クラスのデータをJsonにして、StreamingAssetフォルダに保存するやつ

SaveData.cs

using UnityEngine;

using System.IO;
using System.Collections;

public class SaveData : MonoBehaviour
{
	public int data1;
	public float data2;
	public string data3;
	public Vector3[] points;

	// Use this for initialization
	void Start ()
	{
		LoadJsonFile (this);
	}
	
	// Update is called once per frame
	void Update ()
	{
		if (Input.GetMouseButtonDown (0))
			SaveJsonFile (this);
	}

	public static void LoadJsonFile (Object overwriteTarget, string filePath = "appData.json")
	{
		var path = Path.Combine (Application.streamingAssetsPath, filePath);
		if (File.Exists (path))
			JsonUtility.FromJsonOverwrite (File.ReadAllText (path), overwriteTarget);
	}

	public static void SaveJsonFile<T> (T obj, string filePath = "appData.json")
	{
		var json = JsonUtility.ToJson (obj);
		var path = Path.Combine (Application.streamingAssetsPath, filePath);
		var dPath = Path.GetDirectoryName (path);
		if (!Directory.Exists (dPath))
			Directory.CreateDirectory (dPath);

		using (var writer = new StreamWriter (path))
			writer.Write (json);
	}
}