[Matplotlib-users] Animating 3D quiver plot in 1.4.3?

Thomas Caswell tcaswell at gmail.com
Fri Oct 9 16:16:14 CEST 2015

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).


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
>> Sent from the matplotlib - users mailing list archive at Nabble.com.
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