lib/geomotion/cg_point.rb in geomotion-0.5 vs lib/geomotion/cg_point.rb in geomotion-0.7.0

@@ -10,24 +10,62 @@
   # point.rect_of_size([10, 20])  # => CGRect([10, 20], [100, 100])
   def rect_of_size(size)
     CGRect.new([self.x, self.y], size)
   end
 
+  # modified points
+  def left(dist = 0)
+    CGPoint.new(self.x - dist, self.y)
+  end
+
+  def right(dist = 0)
+    CGPoint.new(self.x + dist, self.y)
+  end
+
+  def up(dist = 0)
+    CGPoint.new(self.x, self.y - dist)
+  end
+
+  def down(dist = 0)
+    CGPoint.new(self.x, self.y + dist)
+  end
+
+  def round
+    CGPoint.new(self.x.round, self.y.round)
+  end
+
+  def inside?(rect)
+    CGRectContainsPoint(rect, self)
+  end
+
+  # operator
   def +(other)
     case other
     when CGSize
       return self.rect_of_size(other)
     when CGPoint
       return CGPoint.new(self.x + other.x, self.y + other.y)
     end
   end
 
-  def round
-    CGPoint.new(self.x.round, self.y.round)
+  def *(scale)
+    case scale
+    when Numeric
+      return CGPoint.new(self.x * scale, self.y * scale)
+    else
+      super
+    end
   end
 
-  def inside?(rect)
-    CGRectContainsPoint(rect, self)
+  # it is tempting to define this as self * (1.0/scale) but floating point
+  # errors result in too many errors
+  def /(scale)
+    case scale
+    when Numeric
+      return CGPoint.new(self.x / scale, self.y / scale)
+    else
+      super
+    end
   end
 
   def ==(point)
     point.is_a?(CGPoint) && CGPointEqualToPoint(self, point)
   end