modified: samples/processing_app/basics/math/double_random.rb

	modified:   samples/processing_app/basics/math/increment_decrement.rb
	modified:   samples/processing_app/basics/math/polar_to_cartesian.rb

Author: monkstone

samples/processing_app/basics/math/double_random.rb

@@ -1,31 +1,29 @@
-# Double Random 
-# by Ira Greenberg.  
-# 
-# Using two rand(..) calls and the point() function to 
-# create an irregular sawtooth line. The noise line guards 
-# against an illegal input to rand range when min > max, 
-# and to return min as vanilla processing does 
+# Double Random
+# by Ira Greenberg.
+#
+# Using two rand(..) calls and the point() function to
+# create an irregular sawtooth line. The noise line guards
+# against an illegal input to rand range when min > max,
+# and to return min as vanilla processing does
 # (NB: the sawtooth relies on this)
 
 attr_reader :steps
 
-def setup  
-  size 640, 360  
-  frame_rate(1) 
-  total_pts = 300  
+def setup
+  size 640, 360
+  frame_rate(1)
+  total_pts = 300
   @steps = total_pts + 1.0
   stroke_weight 2
-  stroke 255  
+  stroke 255
 end
 
 def draw
   background 0
-  rand_y = 0.0  
-  (1 ... steps).each do |i|
-    noise_y = (rand_y > 0)? rand(-rand_y..rand_y) : rand(rand_y..-rand_y)    
-    point( (width/steps) * i, (height/2) + noise_y )
-    rand_y += rand(-5..5)  
+  rand_y = 0.0
+  (1...steps).each do |i|
+    noise_y = (rand_y > 0) ? rand(-rand_y..rand_y) : rand(rand_y..-rand_y)
+    point((width / steps) * i, (height / 2) + noise_y)
+    rand_y += rand(-5..5.0)
   end
 end
-
-

samples/processing_app/basics/math/increment_decrement.rb

@@ -1,54 +1,31 @@
-# Increment Decrement. 
-# 
+# Increment Decrement.
+#
 # In Java and C ...
-# Writing "a++" is equivalent to "a = a + 1".  
-# Writing "a--" is equivalent to "a = a - 1". 
+# Writing "a++" is equivalent to "a = a + 1".
+# Writing "a--" is equivalent to "a = a - 1".
 
 # In Ruby there is += 1 and -= 1:
 # a += 1 is equal to a = a + 1
 
-
 def setup
-  
   size 640, 360
-  
   color_mode RGB, width
-  
   @a = 0
   @b = width
-  @direction = false
-  
+  @direction = true
   frame_rate 30
-  
 end
 
 def draw
-  
   @a += 1
-  
   if @a > width
     @a = 0
     @direction = !@direction
   end
-  
-  if @direction
-    stroke @a
-  else
-    stroke width-@a
-  end
-  
-  line @a, 0, @a, height/2
-  
+  stroke(@direction ? width - @a : @a)
+  line @a, 0, @a, height / 2
   @b -= 1
-  
   @b = width if @b < 0
-  
-  if @direction
-    stroke width-@b
-  else
-    stroke @b
-  end
-  
-  line @b, height/2+1, @b, height
-  
+  stroke(@direction ? width - @b : @b)
+  line @b, height / 2 + 1, @b, height
 end

samples/processing_app/basics/math/polar_to_cartesian.rb

@@ -1,31 +1,30 @@
 # PolarToCartesian
-# by Daniel Shiffman.  
-# 
-# Convert a polar coordinate (r,theta) to cartesian (x,y):  
+# by Daniel Shiffman.
+#
+# Convert a polar coordinate (r,theta) to cartesian (x,y):
 # x = r * cos(theta)
 # y = r * sin(theta)
 attr_reader :r, :theta
 
-def setup  
-  size 640, 360  
+def setup
+  size 640, 360
   frame_rate 30
   @r = height * 0.45
   @theta = 0.0
   @theta_vel = 0.0
   @theta_acc = 0.1e-3
 end
 
-def draw  
-  background 0  
-  translate width/2, height/2 
+def draw
+  background 0
+  translate width / 2, height / 2
   # Convert polar to cartesian
   x = r * cos(theta)
-  y = r * sin(theta)  
+  y = r * sin(theta)
   ellipse_mode CENTER
   no_stroke
   fill 200
-  ellipse x, y, 32, 32  
+  ellipse x, y, 32, 32
   @theta_vel += @theta_acc
-  @theta += @theta_vel  
+  @theta += @theta_vel
 end
-