82 lines
2.7 KiB
JavaScript
82 lines
2.7 KiB
JavaScript
// Spiral Bloom preset for LEDLab
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const BasePreset = require('./base-preset');
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const { createFrame, frameToPayload, hexToRgb, samplePalette, toIndex } = require('./frame-utils');
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class SpiralBloomPreset extends BasePreset {
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constructor(width = 16, height = 16) {
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super(width, height);
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this.rotation = 0;
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this.hueShift = 0;
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this.paletteStops = [
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{ stop: 0.0, color: hexToRgb('051923') },
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{ stop: 0.2, color: hexToRgb('0c4057') },
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{ stop: 0.45, color: hexToRgb('1d7a70') },
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{ stop: 0.7, color: hexToRgb('39b15f') },
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{ stop: 0.88, color: hexToRgb('9dd54c') },
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{ stop: 1.0, color: hexToRgb('f7f5bc') },
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];
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this.defaultParameters = {
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rotationSpeed: 0.7,
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hueSpeed: 0.2,
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spiralArms: 5,
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brightness: 1.0,
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};
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}
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renderFrame() {
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this.rotation += 0.016 * (this.getParameter('rotationSpeed') || 0.7);
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this.hueShift += 0.016 * (this.getParameter('hueSpeed') || 0.2);
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const frame = createFrame(this.width, this.height);
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const brightness = this.getParameter('brightness') || 1.0;
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const spiralArms = this.getParameter('spiralArms') || 5;
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const cx = (this.width - 1) / 2;
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const cy = (this.height - 1) / 2;
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const radiusNorm = Math.hypot(cx, cy) || 1;
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for (let row = 0; row < this.height; ++row) {
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for (let col = 0; col < this.width; ++col) {
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const dx = col - cx;
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const dy = row - cy;
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const radius = Math.hypot(dx, dy) / radiusNorm;
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const angle = Math.atan2(dy, dx);
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const arm = 0.5 + 0.5 * Math.sin(spiralArms * (angle + this.rotation) + this.hueShift * Math.PI * 2);
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const value = Math.min(1, radius * 0.8 + arm * 0.4);
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let color = samplePalette(this.paletteStops, value);
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// Apply brightness
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if (brightness < 1.0) {
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const rgb = hexToRgb(color);
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color = Math.round(rgb.r * brightness).toString(16).padStart(2, '0') +
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Math.round(rgb.g * brightness).toString(16).padStart(2, '0') +
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Math.round(rgb.b * brightness).toString(16).padStart(2, '0');
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}
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frame[toIndex(col, row, this.width)] = color;
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}
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}
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return frame;
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}
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getMetadata() {
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return {
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name: 'Spiral Bloom',
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description: 'Rotating spiral patterns blooming outward',
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parameters: {
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rotationSpeed: { type: 'range', min: 0.3, max: 1.5, step: 0.1, default: 0.7 },
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hueSpeed: { type: 'range', min: 0.1, max: 0.5, step: 0.05, default: 0.2 },
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spiralArms: { type: 'range', min: 3, max: 8, step: 1, default: 5 },
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brightness: { type: 'range', min: 0.3, max: 1.0, step: 0.1, default: 1.0 },
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},
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width: this.width,
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height: this.height,
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};
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}
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}
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module.exports = SpiralBloomPreset;
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