%%% File: whats.new
%%% A part of mfpic 0.6b 2003/01/02
%%%
What's new since mfpic 0.6
--------------------------
    -- Prior to 0.6, blank lines in mfpic environments were ignored. In
       0.6 they weren't, in 0.6a something closer to the old behavior
       was restored.
    -- There was an embarassing bug in the definition of sinh in
       both grafbase files. The sign was reversed from what it should
       be. Corrected in 0.6b.

What's new since mfpic 0.5
--------------------------

    -- \tlabel will now accept the following syntax under mplabels:
         \tlabel[vh<rot>]{<pair>}{<text>}
       where <pair> is any pair expression acceptable to MetaPost. The
       same is true of most other label-like constructs. The old syntax
       can still be used:
         \tlabel[vh<rot>](<x>,<y>){<text>}
       If the new syntax is used without mplabels, the braces are simply
       stripped, and the old syntax is then expected.

    -- \tlabel are now embedded in an alignment (\halign) and the lines
       of a multiline label can be centered (by starting the line of
       text with \hfil) and right aligned (by starting it with \hfill).

    -- All the macros (except those involving placement of text) that
       accept as their last parameter a list of points or numbers
       separated by commas have been extended to permit, instead of the
       list, the command \datafile{<file>}. If \using has been properly
       set, the data in <file> will be used in place of an explicitly
       typed list. The plain \datafile command (used in the context of
       drawing a path) functions as before, choosing whether to draw a
       \curve or a \polyline based on smoothness parameters. Now,
       however, one can also do \closedcspline\datafile{file.dat}, for
       example, or \point\datafile{file.dat}.

    -- Two commands, equivalent to issuing the command "\using" with
       default parameters for processing pair data (\usingpairdefault)
       or with the default for processing numeric data
       (\usingnumericdefault). The former sets up commands that get data
       from a file to use the first two space separated items on each
       line to produce a list of pair constants, and the latter takes
       the first item on each line producing a list of numeric
       constants.

    -- \mfpicdraft, \mfpicfinal, \mfpicnowrite. The first tells mfpic to
       do everything except include the figures. The second allows them
       to be included even if mfpic's automatic detection thinks they
       shouldn't (mfpic can be fooled in some cases, see the docs). The
       third tells mfpic to do everything except write anything to the
       .mf(.mp) file. This could be be used if the figures have all been
       successfully debugged and might speed processing. All these
       affect aspects of the \opengraphsfile command, and so should come
       before it. In LaTeX, Package options "draft", "final" and
       "nowrite" can also be used. Mfpic will see the
       \documentclass option "draft", in which case the "final" option
       can be given to mfpic in order to override it, if necessary.

    -- mfpic.tex no longer issues the command \DeclareGraphicsRule when
       in LaTeX2e and using metapost. Instead, a command internal to the
       graphic{sx} package is used within a local group to declare the
       current figure's numeric extension. This permits a possibly more
       user-friendly error message if the user includes a non-mfpic
       graphic with an unsupported extension

    -- Added commands to graphic processing to save the bounding box
       data for later use in proper label placement. As of version 0.5i,
       one can use truebbox or mplabels without the other.

    -- mfpicdoc now comes with an index of commands, mfpicdoc.ind. The
       macros necessary to process it are in indexing.tex (included),
       taken from eplain. The makeindex style, mfpic.ist, that produced
       mfpicdoc.ind from mfpicdoc.idx is included also (though it should
       not be required).

    -- New prefix command \gclip that clips the picture-so-far to that
       part which lies in the interior of the following closed curve.

    -- Changed an internal command to a user level command \axismarks.
       Then \axismarks{x}, for example, is the same as \xmarks.

    -- Bug fixes:
       * grafbase.mf: textrect, textoval, etc., easily triggered
         arithmetic overflow for lower resolution (<=300) mf modes.
         These have been changed to do calculations in graph coordinates
         (resolution independent). Does not effect grafbase.mp (unless
         text approaches a size of 400x400pt) but some changes made
         there as well.

       * \mfpverbtex incorrectly wrote every "#" symbol as "##". This
         was fixed. Some labelling commands ("\tlabels" for example)
         read their position argument(s) twice. This meant braces used
         to hide parentheses and commas within them had to be doubled.
         This was eliminated along with above noted extension of label
         position syntax.

What's new since mfpic 0.4?
--------------------------------

  * Axis commands:

    There are now 6 axes that can be drawn, besides x- and y-axis there
    are four border axes.
    All axes may be dashed, dotted, etc., just like any curve.

  * Tick marks:

    They can now be on either side or centered (or even off-center).
    They can be drawn on any of the 6 axes.

  * Additional text labels:

    Instead of issuing one \tlabel command for every label, there is now
    a \tlabels command to list all the labels at once.
        There is an abbreviation, \axislabels, for the special task of
    placing labels along an axis.
        There is a command, \tlabelsep, for setting a default separation
    of a label from its point of placement, and another \tlabeloffset,
    for shifting all following labels in a particular way.
        There is command, \tlabeljustify, for changing the default
    justification of the text in all following labels.
        And a command, \plottext, which will place the same bit of text
    at every one of a list of points.

  * Framing text:

    Given a bit of text, we now have commands for creating a rectangle,
    oval or circle that exactly surrounds it. This allows clearing the
    shape before placing the text, and the curve created can be dashed,
    dotted, etc., like any other mfpic curve.

  * Transformation prefixes:

    Transformation prefixes can be used to alter the path that follows.
    In addition to \rotatepath, we have now \shiftpath, \scalepath,
    \xscalepath, \yscalepath, \slantpath, \xslantpath, \yslantpath,
    \reflectpath and \xyswappath.

  * Misc. commands:

    There are now some commands for facilitating the creation of bar and
    pie charts, automatically calculating the correct proportions from
    supplied data.
        A new command now exists for filling the graph with a
    graph-paper like grid of lines, and a similar one for polar
    coordinates.
        There are two new commands for selecting colors in the graph:
    \tlabelcolor, and \backgroundcolor. Despite its name,
    \backgroundcolor doesn't change the background, but tells mfpic what
    color the background will be (\gclear will then use it).

  * Misc. changes:

    -- \grid takes an optional argument for the size of the dots.
    -- \datafile and \plotdata take an optional argument: p for
       polygonal or s for smooth.
    -- \plot, \plotsymbol, and \plotnodes formerly required a path name
       Triangle, etc.) for one argument. They now accept a picture or
       (in metapost) a string. You can do \plot{btex $\bullet$ etex}...
       or \plotsymbol{"a"}...  (provided \bullet has a robust
       meaning and " is not active).
    -- The symbol name Star now produces the standard 5-pointed star,
       and the new SolidStar is the same shape filled in. The old shape
       was just five straight lines, which is now provided by a new
       name, Asterisk.
    -- The \mfpic command's optional arguments are now both truely
       optional (default scale is 1).
    -- All commands that take an optional smoothness specification (s or
       p), now allow the s to be followed by a tension value.
    -- \\ now works (mostly) in labels when \metapost option is
       selected.
    -- Some commands have been made somewhat more error tolerant
       (invalid optional arguments replaced by defaults).
    -- New command: \everytlabel{...}. The contents are saved, to be
       inserted at the start of each \tlabel. This gets around the fact
       that each line of a \tlabel is a group. These tokens are inside
       the \tlabel group, but outside the group of each line.

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