From 3c57b9d94594ec1ab0b22bc989438ae819458f3f Mon Sep 17 00:00:00 2001
From: Regalis <regalis@undertowgames.com>
Date: Mon, 14 Nov 2016 18:16:30 +0200
Subject: [PATCH] Fixed particle velocity being set to { NaN, NaN } if drag is
 applied when velocity is almost zero

---
 Subsurface/Source/Particles/Particle.cs | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/Subsurface/Source/Particles/Particle.cs b/Subsurface/Source/Particles/Particle.cs
index d2c65e0f8..9ac4d7b0c 100644
--- a/Subsurface/Source/Particles/Particle.cs
+++ b/Subsurface/Source/Particles/Particle.cs
@@ -226,9 +226,9 @@ namespace Barotrauma.Particles
 
         private void ApplyDrag(float dragCoefficient, float deltaTime)
         {
-            if (velocity == Vector2.Zero) return;
-
+            if (Math.Abs(velocity.X) < 0.0001f && Math.Abs(velocity.Y) < 0.0001f) return;
             float speed = velocity.Length();
+
             velocity -= (velocity / speed) * Math.Min(speed * speed * prefab.WaterDrag * deltaTime, 1.0f);
         }