From c427ef90fa1e0c662730943e749bbeda2ed42894 Mon Sep 17 00:00:00 2001
From: NepDisk <nepdisk@noreply.codeberg.org>
Date: Wed, 24 Sep 2025 09:53:34 -0400
Subject: [PATCH] Fix gravfix (fixes #124)

---
 src/p_mobj.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/p_mobj.c b/src/p_mobj.c
index a7240aa79..396d99ea3 100644
--- a/src/p_mobj.c
+++ b/src/p_mobj.c
@@ -1160,6 +1160,13 @@ fixed_t P_GetMobjGravity(mobj_t *mo)
 
 	if (mo->player)
 	{
+		// MF2_OBJECTFLIP is relative -- flips sector reverse gravity back to normal
+		if (mo->flags2 & MF2_OBJECTFLIP)
+		{
+			gravityadd = -gravityadd;
+			mo->eflags ^= MFE_VERTICALFLIP;
+		}
+
 		if (wasflip == !(mo->eflags & MFE_VERTICALFLIP)) // note!! == ! is not equivalent to != here - turns numeric into bool this way
 			P_PlayerFlip(mo);