lib/explosion.rb in missile-command-ruby-0.0.5 vs lib/explosion.rb in missile-command-ruby-0.0.6

@@ -1,7 +1,8 @@
 class Explosion < Actor
-  attr_reader :collision_radius
+  use InterpolationSystem
+  collides_as :explosion
 
   def initialize(opts={})
     super
     set_image('explosion.png', opts)
     @initial_radius = 10.0
@@ -9,18 +10,19 @@
     @explosion_time = 3.0
     @fade_after = 0.5
 
     interpolate_alpha(:init => 255, :end => 0, :duration => @explosion_time - @fade_after, :start_in => @fade_after)
     interpolate_saturation(:init => 0.0, :end => 1.0, :duration => 0.1, :loop => true)
-    # Don't know why gosu changes my hue when transforming saturation
-    # alone so we keep it fixed, or give it a little space for change
+    # Don't know why gosu changes my hue when only transforming
+    # saturation so we keep it fixed, or give it a little space for
+    # change
     interpolate_hue(:init => @color.hue-50, :end => @color.hue+50, :loop => true, :duration => 0.5)
 
     self.radius = @initial_radius
     # Expand or shrink the explosion
     interpolate(self, :radius, :init => @initial_radius, :end => @end_radius, :duration => @explosion_time)
-    collides_as :explosion
+
     @z = 7
     @elapsed_time = 0.0
   end
 
   def update
@@ -28,9 +30,13 @@
     super
     if @elapsed_time > @explosion_time
       die
     end
     @elapsed_time += dt
+  end
+
+  def collision_radius
+    @collision_radius
   end
 
   def radius=(radius)
     @collision_radius = radius
     @factor_x = 2*radius/@image.width