From fcc4e94655c609bc97c97cad4c63d51660e86d9d Mon Sep 17 00:00:00 2001
From: smallmodel <15067410+smallmodel@users.noreply.github.com>
Date: Sun, 10 Nov 2024 18:34:33 +0100
Subject: [PATCH] Continue traveling if the bullet trace goes backwards

---
 code/fgame/weaputils.cpp | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/code/fgame/weaputils.cpp b/code/fgame/weaputils.cpp
index e5d23952..98f00421 100644
--- a/code/fgame/weaputils.cpp
+++ b/code/fgame/weaputils.cpp
@@ -2207,6 +2207,8 @@ float BulletAttack(
             oldfrac = -1;
 
             while (trace.fraction < 1.0f) {
+                Vector vDeltaTrace;
+
                 trace = G_Trace(
                     vTraceStart, vec_zero, vec_zero, vTraceEnd, newowner, MASK_SHOT_TRIG, false, "BulletAttack", true
                 );
@@ -2452,6 +2454,13 @@ float BulletAttack(
                 } else {
                     trace.fraction = 1;
                 }
+
+                vDeltaTrace = vTmpEnd - vTraceStart;
+                if (!bBulletDone && DotProduct(vDeltaTrace, vDir) < 0) {
+                    // Fixed in OPM
+                    //  This can happen in rare circumstances if the trace is out of the world limit
+                    break;
+                }
             }
         }