Index: trunk/MagicSoft/Mars/mpointing/MSrcPosCam.cc
===================================================================
--- trunk/MagicSoft/Mars/mpointing/MSrcPosCam.cc	(revision 7115)
+++ trunk/MagicSoft/Mars/mpointing/MSrcPosCam.cc	(revision 7142)
@@ -62,5 +62,5 @@
 // Copy constructor, set default name and title
 //
-MSrcPosCam::MSrcPosCam(const MSrcPosCam &p) : fX(p.fX), fY(p,fY)
+MSrcPosCam::MSrcPosCam(const MSrcPosCam &p) : fX(p.fX), fY(p.fY)
 {
     fName  = gsDefName.Data();
@@ -69,4 +69,6 @@
 
 // -----------------------------------------------------------------------
+//
+// Print contents
 //
 void MSrcPosCam::Print(Option_t *) const
@@ -78,4 +80,8 @@
 }
 
+// -----------------------------------------------------------------------
+//
+// Set fX to v.X() and fY to v.Y()
+//
 void MSrcPosCam::SetXY(const TVector2 &v)
 {
@@ -84,4 +90,18 @@
 }
 
+// -----------------------------------------------------------------------
+//
+// Add v.X() to fX and v.Y() to fY
+//
+void MSrcPosCam::Add(const TVector2 &v)
+{
+    fX+=v.X();
+    fY+=v.Y();
+}
+
+// -----------------------------------------------------------------------
+//
+// Get TVector2(fX, fY)
+//
 TVector2 MSrcPosCam::GetXY() const
 {
Index: trunk/MagicSoft/Mars/mpointing/MSrcPosCam.h
===================================================================
--- trunk/MagicSoft/Mars/mpointing/MSrcPosCam.h	(revision 7115)
+++ trunk/MagicSoft/Mars/mpointing/MSrcPosCam.h	(revision 7142)
@@ -25,7 +25,10 @@
     void SetXY(const TVector2 &v);
 
+    void Add(const TVector2 &v);
+
     Float_t GetX() const             { return fX; }
     Float_t GetY() const             { return fY; }
     TVector2 GetXY() const;
+
 
     void Print(Option_t *opt=NULL) const;
Index: trunk/MagicSoft/Mars/mpointing/Makefile
===================================================================
--- trunk/MagicSoft/Mars/mpointing/Makefile	(revision 7115)
+++ trunk/MagicSoft/Mars/mpointing/Makefile	(revision 7142)
@@ -28,4 +28,5 @@
            MSrcPosCam.cc \
            MSrcPosCalc.cc \
+           MSrcPosCorrect.cc \
            MSrcPosFromModel.cc