## 4D toys

Discussions about how to visualize 4D and higher, whether through crosseyedness, dreaming, or connecting one's nerves directly to a computer sci-fi style.

### 4D toys

There's a new app that let's you play with 4D shapes by the Miegakure developers
http://4dtoys.com/

Also can anyone explain why I saw a tiger (in orange) there? I thought only this forum knew its existence?
Secret
Trionian

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### Re: 4D toys

Marc ten Bosch is the only person developing Miegakure. He came to this forum to learn more about some of the 4D shapes. And, yes, that is a tiger you see! And the spheritorus, too. They're going mainstream now.
in search of combinatorial objects of finite extent
ICN5D
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### Re: 4D toys

I suspect that 3 axes of a 4D object would be at least visible to a 2D extended plane (3D) viewpoint and that none of these toys should fully disappear to it. Is this incorrect?

Hugh
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### Re: 4D toys

If you slide (translate) a 4D object far enough along a 4th axis (the one you can't see), the shape would be completely pulled out of the 3D plane, and disappear. He may be restricting the distance that you can slide, just enough to keep a small part (of the shape) stuck in the 3-plane.
in search of combinatorial objects of finite extent
ICN5D
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### Re: 4D toys

ICN5D wrote:If you slide (translate) a 4D object far enough along a 4th axis (the one you can't see), the shape would be completely pulled out of the 3D plane, and disappear. He may be restricting the distance that you can slide, just enough to keep a small part (of the shape) stuck in the 3-plane.

On his 4D toys page, there are some animations of some 4D toys moving around on what appears to be a table in front of you. As they move around, or fall down, some of them completely disappear. Would this actually happen? As you look along an z-axis, into the 3rd dimension, forwards along a 2D xy plane at the table in front of you, shouldn't that catch 3 axes of line of sight of any 4D object that would happen to be in front of you? The one to the right and left of you, up and down, and forward towards the table? A 4D toy would have those axes of space within it wouldn't it?

Hugh
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### Re: 4D toys

I've been thinking about this. The sandbox game uses 3 axes to explore a 4D toy. You can move the objects along any single or more axes at once.

Move along any of the 3 axes in our slicing plane, and we see an unchanging toy sliding around in 3D.

Move along the 4th axis that we don't see, and the toy stays in place while changing form (as we slice it top to bottom along the 4th axis).

Move along both an axis in our 3D plane and the 4th axis (diagonally), and we see a toy sliding towards the table, while changing form. Just moving in our 3D slicing space won't change the x-section of the 4D shape. We have to move along that 4th axis, too, to cut at different height levels in 4D.

So, when the toy moves towards the table and changes form/disappears, it's moving diagonally along a plane, in our slicing space and 4D.
in search of combinatorial objects of finite extent
ICN5D
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### Re: 4D toys

I did not expect a tiger either, nor did I expect gyrochora.
Anyways, this game seems like a good way to let beginners into the concept of a fourth dimension.

ubersketch
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