# infinity.rb
# An 'infinity loop?'
load_libraries :test_free
full_screen
attr_reader :xrot, :yrot, :zrot, :wheel, :col
def setup_the_spiral
@spiral = ContextFree.define do
rule :infinity do
360.times do |i|
split do
segment :rz => i, :ry => Math.sin(i*Math::PI/180)*0.2, :x => Math.cos(i*Math::PI/180)*3
rewind
end
end
end
rule :segment do
cube :alpha => 0.8
end
rule :segment do
cube :brightness => 1.0, :saturation => 1.0
end
end
end
def setup
render_mode P3D
@wheel = JWheelListener.new(-50, -20) # initialize listener with start_z and maximum values
self.add_mouse_wheel_listener(wheel) # register the mouse listener
smooth
@xrot = 0.01
@yrot = 0
@zrot = 0
@col = 0
setup_the_spiral
end
def draw
background 0
setup_lights col
specular col, 1, 1
emissive 0.05
shininess 10
smooth_rotation(3, 3.2)
smooth_color(6.0)
@spiral.render :infinity, :start_x => 0, :start_y => 0, :start_z => wheel.zoom, :size => height/350,
:stop_size => 0.2, :color => [0, 0.7, 0.7, 0.5], :rx => xrot, :ry => yrot, :rz => zrot
end
##
# Generate a gradient value that changes smoothly over time in the range [ 0, 1 ].
# The Math.sin() function is used to map the current time in milliseconds somewhere
# in the range [ 0, 1 ]. A 'speed' factor is specified by the parameters s1.
#
def smooth_gradient(s1)
mills = millis * 0.00003
gradient = 0.5 * Math.sin(mills * s1) + 0.5
end
##
# Rotate the current coordinate system.
# Uses smooth_gradient() to smoothly animate the rotation.
#
def smooth_rotation(s1, s2)
@yrot = 2.0 * Math::PI * smooth_gradient(s1)
@zrot = 2.0 * Math::PI * smooth_gradient(s2)
end
##
# Generate a 'hue' value which smoothly changes over time.
# The speed of change is controlled by the parameter s1.
#
def smooth_color(s1)
@col = smooth_gradient(s1)
end
def setup_lights(col)
directional_light(col, 0.8, 0.8, -0.5, 0.5, -1)
point_light(col, 0.8, 0.8, -0.5, 0.5, -1)
ambient_light(col, 0.8, 0.8, 1, 1, 1)
end
