lib/vector3.rb in gmath3D-0.2.2 vs lib/vector3.rb in gmath3D-0.2.3

@@ -1,5 +1,6 @@
+# -*- coding: cp932 -*-
 require 'gmath3D'
 
 module GMath3D
   #
   # Vector3 represents a point or a vector on 3D space.
@@ -47,10 +48,16 @@
     end
     def eql?(rhs)
       equals_inner(rhs)
     end
 
+    # [Output]
+    #  return axially aligned bounding box as Box.
+    def box
+      return Box.new(self, self)
+    end
+
     # [Input]
     #  _rhs_ should be Vector3.
     # [Output]
     #  return added result as Vector3.
     def +(rhs)
@@ -98,9 +105,26 @@
       Util.check_arg_type(Vector3, rhs)
       Vector3.new(
               self.y*rhs.z - self.z*rhs.y,
               self.z*rhs.x - self.x*rhs.z,
               self.x*rhs.y - self.y*rhs.x)
+    end
+
+    # [Output]
+    #  return orthogonal vector as Vector3.
+    def arbitrary_orthogonal
+      return Vector3.new() if(self.length < self.tolerance)
+
+      if(!self.parallel?( Vector3.new(0.0, 1.0, 0.0) ))
+        un_parallel_vec = Vector3.new(0.0,1.0,0.0)
+      elsif(!self.parallel?( Vector3.new(0.0,0.0,1.0) ))
+        un_parallel_vec = Vector3.new(0.0,0.0,1.0)
+      else
+	un_parallel_vec = Vector3.new(1.0,0.0,0.0)
+      end
+
+      orthogonal = self.cross(un_parallel_vec)
+      return orthogonal.normalize
     end
 
     # [Output]
     #  return vector length as Numeric
     def length