From f20f4670ef2e6078d6800a27fb71ec2a3c7f6b7d Mon Sep 17 00:00:00 2001
From: D8H <Davy.Helard@gmail.com>
Date: Tue, 21 Apr 2026 11:16:50 +0200
Subject: [PATCH] Fix particle emitter gravity length action when it was 0
 (#8520)

---
 Extensions/ParticleSystem/particleemitterobject.ts | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/Extensions/ParticleSystem/particleemitterobject.ts b/Extensions/ParticleSystem/particleemitterobject.ts
index cae8cca61d..2dba2d63a3 100644
--- a/Extensions/ParticleSystem/particleemitterobject.ts
+++ b/Extensions/ParticleSystem/particleemitterobject.ts
@@ -847,8 +847,13 @@ namespace gdjs {
       const oldLength = this.getParticleGravityLength();
       if (oldLength !== length) {
         this._gravityDirty = true;
-        this.gravityX *= length / oldLength;
-        this.gravityY *= length / oldLength;
+        if (oldLength === 0) {
+          this.gravityX = 0;
+          this.gravityY = length;
+        } else {
+          this.gravityX *= length / oldLength;
+          this.gravityY *= length / oldLength;
+        }
       }
     }