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Contents
require 'ruby-processing'
# Simple Linear Gradient
# by Ira Greenberg.
#
# Using the convenient red(), green()
# and blue() component functions,
# generate some linear gradients.
class LinearGradient < Processing::App
def setup
b1 = color 190
b2 = color 20
set_gradient 0, 0, width.to_f, height.to_f, b1, b2, :y_axis
c1 = color 255, 120, 0
c2 = color 10, 45, 255
c3 = color 10, 255, 15
c4 = color 125, 2, 140
c5 = color 255, 255, 0
c6 = color 25, 255, 200
set_gradient 25, 25, 75, 75, c1, c2, true
set_gradient 100, 25, 75, 75, c3, c4, false
set_gradient 25, 100, 75, 75, c2, c5, false
set_gradient 100, 100, 75, 75, c4, c6, true
end
def set_gradient( x, y, w, h, c1, c2, vertical )
delta_r = red(c2) - red(c1)
delta_g = green(c2) - green(c1)
delta_b = blue(c2) - blue(c1)
x.upto( x+w ) do |i|
y.upto( y+w ) do |j|
c = color(red(c1)+(j-y)*(delta_r/h),
green(c1)+(j-y)*(delta_g/h),
blue(c1)+(j-y)*(delta_b/h) )
vertical ? set(i, j, c) : set(j, i, c)
end
end
end
end
LinearGradient.new :title => "Linear Gradient", :width => 200, :height => 200
Version data entries
9 entries across 9 versions & 1 rubygems