[pstricks] axesboxed with surfaceparametree in solides3d

Zbigniew Nitecki zbigniew.nitecki at tufts.edu
Thu Aug 19 22:55:00 CEST 2010

Yes, the picture is along the right lines.

I understand some of the code, but not all of it.
The starred version of \psSurface does not appear in the pst-solides3d documentation;
I don't see the role of r=3 sqrt 2 mul
and what does the last part of the function definition
	-5 It{pop -5} if
mean or do?

Zbigniew Nitecki
Department of Mathematics
Tufts University
Medford, MA 02155

Office    (617)627-3843
Dept.    (617)627-3234
Dept. fax    (617)627-3966

On Aug 19, 2010, at 15:43, Herbert Voss wrote:

> Am 19.08.2010 16:29, schrieb Zbigniew Nitecki:
>> I am trying to draw the elliptic paraboloid z=4x^2+y^2 and have it enclosed in a box.
>> However, I want to cut the paraboloid at height z=4, which means I must draw it using surfaceparametree rather than \psssurface or other automatic graphing macros (all of which,
>> as far as I can tell, have domain necessarily specified as a rectangle in x and y, rather than an ellipse).  
>> If I try to use \psSolid[object=parallelepiped, then the lines either overwrite or are overwritten by the surface (depending on the order in which I draw surface and box).  However, axesboxed inside the drawing seems to yield nothing:
> http://tug.org/PSTricks/main.cgi?file=Examples/Gallery3D/Gallery3D
> do you mean something like the last example?
> Herbert
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