https://github.com/pioz/rplot
C extension for Ruby of GNU libplot
https://github.com/pioz/rplot
libplot plot ruby
Last synced: about 1 month ago
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C extension for Ruby of GNU libplot
- Host: GitHub
- URL: https://github.com/pioz/rplot
- Owner: pioz
- License: gpl-3.0
- Created: 2010-12-27T10:02:32.000Z (over 15 years ago)
- Default Branch: master
- Last Pushed: 2011-01-25T18:09:55.000Z (over 15 years ago)
- Last Synced: 2024-09-01T03:56:44.329Z (almost 2 years ago)
- Topics: libplot, plot, ruby
- Language: Ruby
- Homepage: https://github.com/pioz/rplot
- Size: 250 KB
- Stars: 1
- Watchers: 3
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.rdoc
- License: LICENSE
Awesome Lists containing this project
README
= rplot
*rplot* is a C extension for Ruby of GNU libplot.
{GNU
libplot}[http://www.gnu.org/software/plotutils/manual/html_mono/plotutils.html#SEC45]
is a free function library for drawing two-dimensional vector
graphics. It can produce smooth, double-buffered animations for the X
Window System, and can export files in many graphics file formats. It
is `device-independent' in the sense that its API (application
programming interface) is to a large extent independent of the display
type or output format. Rplot is a C extension for Ruby of GNU libplot.
== Requirements
* libplot-dev
For Debian/Ubuntu users: apt-get install libplot-dev.
For Max OS X users use {port}[http://www.macports.org/]: port
install plotutils.
== Installation
gem install rplot
== Usage
Here two little examples.
The first invokes rplot operations to draw vector graphics. It draws
an intricate and beautiful path (Bill Gosper's "C" curve, discussed as
Item #135 in HAKMEM, MIT Artificial Intelligence Laboratory Memo #239,
1972). As the numeric constant MAXORDER (here equal to 12) is
increased, the path will take on the shape of a curly letter "C",
which is the envelope of a myriad of epicyclic octagons.
require 'rubygems'
require 'rplot'
module MyCurve
MAXORDER = 12
def draw_curve(dx, dy, order)
if order >= MAXORDER
self.cont(dx, dy, :rel => true)
else
self.draw_curve(0.5*(dx-dy), 0.5*(dx+dy), order+1)
self.draw_curve(0.5*(dx+dy), 0.5*(dy-dx), order+1)
end
end
end
Plotter.send(:include, MyCurve)
Plotter.params(:pagesize => 'letter')
Plotter.draw('png', 'RUBYtest3.png')do |p|
p.space(0,0, 1000,1000)
p.linewidth(0.25)
p.pencolor('red')
p.move(600, 300)
p.draw_curve(0, 400, 0)
end
The second example creates a simple animated pseudo-GIF, 150 pixels
wide and 100 pixels high.
require 'rubygems'
require 'rplot'
Plotter.params(:bitmapsize => '150x100',
:bg_color => 'orange',
:transparent_color => 'orange',
:gif_iterations => 100,
:gif_delay => 5)
p = Plotter.new('gif', 'image.gif')
p.open
p.space(0,0,149,99)
p.pencolor('red')
p.linewidth(5)
p.filltype(1)
p.fillcolor('black')
i = 0
while i < 180
p.erase
p.erase
p.ellipse(75,50,40,20,i)
i += 15
end
p.delete
{Here the complete documentation with
API}[http://pioz.github.com/rplot/Plotter.html].
== Questions or problems?
If you have any issues with rplot please add an {issue on
GitHub}[https://github.com/pioz/rplot/issues] or fork the project and
send a pull request.
== Copyright
Copyright (c) 2010 Enrico Pilotto. See
{LICENSE}[http://github.com/pioz/rplot/blob/master/LICENSE] for
details.