From 1819661828b312a303ed5a74178ff4514bcb39e8 Mon Sep 17 00:00:00 2001
From: Mark Tolmacs <mark@lazycat.hu>
Date: Mon, 3 Mar 2025 15:06:20 +0100
Subject: [PATCH] Tune what's considered a duplicate intersection point

---
 packages/element/src/collision.ts | 6 ++++--
 packages/math/src/point.ts        | 3 ++-
 2 files changed, 6 insertions(+), 3 deletions(-)

diff --git a/packages/element/src/collision.ts b/packages/element/src/collision.ts
index 891af7d3cc..14c9145a16 100644
--- a/packages/element/src/collision.ts
+++ b/packages/element/src/collision.ts
@@ -234,7 +234,8 @@ const intersectRectanguloidWithLineSegment = (
       )
       // Remove duplicates
       .filter(
-        (p, idx, points) => points.findIndex((d) => pointsEqual(p, d)) === idx,
+        (p, idx, points) =>
+          points.findIndex((d) => pointsEqual(p, d, 1e-3)) === idx,
       )
   );
 };
@@ -282,7 +283,8 @@ const intersectDiamondWithLineSegment = (
       )
       // Remove duplicates
       .filter(
-        (p, idx, points) => points.findIndex((d) => pointsEqual(p, d)) === idx,
+        (p, idx, points) =>
+          points.findIndex((d) => pointsEqual(p, d, 1e-3)) === idx,
       )
   );
 };
diff --git a/packages/math/src/point.ts b/packages/math/src/point.ts
index b6054a10a3..bedffbf037 100644
--- a/packages/math/src/point.ts
+++ b/packages/math/src/point.ts
@@ -91,9 +91,10 @@ export function isPoint(p: unknown): p is LocalPoint | GlobalPoint {
 export function pointsEqual<Point extends GlobalPoint | LocalPoint>(
   a: Point,
   b: Point,
+  precision = PRECISION,
 ): boolean {
   const abs = Math.abs;
-  return abs(a[0] - b[0]) < PRECISION && abs(a[1] - b[1]) < PRECISION;
+  return abs(a[0] - b[0]) < precision && abs(a[1] - b[1]) < precision;
 }
 
 /**