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status_hilite for Xp and Exp by percent rules

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Extend support for highlight rules that specify percentages from HP
and spell power to experience level and experience points.  For both
of those, the percentage is based on progress from the start of the
current Xp level to the start of the next Xp level.  100% isn't
possible so is used to enable highlighting a special case:  1 point
shy of next level, most likely to occur after losing a level.

This is something I had in mind a long time ago and then forgot all
about until fiddling with the final disclosure of experience points
recently.  It turned out to be trickier than expected because it needs
to check whether Xp should have a status update when it hasn't changed
but Exp has gone up.  The latter might hit a percentage threshold that
switches to another highlight rule.  Fortunately changes to Exp, at
least that aren't part of level gain or loss (which always trigger
status updating), are all funnelled through a single place (I hope).
This commit is contained in:
PatR
2019-07-02 17:39:23 -07:00
parent ad88205229
commit 1e7fb839a3
6 changed files with 165 additions and 29 deletions
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19
doc/Guidebook.tex
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@@ -4773,7 +4773,24 @@ it also matches when value is below or above the percentage.
Use prefix `{\tt <}' or `{\tt >}' to match when strictly below or above.
(The numeric limit is relaxed slightly for those: {\tt >-1\%}
and {\tt <101\%} are allowed.)
Only valid for ``{\it hitpoints\/}'' and ``{\it power\/}'' fields.
Only four fields support percentage rules.
Percentages for ``{\it hitpoints\/}'' and ``{\it power\/}'' are
straightforward; they're based on the corresponding maximum field.
Percentage highlight rules are also allowed for ``{\it experience level\/}''
and ``{\it experience points\/}'' (valid when the
(\it showexp\/}
option is enabled).
For those, the percentage is based on the progress from the start of
the current experience level to the start of the next level.
So if level 2 starts at 20 points and level 3 starts at 40 points,
having 30 points is 50\% and 35 points is 75\%.
100\% is unattainable for experience because you'll gain a level and
the calculations will be reset for that new level, but a rule for
{\tt =100\%} is allowed and matches the special case of being
exactly 1 experience point short of the next level.
% (If you manage to reach level 30, there is no next level and the
% percentage will remain at 0\% no matter have many additional experience
% points you earn.)
%.lp "*"
\item{\bb{}}
absolute value sets the attribute when the field value