Add MyGlobalNonlinearity class

dune/tectonic/myglobalnonlinearity.hh

+/* -*- mode:c++; mode:semantic -*- */
+
+#ifndef MY_GLOBAL_NONLINEARITY_HH
+#define MY_GLOBAL_NONLINEARITY_HH
+
+//#include <dune/common/bitsetvector.hh>
+#include <dune/common/fvector.hh>
+#include <dune/tectonic/mynonlinearity.hh>
+
+namespace Dune {
+template <int dim, class OuterFunctionType> class MyGlobalNonlinearity {
+public:
+  MyGlobalNonlinearity(
+      std::vector<double> const &coefficientOfFriction,
+      std::vector<double> const &normalStress,
+      std::vector<Dune::FieldVector<double, 1>> const &nodalIntegrals)
+      : coefficientOfFriction(coefficientOfFriction),
+        normalStress(normalStress),
+        nodalIntegrals(nodalIntegrals) {}
+
+  void restriction(int i, OuterFunctionType &f) {
+    double coefficient = normalStress[i] * nodalIntegrals[i];
+    // FIXME: Assume Gamma = id and h_{n+1} = 1 for now;
+    // We then only have to evaluate (1 + F_xi)(|x|)
+    coefficient *= 1 + coefficientOfFriction[i];
+    f = OuterFunctionType(coefficient);
+  }
+
+private:
+  // TODO: If we're clever, we only store one vector with the precomputed
+  // results
+  std::vector<double> coefficientOfFriction;
+  std::vector<double> normalStress;
+  std::vector<Dune::FieldVector<double, 1>> nodalIntegrals;
+};
+}
+#endif