Add method for completing a Tensor that is partially filled and supposed

to be symmetric.

include/Geometry/tensor.h

@@ -29,6 +29,9 @@
  * \file tensor.h
  */
 
+#define CONST_VAL -5212368.54127 // random value
+
+
 namespace CGoGN
 {
 
@@ -192,6 +195,15 @@ class Tensor
 		 */
 		static bool incremIndex(std::vector<unsigned int>& p) ;
 
+		/*!
+		 * \brief method to complete a symmetric tensor that was
+		 * only filled in its first half (defined by an index that
+		 * is order ascendantly)
+		 *
+		 * \param T the tensor to fill
+		 */
+		void completeSymmetricTensor() ;
+
 		/**********************************************/
 		/*             STREAM OPERATORS               */
 		/**********************************************/

include/Geometry/tensor.hpp

@@ -134,6 +134,21 @@ Tensor<SIZE, REAL>::getIndex(std::vector<unsigned int> p) const
 	return res ;
 }
 
+
+template <unsigned int SIZE, typename REAL>
+void
+Tensor<SIZE, REAL>::completeSymmetricTensor()
+{
+	std::vector<unsigned int> p ;
+	p.resize(order(), 0) ;
+	do
+	{
+		std::vector<unsigned int> sorted_p = p ;
+		std::sort(sorted_p.begin(), sorted_p.begin() + (*this).order()) ;
+		(*this)(p) = (*this)(sorted_p) ;
+	} while (incremIndex(p)) ;
+}
+
 template <unsigned int SIZE, typename REAL>
 const unsigned int&
 Tensor<SIZE, REAL>::order() const