Sha256: 67afa3c10b6e9e13f607b9314f7b8e27c3b70e4122624f48a43e2a1f6491876c
Contents?: true
Size: 812 Bytes
Versions: 9
Compression:
Stored size: 812 Bytes
Contents
#
# Brownian motion.
#
# Recording random movement as a continuous line.
#
NUM = 2000
RANGE = 6
attr_accessor :ax, :ay
def setup
size(640, 360)
@ax = Array.new(NUM, width/2)
@ay = Array.new(NUM, height/2)
frame_rate(30)
end
def draw
background(51)
# Shift all elements 1 place to the left
(1 ... NUM).each do |i|
ax[i-1] = ax[i]
ay[i-1] = ay[i]
end
# Put a new value at the end of the array
ax[NUM-1] += rand(-RANGE .. RANGE)
ay[NUM-1] += rand(-RANGE .. RANGE)
# Constrain all points to the screen
ax[NUM-1] = constrain(ax[NUM-1], 0, width)
ay[NUM-1] = constrain(ay[NUM-1], 0, height)
# Draw a line connecting the points
(1 ... NUM).each do |i|
val = i.to_f / NUM * 204.0 + 51
stroke(val)
line(ax[i-1], ay[i-1], ax[i], ay[i])
end
end
Version data entries
9 entries across 9 versions & 1 rubygems