Jerry
82 lines
2.7 KiB
JavaScript
82 lines
2.7 KiB
JavaScript
const GLSL = `
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float sdSegment(vec3 p, vec3 a, vec3 b) {
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vec3 pa = p - a;
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vec3 ba = b - a;
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float h = clamp(dot(pa, ba) / max(dot(ba, ba), 0.0001), 0.0, 1.0);
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return length(pa - ba * h);
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}
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float smoothMin(float a, float b, float k) {
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float h = clamp(0.5 + 0.5 * (b - a) / max(k, 0.0001), 0.0, 1.0);
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return mix(b, a, h) - k * h * (1.0 - h);
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}
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vec3 moorePoint(float i) {
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float row = floor(i / 6.0);
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float col = mod(i, 6.0);
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if (mod(row, 2.0) > 0.5) {
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col = 5.0 - col;
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}
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vec2 planar = (vec2(col, row) - vec2(2.5)) * spacing;
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float z = sin(i * 1.57079632679) * verticalWave;
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return vec3(planar, z);
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}
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float sdf(vec3 p) {
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float d = 100000.0;
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for (int i = 0; i < 35; i += 1) {
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float fi = float(i);
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d = smoothMin(d, sdSegment(p, moorePoint(fi), moorePoint(fi + 1.0)), bendBlend);
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}
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d = smoothMin(d, sdSegment(p, moorePoint(35.0), moorePoint(0.0)), bendBlend);
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return d - tubeRadius;
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}
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vec3 color(vec3 p, vec3 normal) {
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float ring = atan(p.y, p.x) * 0.15915494309 + length(p.xy) * 0.018;
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float band = 0.5 + 0.5 * sin(ring * 6.28318530718 + p.z * 0.25);
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vec3 c = mix(baseColor, accentColor, band);
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return c * (0.58 + 0.42 * smoothstep(-0.4, 0.9, normal.z));
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}
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`;
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export default {
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schema: "implicit.js/0.1.0",
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name: "Moore curve loop",
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description: "A closed Moore space-filling loop rendered as a continuous rounded tube.",
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units: "mm",
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params: {
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spacing: { type: "number", label: "Cell spacing", min: 4, max: 9, step: 0.1, default: 6.2, unit: "mm" },
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tubeRadius: { type: "number", label: "Tube radius", min: 0.4, max: 2.5, step: 0.05, default: 1.05, unit: "mm" },
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bendBlend: { type: "number", label: "Bend blend", min: 0.1, max: 2.4, step: 0.05, default: 0.72, unit: "mm" },
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verticalWave: { type: "number", label: "Vertical wave", min: 0, max: 5, step: 0.1, default: 1.4, unit: "mm" },
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baseColor: { type: "color", label: "Cool color", default: "#38d9ff" },
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accentColor: { type: "color", label: "Hot color", default: "#ff7ab6" }
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},
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animations: {
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loopWave: {
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label: "Loop wave",
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duration: 5.2,
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loop: true,
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update({ progress, set }) {
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const wave = Math.sin(progress * Math.PI * 2);
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set("verticalWave", 1.4 + (wave * 0.5 + 0.5) * 3.2);
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set("tubeRadius", 1.05 + wave * 0.26);
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}
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}
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},
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bounds: ({ params }) => {
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const extent = params.spacing * 3.2 + params.tubeRadius + 5;
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const z = params.verticalWave + params.tubeRadius + 5;
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return [[-extent, -extent, -z], [extent, extent, z]];
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},
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render: ({ params }) => ({
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steps: 210,
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stepScale: 0.66,
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maxStep: Math.max(params.tubeRadius * 3.4, 1.2),
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epsilon: Math.max(params.tubeRadius * 0.013, 0.005),
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normalEpsilon: Math.max(params.tubeRadius * 0.075, 0.035)
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}),
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glsl: GLSL
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};
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