fix: Actual segments not approximations

packages/element/src/bounds.ts

@@ -322,38 +322,42 @@ export const getElementLineSegments = (
 
   if (shape.type === "polycurve") {
     const curves = shape.data;
-    const points = curves
+    const pointsOnCurves = curves.map((curve) =>
-      .map((curve) => pointsOnBezierCurves(curve, 10))
+      pointsOnBezierCurves(curve, 10),
-      .flat();
+    );
+
     const segments: LineSegment<GlobalPoint>[] = [];
 
-    let i = 0;
+    if (
+      (isLineElement(element) && !element.polygon) ||
+      isArrowElement(element)
+    ) {
+      for (const points of pointsOnCurves) {
+        let i = 0;
 
-    while (i < points.length - 1) {
+        while (i < points.length - 1) {
-      const p1 = pointFrom(points[i + 1][0], points[i][1]);
+          segments.push(
-      const p2 = pointFrom(points[i][0], points[i + 1][1]);
+            lineSegment(
-      const alignsWithStart = pointDistance(p1, points[0] as GlobalPoint) < 1;
+              pointFrom(points[i][0], points[i][1]),
-      const alignsWithEnd =
+              pointFrom(points[i + 1][0], points[i + 1][1]),
-        pointDistance(p2, points[points.length - 1] as GlobalPoint) < 1;
+            ),
-
+          );
-      // Avoid closing the polycurve for non-polygon lines and arrows
+          i++;
-      if (
+        }
-        ((isLineElement(element) && !element.polygon) ||
-          isArrowElement(element)) &&
-        alignsWithStart &&
-        alignsWithEnd
-      ) {
-        i++;
-        continue;
       }
+    } else {
+      const points = pointsOnCurves.flat();
+      let i = 0;
 
-      segments.push(
+      while (i < points.length - 1) {
-        lineSegment(
+        segments.push(
-          pointFrom(points[i][0], points[i][1]),
+          lineSegment(
-          pointFrom(points[i + 1][0], points[i + 1][1]),
+            pointFrom(points[i][0], points[i][1]),
-        ),
+            pointFrom(points[i + 1][0], points[i + 1][1]),
-      );
+          ),
-      i++;
+        );
+        i++;
+      }
     }
 
     return segments;