Merge pull request patrickloeber#3 from ChrisIdema/develop

Removed magic numbers and changed initial positions of snake

Author: patrickloeber

snake-game/snake.py

@@ -1,18 +1,29 @@
 import curses 
 from random import randint
 
+#constants
+
+WINDOW_WIDTH = 60  # number of columns of window box 
+WINDOW_HEIGHT = 20 # number of rows of window box 
+'''
+Number of blocks in window per line = WINDOW_WIDTH -2. 
+Block x index ranges from 1 to WINDOW_WIDTH -2.
+Number of blocks in window per column = WINDOW_HEIGHT -2. 
+Block y index ranges from 1 to WINDOW_HEIGHT -2.
+'''
+
 # setup window
 curses.initscr()
-win = curses.newwin(20, 60, 0, 0) # y,x
+win = curses.newwin(WINDOW_HEIGHT, WINDOW_WIDTH, 0, 0) # rows, columns
 win.keypad(1)
 curses.noecho()
 curses.curs_set(0)
 win.border(0)
 win.nodelay(1) # -1
 
 # snake and food
-snake = [(4, 10), (4, 9), (4, 8)]
-food = (10, 20)
+snake = [(4, 4), (4, 3), (4, 2)]
+food = (6, 6)
 
 win.addch(food[0], food[1], '#')
 # game logic
@@ -48,9 +59,9 @@
 
     # check if we hit the border
     if y == 0: break
-    if y == 19: break
+    if y == WINDOW_HEIGHT-1: break
     if x == 0: break
-    if x == 59: break
+    if x == WINDOW_WIDTH -1: break
 
     # if snake runs over itself
     if snake[0] in snake[1:]: break
@@ -60,7 +71,7 @@
         score += 1
         food = ()
         while food == ():
-            food = (randint(1,18), randint(1,58))
+            food = (randint(1,WINDOW_HEIGHT-2), randint(1,WINDOW_WIDTH -2))
             if food in snake:
                 food = ()
         win.addch(food[0], food[1], '#')