Fix serious problems with 'arc anoid'

Summary: https://github.com/facebook/arcanist/issues/48

Test Plan: hmm

Reviewers: alanh, tuomaspelkonen

Reviewed By: tuomaspelkonen

CC: aran

Differential Revision: https://secure.phabricator.com/D3244

scripts/breakout.py

@@ -15,7 +15,7 @@ class Wall:
 class Block:
     killed = 0
     total = 0
-    
+
     def __init__(self, x, y, w, h, c):
         self.x = x
         self.y = y
@@ -27,7 +27,7 @@ class Block:
             for j in range(self.y, self.y + self.h):
                 grid[j + 1][i + 1] = self
         Block.total += 1
-    
+
     def collide(self, ball):
         self.alive = False
         for i in range(self.x, self.x + self.w):
@@ -35,7 +35,7 @@ class Block:
                 grid[j + 1][i + 1] = None
         Block.killed += 1
         return False
-    
+
     def tick(self, win):
         if self.alive:
             for i in range(self.x, self.x + self.w):
@@ -46,24 +46,24 @@ class Block:
 class Ball:
     alive = False
     killed = 0
-    
+
     def __init__(self, x, y, vx, vy):
         self.x = x
         self.y = y
         self.vx = vx
         self.vy = vy
         Ball.alive = True
-    
+
     def collide(self, ball):
         return True
-    
+
     def encounter(self, dx, dy):
         ent = grid[self.y + dy + 1][self.x + dx + 1]
         if ent and not ent.collide(self):
             self.vx -= 2 * dx
             self.vy -= 2 * dy
         return ent
-    
+
     def tick(self, win):
         while self.y < ship.y:
             if self.encounter((self.vx + self.vy) / 2, (self.vy - self.vx) / 2):
@@ -81,7 +81,7 @@ class Ball:
             Ball.alive = False
             Ball.killed += 1
         return Ball.alive
-        
+
 class Ship:
     def __init__(self, x, y):
         self.x = x
@@ -90,14 +90,14 @@ class Ship:
         self.v = 4
         self.last = 1
         self.update()
-    
+
     def update(self):
         grid[self.y + 1] = (
             [ None ] * (self.x - self.hw + 1) +
             [ self ] * (self.hw * 2 + 1) +
             [ None ] * (width - self.x - self.hw)
         )
-    
+
     def collide(self, ball):
         ball.vy = -1
         if ball.x > self.x + self.hw / 2:
@@ -105,7 +105,7 @@ class Ship:
         elif ball.x < self.x - self.hw / 2:
             ball.vx = -1
         return True
-    
+
     def shift(self, i):
         self.last = i
         self.x += self.v * i
@@ -114,11 +114,11 @@ class Ship:
         elif self.x + self.hw >= width:
             self.x = width - self.hw - 1
         self.update()
-    
+
     def spawn(self):
         if not Ball.alive:
             entities.append(Ball(self.x, self.y - 1, self.last, -1))
-    
+
     def tick(self, win):
         if not Ball.alive:
             win.addch(self.y - 1, self.x, 'O')
@@ -127,21 +127,26 @@ class Ship:
             win.addch(curses.ACS_HLINE)
         win.addch(curses.ACS_RTEE)
         return True
-    
+
 def main(stdscr):
     global height, width, ship
-    
+
     for i in range(1, 8):
         curses.init_pair(i, i, 0)
     curses.curs_set(0)
     curses.raw()
+
     height, width = stdscr.getmaxyx()
+
+    if height < 15 or width < 30:
+        return 1
+
     status = curses.newwin(1, width, 0, 0)
     height -= 1
     game = curses.newwin(height, width, 1, 0)
     game.nodelay(1)
     game.keypad(1)
-    
+
     grid[:] = [ [ None for x in range(width + 2) ] for y in range(height + 2) ]
     wall = Wall()
     for x in range(width + 2):
@@ -150,13 +155,13 @@ def main(stdscr):
         grid[y][0] = grid[y][-1] = wall
     ship = Ship(width / 2, height - 5)
     entities.append(ship)
-    
+
     colors = [ 1, 3, 2, 6, 4, 5 ]
     h = height / 10
     for x in range(1, width / 7 - 1):
         for y in range(1, 7):
             entities.append(Block(x * 7, y * h + x / 2 % 2, 7, h, colors[y - 1]))
-    
+
     while True:
         while select.select([ sys.stdin ], [], [], 0)[0]:
             key = game.getch()
@@ -168,11 +173,11 @@ def main(stdscr):
                 ship.spawn()
             elif key == 0x1b or key == 3 or key == ord('q') or key == ord('Q'):
                 return
-        
+
         game.resize(height, width)
         game.erase()
         entities[:] = [ ent for ent in entities if ent.tick(game) ]
-        
+
         status.hline(0, 0, curses.ACS_HLINE, width)
         status.addch(0, 2, curses.ACS_RTEE)
         status.addstr(' SCORE: ', curses.A_BOLD | curses.color_pair(4))
@@ -181,7 +186,7 @@ def main(stdscr):
         status.addstr(' DEATHS: ', curses.A_BOLD | curses.color_pair(4))
         status.addstr('%s ' % Ball.killed, curses.A_BOLD)
         status.addch(curses.ACS_LTEE)
-        
+
         if Block.killed == Block.total:
             message = ' A WINNER IS YOU!! '
             i = int(time.time() / 0.8)
@@ -192,11 +197,16 @@ def main(stdscr):
                                curses.A_BOLD | curses.color_pair(colors[y]))
             game.addstr(height / 2, (width - len(message)) / 2, message,
                            curses.A_BOLD | curses.color_pair(7))
-        
+
         game.refresh()
         status.refresh()
         time.sleep(0.05)
 
-curses.wrapper(main)
+res = curses.wrapper(main)
-print ('You destroyed %s blocks out of %s with %s deaths.' %
+if res == 1:
-    (Block.killed, Block.total, Ball.killed))
+    print ("Your computer is not powerful enough to run 'arc anoid'. "
+        "It must support at least 30 columns and 15 rows of next-gen "
+        "full-color 3D graphics.")
+else:
+    print ('You destroyed %s blocks out of %s with %s deaths.' %
+        (Block.killed, Block.total, Ball.killed))