1st update as ruby-processing

Author: monkstone

chapter_06/Rakefile~

@@ -1,10 +1,13 @@
-require 'ruby-processing'
+# Introducing the Processing::Proxy module, to access sketch methods/variables 
+
+
+# require 'car'
 
 class CarClassAndCarVariable < Processing::App
 
   def setup
     # Initialize a car object
-    @my_car = Car.new(self)
+    @my_car = Car.new
     rect_mode CENTER
   end
 
@@ -20,25 +23,35 @@ def draw
 end
 
 
-class Car # Define a class below the rest of the program.
+# Define a class below the rest of the program.
+# Or in another file eg car.rb then use require 'car' to include in the sketch
+# 
+# 'include Processing::Proxy' makes methods and variables available
+# to the Car (similar to processings java inner class) except that
+# width and height are excluded, hence global $app is reqd to access them
 
-  def initialize(app)
-    @app = app
-    @c = @app.color 175
-    @xpos = @app.width/2
-    @ypos = @app.height/2
+class Car 
+  include Processing::Proxy
+  
+  attr_reader :width, :height
+  
+  def initialize
+    @width, @height = $app.width, $app.height
+    @c = color 175
+    @xpos = width / 2
+    @ypos = height / 2
     @xspeed = 1
   end
 
   def display_car # A new function of class Car
-    @app.stroke 0
-    @app.fill @c
-    @app.rect @xpos, @ypos, 20, 10
+    stroke 0
+    fill @c
+    rect @xpos, @ypos, 20, 10
   end
 
   def move
     @xpos = @xpos + @xspeed
-    @xpos = 0 if @xpos > @app.width
+    @xpos = 0 if @xpos > width
   end
 end
 

chapter_08/01_car_class_and_car_variable.rb

@@ -1,23 +1,32 @@
-require 'ruby-processing'
+# Introducing the ruby-processing control panel
 
 class TwoCarObjects < Processing::App
   load_library :control_panel
-
+  attr_reader :panel, :hide
+  
   def setup
+    @hide = false
     control_panel do |c|
+      c.look_feel "Metal"
       c.slider :red_car_speed, -5..15
       c.slider :blue_car_speed, -5..15
+      @panel = c
     end
 
     # Initialize car objects
-    @red_car  = Car.new(self, color(255,0,0), 0, 100)
-    @blue_car  = Car.new(self, color(0,0,255), 0, 10)
+    @red_car  = Car.new(color(255,0,0), 0, 100)
+    @blue_car  = Car.new(color(0,0,255), 0, 10)
     @red_car_speed = 1
     @blue_car_speed = 2
     rect_mode CENTER
   end
 
   def draw
+    if !hide # only set once
+      panel.visible = true 
+      @hide = true
+    end
+
     background 255
 
     # Operate the car object in draw
@@ -32,27 +41,29 @@ def draw
 
 
 class Car # Define a class below the rest of the program.
-  attr_accessor :temp_color, :temp_x_position, :temp_y_position, :temp_x_speed
+  include Processing::Proxy
+  
+  attr_accessor :width, :temp_color, :temp_x_position, :temp_y_position, :temp_x_speed
   LENGTH = 20
-  HEIGHT = 10
+  CHEIGHT = 10
 
-  def initialize(app, temp_color, temp_x_position, temp_y_position)
-    @app = app
+  def initialize(temp_color, temp_x_position, temp_y_position)
+    @width = $app.width
     @c = temp_color
     @xpos = temp_x_position
     @ypos = temp_y_position
   end
 
   def display_car # A new function of class Car
-    @app.stroke 0
-    @app.fill @c
-    @app.rect @xpos, @ypos, LENGTH, HEIGHT
+    stroke 0
+    fill @c
+    rect @xpos, @ypos, LENGTH, CHEIGHT
   end
 
   def move(speed)
     @xpos += speed
-    @xpos = 0 if @xpos > @app.width + LENGTH/2
-    @xpos = @app.width if @xpos < -LENGTH/2
+    @xpos = 0 if @xpos > width + LENGTH/2
+    @xpos = width if @xpos < -LENGTH/2
   end
 end
 

chapter_08/02_two_car_objects.rb

@@ -1,81 +1,35 @@
-require 'ruby-processing'
+require 'zoog' # zoog class is defined in zoog.rb
 
-class ObjectOrientedZoog < Processing::App
-  load_library "control_panel"
+load_library :control_panel
+attr_reader :panel, :hide
 
-  def setup
-    smooth
-    control_panel do |c|
-      c.slider :zoog_jiggle_factor, 0..width/10
-    end
-    
-    # Initalize zoog
-    @zoog = Zoog.new(self, 100, 125, 60, 60, 16)
-    @zoog_jiggle_factor = 10
-    
-    rect_mode CENTER
-    ellipse_mode CENTER
+def setup
+  size 200, 200
+  smooth 4
+  control_panel do |c|
+    c.look_feel "Metal"
+    c.slider :zoog_jiggle_factor, 0..width / 10, 5.0
+    @panel = c
   end
 
-  def draw
-    background 255
-    
-    # mouse_x position determines speed factor
-    # factor = constrain(mouse_x/10, 0, 5)
-    
-    @zoog.jiggle(@zoog_jiggle_factor)
-    @zoog.display
-  end
+  # Initalize zoog
+  @zoog = Zoog.new(100, 125, 60, 60, 16)
+
 
+  rect_mode CENTER
+  ellipse_mode CENTER
 end
 
-class Zoog
-  attr_accessor :temp_x_position, :temp_y_position, :temp_width, :temp_height, :temp_eye_size
-  
-  def initialize(app, temp_x_position, temp_y_position, temp_zoog_width, temp_zoog_height, temp_eye_size)
-    @app = app
-    @x, @y = temp_x_position, temp_y_position
-    @w, @h = temp_zoog_width, temp_zoog_height
-    @eye_size = temp_eye_size
+def draw
+  if !hide # only set once
+    panel.visible = true 
+    @hide = true
   end
+  background 255
 
-  # Move zoog
-  def jiggle(speed)
-    @x = @x + speed * @app.random(-1,1)
-    @y = @y + speed * @app.random(-1,1)
-    
-    @x = @app.constrain(@x, 0, @app.width)
-    @y = @app.constrain(@y, 0, @app.height)
-  end
+  # mouse_x position determines speed factor
+  # factor = constrain(mouse_x / 10, 0, 5)
 
-  def display
-    # Draw zoog's arms
-    (@y - @h/3).step((@y + @h/2), 10) do |i|
-    @app.stroke 0
-    @app.line @x-@w/4, i, @x+@w/4, i
-    end
-    
-    # Draw zoog's body
-    @app.stroke 0
-    @app.fill 255
-    @app.rect @x, @y, @w/6, @h
-    
-    # Draw zoog's head
-    @app.stroke 0
-    @app.fill 255
-    @app.ellipse @x, @y-@h, @w, @h
-    
-    # Draw zoog's eyes
-    @app.fill 0
-    @app.ellipse @x-@w/3, @y-@h, @eye_size, @eye_size*2
-    @app.ellipse @x+@w/3, @y-@h, @eye_size, @eye_size*2
-    
-    # Draw zoog's legs
-    @app.stroke 0
-    @app.line @x-@w/12, @y+@h/2, @x-@w/4, @y+@h/2+10
-    @app.line @x+@w/12, @y+@h/2, @x+@w/4, @y+@h/2+10
-  end
-  
-end  
-
-ObjectOrientedZoog.new :title => "Object Oriented Zoog", :width => 200, :height => 200
+  @zoog.jiggle(@zoog_jiggle_factor)
+  @zoog.display
+end

chapter_08/03_object_oriented_zoog.rb

@@ -0,0 +1,51 @@
+class Zoog
+  include Processing::Proxy
+  attr_accessor :width, :height
+  attr_accessor :temp_x_position, :temp_y_position, :temp_width, :temp_height, :temp_eye_size
+  
+  def initialize(temp_x_position, temp_y_position, temp_zoog_width, temp_zoog_height, temp_eye_size)
+    @width, @height = $app.width, $app.height
+    @x, @y = temp_x_position, temp_y_position
+    @w, @h = temp_zoog_width, temp_zoog_height
+    @eye_size = temp_eye_size
+  end
+  
+  # Move zoog
+  def jiggle(speed)
+    @x = @x + speed * rand(-1.0 .. 1)
+    @y = @y + speed * rand(-1.0 .. 1)
+    
+    @x = constrain(@x, 0, width)
+    @y = constrain(@y, 0, height)
+  end
+  
+  def display
+    # Draw zoog's arms
+    (@y - @h/3).step((@y + @h/2), 10) do |i|
+    stroke 0
+    line @x-@w/4, i, @x+@w/4, i
+    end
+    
+    # Draw zoog's body
+    stroke 0
+    fill 255
+    rect @x, @y, @w/6, @h
+    
+    # Draw zoog's head
+    stroke 0
+    fill 255
+    ellipse @x, @y-@h, @w, @h
+    
+    # Draw zoog's eyes
+    fill 0
+    ellipse @x-@w/3, @y-@h, @eye_size, @eye_size*2
+    ellipse @x+@w/3, @y-@h, @eye_size, @eye_size*2
+    
+    # Draw zoog's legs
+    stroke 0
+    line @x-@w/12, @y+@h/2, @x-@w/4, @y+@h/2+10
+    line @x+@w/12, @y+@h/2, @x+@w/4, @y+@h/2+10
+  end
+  
+end  
+

chapter_08/zoog.rb

@@ -1,34 +1,33 @@
-require 'ruby-processing'
-
 class CatcherSketch < Processing::App
   def setup
     @catcher = Catcher.new(32)
-    smooth
+    smooth 4
   end
 
   def draw
     background 255
-    @catcher.set_location mouse_x, mouse_y
+    @catcher.set_location 
     @catcher.display
   end
 end
 
 
 class Catcher
+  include Processing::Proxy
+  
   def initialize(temp_r)
     @r = temp_r
     @x, @y = 0, 0
   end
 
-  def set_location(temp_x, temp_y)
-    @x, @y = temp_x, temp_y
+  def set_location
+    @x, @y = mouse_x, mouse_y
   end
 
-  # In Ruby-Processing, you can always find the sketch in $app.
   def display
-    $app.stroke 0
-    $app.fill 175
-    $app.ellipse @x, @y, @r*2, @r*2
+    stroke 0
+    fill 175
+    ellipse @x, @y, @r*2, @r*2
   end
 end