[Octave-bug-tracker] [bug #58376] Request for better looking tex superscripts and subscripts

[Rik]

Update of bug #58376 (project octave):

                  Status:         Patch Submitted => Fixed                  
             Open/Closed:                    Open => Closed                 

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Follow-up Comment #8:

This is a real nice improvement.  I reviewed the printed results from Latex
and the new Octave implementation by measuring the sizes and placement in
pixels.  Summary results are below.


Latex Superscript
------------------------------------------------------------
Size1 : 57
Size2 : 42  (42/57 = 74% of Size 1)
Size3 : 28  (28/42 = 67% of Size 2)

Placement

A1 : 0
A2 : +29 (or 28/57 = 49%)
A3 : +25 (or 25/42 = 60%) 


Latex Subscript
------------------------------------------------------------
Size1 : 57
Size2 : 42  (42/57 = 74% of Size 1)
Size3 : 28  (28/42 = 67% of Size 2)

Placement

A1 : 0
A2 : -12 (or 12/57 = -21%)
A3 : -8  (or 8/42 = -19%)) 

################################################################################

Octave Superscript
------------------------------------------------------------
Size1 : 59
Size2 : 42  (42/57 = 71% of Size 1)
Size3 : 30  (30/42 = 71% of Size 2)

Placement

A1 : 0
A2 : +33 (or 28/57 = 56%)
A3 : +23 (or 23/42 = 55%) 


Octave Subscript
------------------------------------------------------------
Size1 : 59
Size2 : 42  (42/57 = 74% of Size 1)
Size3 : 30  (28/42 = 67% of Size 2)

Placement

A1 : 0
A2 : -17 (or 17/59 = -29%)
A3 : -12  (or 12/42 = -29%)) 


Latex seems to vary the size of the font based on whether it is the first,
second, or presumably third superscript.  However, the *average* font size
decrease is 70% which matches what Pantxo programmed.  Similarly, the
superscript placement varies with whether it is the first, second, or third
superscript, but the *average* seems to be 55% which is what was programmed.

For subscripts, the sizing was the same.  Octave, however, was placing the
subscripts farther down at approximately -29% of fontsize versus -20% for
Latex.  I changed the yoffset to be -15% and this results in a measured
difference of -25% of fontsize which I think is a nice compromise.

I added a note in the NEWS file about the visual improvement and checked in
the patch here: https://hg.savannah.gnu.org/hgweb/octave/rev/6e8d5c99263c.

Marking as fixed and closing report.


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