no more

Author: monkstone

contributed/gravity.rb

@@ -59,7 +59,7 @@ def initialize(x, y, mass)
   def collect_force
     @x_accel, @y_accel = 0, 0
     @min_dist = 1000
-    $app.particles.each do |p|
+    Propane.app.particles.each do |p|
       next if p == self
       g_dist  = hypot(x0 - p.x0, y0 - p.y0)
       g_theta = -angle_of(x0, y0, p.x0, p.y0)
@@ -80,7 +80,7 @@ def move
   end
 
   def grabbed?
-    $app.grabbed == self
+    Propane.app.grabbed == self
   end
 
   def run

examples/forwardable_module_examples/pbox2d/distance_joint/distance_joint.rb

@@ -0,0 +1,46 @@
+#!/usr/bin/env jruby -v -W2
+require 'propane'
+require 'pbox2d'
+require 'forwardable'
+
+# The Nature of Code
+# Daniel Shiffman
+# http://natureofcode.com
+
+# Example demonstrating distance joints
+# A bridge is formed by connected a series of particles with joints
+class DistanceJoint < Propane::App
+  load_library :distance_joint
+
+  attr_reader :box2d, :boundaries, :system
+
+  def settings
+    size(640, 360)
+  end
+
+  def setup
+    sketch_title 'Distance Joint'
+    # Initialize box2d physics and create the world
+    @box2d = WorldBuilder.build(app: self)
+    @system = ParticleSystem.new
+    @boundaries = []
+    # Add a bunch of fixed boundaries
+    boundaries << Boundary.new(width / 4, height - 5, width / 2 - 50, 10)
+    boundaries << Boundary.new(3 * width / 4, height - 50, width / 2 - 50, 10)
+  end
+
+  def draw
+    background(255)
+    system.run
+    # Display all the boundaries
+    boundaries.each(&:display)
+    fill(0)
+    text('Click mouse to add connected particles.', 10, 20)
+  end
+
+  def mouse_pressed
+    system.add_pair(mouse_x, mouse_y)
+  end
+end
+
+DistanceJoint.new

examples/forwardable_module_examples/pbox2d/distance_joint/library/distance_joint/distance_joint.rb

@@ -0,0 +1,4 @@
+require_relative 'lib/boundary'
+require_relative 'lib/pair'
+require_relative 'lib/particle'
+require_relative 'lib/particle_system'

…ry/gem/pbox2d/distance_joint/boundary.rb …t/library/distance_joint/lib/boundary.rbexternal_library/gem/pbox2d/distance_joint/boundary.rb renamed to examples/forwardable_module_examples/pbox2d/distance_joint/library/distance_joint/lib/boundary.rb external_library/gem/pbox2d/distance_joint/boundary.rb renamed to examples/forwardable_module_examples/pbox2d/distance_joint/library/distance_joint/lib/boundary.rb

@@ -13,7 +13,7 @@ class Boundary
 
   def initialize(x, y, w, h)
     @x, @y, @w, @h = x, y, w, h
-    @app = $app
+    @app = Propane.app
     # Define the polygon
     sd = PolygonShape.new
     # Figure out the box2d coordinates

…ibrary/gem/pbox2d/distance_joint/pair.rb …joint/library/distance_joint/lib/pair.rbexternal_library/gem/pbox2d/distance_joint/pair.rb renamed to examples/forwardable_module_examples/pbox2d/distance_joint/library/distance_joint/lib/pair.rb external_library/gem/pbox2d/distance_joint/pair.rb renamed to examples/forwardable_module_examples/pbox2d/distance_joint/library/distance_joint/lib/pair.rb

@@ -9,7 +9,7 @@ class Pair
   attr_reader :p1, :p2, :len, :joint
   # Chain constructor
   def initialize(x, y)
-    @app = $app
+    @app = Propane.app
     @len = 32
     @p1 = Particle.new(x, y)
     @p2 = Particle.new(x + rand(-1..1.0), y + rand(-1..1.0))

…ry/gem/pbox2d/distance_joint/particle.rb …t/library/distance_joint/lib/particle.rbexternal_library/gem/pbox2d/distance_joint/particle.rb renamed to examples/forwardable_module_examples/pbox2d/distance_joint/library/distance_joint/lib/particle.rb external_library/gem/pbox2d/distance_joint/particle.rb renamed to examples/forwardable_module_examples/pbox2d/distance_joint/library/distance_joint/lib/particle.rb

@@ -12,7 +12,7 @@ class Particle
 
   def initialize(x, y)
     @r = 8
-    @app = $app
+    @app = Propane.app
     # Define a body
     bd = BodyDef.new
     # Set its position

…pbox2d/distance_joint/particle_system.rb …ry/distance_joint/lib/particle_system.rbexternal_library/gem/pbox2d/distance_joint/particle_system.rb renamed to examples/forwardable_module_examples/pbox2d/distance_joint/library/distance_joint/lib/particle_system.rb external_library/gem/pbox2d/distance_joint/particle_system.rb renamed to examples/forwardable_module_examples/pbox2d/distance_joint/library/distance_joint/lib/particle_system.rb

@@ -0,0 +1,4 @@
+require_relative 'lib/box'
+require_relative 'lib/boundary'
+require_relative 'lib/spring'
+require_relative 'lib/dummy_spring'

examples/forwardable_module_examples/pbox2d/mouse_joint/library/mouse_joint.rb

@@ -12,7 +12,7 @@ class Boundary
 
   def initialize(x, y, w, h, a)
     @x, @y, @w, @h, @a = x, y, w, h, a
-    @app = $app
+    @app = Propane.app
     # Define the polygon
     sd = PolygonShape.new
     # Figure out the box2d coordinates

…brary/gem/pbox2d/mouse_joint/boundary.rb …oint/library/mouse_joint/lib/boundary.rbexternal_library/gem/pbox2d/mouse_joint/boundary.rb renamed to examples/forwardable_module_examples/pbox2d/mouse_joint/library/mouse_joint/lib/boundary.rb external_library/gem/pbox2d/mouse_joint/boundary.rb renamed to examples/forwardable_module_examples/pbox2d/mouse_joint/library/mouse_joint/lib/boundary.rb

@@ -11,7 +11,7 @@ class Box
   attr_accessor :body, :w, :h
   # Constructor
   def initialize(x, y)
-    @app = $app
+    @app = Propane.app
     @w, @h = 24, 24
     # Add the box to the box2d world
     make_body(Vec2.new(x, y), w, h)