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
|
use std::error::Error;
use engine::color::Color;
use engine::object::{Builder as ObjectBuilder, Id as ObjectId};
use engine::vector::Vec3;
use engine::vertex::Builder as VertexBuilder;
use engine::{Engine, Key, WindowSize};
use tracing::Level;
use tracing_subscriber::FmtSubscriber;
const WINDOW_SIZE: WindowSize = WindowSize { width: 500, height: 600 };
const BLUE: Color<f32> = Color { red: 0.0, blue: 1.0, green: 0.0 };
fn main() -> Result<(), Box<dyn Error>>
{
let subscriber = FmtSubscriber::builder()
.with_max_level(Level::TRACE)
.finish();
tracing::subscriber::set_global_default(subscriber)?;
let mut engine = Engine::new(&WINDOW_SIZE, "Yaaay lmao")?;
let mut triangle = ObjectBuilder::new()
.vertices([
VertexBuilder::new()
.pos(Vec3 { x: -0.5, y: -0.5, z: 0.0 })
.color(Color { red: 1.0, green: 0.0, blue: 0.0 })
.build()
.unwrap(),
VertexBuilder::new()
.pos(Vec3 { x: 0.5, y: -0.5, z: 0.0 })
.color(Color { red: 0.0, green: 1.0, blue: 0.0 })
.build()
.unwrap(),
VertexBuilder::new()
.pos(Vec3 { x: 0.0, y: 0.5, z: 0.0 })
.color(Color { red: 0.0, green: 0.0, blue: 1.0 })
.build()
.unwrap(),
])
.build(ObjectId::new(1))?;
triangle.translate(Vec3 { x: 0.0, y: 0.4, z: 0.0 });
engine.add_object(triangle);
let square = ObjectBuilder::new()
.vertices([
VertexBuilder::new()
.pos(Vec3 { x: 0.5, y: 0.5, z: 0.0 })
.color(BLUE)
.build()
.unwrap(),
VertexBuilder::new()
.pos(Vec3 { x: 0.5, y: -0.5, z: 0.0 })
.color(BLUE)
.build()
.unwrap(),
VertexBuilder::new()
.pos(Vec3 { x: -0.5, y: -0.5, z: 0.0 })
.color(BLUE)
.build()
.unwrap(),
VertexBuilder::new()
.pos(Vec3 { x: -0.5, y: 0.5, z: 0.0 })
.color(BLUE)
.build()
.unwrap(),
])
.indices([0, 1, 3, 1, 2, 3])
.build(ObjectId::new(2))?;
engine.add_object(square);
let cam_speed = 3.0;
engine.start(|engine| {
let delta_time = *engine.delta_time();
if engine.is_key_pressed(Key::W).unwrap() {
let cam_target_direction = engine.camera().target_direction().clone();
*engine.camera_mut().position_mut() +=
cam_target_direction * cam_speed * delta_time.as_secs_f32();
}
if engine.is_key_pressed(Key::S).unwrap() {
let rev_cam_target_direction = -engine.camera().target_direction().clone();
*engine.camera_mut().position_mut() +=
rev_cam_target_direction * cam_speed * delta_time.as_secs_f32();
}
if engine.is_key_pressed(Key::A).unwrap() {
let cam_left = engine.camera().left().clone();
// Camera speed adjusted to be same no matter how far the distance is to the
// camera target
let cam_speed_dist_adj = cam_speed
* (engine.camera().position() - engine.camera().target()).length();
*engine.camera_mut().position_mut() +=
cam_left * cam_speed_dist_adj * delta_time.as_secs_f32();
}
if engine.is_key_pressed(Key::D).unwrap() {
let cam_right = engine.camera().right().clone();
// Camera speed adjusted to be same no matter how far the distance is to the
// camera target
let cam_speed_dist_adj = cam_speed
* (engine.camera().position() - engine.camera().target()).length();
*engine.camera_mut().position_mut() +=
cam_right * cam_speed_dist_adj * delta_time.as_secs_f32();
}
})?;
Ok(())
}
|
