From 8ffa4b3d8166aeafd70e96f9d2489d57cd443834 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Miloslav=20=C4=8C=C3=AD=C5=BE?= <tastyfish@seznam.cz>
Date: Tue, 11 Sep 2018 13:33:06 +0200
Subject: [PATCH] Bug workaround

---
 raycastlib.h | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/raycastlib.h b/raycastlib.h
index 8ce6ee1..5543032 100644
--- a/raycastlib.h
+++ b/raycastlib.h
@@ -804,6 +804,9 @@ void _columnFunction(HitResult *hits, uint16_t hitCount, uint16_t x, Ray ray)
     if (zTop <= zBottomCeil)
       zBottomCeil = zTop; // walls on ceiling and floor met
 
+    if (z1Screen == 0) // TMP: nasty shear bug workaround
+      z1Screen = -1;
+
     // draw floor until wall
 
     p.isWall = 0;