From bdbf94243f414f377c10a395357c07c7e9f94b72 Mon Sep 17 00:00:00 2001
From: Jiri Vlasak <hubacji1@fel.cvut.cz>
Date: Mon, 11 Mar 2019 16:40:24 +0100
Subject: [PATCH] Fix indexing for negatives

---
 incl/rrtbase.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/incl/rrtbase.h b/incl/rrtbase.h
index 98b4cee..5c46747 100644
--- a/incl/rrtbase.h
+++ b/incl/rrtbase.h
@@ -33,11 +33,11 @@ along with I am car. If not, see <http://www.gnu.org/licenses/>.
 #define IXSIZE 100
 #define IXSTEP (1.0 * ((VMAX) - (VMIN)) / IXSIZE)
 #define IXI(x) ({ __typeof__ (x) _x = (x); \
-                (int) floor(_x / IXSTEP); })
+                std::abs((int) floor(_x / IXSTEP)); })
 #define IYSIZE 100
 #define IYSTEP (1.0 * ((HMAX) - (HMIN)) / IYSIZE)
 #define IYI(y) ({ __typeof__ (y) _y = (y); \
-                (int) floor(_y / IYSTEP); })
+                std::abs((int) floor(_y / IYSTEP)); })
 
 class Cell {
         private:
-- 
2.39.2