1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
|
/*
* The ManaPlus Client
* Copyright (C) 2007-2009 The Mana World Development Team
* Copyright (C) 2009-2010 The Mana Developers
* Copyright (C) 2011-2019 The ManaPlus Developers
*
* This file is part of The ManaPlus Client.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef RESOURCES_VECTOR_H
#define RESOURCES_VECTOR_H
#ifndef USE_SDL2
#include <cmath>
#endif // USE_SDL2
#include <iostream>
#include "localconsts.h"
/**
* Vector class. Represents either a 3D point in space, a velocity or a force.
* Provides several convenient operator overloads.
*/
class Vector final
{
public:
/**
* Constructor.
*/
Vector() :
x(0.0F),
y(0.0F),
z(0.0F)
{}
/**
* Constructor.
*/
Vector(const float x0,
const float y0,
const float z0) :
x(x0),
y(y0),
z(z0)
{}
/**
* Copy constructor.
*/
Vector(const Vector &v) :
x(v.x),
y(v.y),
z(v.z)
{}
A_DEFAULT_COPY(Vector)
/**
* Returns true if all coordinates are set to 0, otherwise returns
* false.
*/
bool isNull() const noexcept2 A_WARN_UNUSED
{
return x == 0.0F && y == 0.0F && z == 0.0F;
}
Vector &operator=(const Vector &v) noexcept2
{
x = v.x;
y = v.y;
z = v.z;
return *this;
}
/**
* Scale vector operator.
*/
Vector operator*(const float c) const noexcept2 A_WARN_UNUSED
{
return Vector(x * c,
y * c,
z * c);
}
/**
* In-place scale vector operator.
*/
Vector &operator*=(const float c) noexcept2
{
x *= c;
y *= c;
z *= c;
return *this;
}
/**
* Scale vector operator.
*/
Vector operator/(const float c) const noexcept2 A_WARN_UNUSED
{
return Vector(x / c,
y / c,
z / c);
}
/**
* In-place scale vector operator.
*/
Vector &operator/=(const float c) noexcept2 A_WARN_UNUSED
{
x /= c;
y /= c;
z /= c;
return *this;
}
/**
* Add vector operator.
*/
Vector operator+(const Vector &v) const noexcept2 A_WARN_UNUSED
{
return Vector(x + v.x,
y + v.y,
z + v.z);
}
/**
* In-place add vector operator.
*/
Vector &operator+=(const Vector &v) noexcept2
{
x += v.x;
y += v.y;
z += v.z;
return *this;
}
/**
* Subtract vector operator.
*/
Vector operator-(const Vector &v) const noexcept2 A_WARN_UNUSED
{
return Vector(x - v.x,
y - v.y,
z - v.z);
}
/**
* In-place subtract vector operator.
*/
Vector &operator-=(const Vector &v) noexcept2
{
x -= v.x;
y -= v.y;
z -= v.z;
return *this;
}
/**
* Returns the length of this vector. This method does a relatively
* slow square root.
*/
float length() const A_WARN_UNUSED
{
return sqrtf(x * x + y * y + z * z);
}
/**
* Returns the squared length of this vector. Avoids the square root.
*/
float squaredLength() const noexcept2 A_WARN_UNUSED
{
return x * x + y * y + z * z;
}
/**
* Returns the manhattan length of this vector.
*/
float manhattanLength() const A_WARN_UNUSED
{
return fabsf(x) + fabsf(y) + fabsf(z);
}
/**
* Returns a normalized version of this vector. This is a unit vector
* running parallel to it.
*/
Vector normalized() const A_WARN_UNUSED
{
const float len = length();
return Vector(x / len, y / len, z / len);
}
float x, y, z;
};
/**
* Appends a string representation of a vector to the output stream.
*/
std::ostream& operator <<(std::ostream &os, const Vector &v);
#endif // RESOURCES_VECTOR_H
|
