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Merge branch 'eigen_datatructures' into 2D

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This commit is contained in:
Max Luebke 2022-02-08 11:33:16 +01:00
commit 93a84fa624
2 changed files with 16 additions and 11 deletions
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23
src/BTCSDiffusion.cpp
View File

@ -2,6 +2,8 @@
#include <Eigen/SparseLU>
#include <Eigen/src/Core/Map.h>
#include <Eigen/src/Core/Matrix.h>
#include <algorithm>
#include <cassert>
#include <iomanip>
@ -68,7 +70,8 @@ void BTCSDiffusion::updateInternals() {
bc.resize(cells, {BTCSDiffusion::BC_CLOSED, 0});
}
void BTCSDiffusion::simulate1D(std::vector<double> &c, boundary_condition left,
void BTCSDiffusion::simulate1D(Eigen::Map<Eigen::VectorXd> &c,
boundary_condition left,
boundary_condition right,
const std::vector<double> &alpha, double dx,
int size) {
@ -76,10 +79,10 @@ void BTCSDiffusion::simulate1D(std::vector<double> &c, boundary_condition left,
bool left_is_constant = (left.type == BTCSDiffusion::BC_CONSTANT);
bool right_is_constant = (right.type == BTCSDiffusion::BC_CONSTANT);
//The sizes for matrix and vectors of the equation system is defined by the
//actual size of the input vector and if the system is (partially) closed.
//Then we will need ghost nodes. So this variable will give the count of ghost
//nodes.
// The sizes for matrix and vectors of the equation system is defined by the
// actual size of the input vector and if the system is (partially) closed.
// Then we will need ghost nodes. So this variable will give the count of
// ghost nodes.
int bc_offset = !left_is_constant + !right_is_constant;
;
@ -131,10 +134,8 @@ void BTCSDiffusion::simulate1D(std::vector<double> &c, boundary_condition left,
solveLES();
//fill solution back in place into =c= vector
for (int i = 0, j = i + !left_is_constant; i < c.size(); i++, j++) {
c[i] = x_vector[i + !left_is_constant];
}
// write back result to input/output vector
c = x_vector.segment(!left_is_constant, c.size());
}
void BTCSDiffusion::setTimestep(double time_step) {
@ -144,7 +145,9 @@ void BTCSDiffusion::setTimestep(double time_step) {
void BTCSDiffusion::simulate(std::vector<double> &c,
const std::vector<double> &alpha) {
if (this->grid_dim == 1) {
simulate1D(c, bc[0], bc[grid_cells[0] + 1], alpha, this->deltas[0],
assert(c.size() == grid_cells[0]);
Eigen::Map<Eigen::VectorXd> c_in(c.data(), this->grid_cells[0]);
simulate1D(c_in, bc[0], bc[grid_cells[0] + 1], alpha, this->deltas[0],
this->grid_cells[0]);
}
if (this->grid_dim == 2) {

4
src/BTCSDiffusion.hpp
View File

@ -2,6 +2,8 @@
#define BTCSDIFFUSION_H_
#include <Eigen/Sparse>
#include <Eigen/src/Core/Map.h>
#include <Eigen/src/Core/Matrix.h>
#include <tuple>
#include <type_traits>
#include <vector>
@ -135,7 +137,7 @@ private:
} boundary_condition;
typedef Eigen::Triplet<double> T;
void simulate1D(std::vector<double> &c, boundary_condition left,
void simulate1D(Eigen::Map<Eigen::VectorXd> &c, boundary_condition left,
boundary_condition right, const std::vector<double> &alpha,
double dx, int size);
void simulate2D(std::vector<double> &c);