From 8c62a0d640c4e556db8018ac93cac5fb9578ff37 Mon Sep 17 00:00:00 2001
From: Sally Coolatta <tehrealsalt@gmail.com>
Date: Tue, 22 Mar 2022 05:53:21 -0400
Subject: [PATCH] Fix papersprites being rotated incorrectly in Software when
viewing them on the flipped side
---
src/r_things.c | 11 ++++++++++-
1 file changed, 10 insertions(+), 1 deletion(-)
diff --git a/src/r_things.c b/src/r_things.c
index 1179b9f4d..db4263a6a 100644
--- a/src/r_things.c
+++ b/src/r_things.c
@@ -1611,7 +1611,16 @@ static void R_ProjectSprite(mobj_t *thing)
if (thing->rollangle
&& !(splat && !(thing->renderflags & RF_NOSPLATROLLANGLE)))
{
- rollangle = R_GetRollAngle(thing->rollangle);
+ if (papersprite && ang >= ANGLE_180)
+ {
+ // Makes Software act much more sane like OpenGL
+ rollangle = R_GetRollAngle(InvAngle(thing->rollangle));
+ }
+ else
+ {
+ rollangle = R_GetRollAngle(thing->rollangle);
+ }
+
rotsprite = Patch_GetRotatedSprite(sprframe, (thing->frame & FF_FRAMEMASK), rot, flip, false, sprinfo, rollangle);
if (rotsprite != NULL)
--
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