memo

gistfile1.cs

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

public class Command : MonoBehaviour
{

    enum InputStatus
    {
        None,
        Up,
        Down,
        Left,
        Right,
        UpRight,
        UpLeft,
        DownRight,
        DownLeft,
        A_Button,
        B_Button
    }

    void Start()
    {
	
        var horizontalObservable = Observable.EveryUpdate().Select(_ => Input.GetAxisRaw("Horizontal"));
        var verticalObservable = Observable.EveryUpdate().Select(_ => Input.GetAxisRaw("Vertical"));
        var joystickObservable = Observable.Zip(horizontalObservable, verticalObservable, (h, v) =>
            {
                return ConvertVector2ToInputStatus(new Vector2(h, v));
            })
            .DistinctUntilChanged()
            .Where(x => x != InputStatus.None);

        var AButtonObservable = Observable.EveryUpdate().Where(_ => Input.GetButtonDown("A Button")).Select(_ => InputStatus.A_Button);
        var BButtonObservable = Observable.EveryUpdate().Where(_ => Input.GetButtonDown("B Button")).Select(_ => InputStatus.B_Button);

        Observable
            .Merge(AButtonObservable, BButtonObservable, joystickObservable);
    }

    InputStatus ConvertVector2ToInputStatus(Vector2 input)
    {
        if (input.sqrMagnitude <= 0.01f)
        {
            return InputStatus.None;
        }

        var normalizedInput = input.normalized;

        if (Vector2.Angle(normalizedInput, Vector2.up + Vector2.right) <= 45)
        {
            return InputStatus.UpRight;
        }
        if (Vector2.Angle(normalizedInput, Vector2.up - Vector2.right) <= 45)
        {
            return InputStatus.UpLeft;
        }
        if (Vector2.Angle(normalizedInput, -Vector2.up + Vector2.right) <= 45)
        {
            return InputStatus.DownRight;
        }
        if (Vector2.Angle(normalizedInput, -Vector2.up - Vector2.right) <= 45)
        {
            return InputStatus.DownLeft;
        }
        if (Vector2.Angle(normalizedInput, Vector2.up) <= 45)
        {
            return InputStatus.Up;
        }
        if (Vector2.Angle(normalizedInput, -Vector2.up) <= 45)
        {
            return InputStatus.Down;
        }
        if (Vector2.Angle(normalizedInput, Vector2.right) <= 45)
        {
            return InputStatus.Right;
        }
        if (Vector2.Angle(normalizedInput, -Vector2.right) <= 45)
        {
            return InputStatus.Left;
        }

        return InputStatus.None;
    }


  
}