螺纹线  t=1 xt=4*cos(t*(5*360)) yt=4*sin(t*(5*360)) zt=6*t 蛇形线  t=1 xt=2*cos(t*360*3)*t yt=2*sin(t*360*3)*t zt=(sqrt(sqrt(sqrt(t))))^3*5 t=1 r=t*3 theta=t*360*3 zt=sqrt(t)*7 t=1 rho=360*sqrt(t)*2 theta=t*25 phi=360*t*4 双余弦线  t=1 xt=-(9.5*6.5)+t*(9.5*6.5*2) yt=cos(t*360*6.5)*(6.35/2)-(6.35/2) zt=cos(t*360*8)*5 |
