From 549569e75b4c072a54d9ab39926521c6cc198895 Mon Sep 17 00:00:00 2001
From: MascaraSnake <jonassauer27@gmail.com>
Date: Wed, 5 Jan 2022 10:08:49 +0100
Subject: [PATCH] Fix offset calculation for segs that represent linedef
backsides
---
src/p_setup.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/src/p_setup.c b/src/p_setup.c
index 7f9674e4e0..de91f4674d 100644
--- a/src/p_setup.c
+++ b/src/p_setup.c
@@ -2494,7 +2494,10 @@ static boolean P_LoadExtendedSubsectorsAndSegs(UINT8 **data, nodetype_t nodetype
P_InitializeSeg(seg);
seg->angle = R_PointToAngle2(v1->x, v1->y, v2->x, v2->y);
if (seg->linedef)
- segs[i].offset = FixedHypot(v1->x - seg->linedef->v1->x, v1->y - seg->linedef->v1->y);
+ {
+ vertex_t *v = (seg->side == 1) ? seg->linedef->v2 : seg->linedef->v1;
+ segs[i].offset = FixedHypot(v1->x - v->x, v1->y - v->y);
+ }
seg->length = P_SegLength(seg);
#ifdef HWRENDER
seg->flength = (rendermode == render_opengl) ? P_SegLengthFloat(seg) : 0;
--
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