벽돌 부시기) 만들기 : bat

구체 클래스를 작성하겠다.

이미지로 보는게 좋아서 이미지 파일과 같이..

(잘 안보여서 pdf도 같이 첨부)

파이썬 앱.pdf

	# This is the Ball class originally created for MyPong.
	# This class defines a ball that rebounds off the sides of a play area.
	import random
	class Ball:
	#### constructor
	def __init__(self, table, width=14, height=14, colour="red", x_speed=6, y_speed=4, x_start=0, y_start=0):
	self.width = width
	self.height = height
	self.x_posn = x_start
	self.y_posn = y_start
	self.colour = colour
	self.x_start = x_start
	self.y_start = y_start
	self.x_speed = x_speed
	self.y_speed = y_speed
	self.table = table
	self.circle = self.table.draw_oval(self)
	#### methods
	def start_position(self):
	self.x_posn = self.x_start
	self.y_posn = self.y_start
	def start_ball(self, x_speed, y_speed):
	self.x_speed = -x_speed if random.randint(0,1) else x_speed
	self.y_speed = -y_speed if random.randint(0,1) else y_speed
	self.start_position()
	def move_next(self):
	self.x_posn = self.x_posn + self.x_speed
	self.y_posn = self.y_posn + self.y_speed
	# if the ball hits the left wall:
	#print("first", self.x_posn, self.y_posn);
	if(self.x_posn <= 3):
	self.x_posn = 3
	self.x_speed = -self.x_speed
	#print("hits the left wall", self.x_posn, self.x_speed);
	# if it hits right wall:
	if(self.x_posn >= (self.table.width - (self.width - 3))):
	self.x_posn = (self.table.width - (self.width - 3))
	self.x_speed = -self.x_speed
	#print("hits the right wall", self.x_posn, self.x_speed, self.table.width, self.width);
	# if the ball hits the top wall:
	if(self.y_posn <= 3):
	self.y_posn = 3
	self.y_speed = -self.y_speed
	#print("hits the left wall", self.y_posn, self.y_speed);
	# if it hits bottom wall:
	if(self.y_posn >= (self.table.height - (self.height - 3))):
	self.y_posn = (self.table.height - (self.height - 3))
	self.y_speed = -self.y_speed
	#print("hits the right wall", self.y_posn, self.y_speed, self.table.height, self.height);
	# finally move the circle:
	x1 = self.x_posn
	x2 = self.x_posn+self.width
	y1 = self.y_posn
	y2 = self.y_posn+self.height
	#print("last", x1, x2, y1, y2)
	self.table.move_item(self.circle, x1, y1, x2, y2)
	def stop_ball(self):
	self.x_speed = 0
	self.y_speed = 0

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