These define typesafe coordinates used by RPad to identify which coordinate system a coordinate is referring to The origin (0,0) is in the RPad's bottom left corner for all of them. 
| Classes | |
| struct | ROOT::Experimental::RPadLength::Normal | 
| A normalized coordinate.  More... | |
| struct | ROOT::Experimental::RPadLength::Pixel | 
| A pixel coordinate.  More... | |
| struct | ROOT::Experimental::RPadLength::User | 
| A user coordinate.  More... | |