From 6c35be3177630da4fc8f902f53ec5d8b0e9b08c1 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Miloslav=20=C4=8C=C3=AD=C5=BE?= <tastyfish@seznam.cz>
Date: Thu, 13 Sep 2018 11:07:34 +0200
Subject: [PATCH] Fix texturing

---
 raycastlib.h | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/raycastlib.h b/raycastlib.h
index 6056c8a..0268d0f 100644
--- a/raycastlib.h
+++ b/raycastlib.h
@@ -863,8 +863,9 @@ for (uint_maybe32_t j = 0; j <= hitCount; ++j)
     #define drawVertical(pref,l1,l2,comp,inc)\
       {\
         limit = clamp(pref##Z2Screen,l1,l2);\
-        Unit wallLength = pref##Z2Screen - pref##Z1Screen;\
-        Unit wallPosition = absVal(pref##Z1Screen - pref##PosY);\
+        Unit wallLength = pref##Z2Screen - pref##Z1Screen - 1;\
+        wallLength = wallLength != 0 ? wallLength : 1;\
+        Unit wallPosition = absVal(pref##Z1Screen - pref##PosY) + 1;\
         for (i = pref##PosY inc 1; i comp##= limit; inc##inc i)\
         {\
           p.position.y = i;\