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| # juggling_balls.py | |
| import random | |
| import turtle | |
| class Ball(turtle.Turtle): | |
| MAX_VELOCITY = 5 | |
| GRAVITY = 0.07 | |
| BAT_VELOCITY_CHANGE = 8 | |
| def __init__(self, width, height): | |
| super().__init__() | |
| self.width = width | |
| self.height = height | |
| self.shape("circle") | |
| self.color( | |
| random.random(), | |
| random.random(), | |
| random.random(), | |
| ) | |
| self.penup() | |
| self.setposition( | |
| random.randint(-self.width // 2, self.width // 2), | |
| random.randint(-self.height // 2, self.height // 2), | |
| ) | |
| self.setheading(90) | |
| self.velocity = random.randint(1, self.MAX_VELOCITY) | |
| def move(self): | |
| self.forward(self.velocity) | |
| self.fall() | |
| def fall(self): | |
| self.velocity -= self.GRAVITY | |
| def is_out_of_bounds(self): | |
| if self.ycor() < -self.height // 2: | |
| self.hideturtle() | |
| return True | |
| return False | |
| def bat_up(self): | |
| self.velocity += self.BAT_VELOCITY_CHANGE |
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