From f34a10622ea1ea3aba5d1e2e5c866a1dd9a1a51a Mon Sep 17 00:00:00 2001
From: Elias Pipping <elias.pipping@fu-berlin.de>
Date: Thu, 6 Jun 2013 18:14:52 +0200
Subject: [PATCH] udd -> a, ud -> v

---
 src/one-body-sample.cc | 30 +++++++++---------
 src/timestepping.cc    | 70 +++++++++++++++++++++---------------------
 src/timestepping.hh    | 24 +++++++--------
 3 files changed, 62 insertions(+), 62 deletions(-)

diff --git a/src/one-body-sample.cc b/src/one-body-sample.cc
index e3eb4ee5..edcc2bcb 100644
--- a/src/one-body-sample.cc
+++ b/src/one-body-sample.cc
@@ -89,23 +89,23 @@ Dune::shared_ptr<TimeSteppingScheme<VectorType, MatrixType, FunctionType, dims>>
 initTimeStepper(Config::scheme scheme, FunctionType const &dirichletFunction,
                 Dune::BitSetVector<dims> const &ignoreNodes,
                 MatrixType const &massMatrix, MatrixType const &stiffnessMatrix,
-                VectorType const &u_initial, VectorType const &ud_initial,
-                VectorType const &udd_initial) {
+                VectorType const &u_initial, VectorType const &v_initial,
+                VectorType const &a_initial) {
   switch (scheme) {
     case Config::ImplicitEuler:
       return Dune::make_shared<
           ImplicitEuler<VectorType, MatrixType, FunctionType, dims>>(
-          stiffnessMatrix, u_initial, ud_initial, ignoreNodes,
+          stiffnessMatrix, u_initial, v_initial, ignoreNodes,
           dirichletFunction);
     case Config::Newmark:
       return Dune::make_shared<
           Newmark<VectorType, MatrixType, FunctionType, dims>>(
-          stiffnessMatrix, massMatrix, u_initial, ud_initial, udd_initial,
+          stiffnessMatrix, massMatrix, u_initial, v_initial, a_initial,
           ignoreNodes, dirichletFunction);
     case Config::EulerPair:
       return Dune::make_shared<
           EulerPair<VectorType, MatrixType, FunctionType, dims>>(
-          stiffnessMatrix, massMatrix, u_initial, ud_initial, ignoreNodes,
+          stiffnessMatrix, massMatrix, u_initial, v_initial, ignoreNodes,
           dirichletFunction);
     default:
       assert(false);
@@ -328,11 +328,11 @@ int main(int argc, char *argv[]) {
     // {{{ Initial conditions
     VectorType u_initial(finestSize);
     u_initial = 0.0;
-    VectorType ud_initial(finestSize);
-    ud_initial = 0.0;
+    VectorType v_initial(finestSize);
+    v_initial = 0.0;
     // FIXME: This only happens to be correct
-    VectorType udd_initial(finestSize);
-    udd_initial = 0.0;
+    VectorType a_initial(finestSize);
+    a_initial = 0.0;
 
     SingletonVectorType alpha_initial(finestSize);
     alpha_initial =
@@ -365,7 +365,7 @@ int main(int argc, char *argv[]) {
     auto timeSteppingScheme =
         initTimeStepper(parset.get<Config::scheme>("timeSteppingScheme"),
                         dirichletFunction, ignoreNodes, massMatrix,
-                        stiffnessMatrix, u_initial, ud_initial, udd_initial);
+                        stiffnessMatrix, u_initial, v_initial, a_initial);
     auto stateUpdater = initStateUpdater<SingletonVectorType, VectorType>(
         parset.get<Config::state_model>("boundary.friction.state_model"),
         alpha_initial, frictionalNodes, frictionData);
@@ -378,7 +378,7 @@ int main(int argc, char *argv[]) {
       _ell += gravityFunctional;
     };
 
-    VectorType ud = ud_initial;
+    VectorType v = v_initial;
     SingletonVectorType alpha = alpha_initial;
     auto const state_fpi_max =
         parset.get<size_t>("solver.tnnmg.fixed_point_iterations");
@@ -437,7 +437,7 @@ int main(int argc, char *argv[]) {
           parset.get<double>("solver.minimal_correction_reduction");
 
       for (size_t state_fpi = 1; state_fpi <= state_fpi_max; ++state_fpi) {
-        stateUpdater->solve(ud);
+        stateUpdater->solve(v);
         {
           SingletonVectorType computed_state;
           stateUpdater->extractState(computed_state);
@@ -457,7 +457,7 @@ int main(int argc, char *argv[]) {
         solveVelocityProblem(problem_iterate, alpha);
         timeSteppingScheme->postProcess(problem_iterate);
         timeSteppingScheme->extractDisplacement(u);
-        timeSteppingScheme->extractVelocity(ud);
+        timeSteppingScheme->extractVelocity(v);
 
         iterationWriter << iterationCounter << " ";
         if (parset.get<bool>("printProgress")) {
@@ -486,8 +486,8 @@ int main(int argc, char *argv[]) {
         if (frictionalNodes[i][0]) {
           stateWriter << alpha[i][0] << " ";
           displacementWriter << u[i][0] << " ";
-          velocityWriter << ud[i][0] << " ";
-          coefficientWriter << computeCOF(frictionData, ud[i].two_norm(),
+          velocityWriter << v[i][0] << " ";
+          coefficientWriter << computeCOF(frictionData, v[i].two_norm(),
                                           alpha[i]) << " ";
         }
 
diff --git a/src/timestepping.cc b/src/timestepping.cc
index 695bccdb..8d89ae76 100644
--- a/src/timestepping.cc
+++ b/src/timestepping.cc
@@ -9,18 +9,18 @@
 template <class VectorType, class MatrixType, class FunctionType, int dim>
 ImplicitEuler<VectorType, MatrixType, FunctionType, dim>::ImplicitEuler(
     MatrixType const &_A, VectorType const &_u_initial,
-    VectorType const &_ud_initial,
+    VectorType const &_v_initial,
     Dune::BitSetVector<dim> const &_dirichletNodes,
     FunctionType const &_dirichletFunction)
     : A(_A),
       u(_u_initial),
-      ud(_ud_initial),
+      v(_v_initial),
       dirichletNodes(_dirichletNodes),
       dirichletFunction(_dirichletFunction) {}
 
 template <class VectorType, class MatrixType, class FunctionType, int dim>
 void ImplicitEuler<VectorType, MatrixType, FunctionType, dim>::nextTimeStep() {
-  ud_old = ud;
+  v_old = v;
   u_old = u;
 }
 
@@ -39,8 +39,8 @@ void ImplicitEuler<VectorType, MatrixType, FunctionType, dim>::setup(
   problem_AB = A;
   problem_AB *= tau;
 
-  // ud_old makes a good initial iterate; we could use anything, though
-  problem_iterate = ud_old;
+  // v_old makes a good initial iterate; we could use anything, though
+  problem_iterate = v_old;
 
   for (size_t i = 0; i < dirichletNodes.size(); ++i)
     switch (dirichletNodes[i].count()) {
@@ -70,10 +70,10 @@ void ImplicitEuler<VectorType, MatrixType, FunctionType, dim>::postProcess(
     VectorType const &problem_iterate) {
   postProcessCalled = true;
 
-  ud = problem_iterate;
+  v = problem_iterate;
 
   u = u_old;
-  Arithmetic::addProduct(u, tau, ud);
+  Arithmetic::addProduct(u, tau, v);
 }
 
 template <class VectorType, class MatrixType, class FunctionType, int dim>
@@ -91,7 +91,7 @@ void ImplicitEuler<VectorType, MatrixType, FunctionType, dim>::extractVelocity(
   if (!postProcessCalled)
     DUNE_THROW(Dune::Exception, "It seems you forgot to call postProcess!");
 
-  velocity = ud;
+  velocity = v;
 }
 
 template <class VectorType, class MatrixType, class FunctionType, int dim>
@@ -102,21 +102,21 @@ ImplicitEuler<VectorType, MatrixType, FunctionType, dim>::clone() {
 template <class VectorType, class MatrixType, class FunctionType, int dim>
 Newmark<VectorType, MatrixType, FunctionType, dim>::Newmark(
     MatrixType const &_A, MatrixType const &_B, VectorType const &_u_initial,
-    VectorType const &_ud_initial, VectorType const &_udd_initial,
+    VectorType const &_v_initial, VectorType const &_a_initial,
     Dune::BitSetVector<dim> const &_dirichletNodes,
     FunctionType const &_dirichletFunction)
     : A(_A),
       B(_B),
       u(_u_initial),
-      ud(_ud_initial),
-      udd(_udd_initial),
+      v(_v_initial),
+      a(_a_initial),
       dirichletNodes(_dirichletNodes),
       dirichletFunction(_dirichletFunction) {}
 
 template <class VectorType, class MatrixType, class FunctionType, int dim>
 void Newmark<VectorType, MatrixType, FunctionType, dim>::nextTimeStep() {
-  udd_old = udd;
-  ud_old = ud;
+  a_old = a;
+  v_old = v;
   u_old = u;
 }
 
@@ -129,10 +129,10 @@ void Newmark<VectorType, MatrixType, FunctionType, dim>::setup(
   tau = _tau;
 
   problem_rhs = ell;
-  Arithmetic::addProduct(problem_rhs, 2.0 / tau, B, ud_old);
-  Arithmetic::addProduct(problem_rhs, B, udd_old);
+  Arithmetic::addProduct(problem_rhs, 2.0 / tau, B, v_old);
+  Arithmetic::addProduct(problem_rhs, B, a_old);
   Arithmetic::addProduct(problem_rhs, -1.0, A, u_old);
-  Arithmetic::addProduct(problem_rhs, -tau / 2.0, A, ud_old);
+  Arithmetic::addProduct(problem_rhs, -tau / 2.0, A, v_old);
 
   // For fixed tau, we'd only really have to do this once
   Dune::MatrixIndexSet indices(A.N(), A.M());
@@ -143,8 +143,8 @@ void Newmark<VectorType, MatrixType, FunctionType, dim>::setup(
   Arithmetic::addProduct(problem_AB, tau / 2.0, A);
   Arithmetic::addProduct(problem_AB, 2.0 / tau, B);
 
-  // ud_old makes a good initial iterate; we could use anything, though
-  problem_iterate = ud_old;
+  // v_old makes a good initial iterate; we could use anything, though
+  problem_iterate = v_old;
 
   for (size_t i = 0; i < dirichletNodes.size(); ++i)
     switch (dirichletNodes[i].count()) {
@@ -174,16 +174,16 @@ void Newmark<VectorType, MatrixType, FunctionType, dim>::postProcess(
     VectorType const &problem_iterate) {
   postProcessCalled = true;
 
-  ud = problem_iterate;
+  v = problem_iterate;
 
   u = u_old;
-  Arithmetic::addProduct(u, tau / 2.0, ud);
-  Arithmetic::addProduct(u, tau / 2.0, ud_old);
+  Arithmetic::addProduct(u, tau / 2.0, v);
+  Arithmetic::addProduct(u, tau / 2.0, v_old);
 
-  udd = 0;
-  Arithmetic::addProduct(udd, 2.0 / tau, ud);
-  Arithmetic::addProduct(udd, -2.0 / tau, ud_old);
-  Arithmetic::addProduct(udd, -1.0, udd_old);
+  a = 0;
+  Arithmetic::addProduct(a, 2.0 / tau, v);
+  Arithmetic::addProduct(a, -2.0 / tau, v_old);
+  Arithmetic::addProduct(a, -1.0, a_old);
 }
 
 template <class VectorType, class MatrixType, class FunctionType, int dim>
@@ -201,7 +201,7 @@ void Newmark<VectorType, MatrixType, FunctionType, dim>::extractVelocity(
   if (!postProcessCalled)
     DUNE_THROW(Dune::Exception, "It seems you forgot to call postProcess!");
 
-  velocity = ud;
+  velocity = v;
 }
 
 template <class VectorType, class MatrixType, class FunctionType, int dim>
@@ -212,19 +212,19 @@ Newmark<VectorType, MatrixType, FunctionType, dim>::clone() {
 template <class VectorType, class MatrixType, class FunctionType, int dim>
 EulerPair<VectorType, MatrixType, FunctionType, dim>::EulerPair(
     MatrixType const &_A, MatrixType const &_B, VectorType const &_u_initial,
-    VectorType const &_ud_initial,
+    VectorType const &_v_initial,
     Dune::BitSetVector<dim> const &_dirichletNodes,
     FunctionType const &_dirichletFunction)
     : A(_A),
       B(_B),
       u(_u_initial),
-      ud(_ud_initial),
+      v(_v_initial),
       dirichletNodes(_dirichletNodes),
       dirichletFunction(_dirichletFunction) {}
 
 template <class VectorType, class MatrixType, class FunctionType, int dim>
 void EulerPair<VectorType, MatrixType, FunctionType, dim>::nextTimeStep() {
-  ud_old = ud;
+  v_old = v;
   u_old = u;
 }
 
@@ -237,7 +237,7 @@ void EulerPair<VectorType, MatrixType, FunctionType, dim>::setup(
   tau = _tau;
 
   problem_rhs = ell;
-  Arithmetic::addProduct(problem_rhs, 1.0 / tau, B, ud_old);
+  Arithmetic::addProduct(problem_rhs, 1.0 / tau, B, v_old);
   Arithmetic::addProduct(problem_rhs, -1.0, A, u_old);
 
   // For fixed tau, we'd only really have to do this once
@@ -249,8 +249,8 @@ void EulerPair<VectorType, MatrixType, FunctionType, dim>::setup(
   Arithmetic::addProduct(problem_AB, tau, A);
   Arithmetic::addProduct(problem_AB, 1.0 / tau, B);
 
-  // ud_old makes a good initial iterate; we could use anything, though
-  problem_iterate = ud_old;
+  // v_old makes a good initial iterate; we could use anything, though
+  problem_iterate = v_old;
 
   for (size_t i = 0; i < dirichletNodes.size(); ++i)
     switch (dirichletNodes[i].count()) {
@@ -280,10 +280,10 @@ void EulerPair<VectorType, MatrixType, FunctionType, dim>::postProcess(
     VectorType const &problem_iterate) {
   postProcessCalled = true;
 
-  ud = problem_iterate;
+  v = problem_iterate;
 
   u = u_old;
-  Arithmetic::addProduct(u, tau, ud);
+  Arithmetic::addProduct(u, tau, v);
 }
 
 template <class VectorType, class MatrixType, class FunctionType, int dim>
@@ -301,7 +301,7 @@ void EulerPair<VectorType, MatrixType, FunctionType, dim>::extractVelocity(
   if (!postProcessCalled)
     DUNE_THROW(Dune::Exception, "It seems you forgot to call postProcess!");
 
-  velocity = ud;
+  velocity = v;
 }
 
 template <class VectorType, class MatrixType, class FunctionType, int dim>
diff --git a/src/timestepping.hh b/src/timestepping.hh
index 6484dceb..55ed3450 100644
--- a/src/timestepping.hh
+++ b/src/timestepping.hh
@@ -24,7 +24,7 @@ class ImplicitEuler
     : public TimeSteppingScheme<VectorType, MatrixType, FunctionType, dim> {
 public:
   ImplicitEuler(MatrixType const &_A, VectorType const &_u_initial,
-                VectorType const &_ud_initial,
+                VectorType const &_v_initial,
                 Dune::BitSetVector<dim> const &_dirichletNodes,
                 FunctionType const &_dirichletFunction);
 
@@ -41,12 +41,12 @@ class ImplicitEuler
 private:
   MatrixType const &A;
   VectorType u;
-  VectorType ud;
+  VectorType v;
   Dune::BitSetVector<dim> const &dirichletNodes;
   FunctionType const &dirichletFunction;
 
   VectorType u_old;
-  VectorType ud_old;
+  VectorType v_old;
 
   double tau;
 
@@ -58,8 +58,8 @@ class Newmark
     : public TimeSteppingScheme<VectorType, MatrixType, FunctionType, dim> {
 public:
   Newmark(MatrixType const &_A, MatrixType const &_B,
-          VectorType const &_u_initial, VectorType const &_ud_initial,
-          VectorType const &_udd_initial,
+          VectorType const &_u_initial, VectorType const &_v_initial,
+          VectorType const &_a_initial,
           Dune::BitSetVector<dim> const &_dirichletNodes,
           FunctionType const &_dirichletFunction);
 
@@ -77,14 +77,14 @@ class Newmark
   MatrixType const &A;
   MatrixType const &B;
   VectorType u;
-  VectorType ud;
-  VectorType udd;
+  VectorType v;
+  VectorType a;
   Dune::BitSetVector<dim> const &dirichletNodes;
   FunctionType const &dirichletFunction;
 
   VectorType u_old;
-  VectorType ud_old;
-  VectorType udd_old;
+  VectorType v_old;
+  VectorType a_old;
 
   double tau;
 
@@ -96,7 +96,7 @@ class EulerPair
     : public TimeSteppingScheme<VectorType, MatrixType, FunctionType, dim> {
 public:
   EulerPair(MatrixType const &_A, MatrixType const &_B,
-            VectorType const &_u_initial, VectorType const &_ud_initial,
+            VectorType const &_u_initial, VectorType const &_v_initial,
             Dune::BitSetVector<dim> const &_dirichletNodes,
             FunctionType const &_dirichletFunction);
 
@@ -114,12 +114,12 @@ class EulerPair
   MatrixType const &A;
   MatrixType const &B;
   VectorType u;
-  VectorType ud;
+  VectorType v;
   Dune::BitSetVector<dim> const &dirichletNodes;
   FunctionType const &dirichletFunction;
 
   VectorType u_old;
-  VectorType ud_old;
+  VectorType v_old;
 
   double tau;
 
-- 
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