X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;f=source%2Flinal%2Fvector.h;h=c9b2a179fe5fd0ce595e4dda796b3c2d7b13ab5d;hb=9ab061034720c1c0db4e8bff5dae4191ccd2a26f;hp=152c26e66482e943e5837c5ddecc54fc9e7c2fde;hpb=5797fe0a5296952cb8f8643fdc6cabddee19a554;p=libs%2Fmath.git

diff --git a/source/linal/vector.h b/source/linal/vector.h
index 152c26e..c9b2a17 100644
--- a/source/linal/vector.h
+++ b/source/linal/vector.h
@@ -3,6 +3,7 @@
 
 #include <algorithm>
 #include <cmath>
+#include <ostream>
 
 namespace Msp {
 namespace LinAl {
@@ -78,6 +79,11 @@ public:
 
 	Vector();
 	Vector(const T *);
+
+	/** Constructs a vector from an array of interleaved values.  Intended for
+	use by Matrix row accessor. */
+	Vector(const T *, unsigned);
+
 	Vector(T, T);
 	Vector(T, T, T);
 	Vector(T, T, T, T);
@@ -113,6 +119,13 @@ inline Vector<T, N>::Vector(const T *d)
 		(*this)[i] = d[i];
 }
 
+template<typename T, unsigned N>
+inline Vector<T, N>::Vector(const T *d, unsigned stride)
+{
+	for(unsigned i=0; i<N; ++i)
+		(*this)[i] = d[i*stride];
+}
+
 /* The compiler won't instantiate these unless they are used.  Trying to use
 them on the wrong class results in an error. */
 template<typename T, unsigned N>
@@ -313,6 +326,20 @@ inline Vector<T, 3> cross(const Vector<T, 3> &v1, const Vector<T, 3> &v2)
 	return Vector<T, 3>(v1.y*v2.z-v1.z*v2.y, v1.z*v2.x-v1.x*v2.z, v1.x*v2.y-v1.y*v2.x);
 }
 
+template<typename T, unsigned N>
+inline std::ostream &operator<<(std::ostream &s, const Vector<T, N> &v)
+{
+	s << "Vector" << N << '(';
+	for(unsigned i=0; i<N; ++i)
+	{
+		if(i)
+			s << ", ";
+		s << v[i];
+	}
+	s << ')';
+	return s;
+}
+
 } // namespace LinAl
 } // namespace Msp