seed | ランダム数生成器を初期化するのに使用するシード値 |
シード値を指定し、ランダム数生成器の状態を初期化します。
乱数生成は真にランダムでなく事前に決まった順番で番号を生成します(値の順番はほとんどの場合に問題ない形の乱数となります)。
乱数の値の選択は シード と呼ばれる値で選択されます。関数が使用される前のシステム時刻など任意の値からセットされます。これによりゲームが再生される度に同じ値が実行されて毎回同じゲームプレイとなることを避けます。しかし自身でシードをセットすることで同じ乱数の値を生成することが役に立つ場合もあります。
You might set your own seed, for example, when you generate a game level procedurally. You can use randomly-chosen elements to make the Scene look arbitrary and natural but set the seed to a preset value before generating. This will make sure that the same "random" pattern is produced each time the game is played. This can often be an effective way to reduce a game's storage requirements - you can generate as many levels as you like procedurally and store each one using nothing more than an integer seed value.
using UnityEngine; using System.Collections;
public class ExampleClass : MonoBehaviour { private float[] noiseValues; void Start() { Random.InitState(42); noiseValues = new float[10]; for (int i = 0; i < noiseValues.Length; i++) { noiseValues[i] = Random.value; Debug.Log(noiseValues[i]); } } }
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