在Visual Python中模擬軌道時遇到了問題

Question

這是我寫在VPython中的代碼，到目前爲止，我是Vpython的新手，我不是那種在python中經驗豐富的，所以請給我一些鬆懈，我得到的錯誤是：

Traceback (most recent call last): File "C:\Users\Makka Pakka\Documents\Planetary Orbits.py", line 28 
    SUVAT(EarthInitialV,Distance) File "C:\Users\Makka Pakka\Documents\Planetary Orbits.py", line 4, in SUVAT 
    EarthFinalV.x = sqrt((A.x) + 2*Acceleration*(B.x)) TypeError: unsupported operand type(s) for +: 'float' and 'vector' 

from visual import * 

def SUVAT(A,B): 
     EarthFinalV.x = sqrt((A.x) + 2*Acceleration*(B.x)) 
     EarthFinalV.y = sqrt((A.y) + 2*Acceleration*(B.y)) 
     EarthFinalV.z = sqrt((A.z) + 2*Acceleration*(B.z)) 

GravitationalConstant = 10 

Sun = sphere(pos=(0,0,0), radius=10, color=color.red, 
      make_trail=True) 

Earth = sphere(pos=(50,0,0), radius=5, color=color.yellow, 
       make_trail=True) 

Sun.mass = 50 
Earth.mass = 10 

EarthInitialV = vector(5,5,5) 
EarthFinalV = vector(0,0,0) 

while 1 != 2: 
    Distance = Earth.pos - Sun.pos 

    GravitationalEquation = (GravitationalConstant*Sun.mass*Earth.mass)*Distance/mag(Distance)**3 
    Acceleration = GravitationalEquation/Earth.mass 

    SUVAT(EarthInitialV,Distance) 

    Earth.x.pos = Earth.x.pos + EarthFinalV.x 
    Earth.y.pos = Earth.y.pos + EarthFinalV.y 
    Earth.z.pos = Earth.z.pos + EarthFinalV.z 

Answer 1

除了不是正確的物理方程， 誤差通過加入數（分量）和載體（3個分量）引起的。爲了使它工作，你需要SUVAT後重寫功能

def SUVAT(A,B): 
    global EarthFinalV 
    EarthFinalV = sqrt((A) + 2*Acceleration*(B)) 

然後在while環（爲什麼不說while True:），與

Earth.pos = Earth.pos + EarthFinalV 

球有屬性Earth.pos更換3個語句（矢量）或Earth.pos.x（一個組件），但不是Earth.x.pos。

無論如何，你的代碼應該運行，但物理需要更正。