From ffb5bb57f80db3fb30e8cae92dc15df043deb629 Mon Sep 17 00:00:00 2001
From: Yamagi Burmeister <yamagi@yamagi.org>
Date: Sat, 15 Jun 2019 17:45:05 +0200
Subject: [PATCH] Push entitie slightly away from non horizontal surfaces.

Otherwise the entities origin might be in the surface, which causes it
to be rendered in full black.
---
 src/g_phys.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/src/g_phys.c b/src/g_phys.c
index fecf28b..b3be126 100644
--- a/src/g_phys.c
+++ b/src/g_phys.c
@@ -530,6 +530,14 @@ retry:
 	VectorCopy(trace.endpos, ent->s.origin);
 	gi.linkentity(ent);
 
+	/* Push slightly away from non-horizontal surfaces,
+	   prevent origin stuck in the plane which causes
+	   the entity to be rendered in full black. */
+	if (trace.plane.type != 2)
+	{
+		VectorAdd(ent->s.origin, trace.plane.normal, ent->s.origin);
+	}
+
 	if (trace.fraction != 1.0)
 	{
 		SV_Impact(ent, &trace);