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1.1 root 1: Jun 18, 1991:
2:
3: Lower | to match parens.
4:
5: Dec, 1990:
6:
7: Converted to ANSI C. Alea iacta est.
8:
9: Nov 11, 1989:
10:
11: Print diacriticals in font 1 regardless.
12:
13: Apr 28, 1989:
14:
15: Made some of the float tuning parameters accessible
16: through define. (Subbase & Supshift). Not very systematic
17: naming or direction conventions.
18:
19: Added version identification output via -d.
20:
21: Apr 20, 1989:
22:
23: Fixed bug that caused excess inter-character spaces
24: in bold xxx, etc.
25:
26: Re-did sqrt to generate radical with a more accurate size.
27: (i hope -- tuned for postscript.)
28:
29: Mar 89:
30:
31: Lots of fiddling to get detailed character spacing better,
32: assuming times roman on postscript printers. a digram
33: class table in text.c does most of it; more fiddles in
34: eqnbox.c and shift.c. Not much attempt to make this stuff
35: independent of typesetter, so it may break on other output
36: devices.
37:
38: Tab is now just another white space character. This rescinds
39: the original botch that made it something to be printed.
40:
41: Preliminary steps taken to getting rid of neqn; "ndefine" is
42: now the only vestige in the code, for compatibility.
43:
44:
45: Sept 88:
46:
47: Default TYPESETTER is post.
48:
49: Changed positioning rules for sqrts to be a lot
50: better for postscript.
51:
52: Changed positioning rules for built-up brackets:
53: if the enclosed thing has a base that's more than
54: 1/2 em away from its center, the thing is just
55: centered, rather than lined up.
56:
57: More tuning parameters added.
58:
59: Fixed up to go through cyntax without substantive complaint.
60:
61: Apr 87:
62:
63: Made some of the tuning parameters visible as
64: defined strings:
65: hat_def: string to draw the hat in x hat
66: also vec, tilde, dot, dotdot, utilde
67: sum, prod, inter, union, int
68:
69: moved a bunch of fixed values out into tuning.c
70: as compile-time parameters.
71:
72: Dec 85:
73:
74: The following is a quick synopsis of changes
75: to eqn since the last version.
76: Most of these changes owe thanks to Mary Carter,
77: whose efforts during the summer of 1984 provided
78: the impetus to start thinking about eqn again.
79:
80: 1. Fixed long-standing bug involving nested
81: from-to constructs.
82:
83: 2. Output guaranteed to preserve font that was
84: in effect upon entry (if there are no font changes
85: within quoted strings).
86:
87: 3. The right delimiter is no longer significant
88: within display equations.
89:
90: 4. Macros with arguments, as in grap and pic.
91: Parentheses are treated somewhat differently:
92: If an embedded left paren is found in a token,
93: then the characters to its left are checked to
94: see if they are a macro name. If they are, the
95: paren is assumed to mark the beginning of the
96: argument list. Otherwise, the token is treated
97: just like any other.
98:
99: 5. File inclusion: include (or copy) "filename"
100: is replaced by contents of file. .EQ and .EN are
101: ignored within inclusions. Filename "-" is a synonym for
102: standard input on the command line.
103:
104: 6. Font names can be given as strings, as in
105: font CW { ... } or gfont CW
106:
107: 7. Checks environment variable TYPESETTER; default
108: is still 202.
109:
110: 8. An optional separation distance can be specified
111: for a pile or col: lcol 33 {... above ...} adds 33/100 em
112: of separation between the elements instead of the default;
113: negative values permitted.
114: pile, etc., have become synonyms for col, etc.
115:
116: 9. Eqn attempts to print appropriately for current size,
117: obviating the need for most uses of size {...} and gsize.
118: It won't always be right, but it will be close for documents
119: printed in the usual range of sizes.
120:
121: 10. A fair amount of fiddling has been done to details of
122: positioning; the output seems to be better looking.
123:
124: 11. ifdef whatever / is replaced by this if defined /
125: The proper TYPESETTER name is defined already.
126:
127: 12. Error messages are somewhat better as well. Errors
128: passed on to troff will be identified by source file and
129: line number in the eqn input.
130:
131: 13. Tunable parameters have been (mostly) collected into
132: a single file, tuning.c, to make it easier to adapt eqn
133: to a new typesetter.
134:
135: 14. As an interim fix, "lowbar" and "highbar" are synonymous
136: with "bar", but force the bar to be either low (as over x)
137: or high (as over X) regardless of the apparent height of
138: the object. This copes with {x sub 1} bar.
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