Пример #1
0
    public Drop SelectDropRandomly()
    {
        //For Unit Test if description is empty drop nothing
        if (drops.Length == 0)
        {
            return(null);
        }

        for (int i = 0; i < drops.Length; i++)
        {
            //select an random item out of array, so that the drop rates are correct and the order doesn't matter
            int rndIndex = Random.Range(0, drops.Length);

            float rnd = Random.value;
            DropProbabilityPair pair = drops[rndIndex];

            if (rnd < pair.Probability)
            {
                return(pair.Drop);
            }
        }

        //to an ensure that always omething is droped -> drop an random item out of array
        return(drops[Random.Range(0, drops.Length)].Drop);
    }
Пример #2
0
    public Drop SelectDropRandomly()
    {
        float total = 0;

        // sum up drop probabilities
        for (int i = 0; i < drops.Length; i++)
        {
            DropProbabilityPair pair = drops[i];
            total += pair.Probability;
        }

        float rnd  = Random.Range(0, total);
        float curr = 0;

        for (int i = 0; i < drops.Length; i++)
        {
            DropProbabilityPair pair = drops[i];

            if (rnd < (curr + pair.Probability))
            {
                return(pair.Drop);
            }
            else
            {
                curr += pair.Probability;
            }
        }
        return(null);
    }
    public void TestDropHalfHalfDistribution()
    {
        var lootTable = ScriptableObject.CreateInstance <LootDescription>();
        var dropOne   = ScriptableObject.CreateInstance <Drop>();
        var dropTwo   = ScriptableObject.CreateInstance <Drop>();

        var pairOne = new DropProbabilityPair();

        pairOne.Drop        = dropOne;
        pairOne.Probability = .5f;

        var pairTwo = new DropProbabilityPair();

        pairTwo.Drop        = dropTwo;
        pairTwo.Probability = .5f;

        DropProbabilityPair[] pair = { pairOne, pairTwo };

        lootTable.SetDrops(pair);


        for (int i = 0; i < 100; i++)
        {
            Drop drop = lootTable.SelectDropRandomly();
            Assert.IsNotNull(drop);
        }
    }
    public void TestThatOrderIsIrrelevant()
    {
        var lootTable         = ScriptableObject.CreateInstance <LootDescription>();
        var lootTableSwitched = ScriptableObject.CreateInstance <LootDescription>();
        var dropOne           = ScriptableObject.CreateInstance <Drop>();
        var dropTwo           = ScriptableObject.CreateInstance <Drop>();

        dropOne.DropName = "One";
        dropTwo.DropName = "Two";

        var pairOne = new DropProbabilityPair();

        pairOne.Drop        = dropOne;
        pairOne.Probability = .1f;

        var pairTwo = new DropProbabilityPair();

        pairTwo.Drop        = dropTwo;
        pairTwo.Probability = .9f;

        DropProbabilityPair[] pair         = { pairOne, pairTwo };
        DropProbabilityPair[] pairSwitched = { pairTwo, pairOne };

        lootTable.SetDrops(pair);
        lootTableSwitched.SetDrops(pairSwitched);
        Drop[] resultOne      = new Drop[1000];
        Drop[] resultSwitched = new Drop[1000];

        for (int i = 0; i < 1000; i++)
        {
            resultOne[i]      = lootTable.SelectDropRandomly();
            resultSwitched[i] = lootTableSwitched.SelectDropRandomly();
        }

        int rOneCount = 0, rSwitchedCount = 0;

        foreach (Drop drop in resultOne)
        {
            if (drop.DropName == "One")
            {
                rOneCount++;
            }
        }
        foreach (Drop drop in resultSwitched)
        {
            if (drop.DropName == "One")
            {
                rSwitchedCount++;
            }
        }

        Assert.GreaterOrEqual(rOneCount, 80);
        Assert.GreaterOrEqual(rSwitchedCount, 80);
        Assert.LessOrEqual(rOneCount, 130);
        Assert.LessOrEqual(rSwitchedCount, 130);
    }
    public Drop SelectDropRandomly()
    {
        for (int i = 0; i < drops.Length; i++)
        {
            float rnd = Random.value;
            DropProbabilityPair pair = drops[i];

            if (rnd < pair.Probability)
            {
                return(pair.Drop);
            }
        }
        return(null);
    }