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4D Toys: how objects bounce and roll in 4D – paper accepted to SIGGRAPH 2020

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Re: 4D Toys: how objects bounce and roll in 4D – paper accepted to SIGGRAPH 2020

#61

Post by drdeca »

thatcherc wrote: post #4
jfkebwjsbx wrote: post #3

There was an indie game that had 4D puzzles (as in actual 3D + time), and the person/team behind the game developed a framework and map editor to work with those properly... I cannot recall the name, but it looked awesomely complex!

Was the game Miegakure [0]? It has the same author as this paper/post, and pretty much seems to be the premiere 4D game. The parent link says that the research shown here was developed for Miegakure, so it might be the game you're thinking of. [0] - https://miegakure.com/

probably not, because they are describing a 3+1 game where there are substantial time-manipulation puzzles.

Wish people wouldn't call "game with time manipulation mechanics" "4d" though.

I do remember there was a game which was like, an rts, but with time manipulation bits.

Ah, but that didn't really feature 3d movement, so probably not what they are thinking of?

I also remember a 4d spaceship shooter game..

Re: 4D Toys: how objects bounce and roll in 4D – paper accepted to SIGGRAPH 2020

#62

Post by jobigoud »

avhon1 wrote: post #48
zokier wrote: post #11

It would be interesting to see how it would look with the 4D scenes properly projected instead of cross-sectioned. I mean that is how we get 3D scenes on our puny 2D displays; we don't generally do the sort of cross-sections for 3D like they show in the flat-land example except in some specialized applications. Of course cross-section is still valid method of visualization. I don't know enough about higher dimensiona…

You could display 3D projections of 4D objects on a 2D screen with anaglyph graphics. (Think red- and blue-filtered glasses.) https://en.wikipedia.org/wiki/Anaglyph_3D

You can also see the projections as 3d objects in VR.

Re: 4D Toys: how objects bounce and roll in 4D – paper accepted to SIGGRAPH 2020

#63

Post by jobigoud »

FPGAhacker wrote: post #45
jblow wrote: post #44

Earlier quoted context omitted.

He would be able to see a circle the same way you can see a sphere. Do you feel like you can only see discs, not spheres?

How different would a 2d square look projected onto a 1d view, vs a circle?

If the object is lit at an angle the shading will be completely different, the edge of the square will create a harsh line.

Re: 4D Toys: how objects bounce and roll in 4D – paper accepted to SIGGRAPH 2020

#64

Post by cloud-oak »

zokier wrote: post #11

It would be interesting to see how it would look with the 4D scenes properly projected instead of cross-sectioned. I mean that is how we get 3D scenes on our puny 2D displays; we don't generally do the sort of cross-sections for 3D like they show in the flat-land example except in some specialized applications. Of course cross-section is still valid method of visualization. I don't know enough about higher dimensiona…

The thing is, 3D to 2D projections work well because that's how our eyes work in the first place, so we can intuitively understand a projected image on the screen.

When projecting 4D to 2D, weird things start happening. Instead of a ray, each pixel now represents a plane in 4D space. So even while it can be done mathematically, the brain is just overwhelmed by what happens when you e.g. rotate the projection

Re: 4D Toys: how objects bounce and roll in 4D – paper accepted to SIGGRAPH 2020

#65

Post by peter_l_downs »

hombre_fatal wrote: post #58
anigbrowl wrote: post #40

Earlier quoted context omitted.

Annihilation (2018) Spoiler, obviously: https://www.youtube.com/watch?v=uBsJgceM0KI - if you haven't seen it cannot recommend it highly enough, just wait and watch the whole thing.

Perfect music for that scene. One thing Annihilation did for me was really get me to the point mentally where I could start to appreciate just how mindblowing it is to encounter such different life like in the movie. By the time the end of the movie came around, I could really get a grip on how horrifying the "choreographed" scene would be, or encountering a floating mandelbrot set, c'mon. That is pure terror. And th…

if you like those sounds you may like Burial, of which it immediately reminded me

https://www.youtube.com/watch?v=v27jdRub2GQ

Re: 4D Toys: how objects bounce and roll in 4D – paper accepted to SIGGRAPH 2020

#68

Post by jayd16 »

jawns wrote: post #16
jayd16 wrote: post #9

I'll ask any physicists out there. A 4th spatial dimension probably doesn't exist, right? Even if we couldn't perceive shapes across a 4th dimension, we would still perceive things moving through the 4th dimension like we see in 4D toys. In reality we don't ever see anything like this (spatially anyway). Is that correct?

Keep in mind that on Earth-scale, movement through the fourth dimension would be pretty easy to notice. There's a lot of stuff on Earth, so seeing objects bounce in and out of view would be a pretty big deal. But our universe as a whole is almost entirely empty space, with visible objects appearing to make up only about 5 percent of the universe's total volume. Noticing 4D things flit in and out of our 3D universe mi…

I understand what you're saying but it doesn't make sense to me why this would be a rare occurrence. How could all the varied matter we perceive be so perfectly smooth and inertia free along the 4th dimension that we see no collisions resulting in movement along a 4th dimension?

Re: 4D Toys: how objects bounce and roll in 4D – paper accepted to SIGGRAPH 2020

#69

Post by curiousgal »

throwaway_pdp09 wrote: post #19

I am genuinely surprised for a long time that I've not seen 4D monsters in films. It has been so obvious to me there's potential there. It would of course be a flat 2D projection of a 3D slice through a 4D creature, so it would look like a smoothly morphing between different creatures, and in and out of existence so we've sort of had morphing for a long while (since Willow, C. 1985) but... there's potential. In case…

[SPOILER]

     _____________________________________________________________________________________________________________________________________________________________________Interstellar kinda touched on that.

Re: 4D Toys: how objects bounce and roll in 4D – paper accepted to SIGGRAPH 2020

#70

Post by Random_ernest »

throwaway_pdp09 wrote: post #19

I am genuinely surprised for a long time that I've not seen 4D monsters in films. It has been so obvious to me there's potential there. It would of course be a flat 2D projection of a 3D slice through a 4D creature, so it would look like a smoothly morphing between different creatures, and in and out of existence so we've sort of had morphing for a long while (since Willow, C. 1985) but... there's potential. In case…

In the Hyperion books by Dan Simmons there is a being that can move in higher dimensions and the books will reportedly get a movie. Maybe they will adapt some effects like this.
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