Angstrom symbol refuses to render correctly using TLatex

ROOT
1

I am trying to make a plot where the axis label includes the symbol for Angstrom #AA. This symbol keeps getting rendered as the symbol for “approximately equal”, namely #approx. This macro used to work with ROOT 5.34.25 which is the version I had installed. I tried 6.06 but it doesn’t help. There must be something screwy on my MAC with rendering stuff from the Symbol font. Other symbols such as Greek letters are okay, although I haven’t done an exhaustive check. Any suggestions.

Thanks Liz

2

Yes you are right. I just check. That’s only on screen with the Cocoa version of ROOT . If you use the X11 version or save the image as PDF it is OK. We will look into that.

3

So I am using XQuartz on MAC 10.9.5 and I built from source. If I save it as PDF then I also see the symbol correctly but not if I save as a PNG file and not on the screen.

By the way, on a completely unrelated note. ROOT 6.06 does not pick up changes to a script if I edit it and then rerun it. I have to quit the session. Unloading it doesn’t seem to work.

Liz

4

By default on mac when you build ROOT the cocoa backend is used. This has the problem. To use the Quartz backend you should configure root with cmake using -Dcocoa=OFF -Dx11=ON options. We are now looking at this problem for cocoa. Obfully it will be fixed soon.

When you have a new question it is better to make a new post otherwise the forum becomes very confusing.
Any way this is a known issue: sft.its.cern.ch/jira/browse/ROOT-7858

5

Now fixed. Thanks to have seen it.

6

Thanks. Is there a fixed version that I can download?

Liz
7

ROOT 6 master.

8

If you install ROOT from source I can send you the few line to add.

9

Yes I did so that would be very useful.

Thanks Liz

10

in $ROOTSYS/graf2d/graf/src/TLatex.cxx search for the text string “Angstrom” and replace:

      if(opSpec == 75 || opSpec == 76) {
         newSpec.fFont = GetTextFont();
         if (opSpec == 75) letter = '\305'; // AA Angstroem
         if (opSpec == 76) letter = '\345'; // aa Angstroem
      }

by:

      if(opSpec == 75 || opSpec == 76) {
         newSpec.fFont = GetTextFont();
         if (gVirtualX->InheritsFrom("TGCocoa")) {
            if (opSpec == 75) letter = '\201'; // AA Angstroem
            if (opSpec == 76) letter = '\214'; // aa Angstroem
         } else {
            if (opSpec == 75) letter = '\305'; // AA Angstroem
            if (opSpec == 76) letter = '\345'; // aa Angstroem
         }
      }