[pstricks] Drawing a Klein Bottle
Oliver Schmitt
schmitt at med.uni-rostock.de
Wed Jan 30 18:57:14 CET 2013
set parametric
x(u,v)= v<2*pi ? (2.5-1.5*cos(v))*cos(u) : \
v<3*pi ? -2+(2+cos(u))*cos(v) : \
-2+2*cos(v)-cos(u)
y(u,v)= v<2*pi ? (2.5-1.5*cos(v))*sin(u) : \
sin(u)
z(u,v)= v<pi ? -2.5*sin(v) : \
v<2*pi ? 3*v-3*pi : \
v<3*pi ? (2+cos(u))*sin(v)+3*pi : \
-3*v+12*pi
splot x(u,v),y(u,v),-z(u,v) w pm3d
Am 30.01.2013 17:29, schrieb Rich Shepard:
> Several months ago I found a nice image of a Klein bottle drawn with
> gnuplot, but the code was no longer available on the Web. So I
> searched for
> PSTricks code to draw one rather than re-inventing the wheel, but did not
> find any.
>
> Has anyone drawn such an image with PSTricks? If so, may I use and
> modify
> the code? If not, please pass me a pointer where I should start to create
> this image. The gnuplot version is attached as a .jpg file.
>
> TIA,
>
> Rich
>
>
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