Animate Following Playback Progress / Bairui Su

Creative generation toolmaker, believe that today's tool help shape tomorrow’s art. Creator Charming.js. Author @antv/g2@5.x.

Public

Edited

Feb 1

{

const svg = cm.svg;

const url = await FileAttachment("pink.wav").url();

const sound = new Tone.Player(url).toDestination();

const player = usePlayer(sound);

const [vars, dispose] = cm

.flow()

.let("progress", 0)

.on("keydown", () => player.start())

.on("loop", (d) => (d.progress = player.progress()))

.join();

function usePlayer(player) {

let startTime;

const start = (...params) => {

startTime = params[0] ?? Tone.now();

player.start(...params);

};

const progress = () => {

if (player.state !== "started") return 0;

const currentTime = Tone.now() - startTime;

return currentTime / player._buffer.duration;

};

return { start, progress };

}

await Tone.loaded;

invalidation.then(() => dispose());

return svg.svg({ width, height: 100 }, [

svg.rect({ x: 0, y: 0, width, height: 100, fill: "black" }),

svg.circle({

cx: cm.$(() => cm.map(vars.progress, 0, 1, 0, width)),

cy: 50,

r: 40,

fill: "white"

})

]);

}

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