数学图形(1.40)T_parameter

不记得在哪搞了个数学公式生成的图形.

vertices = 1000

t = from 0 to (2*PI)
r = 2.0
x = r*(5*cos(t) - cos(6*t))
y = r*(3*sin(t) - sin(4*t))

给线加上一维变量的变化,使之变成面:

vertices = D1:360 D2:21

u = from 0 to (2*PI) D1
v = from 0 to 20 D2

x = (v+2)*cos(u) - cos((v+3)*u)
y = v*sin(u) - sin((v+1)*u)