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#[macro_use]
mod error;
use minifb::{Key, Window, WindowOptions};
fn hsv_to_rgb(H: f64, S: f64, V: f64) -> u32 {
let s: f64 = S / 100.0;
let v: f64 = V / 100.0;
let C: f64 = s * v;
let mut A: f64 = H / 60.0;
A %= 2.0f64;
let X: f64 = C * (1f64 - (A - 1f64).abs());
let m: f64 = v - C;
let mut r: f64;
let mut g: f64;
let mut b: f64;
if H >= 0.0 && H < 60.0 {
r = C;
g = X;
b = 0.0;
} else if H >= 60.0 && H < 120.0 {
r = X;
g = C;
b = 0.0;
} else if H >= 120.0 && H < 180.0 {
r = 0.0;
g = C;
b = X;
} else if H >= 180.0 && H < 240.0 {
r = 0.0;
g = X;
b = C;
} else if H >= 240.0 && H < 300.0 {
r = X;
g = 0.0;
b = C;
} else {
r = C;
g = 0.0;
b = X;
}
let red: u32 = ((r + m) * 255.0) as u32;
let green: u32 = ((g + m) * 255.0) as u32;
let blue: u32 = ((b + m) * 255.0) as u32;
((red as u32) << 16) | ((green as u32) << 8) | blue as u32
}
async fn run(width: usize, height: usize) -> Result<(), error::TracerError> {
let mut screen_buffer: Vec<u32> = vec![0; width * height];
let mut window = Window::new("racer-tracer", width, height, WindowOptions::default())
.expect("Unable to create window");
window.limit_update_rate(Some(std::time::Duration::from_micros(16600)));
let mut count = 1;
while window.is_open() && !window.is_key_down(Key::Escape) {
count = (count + 1) % 360;
let color = hsv_to_rgb(count as f64, 100.0, 100.0);
for i in screen_buffer.iter_mut() {
*i = color;
}
window
.update_with_buffer(&screen_buffer, width, height)
.map_err(|e| error::TracerError::FailedToUpdateWindow(e.to_string()))?;
}
Ok(())
}
#[tokio::main]
async fn main() {
if let Err(e) = run(640, 480).await {
eprintln!("{}", e);
std::process::exit(e.into())
}
}
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