ma...@mendelu.cz wrote:
>   
>> I'm not sure how hard it would be to add one; it would involve figuring
>> out how to clip triangles, separate a 3d plot into separate pieces,
>> etc., I think.
>>
>> Jason
>>
>>     
>
> Once I created this picture for absolute extremum:
> http://user.mendelu.cz/marik/3D/absolutni.html
>
> I used the following steps:
> 1. draw in Maple the function like 2-x^2-y^2  over rectangle
> 2. draw in Maple cylindrical conus and a vertical lines (boundaries)
> 3. export into Javaview, http://www.javaview.de/
> 4. use Javaview to cut the graph of the function by the vertical
> surfaces along boundaries and delete or hide unwanted parts
>
> However, I am not able to find out if Javaview is clever enough to do
> the last step in batch mode and I do not know if this is the good way
> to follow.
>   

Well, you can define a cut plane in jmol, I think.  However:

1. it doesn't look very sophisticated from the docs (you can basically 
cut off a percentage of the scene).

2. it's probably better to do it in Sage before we get to the backends 
so that it works reliably in all of the backends.

Jason



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