Initial draft of the Modern SignWriting specification

[Steve Slevinski]

Hi Bill,

On 2/22/12 4:32 PM, Bill Reese wrote:
> That looks great Steve.  In the PDF, 7.D, "Horizontal Layout" (page 23 
> of 42), it says "Signs with head symbols are centered in the upper 
> head lane."  In the example, though, you just show signs that have 
> heads at the top and the heads are centered, not the whole sign.

Thanks for looking.  I need to add illustrations to section 7.B.3 
Center.  It states "If a SignBox contains head symbols, then the 
vertical center is the midpoint of the tight bounding box around the 
head symbols."


The signs above have their center marked by horizontal and vertical 
lines.  The first sign and the last sign are the same except for the 
heads.  The presence of the head symbol means a different centering rule 
needs to be applied to the sign itself.

If we look at the example of horizontal writing...


The first sign contains a head, which implies two things:
1) by section 7.B.3, the vertical center of the sign is the midpoint of 
the tight bounding box around the head symbols
2) by section 7.D, the center of the sign is aligned with the upper head 
lane

The second sign does not contain a head, which implies two things:
1) the center of the sign is the midpoint of the tight bounding box 
around all of the symbols
2) the center of the sign is aligned with the middle lane.

I hope that makes sense.  I will plane to add illustrations in section 
7.B.3 and try to add a better explanation to section 7.D.

Regards,
-Steve
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