Sha256: d6e40a8a33e1d575c5056c4984bac791e47adf95fe6fb372349ccad688452a1f
Contents?: true
Size: 887 Bytes
Versions: 9
Compression:
Stored size: 887 Bytes
Contents
#
# Noise Wave
# by Daniel Shiffman.
#
# Using Perlin Noise to generate a wave-like pattern.
#
attr_reader :yoff # 2nd dimension of perlin noise
def setup
size(640, 360)
@yoff = 0.0
end
def draw
background(51)
fill(255)
# We are going to draw a polygon out of the wave points
begin_shape
xoff = 0 # Option #1: 2D Noise
# xoff = yoff # Option #2: 1D Noise
# Iterate over horizontal pixels
(0 .. width).step(10) do |x|
# Calculate a y value according to noise, map to
y = map(noise(xoff, yoff), 0, 1, 200,300) # Option #1: 2D Noise
# y = map(noise(xoff), 0, 1, 200,300) # Option #2: 1D Noise
# Set the vertex
vertex(x, y)
# Increment x dimension for noise
xoff += 0.05
end
# increment y dimension for noise
@yoff += 0.01
vertex(width, height)
vertex(0, height)
end_shape(CLOSE)
end
Version data entries
9 entries across 9 versions & 1 rubygems