+NAME
+ LaTeX::TikZ - Perl object model for generating PGF/TikZ code.
+
+VERSION
+ Version 0.01
+
+SYNOPSIS
+ use LaTeX::TikZ;
+
+ # A couple of lines
+ my $hline = Tikz->line(-1 => 1);
+ my $vline = Tikz->line([ 0, -1 ] => [ 0, -1 ]);
+
+ # Paint them in red
+ $_->mod(Tikz->color('red')) for $hline, $vline;
+
+ # An octogon
+ use Math::Complex;
+ my $octo = Tikz->closed_polyline(
+ map Math::Complex->emake(1, ($_ * pi)/4), 0 .. 7
+ );
+
+ # Only keep a portion of it
+ $octo->clip(Tikz->rectangle(-0.5*(1+i), 2*(1+i)));
+
+ # Fill it with dots
+ $octo->mod(Tikz->pattern(class => 'Dots'));
+
+ # Create a formatter object
+ my $tikz = Tikz->formatter;
+
+ # Put those objects all together and print them
+ my $seq = Tikz->seq($octo, $hline, $vline);
+ my ($head, $decl, $body) = $tikz->render($seq);
+ print "$_\n" for map @$_, $head, $decl, $body;
+
+DESCRIPTION
+ This module provides an object model for TikZ, a graphical tookit for
+ LaTeX. It allows you to build structures representing geometrical
+ figures, apply a wide set of modifiers on them, transform them globally
+ with functors, and print them in the context of an existing TeX
+ document.
+
+CONCEPTS
+ Traditionnaly, in TikZ, there are two ways of grouping elements, or
+ *ops*, together :
+
+ * either as a *sequence*, where each element is drawn in its own line
+ :
+
+ \draw (0cm,0cm) -- (0cm,1cm) ;
+ \draw (0cm,0cm) -- (1cm,0cm) ;
+
+ * or as a *path*, where elements are all drawn as one line :
+
+ \draw (0cm,0cm) -- (0cm,1cm) (0cm,0cm) -- (1cm,0cm) ;
+
+ This distinction is important because there are some primitves that only
+ apply to paths but not to sequences, and vice versa.
+
+ Figures are made of ops, path or sequence *sets* assembled together in a
+ tree.
+
+ *Modifiers* can be applied onto any set to alter the way in which it is
+ generated. The two TikZ concepts of *clips* and *layers* have been
+ unified with the modifiers.
+
+INTERFACE
+ Containers
+ "Tikz->path(@ops)"
+ Creates a LaTeX::TikZ::Set::Path object out of the ops @ops.
+
+ # A path made of two circles
+ Tikz->path(
+ Tikz->circle(0, 1),
+ Tikz->circle(1, 1),
+ )
+ ->mod(
+ Tikz->fill('red'),
+ 'even odd rule',
+ );
+
+ "Tikz->seq(@kids)"
+ Creates a LaTeX::TikZ::Set::Sequence object out of the sequences, paths
+ or ops @kids.
+
+ my $bag = Tikz->seq($sequence, $path, $circle, $raw, $point);
+
+ Elements
+ Those are the building blocks of your geometrical figure.
+
+ "Tikz->point($point)"
+ Creates a LaTeX::TikZ::Set::Point object by coercing $point into a
+ LaTeX::TikZ::Point. The following rules are available :
+
+ * If $point isn't given, the point defaults to "(0, 0)".
+
+ my $origin = Tikz->point;
+
+ * If $point is a numish Perl scalar, it is treated as "($point, 0)".
+
+ my $unit = Tikz->point(1);
+
+ * If two numish scalars $x and $y are given, they result in the point
+ "($x, $y)".
+
+ my $one_plus_i = Tikz->point(1, 1);
+
+ * If $point is an array reference, it is parsed as "($point->[0],
+ $point->[1])".
+
+ my $i = Tikz->point([ 0, 1 ]);
+
+ * If $point is a Math::Complex object, the
+ LaTeX::TikZ::Point::Math::Complex class is automatically loaded and
+ the point is coerced into "($point->Re, $point->Im)".
+
+ my $j = Tikz->point(Math::Complex->emake(1, 2*pi/3));
+
+ You can define automatic coercions from your user point types to
+ LaTeX::TikZ::Point by writing your own
+ LaTeX::TikZ::Point::My::User::Point class. See
+ LaTeX::TikZ::Meta::TypeConstraint::Autocoerce for the rationale and
+ LaTeX::TikZ::Point::Math::Complex for an example.
+
+ "Tikz->line($from => $to)"
+ Creates a LaTeX::TikZ::Set::Line object between the points $from and
+ $to.
+
+ my $x_axis = Tikz->line(-5 => 5);
+ my $y_axis = Tikz->line([ 0, -5 ] => [ 0, 5 ]);
+
+ "Tikz->polyline(@points)"
+ Creates a LaTeX::TikZ::Set::Polyline object that links the successive
+ elements of @points by segments.
+
+ my $U = Tikz->polyline(
+ Tikz->point(0, 1),
+ Tikz->point(0, 0),
+ Tikz->point(1, 0),
+ Tikz->point(1, 1),
+ );
+
+ "Tikz->closed_polyline(@points)"
+ Creates a LaTeX::TikZ::Set::Polyline object that cycles through
+ successive eleemnts of @points.
+
+ my $diamond = Tikz->closed_polyline(
+ Tikz->point(0, 1),
+ Tikz->point(-1, 0),
+ Tikz->point(0, -2),
+ Tikz->point(1, 0),
+ );
+
+ "Tikz->rectangle($from => $to), Tikz->rectangle($from => { width => $width, height => $height })"
+ Creates a LaTeX::TikZ::Set::Rectangle object with opposite corners $from
+ and $to, or with anchor point $from and dimensions $width and $height.
+
+ my $square = Tikz->rectangle(
+ Tikz->point,
+ Tikz->point(2, 1),
+ );
+
+ "Tikz->circle($center, $radius)"
+ Creates a LaTeX::TikZ::Set::Circle object of center $center and radius
+ $radius.
+
+ my $unit_circle = Tikz->circle(0, 1);
+
+ "Tikz->arc($from => $to, $center)"
+ Creates a LaTeX::TikZ::Set structure that represents an arc going from
+ $from to $to with center $center.
+
+ # An arc. The points are automatically coerced into LaTeX::TikZ::Set::Point objects
+ my $quarter = Tikz->arc(
+ [ 1, 0 ] => [ 0, 1 ],
+ [ 0, 0 ]
+ );
+
+ "Tikz->arrow($from => $to), Tikz->arrow($from => dir => $dir)"
+ Creates a LaTeX::TikZ::Set structure that represents an arrow going from
+ $from towards $to, or starting at $from in direction $dir.
+
+ # An horizontal arrow
+ my $arrow = Tikz->arrow(0 => 1);
+
+ "Tikz->raw($content)"
+ Creates a LaTeX::TikZ::Set::Raw object that will instantiate to the raw
+ TikZ code $content.
+
+ Modifiers
+ Modifiers are applied onto sets by calling the "->mod" method, like in
+ "$set->mod($mod)". This method returns the $set object, so it can be
+ chained.
+
+ "Tikz->clip($path)"
+ Creates a LaTeX::TikZ::Mod::Clip object that can be used to clip a given
+ sequence by the (closed) path $path.
+
+ my $box = Tikz->clip(
+ Tikz->rectangle(0 => [ 1, 1 ]),
+ );
+
+ Clips can also be directly applied to sets with the "->clip" method.
+
+ my $set = Tikz->circle(0, 1.5)
+ ->clip(Tikz->rectangle([-1, -1] => [1, 1]));
+
+ "Tikz->layer($name, above => \@above, below => \@below)"
+ Creates a LaTeX::TikZ::Mod::Layer object with name $name and optional
+ relative positions @above and @below.
+
+ my $layer = Tikz->layer(
+ 'top'
+ above => [ 'main' ],
+ );
+
+ The default layer is "main".
+
+ Layers are stored into a global hash, so that when you refer to them by
+ their name, you get the existing layer object.
+
+ Layers can also be directly applied to sets with the "->layer" method.
+
+ my $dots = Tikz->rectangle(0 => [ 1, 1 ])
+ ->mod(Tikz->pattern(class => 'Dots'))
+ ->layer('top');
+
+ "Tikz->width($line_width)"
+ Creates a LaTeX::TikZ::Mod::Width object that sets the line width to
+ $line_width when applied.
+
+ my $thick_arrow = Tikz->arrow(0 => 1)
+ ->mod(Tikz->width(5));
+
+ "Tikz->color($color)"
+ Creates a LaTeX::TikZ::Mod::Colorobject that sets the line color to
+ $color (given in the "xcolor" syntax).
+
+ # Paint the previous $thick_arrow in red.
+ $thick_arrow->mod(Tikz->color('red'));
+
+ "Tikz->fill($color)"
+ Creates a LaTeX::TikZ::Mod::Fill object that fills the interior of a
+ path with the solid color $color (given in the "xcolor" syntax).
+
+ my $red_box = Tikz->rectangle(0 => { width => 1, height => 1 })
+ ->mod(Tikz->fill('red'));
+
+ "Tikz->pattern(class => $class, %args)"
+ Creates a LaTeX::TikZ::Mod::Pattern object of class $class and arguments
+ %args that fills the interior of a path with the specified pattern.
+ $class is prepended with "LaTeX::TikZ::Mod::Pattern" when it doesn't
+ contain "::". See LaTeX::TikZ::Mod::Pattern::Dots and
+ LaTeX::TikZ::Mod::Pattern::Lines for two examples of pattern classes.
+
+ my $hatched_circle = Tikz->circle(0 => 1)
+ ->mod(Tikz->pattern(class => 'Lines'));
+
+ "Tikz->raw_mod($content)"
+ Creates a LaTeX::TikZ::Mod::Raw object that will instantiate to the raw
+ TikZ mod code $content.
+
+ my $homemade_arrow = Tikz->line(0 => 1)
+ ->mod(Tikz->raw_mod('->')) # or just ->mod('->')
+
+ Helpers
+ "Tikz->formatter(%args)"
+ Creates a LaTeX::TikZ::Formatter object that can render a
+ LaTeX::TikZ::Set tree.
+
+ my $tikz = Tikz->formatter;
+ my ($header, $declarations, $seq1_body, $seq2_body) = $tikz->render($set1, $set2);
+
+ "Tikz->functor(@rules)"
+ Creates a LaTeX::TikZ::Functor anonymous subroutine that can be called
+ against LaTeX::TikZ::Set trees to clone them according to the given
+ rules. @rules should be made of array references whose first element is
+ the class/role to match against and the second the handler to run.
+
+ # The default is a clone method
+ my $clone = Tikz->functor;
+ my $dup = $set->$clone;
+
+ # A translator
+ my $translate = Tikz->functor(
+ 'LaTeX::TikZ::Set::Point' => sub {
+ my ($functor, $set, $x, $y) = @_;
+
+ $set->new(
+ point => [
+ $set->x + $x,
+ $set->y + $y,
+ ],
+ label => $set->label,
+ pos => $set->pos,
+ );
+ },
+ );
+ my $shifted = $set->$translate(1, 1);
+
+ # A mod stripper
+ my $strip = Tikz->functor(
+ 'LaTeX::TikZ::Mod' => sub { return },
+ );
+ my $naked = $set->$strip;
+
+DEPENDENCIES
+ Any::Moose with Mouse 0.63 or greater.
+
+ Sub::Name.
+
+ Scope::Guard.
+
+ Math::Complex, Math::Trig.
+
+ Scalar::Util, List::Util, Task::Weaken.
+
+SEE ALSO
+ PGF/TikZ - <http://pgf.sourceforge.net>.
+
+AUTHOR
+ Vincent Pit, "<perl at profvince.com>", <http://www.profvince.com>.
+
+ You can contact me by mail or on "irc.perl.org" (vincent).
+
+BUGS
+ Please report any bugs or feature requests to "bug-latex-tikz at
+ rt.cpan.org", or through the web interface at
+ <http://rt.cpan.org/NoAuth/ReportBug.html?Queue=LaTeX-TikZ>. I will be
+ notified, and then you'll automatically be notified of progress on your
+ bug as I make changes.
+
+SUPPORT
+ You can find documentation for this module with the perldoc command.
+
+ perldoc LaTeX::TikZ
+
+COPYRIGHT & LICENSE
+ Copyright 2010 Vincent Pit, all rights reserved.
+
+ This program is free software; you can redistribute it and/or modify it
+ under the same terms as Perl itself.
+
projects / perl / modules / LaTeX-TikZ.git / blobdiff