[Gnuplot-info] 3D figures in coordinate system

[Carles P. i E. <ca...@pi...>]

Hello,

I need to paint some figures (sphere, cone, hyperboloide, cylinder)
using gnuplot.

I have done all of them but I need to plot in the same output (PNG, for
example). So, I think that I need to use the same coordinate system,
else I need to use set multiplot and unset multiplot and I have too much
problems with the point of view, scale, etc. etc.

I have tried to paint, for example, a sphere, using cartesian system (I
can do it with sphericals, but then I will have problems with other
figures :-) ):
-------------
set isosample 36,18
set ticslevel 0
set size 0.65,1.0

sphere(x,y)=(1-x**3-y**3)**(1/3)
splot sphere(x,y)
pause -1
-------------
Why is not working? What thing from gnuplot I am missing?

I don't want to use multiplot and plot figures with differnt
coordinates, for example this web page:
http://t16web.lanl.gov/Kawano/gnuplot/plot3-e.html
says:
Usually it is difficult to adjust the position of each figure
appropriately. There is no easy way to determine the values of  origin ,
and you have to do it by "trial-and-error".

And gnuplot input is something personalized for users of application, so
I cannot do "try and error" there :-)

thank you very much,

-- 
Carles Pina i Estany		GPG id: 0x8CBDAE64
	http://pinux.info	Manresa - Barcelona