Sha256: 2906060afbd9b365bb1192d7a5b3419b174acf2cf62aa238e8e0884de441104d
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Contents
require 'ruby-processing'
# Conditions are like questions.
# They allow a program to decide to take one action if
# the answer to a question is true or to do another action
# if the answer to the question is false.
# The questions asked within a program are always logical
# or relational statements. For example, if the variable 'i' is
# equal to zero then draw a line.
class Conditionals1 < Processing::App
def setup
background 0
1.upto( width / 10 ) do |i|
# If 'i' is even then draw the first line otherwise draw the second line
i.even? ? draw_short(i) : draw_long(i)
end
end
def draw_short(i)
stroke 153
line i*10, 40, i*10, height/2
end
def draw_long(i)
stroke 102
line i*10, 20, i*10, 180
end
end
# Ruby allows us to extend base classes, such as numbers, with
# methods of our choosing. In this case we'll add methods that tell
# you whether a given integer is even or odd.
class Fixnum
def even?
self % 2 == 0
end
def odd?
!even?
end
end
Conditionals1.new :title => "Conditionals1", :width => 200, :height => 200
Version data entries
9 entries across 9 versions & 1 rubygems