{ "genart": "1.2", "id": "wind-in-the-barley", "title": "Wind in the Barley", "created": "2026-09-10T00:00:00Z", "modified": "2026-09-10T19:31:32.540Z", "renderer": { "type": "canvas2d", "version": "1.x" }, "canvas": { "width": 1400, "height": 1000 }, "parameters": [], "colors": [], "dataChannels": [ { "name": "crop1", "type": "vector", "cols": 400, "rows": 300 }, { "name": "crop2", "type": "vector", "cols": 400, "rows": 300 }, { "name": "crop3", "type": "vector", "cols": 400, "rows": 300 }, { "name": "crop4", "type": "vector", "cols": 400, "rows": 300 }, { "name": "ears", "type": "vector", "cols": 400, "rows": 300 }, { "name": "near", "type": "vector", "cols": 400, "rows": 300 }, { "name": "hedge", "type": "vector", "cols": 400, "rows": 300 }, { "name": "hedge-base", "type": "vector", "cols": 400, "rows": 300 }, { "name": "rut", "type": "vector", "cols": 400, "rows": 300 } ], "state": { "seed": 2287, "params": {}, "colorPalette": [ "#2b1a12", "#5c3320", "#8a5a3c", "#c9a982", "#ece3d4" ] }, "algorithm": "// Wind in the Barley — field generation only. This code makes NO marks.\n// It publishes a tone map and a stalk-direction map on the ADR 062 data\n// bridge; every line in the picture is drawn by a plugin layer that reads them.\n//\n// Two rules govern the plate, the same two that govern Quarry Face:\n// the direction of a hatch = the lean of the stalks it describes\n// the density of a hatch = how far that crop is turned from the light\n//\n// The subject is the wind, which cannot be drawn. What can be drawn is what\n// the wind does to a crop: where a gust presses the barley over, the stalks\n// turn their sides up and the ears stop facing the viewer, and that patch goes\n// pale. Where the crop still stands, the eye looks down into it and it goes\n// dark. So the gusts are pale streaks running across a dark field, and their\n// shape is the shape of the air.\n//\n// Everything is computed on the ground plane and projected, so the gust bands\n// and the tramlines foreshorten and converge on one vanishing point instead of\n// being drawn as screen-space decoration.\nfunction sketch(ctx, state) {\n var W = state.canvas.width, H = state.canvas.height;\n var seed = state.seed || 0;\n\n ctx.fillStyle = state.colorPalette[4];\n ctx.fillRect(0, 0, W, H);\n\n // The field grid scales with the canvas so a cell stays the same size in\n // pixels. Holding it fixed softens every mask edge as the plate grows.\n var COLS = Math.round(200 * W / 700), ROWS = Math.round(150 * H / 500);\n\n function rngFrom(a) {\n return function () {\n a |= 0; a = a + 0x6D2B79F5 | 0;\n var t = Math.imul(a ^ a >>> 15, 1 | a);\n t = t + Math.imul(t ^ t >>> 7, 61 | t) ^ t;\n return ((t ^ t >>> 14) >>> 0) / 4294967296;\n };\n }\n var rand = rngFrom(seed * 2654435761 + 12345);\n var ph = [];\n for (var i = 0; i < 24; i++) ph.push(rand() * Math.PI * 2);\n\n /** A lattice of random values, bilinearly sampled. Used only to give the\n * crop its crookedness: a barley stalk is not a ruled line, and a field of\n * ruled lines is the one thing that would give the whole plate away. */\n function lattice(nx, ny) {\n var v = new Float32Array(nx * ny);\n for (var k = 0; k < nx * ny; k++) v[k] = rand() * 2 - 1;\n return function (u, t) {\n // 🔴 Clamp. A sample outside [0,1] indexes past the lattice, and the\n // undefined it returns becomes a NaN direction in a published channel.\n // The flow-line stepper then walks to a NaN position, whose bounds check\n // passes (every comparison with NaN is false), and dies indexing\n // samples[NaN] — reported as \"Cannot read properties of undefined\n // (reading 'dx')\" on a frame the CLI still exits 0 for.\n if (u < 0) u = 0; else if (u > 1) u = 1;\n if (t < 0) t = 0; else if (t > 1) t = 1;\n var x = u * (nx - 1), y = t * (ny - 1);\n var x0 = Math.floor(x), y0 = Math.floor(y);\n var x1 = x0 + 1 > nx - 1 ? nx - 1 : x0 + 1, y1 = y0 + 1 > ny - 1 ? ny - 1 : y0 + 1;\n var fx = x - x0, fy = y - y0;\n fx = fx * fx * (3 - 2 * fx); fy = fy * fy * (3 - 2 * fy);\n var a = v[y0 * nx + x0], b = v[y0 * nx + x1], c = v[y1 * nx + x0], d = v[y1 * nx + x1];\n return (a + (b - a) * fx) * (1 - fy) + (c + (d - c) * fx) * fy;\n };\n }\n // Every lattice is indexed in [0,1], so its features are a fixed fraction of\n // the plate and scale with it. Resolutions are therefore literals, and the\n // seeded picture is the same picture at any canvas size.\n var clump = lattice(17, 13); // stalks lean together in patches\n var splay = lattice(61, 47); // and the awns splay inside a patch\n var edge = lattice(53, 41); // used to break binary mask boundaries\n var nod = lattice(97, 73); // how each ear nods off its own stalk\n // 🔴 The one that stops the field reading as combed fur. A smooth jitter\n // coarser than the spacing between lines bends every neighbour by the same\n // amount, so they stay parallel and the crop turns into a pelt. This one is\n // finer than the line spacing, so adjacent stalks genuinely disagree.\n var kink = lattice(151, 113);\n // One dither lattice per plate pass, at four different resolutions. A pass\n // covers a hard-edged region and a hard edge shows as a contour drawn across\n // the crop, so each threshold is jogged cell by cell and its boundary breaks\n // into stipple. They have to be four DIFFERENT lattices: share one and the\n // four boundaries jog together, land on top of each other and resolve back\n // into the single hard contour the dither was there to destroy.\n var dith = [lattice(83, 63), lattice(79, 59), lattice(89, 67), lattice(73, 55)];\n\n // --- The ground -------------------------------------------------------\n var hv = 0.150 + rand() * 0.048; // the skyline\n // Kept off centre. A vanishing point in the middle with a tramline pair\n // straddling it turns the plate into a symmetrical funnel.\n var vpU = (rand() < 0.5 ? 0.15 + rand() * 0.18 : 0.67 + rand() * 0.18);\n var XK = 1.15; // ground units visible per unit depth\n // 🔴 How far back the viewer stands, in the same units as a gust wavelength.\n // At 1 the near edge of the plate is right at the viewer's feet, and because\n // perspective makes the visible width proportional to the distance, the whole\n // foreground then falls inside a third of one gust and can only be a single\n // flat mass however the tone is graded. Standing back puts more of the plate\n // at the distances where the wind is legible, which is why a landscape is\n // almost never drawn from the ground at one's own feet.\n var DNEAR = 2.6;\n var DMAX = DNEAR * 24;\n // A gust band is a line of constant phase on the ground. At windTh = PI/2 it\n // runs directly away from the viewer and converges at the vanishing point;\n // at 0 it lies flat across the view as a horizontal stripe, which reads as\n // depth banding rather than as weather. So it stays near PI/2, tilted just\n // far enough that the gusts cross the tramlines at a shallow angle.\n var windTh = 1.15 + rand() * 0.34;\n var wSin = Math.sin(windTh), wCos = Math.cos(windTh);\n // Which way the crop is pushed on the sheet. One direction only: the wind\n // does not change its mind inside a single plate.\n var leanSign = rand() < 0.5 ? -1 : 1;\n\n // The tramline: one pair of wheelings, laid by a machine, running to the\n // vanishing point. It is the only straight thing in the picture and the only\n // evidence of a person.\n // In ground units, so they hold their real width however far back the\n // viewer stands.\n var tramX = (rand() * 2 - 1) * 0.55 * DNEAR;\n var gauge = (0.26 + rand() * 0.09) * DNEAR;\n var rutW = (0.019 + rand() * 0.009) * DNEAR;\n\n // The hedge that closes the field. Its top edge is the only drawing in the\n // upper third, so it carries the whole horizontal, and it is not a strip of\n // even height. It is bushed up in places, thin in\n // others, and somewhere along it one thing has been let grow into a tree —\n // which is the only vertical accent in the upper third and the thing that\n // gives the horizon a scale.\n var treeU = 0.13 + rand() * 0.74;\n function hedgeTop(u) {\n var body = 0.026\n + 0.024 * (0.5 + 0.5 * Math.sin(u * 2.3 + ph[0]))\n + 0.017 * (0.5 + 0.5 * Math.sin(u * 5.9 + ph[1]))\n + 0.010 * (0.5 + 0.5 * Math.sin(u * 17.1 + ph[6]))\n + 0.006 * (0.5 + 0.5 * Math.sin(u * 41.3 + ph[9]));\n // One tree, not two, and tall and narrow rather than broad: a pair of\n // broad ones sat on the horizon as a pair of hills. Built from three\n // overlapping lobes, because a single bell curve is a cone and reads as a\n // haystack.\n var tree = 0.098 * Math.exp(-Math.pow((u - treeU) * 30.0, 2))\n + 0.062 * Math.exp(-Math.pow((u - treeU + 0.021) * 41.0, 2))\n + 0.052 * Math.exp(-Math.pow((u - treeU - 0.026) * 36.0, 2));\n return hv - (body + tree);\n }\n\n var tone = new Float32Array(COLS * ROWS);\n var dir = new Float32Array(COLS * ROWS);\n var nearMask = new Float32Array(COLS * ROWS);\n var hedgeTone = new Float32Array(COLS * ROWS);\n var hedgeDir = new Float32Array(COLS * ROWS);\n var hedgeBase = new Float32Array(COLS * ROWS);\n var rutTone = new Float32Array(COLS * ROWS);\n var rutDir = new Float32Array(COLS * ROWS);\n\n for (var r2 = 0; r2 < ROWS; r2++) {\n for (var c = 0; c < COLS; c++) {\n var u = c / (COLS - 1), v = r2 / (ROWS - 1);\n var idx = r2 * COLS + c;\n\n var ht = hedgeTop(u);\n if (v < ht) continue; // sky: bare paper\n\n var HB = hv + 0.012; // the foot of the hedge\n if (v < HB) {\n // The hedge is solid at its base and open at the top, where the last\n // growth stands separately against the sky. Filled to a hard edge it\n // reads as a dark strip laid across the plate — a bar, not a hedge —\n // so the crown thins out and only the body below is continuous. The\n // break-up runs across three scales at once: one coarse lattice alone\n // decides the whole width of the tree with a single value and fills it\n // in as a solid mound, and the finer ones cut that mound into branches.\n var f = (v - ht) / Math.max(0.004, HB - ht);\n var solid = (f - 0.02) / 0.30; if (solid > 1) solid = 1; else if (solid < 0) solid = 0;\n if (0.5 + 0.16 * clump(u, f) + 0.15 * splay(u, f) + 0.11 * nod(u, f) <= solid) {\n // Foliage has no single direction, so its marks are thrown wide. That\n // scatter is the difference between a hedge and a wall, and it is the\n // only place in the plate where direction is not reporting the lean\n // of something.\n hedgeTone[idx] = 1;\n hedgeDir[idx] = -Math.PI / 2 + 1.30 * kink(u, v) + 0.70 * splay(u, v) + 0.40 * clump(u, v);\n // The base of a hedge, in its own shadow over the ditch, is the\n // darkest thing on the horizon. It gets a second covering for the\n // same reason the crop's troughs do: tone is built by returning.\n if (f > 0.48) hedgeBase[idx] = 1;\n }\n }\n\n // Project the cell onto the ground plane. 🔴 This runs UNDER the hedge as\n // well as below it. Two binary masks that merely ABUT do not meet: the\n // renderer interpolates the field between grid cells, so along the shared\n // row both fall under the magnitude gate and neither draws, leaving a\n // bright hairline across the full width of the plate. Masks that touch\n // have to overlap.\n var rec = (v - hv) / (1 - hv); // 1 at the near edge, 0 at the skyline\n if (rec < DNEAR / DMAX) rec = DNEAR / DMAX; // at and above the skyline, as far as it goes\n var d = DNEAR / rec; // depth, DNEAR at the near edge\n var gx = (u - vpU) * d * XK;\n\n // The gust field, in ground coordinates so it foreshortens correctly.\n // A gust does not travel as a ruled stripe. Its front snakes, and it\n // breaks into patches along its own length, so the band is modulated by\n // the coordinate that runs across it as well as the one along it.\n var s = gx * wSin + d * wCos + 0.62 * Math.sin(d * 0.40 + ph[7]);\n var sPerp = gx * wCos - d * wSin;\n // Detail dissolves with distance. Without this the high-frequency terms\n // oscillate faster than the field grid can carry them near the skyline\n // and the far crop breaks into a moire that reads as corduroy.\n var hf = 1 / (1 + d * 0.16 / DNEAR);\n // Weighted so the broad sweep wins. Run the other way round, with the\n // gusts louder than the sweep, the plate fills with evenly sized stripes\n // and reads as corduroy: a texture, not weather. One large movement with\n // smaller ones inside it is both what wind on a crop looks like and the\n // only version of this that composes.\n var g = Math.sin(s * 1.45 + ph[3]) * 0.95 // the one broad sweep\n + Math.sin(s * 4.40 + ph[4]) * 0.52 * (0.35 + 0.65 * hf) // the gusts inside it\n + Math.sin(s * 9.80 + ph[5]) * 0.26 * hf; // and their fraying\n g /= 1.55;\n g *= 0.74 + 0.26 * Math.sin(sPerp * 0.72 + ph[8]);\n // You cannot make out one gust from another at the far side of a field,\n // and trying to draw them there squeezes several cycles into the few\n // grid rows left above the recession, which resolves as hard pale\n // rectangles rather than as weather. So the figure fades out into an\n // even grey before it reaches the hedge.\n g *= 0.68 + 0.32 * hf;\n // Pushed a little toward its limits so the plate has a settled range of\n // value whatever the seed. Left raw, the sum of sines rarely approaches\n // either end and the deepest pass finds almost nothing to cover: measured\n // at three seeds, under half a percent of the plate reached the fourth\n // threshold and the darks varied by a tenth between them. Pushed hard,\n // though, the figure goes bimodal, its edges harden into ridge lines and\n // the crop reads as dunes — so this is deliberately gentle.\n g = Math.tanh(g * 1.55);\n\n var pale = Math.pow(g > 0 ? g : 0, 1.30); // crests: crop pressed over, turned from the light\n var trough = Math.pow(g < 0 ? -g : 0, 1.25); // troughs: crop standing, looked into\n\n // Tone. The field itself is a middle value that only leans darker toward\n // the viewer, because the eye looks down into near crop and the far crop\n // closes up into one surface. The large swings belong to the wind: the\n // deepest darks are standing crop in the troughs and the paper is left\n // almost bare on the crests. Grading it the other way round, with the\n // recession carrying the range, produced a plate that was a black field\n // with weather in it somewhere.\n // Depth is carried by the SIZE of the marks, which the layers' own depth\n // scaling handles, so the tone map stays nearly flat from near to far and\n // spends its range on the wind instead. Grading it steeply with distance\n // made a plate that read as a dark bank rising out of a bright one.\n var T = 0.30 + 0.05 * Math.sqrt(rec);\n T -= 0.30 * pale;\n T += 0.32 * trough;\n\n // Lean. Strongest on the crest of a gust, never reversed.\n var lean = leanSign * (0.06 + 0.52 * (0.5 + 0.5 * g));\n var A = -Math.PI / 2 + lean + 0.15 * clump(u, v) + 0.13 * splay(u, v) + 0.23 * kink(u, v);\n\n // The tramline. Bare soil in the wheelings, and the crop at their edges\n // leans into the gap and stands against the light, so each rut is a pale\n // line with a dark lip — which is exactly how you see one from the gate.\n for (var t2 = -1; t2 <= 1; t2 += 2) {\n var dr = Math.abs(gx - (tramX + t2 * gauge));\n if (dr < rutW) {\n T = 0;\n // Wheelings and their ruts run to the vanishing point, so their few\n // marks are the only ones in the crop that lie down in perspective.\n rutTone[idx] = 1;\n var du = u - vpU, dv = v - hv;\n rutDir[idx] = Math.atan2(dv, du) + (du < 0 ? Math.PI : 0);\n } else if (dr < rutW * 2.2) {\n var f = 1 - (dr - rutW) / (rutW * 1.2);\n T += 0.32 * f * f;\n }\n }\n\n // 🔴 A floor, and it matters more than any other number here. Barley\n // pressed flat by a gust is PALER, not absent: the stalks are still\n // standing in it, they are just showing less of their own shadow. Let the\n // crests fall through the first pass and they become bare paper, and a\n // large ragged patch of bare paper in the middle of a field does not read\n // as wind, it reads as a hole. So the first pass covers all of the crop\n // and the whole wind figure is made by which of the LATER passes return\n // to a place. Only the wheelings, which really are bare, sit below this.\n if (rutTone[idx] === 0 && T < 0.19) T = 0.19;\n if (T < 0) T = 0; else if (T > 1) T = 1;\n tone[idx] = T;\n dir[idx] = A;\n\n // The near crop, drawn again with taller strokes so the foreground has\n // its own scale. A straight horizontal cut would show as a line across\n // the plate, so the boundary is broken by the same lattice that bends\n // the stalks.\n if (rec > 0.44 + 0.13 * edge(u, v) && rutTone[idx] === 0 && T >= 0.22) nearMask[idx] = 1;\n }\n }\n\n // --- Publish one field per plate pass ---------------------------------\n // An engraver builds value by returning to the plate, not by pressing\n // harder. Each pass covers only what is at least as dark as its threshold,\n // and sits a little off the last, so tone accumulates by crossing.\n // Set against the measured tone distribution, not by eye. The first is high\n // enough that the crests of the gusts fall below it and stay bare paper,\n // which is the whole of how the wind reads; the last is low enough that the\n // deepest crossing actually finds something to cover at every seed.\n var THRESHOLDS = [0.14, 0.30, 0.42, 0.53];\n // Wider than a quarry wall's, because barley genuinely splays: a bed of\n // stalks all within a few degrees of each other combs into a pelt, and the\n // crossing is what makes the dark read as ink rather than as shading.\n var SKEW = [0.10, -0.24, 0.32, -0.55];\n var g2 = (typeof globalThis !== 'undefined') ? globalThis : window;\n g2.__genart_data = g2.__genart_data || {};\n g2.__genart_data.cols = COLS;\n g2.__genart_data.rows = ROWS;\n\n function pack(name, mag, ang, skew) {\n var f32 = new Float32Array(COLS * ROWS * 3);\n for (var n = 0; n < COLS * ROWS; n++) {\n var a = ang[n] + (skew || 0);\n var m = mag[n];\n // One non-finite cell anywhere in a channel takes the whole render down,\n // so nothing unchecked is published. See the note in lattice().\n if (!isFinite(a)) a = -Math.PI / 2;\n if (!isFinite(m)) m = 0;\n f32[n * 3] = Math.cos(a);\n f32[n * 3 + 1] = Math.sin(a);\n f32[n * 3 + 2] = m;\n }\n g2.__genart_data[name] = f32;\n }\n\n // The jog is wide — a fifth of the whole tonal range — and runs at two\n // scales. This is the single thing that separates wind moving over a crop\n // from ploughed ridges: a gust has no edge, it frays out over a stretch of\n // ground several stalks deep, and a pass boundary cut at one tone contour\n // instead reads as the lip of a dune however the value is graded.\n for (var p = 0; p < THRESHOLDS.length; p++) {\n var m = new Float32Array(COLS * ROWS);\n for (var n2 = 0; n2 < COLS * ROWS; n2++) {\n var uu = (n2 % COLS) / (COLS - 1), vv = Math.floor(n2 / COLS) / (ROWS - 1);\n // The first pass is NOT jogged. It is the crop's own covering, it sits\n // under the whole field, and dithering it punches pale holes right\n // through the ground the other three are built on — which dapples the\n // field like a leopard instead of fraying the edges between passes.\n var th = p === 0 ? THRESHOLDS[0]\n : THRESHOLDS[p] + 0.075 * dith[p](uu, vv) + 0.032 * clump(uu, vv);\n m[n2] = tone[n2] >= th ? 1 : 0;\n }\n pack('crop' + (p + 1), m, dir, SKEW[p]);\n }\n // The ears are the one part of a barley plant that does not lie along the\n // stalk: they nod off it at every angle, and their scatter is what stops a\n // field reading as a pelt. Drawn very short and thrown wide of the lean.\n var earsMask = new Float32Array(COLS * ROWS);\n var earsDir = new Float32Array(COLS * ROWS);\n for (var e = 0; e < COLS * ROWS; e++) {\n earsMask[e] = tone[e] >= 0.26 ? 1 : 0;\n earsDir[e] = dir[e] + 0.62 * nod((e % COLS) / (COLS - 1), Math.floor(e / COLS) / (ROWS - 1));\n }\n pack('ears', earsMask, earsDir, 0);\n pack('near', nearMask, dir, 0);\n pack('hedge', hedgeTone, hedgeDir, 0);\n pack('hedge-base', hedgeBase, hedgeDir, -0.55);\n pack('rut', rutTone, rutDir, 0);\n}\n", "layers": [ { "id": "sheet", "type": "textures:paper", "name": "Sheet", "visible": true, "locked": false, "opacity": 1, "blendMode": "normal", "transform": { "x": 0, "y": 0, "width": 1400, "height": 1000, "rotation": 0, "scaleX": 1, "scaleY": 1, "anchorX": 0, "anchorY": 0 }, "properties": { "preset": "rough", "roughness": -1, "color": "#ece3d4", "seed": 2287 } }, { "id": "hedge", "type": "painting:flow-lines", "name": "Hedge — Field Boundary", "visible": true, "locked": false, "opacity": 1, "blendMode": "normal", "transform": { "x": 105, "y": 75, "width": 1190, "height": 810, "rotation": 0, "scaleX": 1, "scaleY": 1, "anchorX": 0, "anchorY": 0 }, "properties": { "field": "algorithm:hedge", "fieldCols": 400, "fieldRows": 300, "minMagnitude": 0.5, "seed": 2378, "lineCount": 34000, "seedDistribution": "grid-jittered", "lineLength": 7, "stepSize": 4, "lineWeight": 1.16, "lineWeightVariation": 0.34, "taper": "none", "color": "#2b1a12", "colorVariation": 0.07, "opacity": 0.36, "paintMode": "multiply", "depthScale": false, "horizonY": 0.18, "depthWeightRange": "[0.80, 1.08]", "depthOpacityRange": "[0.94, 1.00]", "maskCenterY": -1, "maskSpread": 0.25 } }, { "id": "hedge-base", "type": "painting:flow-lines", "name": "Hedge — Base and Ditch", "visible": true, "locked": false, "opacity": 1, "blendMode": "normal", "transform": { "x": 105, "y": 75, "width": 1190, "height": 810, "rotation": 0, "scaleX": 1, "scaleY": 1, "anchorX": 0, "anchorY": 0 }, 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