feat: ledlab

presets/nebula-drift-preset.js

@@ -0,0 +1,81 @@
+// Nebula Drift preset for LEDLab
+
+const BasePreset = require('./base-preset');
+const { createFrame, frameToPayload, hexToRgb, samplePalette, toIndex, clamp } = require('./frame-utils');
+
+class NebulaDriftPreset extends BasePreset {
+  constructor(width = 16, height = 16) {
+    super(width, height);
+    this.timeSeconds = 0;
+    this.paletteStops = [
+      { stop: 0.0, color: hexToRgb('100406') },
+      { stop: 0.25, color: hexToRgb('2e0f1f') },
+      { stop: 0.5, color: hexToRgb('6a1731') },
+      { stop: 0.7, color: hexToRgb('b63b32') },
+      { stop: 0.85, color: hexToRgb('f48b2a') },
+      { stop: 1.0, color: hexToRgb('ffe9b0') },
+    ];
+    this.defaultParameters = {
+      primarySpeed: 0.15,
+      secondarySpeed: 0.32,
+      waveScale: 0.75,
+      brightness: 1.0,
+    };
+  }
+
+  layeredWave(u, v, speed, offset) {
+    return Math.sin((u * 3 + v * 2) * Math.PI * this.getParameter('waveScale') + this.timeSeconds * speed + offset);
+  }
+
+  renderFrame() {
+    this.timeSeconds += 0.016; // Assume 60 FPS
+
+    const frame = createFrame(this.width, this.height);
+    const brightness = this.getParameter('brightness') || 1.0;
+
+    for (let row = 0; row < this.height; ++row) {
+      const v = row / Math.max(1, this.height - 1);
+      for (let col = 0; col < this.width; ++col) {
+        const u = col / Math.max(1, this.width - 1);
+        const primary = this.layeredWave(u, v, this.getParameter('primarySpeed') || 0.15, 0);
+        const secondary = this.layeredWave(v, u, this.getParameter('secondarySpeed') || 0.32, Math.PI / 4);
+        const tertiary = Math.sin((u + v) * Math.PI * 1.5 + this.timeSeconds * 0.18);
+
+        const combined = 0.45 * primary + 0.35 * secondary + 0.2 * tertiary;
+        const envelope = Math.sin((u * v) * Math.PI * 2 + this.timeSeconds * 0.1) * 0.25 + 0.75;
+        const value = clamp((combined * 0.5 + 0.5) * envelope, 0, 1);
+
+        let color = samplePalette(this.paletteStops, value);
+
+        // Apply brightness
+        if (brightness < 1.0) {
+          const rgb = hexToRgb(color);
+          color = Math.round(rgb.r * brightness).toString(16).padStart(2, '0') +
+                  Math.round(rgb.g * brightness).toString(16).padStart(2, '0') +
+                  Math.round(rgb.b * brightness).toString(16).padStart(2, '0');
+        }
+
+        frame[toIndex(col, row, this.width)] = color;
+      }
+    }
+
+    return frame;
+  }
+
+  getMetadata() {
+    return {
+      name: 'Nebula Drift',
+      description: 'Organic drifting nebula with layered wave patterns',
+      parameters: {
+        primarySpeed: { type: 'range', min: 0.05, max: 0.3, step: 0.05, default: 0.15 },
+        secondarySpeed: { type: 'range', min: 0.2, max: 0.5, step: 0.02, default: 0.32 },
+        waveScale: { type: 'range', min: 0.5, max: 1.0, step: 0.05, default: 0.75 },
+        brightness: { type: 'range', min: 0.3, max: 1.0, step: 0.1, default: 1.0 },
+      },
+      width: this.width,
+      height: this.height,
+    };
+  }
+}
+
+module.exports = NebulaDriftPreset;