[Gnuplot-py-users] parametric surface plots...

[Andy S. <an...@a2...>]

Hi all.

I want to make parametric surface plots, but I can't figure out how to do
it with Gnuplot.py.  I've seen plenty of examples done with gnuplot
functions, but... how to provide my own data?

I can do something like this: (pseudocode)

u = aspan(-0.5*Pi, 0.5*Pi, 100)
v = aspan(0, 2.0*Pi, 100)
uv = cartesian_product(u, v)
g('set parametric')
g.splot(GridData(cos(uv[0])*cos(uv[1]), cos(uv[0])*sin(uv[1]), sin(uv[0]),
type='lines'))

Sure enough, it plots a sphere as expected, but its a line trace not a
true surface, e.g. it can't hide backfaces...

I've seen plenty of examples online using gnuplot's internal functions,
but I've got no idea how to do a parametric surface from input data...  
is this possible?

Thanks,
Andy.

---------------------------------------------------------------
 Andrew (Andy) W. Schmeder
 mailto:an...@a2...
 http://www.a2hd.com