82 lines
2.9 KiB
JavaScript
82 lines
2.9 KiB
JavaScript
// Nebula Drift preset for LEDLab
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const BasePreset = require('./base-preset');
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const { createFrame, frameToPayload, hexToRgb, samplePalette, toIndex, clamp } = require('./frame-utils');
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class NebulaDriftPreset extends BasePreset {
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constructor(width = 16, height = 16) {
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super(width, height);
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this.timeSeconds = 0;
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this.paletteStops = [
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{ stop: 0.0, color: hexToRgb('100406') },
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{ stop: 0.25, color: hexToRgb('2e0f1f') },
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{ stop: 0.5, color: hexToRgb('6a1731') },
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{ stop: 0.7, color: hexToRgb('b63b32') },
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{ stop: 0.85, color: hexToRgb('f48b2a') },
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{ stop: 1.0, color: hexToRgb('ffe9b0') },
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];
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this.defaultParameters = {
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primarySpeed: 0.15,
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secondarySpeed: 0.32,
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waveScale: 0.75,
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brightness: 1.0,
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};
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}
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layeredWave(u, v, speed, offset) {
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return Math.sin((u * 3 + v * 2) * Math.PI * this.getParameter('waveScale') + this.timeSeconds * speed + offset);
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}
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renderFrame() {
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this.timeSeconds += 0.016; // Assume 60 FPS
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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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for (let row = 0; row < this.height; ++row) {
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const v = row / Math.max(1, this.height - 1);
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for (let col = 0; col < this.width; ++col) {
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const u = col / Math.max(1, this.width - 1);
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const primary = this.layeredWave(u, v, this.getParameter('primarySpeed') || 0.15, 0);
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const secondary = this.layeredWave(v, u, this.getParameter('secondarySpeed') || 0.32, Math.PI / 4);
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const tertiary = Math.sin((u + v) * Math.PI * 1.5 + this.timeSeconds * 0.18);
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const combined = 0.45 * primary + 0.35 * secondary + 0.2 * tertiary;
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const envelope = Math.sin((u * v) * Math.PI * 2 + this.timeSeconds * 0.1) * 0.25 + 0.75;
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const value = clamp((combined * 0.5 + 0.5) * envelope, 0, 1);
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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: 'Nebula Drift',
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description: 'Organic drifting nebula with layered wave patterns',
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parameters: {
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primarySpeed: { type: 'range', min: 0.05, max: 0.3, step: 0.05, default: 0.15 },
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secondarySpeed: { type: 'range', min: 0.2, max: 0.5, step: 0.02, default: 0.32 },
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waveScale: { type: 'range', min: 0.5, max: 1.0, step: 0.05, default: 0.75 },
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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 = NebulaDriftPreset;
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