VPython对象革命
VPython对象革命
提问于 2018-05-30 17:06:52
现在必须使用VPython，我想建立一个太阳系的模型。
目前我有所有的行星和轨道环，然而，实际的轨道是我所发现的非常困难的。
GlowScript 2.7 VPython
from visual import *
# Declaring Celestial Body Objects
Sun = sphere(pos = vec(0, 0, 0), radius = 10, color = color.yellow)
Mercury = sphere(pos = vec(25, 0, 0), radius = 2, color = color.green)
Venus = sphere(pos = vec(40, 0, 0), radius = 2.5, color = color.red)
Earth = sphere(pos = vec(50, 0, 0), radius = 2.65, color = color.blue)
Mars = sphere(pos = vec(70, 0, 0), radius = 2.3, color = color.red)
Jupiter = sphere(pos = vec(90, 0, 0), radius = 3, color = color.orange)
Saturn = sphere(pos = vec(105, 0, 0), radius = 2.9, color = color.orange)
Uranus = sphere(pos = vec(117.5, 0, 0), radius = 2.9, color = color.orange)
Neptune = sphere(pos = vec(135, 0, 0), radius = 2.8, color = color.blue)
Pluto = sphere(pos = vec(165, 0, 0), radius = 1.5, color = color.white)
# Declaring Orbital Rings of Celestial Body Objects
Mercury.ring = ring(pos = vec(0, 0, 0), axis = vec(0, 1, 0), size = vec(0.1, Mercury.pos.x * 2, Mercury.pos.x * 2))
Venus.ring = ring(pos = vec(0, 0, 0), axis = vec(0, 1, 0), size = vec(0.1, Venus.pos.x * 2, Venus.pos.x * 2))
Earth.ring = ring(pos = vec(0, 0, 0), axis = vec(0, 1, 0), size = vec(0.1, Earth.pos.x * 2, Earth.pos.x * 2))
Mars.ring = ring(pos = vec(0, 0, 0), axis = vec(0, 1, 0), size = vec(0.1, Mars.pos.x * 2, Mars.pos.x * 2))
Jupiter.ring = ring(pos = vec(0, 0, 0), axis = vec(0, 1, 0), size = vec(0.1, Jupiter.pos.x * 2, Jupiter.pos.x * 2))
Saturn.ring = ring(pos = vec(0, 0, 0), axis = vec(0, 1, 0), size = vec(0.1, Saturn.pos.x * 2, Saturn.pos.x * 2))
Uranus.ring = ring(pos = vec(0, 0, 0), axis = vec(0, 1, 0), size = vec(0.1, Uranus.pos.x * 2, Uranus.pos.x * 2))
Neptune.ring = ring(pos = vec(0, 0, 0), axis = vec(0, 1, 0), size = vec(0.1, Neptune.pos.x * 2, Neptune.pos.x * 2))
Pluto.ring = ring(pos = vec(0, 0, 0), axis = vec(0, 1, 0), size = vec(0.1, Pluto.pos.x * 2, Pluto.pos.x * 2))
# Infinite Loop
while 1 == 1:
Mercury.rotate(angle = radians(360), axis = vec(Mercury.pos.y, Mercury.pos.x, 0), origin = vec(0, 0, 0))
rate(50)
print("Error! Escaped While Loop!")当我用Mercury.rotate(angle = 0.0174533, axis = vec(0, Mercury.pos.x, 0), origin = vec(0, 0, 0))切换出旋转方法时，它会正确地旋转.但只有四分之一的轮值。我读过关于这的一切，但是N/A。
在四分之革命之后，当角度较大时，行星有时会决定以暴力的方式“夺取”。这似乎是某种障碍。
回答 1
Stack Overflow用户
发布于 2018-11-15 18:18:41
您应该编写axis=vec(0,1,0)。旋转轴需要总是指向向上。
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原文链接：
https://stackoverflow.com/questions/50610101
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