morphPoints function

src/lib/shapes/morph.ts

@@ -0,0 +1,18 @@
+import type { Point } from "./points";
+
+// lerps each point pair by factor t
+export function morphPoints(fromPoints: Point[], toPoints: Point[], t: number): Point[] {
+    if (fromPoints.length !== toPoints.length) {
+        throw new Error(
+            `Point arrays must have the same length. Got ${fromPoints.length} and ${toPoints.length}`,
+        );
+    }
+
+    return fromPoints.map((from, i) => {
+        const to = toPoints[i];
+        return {
+            x: from.x + (to.x - from.x) * t,
+            y: from.y + (to.y - from.y) * t,
+        };
+    });
+}