1 | // |
---|
2 | // vector3.h |
---|
3 | // |
---|
4 | // C++ class for 3-element vectors |
---|
5 | // |
---|
6 | // Copyright (C) 2000-2002, Mark R. Shinwell. |
---|
7 | // Copyright (C) 2002-2004,2005,2006 Olly Betts |
---|
8 | // |
---|
9 | // This program is free software; you can redistribute it and/or modify |
---|
10 | // it under the terms of the GNU General Public License as published by |
---|
11 | // the Free Software Foundation; either version 2 of the License, or |
---|
12 | // (at your option) any later version. |
---|
13 | // |
---|
14 | // This program is distributed in the hope that it will be useful, |
---|
15 | // but WITHOUT ANY WARRANTY; without even the implied warranty of |
---|
16 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
---|
17 | // GNU General Public License for more details. |
---|
18 | // |
---|
19 | // You should have received a copy of the GNU General Public License |
---|
20 | // along with this program; if not, write to the Free Software |
---|
21 | // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
---|
22 | // |
---|
23 | |
---|
24 | #ifndef Vector3_h |
---|
25 | #define Vector3_h |
---|
26 | |
---|
27 | #include <math.h> |
---|
28 | |
---|
29 | class Vector3 { |
---|
30 | protected: |
---|
31 | double x, y, z; |
---|
32 | |
---|
33 | public: |
---|
34 | Vector3() : x(0.0), y(0.0), z(0.0) { } |
---|
35 | Vector3(double a, double b, double c) : x(a), y(b), z(c) { } |
---|
36 | |
---|
37 | double GetX() const { return x; } |
---|
38 | double GetY() const { return y; } |
---|
39 | double GetZ() const { return z; } |
---|
40 | |
---|
41 | double magnitude() const { |
---|
42 | return sqrt(x*x + y*y + z*z); |
---|
43 | } |
---|
44 | |
---|
45 | void normalise(); |
---|
46 | |
---|
47 | void assign(double a, double b, double c) { |
---|
48 | x = a; y = b; z = c; |
---|
49 | } |
---|
50 | |
---|
51 | friend Vector3 operator-(const Vector3& o) { |
---|
52 | return Vector3(-o.x, -o.y, -o.z); |
---|
53 | } |
---|
54 | Vector3& operator*=(double); |
---|
55 | Vector3& operator/=(double); |
---|
56 | Vector3& operator+=(const Vector3&); |
---|
57 | Vector3& operator-=(const Vector3&); |
---|
58 | Vector3& operator=(const Vector3& o) { |
---|
59 | x = o.x; y = o.y; z = o.z; |
---|
60 | return *this; |
---|
61 | } |
---|
62 | |
---|
63 | friend Vector3 operator*(double, const Vector3&); |
---|
64 | friend Vector3 operator*(const Vector3& v, double f) { |
---|
65 | return f * v; |
---|
66 | } |
---|
67 | friend Vector3 operator*(const Vector3&, const Vector3&); // cross product |
---|
68 | friend Vector3 operator+(const Vector3&, const Vector3&); |
---|
69 | friend Vector3 operator-(const Vector3&, const Vector3&); |
---|
70 | friend bool operator==(const Vector3&, const Vector3&); |
---|
71 | friend bool operator<(const Vector3&, const Vector3&); |
---|
72 | friend double dot(const Vector3&, const Vector3&); |
---|
73 | }; |
---|
74 | |
---|
75 | inline bool operator==(const Vector3& a, const Vector3& b) { |
---|
76 | return a.x == b.x && a.y == b.y && a.z == b.z; |
---|
77 | } |
---|
78 | |
---|
79 | // So we can use Vector3 as a key in a map... |
---|
80 | inline bool operator<(const Vector3& a, const Vector3& b) { |
---|
81 | if (a.x != b.x) return a.x < b.x; |
---|
82 | if (a.y != b.y) return a.y < b.y; |
---|
83 | return a.z < b.z; |
---|
84 | } |
---|
85 | |
---|
86 | #endif |
---|