The simple wrapper I have looks like:
def add_torus(outer_radius, cross_section_radius, center, orientation):
torus = mlab.pipeline.parametric_surface()
torus.function = 'torus'
torus.parametric_function.ring_radius = outer_radius -
cross_section_radius
torus.parametric_function.cross_section_radius = cross_section_radius
mlab.pipeline.surface(torus)
torus.children[0].children[0].actor.actor.origin = center
torus.children[0].children[0].actor.actor.orientation = orientation
return torus
When I call this it produces a torus with correct dimensions but the center
and orientation seem to have no effect. I don't get access to the .children
until after the mlab.pipeline.surface(torus) call. Setting these traits
doesn't seem to change them. Any idea what I'm missing?
Jason
moorepants.info
+01 530-601-9791
On Mon, Dec 16, 2013 at 5:23 PM, Jason Moore <moorepa...@gmail.com> wrote:
> Ok, that will probably work for my case. I may just write a simple wrapper
> class that gives me easy access to the .origin and .orientation attributes.
>
> I'll use the points3d for the other primitives.
>
> Thanks.
>
>
> Jason
> moorepants.info
> +01 530-601-9791
>
>
> On Mon, Dec 16, 2013 at 5:06 PM, Roan LaPlante <aestri...@gmail.com>wrote:
>
>> The easiest thing to do for cones, spheres, and cylinders is to represent
>> them as types of glyphs produced by mlab.points3d. These have positional
>> and scale attributes which can easily be modified. Modifying their
>> orientation is also possible (i.e. s.actor.actor.orientation) -- but will
>> require some additional math translation to get everything aligned
>> correctly.
>>
>> Torii may be a little bit trickier. It may be that the ParametricSource
>> is the easiest way to generate a torus and then you can find ways to wrap
>> the attributes you need. I'm not sure. If you only need to ever adjust
>> them in a gross way with only the parameters you just mentioned, the hack
>> of modifying s.children[0].children[0].actor.actor.origin (and
>> s.chldren[0].children[0].actor.actor.orientation) might be reasonable.
>> There also may be some vtk source that somebody has written that does a
>> nicer job that you could just use instead.
>>
>>
>> On Mon, Dec 16, 2013 at 4:36 PM, Jason Moore <moorepa...@gmail.com>wrote:
>>
>>> Sorry, default isn't to reply all on this list.
>>>
>>> Jason
>>> moorepants.info
>>> +01 530-601-9791
>>>
>>>
>>> ---------- Forwarded message ----------
>>> From: Jason Moore <moorepa...@gmail.com>
>>> Date: Mon, Dec 16, 2013 at 4:34 PM
>>> Subject: Re: [MayaVi-users] How to transform and rotate parametric
>>> surfaces?
>>> To: Roan LaPlante <aestri...@gmail.com>
>>>
>>>
>>> I just want a quick way to draw primitives (tori, spheres, cones,
>>> cylinders) in a scene with particular dimensions and be able to rotate and
>>> translate them with respect to other objects I've created with mlab.mesh.
>>>
>>> Ideally I'd like something like:
>>>
>>> torus = mlab.Torus()
>>> torus.center = [2., 3., 4.]
>>> torus.orientation = [[0.1, 0.1, 0],
>>> [0.2, 0.3, 0],
>>> [0, 0, 1]]
>>> torus.ring_radius = 5.0
>>> torus.cross_section_radius = 0.2
>>> mlab.show()
>>>
>>> Does the tvtk or mayavi api offer anything like this?
>>>
>>>
>>>
>>> Jason
>>> moorepants.info
>>> +01 530-601-9791
>>>
>>>
>>> On Mon, Dec 16, 2013 at 4:21 PM, Roan LaPlante <aestri...@gmail.com>wrote:
>>>
>>>> Hi Jason,
>>>>
>>>>
>>>> What are you trying to do? In general, mayavi does not have universal
>>>> and easily manipulable concepts of what space its visualizations occupy.
>>>> Rather, sources occupy some space, and different sources vary extensively
>>>> in how easily they are manipulated (mostly because they are not very
>>>> featureful sources in vtk, and all mayavi does is wrap the vtk source).
>>>>
>>>> However, in general if you're unsatisfied with the API that mayavi
>>>> provides you to work with your visualizations, its almost always possible
>>>> to hack these further and effectively do some vtk programming. For
>>>> instance, if you wanted to displace this torus in the x,y,z plane, you
>>>> could edit the s.children[0].children[0].actor.actor.origin trait.
>>>>
>>>>
>>>> R
>>>>
>>>>
>>>> On Mon, Dec 16, 2013 at 3:19 PM, Jason Moore <moorepa...@gmail.com>wrote:
>>>>
>>>>> I've created torus like so:
>>>>>
>>>>> from mayavi import mlab
>>>>> s = mlab.pipeline.parametric_surface()
>>>>> s.function = 'torus'
>>>>>
>>>>> And can change it's geometry like:
>>>>>
>>>>> s.parametric_function.ring_radius = 10.0
>>>>>
>>>>> But how do I transform and locate the object in the main coordinate
>>>>> system? I can't seem to figure this out...
>>>>>
>>>>> Jason
>>>>> moorepants.info
>>>>> +01 530-601-9791
>>>>>
>>>>>
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>>>
>>>
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