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Contents
# Simple Radial Gradient
# by Ira Greenberg.
#
# Using the convenient red(), green()
# and blue() component functions,
# generate an array of radial gradients.
COLOR_SPACE = 16581375 # 255 * 255 * 255
def setup
size 640, 360
background 0
smooth
no_fill
stroke_width 1.8
columns = 4
radius = (width / columns) / 2
diameter = radius * 2
(width / diameter).times do |left|
(height / diameter).times do |top|
create_gradient(
radius+left*diameter, radius+top*diameter, radius, random_color, random_color
)
end
end
end
def random_color
color(rand(COLOR_SPACE))
end
def create_gradient( x, y, radius, c1, c2 )
delta_r = red(c2) - red(c1)
delta_g = green(c2) - green(c1)
delta_b = blue(c2) - blue(c1)
radius.times do |r|
c = color(red(c1) + r * (delta_r / radius),
green(c1) + r * (delta_g / radius),
blue(c1) + r * (delta_b / radius))
stroke c
ellipse x, y, r*2, r*2
end
end
Version data entries
10 entries across 10 versions & 1 rubygems