无法在vpyhton(glowscript)中添加标量和向量错误 [英] Cannot add scalar and a vector error in vpyhton (glowscript)
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问题描述
我正在使用GlowScript中的VPython实现太阳能系统。现在我在运行时收到此错误:错误无法添加标量和向量。我想我做得很好。我是否必须用pos改变一些东西。这是代码:
I'm implementing a solar system with VPython in GlowScript. Now I have received this error when running: Error cannot add scalar and a vector. I think I've done all correctly. Do I have to change something with the pos. ?
Here is the code:
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
我尝试过:
我试图改变坐标x,y, pos的z但是没有用。
What I have tried:
I tried to change the coordinates x,y,z of pos but that didn't work.
推荐答案
erdeV = erdeV + Fgrav
Fgrav是一个标量值,而不是矢量...你可以添加两个向量,但只能通过标量划分或乘以向量...
Fgrav is a scalar value and not vector... You can add two vectors but only divide or multiply vector by scalar...
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