LongPressSample

using UnityEngine;
using System.Collections;
using UniRx;
using UniRx.Triggers;
using System.Linq;
using System;

public class LongPressSample : MonoBehaviour
{
    public float chargePower = 1;
    public float chargeBase = 1;
    public float chargeMax = 6;
    public GameObject spawner;
    // Use this for initialization
    void Start()
    {
        spawner = GameObject.Find("TestSpawner");
        var fire1Stream = this.UpdateAsObservable()
            .Where(_ => Input.GetButton("Fire1"));
        var fire1DownStream = this.UpdateAsObservable()
            .Where(_ => Input.GetButtonDown("Fire1"));
        var fire1UpStream = this.UpdateAsObservable()
            .Where(_ => Input.GetButtonUp("Fire1"));
        fire1DownStream.Subscribe(_ => chargePower = 1);
        var fire1ChargeStream = fire1Stream.Select(_ => Time.deltaTime)
                                           .Scan((prev, next) => prev + next)
                                           .TakeUntil(fire1UpStream)
                                           .RepeatUntilDestroy(this)
                                           .Skip(1)
                                           .Where(x => x > 1);
        fire1ChargeStream.Subscribe(x => chargePower = Mathf.Min(chargeBase + x, chargeMax));
        fire1UpStream.Subscribe(_ =>    {
                                            spawner.SendMessage("SpawnObject", chargePower);
                                            chargePower = 1f;
                                        });
    }
}