我将制作一款自上而下的赛车游戏,并希望在按下左右键时使汽车旋转(我已经完成了这部分),精灵的旋转以度数存储在变量中。我想能够根据加速度使其朝着面对的方向移动。我可以自己解决加速度部分,只是需要找出确切的像素方向。有人可以给我一些简单的代码来帮助吗?
以下是相关类的内容:
以下是相关类的内容:
def __init__(self, groups):
super(Car, self).__init__(groups)
self.originalImage = pygame.image.load(os.path.join("Data", "Images", "Car.png")) #TODO Make dynamic
self.originalImage.set_colorkey((0,255,0))
self.image = self.originalImage.copy() # The variable that is changed whenever the car is rotated.
self.originalRect = self.originalImage.get_rect() # This rect is ONLY for width and height, the x and y NEVER change from 0!
self.rect = self.originalRect.copy() # This is the rect used to represent the actual rect of the image, it is used for the x and y of the image that is blitted.
self.velocity = 0 # Current velocity in pixels per second
self.acceleration = 1 # Pixels per second (Also applies as so called deceleration AKA friction)
self.topSpeed = 30 # Max speed in pixels per second
self.rotation = 0 # In degrees
self.turnRate = 5 # In degrees per second
self.moving = 0 # If 1: moving forward, if 0: stopping, if -1: moving backward
self.centerRect = None
def update(self, lastFrame):
if self.rotation >= 360: self.rotation = 0
elif self.rotation < 0: self.rotation += 360
if self.rotation > 0:
self.image = pygame.transform.rotate(self.originalImage.copy(), self.rotation)
self.rect.size = self.image.get_rect().size
self.center() # Attempt to center on the last used rect
if self.moving == 1:
self.velocity += self.acceleration #TODO make time based
if self.velocity > self.topSpeed: self.velocity = self.topSpeed # Cap the velocity