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在kivy乒乓教程中有我在我的電腦上運行的完整代碼，它的工作原理絕對精細，但如果在槳的邊緣擊球表現出瘋狂的運動。我不確定發生了什麼。我試着多次觀察它，我認爲這個球在槳內碰撞了很多次，所以速度不斷增加，這是轉動引起的隨機運動。但是我怎麼能使它工作？我試圖改變時鐘功能的時間，但沒有結果。假設有碰撞檢查方法，但是我無法做到這一點。任何幫助？擊球結束時槳顯示隨機運動
代碼（我不附加.kv文件我不認爲這裏需要）：
from kivy.app import App
from kivy.uix.widget import Widget
from kivy.properties import NumericProperty, ReferenceListProperty,\
ObjectProperty
from kivy.vector import Vector
from kivy.clock import Clock
class PongPaddle(Widget):
score = NumericProperty(0)
orientation = ObjectProperty([0, 0])
def bounce_ball(self, ball):
if self.collide_widget(ball) :
vx, vy = ball.velocity
offset = (ball.center_y - self.center_y)/(self.height/2)
bounced = Vector(-1 * vx, vy)
vel = bounced * 1.1
ball.velocity = vel.x, vel.y + offset
class PongBall(Widget):
velocity_x = NumericProperty(0)
velocity_y = NumericProperty(0)
velocity = ReferenceListProperty(velocity_x, velocity_y)
def move(self):
self.pos = Vector(*self.velocity) + self.pos
class PongGame(Widget):
ball = ObjectProperty(None)
player1 = ObjectProperty(None)
player2 = ObjectProperty(None)
def serve_ball(self, vel=(4, 0)):
self.ball.center = self.center
self.ball.velocity = vel
def update(self, dt):
self.ball.move()
#bounce of paddles
self.player1.bounce_ball(self.ball)
self.player2.bounce_ball(self.ball)
#bounce ball off bottom or top
if (self.ball.y < self.y) or (self.ball.top > self.top):
self.ball.velocity_y *= -1
#went of to a side to score point?
if self.ball.x < self.x:
self.player2.score += 1
self.serve_ball(vel=(4, 0))
if self.ball.x > self.width:
self.player1.score += 1
self.serve_ball(vel=(-4, 0))
def on_touch_move(self, touch):
if touch.x < self.width/3:
self.player1.center_y = touch.y
if touch.x > self.width - self.width/3:
self.player2.center_y = touch.y
class PongApp(App):
def build(self):
game = PongGame()
game.serve_ball()
Clock.schedule_interval(game.update, 1.0/60.0)
return game
if __name__ == '__main__':
PongApp().run()