protected override void InitFunction()
		{
			if (this.SourceType == SourceType.Equation)
			{
				_function = new Explicit3DFunction(this.Formula);
			}
			else
			{
//				BivariateFunctionnEvalutor evalutor = new BivariateFunctionnEvalutor();
//				evalutor.Text = this.CodeBody;
//				switch(this.CodeLanguage)
//				{
//					case CodeLanguage.CSharp:
//						evalutor.language= CodeLanguage.CSharp;
//						break;
//					case CodeLanguage.VBNET:
//						evalutor.language = CodeLanguage.VBNET;						
//						break;
//				}
//				_function = new Explicit3DFunction(new BivariateRealFunction(evalutor.Invoke));
				FunctionEvalutor evalutor = new FunctionEvalutor(this.CodeBody, new string[]{"x", "y"},this.CodeLanguage);
				_function = new Explicit3DFunction((BivariateRealFunction)evalutor.CreateDelegate(typeof(BivariateRealFunction)));

			}
		}
		public Explicit3DFunctionPlotter(Explicit3DFunction function)
		{	
			_function = function.ValueAt;
		}