From 0371e7f7e86932b46a39c1139ebacfb4a2db8c0a Mon Sep 17 00:00:00 2001
From: Hanse-14 <johannes14.graf@gmail.com>
Date: Thu, 14 Dec 2023 17:16:29 +0100
Subject: [PATCH] Add: snake cannot move into opposite direction

---
 src/snake.c | 30 +++++++++++++++++++++++++++++-
 1 file changed, 29 insertions(+), 1 deletion(-)

diff --git a/src/snake.c b/src/snake.c
index cf4d1e8..9520aa7 100644
--- a/src/snake.c
+++ b/src/snake.c
@@ -62,7 +62,35 @@ void snakeMove()
 }
 
 void snakeSetDir(snakeDirection_t dir)
-{
+{   
+    // check, if snake should be move in opposite direction -> new direction stays old direction
+    switch(dir)
+    {
+        case DOWN:
+            if(game.snake.direction == UP)
+                return;
+            else    
+                break;
+
+        case UP:
+            if(game.snake.direction == DOWN)
+                return;
+            else    
+                break;
+
+        case LEFT:
+            if(game.snake.direction == RIGHT)
+                return;
+            else    
+                break;
+
+        case RIGHT:
+            if(game.snake.direction == LEFT)
+                return;
+            else    
+                break;
+
+    }
     game.snake.direction = dir;
     return;
 }