Add tensor features

include/Geometry/tensor.h

@@ -107,6 +107,15 @@ class Tensor
 		 */
 		void identity() ;
 
+		/**
+		 * \brief Modifier: set constant values
+		 *
+		 * Sets all values to r
+		 *
+		 * \param r the constant value
+		 */
+		void setConst(const REAL& r) ;
+
 		/**
 		 * \brief Modifier: copy Tensor
 		 *

include/Geometry/tensor.hpp

@@ -39,6 +39,9 @@ Tensor<SIZE, REAL>::Tensor(const Tensor& T):
 m_order(T.m_order)
 {
 	m_data = new REAL[T.nbElem()] ;
+
+	for (unsigned int i = 0 ; i < T.nbElem() ; ++i)
+		m_data[i] = T[i] ;
 }
 
 template <unsigned int SIZE, typename REAL>
@@ -65,24 +68,37 @@ void Tensor<SIZE, REAL>::identity()
 
 template <unsigned int SIZE, typename REAL>
 void
-Tensor<SIZE, REAL>::operator=(const Tensor& T)
+Tensor<SIZE, REAL>::zero()
 {
-	m_order = T.m_order ;
-	m_data = new REAL[T.nbElem()] ;
-	for (unsigned int i = 0 ; i < T.nbElem() ; ++i)
-		m_data[i] = T[i] ;
+	for (unsigned int i = 0 ; i < (unsigned int)pow(SIZE,m_order) ; ++i)
+	{
+		m_data[i] = 0 ;
+	}
 }
 
 template <unsigned int SIZE, typename REAL>
 void
-Tensor<SIZE, REAL>::zero()
+Tensor<SIZE, REAL>::setConst(const REAL& r)
 {
-	for (unsigned int i = 0 ; i < (unsigned int)pow(SIZE,m_order) ; ++i)
+	for (unsigned int i = 0 ; i < nbElem() ; ++i)
 	{
-		m_data[i] = 0 ;
+		m_data[i] = r ;
 	}
 }
 
+template <unsigned int SIZE, typename REAL>
+void
+Tensor<SIZE, REAL>::operator=(const Tensor& T)
+{
+	m_order = T.m_order ;
+
+	delete(m_data) ;
+	m_data = new REAL[T.nbElem()] ;
+
+	for (unsigned int i = 0 ; i < T.nbElem() ; ++i)
+		m_data[i] = T[i] ;
+}
+
 template <unsigned int SIZE, typename REAL>
 const REAL&
 Tensor<SIZE, REAL>::operator()(std::vector<unsigned int> p) const
@@ -153,13 +169,13 @@ template <unsigned int SIZE, typename REAL>
 bool
 Tensor<SIZE, REAL>::incremIndex(std::vector<unsigned int>& p)
 {
-	unsigned int i = 0 ;
-	while (i < p.size())
+	int i = p.size() - 1 ;
+	while (i >= 0)
 	{
 		p[i] = (p[i] + 1) % SIZE ;
 		if (p[i] != 0) // if no overflow
 			return true ;
-		++i ;
+		--i ;
 	}
 	return false ;
 }