void Start()
    {
        pollutantMaterialManager = UIManager.Instance.pollutantMaterialManager;

        Clear();

        pollutantMaterialManager = FindObjectOfType <PollutantMaterialManager>();

        CanvasPieChart canvasPieChart = pie as CanvasPieChart;

        canvasPieChart.PieClicked.AddListener(OnPieClick);
    }
 void Start()
 {
     pie = GetComponent <PieChart>();
     if (pie)
     {
         pie.DataSource.Clear();
     }
     pieAnimation    = GetComponent <PieAnimation>();
     materialManager = FindObjectsOfType <PollutantMaterialManager>()[0];
     sum             = GetComponentInChildren <Text>();
     if (sum)
     {
         sum.text = "";
     }
 }