From bcebeadedc639e51cd5657e1149f4400d0270a40 Mon Sep 17 00:00:00 2001
From: Christoph Oelckers <c.oelckers@zdoom.fake>
Date: Sat, 9 Apr 2016 21:44:09 +0200
Subject: [PATCH] - fixed: ACS's GetActorPitch needs to convert to a signed
 angle.

---
 src/p_acs.cpp | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/p_acs.cpp b/src/p_acs.cpp
index 186e9c3d4e..bdc13357e7 100644
--- a/src/p_acs.cpp
+++ b/src/p_acs.cpp
@@ -178,6 +178,11 @@ inline int AngleToACS(DAngle ang)
 	return ang.BAMs() >> 16;
 }
 
+inline int PitchToACS(DAngle ang)
+{
+	return int(ang.Normalized180().Degrees * (65536. / 360));
+}
+
 struct CallReturn
 {
 	CallReturn(int pc, ScriptFunction *func, FBehavior *module, SDWORD *locals, ACSLocalArrays *arrays, bool discard, unsigned int runaway)
@@ -8751,7 +8756,7 @@ scriptwait:
 		case PCD_GETACTORPITCH:
 			{
 				AActor *actor = SingleActorFromTID(STACK(1), activator);
-				STACK(1) = actor == NULL ? 0 : AngleToACS(actor->Angles.Pitch);
+				STACK(1) = actor == NULL ? 0 : PitchToACS(actor->Angles.Pitch);
 			}
 			break;