NB. Hyperbolic Paraboloid

hyperpara=: 3 : 0
P=. steps _1.25 1.25 10
T=. steps _1.1 1.1 10
T=. steps _1.1 1.1 10
X=. -P */ cosh T
Y=. P */ sinh T
Z=. 1-*: P
makexyz X;Y;Z
)

2 drawsurface makenewlist hyperpara''

ROTXYZ=: 285 0 335
CLEARCOLOR=: SALMON

demo=: 3 : 0
stdlistlight''
2 drawsurface makenewlist hyperpara''
)

demo''
