.BG D
.VE $Header: /usr3/s/current/s/data/.help/RCS/font,v 1.2 83/12/30 23:08:44 rab Exp $
.FN font
.TL
font: Vector Drawn Fonts
.PP
The font datasets describe vector drawn characters which make
up sixteen different fonts.  Each font is known by a 2-character
name, e.g. "sr" for simplex roman.  The corresponding font dataset
is named "font.sr".
.NF
.ta 2.5i
Abbreviation	Font Name

cc	Complex Cyrillic
cg	Complex Greek
ci	Complex Italic
cr	Complex Roman
cs	Complex Script
dr	Duplex Roman
ge	Gothic English
gg	Gothic German
gi	Gothic Italian
ro	Roman (Constant Width)
sg	Simplex Greek
sp	Special Symbols
sr	Simplex Roman
ss	Simplex Script
ti	Triplex Italic
tr	Triplex Roman
.PP
These datasets are normally used by graphics functions which
have vector font capability.
The following information is not needed for the use of the fonts,
but may be helpful for constructing new fonts.
.PP
Fonts are digitized on a coordinate system centered at (0,0) and
ranging to at most 50 in all directions.
An em is 32 units.
Since the range of each coordinate is restricted, a single x or y
coordinate can be represented in one (ASCII) character.
Given an ASCII character, the coordinate value is found by taking
the integer character number and subtracting 77
("A" is 65 and thus represents coordinate \-12).
.PP
Fonts contain information for drawing the 95 ASCII characters
from space (32) to tilde (126).
Each font is a data structure with the following components:
.RC left
Character vector containing a single string of 95 characters giving the leftmost
coordinates of the characters in the font.
.RC right
Character vector giving rightmost coordinates.
.RC data
Character vector with one string for each of the 95 vector drawn characters
in the font.
Each string gives coordinate pairs used in drawing the character.
A tab character appearing in the string indicates that the pen should
be lifted at that point.
.SH SOURCE
Norman M. Wolcott and Joseph Hilsenrath,
.ul
A Contribution to Computer Typesetting Techniques,
"Tables of Coordinates for Hershey's Repertory of
Occidental Type Fonts and Graphics Symbols",
National Bureau of Standards Special Publication 424,
April 1976.
.KW dataset
.WR
