From 071347d7fbdfff87e521ab39409902d73f3efdde Mon Sep 17 00:00:00 2001
From: Ijon <segfaultsamurai@gmail.com>
Date: Wed, 26 Dec 2018 18:19:50 -0600
Subject: [PATCH] NOFRICTION now applies to Z friction when flying or swimming

---
 src/p_mobj.cpp | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/src/p_mobj.cpp b/src/p_mobj.cpp
index 40ab761a1..98f880365 100644
--- a/src/p_mobj.cpp
+++ b/src/p_mobj.cpp
@@ -2530,9 +2530,13 @@ void P_ZMovement (AActor *mo, double oldfloorz)
 		{
 			mo->AddZ(DAngle(360 / 80.f * level.maptime).Sin() / 8);
 		}
-		mo->Vel.Z *= FRICTION_FLY;
+
+		if (!(mo->flags8 & MF8_NOFRICTION))
+		{
+			mo->Vel.Z *= FRICTION_FLY;
+		}
 	}
-	if (mo->waterlevel && !(mo->flags & MF_NOGRAVITY))
+	if (mo->waterlevel && !(mo->flags & MF_NOGRAVITY) && !(mo->flags8 & MF8_NOFRICTION))
 	{
 		double friction = -1;