perspective_camera.rb in mittsu-0.3.3

- old
+ new

@@ -20,11 +20,11 @@
 
     # Uses Focal Length (in mm) to estimate and set FOV
     # 35mm (fullframe) camera is used if frame size is not specified;
     # Formula based on http://www.bobatkins.com/photography/technical/field_of_view.html
     def set_lens(focal_length, frame_height = 24.0)
-      @fov = 2.0 * Math.rad_to_deg(Math.atan(frame_height / (focal_length * 2.0)))
+      @fov = 2.0 * Math.rad_to_deg(::Math.atan(frame_height / (focal_length * 2.0)))
       update_projection_matrix
     end
 
     # Sets an offset in a larger frustum. This is useful for multi-window or
     # multi-monitor/multi-machine setups.
@@ -70,14 +70,14 @@
 
       update_projection_matrix
     end
 
     def update_projection_matrix
-      new_fov = Math.rad_to_deg(2.0 * Math.atan(Math.tan(Math.deg_to_rad(@fov) * 0.5) / @zoom))
+      new_fov = Math.rad_to_deg(2.0 * ::Math.atan(::Math.tan(Math.deg_to_rad(@fov) * 0.5) / @zoom))
 
       if @full_width
         aspect = @full_width / @full_height
-        top = Math.tan(Math.deg_to_rad(new_fov * 0.5)) * @near
+        top = ::Math.tan(Math.deg_to_rad(new_fov * 0.5)) * @near
         bottom = -top
         left = aspect * bottom
         right = aspect * top
         width = (right - left).abs
         height = (top - bottom).abs