基本上,我创造了质量,给了它们一些速度和动量,我试图利用重力使它们相互环绕(围绕它们的质量中心)运行。

from visual import *

earth = sphere(radius = 100000000)
newPlanet = sphere(pos = (3.84403*10**8, 0, 0), radius = 10000000)

earth.velocity = vector(0, 100, 0)
newPlanet.velocity = vector(0, 100, 0)

earth.mass = 2*10**30
newPlanet.mass = 1*10**30

earth.p = vector(0, earth.mass*earth.velocity, 0)
newPlanet.p = vector(0, newPlanet.mass*newPlanet.velocity, 0)

dt = 1000
r = newPlanet.pos.x
T = 1.296*10**6
G = 6.673*10**-11

while 1:
    Fnet = G*((earth.mass*newPlanet.mass)/r**2)

    earth.p += Fnet*dt
    newPlanet.p += Fnet*dt

    earth.velocity += (earth.p/earth.mass)*dt
    newPlanet.velocity += (newPlanet.p/newPlanet.mass)*dt

    earth.pos += earth.velocity*dt
    newPlanet.pos += newPlanet.velocity*dt

    t += 1

    rate(100)

这是我得到的错误:
Traceback (most recent call last):
  File "Untitled", line 12
    earth.p = vector(0, earth.mass*earth.velocity, 0)
Boost.Python.ArgumentError: Python argument types in
    vector.__init__(vector, int, vector, int)
did not match C++ signature:
    __init__(struct _object *, class cvisual::vector)
    __init__(struct _object *)
    __init__(struct _object *, double)
    __init__(struct _object *, double, double)
    __init__(struct _object *, double, double, double)

最佳答案

vector使用三个数字作为参数,如vpython文档所示here
在你的作业中,earth.p = vector(0, earth.mass*earth.velocity, 0)是一个向量,而不是一个预期的数字。
因此出现了一条错误消息,你确定你不是故意的
earth.mass*earth.velocity
或者改为typeof(earth.mass*earth.velocity)

关于python - 试图使两个质量彼此轨道……得到奇怪的错误,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/9346363/

10-09 20:21