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rGOOSEFEM/include/GooseFEM/MatrixPartitioned.hpp
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MatrixPartitioned.hpp
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/*
(c - GPLv3) T.W.J. de Geus (Tom) | tom@geus.me | www.geus.me | github.com/tdegeus/GooseFEM
*/
#ifndef GOOSEFEM_MATRIXPARTITIONED_HPP
#define GOOSEFEM_MATRIXPARTITIONED_HPP
#include "MatrixPartitioned.h"
#include "Mesh.h"
namespace GooseFEM {
inline MatrixPartitioned::MatrixPartitioned(
const xt::xtensor<size_t, 2>& conn,
const xt::xtensor<size_t, 2>& dofs,
const xt::xtensor<size_t, 1>& iip)
: m_conn(conn), m_dofs(dofs), m_iip(iip)
{
m_nelem = m_conn.shape(0);
m_nne = m_conn.shape(1);
m_nnode = m_dofs.shape(0);
m_ndim = m_dofs.shape(1);
m_iiu = xt::setdiff1d(dofs, iip);
m_ndof = xt::amax(m_dofs)() + 1;
m_nnp = m_iip.size();
m_nnu = m_iiu.size();
m_part = Mesh::Reorder({m_iiu, m_iip}).get(m_dofs);
m_Tuu.reserve(m_nelem * m_nne * m_ndim * m_nne * m_ndim);
m_Tup.reserve(m_nelem * m_nne * m_ndim * m_nne * m_ndim);
m_Tpu.reserve(m_nelem * m_nne * m_ndim * m_nne * m_ndim);
m_Tpp.reserve(m_nelem * m_nne * m_ndim * m_nne * m_ndim);
m_Auu.resize(m_nnu, m_nnu);
m_Aup.resize(m_nnu, m_nnp);
m_Apu.resize(m_nnp, m_nnu);
m_App.resize(m_nnp, m_nnp);
GOOSEFEM_ASSERT(xt::amax(m_conn)() + 1 <= m_nnode);
GOOSEFEM_ASSERT(xt::amax(m_iip)() <= xt::amax(m_dofs)());
GOOSEFEM_ASSERT(m_ndof <= m_nnode * m_ndim);
}
inline size_t MatrixPartitioned::nelem() const
{
return m_nelem;
}
inline size_t MatrixPartitioned::nne() const
{
return m_nne;
}
inline size_t MatrixPartitioned::nnode() const
{
return m_nnode;
}
inline size_t MatrixPartitioned::ndim() const
{
return m_ndim;
}
inline size_t MatrixPartitioned::ndof() const
{
return m_ndof;
}
inline size_t MatrixPartitioned::nnu() const
{
return m_nnu;
}
inline size_t MatrixPartitioned::nnp() const
{
return m_nnp;
}
inline xt::xtensor<size_t, 2> MatrixPartitioned::dofs() const
{
return m_dofs;
}
inline xt::xtensor<size_t, 1> MatrixPartitioned::iiu() const
{
return m_iiu;
}
inline xt::xtensor<size_t, 1> MatrixPartitioned::iip() const
{
return m_iip;
}
inline void MatrixPartitioned::assemble(const xt::xtensor<double, 3>& elemmat)
{
GOOSEFEM_ASSERT(xt::has_shape(elemmat, {m_nelem, m_nne * m_ndim, m_nne * m_ndim}));
m_Tuu.clear();
m_Tup.clear();
m_Tpu.clear();
m_Tpp.clear();
for (size_t e = 0; e < m_nelem; ++e) {
for (size_t m = 0; m < m_nne; ++m) {
for (size_t i = 0; i < m_ndim; ++i) {
size_t di = m_part(m_conn(e, m), i);
for (size_t n = 0; n < m_nne; ++n) {
for (size_t j = 0; j < m_ndim; ++j) {
size_t dj = m_part(m_conn(e, n), j);
if (di < m_nnu && dj < m_nnu) {
m_Tuu.push_back(Eigen::Triplet<double>(
di, dj, elemmat(e, m * m_ndim + i, n * m_ndim + j)));
}
else if (di < m_nnu) {
m_Tup.push_back(Eigen::Triplet<double>(
di, dj - m_nnu, elemmat(e, m * m_ndim + i, n * m_ndim + j)));
}
else if (dj < m_nnu) {
m_Tpu.push_back(Eigen::Triplet<double>(
di - m_nnu, dj, elemmat(e, m * m_ndim + i, n * m_ndim + j)));
}
else {
m_Tpp.push_back(Eigen::Triplet<double>(
di - m_nnu,
dj - m_nnu,
elemmat(e, m * m_ndim + i, n * m_ndim + j)));
}
}
}
}
}
}
m_Auu.setFromTriplets(m_Tuu.begin(), m_Tuu.end());
m_Aup.setFromTriplets(m_Tup.begin(), m_Tup.end());
m_Apu.setFromTriplets(m_Tpu.begin(), m_Tpu.end());
m_App.setFromTriplets(m_Tpp.begin(), m_Tpp.end());
m_changed = true;
}
inline void
MatrixPartitioned::reaction(const xt::xtensor<double, 2>& x, xt::xtensor<double, 2>& b) const
{
GOOSEFEM_ASSERT(xt::has_shape(x, {m_nnode, m_ndim}));
GOOSEFEM_ASSERT(xt::has_shape(b, {m_nnode, m_ndim}));
Eigen::VectorXd X_u = this->AsDofs_u(x);
Eigen::VectorXd X_p = this->AsDofs_p(x);
Eigen::VectorXd B_p = m_Apu * X_u + m_App * X_p;
#pragma omp parallel for
for (size_t m = 0; m < m_nnode; ++m) {
for (size_t i = 0; i < m_ndim; ++i) {
if (m_part(m, i) >= m_nnu) {
b(m, i) = B_p(m_part(m, i) - m_nnu);
}
}
}
}
inline void
MatrixPartitioned::reaction(const xt::xtensor<double, 1>& x, xt::xtensor<double, 1>& b) const
{
GOOSEFEM_ASSERT(x.size() == m_ndof);
GOOSEFEM_ASSERT(b.size() == m_ndof);
Eigen::VectorXd X_u = this->AsDofs_u(x);
Eigen::VectorXd X_p = this->AsDofs_p(x);
Eigen::VectorXd B_p = m_Apu * X_u + m_App * X_p;
#pragma omp parallel for
for (size_t d = 0; d < m_nnp; ++d) {
b(m_iip(d)) = B_p(d);
}
}
inline void MatrixPartitioned::reaction_p(
const xt::xtensor<double, 1>& x_u,
const xt::xtensor<double, 1>& x_p,
xt::xtensor<double, 1>& b_p) const
{
GOOSEFEM_ASSERT(x_u.size() == m_nnu);
GOOSEFEM_ASSERT(x_p.size() == m_nnp);
GOOSEFEM_ASSERT(b_p.size() == m_nnp);
Eigen::Map<Eigen::VectorXd>(b_p.data(), b_p.size()).noalias() =
m_Apu * Eigen::Map<const Eigen::VectorXd>(x_u.data(), x_u.size()) +
m_App * Eigen::Map<const Eigen::VectorXd>(x_p.data(), x_p.size());
}
inline xt::xtensor<double, 2>
MatrixPartitioned::Reaction(const xt::xtensor<double, 2>& x, const xt::xtensor<double, 2>& b) const
{
xt::xtensor<double, 2> ret = b;
this->reaction(x, ret);
return ret;
}
inline xt::xtensor<double, 1>
MatrixPartitioned::Reaction(const xt::xtensor<double, 1>& x, const xt::xtensor<double, 1>& b) const
{
xt::xtensor<double, 1> ret = b;
this->reaction(x, ret);
return ret;
}
inline xt::xtensor<double, 1> MatrixPartitioned::Reaction_p(
const xt::xtensor<double, 1>& x_u, const xt::xtensor<double, 1>& x_p) const
{
xt::xtensor<double, 1> b_p = xt::empty<double>({m_nnp});
this->reaction_p(x_u, x_p, b_p);
return b_p;
}
inline Eigen::VectorXd MatrixPartitioned::AsDofs_u(const xt::xtensor<double, 1>& dofval) const
{
GOOSEFEM_ASSERT(dofval.size() == m_ndof);
Eigen::VectorXd dofval_u(m_nnu, 1);
#pragma omp parallel for
for (size_t d = 0; d < m_nnu; ++d) {
dofval_u(d) = dofval(m_iiu(d));
}
return dofval_u;
}
inline Eigen::VectorXd MatrixPartitioned::AsDofs_u(const xt::xtensor<double, 2>& nodevec) const
{
GOOSEFEM_ASSERT(xt::has_shape(nodevec, {m_nnode, m_ndim}));
Eigen::VectorXd dofval_u = Eigen::VectorXd::Zero(m_nnu, 1);
#pragma omp parallel for
for (size_t m = 0; m < m_nnode; ++m) {
for (size_t i = 0; i < m_ndim; ++i) {
if (m_part(m, i) < m_nnu) {
dofval_u(m_part(m, i)) = nodevec(m, i);
}
}
}
return dofval_u;
}
inline Eigen::VectorXd MatrixPartitioned::AsDofs_p(const xt::xtensor<double, 1>& dofval) const
{
GOOSEFEM_ASSERT(dofval.size() == m_ndof);
Eigen::VectorXd dofval_p(m_nnp, 1);
#pragma omp parallel for
for (size_t d = 0; d < m_nnp; ++d) {
dofval_p(d) = dofval(m_iip(d));
}
return dofval_p;
}
inline Eigen::VectorXd MatrixPartitioned::AsDofs_p(const xt::xtensor<double, 2>& nodevec) const
{
GOOSEFEM_ASSERT(xt::has_shape(nodevec, {m_nnode, m_ndim}));
Eigen::VectorXd dofval_p = Eigen::VectorXd::Zero(m_nnp, 1);
#pragma omp parallel for
for (size_t m = 0; m < m_nnode; ++m) {
for (size_t i = 0; i < m_ndim; ++i) {
if (m_part(m, i) >= m_nnu) {
dofval_p(m_part(m, i) - m_nnu) = nodevec(m, i);
}
}
}
return dofval_p;
}
template <class Solver>
inline void MatrixPartitionedSolver<Solver>::factorize(MatrixPartitioned& matrix)
{
if (!matrix.m_changed && !m_factor) {
return;
}
m_solver.compute(matrix.m_Auu);
m_factor = false;
matrix.m_changed = false;
}
template <class Solver>
inline void MatrixPartitionedSolver<Solver>::solve(
MatrixPartitioned& matrix, const xt::xtensor<double, 2>& b, xt::xtensor<double, 2>& x)
{
GOOSEFEM_ASSERT(xt::has_shape(b, {matrix.m_nnode, matrix.m_ndim}));
GOOSEFEM_ASSERT(xt::has_shape(x, {matrix.m_nnode, matrix.m_ndim}));
this->factorize(matrix);
Eigen::VectorXd B_u = matrix.AsDofs_u(b);
Eigen::VectorXd X_p = matrix.AsDofs_p(x);
Eigen::VectorXd X_u = m_solver.solve(Eigen::VectorXd(B_u - matrix.m_Aup * X_p));
#pragma omp parallel for
for (size_t m = 0; m < matrix.m_nnode; ++m) {
for (size_t i = 0; i < matrix.m_ndim; ++i) {
if (matrix.m_part(m, i) < matrix.m_nnu) {
x(m, i) = X_u(matrix.m_part(m, i));
}
}
}
}
template <class Solver>
inline void MatrixPartitionedSolver<Solver>::solve(
MatrixPartitioned& matrix, const xt::xtensor<double, 1>& b, xt::xtensor<double, 1>& x)
{
GOOSEFEM_ASSERT(b.size() == matrix.m_ndof);
GOOSEFEM_ASSERT(x.size() == matrix.m_ndof);
this->factorize(matrix);
Eigen::VectorXd B_u = matrix.AsDofs_u(b);
Eigen::VectorXd X_p = matrix.AsDofs_p(x);
Eigen::VectorXd X_u = m_solver.solve(Eigen::VectorXd(B_u - matrix.m_Aup * X_p));
#pragma omp parallel for
for (size_t d = 0; d < matrix.m_nnu; ++d) {
x(matrix.m_iiu(d)) = X_u(d);
}
}
template <class Solver>
inline void MatrixPartitionedSolver<Solver>::solve_u(
MatrixPartitioned& matrix,
const xt::xtensor<double, 1>& b_u,
const xt::xtensor<double, 1>& x_p,
xt::xtensor<double, 1>& x_u)
{
GOOSEFEM_ASSERT(b_u.size() == matrix.m_nnu);
GOOSEFEM_ASSERT(x_p.size() == matrix.m_nnp);
GOOSEFEM_ASSERT(x_u.size() == matrix.m_nnu);
this->factorize(matrix);
Eigen::Map<Eigen::VectorXd>(x_u.data(), x_u.size()).noalias() = m_solver.solve(Eigen::VectorXd(
Eigen::Map<const Eigen::VectorXd>(b_u.data(), b_u.size()) -
matrix.m_Aup * Eigen::Map<const Eigen::VectorXd>(x_p.data(), x_p.size())));
}
template <class Solver>
inline xt::xtensor<double, 2> MatrixPartitionedSolver<Solver>::Solve(
MatrixPartitioned& matrix, const xt::xtensor<double, 2>& b, const xt::xtensor<double, 2>& x)
{
xt::xtensor<double, 2> ret = x;
this->solve(matrix, b, ret);
return ret;
}
template <class Solver>
inline xt::xtensor<double, 1> MatrixPartitionedSolver<Solver>::Solve(
MatrixPartitioned& matrix, const xt::xtensor<double, 1>& b, const xt::xtensor<double, 1>& x)
{
xt::xtensor<double, 1> ret = x;
this->solve(matrix, b, ret);
return ret;
}
template <class Solver>
inline xt::xtensor<double, 1> MatrixPartitionedSolver<Solver>::Solve_u(
MatrixPartitioned& matrix, const xt::xtensor<double, 1>& b_u, const xt::xtensor<double, 1>& x_p)
{
xt::xtensor<double, 1> x_u = xt::empty<double>({matrix.m_nnu});
this->solve_u(matrix, b_u, x_p, x_u);
return x_u;
}
} // namespace GooseFEM
#endif
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