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Move eigen to third party (#282)

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* remove useless statement

* Add eigen to third_party dir

* remove reducdant lines
This commit is contained in:
Jack Zhou
2022-09-26 19:24:02 +08:00
committed by GitHub
parent 36eb6fbba6
commit 355382ad63
1781 changed files with 420576 additions and 71 deletions
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61
third_party/eigen/demos/mix_eigen_and_c/example.c vendored Normal file
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// This file is part of Eigen, a lightweight C++ template library
// for linear algebra.
//
// Copyright (C) 2009 Benoit Jacob <jacob.benoit.1@gmail.com>
//
// This Source Code Form is subject to the terms of the Mozilla
// Public License v. 2.0. If a copy of the MPL was not distributed
// with this file, You can obtain one at http://mozilla.org/MPL/2.0/.
#include "binary_library.h"
#include "stdio.h"
void demo_MatrixXd() {
struct C_MatrixXd *matrix1, *matrix2, *result;
printf("*** demo_MatrixXd ***\n");
matrix1 = MatrixXd_new(3, 3);
MatrixXd_set_zero(matrix1);
MatrixXd_set_coeff(matrix1, 0, 1, 2.5);
MatrixXd_set_coeff(matrix1, 1, 0, 1.4);
printf("Here is matrix1:\n");
MatrixXd_print(matrix1);
matrix2 = MatrixXd_new(3, 3);
MatrixXd_multiply(matrix1, matrix1, matrix2);
printf("Here is matrix1*matrix1:\n");
MatrixXd_print(matrix2);
MatrixXd_delete(matrix1);
MatrixXd_delete(matrix2);
}
// this helper function takes a plain C array and prints it in one line
void print_array(double *array, int n) {
struct C_Map_MatrixXd *m = Map_MatrixXd_new(array, 1, n);
Map_MatrixXd_print(m);
Map_MatrixXd_delete(m);
}
void demo_Map_MatrixXd() {
struct C_Map_MatrixXd *map;
double array[5];
int i;
printf("*** demo_Map_MatrixXd ***\n");
for (i = 0; i < 5; ++i) array[i] = i;
printf("Initially, the array is:\n");
print_array(array, 5);
map = Map_MatrixXd_new(array, 5, 1);
Map_MatrixXd_add(map, map, map);
Map_MatrixXd_delete(map);
printf("Now the array is:\n");
print_array(array, 5);
}
int main() {
demo_MatrixXd();
demo_Map_MatrixXd();
}