X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;f=source%2Flinal%2Fvector.h;h=6dfe6ca0167fb3e1d57e65217003e3d700f6a3b3;hb=65b26478a62b8d715ec415164fff25fafcb35fc1;hp=9ef46fde412f22804535065d6dd59c10b11963e2;hpb=643aa7b2317f88463f66da11e595ebe0f6c9621d;p=libs%2Fmath.git

diff --git a/source/linal/vector.h b/source/linal/vector.h
index 9ef46fd..6dfe6ca 100644
--- a/source/linal/vector.h
+++ b/source/linal/vector.h
@@ -81,10 +81,9 @@ 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> &);
+
+	template<unsigned M>
+	Vector<T, M> slice(unsigned) const;
 
 	Vector &operator*=(T);
 	Vector &operator/=(T);
@@ -145,20 +144,44 @@ inline Vector<T, N>::Vector(const Vector<U, N> &v)
 }
 
 template<typename T, unsigned N>
-template<typename U>
-inline Vector<T, N>::Vector(const Vector<U, N-1> &v, U s)
+inline Vector<T, N+1> compose(const Vector<T, N> &v, T s)
 {
-	for(unsigned i=0; i<N-1; ++i)
-		(*this)[i] = v[i];
-	(*this)[N-1] = s;
+	Vector<T, N+1> r;
+	for(unsigned i=0; i<N; ++i)
+		r[i] = v[i];
+	r[N] = s;
+	return r;
 }
 
 template<typename T, unsigned N>
-template<typename U>
-inline Vector<T, N>::Vector(const Vector<U, N+1> &v)
+inline Vector<T, N+1> compose(T s, const Vector<T, N> &v)
 {
+	Vector<T, N+1> r;
 	for(unsigned i=0; i<N; ++i)
-		(*this)[i] = v[i];
+		r[i] = v[i];
+	r[N] = s;
+	return r;
+}
+
+template<typename T, unsigned N, unsigned M>
+inline Vector<T, N+M> compose(const Vector<T, N> &v1, const Vector<T, M> &v2)
+{
+	Vector<T, N+M> r;
+	for(unsigned i=0; i<N; ++i)
+		r[i] = v1[i];
+	for(unsigned i=0; i<M; ++i)
+		r[N+i] = v2[i];
+	return r;
+}
+
+template<typename T, unsigned N>
+template<unsigned M>
+inline Vector<T, M> Vector<T, N>::slice(unsigned j) const
+{
+	Vector<T, M> r;
+	for(unsigned i=0; i<M; ++i)
+		r[i] = (*this)[j+i];
+	return r;
 }
 
 template<typename T, unsigned N>