correction des produits matrice/vecteur et vecteur/matrice

include/Geometry/matrix.h

@@ -161,7 +161,11 @@ class Matrix
 
 // Vector / Matrix multiplication
 template <unsigned int M, unsigned int N, typename T>
-Vector<M,T> operator*(const Vector<N,T>& v, const Matrix<M,N,T>& m) ;
+Vector<N,T> operator*(const Vector<M,T>& v, const Matrix<M,N,T>& m) ;
+
+// Matrix / Vector multiplication
+template <unsigned int M, unsigned int N, typename T>
+Vector<M,T> operator*(const Matrix<M,N,T>& m,const Vector<N,T>& v) ;
 
 // Scalar / Matrix multiplication
 template <unsigned int M, unsigned int N, typename T>

include/Geometry/matrix.hpp

@@ -431,13 +431,25 @@ std::istream& operator>>(std::istream& in, Matrix<M,N,T>& m)
 template <unsigned int M, unsigned int N, typename T>
 Vector<N,T> operator*(const Vector<M,T>& v, const Matrix<M,N,T>& m)
 {
-	Vector<N,T> res ;
+	Vector<N,T> res (0);
 	for(unsigned int i = 0; i < M; ++i)
 		for(unsigned int j = 0; j < N; ++j)
 			res[j] += m(i,j) * v[i] ;
 	return res ;
 }
 
+// Matrix / Vector multiplication
+template <unsigned int M, unsigned int N, typename T>
+Vector<M,T> operator*(const Matrix<M,N,T>& m,const Vector<N,T>& v) {
+	Vector<M,T> res (0);
+	for(unsigned int i = 0; i < M; ++i)
+		for(unsigned int j = 0; j < N; ++j)
+			res[i] += m(i,j) * v[j] ;
+	return res ;
+}
+
+
+
 // Scalar / Matrix multiplication
 template <unsigned int M, unsigned int N, typename T>
 Matrix<M,N,T> operator*(T s, const Matrix<M,N,T>& m)