added camera zoom

1 files changed, 22 insertions, 0 deletions

diff --git a/camera.rb b/camera.rb
index 7e93f7e..be1e3f0 100644
--- a/camera.rb
+++ b/camera.rb
@@ -1,5 +1,23 @@
 
 class Camera
+
+  def self.zoom_level
+    @zoom_level ||= 1
+  end
+
+  def self.zoom_by zoom
+    objects.each do |object|
+      object.size *= zoom
+      object.x *= zoom
+      object.y *= zoom
+    end
+    self.move_by(Window.width/2 * (zoom-1),Window.height/2 * (zoom-1))
+    self.zoom_level *= zoom
+  end
+
+  def self.zoom_to zoom
+    self.zoom_by(zoom/self.zoom_level)
+  end
   
   def self.elasticity
     @elasticity ||= 1
@@ -61,5 +79,9 @@ class Camera
     @camera_position = array
   end
 
+  def self.zoom_level= value
+    @zoom_level = value
+  end
+
   
 end