Adding support for histogram in vtkScalarsToColorsItem
This adds the support for showing an Histogram in vtkScalarsToColorsItem
- Add an vtkPlotBar that can be created by calling SetHistogramTable
- Color it automatically when using vtkTransferFunctionItem
- Add an opacity control to vtkPlotBar
- Updates tests accordingly
Edited by Mathieu Westphal (Kitware)