Sha256: f0f333602d701d8660294413caf29d70efa96223c3d1f1377484efd2b012c50e
Contents?: true
Size: 825 Bytes
Versions: 10
Compression:
Stored size: 825 Bytes
Contents
# Move the mouse to change the direction of the eyes.
# The atan2() function computes the angle from each eye
# to the cursor.
def setup
size 640, 360
@eyes = [
Eye.new(420, 230, 220),
Eye.new(250, 16, 120),
Eye.new(164, 185, 80)
]
no_stroke
end
def draw
background 102
@eyes.each do |eye|
eye.update mouse_x, mouse_y
eye.display self
end
end
class Eye
def initialize(x, y, sz) # contructor, called by Eye.new
@x, @y, @size = x, y, sz
end
def update(mx, my)
@angle = atan2(my - @y, mx - @x)
end
def display( context )
context.push_matrix
context.translate @x, @y
context.fill 255
context.ellipse 0, 0, @size, @size
context.rotate @angle
context.fill 153
context.ellipse @size/4, 0, @size/2, @size/2
context.pop_matrix
end
end
Version data entries
10 entries across 10 versions & 1 rubygems