MPQC 2.3.1

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matrix3.h
1 //
2 // matrix3.h
3 //
4 // Copyright (C) 1996 Limit Point Systems, Inc.
5 //
6 // Author: Curtis Janssen <cljanss@limitpt.com>
7 // Maintainer: LPS
8 //
9 // This file is part of the SC Toolkit.
10 //
11 // The SC Toolkit is free software; you can redistribute it and/or modify
12 // it under the terms of the GNU Library General Public License as published by
13 // the Free Software Foundation; either version 2, or (at your option)
14 // any later version.
15 //
16 // The SC Toolkit is distributed in the hope that it will be useful,
17 // but WITHOUT ANY WARRANTY; without even the implied warranty of
18 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 // GNU Library General Public License for more details.
20 //
21 // You should have received a copy of the GNU Library General Public License
22 // along with the SC Toolkit; see the file COPYING.LIB. If not, write to
23 // the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
24 //
25 // The U.S. Government is granted a limited license as per AL 91-7.
26 //
27
28 #ifndef _math_scmat_matrix3_h
29 #define _math_scmat_matrix3_h
30 #ifdef __GNUC__
31 #pragma interface
32 #endif
33
34 #include <iostream>
35 #include <math.h>
36
37 #include <math/scmat/vector3.h>
38
39 namespace sc {
40
41 class RefSCmatrix;
42
43 class SCMatrix3
44 {
45 private:
46 double _m[9];
47 public:
48 SCMatrix3() {}
49 SCMatrix3(const SCMatrix3&);
50 #if 0
51 SCMatrix3(const RefSCMatrix3&);
52 #endif
53 SCMatrix3(double x[9]);
54 SCMatrix3(const SCVector3&p1, const SCVector3&p2, const SCVector3&p3);
55 ~SCMatrix3() {}
56 SCMatrix3& operator=(const SCMatrix3&);
57 SCMatrix3 operator*(double) const;
58 SCMatrix3 operator*(const SCMatrix3&) const;
59 SCVector3 operator*(const SCVector3&v) const {
60 SCVector3 result;
61 result._v[0] = _m[0+3*0]*v._v[0]+_m[0+3*1]*v._v[1]+_m[0+3*2]*v._v[2];
62 result._v[1] = _m[1+3*0]*v._v[0]+_m[1+3*1]*v._v[1]+_m[1+3*2]*v._v[2];
63 result._v[2] = _m[2+3*0]*v._v[0]+_m[2+3*1]*v._v[1]+_m[2+3*2]*v._v[2];
64 return result;
65 }
66 SCMatrix3 operator+(const SCMatrix3&) const;
67 SCMatrix3 operator-(const SCMatrix3&) const;
68 double& elem(int i, int j) { return _m[i+3*j]; }
69 const double& elem(int i, int j) const { return _m[i+3*j]; }
70 double& elem(int i) { return _m[i]; }
71 const double& elem(int i) const { return _m[i]; }
72 double& operator[] (int i) { return _m[i]; }
73 const double& operator[] (int i) const { return _m[i]; }
74 double& operator() (int i, int j) { return _m[i+3*j]; }
75 const double& operator() (int i, int j) const { return _m[i+3*j]; }
76 const double* data() const { return _m; }
77 void print(std::ostream& =ExEnv::out0()) const;
78 };
79 SCMatrix3 operator*(double,const SCMatrix3&);
80 SCMatrix3 rotation_mat(const SCVector3&, const SCVector3&, double theta);
81 SCMatrix3 rotation_mat(const SCVector3&, const SCVector3&);
82 SCMatrix3 rotation_mat(const SCVector3&, double theta);
83 SCMatrix3 reflection_mat(const SCVector3&);
84 inline int delta(int i, int j) { return i==j; }
85
86 }
87
88 #endif
89
90 // Local Variables:
91 // mode: c++
92 // c-file-style: "CLJ"
93 // End: