Contents

require 'ruby-processing'

class RotatingBothSquaresSketch < Processing::App

  def setup
    render_mode P3D
    rect_mode CENTER
    @theta1 = @theta2 = 0
  end

  def draw
    background 255
    stroke 0
    fill 175

    # Save the current transformation matrix. 
    # This is where we started, with (0,0) in the top left corner of the window and no rotation.
    push_matrix 

    # Translate and rotate the first rectangle.
    translate 50, 50 
    rotate_z @theta1
    # Display the first rectangle.
    rect 0, 0, 60, 60 
    # Restore matrix from Step 1 so that it isn't affected by Steps 2 and 3!
    pop_matrix  

    push_matrix 
    # Translate and rotate the second rectangle.
    translate 150, 150 
    rotate_y @theta2
    # Display the second rectangle.
    rect 0, 0, 60, 60 
    pop_matrix 

    @theta1 += 0.02
    @theta2 += 0.02
  end

end

RotatingBothSquaresSketch.new :title => "Rotating Both Squares", :width => 200, :height => 200

Version data entries

4 entries across 4 versions & 1 rubygems

Version	Path
ruby-processing-1.0.1	samples/learning_processing/chapter_14/14_rotating_both_squares.rb
ruby-processing-1.0.2	samples/learning_processing/chapter_14/14_rotating_both_squares.rb
ruby-processing-1.0.4	samples/learning_processing/chapter_14/14_rotating_both_squares.rb
ruby-processing-1.0.3	samples/learning_processing/chapter_14/14_rotating_both_squares.rb