Sparse channels

Source: examples/sparse-channels.ts

Uses RecordingTransport so you can run it without opening UDP sockets. Shows transition with different durations, then a short fadeChannels on one channel. Unmentioned channels keep their existing targets.

import { createSacnSource } from "@helioslx/core";
import { RecordingTransport } from "@helioslx/core/testing";

const source = createSacnSource({
  transport: new RecordingTransport(),
  ownsTransport: true,
});

const universe = source.universe(1);

try {
  await universe.transition([
    { channel: 1, value: 255, durationMs: 1_000 },
    { channel: 10, value: 64, durationMs: 2_000 },
    { channel: 512, value: 128, durationMs: 3_000 },
  ]);

  await universe.fadeChannels({ 1: 0 }, { durationMs: 250 });

  console.info(await universe.get());
} finally {
  await source.close();
}

Related: Writing output.