lib/ray/view.rb in ray-0.1.1 vs lib/ray/view.rb in ray-0.2.0

@@ -1,7 +1,25 @@
 module Ray
   class View
+    include Ray::PP
+
+    # @param [Ray::Rect] rect Rect to show, in pixels.
+    # @param [Ray::Vector2] target_size Size of the complete target, in pixels.
+    #
+    # @return [Ray::View] A view that allows to clip rendering to a given region
+    #   of the target, without scaling.
+    def self.clip(rect, target_size)
+      rect, target_size = rect.to_rect, target_size.to_vector2
+
+      viewport = Ray::Rect[rect.x / target_size.w,
+                           rect.y / target_size.h,
+                           rect.w / target_size.w,
+                           rect.h / target_size.y]
+
+     Ray::View.new(rect.center, rect.size, viewport)
+    end
+
     def ==(other)
       other.is_a?(Ray::View) && self.matrix == other.matrix
     end
 
     # Increases zoom (making object appear bigger). The center of the view and
@@ -40,8 +58,12 @@
     def w=(val); self.size   = [val, h]; end
     def h=(val); self.size   = [w, val]; end
 
     def inspect
       "#<#{self.class} center=#{center} size=#{size} viewport=#{viewport}>"
+    end
+
+    def pretty_print(q)
+      pretty_print_attributes q, ["center", "size", "matrix", "viewport"]
     end
   end
 end