Give Vector constructors from one higher/lower dimension

[libs/math.git] / source / linal / vector.h

diff --git a/source/linal/vector.h b/source/linal/vector.h
index 369e3ff2435bf44e597e9e9750b4dc1a03d1c10b..a5c9a26cfc1e8152fd4cece0158aa553f3b97c8d 100644 (file)
--- a/source/linal/vector.h
+++ b/source/linal/vector.h
@@ -81,6 +81,10 @@ public:
        Vector(T, T, T, T);
        template<typename U>
        Vector(const Vector<U, N> &);
+       template<typename U>
+       Vector(const Vector<U, N-1> &, U);
+       template<typename U>
+       explicit Vector(const Vector<U, N+1> &);
 
        Vector &operator*=(T);
        Vector &operator/=(T);
@@ -140,6 +144,23 @@ inline Vector<T, N>::Vector(const Vector<U, N> &v)
                (*this)[i] = v[i];
 }
 
+template<typename T, unsigned N>
+template<typename U>
+inline Vector<T, N>::Vector(const Vector<U, N-1> &v, U s)
+{
+       for(unsigned i=0; i<N-1; ++i)
+               (*this)[i] = v[i];
+       (*this)[N-1] = s;
+}
+
+template<typename T, unsigned N>
+template<typename U>
+inline Vector<T, N>::Vector(const Vector<U, N+1> &v)
+{
+       for(unsigned i=0; i<N; ++i)
+               (*this)[i] = v[i];
+}
+
 template<typename T, unsigned N>
 inline Vector<T, N> &Vector<T, N>::operator*=(T s)
 {