98 lines
2.7 KiB
JavaScript
98 lines
2.7 KiB
JavaScript
const dgram = require('dgram');
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const {
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createFrame,
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frameToPayload,
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hexToRgb,
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samplePalette,
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toIndex,
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} = require('./shared-frame-utils');
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const DEFAULT_PORT = 4210;
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const DEFAULT_WIDTH = 16;
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const DEFAULT_HEIGHT = 16;
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const DEFAULT_INTERVAL_MS = 55;
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const 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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const host = process.argv[2];
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const port = parseInt(process.argv[3] || String(DEFAULT_PORT), 10);
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const width = parseInt(process.argv[4] || String(DEFAULT_WIDTH), 10);
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const height = parseInt(process.argv[5] || String(DEFAULT_HEIGHT), 10);
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const intervalMs = parseInt(process.argv[6] || String(DEFAULT_INTERVAL_MS), 10);
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if (!host) {
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console.error('Usage: node spiral-bloom.js <device-ip> [port] [width] [height] [interval-ms]');
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process.exit(1);
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}
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if (Number.isNaN(port) || Number.isNaN(width) || Number.isNaN(height) || Number.isNaN(intervalMs)) {
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console.error('Invalid numeric argument. Expected integers for port, width, height, and interval-ms.');
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process.exit(1);
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}
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if (width <= 0 || height <= 0) {
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console.error('Matrix dimensions must be positive integers.');
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process.exit(1);
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}
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const socket = dgram.createSocket('udp4');
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const isBroadcast = host === '255.255.255.255' || host.endsWith('.255');
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const frame = createFrame(width, height);
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let rotation = 0;
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let hueShift = 0;
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const frameTimeSeconds = intervalMs / 1000;
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if (isBroadcast) {
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socket.bind(() => {
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socket.setBroadcast(true);
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});
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}
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socket.on('error', (error) => {
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console.error('Socket error:', error.message);
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});
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function generateFrame() {
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rotation += frameTimeSeconds * 0.7;
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hueShift += frameTimeSeconds * 0.2;
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const cx = (width - 1) / 2;
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const cy = (height - 1) / 2;
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const radiusNorm = Math.hypot(cx, cy) || 1;
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for (let row = 0; row < height; ++row) {
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for (let col = 0; col < 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(5 * (angle + rotation) + hueShift * Math.PI * 2);
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const value = Math.min(1, radius * 0.8 + arm * 0.4);
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frame[toIndex(col, row, width)] = samplePalette(paletteStops, value);
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}
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}
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return frameToPayload(frame);
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}
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function sendFrame() {
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const payload = generateFrame();
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const message = Buffer.from(payload, 'utf8');
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socket.send(message, port, host);
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}
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setInterval(sendFrame, intervalMs);
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console.log(
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`Streaming spiral bloom to ${host}:${port} (${width}x${height}, interval=${intervalMs}ms)`,
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);
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