source: ThirdParty/vmg/src/base/matrix.hpp@ 33a694

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Last change on this file since 33a694 was 7faa5c, checked in by Frederik Heber <heber@…>, 8 years ago

Merge commit 'de061d9d851257a04e924d4472df4523d33bb08b' as 'ThirdParty/vmg'

  • Property mode set to 100644
File size: 1.7 KB
Line 
1/*
2 * vmg - a versatile multigrid solver
3 * Copyright (C) 2012 Institute for Numerical Simulation, University of Bonn
4 *
5 * vmg is free software: you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation, either version 3 of the License, or
8 * (at your option) any later version.
9 *
10 * vmg is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program. If not, see <http://www.gnu.org/licenses/>.
17 */
18
19/**
20 * @file matrix.hpp
21 * @author Julian Iseringhausen <isering@ins.uni-bonn.de>
22 * @date Mon Apr 18 12:20:22 2011
23 *
24 * @brief Header file for the class VMG::Matrix, which represents a 3x3 matrix
25 * and defines some useful operations.
26 *
27 */
28
29#ifndef MATRIX_HPP_
30#define MATRIX_HPP_
31
32#include "base/vector.hpp"
33
34namespace VMG
35{
36
37class Matrix
38{
39public:
40 Matrix()
41 {
42 for (int i=0; i<9; i++)
43 mat[i] = 0.0;
44 }
45
46 vmg_float& operator() (int i, int j) {return mat[j+3*i];}
47 const vmg_float& GetVal(int i, int j) const {return mat[j+3*i];}
48
49 const Vector operator*(const Vector& rhs) const
50 {
51 Vector result;
52
53 for (int i=0; i<3; i++) {
54 result.X() += this->GetVal(0, i) * rhs.X();
55 result.Y() += this->GetVal(1, i) * rhs.Y();
56 result.Z() += this->GetVal(2, i) * rhs.Z();
57 }
58
59 return result;
60 }
61
62private:
63 vmg_float mat[9];
64};
65
66const Matrix abT(const Vector lhs, const Vector rhs);
67
68}
69
70#endif /* MATRIX_HPP_ */
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