diff options
Diffstat (limited to 'doc/context/sources/general/manuals/luametatex/luametatex-math.tex')
| -rw-r--r-- | doc/context/sources/general/manuals/luametatex/luametatex-math.tex | 52 |
1 files changed, 39 insertions, 13 deletions
diff --git a/doc/context/sources/general/manuals/luametatex/luametatex-math.tex b/doc/context/sources/general/manuals/luametatex/luametatex-math.tex index 37926c8ab..1da49b455 100644 --- a/doc/context/sources/general/manuals/luametatex/luametatex-math.tex +++ b/doc/context/sources/general/manuals/luametatex/luametatex-math.tex @@ -830,8 +830,8 @@ $\Ustack {a \over b}$ \stoptyping The \prm {Ustack} command will scan the next brace and start a new math group -with the correct (numerator) math style. The \prm {ustackstyle} relates to this -feature. +with the correct (numerator) math style. The \prm {mathstackstyle} primitive +relates to this feature. \stopsubsection @@ -1040,6 +1040,8 @@ undefined will get presets, quite likely zero): \NC \prm {Umathflattenedaccentbottomshiftdown} \NC the amount that a wide bottom accent is shifted down \NC \NR \NC \prm {Umathdelimiterpercent} \NC \NC \NR \NC \prm {Umathdelimitershortfall} \NC \NC \NR +\NC \prm {Umathradicalextensiblebefore} \NC \NC \NR +\NC \prm {Umathradicalextensibleafter} \NC \NC \NR \stoptabulate These relate to the font parameters and in \CONTEXT\ we assign some different @@ -1557,16 +1559,17 @@ The original \TEX\ engine has primitives like \prm {mathord} and a limited set o possible atoms. In \LUAMETATEX\ we have many more built in and you can add more. It will take a while before we have documented all the new math features and more details can be found in the manuals that come with \CONTEXT\ for which all this -was implemented. In addition to \prm {mathord}, \prm {mathop}, \prm {mathbin}, -\prm {mathrel}, \prm {mathopen}, \prm {mathclose}, \prm {mathpunct} and \prm -{mathinner} we have \prm {mathfrac}, \prm {mathrad}, \prm {mathmiddle}, \prm -{mathaccent}, \prm {mathfenced}. \prm {mathghost} and the existing \prm -{underline} and \prm {overline} class driven atoms. +was implemented. In addition to \prm {mathordinary} (aka \prm {mathord}), \prm +{mathoperator} (aka \prm {mathop}), \prm {mathbinary} (aka \prm {mathbin}), \prm +{mathrelation} (aka \prm {mathrel}), \prm {mathopen}, \prm {mathclose}, \prm +{mathpunct} and \prm {mathinner} we have \prm {mathfraction}, \prm {mathradical}, +\prm {mathmiddle}, \prm {mathaccent}, \prm {mathfenced}. \prm {mathghost} and the +existing \prm {underline} and \prm {overline} class driven atoms. The \prm {mathatom} primitive is the generic one and it accepts a couple of keywords: -\starttabulate[|cT|l|] +\starttabulate[|lT|l|l|] \DB keyword \BC argument \NC meaning \NC \NR \TB \NC attr \NC int int \NC attributes to be applied to this atom \NC \NR @@ -1842,7 +1845,7 @@ supports two delimiters. \topicindex {math+radicals} \topicindex {math+delimiters} -This new primitive is like \prm {Rooted} in that it takes two delimiters but it +This new primitive is like \prm {Urooted} in that it takes two delimiters but it takes no degree and no rule is drawn. \starttyping @@ -2264,7 +2267,16 @@ get the length of the last line, the following will often work too: \stopsection -\startsection[title={Math mode}] +\startsection[title={Math mode and scripts}] + +\startsubsection[title={Entering and leaving math mode with \prm {Ustartmathmode} +and \prm {Ustopmathmode}}] + +These commands are variants on the single and double (usually) dollar signs that +make us enter math mode and later leave it. The start command expects a style +identifier that determines in what style we end up in. + +\stopsubsection \startsubsection[title={Verbose versions of single|-|character math commands like \prm {Usuperscript} and \prm {Usubscript}}] @@ -2528,6 +2540,17 @@ Watch how the spacing changes: \getbuffer \stoplines +The \TEX\ engines deal with active characters in math differently as in text. +When a character has class~8 it will be fed back into the machinery with an +active catcode which of course assumes that there is some meaning attached. + +A variant on this is the use of \prm {amcode}. A character that has that code set +and that is active when we are in math mode, will be fed back with that code as +catcode which can be one of alignment tab, superscript, subscript, letter, other +char, or active. This feature is still experimental. Watch out: when an already +active character remains active we get a loop. Also, math characters are checked +for this property too, which can then turn them active. + \stopsubsection \startsubsection[title={Checking class states}] @@ -2768,10 +2791,12 @@ probably more qualifies as a feature specific for that usage. \DB value \BC meaning \NC \NR \TB \NC 0x01 \NC obey stretch component \NC \NR -\NC 0x02 \NC obey shrink component \NC \NR +\NC 0x02 \NC obey shrink component \NC \NR \LL \stoptabulate +\stopsubsection + \stopsection \startsection[title={Experiments}] @@ -2894,8 +2919,6 @@ You'll notice that we apply more severe penalties at the edges: \stopsubsection -\stopsection - \startsubsection[title={\prm {Umathdiscretionary} and \prm {hmcode}}] \topicindex {math+discretionaries} @@ -2928,6 +2951,9 @@ So we can say: \stoptyping When the \type {italic} bit is set italic correction is kept at a linebreak. +\stopsubsection + +\stopsection \stopchapter |