If we draw the TH3D with “box” options, the boxes which would represent bins with values <SetMinimum() value are not drawn. However, if the same TH3D is drawn with “glbox” options, all boxes are drawn, regardless of the SetMinimum() (and probably SetMaximum()). I suspect this may be a bug. I attach the script demonstrating the issue - drawing the same histogram in two canvases before and after SetMinimum(). To toggle between open-gl and “standard”, please modify the “draw_gl” variable at the 2nd line of the script.
glmin.C (558 Bytes)
In addition, “glcol” also does not respect SetMinimum(). Maybe here it is more difficult, but it would definitely make a lot of things easier, if parts of the TH3D below SetMinimum() value were completely transparent automatically (or disregarded in some other way).
ROOT Version: 6.18
Platform: Fedora 31
Compiler: Not Provided