Using Task In Unity

Preface

I was trying make a simple vfx and wondering how to update model without using Monobehaviour Update() function.

If you watch the video carefully model’s scale has been changed repeatedly.

Basically by passing cancellationToken we can run a async task and able to stop it.

    public void SpawnAndPlay(Transform pos)
    {
        GameObject.Instantiate(ParticleEffect, pos);
        cts = new CancellationTokenSource();
        CancellationToken ct = cts.Token;

        ModelAnimation(pos, ct);
    }

    public async void ModelAnimation(Transform pos, CancellationToken ct)
    {
        await Task.Delay(TimeSpan.FromSeconds(6));
        var go = GameObject.Instantiate(Model, pos);
        cat = go;

        while (!ct.IsCancellationRequested)
        {
            await Task.Delay(TimeSpan.FromSeconds(.2f), ct);

            if (!ct.IsCancellationRequested) ScaleUP(go, ct);
        }

        await Task.Delay(TimeSpan.FromSeconds(2));
    }

    private void ScaleUP(GameObject go, CancellationToken ct)
    {
        go.transform.localScale += (new Vector3(1, 1, 1) / 2f);

        if (go.transform.localScale.x >= 5)
        {
            cts.Cancel();
        }
    }

In the code above, we will scale up the model every .2f and when the localScale.x reaches 5, cancellation token will be called.

By doing this we don’t need to use Update()

Source From

• https://stackoverflow.com/questions/4890915/is-there-a-task-based-replacement-for-system-threading-timer/23814733#23814733

Summary

Nomenclature