Re: Braille scores

[Jacques Menu]

Thanks Aaron, that makes things clear.

A nice day!

JM

> Le 17 oct. 2018 à 21:58, Aaron Hill <address@hidden> a écrit :
> 
> On 2018-10-17 11:35 am, Jacques Menu wrote:
>> Last questions : in a programming language a C or Python, what should
>> one write as character strings to obtain the code for example Example
>> 1.8.1-1, and what font or tool should one use to get it displayed as
>> shown in the PDF doc?
> 
> Braille can be easily represented as a 6-bit or 8-bit value, depending on 
> whether you need the fourth row.  Unicode supports Braille and has allocated 
> code points 2800-28FF for this purpose.  This follows the scheme where each 
> dot corresponds to a particular bit in the byte, where dot "1" (upper-left) 
> is the least significant, and dot "8" (lower-right) the most significant.  
> This means the basic three-row Braille are mapped to 2800-283F.
> 
> Ideally, a font will support the Unicode standard so the code points will 
> render appropriately, but some fonts may have been created before the code 
> points were allocated.  In these cases, there can be some variation in the 
> mapping scheme.  Braille symbols may be mapped to numerals and digits in a 
> natural fashion rather than in the Unicode binary scheme.  This may be easier 
> for end-users, but it presents a challenge for computers.  You are best off 
> using a look-up table in that case.
> 
> Most fonts that I have found online only show a visual indicator for the 
> raised dots.  However, you can find a few fonts that include outlines as 
> well.  But Braille should be easy enough to render manually without needing a 
> font.  Just make sure to do the research on the correct sizing and spacing.
> 
> -- Aaron Hill
> 
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