 + 3.2 * Math.pow((WAIST - y) / (WAIST - TOP), 1.15);const centre = (y, bend) => CX + (y < WAIST ? bend * Math.pow((WAIST - y) / (WAIST - TOP), 2) : 0);function stalks(g, bend) {  g.part("stalks", () => g.field({ x: [5, 27], y: [TOP - 1, GROUND] }, (x, y) => {    const hw = halfW(y), u = (x + 0.5 - centre(y, bend)) / hw;    const sid = Math.floor(((u + 1) / 2) * 9);    // ragged cut ends at the foot: alternate stalks reach one pixel lower    if (y >= GROUND - 1 && (sid % 2 === 1 || y === GROUND)) return null;    if (Math.abs(u) > 1) return null;    const f = ((u + 1) / 2) * 9 - sid;    const lit = -0.85 * u + 0.35 * Math.sqrt(1 - u * u) - (y > WAIST ? 0 : 0.1);    let k = lit > 0.6 ? 3 : lit > 0.15 ? 2 : lit > -0.35 ? 1 : 0;    if (f < 0.22 && k > 0) k--;                                         // the gap between two stalks    if (y === GROUND - 2 && k < 3) k++;                                 // light catching the cut ends    if (y < WAIST && y > WAIST - 3 && k > 0) k--;                       // pinched just above the tie    if (k === 3 && f > 0.55 && f < 0.8 && (y % 5 === 1)) return STRAW[4]; // a node glinting on a lit stalk    return STRAW[k];  }));}function stubble(g, gust, front) {  const lean = Math.round(gust * 1.2);  g.part(front ? "stubbleFront" : "stubbleBack", () => {    const list = front ? [[4, 2], [7, 3], [10, 1], [21, 2], [24, 3], [27, 2]] : [[3, 2], [6, 1], [9, 3], [12, 2], [20, 3], [23, 1], [26, 2], [28, 1]];    for (const [x, h] of list) {      const yb = front ? GROUND + 1 : GROUND - 1;      g.line([x, yb], [x + (h > 1 ? lean : 0), yb - h], h > 2 ? "w3" : "w2");      g.pixel(x + (h > 1 ? lean : 0), yb - h, "g1");    }  });}// ---- ears ----------------------------------------------------------------------------------------------------const EARS = [];for (let i = 0; i < 11; i++) {  const s = (i / 10) * 2 - 1;  EARS.push({ s, front: i % 2 === 0, len: 6.2 + (1 - Math.abs(s)) * 1.3, lift: (1 - s * s) * 3 });}function earGeom(e, bend, swayAt) {  const by = TOP + 1 - e.lift + (e.front ? 0 : -1.5);  const bx = centre(by, bend) + e.s * 5.4;  const th = e.s * 0.78 + swayAt(e.s);                                 // radians from vertical, + = to the right  const droop = e.s * 0.35 + swayAt(e.s) * 0.5;                        // the heavy head nods further  const d1 = [Math.sin(th), -Math.cos(th)], d2 = [Math.sin(th + droop), -Math.cos(th + droop)];  const p0 = [bx, by], p1 = [bx + d1[0] * e.len * 0.5, by + d1[1] * e.len * 0.5];  const p2 = [p1[0] + d2[0] * e.len * 0.55, p1[1] + d2[1] * e.len * 0.55];  return { p0, p1, p2, dir: d2 };}function ear(g, e, bend, swayAt) {  const { p0, p1, p2 } = earGeom(e, bend, swayAt);  const dx = p2[0] - p0[0], dy = p2[1] - p0[1], len = Math.hypot(dx, dy) || 1;  const nl = (-dy / len) * L[0] + (dx / len) * L[1];                   // does +v face the light?  const ramp = e.front ? EAR_F : EAR_B;  // a short bare neck of stalk, then the plump head of grain  g.line([Math.round(p0[0]), Math.round(p0[1])], [Math.round(p1[0]), Math.round(p1[1])], e.front ? "w4" : "g1");  g.sweep([[p0[0] + (p1[0] - p0[0]) * 0.45, p0[1] + (p1[1] - p0[1]) * 0.45], p1, p2], { w0: 1.25, w1: 0.6, profile: 0.7 }, (u, v) => {    let l = v * nl * 1.3 + 0.3 - u * 0.25;    if (Math.abs(v) > 0.55 && v * nl < 0) l -= 0.5;                     // the shadow flank parts it from its neighbour    if (Math.floor(u * 6) % 2 === 1 && Math.abs(v) < 0.5) l -= 0.35;    // rows of kernels down the middle    return ramp[l > 0.75 ? 3 : l > 0.15 ? 2 : l > -0.45 ? 1 : 0];  });}function awns(g, bend, swayAt, front) {  g.detached(front ? "awnsFront" : "awnsBack", () => {    for (const e of EARS) {      if (e.front !== front) continue;      const { p2, dir } = earGeom(e, bend, swayAt);      const a = [Math.round(p2[0] + dir[0] * 1.2), Math.round(p2[1] + dir[1] * 1.2)];      const b = [Math.round(p2[0] + dir[0] * 3.4 + dir[1] * 0.8), Math.round(p2[1] + dir[1] * 3.4 - dir[0] * 0.8)];      g.line(a, b, front ? "w4" : "g1");    }  });}function crown(g, bend, swayAt) {  g.outlined("ink", () => g.part("earsBack", () => { for (const e of EARS) if (!e.front) ear(g, e, bend, swayAt); }));  awns(g, bend, swayAt, false);}function crownFront(g, bend, swayAt) {  g.outlined("ink", () => g.part("earsFront", () => { for (const e of EARS) if (e.front) ear(g, e, bend, swayAt); }));  awns(g, bend, swayAt, true);}// ---- tie, ribbon tails -----------------------------------------------------------------------------------------function tie(g, flutter) {  g.part("tie", () => {    for (let x = 12; x <= 20; x++) {      const k = x < 14 ? "r2" : x < 18 ? "r1" : "r0";      g.pixel(x, WAIST, k); g.pixel(x, WAIST + 1, x < 16 ? "r1" : "r0");    }    g.pixel(12, WAIST, "r3");    for (let x = 13; x <= 19; x += 2) g.pixel(x, WAIST - 1, "w3");        // twine wrap above the ribbon    g.pixel(13, WAIST - 1, "w4");  });  g.part("bow", () => {    // loops either side of a knot at the front-left    g.fillPoly([[13, WAIST], [10, WAIST - 2], [10, WAIST + 1]], "r2");    g.fillPoly([[13, WAIST], [16, WAIST - 2], [16, WAIST + 1]], "r1");    g.pixel(10, WAIST - 2, "r3"); g.pixel(16, WAIST + 1, "r0");    g.rect({ x: [12, 13], y: [WAIST, WAIST + 1] }, "r0", { fill: "r0" }); g.pixel(12, WAIST, "r2");  });  g.part("tails", () => {    // two short ribbon ends hanging from the knot, two pixels wide    for (const [x0, ph, dir, n] of [[11, 0, -1, 5], [13, 0.3, 1, 4]]) {      for (let i = 1; i <= n; i++) {        const x = Math.round(x0 + dir * i * 0.3 + flutter(i / n, ph) * (i / n));        const y = WAIST + 1 + i;        g.pixel(x, y, i === n ? "r1" : "r2"); g.pixel(x + 1, y, i === n ? "r0" : "r1");      }    }  });}// ---- sickle ----------------------------------------------------------------------------------------------------function sickle(g, festive) {  g.part("sickleGrip", () => {    g.line([26, 44], [24, 37], "w3"); g.line([27, 44], [25, 37], "w1");    g.line([26, 43], [25, 40], "w4");    g.pixel(27, 44, "w0");    if (festive) { g.pixel(25, 40, "b2"); g.pixel(26, 40, "b1"); g.pixel(24, 39, "b2"); }      // a blue ribbon wound on the grip  });  g.part("ferrule", () => { g.rect({ x: [23, 24], y: [35, 36] }, "n2", { fill: "n2" }); g.pixel(23, 35, "n4"); });  g.part("blade", () => g.sweep([[23.5, 34.5], [27, 31.5], [28.5, 27], [26, 23]], { w0: 1.3, w1: 0.45, profile: 0.8 }, (u, v) => {    if (v < -0.45) return "n5";                                           // honed inner edge catches the light    return v > 0.4 ? "n1" : u < 0.5 ? "n3" : "n2";  }));}// ---- drifting grains / loose stalks / chaff -----------------------------------------------------------------function grains(g, t, n, speed) {  g.detached("grains", () => {    for (let i = 0; i < n; i++) {      const p = (t * speed + i / n) % 1;      const x = Math.round(18 + i * 3 + p * 9 + Math.sin(TAU * (p + i * 0.3)) * 1.5), y = Math.round(12 + i * 2 + p * 26);      if (p > 0.85 || x > W - 1) continue;      g.pixel(x, y, p < 0.5 ? "g2" : "g1");    }  });}function looseStalks(g, t) {  // three whole stalks tumbling across on the wind (each one wraps from the right edge back to the left)  g.outlined("ink", () => g.part("looseStalks", () => {    for (let i = 0; i < 3; i++) {      const p = (t + i / 3) % 1;      const x = -9 + p * (W + 18), y = 7 + i * 10 + Math.sin(TAU * (p * 1.5 + i * 0.4)) * 3;      const a = TAU * (p + i * 0.3);                                    // end over end, once per crossing      const c = Math.cos(a), sn = Math.sin(a) * 0.7;      const s0 = [Math.round(x - c * 4), Math.round(y - sn * 4)], s1 = [Math.round(x + c * 1), Math.round(y + sn * 1)];      const e1 = [Math.round(x + c * 4), Math.round(y + sn * 4)];      g.line(s0, s1, "w3");      g.line(s1, e1, "g2");      g.line([s1[0], s1[1] - 1], [e1[0], e1[1] - 1], "g1");             // the plump head, two pixels thick      g.pixel(Math.round(x + c * 2.5), Math.round(y + sn * 2.5) - (Math.abs(c) > 0.5 ? 1 : 0), "g1");      g.pixel(e1[0], e1[1], "g3");    }  }));  g.detached("chaff", () => {    for (let i = 0; i < 4; i++) {                                         // short chaff streaks      const p = (t * 2 + i / 4) % 1;      const x = Math.round(-2 + p * (W + 4)), y = 5 + ((i * 11) % 34);      g.pixel(x, y, "w4"); g.pixel(x - 1, y, "g1");    }  });}// ---- festival dressing -----------------------------------------------------------------------------------------function star(g, t, bend) {  const c = [Math.round(centre(TOP, bend)), 6];  const spin = 0.12 * Math.sin(TAU * t);  g.outlined("ink", () => {    g.part("starStick", () => g.line([c[0], c[1] + 4], [Math.round(centre(TOP + 1, bend)), TOP - 3], "w3"));    g.part("star", () => {      for (let k = 0; k < 8; k++) {        const a = spin + (k * TAU) / 8 - Math.PI / 2, long = k % 2 === 0;        const r = long ? 5.6 : 3.8;        const tip = [Math.round(c[0] + Math.cos(a) * r), Math.round(c[1] + Math.sin(a) * r)];        const lit = L[0] * Math.cos(a) + L[1] * Math.sin(a);        g.line(c, tip, lit > 0.3 ? "g3" : lit > -0.3 ? "g2" : "g1");      }      // woven ring tying the straws      g.strokeEllipse({ x: [c[0] - 2, c[0] + 2], y: [c[1] - 2, c[1] + 2] }, "g1");      g.pixel(c[0] - 1, c[1] - 2, "g3"); g.pixel(c[0] + 2, c[1] + 1, "g0");      g.pixel(c[0], c[1], "r1");    });  });}function flowers(g) {  g.part("flowers", () => {    // poppies and cornflowers tucked under the ribbon    for (const [x, y] of [[18, WAIST - 2], [20, WAIST - 1]]) { g.pixel(x, y, "r2"); g.pixel(x + 1, y, "r1"); g.pixel(x, y - 1, "r3"); g.pixel(x + 1, y + 1, "ink"); }    for (const [x, y] of [[9, WAIST - 1], [15, WAIST - 3]]) { g.pixel(x, y, "b2"); g.pixel(x - 1, y, "b1"); g.pixel(x, y - 1, "b3"); }    g.pixel(17, WAIST - 3, "e2"); g.pixel(10, WAIST - 2, "e1");  });}function streamers(g, t) {  // a red and a blue streamer from the bow, two pixels wide, rippling as the breeze runs down them  g.outlined("ink", () => g.part("streamers", () => {    for (const [lit, dark, ph, x0, dir] of [["r2", "r1", 0, 10, -1], ["b2", "b1", 0.4, 14, 1]]) {      for (let i = 1; i <= 11; i++) {        const q = i / 11;        const wave = Math.sin(TAU * (t - q * 0.9 + ph));        const x = Math.round(x0 + dir * q * 2.5 + wave * 1.6 * q), y = WAIST + 1 + i;        const face = Math.cos(TAU * (t - q * 0.9 + ph)) > -0.2;          // the ribbon twists: lit face or back        g.pixel(x, y, face ? lit : dark); g.pixel(x + 1, y, face ? dark : (lit === "r2" ? "r0" : "b0"));      }    }  }));}// ---- assembly --------------------------------------------------------------------------------------------------function sheaf(g, t, cfg) {  contactShadow(g, CX, GROUND, 11, 2);  g.outlined("ink", () => stubble(g, cfg.gust, false));  crown(g, cfg.bend, cfg.sway);  g.outlined("ink", () => stalks(g, cfg.bend));  crownFront(g, cfg.bend, cfg.sway);  g.outlined("ink", () => { tie(g, cfg.flutter); });  if (cfg.festival) flowers(g);  g.outlined("ink", () => sickle(g, cfg.festival));  g.outlined("ink", () => stubble(g, cfg.gust, true));}const WheatSheaf = sprite(pal, (g, t, mode) => {  t = ((t % 1) + 1) % 1;  if (mode === "gust") {    const wob = Math.sin(TAU * 3 * t);                                  // fast flutter on a hard lean    const bend = 2 + Math.round(wob * 0.6);    sheaf(g, t, {      bend, gust: 1,      sway: (s) => 0.5 + 0.12 * Math.sin(TAU * 3 * t - s * 2) - s * 0.35 - Math.max(0, s) * 0.15,      flutter: (q, ph) => 2.2 + Math.sin(TAU * (3 * t - q + ph)) * 1.1,    });    looseStalks(g, t);    grains(g, t, 3, 2);    return;  }  const breeze = Math.sin(TAU * t);  const bend = Math.round(breeze * 1.1);  const cfg = {    bend, gust: breeze * 0.5,    sway: (s) => 0.13 * Math.sin(TAU * t - s * 1.3),    flutter: (q, ph) => Math.sin(TAU * (t - q * 0.8 + ph)) * 0.9,    festival: mode === "festival",  };  sheaf(g, t, cfg);  if (cfg.festival) { star(g, t, bend); streamers(g, t); }  else grains(g, t, 2, 1);});submit(WheatSheaf, {  size: [W, H], origin: "top-left", kind: "icon", scale: 1,  animate: { fps: 10, duration: N_IDLE / 10, loop: true },  anchor: { x: CX, y: GROUND },  args: ["idle"],  variants: [    { name: "idle", args: ["idle"] },    { name: "gust", args: ["gust"], animate: { fps: 10, duration: N_GUST / 10, loop: true } },    { name: "festival", args: ["festival"] },  ],});