Question

我想在显示器上为我的Pygame移动一些精灵。它是一条给定的路线，我想用向量移动它们。所以我得到了我的路线的位置，所以我得到了幅度和标题。你可以看到公式以及我想如何改变spirts的方式（使用＆＃34; if＆＃34;）。我把矢量放在元组中，我认为这不正确。我收到错误

TypeError：不能将序列乘以类型＆＃39; float＆＃39;的非int。第51行

我认为这是我多元化的方式。但我希望你能理解我的想法，你可以帮助我

clock = pygame.time.Clock()

speed = 25.
position = (30.0,50.0)
magnitude = [509, 141, 128, 409, 293, 330, 251, 532]
heading = [(0.7,0.73),(0.71,0.71),(0.78,0.63),(-0.52,0.65),(0.97,0.24),(0.58,-0.82),(-0.88,-0.48),(0.08,-0.99)]





while True:

for event in pygame.event.get():
    if event.type == QUIT:
        exit()

screen.blit(background, (0.0,0.0))
screen.blit(x1, position)
screen.blit(x2, (300,30))
screen.blit(x3, (500,30))
screen.blit(x4,(800,30))

time_passed = clock.tick()
time_passed_seconds = time_passed / 1000.0



route = time_passed_seconds * speed
position += heading[0] * route

if route >= magnitude[0]:
    route = 0
    route1 = time_passed_seconds * speed
    position += heading[1] * route1 
    if route1 >= magnitude[1]:
        route2 = time_passed_seconds * speed
        position += heading[2] *route2
        if route2 >= magnitude[2]:
            route3 = time_passed_seconds * speed
            position += heading[3] * route3
            if route3 >= magnitude[3]:
                route4 = time_passed_seconds * speed
                position += heading[4] * route4

Answer 1

您不想使用元组，因为您已经看到元组不能简单地乘以标量。（参见Multiplying a tuple by a scalar）

有一些解决方法，但最简单的解决方案是使用numpy，它支持您尝试做的数学运算。只需将矢量建模为numpy.array即可。然后你可以用这种方式进行计算：

import numpy

clock = pygame.time.Clock()

speed = 25.
position = numpy.array((30.0,50.0))
magnitude = [509, 141, 128, 409, 293, 330, 251, 532]
heading = numpy.array([(0.7,0.73),(0.71,0.71),(0.78,0.63),(-0.52,0.65),(0.97,0.24),(0.58,-0.82),(-0.88,-0.48),(0.08,-0.99)])

route = time_passed_seconds * speed
position += heading[0] * route

我还假设你在最后一行意味着heading[0]，因为添加整个列表似乎没有意义。

通过向量移动精灵

1 个答案: