From 1d8a11601d04a0502d1b1150baa8cf5e6e6be06d Mon Sep 17 00:00:00 2001
From: carnivoroussociety
 <38839485+carnivoroussociety@users.noreply.github.com>
Date: Tue, 15 Feb 2022 07:41:46 +1000
Subject: [PATCH] Fix ceiling panning angle

---
 source/games/blood/src/sectorfx.cpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/source/games/blood/src/sectorfx.cpp b/source/games/blood/src/sectorfx.cpp
index 34849058e..ce66a0d4d 100644
--- a/source/games/blood/src/sectorfx.cpp
+++ b/source/games/blood/src/sectorfx.cpp
@@ -300,9 +300,9 @@ void DoSectorPanning(void)
 				if (pSector->ceilingstat & CSTAT_SECTOR_ALIGN)
 					angle -= 512;
 				int xBits = tileWidth(nTile) >> int((pSector->ceilingstat & CSTAT_SECTOR_TEXHALF) != 0);
-				int px = MulScale(speed << 2, Cos(angle), 30) / xBits;
+				int px = MulScale(speed << 2, Cos(-angle), 30) / xBits;
 				int yBits = tileHeight(nTile) >> int((pSector->ceilingstat & CSTAT_SECTOR_TEXHALF) != 0);
-				int py = MulScale(speed << 2, Sin(angle), 30) / yBits;
+				int py = MulScale(speed << 2, Sin(-angle), 30) / yBits;
 				pSector->addceilingxpan(px * (1.f / 256));
 				pSector->addceilingypan(-py * (1.f / 256));
 			}