[Toon-members] TooN helpers.h

[Edward Rosten]

CVSROOT:        /cvsroot/toon
Module name:    TooN
Changes by:     Edward Rosten <edrosten>        09/11/02 17:13:44

Modified files:
        .              : helpers.h 

Log message:
        Reinstated old, horrible normalize-in-place for vectors since removal 
        breaks too much old code.

CVSWeb URLs:
http://cvs.savannah.gnu.org/viewcvs/TooN/helpers.h?cvsroot=toon&r1=1.84&r2=1.85

Patches:
Index: helpers.h
===================================================================
RCS file: /cvsroot/toon/TooN/helpers.h,v
retrieving revision 1.84
retrieving revision 1.85
diff -u -b -r1.84 -r1.85
--- helpers.h   31 Oct 2009 11:32:10 -0000      1.84
+++ helpers.h   2 Nov 2009 17:13:44 -0000       1.85
@@ -89,15 +89,28 @@
                return v * (1/sqrt(v*v));
        }
        
+       //Note because of the overload later, this function will ONLY receive 
sliced vectors. Therefore
+       //a copy can be made, which is still a slice, so operating on the copy 
operates on the original
+       //data.
        ///Normalize a vector in place
        ///@param v Vector to normalize
        ///@ingroup gLinAlg
-       template<int Size, class Precision, class Base> inline void 
normalize(Vector<Size, Precision, Base>& v)
+       template<int Size, class Precision, class Base> inline void 
normalize(Vector<Size, Precision, Base> v)
        {
                using std::sqrt;
                v /= sqrt(v*v);
        }
        
+       //This overload is required to operate on non-slice vectors
+       /**
+               \overload
+       */  
+       template<int Size, class Precision> inline void normalize(Vector<Size, 
Precision> & v)
+       {
+               normalize(v.as_slice());
+       }
+
+
        ///For a vector \e v of length \e i, return \f$[v_1, v_2, \cdots, 
v_{i-1}] / v_i \f$
        ///@param v \e v
        ///@ingroup gLinAlg