I think the closest you are going to get is with using the "shade=True"
kwarg in plot_surface(). This is the only way that mplot3d utilizes normal
vectors, and that really only makes one side look "duller" than the other.
Since you mentioned wanting to eventually display self-intersecting
surfaces, I would probably suggest trying out Mayavi2 or glumpy instead as
those are more geared towards 3d visualization than mplot3d is. mplot3d has
significant issues with rendering intersecting polygons because it isn't a
true 3d plotting system (it just computes projections of whole polygons and
uses a single z value to represent where in the layering the polygon should
go).
Cheers!
Ben Root
On Mon, Apr 14, 2014 at 9:34 AM, László Oroszlány <oroszla...@gmail.com>wrote:
> well I sort of wanted to avoid doing two spheres.. later on I wanted to
> do more complicated surfaces.. and it can get a bit messy.. It is not
> straight forward to generate the two parallel surfaces in general.. to be
> honest the problematic case would be when i want to display
> selfintersecting but still orientable surfaces (NOT Klein bottles or
> Moebius strips)
> cheers anyway for the quick response
>
> laszlo
>
>
>
> On 14 April 2014 15:21, Shahar Shani Kadmiel <kadm...@post.bgu.ac.il>wrote:
>
>> Hi, I am not aware of such an option (AFAIK) but my suggestion would be
>> to make two spheres with very small radii difference, paint the slightly
>> smaller one (inside) blue and the other one red.
>> Just a quick fix for the problem at hand. I'm sure the experts here will
>> have plenty of very in depth solutions.
>>
>> Shahar
>> —
>> Sent from Mailbox <https://www.dropbox.com/mailbox> for iPhone
>>
>>
>> On Mon, Apr 14, 2014 at 1:48 PM, László Oroszlány
>> <oroszla...@gmail.com>wrote:
>>
>>> Dear matplotlib users,
>>>
>>> I recently started using matplotlib to make a couple of educational
>>> presentations.
>>> For most of my problems I found the manual and the examples on the web
>>> enough,
>>> however I ran into a bit of an issue regarding plotting some surfaces.
>>> My main problem has to do with plotting orientable (or two sided
>>> surfaces).
>>> Simply put I want to plot a sphere cut in half and make the inside red
>>> and the outside blue.
>>> I was wondering if there exist some flag or option in the already
>>> available plotting functions to do this?
>>>
>>> Cheers
>>>
>>> laszlo
>>>
>>>
>>
>
>
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