1 files changed, 166 insertions, 0 deletions
diff --git a/samples/04_physics_and_collisions/09_arbitrary_collision/app/ball.rb b/samples/04_physics_and_collisions/09_arbitrary_collision/app/ball.rb
new file mode 100644
index 0000000..cc50b18
--- /dev/null
+++ b/samples/04_physics_and_collisions/09_arbitrary_collision/app/ball.rb
@@ -0,0 +1,166 @@
+
+class Ball
+    attr_accessor :velocity, :child, :parent, :number, :leastChain
+    attr_reader :x, :y, :hypotenuse, :width, :height
+
+    def initialize args, number, leastChain, parent, child
+        #Start the ball in the top center
+        @number = number
+        @leastChain = leastChain
+        @x = args.grid.w / 2
+        @y = args.grid.h - 20
+
+        @velocity = Vector2d.new(2, -2)
+        @width =  10
+        @height = 10
+
+        @left_wall = (args.state.board_width + args.grid.w / 8)
+        @right_wall = @left_wall + args.state.board_width
+
+        @max_velocity = MAX_VELOCITY
+
+        @child = child
+        @parent = parent
+
+        @past = [{x: @x, y: @y}]
+        @next = nil
+    end
+
+    def reassignLeastChain (lc=nil)
+      if (lc == nil)
+        lc = @number
+      end
+      @leastChain = lc
+      if (parent != nil)
+        @parent.reassignLeastChain(lc)
+      end
+
+    end
+
+    def makeLeader args
+      if isLeader
+        return
+      end
+      @parent.reassignLeastChain
+      args.state.ballParents.push(self)
+      @parent = nil
+
+    end
+
+    def isLeader
+      return (parent == nil)
+    end
+
+    def receiveNext (p)
+      #trace!
+      if parent != nil
+        @x = p[:x]
+        @y = p[:y]
+        @velocity = p[:velocity]
+        #puts @x.to_s + "|" + @y.to_s + "|"[email protected]_s
+        @past.append(p)
+        if (@past.length >= BALL_DISTANCE)
+          if (@child != nil)
+            @child.receiveNext(@past[0])
+            @past.shift
+          end
+        end
+      end
+    end
+
+    #Move the ball according to its velocity
+    def update args
+
+        if isLeader
+          wallBounds args
+          @x += @velocity.x
+          @y += @velocity.y
+          @past.append({x: @x, y: @y, velocity: @velocity})
+          #puts @past
+
+          if (@past.length >= BALL_DISTANCE)
+            if (@child != nil)
+              @child.receiveNext(@past[0])
+              @past.shift
+            end
+          end
+
+        else
+          puts "unexpected"
+          raise "unexpected"
+        end
+    end
+
+    def wallBounds args
+        b= false
+        if @x < @left_wall
+          @velocity.x = @velocity.x.abs() * 1
+          b=true
+        elsif @x + @width > @right_wall
+          @velocity.x = @velocity.x.abs() * -1
+          b=true
+        end
+        if @y < 0
+          @velocity.y = @velocity.y.abs() * 1
+          b=true
+        elsif @y + @height > args.grid.h
+          @velocity.y = @velocity.y.abs() * -1
+          b=true
+        end
+        mag = (@velocity.x**2.0 + @velocity.y**2.0)**0.5
+        if (b == true && mag < MAX_VELOCITY)
+          @velocity.x*=1.1;
+          @velocity.y*=1.1;
+        end
+
+    end
+
+    #render the ball to the screen
+    def draw args
+
+        #update args
+        #args.outputs.solids << [@x, @y, @width, @height, 255, 255, 0];
+        #args.outputs.sprits << {
+          #x: @x,
+          #y: @y,
+          #w: @width,
+          #h: @height,
+          #path: "sprites/ball10.png"
+        #}
+        #args.outputs.sprites <<[@x, @y, @width, @height, "sprites/ball10.png"]
+        args.outputs.sprites << {x: @x, y: @y, w: @width, h: @height, path:"sprites/ball10.png" }
+    end
+
+    def getDraw args
+      #wallBounds args
+      #update args
+      #args.outputs.labels << [@x, @y, @number.to_s + "|" + @leastChain.to_s]
+      return [@x, @y, @width, @height, "sprites/ball10.png"]
+    end
+
+    def getPoints args
+      points = [
+        {x:@x+@width/2, y: @y},
+        {x:@x+@width, y:@y+@height/2},
+        {x:@x+@width/2,y:@y+@height},
+        {x:@x,y:@y+@height/2}
+      ]
+      #psize = 5.0
+      #for p in points
+        #args.outputs.solids << [p.x-psize/2.0, p.y-psize/2.0, psize, psize, 0, 0, 0];
+      #end
+      return points
+    end
+
+    def serialize
+      {x: @x, y:@y}
+    end
+
+    def inspect
+      serialize.to_s
+    end
+
+    def to_s
+      serialize.to_s
+    end
+  end