Re: [Plplot-devel] plpoin codes 92 and 95

[David M. <da...@as...>]

On Apr 7, 2010, at 15:19 , Alan W. Irwin wrote:

> On 2010-04-07 14:27-0700 David MacMahon wrote:
>
>> FWIW, I think PGPLOT maps the underscore to Hershey symbol 590.
>
> I confirmed that information with
>
> http://www.astro.caltech.edu/~tjp/pgplot/figb2.html
>
> That index position is empty with PLplot so that is the index  
> position I
> will adopt for underscore with PLplot as well.

I don't know much about the Hershey fonts, but I thought that the  
codes were predefined so that "590" would always be the same Hershey  
symbol.  Is that not true?  IOW, are the PGPLOT (or PLplot) Hershey  
codes specific to PGPLOT (or PLplot) rather than to Hershey fonts in  
general?

Here's what I think PGPLOT uses for the underscore's "coordinates"...

Bounding box...

miny, baseliney, maxy, minx, maxx = [-16, -9, 12, -9, 10]

Stroke (in same coordinate frame as bounding box)...

x1, y1, x2, y2 = [-9, -11, 9, -11]

Dave