def grow(self):
last_element = len(self.stack) - 1
self.stack[last_element].direction = self.stack[last_element].direction
if (self.stack[last_element].direction == Constants.KEY["UP"]):
newSegment = Segment(
self.stack[last_element].x,
self.stack[last_element].y - Constants.SNAKE_SIZE)
blackBox = Segment(newSegment.x,
newSegment.y - Constants.SEPARATION)
elif (self.stack[last_element].direction == Constants.KEY["DOWN"]):
newSegment = Segment(
self.stack[last_element].x,
self.stack[last_element].y + Constants.SNAKE_SIZE)
blackBox = Segment(newSegment.x,
newSegment.y + Constants.SEPARATION)
elif (self.stack[last_element].direction == Constants.KEY["LEFT"]):
newSegment = Segment(
self.stack[last_element].x - Constants.SNAKE_SIZE,
self.stack[last_element].y)
blackBox = Segment(newSegment.x - Constants.SEPARATION,
newSegment.y)
elif (self.stack[last_element].direction == Constants.KEY["RIGHT"]):
newSegment = Segment(
self.stack[last_element].x + Constants.SNAKE_SIZE,
self.stack[last_element].y)
blackBox = Segment(newSegment.x + Constants.SEPARATION,
newSegment.y)
blackBox.color = "NULL"
self.stack.append(newSegment)
self.stack.append(blackBox)
def __init__(self, x, y):
self.x = x
self.y = y
self.direction = Constants.KEY["UP"]
self.stack = []
self.stack.append(self)
blackBox = Segment(self.x, self.y + Constants.SEPARATION)
blackBox.direction = Constants.KEY["UP"]
blackBox.color = "NULL"
self.stack.append(blackBox)
