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
|
extern crate sdl2;
extern crate tempfile;
mod state;
mod player;
mod constants;
mod gates;
use state::Positioned;
use state::Drawable;
use state::Bullet;
use std::io::Write;
enum Result {
Win,
Loss,
Nothing,
}
struct Textures<'a> {
player: sdl2::render::Texture<'a>,
enemy: sdl2::render::Texture<'a>,
pbullet: sdl2::render::Texture<'a>,
ebullet: sdl2::render::Texture<'a>,
}
fn frame<T: state::Enemy<U>, U: state::Bullet>(canvas: &mut sdl2::render::WindowCanvas, state: &mut state::State<T, U>, events: &mut sdl2::event::EventPollIterator, textures: &Textures) -> Result {
let mut new_bullets = Vec::new();
let count = state.count;
for enemy in state.enemies.iter_mut() {
new_bullets.append(&mut enemy.act(count));
}
for bullet in state.bullets.iter_mut() {
bullet.act();
}
for bullet in state.player_bullets.iter_mut() {
bullet.act();
}
state.player.act(events);
if count % state.player.fire_rate as u64 == 0 {
state.player_bullets.push(state::PBullet::new(state.player.x, 0., state.player.y, -3.5));
}
if state.bullets.iter().any(|bullet| state.player.overlaps(bullet)) || new_bullets.iter().any(|bullet| state.player.overlaps(bullet)) {
return Result::Loss;
}
for enemy in state.enemies.iter_mut() {
for bullet in state.player_bullets.iter_mut() {
if enemy.overlaps(bullet) {
bullet.delete();
let health = enemy.health();
enemy.set_health(health - state::PBullet::damage());
}
}
}
state.enemies.retain(|enemy| state::Enemy::health(enemy) > 0.);
if state.enemies.len() == 0 {
return Result::Win;
}
state.bullets.retain(|bullet| !U::outside(bullet));
state.bullets.append(&mut new_bullets);
state.player_bullets.retain(|bullet| !state::PBullet::outside(bullet));
for bullet in state.player_bullets.iter() {
bullet.draw(canvas, &textures.pbullet);
}
for enemy in state.enemies.iter() {
enemy.draw(canvas, &textures.enemy);
}
state.player.draw(canvas, &textures.player);
for bullet in state.bullets.iter() {
bullet.draw(canvas, &textures.ebullet);
}
canvas.set_draw_color(sdl2::pixels::Color::RGB(255, 0, 0));
canvas.draw_rect(sdl2::rect::Rect::new(0, 0, (state.enemies[0].health() * constants::X_DIM as f64).round() as u32, 20)).unwrap();
state.count += 1;
Result::Nothing
}
/* Why tf do I not need a lifetime here? */
fn get_surface(bytes: &[u8]) -> sdl2::surface::Surface {
/* Wow what a risky function */
let mut f = tempfile::NamedTempFile::new().unwrap();
f.write(bytes).unwrap();
f.flush().unwrap();
sdl2::image::LoadSurface::from_file(f.path()).unwrap()
}
fn get_player_surface() -> sdl2::surface::Surface<'static> {
get_surface(include_bytes!("assets/stallman.png"))
}
fn get_enemy_surface() -> sdl2::surface::Surface<'static> {
get_surface(include_bytes!("assets/gates.png"))
}
fn get_ebullet_surface() -> sdl2::surface::Surface<'static> {
get_surface(include_bytes!("assets/binary_blob.png"))
}
fn get_pbullet_surface() -> sdl2::surface::Surface<'static> {
get_surface(include_bytes!("assets/player_pepp.png"))
}
fn main() {
let sdl_context = sdl2::init().unwrap();
let video_subsystem = sdl_context.video().unwrap();
let window = video_subsystem.window("rust-sdl2 demo", constants::X_DIM, constants::Y_DIM).position_centered().build().unwrap();
let mut canvas = window.into_canvas().build().unwrap();
canvas.set_draw_color(sdl2::pixels::Color::RGB(255, 255, 255));
canvas.clear();
canvas.present();
let mut event_pump = sdl_context.event_pump().unwrap();
let frame_duration = std::time::Duration::new(0, 1_000_000_000u32 / 60);
let mut state: state::State<gates::Gates, gates::GatesBullet> = state::State::new();
let mut won = false;
let player_surface = get_player_surface();
let enemy_surface = get_enemy_surface();
let ebullet_surface = get_ebullet_surface();
let pbullet_surface = get_pbullet_surface();
let texture_creator = canvas.texture_creator();
let player_texture = texture_creator.create_texture_from_surface(player_surface).unwrap();
let enemy_texture = texture_creator.create_texture_from_surface(enemy_surface).unwrap();
let ebullet_texture = texture_creator.create_texture_from_surface(ebullet_surface).unwrap();
let pbullet_texture = texture_creator.create_texture_from_surface(pbullet_surface).unwrap();
let surfaces = Textures { player: player_texture, enemy: enemy_texture, pbullet: pbullet_texture, ebullet: ebullet_texture };
'running: loop {
let start = std::time::Instant::now();
if won {
for event in event_pump.poll_iter() {
match event {
sdl2::event::Event::Quit {..} | sdl2::event::Event::KeyDown { keycode: Some(sdl2::keyboard::Keycode::Escape), .. } => {
std::process::exit(0);
},
_ => { },
}
}
} else {
canvas.set_draw_color(sdl2::pixels::Color::RGB(255, 255, 255));
canvas.clear();
match frame(&mut canvas, &mut state, &mut event_pump.poll_iter(), &surfaces) {
Result::Loss => {
break;
}
Result::Win => {
canvas.set_draw_color(sdl2::pixels::Color::RGB(255, 204, 102));
canvas.clear();
canvas.present();
won = true;
}
_ => {
canvas.present();
}
}
}
/* Make sure this iteration took a whole frame */
match frame_duration.checked_sub(start.elapsed()) {
Some(t) => std::thread::sleep(t),
None => (),
}
}
}
|
