+ BBTK_INPUT(TransferFunctionView,In,"Input image",vtkImageData*,"");
+ BBTK_OUTPUT(TransferFunctionView,OpacityFunction,"Transfer function for the opacity", vtkPiecewiseFunction*,"");
+ BBTK_OUTPUT(TransferFunctionView,ColorFunction,"Transfer function for the color", vtkColorTransferFunction*,"");
+ BBTK_OUTPUT(TransferFunctionView,WindowLevel,"WidowLevel for the current window", double,"");
+ BBTK_OUTPUT(TransferFunctionView,ColorLevel,"ColorLevel for the current window", double,"");
+ BBTK_OUTPUT(TransferFunctionView,Active,"Active", bool,"");
+ /*BBTK_OUTPUT(TransferFunctionView,GreyLevel,"Greylevel related to the transparency",std::vector<double>,"");
+ BBTK_OUTPUT(TransferFunctionView,Value,"Value of the transparency in the transfer function",std::vector<double>,"");
+ BBTK_OUTPUT(TransferFunctionView,GreyLevelColors,"Grey level of the color in the transfer function",std::vector<double>,"");
+ BBTK_OUTPUT(TransferFunctionView,Red,"Red value according to the GreyLevelColors",std::vector<double>,"");
+ BBTK_OUTPUT(TransferFunctionView,Green,"Green value according to the GreyLevelColors",std::vector<double>,"");
+ BBTK_OUTPUT(TransferFunctionView,Blue,"Blue value according to the GreyLevelColors",std::vector<double>,"");*/