We perceive at least four (4) dimensions:

  1. location in X
  2. location in Y
  3. location in Z
  4. location in Time

(x,y,z,t).

This brings up the question, then, of “what is 3D?”.

Does 3D describe(x,y,z), or, does 3D describe (x,y,t)?

Blender says that 3D means (x,y,z).

Flash says that 3D means (x,y,t). Note that Flash is now replaced by the newer Wick project. I guess that .gifs falls into this category, too.

In fact, 3D is just a subset of 4D.

How many subsets of 4D are there?

4! = 24, but, order doesn’t matter. (x,y,z,t) is the same as (x,y,t,z) for our purposes.

The only thing that matters is which units are used to represent quantities in these dimensions. There are only 2 different units:

  1. spatial
  2. temporal.

Hence, there are only 2! permutations that matter to us.

I suggest that we name each of these permutations differently, when discussing them, e.g.

  • 3Ds concerns 3D using only spatial coordinates, e.g. (x,y,z)
  • 3Dt concerns 3D using, both, spatial and temporal coordinates, e.g. (x,y,t)

Appendix - See Also

References

https://guitarvydas.github.io/2021/12/15/References.html

Blogs

blog

obsidian blogs (see blogs that begin with a date 202x-xx-xx-)

Videos

videos - programming simplicity playlist

Books

leanpub’ed (disclaimer: leanpub encourages publishing books before they are finalized - these books are WIPs)
Programming Simplicity Takeaways, and, Programming Simplicity Broad Brush

Discord

Programming Simplicity all welcome, I invite more discussion of these topics, esp. regarding Drawware and 0D

Twitter

@paul_tarvydas

Mastodon

(tbd, advice needed re. most appropriate server(s))