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我正在開發的項目應該模擬沿着由彈簧連接的一組球體的脈衝。我試圖在脈衝沿着鏈條向下移動時減小彈簧長度，但是當我運行它時，沒有任何反應。當我運行它時，改變彈簧長度的循環不會改變任何東西
這裏是我的代碼：
from visual import *
one = sphere(pos=(-10,0,0), radius = 0.5, color = color.red)
two = sphere(pos=(-8,0,0), radius = 0.5, color = color.orange)
three = sphere(pos=(-6,0,0), radius = 0.5, color = color.yellow)
four = sphere(pos=(-4,0,0), radius = 0.5, color = color.green)
five = sphere(pos=(-2,0,0), radius = 0.5, color = color.blue)
six = sphere(pos=(0,0,0), radius = 0.5, color = color.cyan)
seven = sphere(pos=(2,0,0), radius = 0.5, color = color.magenta)
eight = sphere(pos=(4,0,0), radius = 0.5, color = color.white)
nine = sphere(pos=(6,0,0), radius = 0.5, color = color.red)
ten = sphere(pos=(8,0,0), radius = 0.5, color = color.orange)
spring1 = helix(pos = (-10, 0, 0), length = 2, radius = 0.3,
thickness = 0.05, color = color.red)
spring2 = helix(pos = (-8, 0, 0), length = 2, radius = 0.3,
thickness = 0.05, color = color.orange)
spring3 = helix(pos = (-6, 0, 0), length = 2, radius = 0.3,
thickness = 0.05, color = color.yellow)
spring4 = helix(pos = (-4, 0, 0), length = 2.0, radius = 0.3,
thickness = 0.05, color = color.green)
spring5 = helix(pos = (-2, 0, 0), length = 2.0, radius = 0.3,
thickness = 0.05, color = color.blue)
spring6 = helix(pos = (0, 0, 0), length = 2.0, radius = 0.3,
thickness = 0.05, color = color.cyan)
spring7 = helix(pos = (2, 0, 0), length = 2.0, radius = 0.3,
thickness = 0.05, color = color.magenta)
spring8 = helix(pos = (4, 0, 0), length = 2.0, radius = 0.3,
thickness = 0.05, color = color.white)
spring9 = helix(pos = (6, 0, 0), length = 2.0, radius = 0.3,
thickness = 0.05, color = color.red)
masses = [one, two, three, four, five, six, seven, eight, nine, ten]
springs = [spring1, spring2, spring3, spring4, spring5, spring6, spring7,
spring8, spring9]
while True:
n=0
deltax=.2
while n < 10:
rate(30)
masses[n].pos.x = masses[n].pos.x + deltax
if n < 9:
springs[n].pos = masses[n].pos
springs[n].axis = masses[n+1].pos-masses[n].pos
n=n+1
n = n-1
while n >= 0:
rate(30)
masses[n].pos.x = masses[n].pos.x - deltax
if n < 0:
springs[n-1].pos = masses[n-1].pos - deltax
springs[n-1].axis = masses[n].pos-masses[n-1].pos
n = n-1
while True:
m=0
deltat=.2
while m<9:
rate(30)
springs[m].length = springs[m].length - deltat
springs[m].length = springs[m].length + deltat
m=m+1
m=m-1
while n>=0:
rate(30)
springs[m].length = springs[m].length - deltat
springs[m].length = springs[m].length + deltat
m=m-1