最近我一直在做一个我的小项目。 我有一个背景，我在其中产生了很多汽车。 我想让这些车沿着我定义自己的路径移动。当我打电话给我的移动方法时，我已经达到了我的一辆车移动到（0,0）位置的程度，而且，我不确定如何在路径上有一个平滑的动画，我不希望汽车突然出现在最后一个航路点立即定义。
这是我的代码：
import assets
import pygame
##this class spawns
class bus(pygame.sprite.Sprite):
def __init__(self):
super(bus,self).__init__()
self.image = pygame.Surface((assets.bus_width,assets.bus_height))
self.rect = self.image.get_rect()
def set_position(self,x,y):
self.rect.x = x
self.rect.y = y
def set_image(self, filename = None):
if filename != None:
self.image = pygame.image.load(filename).convert()
self.rect = self.image.get_rect()
def rotate(self,angle):
self.image = pygame.transform.rotate(self.image,angle)
self.rect = self.image.get_rect()
class car(pygame.sprite.Sprite):
def __init__(self):
super(car,self).__init__()
self.image = pygame.Surface((assets.car_width,assets.car_height))
self.rect = self.image.get_rect()
self.speed = 2
def set_position(self,x,y):
self.rect.x = x
self.rect.y = y
def get_x_position(self):
return self.rect.x
def get_y_position(self):
return self.rect.y
def set_image(self, filename = None):
if filename != None:
self.image = pygame.image.load(filename).convert()
self.rect = self.image.get_rect()
def rotate(self,angle):
self.image = pygame.transform.rotate(self.image,angle)
self.rect = self.image.get_rect()
#not sure what to do here
def move_position(self,x,y):
self.rect.x +=
self.rect.y +=
self.rect = self.image.get_rect()
class WayPoint:
def __init__(self, x, y):
self.x = x
self.y = y
def getX(self):
return self.x
def getY(self):
return self.y
class WayPointsList:
def __init__(self):
self.wayPoints = []
def add_wayPoint(self, x, y):
self.wayPoints.append(WayPoint(x,y))
def __len__(self):
return len(self.wayPoints)
def get_wayPoint(self, i):
return [self.wayPoints[i].getX(), self.wayPoints[i].getY()]
if __name__ == '__main__':
pygame.init()
window_size = window_width, window_height = assets.screen_width, assets.screen_height
window = pygame.display.set_mode(window_size, pygame.RESIZABLE)
pygame.display.set_caption(assets.caption)
window.fill(assets.white)
clock = pygame.time.Clock()
car_group = pygame.sprite.Group()
#mainloop
running = True
while running:
#loading background
bkg = pygame.image.load(assets.background)
#event handling
for event in pygame.event.get():
if event.type == pygame.QUIT:
running = False
elif event.type == pygame.KEYDOWN:
if event.key == pygame.K_1:
car110 = car()
car110.set_image(assets.furore)
car110.rotate(180)
car110.set_position(0,273)
car_group.add(car110)
elif event.key == pygame.K_2:
car109 = car()
car109.set_image(assets.hachura)
car109.rotate(180)
car109.set_position(0,306)
car_group.add(car109)
#i want to move this car along some waypoints I've defined in my head
#like so:
#lane = WayPointsList()
#lane.add_wayPoint(50, 250)
#lane.add_wayPoint(250, 350)
#after this i want to move my image along these waypoints I've defined
elif event.key == pygame.K_3:
car108=car()
car108.set_image(assets.jefferson)
car108.rotate(180)
car108.set_position(0,343)
car_group.add(car108)
elif event.key == pygame.K_4:
car107=car()
car107.set_image(assets.michelli)
car107.rotate(270)
car107.set_position(410,550)
car_group.add(car107)
elif event.key == pygame.K_5:
car106=car()
car106.set_image(assets.traceAM)
car106.rotate(270)
car106.set_position(460,550)
car_group.add(car106)
elif event.key == pygame.K_6:
car105=car()
car105.set_image(assets.traceAM)
car105.set_position(750,300)
car_group.add(car105)
elif event.key == pygame.K_7:
car104=car()
car104.set_image(assets.rumbler)
car104.set_position(750,265)
car_group.add(car104)
elif event.key == pygame.K_8:
car103=car()
car103.set_image(assets.rumbler)
car103.rotate(90)
car103.set_position(294,0)
car_group.add(car103)
elif event.key == pygame.K_9:
car102=car()
car102.set_image(assets.rumbler)
car102.rotate(90)
car102.set_position(337,0)
car_group.add(car102)
elif event.key == pygame.K_0:
car101=car()
car101.set_image(assets.rumbler)
car101.rotate(90)
car101.set_position(380,0)
car_group.add(car101)
elif event.key == pygame.K_b:
car201=bus()
car201.set_image(assets.bus)
car201.set_position(700,229)
car_group.add(car201)
elif event.key ==pygame.K_x:
car_group.remove(car101,car102,car103,car104,car105,car106,car107,car108,car109,car110,car201)
car_group.update()
window.fill(assets.white)
window.blit(bkg,(0,0))
car_group.draw(window)
clock.tick(assets.FPS)
pygame.display.update()
pygame.quit()
如果有人能给我一些指示或告诉我我能做些什么来解决它，我会非常感激！
答案 0 :(得分：3)
在move_position中不要使用
self.rect = self.image.get_rect()
因为image无法保持位置且始终为(x,y) == (0,0)
在课程中创建update()并在move_position()内运行update()，car_group.update()将在每个循环中执行它。
我将angle保存在self.angle中，以便我可以使用它向正确的方向移动
radians_angle = math.radians(self.angle)
self.rect.x -= self.speed * math.cos(radians_angle)
self.rect.y -= self.speed * math.sin(radians_angle)
示例无图像，因此每个人都可以运行它。
import pygame
import math
WHITE = (0,0,0)
##this class spawns
class bus(pygame.sprite.Sprite):
def __init__(self):
super(bus,self).__init__()
self.image = pygame.Surface((800, 600)).convert_alpha()
self.rect = self.image.get_rect()
self.angle = 0 # <-- default direction
def set_position(self,x,y):
self.rect.x = x
self.rect.y = y
def set_image(self, filename = None):
if filename != None:
self.image = pygame.Surface((20, 20)).convert_alpha()
self.image.fill((255,0,0))
self.rect = self.image.get_rect()
def rotate(self,angle):
self.angle = angle # <-- keep it to move it in correct direction
self.image = pygame.transform.rotate(self.image,angle).convert_alpha() # need alpha to correctly rotate
self.rect = self.image.get_rect()
class car(pygame.sprite.Sprite):
def __init__(self):
super(car,self).__init__()
self.image = pygame.Surface((20,20)).convert_alpha()
self.image.fill((255,0,0))
self.rect = self.image.get_rect()
self.speed = 2
self.angle = 0 # <-- default direction
def set_position(self,x,y):
self.rect.x = x
self.rect.y = y
def get_x_position(self):
return self.rect.x
def get_y_position(self):
return self.rect.y
def set_image(self, filename = None):
if filename != None:
self.image = pygame.Surface((20, 20)).convert_alpha() # need alpha to correctly rotate
self.image.fill((0,255,0))
self.rect = self.image.get_rect()
def rotate(self,angle):
self.angle = angle # <-- keep it to move it in correct direction
self.image = pygame.transform.rotate(self.image, angle).convert_alpha() # need alpha to correctly rotate
self.rect = self.image.get_rect()
#not sure what to do here
def move_position(self,x,y):
# use angle to calculate direction
radius_angle = math.radians(self.angle)
self.rect.x -= self.speed * math.cos(radius_angle)
self.rect.y -= self.speed * math.sin(radius_angle)
#print('move', self.angle, self.rect.x, self.rect.y)
#self.rect = self.image.get_rect() # <-- DON'T DO THIS
def update(self):
self.move_position(0,0)
class WayPoint:
def __init__(self, x, y):
self.x = x
self.y = y
def getX(self):
return self.x
def getY(self):
return self.y
class WayPointsList:
def __init__(self):
self.wayPoints = []
def add_wayPoint(self, x, y):
self.wayPoints.append(WayPoint(x,y))
def __len__(self):
return len(self.wayPoints)
def get_wayPoint(self, i):
return [self.wayPoints[i].getX(), self.wayPoints[i].getY()]
if __name__ == '__main__':
pygame.init()
window_size = window_width, window_height = 800, 600
window = pygame.display.set_mode(window_size, pygame.RESIZABLE)
window.fill(WHITE)
clock = pygame.time.Clock()
car_group = pygame.sprite.Group()
#mainloop
running = True
while running:
#loading background
bkg = pygame.Surface((800,600)).convert()
bkg.fill((0,0,255))
#event handling
for event in pygame.event.get():
if event.type == pygame.QUIT:
running = False
elif event.type == pygame.KEYDOWN:
if event.key == pygame.K_1:
car110 = car()
#car110.set_image(assets.furore)
car110.rotate(180-45)
car110.set_position(0,273)
car_group.add(car110)
elif event.key == pygame.K_2:
car109 = car()
#car109.set_image(assets.hachura)
car109.rotate(180)
car109.set_position(0,306)
car_group.add(car109)
#i want to move this car along some waypoints I've defined in my head
#like so:
#lane = WayPointsList()
#lane.add_wayPoint(50, 250)
#lane.add_wayPoint(250, 350)
#after this i want to move my image along these waypoints I've defined
elif event.key == pygame.K_3:
car108=car()
#car108.set_image(assets.jefferson)
car108.rotate(180)
car108.set_position(0,343)
car_group.add(car108)
elif event.key == pygame.K_4:
car107=car()
#car107.set_image(assets.michelli)
car107.rotate(270)
car107.set_position(410,550)
car_group.add(car107)
elif event.key == pygame.K_5:
car106=car()
#car106.set_image(assets.traceAM)
car106.rotate(270)
car106.set_position(460,550)
car_group.add(car106)
elif event.key == pygame.K_6:
car105=car()
#car105.set_image(assets.traceAM)
car105.set_position(750,300)
car_group.add(car105)
elif event.key == pygame.K_7:
car104=car()
#car104.set_image(assets.rumbler)
car104.set_position(750,265)
car_group.add(car104)
elif event.key == pygame.K_8:
car103=car()
#car103.set_image(assets.rumbler)
car103.rotate(90)
car103.set_position(294,0)
car_group.add(car103)
elif event.key == pygame.K_9:
car102=car()
#car102.set_image(assets.rumbler)
car102.rotate(90)
car102.set_position(337,0)
car_group.add(car102)
elif event.key == pygame.K_0:
car101=car()
#car101.set_image(assets.rumbler)
car101.rotate(90)
car101.set_position(380,0)
car_group.add(car101)
elif event.key == pygame.K_b:
car201=bus()
#car201.set_image(assets.bus)
car201.set_position(700,229)
car_group.add(car201)
elif event.key ==pygame.K_x:
car_group.remove(car101,car102,car103,car104,car105,car106,car107,car108,car109,car110,car201)
car_group.update()
window.fill(WHITE)
window.blit(bkg,(0,0))
car_group.draw(window)
clock.tick(25)
pygame.display.update()
pygame.quit()