public void Scan(float[,] _heightMap,int size,float waterLevel)
    {
        islandList.Clear();
        MakeDeepCopy(_heightMap);
       float minVal = CalculateMinVal(waterLevel);
        for(int i=0; i < size; i++)
            for (int j = 0; j < size; j++)
            {
                if (heightMap[i, j] >= minVal)
                {
                    islandPartsList.Add(new IslandNode(i,j, heightMap[i, j]));
                    heightMap[i, j] = 0;
                   newPos = FindNeighbour(i, j, minVal);
                    if (newPos.x != -1 && newPos.y != -1)
                    {
                        Next(newPos, minVal);
                        if(islandPartsList.Count > 10)
                            islandList.Add(new Island(islandPartsList));
                        islandPartsList.Clear();
                    }
                }
            }
    }

    private void Next(Vector2 pos, float minVal)
    {
        islandPartsList.Add(new IslandNode((int)pos.x,(int)pos.y, heightMap[(int)pos.x, (int)pos.y]));
        heightMap[(int)pos.x, (int)pos.y] = 0;
        for (int i = 0; i < 3; i++)
        {
             newPos = FindNeighbour((int)pos.x, (int)pos.y, minVal);
            if (newPos.x != -1 && newPos.y != -1)
            {
                Next(newPos,minVal);
            }
        }

    }