Add autorun Rakefile

Author: monkstone

chapter_15/12_pixel_neighbour_differences.rb

@@ -1,43 +1,40 @@
-require 'ruby-processing'
 
-class PixelNeighbourDifferencesSketch < Processing::App
 
-  def setup
-    @img = load_image 'sunflower.jpg'
-    @destination = create_image @img.width, @img.height, RGB
-  end
+def setup
+  size 200, 200
+  @img = load_image 'sunflower.jpg'
+  @destination = create_image @img.width, @img.height, RGB
+end
 
-  def draw
-    # We are going to look at both image's pixels
-    @img.load_pixels
-    @destination.load_pixels
-
-    # Since we are looking at left neighbors
-    # We skip the first column
-    (1...width).each do |x|
-      (0...height).each do |y|
-        # Pixel location and color
-        loc = x + y * @img.width
-        pix = @img.pixels[loc]
-
-        # Pixel to the left location and color
-        left_loc = (x - 1) + y * @img.width
-        left_pix = @img.pixels[left_loc]
-
-        # New color is difference between pixel and left neighbor
-        diff = (brightness(pix) - brightness(left_pix)).abs
-        @destination.pixels[loc] = color(diff) 
-      end
+def draw
+  # We are going to look at both image's pixels
+  @img.load_pixels
+  @destination.load_pixels
+
+  # Since we are looking at left neighbors
+  # We skip the first column
+  (1...width).each do |x|
+    (0...height).each do |y|
+      # Pixel location and color
+      loc = x + y * @img.width
+      pix = @img.pixels[loc]
+
+      # Pixel to the left location and color
+      left_loc = (x - 1) + y * @img.width
+      left_pix = @img.pixels[left_loc]
+
+      # New color is difference between pixel and left neighbor
+      diff = (brightness(pix) - brightness(left_pix)).abs
+      @destination.pixels[loc] = color(diff) 
     end
-
-    # We changed the pixels in @destination
-    @destination.update_pixels
-    # Display the @destination
-    image @destination, 0, 0
   end
 
+  # We changed the pixels in @destination
+  @destination.update_pixels
+  # Display the @destination
+  image @destination, 0, 0
 end
 
-PixelNeighbourDifferencesSketch.new :title => "Pixel Neighbour Differences", :width => 200, :height => 200
+
 
 

chapter_15/14_pointillism.rb

@@ -1,34 +1,29 @@
-require 'ruby-processing'
 
-class PointillismSketch < Processing::App
-
-  def setup
-    @pointillize = 10
-    @img = load_image 'sunflower.jpg'
-    background 255
-    frame_rate 200 # Let's run this one as fast as we can.
-    no_stroke
-    smooth
-  end
-
-  def draw
-    # Pick a random point
-    x, y = rand(width), rand(height)
-    loc = x + y * width
-
-    # Look up the RGB color in the source image
-    load_pixels
-    pixel = @img.pixels[loc]
-    r, g, b = red(pixel), green(pixel), blue(pixel)
-    
-    # Draw an ellipse at that location with that color
-    fill r, g, b, 100
-    # Back to shapes! Instead of setting a pixel, we use the color from a pixel to draw a circle.
-    ellipse x, y, @pointillize, @pointillize
-  end
+def setup
+  size 200, 200
+  @pointillize = 10
+  @img = load_image 'sunflower.jpg'
+  background 255
+  frame_rate 200 # Let's run this one as fast as we can.
+  no_stroke
+end
 
+def draw
+  # Pick a random point
+  x, y = rand(width), rand(height)
+  loc = x + y * width
+
+  # Look up the RGB color in the source image
+  load_pixels
+  pixel = @img.pixels[loc]
+  r, g, b = red(pixel), green(pixel), blue(pixel)
+  
+  # Draw an ellipse at that location with that color
+  fill r, g, b, 100
+  # Back to shapes! Instead of setting a pixel, we use the color from a pixel to draw a circle.
+  ellipse x, y, @pointillize, @pointillize
 end
 
-PointillismSketch.new :title => "Pointillism", :width => 200, :height => 200
+
 
 

chapter_15/15_2d_image_mapped_to_3d.rb

@@ -1,43 +1,37 @@
-require 'ruby-processing'
 
-class TwoDMappedTo3dSketch < Processing::App
-
-  def setup
-    @cellsize = 2
-    @img = load_image 'sunflower.jpg' # Load the image
-    @img.load_pixels
-    @pixels = @img.pixels
-    @cols = width / @cellsize         # Calculate number of columns
-    @rows = height / @cellsize        # Calculate number of rows
-    render_mode P3D
-    no_stroke
-    rect_mode CENTER
-  end
-
-  def draw
-    background 255
-    @cols.times do |i|                      # Begin loop for columns
-      x = i * @cellsize + @cellsize / 2     # x position
-      @rows.times do |j|                    # Begin loop for rows
-        y = j * @cellsize + @cellsize / 2   # y position
-        loc = x + y * width                 # Pixel array location
-        c = @pixels[loc]                    # Grab the color
-
-        # Calculate a z position as a function of mouse_x and pixel brightness
-        z = (mouse_x/width.to_f) * brightness(@pixels[loc]) - 100.0
+def setup
+  size 200, 200, P3D
+  @cellsize = 2
+  @img = load_image 'sunflower.jpg' # Load the image
+  @img.load_pixels
+  @pixels = @img.pixels
+  @cols = width / @cellsize         # Calculate number of columns
+  @rows = height / @cellsize        # Calculate number of rows    
+  no_stroke
+  rect_mode CENTER
+end
 
-        # Translate to the location, set fill and stroke, and draw the rect
-        push_matrix
-        translate x, y, z
-        fill c
-        rect 0, 0, @cellsize, @cellsize
-        pop_matrix
-      end
+def draw
+  background 255
+  @cols.times do |i|                      # Begin loop for columns
+    x = i * @cellsize + @cellsize / 2     # x position
+    @rows.times do |j|                    # Begin loop for rows
+      y = j * @cellsize + @cellsize / 2   # y position
+      loc = x + y * width                 # Pixel array location
+      c = @pixels[loc]                    # Grab the color
+
+      # Calculate a z position as a function of mouse_x and pixel brightness
+      z = (mouse_x/width.to_f) * brightness(@pixels[loc]) - 100.0
+
+      # Translate to the location, set fill and stroke, and draw the rect
+      push_matrix
+      translate x, y, z
+      fill c
+      rect 0, 0, @cellsize, @cellsize
+      pop_matrix
     end
   end
-
 end
 
-TwoDMappedTo3dSketch.new :title => "2d Mapped To 3d",  :width => 200,  :height => 200