From 7573f0f09de47dd3015479fd5ededc23d9b0b216 Mon Sep 17 00:00:00 2001
From: helixhorned <helixhorned@1a8010ca-5511-0410-912e-c29ae57300e0>
Date: Wed, 19 Mar 2014 19:53:12 +0000
Subject: [PATCH] engine.c: check (non-)clipping over a floor curb of an upper
 TROR neighbor.

git-svn-id: https://svn.eduke32.com/eduke32@4383 1a8010ca-5511-0410-912e-c29ae57300e0
---
 polymer/eduke32/build/src/engine.c | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/polymer/eduke32/build/src/engine.c b/polymer/eduke32/build/src/engine.c
index 7f3bb30ec..6bdf4c7df 100644
--- a/polymer/eduke32/build/src/engine.c
+++ b/polymer/eduke32/build/src/engine.c
@@ -13471,7 +13471,24 @@ int32_t clipmove(vec3_t *pos, int16_t *sectnum,
 #endif
             if (wal->nextsector < 0 || (wal->cstat&dawalclipmask))
             {
+#ifdef YAX_ENABLE
+                int16_t cb = yax_getbunch(dasect, YAX_CEILING);
+
                 clipyou = 1;
+
+                if (cb >= 0 && (sec->ceilingstat & yax_waltosecmask(dawalclipmask)) == 0)
+                {
+                    int32_t ynw = yax_getnextwall(j, YAX_CEILING);
+
+                    if (ynw >= 0 && wall[ynw].nextsector >= 0 && (wall[ynw].cstat & dawalclipmask) == 0)
+                    {
+                        clipmove_tweak_pos(pos, gx,gy, x1,y1, x2,y2, &dax,&day);
+                        clipyou = check_floor_curb(dasect, wall[ynw].nextsector, flordist, pos->z, dax, day);
+                    }
+                }
+#else
+                clipyou = 1;
+#endif
             }
             else if (editstatus == 0)
             {