Contents

# Rotate. 
# 
# Rotating a square around the Z axis. To get the results
# you expect, send the rotate function angle parameters that are
# values between 0 and PI*2 (TAU which is roughly 6.28). If you prefer to 
# think about angles as degrees (0-360), you can use the radians 
# method to convert your values. For example: scale(90.radians)
# is identical to the statement scale(PI/2).


# Notice in ruby everything is an object, so we can chain stuff
# check it out using irb to see what you get with Time.now
# Time.now.sec and finally Time.now.sec.even? isn't ruby just wonderful


def setup    
  size 640, 360  
  no_stroke
  fill 255
  frame_rate 30
  rect_mode CENTER    
  @angle = 0.0
  @cosine = 0.0
  @jitter = 0.0
end

def draw    
  background 51  	
  @jitter = rand(-0.1 .. 0.1) if Time.now.sec.even? 	
  @angle += @jitter
  translate width / 2, height / 2
  rotate cos(@angle)   	
  rect 0, 0, 180, 180
end

Version data entries

4 entries across 4 versions & 1 rubygems

Version	Path
ruby-processing-2.6.2	samples/processing_app/basics/transform/rotate.rb
ruby-processing-2.6.1	samples/processing_app/basics/transform/rotate.rb
ruby-processing-2.6.0	samples/processing_app/basics/transform/rotate.rb
ruby-processing-2.5.1	samples/processing_app/basics/transform/rotate.rb