initial commit

path.py

@@ -0,0 +1,30 @@
+from vec import Vec2
+
+
+class Path:
+    def __init__(self, points: list[Vec2], extra_data: list):
+        self.points: list[Vec2] = points
+        self.extra_data = extra_data
+        self.vecs: list[Vec2] = []
+        self._init_vecs()
+
+    def _init_vecs(self) -> None:
+        for i in range(1, len(self.points) - 1):
+            pt1 = self.points[i-1]
+            pt2 = self.points[i]
+            pt3 = self.points[i+1]
+            d1 = pt1 - pt2
+            d2 = pt3 - pt2
+
+            l1 = d1.mag
+            l2 = d2.mag
+
+            d1 = d1.normalized()
+            d2 = d1.normalized()
+
+            d = d1 + d2
+            d = d.normalized()
+            if d2.cross(d) < 0:
+                d = -d
+
+            self.vecs.append(d)