feat: add simple track generator

scripts/track_gen.py

@@ -0,0 +1,40 @@
+import json
+from math import radians
+from pathlib import Path
+from src.utils import ROOT
+from src.vec import Vec
+
+
+def gen_circle(
+    folder: Path, center: Vec, radius: float, n_sides: int, width: float = 1
+):
+    with open(folder / "track.json", "w") as f:
+        pts: list[tuple[float, ...]] = []
+
+        for i in range(n_sides):
+            angle: float = radians(i / n_sides * 360)
+            v: Vec = Vec(1, 0).rotate(angle)
+            pos: Vec = center + v * radius
+            normal: Vec = v
+            pts.append((pos.x, pos.y, normal.x, normal.y, width))
+
+        for i, pt in enumerate(pts):
+            pts[i] = tuple(round(v, 3) for v in pt)
+
+        json.dump([{"type": "road", "pts": pts}], f, indent=4)
+
+    with open(folder / "meta.json", "r") as f:
+        meta: dict = json.load(f)
+
+    meta["start"] = {"pos": [radius, 0], "direction": [0, 1]}
+    with open(folder / "meta.json", "w") as f:
+        json.dump(meta, f, indent=4)
+
+
+def main():
+    folder: Path = ROOT / "assets" / "tracks" / "simple"
+    gen_circle(folder, Vec(0, 0), 30, 36)
+
+
+if __name__ == "__main__":
+    main()