a

1 files changed, 61 insertions, 0 deletions

diff --git a/src/main.rs b/src/main.rs
new file mode 100644
index 0000000..6e9f760
--- /dev/null
+++ b/src/main.rs
@@ -0,0 +1,61 @@
+use std::{
+    env::args,
+    f32::consts::PI,
+    fs::read_to_string,
+    io::{BufWriter, Write, stdout},
+    time::Instant,
+};
+
+fn main() {
+    let mut out = BufWriter::new(stdout());
+    let objects = parse_file(&read_to_string(&args().nth(1).unwrap()).unwrap());
+
+    let start = Instant::now();
+    loop {
+        let time = start.elapsed().as_secs_f32();
+        let mut points = Vec::new();
+
+        for h in &objects {
+            let t = h.time as f32 / 1000.;
+            let trel = time - t;
+            if trel > 0. || trel < -1. {
+                continue;
+            }
+            let x = h.x as f32 / 512.;
+            let y = h.y as f32 / 384.;
+
+            let r = 0.1 + trel / -10.;
+            for i in 0..20 {
+                let t = i as f32 / 20. * PI * 2.;
+                points.push((x + t.sin() * r, y + t.cos() * r));
+            }
+        }
+
+        for (x, y) in points {
+            out.write_all(&f32::to_le_bytes(x)).unwrap();
+            out.write_all(&f32::to_le_bytes(y)).unwrap();
+        }
+    }
+}
+
+struct HitObject {
+    x: i32,
+    y: i32,
+    time: i32,
+}
+
+fn parse_file(s: &str) -> Vec<HitObject> {
+    let mut obs = Vec::new();
+    let b = s.split_once("[HitObjects]").unwrap().1;
+    for line in b.lines() {
+        if line.is_empty() {
+            continue;
+        }
+        let mut toks = line.split(",");
+        let x = toks.next().unwrap().parse().unwrap();
+        let y = toks.next().unwrap().parse().unwrap();
+        let time = toks.next().unwrap().parse().unwrap();
+        obs.push(HitObject { x, y, time })
+    }
+    obs
+}