Portal: Crushed between 2 portals

[the-pi-guy]

[Legend]

The physics of this is interesting.

Chell would crush herself as her feet hit her head and her head hits her feat. Does this collision apply a force to the portals themselves? If yes, then how? The portals are not touching chell in any way so why would she apply a force? If no, then wouldn't this contraption offer unlimited force? A tank could be squished inside by simply dropping the portal from above it.

[the-pi-guy]

The physics of this is interesting.

Chell would crush herself as her feet hit her head and her head hits her feat. Does this collision apply a force to the portals themselves? If yes, then how? The portals are not touching chell in any way so why would she apply a force? If no, then wouldn't this contraption offer unlimited force? A tank could be squished inside by simply dropping the portal from above it.

I think it's just cool that the game tries to do something with it.
Which force is that?  

Also, the portals are nearly 0 length, and when they get crushed, they connect to eachother in an infinite fashion.  
A-B-A-B-A-B-A
The length between each A and B could very well be 0, but still with an infinite number of connections, because they are connected to each other in such a way, the distance and the volume also becomes infinite.  

[Legend]

I think it's just cool that the game tries to do something with it.
Which force is that?  

Also, the portals are nearly 0 length, and when they get crushed, they connect to eachother in an infinite fashion.  
A-B-A-B-A-B-A
The length between each A and B could very well be 0, but still with an infinite number of connections, because they are connected to each other in such a way, the distance and the volume also becomes infinite.  

Well real portals are impossible so no clue what the force would be.

In the game, Portal seems to use a stencil buffer. Essentially the portal is rendered as a green screen while a second render gets the view for that screen.

The camera always stays between portals so in the video it gets stuck perfectly at the edge of both of them. This would cause the camera's entire view to be "green screen" so it shows portal graphics every direction you look.

Every portal render is done without clearing depth data, so it's identical to overlaying the objects. Rotation between the portals causes these replications to have a slight twist, displaying the visuals in the video.


Sadly in game it's closer to 10 than infinite. Every portal render takes a good chunk of power. Even with VizionEck's graphics on PS4 ~100 is about the maximum.

[the-pi-guy]

In the game, Portal seems to use a stencil buffer. Essentially the portal is rendered as a green screen while a second render gets the view for that screen.
The camera always stays between portals so in the video it gets stuck perfectly at the edge of both of them. This would cause the camera's entire view to be "green screen" so it shows portal graphics every direction you look.
Every portal render is done without clearing depth data, so it's identical to overlaying the objects. Rotation between the portals causes these replications to have a slight twist, displaying the visuals in the video.
Sadly in game it's closer to 10 than infinite. Every portal render takes a good chunk of power. Even with VizionEck's graphics on PS4 ~100 is about the maximum.

I'm just saying that's how it could work in some universe!  

Obviously not game universe.  

[Legend]

I'm just saying that's how it could work in some universe!  

Obviously not game universe.  

But portals are impossible unless they work faster than light

Imagine two portals 2 light seconds apart. A gun is super close to the right portal but not in it. This gun shoots a bullet to the right at the speed of light. Then after 2 seconds, it fires a second bullet to the left. Each "reflection" of the guns is 2 seconds slower, so the left and right reflections don't fire their first bullet for two seconds. To the right this means 2 seconds for the bullet to fly and hit the gun destroying it. On the left this means 2 seconds waiting to fire, and then firing left at the same time the reflection fires right. These bullets collide mid air.

So would the hypothetical gun be destroyed or not?

[the-pi-guy]

It works in Newtonian physics.Relativity is super interesting.  I don't completely understand because time dilation makes it difficult to imagine from several reference points. ,
Basically because of time dilation, you can go as far as you want. You can only observe things going up to the speed of light.  In a strange way you could be going faster than the speed of light because time moves slower, but from other reference points, still be seen as going slower.