折线图8-绘制正方体
R=滑动条(0,5,0.01)
赋值(R,1)
A=(1,1,-1) R
B=(-1,1,-1) R
C=(-1,-1,-1) R
D=(1,-1,-1) R
l1={A,B,C,D,A}
f(x)=折线图{0...4,x(l1))
g(x)=折线图{0...4,y(l1))
#缩放
p(x)=折线图{0...3,{0,1,1,0})
#高
h(x)=折线图{0...3,{-1,-1,1,1})
a=曲线((f(t),g(t)) p(s)+(0,0,h(s)),s,0,3,t,0,4)
#可调节,s,0,3.01,t,0,4.01)