add vcglib

vcglib/wrap/math/sparse_matrix.h

@@ -0,0 +1,48 @@
+#include <vector>
+#include <map>
+#include <algorithm>
+
+
+///this class define the interface to use sparse matrix
+///you must extend this class and implement the code of each function in order
+///to the system solver you're using.
+///For details on implementation see system_interface_LDL.h as example
+template <class ScalarType>
+class SparseMatrix{
+
+public:
+
+	std::vector<int> _Ap;
+	std::vector<int> _Ai;
+	std::vector<double> _Ax;
+
+	typedef typename std::pair<int,int> IndexType;
+
+	int _dimension;
+
+public:
+
+///initilaization of the system
+virtual void Initalize(int dimension)
+{_dimension=dimension;}
+
+///create a sparse matrix given a set of entries as vector
+///of pair of int
+virtual void CreateSparse(std::vector<IndexType> Entries)
+{}
+
+///return the value of the matrix
+virtual ScalarType &A(int row,int col)
+{return (_Ax[0]);}
+
+///return true if the represention of sparse matriz is symmetric
+virtual bool IsSymmetric()
+{return false;}
+
+virtual void Zero()
+{}
+
+///return the dimension of the matrix
+virtual int Size(){return _dimension;}
+
+};