[yt-dev] Orientation, coordinate systems

[Nathan Goldbaum]

I would also like to see this fixed.

It would also be nice to see volume renderings, off-axis projections and
cutting planes align with the plot coordinate axes when the normal vector
is aligned with one of the coordinate axes.

I think the orientation class is already used everywhere where it would be
appropriate.  Matt, can you clarify a bit what you mean by "not used
everywhere"?


On Fri, Jan 17, 2014 at 10:24 AM, Britton Smith <brittonsmith at gmail.com>wrote:

> I imagine this still leaves a number of people in the dark.  Unless I
> misunderstand, my issue was that slices and projections do not follow the
> right hand rule, in that the following should be true:
> slice_axis image_x image_y
> ##########################
> x          y       z
> y          z       x
> z          x       y
>
> slice_axis image_x image_y
> ##########################
> x          y       z
> y          x       z
> z          x       y
>
> I guess it's really just viewing along the y axis, but it does lead to
> having to do some work-arounds here and there.  I would be in favor of
> fixing this issue.
>
>
> On Fri, Jan 17, 2014 at 6:11 PM, Matthew Turk <matthewturk at gmail.com>wrote:
>
>> Yes, sorry.  The common criticism is that it's not a right-handed
>> coordinate system, and that the Orientation class is not used
>> everywhere.
>>
>> On Fri, Jan 17, 2014 at 12:54 PM, John ZuHone <jzuhone at gmail.com> wrote:
>> > Ditto.
>> >
>> > On Jan 17, 2014, at 12:53 PM, Britton Smith <brittonsmith at gmail.com>
>> wrote:
>> >
>> > Hi Matt,
>> >
>> > Can you expand on the context here?  I don't think I know exactly what
>> > you're referring to.
>> >
>> > Britton
>> >
>> >
>> > On Fri, Jan 17, 2014 at 5:11 PM, Matthew Turk <matthewturk at gmail.com>
>> wrote:
>> >>
>> >> Hi all,
>> >>
>> >> I'd like to open up the discussion of "fixing" the yt coordinate
>> >> systems, as we move nearer and nearer on 3.0.  Jeff, Nathan and
>> >> Britton have brought this up a couple times, that the x/y/z ordering
>> >> is not consistent with what they expect, and I'd like to figure out if
>> >> we can fix that now -- it's as good a time as any for bandaid ripping.
>> >>  It may just be a matter of the transposition of buffers and the
>> >> x_dict and y_dict, or it might be more complex, although I suspect it
>> >> won't be much more than fixing those two items.
>> >>
>> >> -Matt
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