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
|
use std::{
num::NonZeroU32,
rc::Rc,
time::{Duration, Instant},
};
use gilrs::{Axis, GamepadId, Gilrs};
use softbuffer::{Buffer, Context, Surface};
use tracing::level_filters::LevelFilter;
use tracing_subscriber::EnvFilter;
use winit::{
application::ApplicationHandler,
dpi::LogicalSize,
event::{DeviceEvent, WindowEvent},
event_loop::{ControlFlow, EventLoop},
window::Window,
};
fn main() {
setup_logging();
let el = EventLoop::new().unwrap();
// We NEED poll here because of how gilrs does events
el.set_control_flow(ControlFlow::Poll);
let mut etch = Etch {
window: None,
gilrs: Gilrs::new().unwrap(),
dial: DialState::default(),
left_angle: 0.0,
next_check: Instant::now(),
};
el.run_app(&mut etch);
}
fn setup_logging() {
let env_filter =
EnvFilter::builder().with_default_directive(LevelFilter::INFO.into()).from_env().unwrap();
tracing_subscriber::fmt().with_env_filter(env_filter).init();
}
#[derive(Copy, Clone, Debug, Default)]
struct DialState {
left_x: f32,
left_y: f32,
right_x: f32,
right_y: f32,
}
struct SurfacedWindow {
window: Rc<Window>,
surface: Surface<Rc<Window>, Rc<Window>>,
}
struct Etch {
window: Option<SurfacedWindow>,
gilrs: Gilrs,
dial: DialState,
left_angle: f32,
next_check: Instant,
}
const DIAL_SENSETIVITY: f32 = 2.0;
const WIDTH: f32 = 640.0;
const HEIGHT: f32 = 480.0;
impl ApplicationHandler for Etch {
fn resumed(&mut self, event_loop: &winit::event_loop::ActiveEventLoop) {
let window = Rc::new(event_loop.create_window(Window::default_attributes()).unwrap());
window.set_resizable(false);
window.request_inner_size(LogicalSize::new(WIDTH, HEIGHT));
let ctx = Context::new(window.clone()).unwrap();
let surface = Surface::new(&ctx, window.clone()).unwrap();
self.window = Some(SurfacedWindow { window, surface });
}
fn window_event(
&mut self,
event_loop: &winit::event_loop::ActiveEventLoop,
window_id: winit::window::WindowId,
event: winit::event::WindowEvent,
) {
match event {
WindowEvent::CloseRequested => {
tracing::info!("close requested! shutting down.");
event_loop.exit();
}
WindowEvent::RedrawRequested => {
let previous_dial = self.dial;
// Process gamepad events
while let Some(gilrs::Event {
id, event, time, ..
}) = self.gilrs.next_event()
{
match event {
gilrs::EventType::AxisChanged(axis, value, _code) => {
tracing::trace!("{axis:?} value={value}");
match axis {
Axis::LeftStickX => self.dial.left_x = value * 100.0,
Axis::LeftStickY => self.dial.left_y = value * 100.0,
Axis::RightStickX => self.dial.right_x = value * 100.0,
Axis::RightStickY => self.dial.right_y = value * 100.0,
_ => (),
}
}
_ => (),
}
}
// We check the state of the joystick at 20fps
if self.next_check.elapsed() > Duration::from_millis(50) {
let left_angle = xy_to_deg(self.dial.left_x, self.dial.left_y);
let left_delta = angle_delta(left_angle, self.left_angle);
self.left_angle = left_angle;
tracing::info!("ANGLE {left_angle} // {left_delta}v");
self.next_check = Instant::now();
}
let Some(surfaced) = self.window.as_mut() else {
tracing::warn!("self.window is None in Redraw!");
return;
};
let (width, height) = {
let phys = surfaced.window.inner_size();
(phys.width as usize, phys.height as usize)
};
let mut buffer = surfaced.surface.buffer_mut().unwrap();
for idx in 0..width {
buffer[idx + (height / 2) * width] = 0xFF00FF00;
}
buffer.present().unwrap();
//surfaced.window.request_redraw();
}
WindowEvent::Resized(phys) => {
tracing::trace!("resized window: {phys:?}");
if let Some(surfaced) = self.window.as_mut() {
surfaced
.surface
.resize(
NonZeroU32::new(phys.width).unwrap(),
NonZeroU32::new(phys.height).unwrap(),
)
.unwrap();
}
}
_ => (),
}
}
}
fn xy_to_deg(x: f32, y: f32) -> f32 {
let neg_x = x < 0.0;
let neg_y = y < 0.0;
let raw_angle = (y.abs() / x.abs()).atan().to_degrees();
let raw_angle2 = (x.abs() / y.abs()).atan().to_degrees();
match (neg_x, neg_y) {
(false, false) => raw_angle2 + 270.0,
(false, true) => raw_angle,
(true, true) => raw_angle2 + 90.0,
(true, false) => raw_angle + 180.0,
}
}
/// Compute the difference in angle between the right-hand side
/// and the left-hand side. Intelligently handles the zero-crossing.
/// lhs should be the newer value, rhs the older.
fn angle_delta(lhs: f32, rhs: f32) -> f32 {
if rhs >= 270.0 && lhs < 90.0 {
// It is likely we crossed zero in the clockwise direction
(lhs + 360.0) - rhs
} else if rhs < 90.0 && lhs > 270.0 {
// It is likely we crossed zero in the anti-clockwise direction
lhs - (rhs + 360.0)
} else {
lhs - rhs
}
}
|
