Contents

#
# Sine Cosine. 
# 
# Linear movement with sin() and cos(). 
# Numbers between 0 and PI*2 (TAU which angles roughly 6.28) 
# are put into these functions and numbers between -1 and 1 are 
# returned. These values are then scaled to produce larger movements.
# note only angle1 angle2 need scope outside draw loop
#
 
attr_reader :angle1, :angle2
SCALAR = 70

def setup
  size(640, 360)
  noStroke()
  rectMode(CENTER)
  @angle1 = 0
  @angle2 = 0
end

def draw
  background(0)

  ang1 = angle1.radians
  ang2 = angle2.radians

  x1 = width / 2 + (SCALAR * cos(ang1))
  x2 = width / 2 + (SCALAR * cos(ang2))
  
  y1 = height / 2 + (SCALAR * sin(ang1))
  y2 = height / 2 + (SCALAR * sin(ang2))
  
  fill(255)
  rect(width * 0.5, height * 0.5, 140, 140)

  fill(0, 102, 153)
  ellipse(x1, height * 0.5 - 120, SCALAR, SCALAR)
  ellipse(x2, height * 0.5 + 120, SCALAR, SCALAR)
  
  fill(255, 204, 0)
  ellipse(width * 0.5 - 120, y1, SCALAR, SCALAR)
  ellipse(width * 0.5 + 120, y2, SCALAR, SCALAR)

  @angle1 += 2
  @angle2 += 3  
end

Version data entries

5 entries across 5 versions & 1 rubygems

Version	Path
ruby-processing-2.6.3	samples/processing_app/basics/math/sine_cosine.rb
ruby-processing-2.6.2	samples/processing_app/basics/math/sine_cosine.rb
ruby-processing-2.6.1	samples/processing_app/basics/math/sine_cosine.rb
ruby-processing-2.6.0	samples/processing_app/basics/math/sine_cosine.rb
ruby-processing-2.5.1	samples/processing_app/basics/math/sine_cosine.rb