GuiGeo
There are a few good geometry gems already available for Ruby (ruby-geometry and geometry), but I need one which is focused on the needs of creating 2D graphical user interfaces.
Installation
Add this line to your application's Gemfile:
gem 'gui_geometry'
And then execute:
$ bundle
Or install it yourself as:
$ gem install gui_geometry
Usage
Points are represented by X and Y coordinates:
Rectangles consist of two point objects. One specifies the location of the rectangle - it's top-left corner. The other specifies its size in terms of width then height.
require "gui_geometry"
include GuiGeo
# create point x == y == 0
point
# => point(0,0)
# create a point x=3, y=4
my_point = point(3,4)
# => point(3,4)
[my_point.x, my_point.y]
# => [3, 4]
# create a rectangle - x, y, w, h form
rect(4,5,100,80)
# => rect(4,5,100,80)
# create rectangle - location, size form
my_rect = rect point(4,5), point(100,80)
# => rect(4,5,100,80)
# create rectangle - size form (location defaults to 0,0
rect point(30,50)
# => rect(0,0,30,50)
# get loc and size:
[my_rect.loc, my_rect.size]
# => [point(4,5), point(100,80)]
# get x, y, width and height
[my_rect.x, my_rect.y, my_rect.w, my_rect.h]
# => [4, 5, 100, 80]
# get the 4 corners:
[my_rect.tl, my_rect.tr, my_rect.bl, my_rect.br]
# => [point(4,5), point(104,5), point(4,85), point(104,85)]To get access to min, max, bound, and minmax:
include GuiGeo::Tools
min(4,5)
# => 4
max(4,5)
# => 5
minmax(4,5)
# => [4,5]
bound(5,4,10)
# => 5
Contributing
- Fork it
- Create your feature branch (
git checkout -b my-new-feature) - Commit your changes (
git commit -am 'Add some feature') - Push to the branch (
git push origin my-new-feature) - Create new Pull Request