[Gnuplot-info] Cone in parametric :-)

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

Hello,

I am not able to plot cylinder using cartesian system (I think that is
not possible in gnuplot?)

I am trying to do the figures that I need using parametric coordinate. I
have done without problemes sphere, cylinder but I need cone. 

Here for example:
http://mathworld.wolfram.com/Cone.html

There is the parametric equations (equations number 1, 2 and 3). 

I do in gnuplot:
set parametric
set isosample 51
set ticslevel 0
h=2.0
r=1.0
splot ((h-u)/h)*r*cos(u), ((h-u)/h)*r*sin(u),v
pause -1

And something appears but doesn't look as a cone :-)

Any idea? the formula seems correct, Maybe range problem for u and v?

Thank you very much,

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