lib/geometry2D.rb in xrvg-0.0.5 vs lib/geometry2D.rb in xrvg-0.0.6

@@ -1,11 +1,11 @@
 #
 # Contains Ruby geometric V2D 2D class. 
 # See :
 # - +V2D+
 
-require 'Attributable'
+require 'attributable'
 
 module XRVG
 #
 # 2D vector
 #
@@ -125,12 +125,12 @@
 
   # compute the angle of a vector considering x axis.
   #  V2D[0.0,2.0].angle => 0.0
   def angle
     r = self.r()
-    if r == 0
-      return 0
+    if r == 0.0
+      return 0.0
     else
       unitary = self/r
       cos, sin = unitary.x, unitary.y
       angle = Math.acos( cos )
       if sin < 0.0
@@ -172,9 +172,16 @@
 
   # compute the symetric of vector "other" considering self as symetry center
   #  V2D[1.0,2.0].sym( V2D[0.0,0.0] ) => V2D[2.0,4.0]
   def sym( other )
     return self * 2.0 - other
+  end
+
+  # compute the symetric of point "self" considering (point,v) as symetry axis
+  def axesym( point, axev )
+    v = self - point
+    angle = V2D.angle( v, axev )
+    return point + v.rotate( -2.0 * angle )
   end
 
   # coords management between different coord systems (for the moment only euclidian and polar)
   #  V2D[0.0,1.0].coords         => [0.0,1.0]
   #  V2D[0.0,1.0].coords(:polar) => [1.0,Math::PI/2.0]