On Thu, Mar 7, 2013 at 5:32 PM, Brickle Macho <bricklema...@gmail.com> wrote: > Thanks. I had a quick read of the thread linked, if I was a > stronger/better programmer I would see if I could contribute. > > For now I plan calculate/plot the angle between the normal and each the > X,Y,Z planes. I hopefully the 3 subplots will visually convey sufficient > information.
Correct me if I'm wrong, but would a 2D quiver plot on top of a contour plot work? What spaces does the surface map to/from? If your surface can be expressed as a function f:R^2 -> R then it's equivalent to look at its level sets, rather than the 3D picture. You can then project the surface normals onto the plane and plot them with a 2D quiver plot. If you want to keep the z-component information, then you could colour the arrows according to the angle they make with the x-y plane. Does that make sense? I put the original feature request in, and I think it would be useful, but often I still find it easier to process two dimensional information. N.B. The above will only work for *functions* f:R^2 -> R. To clarify, a sphere cannot be expressed this way, because the resulting mapping would be multivalued. Using this method, two distinct surface normals may have the same colour. Hope that makes sense. Best wishes, Damon > > Brickle. > -- > > > On 8/03/13 5:43 AM, Benjamin Root wrote: > > > > On Thu, Mar 7, 2013 at 4:25 PM, Eric Firing <efir...@hawaii.edu> wrote: >> >> On 2013/03/07 9:19 AM, Benjamin Root wrote: >> > >> > >> > On Thu, Mar 7, 2013 at 2:14 PM, Brickle Macho <bricklema...@gmail.com >> > <mailto:bricklema...@gmail.com>> wrote: >> > >> > I have a list of surface normals I would like to plot. Is there a >> > way >> > to plot a 3D vectors in matplotlib similar to how quiver plots 2D >> > vectors? >> > >> > >> > Not at this time, but that would make a great feature request! I think >> > the current roadblock to such a function is a bug with converting 2d >> > arrow objects into 3d arrows. >> >> Quiver uses a PolyCollection, and I see that there is a Poly3DCollection. >> >> Eric >> >> > >> > Ben Root >> >> > > Took a bit of digging, but I knew I remembered this question before: > > http://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&cad=rja&ved=0CDMQFjAA&url=http%3A%2F%2Fmatplotlib.1069221.n5.nabble.com%2F2D-Quiver-in-Axes3D-td27944.html&ei=Pwk5UfGdLufv0QHuroD4BA&usg=AFQjCNEqlWv2vY5l2IPcje-g6B0U21wDNw&bvm=bv.43287494,d.dmQ > > And the feature request is here: > https://github.com/matplotlib/matplotlib/issues/1026 > > In the thread I pointed out a bug that I encountered. I really hope I get > some free time soon so that I can work on the various feature requests in > mplot3d. > > Cheers! > Ben Root > > > > ------------------------------------------------------------------------------ > Symantec Endpoint Protection 12 positioned as A LEADER in The Forrester > Wave(TM): Endpoint Security, Q1 2013 and "remains a good choice" in the > endpoint security space. For insight on selecting the right partner to > tackle endpoint security challenges, access the full report. > http://p.sf.net/sfu/symantec-dev2dev > > > > _______________________________________________ > Matplotlib-users mailing list > Matplotlib-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/matplotlib-users > > > > ------------------------------------------------------------------------------ > Symantec Endpoint Protection 12 positioned as A LEADER in The Forrester > Wave(TM): Endpoint Security, Q1 2013 and "remains a good choice" in the > endpoint security space. For insight on selecting the right partner to > tackle endpoint security challenges, access the full report. > http://p.sf.net/sfu/symantec-dev2dev > _______________________________________________ > Matplotlib-users mailing list > Matplotlib-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/matplotlib-users > -- Damon McDougall http://www.damon-is-a-geek.com Institute for Computational Engineering Sciences 201 E. 24th St. Stop C0200 The University of Texas at Austin Austin, TX 78712-1229 ------------------------------------------------------------------------------ Symantec Endpoint Protection 12 positioned as A LEADER in The Forrester Wave(TM): Endpoint Security, Q1 2013 and "remains a good choice" in the endpoint security space. For insight on selecting the right partner to tackle endpoint security challenges, access the full report. http://p.sf.net/sfu/symantec-dev2dev _______________________________________________ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
