Sha256: c7ba9dae1a7898e8a90bb4f2e0f919e5fbd16f79ebe87c7de1e58c0a4cb7e475
Contents?: true
Size: 699 Bytes
Versions: 9
Compression:
Stored size: 699 Bytes
Contents
# Double Random
# by Ira Greenberg.
#
# Using two rand(..) calls and the point() function to
# create an irregular sawtooth line. The noise line guards
# against an illegal input to rand range when min > max,
# and to return min as vanilla processing does
# (NB: the sawtooth relies on this)
attr_reader :steps
def setup
size 640, 360
frame_rate(1)
total_pts = 300
@steps = total_pts + 1.0
stroke_weight 2
stroke 255
end
def draw
background 0
rand_y = 0.0
(1 ... steps).each do |i|
noise_y = (rand_y > 0)? rand(-rand_y .. rand_y) : rand(rand_y .. -rand_y)
point( (width/steps) * i, (height/2) + noise_y )
rand_y += rand(-5 .. 5)
end
end
Version data entries
9 entries across 9 versions & 1 rubygems