X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;f=source%2Flinal%2Fmatrix.h;h=f18eb2f4cfb52504214b84015688e46d0d7be121;hb=77edbd42b918f3448ab4004dfe96b8a96621c348;hp=ff73165d02c703c0efe263b27f23a522c54b7383;hpb=b60ee0fb060790277bfc68722f85a137a58ad771;p=libs%2Fmath.git

diff --git a/source/linal/matrix.h b/source/linal/matrix.h
index ff73165..f18eb2f 100644
--- a/source/linal/matrix.h
+++ b/source/linal/matrix.h
@@ -8,7 +8,7 @@ namespace Msp {
 namespace LinAl {
 
 /**
-A general mathematical matrix.
+A general mathematical matrix with M rows and N columns.
 */
 template<typename T, unsigned M, unsigned N>
 class Matrix
@@ -54,9 +54,11 @@ inline Matrix<T, M, N>::Matrix(const T *d)
 
 template<typename T, unsigned M, unsigned N>
 template<typename U>
-inline Matrix<T, M, N>::Matrix(const Matrix<U, M, N> &m)
+inline Matrix<T, M, N>::Matrix(const Matrix<U, M, N> &other)
 {
-	std::copy(m.data, m.data+M*N, data);
+	for(unsigned i=0; i<M; ++i)
+		for(unsigned j=0; j<N; ++j)
+			element(i, j) = other(i, j);
 }
 
 template<typename T, unsigned M, unsigned N>
@@ -66,6 +68,7 @@ inline Matrix<T, M, N> Matrix<T, M, N>::from_columns(const Vector<T, M> *v)
 	for(unsigned i=0; i<M; ++i)
 		for(unsigned j=0; j<N; ++j)
 			m(i, j) = v[j][i];
+	return m;
 }
 
 template<typename T, unsigned M, unsigned N>
@@ -75,6 +78,7 @@ inline Matrix<T, M, N> Matrix<T, M, N>::from_rows(const Vector<T, N> *v)
 	for(unsigned i=0; i<M; ++i)
 		for(unsigned j=0; j<N; ++j)
 			m(i, j) = v[i][j];
+	return m;
 }
 
 template<typename T, unsigned M, unsigned N>
@@ -187,8 +191,9 @@ inline bool operator==(const Matrix<T, M, N> &a, const Matrix<T, M, N> &b)
 template<typename T, unsigned M, unsigned N>
 inline Matrix<T, M, N> &Matrix<T, M, N>::exchange_rows(unsigned i, unsigned j)
 {
+	using std::swap;
 	for(unsigned k=0; k<N; ++k)
-		std::swap(element(i, k), element(j, k));
+		swap(element(i, k), element(j, k));
 	return *this;
 }