--- a/Framework/Toolbox/CoordinateSystem3D.h	Thu Feb 08 15:22:35 2018 +0100
+++ b/Framework/Toolbox/CoordinateSystem3D.h	Fri Feb 09 16:00:29 2018 +0100
@@ -35,6 +35,7 @@
     Vector    normal_;
     Vector    axisX_;
     Vector    axisY_;
+    double    d_;
 
     void CheckAndComputeNormal();
 
@@ -43,6 +44,8 @@
 
     void SetupCanonical();
 
+    double GetOffset() const;
+
   public:
     CoordinateSystem3D()
     {
@@ -95,5 +98,9 @@
     bool IntersectSegment(Vector& p,
                           const Vector& edgeFrom,
                           const Vector& edgeTo) const;
+
+    bool IntersectLine(Vector& p,
+                       const Vector& origin,
+                       const Vector& direction) const;
   };
 }