Message #3910

From: Joel Karlsson <joelkarlsson97@gmail.com>
Subject: Re: [MC4D] Notation
Date: Wed, 03 Jan 2018 07:49:35 +0100

Great input!

Melinda and Marc have convinced me. As a mathematician I strive not to be
bounded by notation so even though I’m more familiar with z-up I’ll go with
x-right, y-up, z-toward yourself. Of course, everyone is free to use their
personal preference personally but when communicating it’s great to have a
convention.

Best regards,
Joel

PS. Notation and more details on my solution upcoming shortly.

Den 3 jan. 2018 12:53 fm skrev "Melinda Green melinda@superliminal.com
[4D_Cubing]" <4D_Cubing@yahoogroups.com>:

>
>
> I must agree with Marc. I didn’t know about the speed solving community’s
> convention, and that’s probably the strongest argument. Coming from
> computer graphics, this has been a perennial discussion. Programmers,
> mathematicians and artist/modelling communities overlap in interests and
> coordinate preferences like a Venn diagram depending upon whether you
> prefer to think in terms of screen space or world space. There’s general
> agreement to begin with +X being to the right. Everything else can cause
> tension, but the one compromise that everyone seems to be able to live with
> is making sure that +Y is always up. (Some world-space people prefer +Z up
> while some graphics people prefer +Y as down.) The phrase "Y is up" has
> therefore become a kind of touchstone. Given that, positive Z can then be
> chosen to produce one’s desired handedness. I have no preference on
> handedness, but since you prefer right-handed, that means +Z should be
> toward yourself.
>
> -Melinda
>
> On 1/2/2018 8:46 AM, Joel Karlsson joelkarlsson97@gmail.com [4D_Cubing]
> wrote:
> > Hello,
> >
> > I’m planning to post a more detailed solution of the physical 2^4 but
> > to do so I need some notation. I understand that my previous post on
> > notation was too long and too complicated. Luckily, I have since
> > realised that a simpler notation is sufficient but before I introduce
> > it I need some input from you. What coordinate system do you prefer?
> >
> > It would be great if we could decide on one coordinate system and then
> > use that as a convention. Personally, I think that the coordinate
> > system should be right-handed but besides that, I can use pretty much
> > any. Two great alternatives are (for the positive half axes):
> > x-right, y-away from yourself, z-up
> > x-right, y-up, z-toward yourself
> >
> > What do you think?
> >
> > Best regards,
> > Joel
>
>
>