downgrade sketch to work with ruby-processing

Author: monkstone

samples/processing_app/basics/modules/euler_ball.rb

@@ -14,12 +14,12 @@ class EulerBall
   include Processing::Proxy, Runner
   attr_reader :pos, :spd, :radius, :bounds_x, :bounds_y
 
-  def initialize(position:, speed:, radius:)
+  def initialize(position, speed, radius)
     @pos = position
     @spd = speed
     @radius = radius
-    @bounds_x = Bounds.new(lower: radius, upper: width - radius)
-    @bounds_y = Bounds.new(lower: radius, upper: height - radius)
+    @bounds_x = Bounds.new(radius, $app.width - radius)
+    @bounds_y = Bounds.new(radius, $app.height - radius)
   end
 
   def move
@@ -42,7 +42,7 @@ def bounds_collision
 class Bounds
   include Processing::MathTool
   attr_reader :low, :high, :inside
-  def initialize(lower:, upper:)
+  def initialize(lower, upper)
     @low = lower
     @high = upper
     @inside = true

samples/processing_app/basics/modules/euler_integration.rb

@@ -2,19 +2,21 @@
 # Euler Integration (v01)
 # pos  +=  spd
 # sketch after Ira Greenwood 
-# Features first class keyword arguments, and use of modules
+# Features use of modules
 #
+load_library :vecmath
 require_relative 'euler_ball'
 
 attr_reader :ball
 
 def setup
-  sketch_title 'Euler Integration'
+  size(400, 400)
+  smooth 4
   @ball = EulerBall.new(
-    position: Vec2D.new(width / 2, height / 2),
+    Vec2D.new(width / 2, height / 2),
     # create a random direction vector, scaled by 3
-    speed: Vec2D.random * 3,
-    radius: 10
+    Vec2D.random * 3,
+    10
   )
 end
 
@@ -25,8 +27,3 @@ def draw
   fill(0)
   ball.run
 end
-
-def settings
-  size(400, 400)
-  smooth 4
-end