Unityエディタ上で出現率、発生率を設定出来るプログラム

SetIncidenceSample.cs

using System.Collections;
using System.Collections.Generic;
using System.Linq;
using UnityEngine;

public class SetIncidenceSample : MonoBehaviour {

	[SerializeField]
	int monster1Incidence;

	[SerializeField]
	int monster2Incidence;

	[SerializeField]
	int monster3Incidence;

	string [] monsterNames = { "スライム", "ゴブリン", "ドラゴン" };

	// Use this for initialization
	void Start () {
		print (GetRandomMonsterName ());
	}
	
	// Update is called once per frame
	void Update () {
		
	}

	string GetRandomMonsterName () {
		var incidenceDistoribution = GetIncidenceDistributionList (monster1Incidence, monster2Incidence, monster3Incidence);

		int rdm = Random.Range (0, incidenceDistoribution.Count);
		return monsterNames [incidenceDistoribution [rdm]];
	}

	List<int> GetIncidenceDistributionList (params int [] incidences) {
		var incidenceList = new List<int> ();

		int gcd = GCD (incidences);

		for (int i = 0, len = incidences.Length; i < len; i++) {
			int incidence = incidences [i] / gcd;

			for (int j = 0; j <= incidence; j++) {
				incidenceList.Add (i);
			}
		}
		return incidenceList;
	}

	int GCD (int [] numbers) {
		return numbers.Aggregate (GCD);
	}

	int GCD (int a, int b) {
		return b == 0 ? a : GCD (b, a % b);
	}
}