-
Notifications
You must be signed in to change notification settings - Fork 0
/
bullet.cpp
92 lines (80 loc) · 1.82 KB
/
bullet.cpp
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
#include "bullet.h"
#include <algorithm>
#include <cassert>
#include <cmath>
bullet::bullet(
const double damage,
const double x,
const double y,
const double speed_x,
const double speed_y,
const int n_frames_to_live
)
: m_damage{damage},
m_n_frames_left{n_frames_to_live},
m_speed_x{speed_x},
m_speed_y{speed_y},
m_x{x},
m_y{y}
{}
bool is_moving(const bullet& b) noexcept
{
return b.get_speed_x() != 0.0 || b.get_speed_y() != 0.0;
}
bool is_dead(const bullet& any_bullet)
{
return !any_bullet.is_alive();
}
void remove_dead_bullets(std::vector<bullet> &bullets)
{
for(int i=0; i < static_cast<int>(bullets.size()); ++i)
{
if(is_dead(bullets[i]))
{
bullets[i] = bullets.back();
bullets.pop_back();
--i;
}
}
}
void bullet::move(const double world_size)
{
assert(world_size > 0.0);
//Keep m_x in [0, world_size>
m_x = std::fmod(m_x + m_speed_x + world_size, world_size);
//Keep m_y in [0, world_size>
m_y = std::fmod(m_y + m_speed_y + world_size, world_size);
--m_n_frames_left;
}
void bullet::set_position(const double x, const double y)
{
m_x = x;
m_y = y;
}
void bullet::slow_down()
{
m_speed_x *= 0.999;
m_speed_y *= 0.999;
}
void stop(bullet& b) noexcept
{
b.set_speed_x(0.0);
b.set_speed_y(0.0);
}
std::ostream& operator<<(std::ostream& os, const bullet& b) noexcept
{
os
<< "Speed: " << b.get_speed_x() << ',' << b.get_speed_y() << '\n'
<< "Position: " << b.get_x() << ',' << b.get_y() << '\n'
;
return os;
}
bool operator==(const bullet& lhs, const bullet& rhs) noexcept
{
return lhs.get_damage() == rhs.get_damage()
&& lhs.get_position() == rhs.get_position()
&& lhs.get_speed_x() == rhs.get_speed_x()
&& lhs.get_speed_y() == rhs.get_speed_y()
&& lhs.get_x() == rhs.get_x()
&& lhs.get_y() == rhs.get_y();
}