数学图形(2.15)Spherical sinusoid球面正弦曲线

这个曲线与之前的数学图形(2.7)sphere sine wave很相似.而且个人觉得从其公式上看sphere sine wave更应该叫做球面正弦曲线.当然从渲染的曲线图上看,它是非常明显的贴在球上的正弦曲线.

#http://www.mathcurve.com/courbes3d/sinusoidespherique/sinusoidespherique.shtml

vertices = 

t = from  to (*PI)

a =
n = rand2(0.1, )
k = rand2(0.5, )

w = a/sqrt( + (k*cos(n*t))^)

x = cos(t)*w
z = sin(t)*w
y = k*cos(n*t)*w