[Matplotlib-users] Animating 3D quiver plot in 1.4.3?
Benjamin Root
ben.v.root at gmail.com
Fri Oct 9 16:33:47 CEST 2015
Oh, right, I forgot about that part.
On Fri, Oct 9, 2015 at 10:16 AM, Thomas Caswell <tcaswell at gmail.com> wrote:
> I would suggest going with the 'just remove the artist' path here unless
> there is a serious performance issue.
>
> The internal artist structure of the 3D quiver is effective for getting
> the lines on the screen, but needs some re-working (it is a collection of
> line segments, not of arrows, so the arrow tail and the two lines is the
> arrow head are actually 3 lines in the collection).
>
> Tom
>
> On Fri, Oct 9, 2015 at 10:03 AM Benjamin Root <ben.v.root at gmail.com>
> wrote:
>
>> Part of the problem with the 3d version of quiver is that it isn't based
>> off of the 2D version of quiver, so there is no "set_UVC" method available.
>> The 3D quiver is just a Line3DCollection object, so you do have access to
>> the set_segments() method, which accepts a MxN(m)x3 array of vertices where
>> M is the number of lines, and N(m) is the number of vertices for line m.
>>
>> To clear a quiver plot, one could just remove the artist, but that is a
>> bit heavy-handed. I think the set_segments() approach above should be
>> sufficient. Note that if you want to do anything special with the colors or
>> some other property, that might be tricker, but doable.
>>
>> Cheers!
>> Ben Root
>>
>>
>> On Thu, Sep 17, 2015 at 4:37 AM, plottingberra <isabellahuang7 at gmail.com>
>> wrote:
>>
>>> Hello!
>>>
>>> I want to create a 3D animation that animates the trajectory of a flying
>>> object. The FuncAnimation object has been really helpful in doing so, but
>>> now I want to plot an arrow (using the Quiver class) depicting the
>>> acceleration vector at the object's position in its path.
>>>
>>> My key problem is that I only want exactly one arrow on the plot at a
>>> time.
>>> Currently I am able to create an animated trail of arrows, but I want to
>>> clear the arrows that were plotted before a certain time t. I know that
>>> there exists a method set_UVC that allows for this sort of data updating,
>>> but I cannot get it to work for the 3D case.
>>>
>>> Alternatively, I tried searching for a method that clears the entire
>>> quiver
>>> plot (inelegant, but should work for my loop), but was unsuccessful in
>>> finding one that works.
>>>
>>> I'd like to ask, then:
>>> 1. Is there a way of making set_UVC work for my 3D case?
>>> 2. What is the proper way to clear a quiver plot?
>>>
>>> Thank you so much!
>>>
>>>
>>>
>>> --
>>> View this message in context:
>>> http://matplotlib.1069221.n5.nabble.com/Animating-3D-quiver-plot-in-1-4-3-tp46181.html
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