#Unity3D

GetWaveCrest.cs

public static class ExtensionTools
{    
    private static void ScanPeak(float[] arr, int length, float[] pvlst)
    {
        for (int i = 1; i < length - 1; i++)
        {
            if ((arr[i] < arr[i - 1]) && (arr[i] < arr[i + 1]))
            {
                pvlst[i] = -1;
            }
            else if ((arr[i] > arr[i - 1]) && (arr[i] > arr[i + 1]))
            {
                pvlst[i] = 1;
            }
        }

        if (arr[0] < arr[1])
        {
            pvlst[0] = -1;
        }
        else if (arr[0] > arr[1])
        {
            pvlst[0] = 1;
        }

        if (arr[length - 1] < arr[length - 2])
        {
            pvlst[length - 1] = -1;
        }
        else if (arr[length - 1] > arr[length - 2])
        {
            pvlst[length - 1] = 1;
        }
    }

    private static WaveCrestData MaxNeighboringPeak(float[] arr, int length)
    {
        float[] pvlst = new float[length];

        int peak = 0;
        int vall = 0;
        float pair = 0;
        float max = 0;

        Array.Clear(pvlst, 0, pvlst.Length);

        ScanPeak(arr, length, pvlst);

        for (int i = 0; i < length; i++)
        {
            if (pvlst[i] == 1)
            {
                peak = i;
                pair++;
            }

            if (pvlst[i] == -1)
            {
                vall = i;
                pair++;
            }

            if (2 == pair)
            {
                pair = 0;
                if (arr[peak] - arr[vall] > max)
                    max = arr[peak] - arr[vall];
            }
        }
        
        WaveCrestData result = new WaveCrestData();

        result.Pvlst = pvlst.ToList();
        result.Max = max;

        return result;
    }

    public static WaveCrestData GetWaveCrest(this List<float> data)
    {
        int length = Buffer.ByteLength(data.ToArray()) / Marshal.SizeOf(data[0]);

        return MaxNeighboringPeak(data.ToArray(), length);
    }
}