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круто :)

Coool vid

wow! this is amazing!

Someone: Portals can't move! Meanwhile Portal 2 for Playstation Move: 😈

Me upon seeing the video in my recommendations: Hey, I've already been one guy to describe everything on the topic brilliantly. Me upon starting the video: Wait a minute... He watched it? Me one minute later: No way!

I disagree with you @4:00 the conservation of momentum is missing when the portal is moving and the object is stationary. when the object is moving it exists the other side portal WITH conservation of it's momentum, which is NOT 0. however if the object has 0 momentum and the portal is moving all pieces of the object will exit the other side with 0 momentum and basically cash into eachother at the edge of the exit portal because the have no momentum and not was imparted on them by the portal.

criminally underrated channel. excited to see what you have for us next!

In the game portal, since objects cannot be subdivided (there can only be one linear and rotational force each acting on the center of mass), and there is a universal reference frame (the hammer grid), the situation of a moving portal must always be A. I understand not wanting to use the mechanics from portal, but that is what makes the question interesting (since a 'physical' interpretation must either be B with mutable portals (not the kind in the game) or impossible). To me introducing relativity is erroneous because that's a law of our world, not portal's, and certainly not all potential games with portals. The portal games already intentionally display infinite gravitational energy due to the displacement of falling objects, so conservation of energy/momentum is irrelevant.

3:50 I'm screaming in horror at the idea of a portal being able to move a stationary object outside of itself. I mean it mathematically makes sense, but my brain and eyes don't want to accept it. Kind of like how light travels at the same speed in every frame of reference.

The issue I still have with moving portals moving an object is that you are creating energy from nothing. There is no equal reaction. A moving portal MUST be slowed by an equal amount of energy to that imparted on the object.

Im here before 1k subs !

Респект

tam da böyle bişey arıyordum 4 yıldan beri

I would argue that an object staying still and a portal moving into it would not affect it's speed. If we are assuming the definition of a portal as a doorway, and that a portal should work the same as a normal doorway, when you have a doorframe and move it through an object, the object does not magically change in speed, it keeps the same speed despite appearing on the other side. A portal simply teleports matter and energy through space, therefore it should not add kinetic energy to an object. If we think about this using newton's first law, an object that is at rest should stay at rest unless it's acted upon by external force. because a regular doorway would not produce force onto an object, by your definition a portal shouldn't either.

Wow! If you have the entrance to a portal facing the exit of the same portal and 2D object in between them. Where does the object go when you bring the portals together and then move both portals away? Like bringing two slices of bread together around some jam and then moving the sandwich away.

Now i also see that bounded portal plane are a hulahoop of extreme sharpness. I love the video, amazing works.

I'm very skeptical that each of the 11 degrees has to be more copies of essentially the same code. See if you can turn it into an unbounded loop that terminates when no more intersections remain.

Hopefully someone at Valve sees this. Then if we get a Portal 3, we may get some very cool portal physics.

did something kinda like it in Superliminal wheeee. broke reality

I've visualised this in my head before but I could never imagine what happens if you ignore the fact that the portals knock into eachother, what happens if you keep pushing? Edit: Nevermind, I didn't watch far enough. Thank you for showing it :D

such a good video! keep it up

Dude, in 100 years, when there are portals in RL, this will be considered groundwork.

21:37 Polska GOROM Kochani 🎉

The big question is: Is this Lorentz Invariant?

Damn ur Russian accent is so strong

Impressive, thanks for sharing the explanation *and* code!

Этот акцент просто имба!

What happens if you shoot a portal on someone and have them jump into the other one?

Very interesting but I think the output shape should be distorted when different shapes are used as portals. So you might be able to put a square Into a triangle and get a circle. Idk but also it's probably different shapes coming out depending on which one is bigger

of course the second portal is an object, and is placed in the space of the first portal, and then works normally. no time/space loop issues.

So I have to be cut a seemingly infinite number of times to pass through a portal? Sounds more like a Star Trek teleporter to me lol

Is this a reupload? I think i saw this video before.

The REAL portals should NOT be movable. Not because of some abstract rule, but because portals are connecting different points in the same space. If portal is moving relative to another, it would mean space itself would be moving relative to itself, which would mean either deformation of space or overlap and holes in space. For example, in your visualisation, one portal moves past the object, but without touching it, and object keeps moving on other side after passing through. It means that it's spatially anchored to original portal. Space that it takes moves through the stationary space in the other side of the portal. In that case, there should be hole in space behind the moving portal, or space should be stretched and compressed around it. Either way, in static space, portals are fixed. After all, you cannot move a hole in the paper without deforming the paper. P.S. In that case, portal entering portal would mean simply folding the space inside portal, making it concave; the portals will never actually intersect.

2 portals moving at the same speed in opposite directions is weird to think about if they preserve momentum

Interesting. I think another con of the analytical method is that adding more than one portal will be very difficult. Now, Instead of just "how many times did this get teleported", you have to consider "this got teleported through A, then B, then A twice, then B inverted". This might be too many "levels"

I love how you start with the example of a door. You are absolutely correct, it is a portal. The sign of a good teacher is being able to immediately connect their students to a familiar concepts. You, sir, are very good at this indeed. I wish you the best and am happy to be here under 1k subs

У меня какое-то дежавю...

8:27 just make the portals a circle instead of a ellipse

I feel like there's no problem in reality, not math, if you break portals. It's just called entanglement. A big portal is just many spacial points being entangled in an ordered way. When you cut the portal you still have 2 portals and you can keep cutting them until atomic scales

This is great work bro! Instant-subscribe. and can't wait to see what else you can do :)

5:57 What if we deformed anything that comes out of the other end so it maps perfectly to other shape? Say we have O shape portal side and L shaped end... If I stick a stick in O I should get hockey stick coming out of L

This is awesome

QR код? Или ютуб и его не любит?

Amazing video

what about Gravity? what if you put the portals on the ceiling and will be half in one, and half in another? you'll be suspended in the air? what if you put the portals on different heights?

algorithm go brrr

We can't move portals because they are not wormholes but rather quantum tunneling. And because it is quantum tunneling it needs to be really cold and since temperature is just the movement of atoms it means you can't move a portal.

:D

Here's a question about portals I've never received a satisfying answer to: Let's say that two portals are facing each other at a set distance. You take a metal pole of a particular length and insert it halfway into one portal such that it's other half is in-line with the first. You hold it in this position. Then, you take a separate pole of sufficient length to join the two tips of the first, and weld the ends together. What happens to the pole? Is it now of infinite length? Is it recursive/a loop? Is it still possible to change the pole's orientation? Could it be removed from the portal? What happens if you stop holding it in position?

Whell in the portal univers so whould it not work becps of it bihing a quantum tuneling portal and they can't be moved. Meow. hi, hej, helo, hola, a-hoj, goten tag, halo, konnichiwa, bonjour ♤] ¡$ #€£