我正在GlowScript中用VPython实现一个太阳系。现在,我在运行时收到此错误:错误无法添加标量和向量。我想我做得正确。我是否需要用pos更改某些内容。 ?

这是代码:

GlowScript 2.7 VPython
from visual import *

scene = display(width = 800, height = 800, center = vec(0,0.5,0))

#sun
sonne = sphere(pos = vec (0,0,0), radius=8, color = color.orange, shininess=1)

#earth
erde = sphere(pos = vec (50,0,0), radius=1.5, color = color.blue, make_trail=True)

erdeV = vector(0,0,5)

#masses
erdeM = 5.97*10**24
sonneM = 1.989*10**30

#Grav-constant
G = 6.67259*10**-11

for i in range (1000):
    rate(1000)
    erde.pos = erde.pos + erdeV

    #distance
    entfernung = sqrt(erde.pos.y**2 + erde.pos.z**2)


    #Gravitational law F = G * m * M / r*r --> G*s*e/AE*AE ae=Astr. Einheit
    Fgrav = G *( erdeM * sonneM) / (entfernung*entfernung)
    erdeV = erdeV + Fgrav
    erde.pos += erdeV

    if entfernung <= sonne.radius: break

最佳答案

问题行:

Fgrav = G *( erdeM * sonneM) / (entfernung*entfernung)
erdeV = erdeV + Fgrav


Fgrav是标量(重力的强度),而erdeV是矢量。为了解决这个问题,请包括力的方向:

Fgrav = (-G * (erdeM * sonneM) / (entfernung ** 3)) * erde.pos
erdeV = erdeV + Fgrav

关于python - 无法在VPyhton(GlowScript)中添加标量和矢量错误,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/51024446/

10-12 16:52