diff --git a/owlps-positioner/src/point3d.cc b/owlps-positioner/src/point3d.cc
index 8c9cea5..256eb0e 100644
--- a/owlps-positioner/src/point3d.cc
+++ b/owlps-positioner/src/point3d.cc
@@ -54,21 +54,6 @@ float Point3D::square_distance(const Point3D &source) const
 }
 
 
-/**
- * The distance is not square rooted after the computation, in order
- * to optimise comparisons.
- */
-float Point3D::square_distance(const float _x,
-                               const float _y,
-                               const float _z) const
-{
-  return
-    (x - _x) * (x - _x) +
-    (y - _y) * (y - _y) +
-    (z - _z) * (z - _z) ;
-}
-
-
 /**
  * A, B and C are three points, A being the current Point3D (*this).
  * If the points are aligned, the angle returned is always 0° (and not
diff --git a/owlps-positioner/src/point3d.hh b/owlps-positioner/src/point3d.hh
index 543e841..a46d761 100644
--- a/owlps-positioner/src/point3d.hh
+++ b/owlps-positioner/src/point3d.hh
@@ -57,14 +57,6 @@ public:
   float square_distance(const Point3D &p) const ;
   /// Euclidean distance to a Point3D
   float distance(const Point3D &p) const ;
-  /// Square euclidean distance to a 3-float defined point
-  float square_distance(const float mx,
-                        const float my,
-                        const float mz) const ;
-  /// Euclidean distance to a 3-float defined point
-  float distance(const float mx,
-                 const float my,
-                 const float mz) const ;
   /// Euclidean distance to the radius of a sphere
   float distance_to_sphere(const Point3D &centre,
                            const float radius) const ;
@@ -180,18 +172,6 @@ inline float Point3D::distance(const Point3D &source) const
 }
 
 
-/**
- * Note: to compare distances, use preferably square_distance(),
- * which is more efficient.
- */
-inline float Point3D::distance(const float _x,
-                               const float _y,
-                               const float _z) const
-{
-  return sqrt(square_distance(_x, _y, _z)) ;
-}
-
-
 /**
  * @param centre The centre of the sphere.
  * @param radius The radius of the sphere.