Water should pass through Portals in Portal 2

[SpectralJulian]

Could create some interesting puzzles.

And it's about time games had water physics.

[GrownupLawolf]

Originally Posted by SpectralJulian

Could create some interesting puzzles.

And it's about time games had water physics.

If paint can pass through (and I'm pretty sure it will, according to the GI article), I'm sure that water also will.

[The Mayor]

Sorry, dynamic fluid physics are still too advanced.

Unless you want to play Portal 2: Slideshow, that is.

[GrownupLawolf]

Originally Posted by The Mayor

Sorry, dynamic fluid physics are still too advanced.

Unless you want to play Portal 2: Slideshow, that is.

Ever seen the nVidia PhysX demos?
Especially the one with the dynamic fluid physics?
I mean the one which plays at a decent 40FPS?

It shows it's possible. Maybe Valve finds (or has already found) a way to implement dynamic fluid physics into Portal 2.

That would be cool but yeah, I really doubt thats gonna happen. especially in the source engine...

[Moose Muscles]

It would be realistic to expect that

[Swordsman]

Also it's possible on source

http://www.youtube.com/watch?v=YTugi...eature=related
http://www.youtube.com/watch?v=A3fF6...eature=related

dunno if that's the correct video, it doesn't open to me but i saw a hl2 video with dynamic water, i think it's that one

[wade]

Originally Posted by GrownupLawolf

Ever seen the nVidia PhysX demos?
Especially the one with the dynamic fluid physics?
I mean the one which plays at a decent 40FPS?

It shows it's possible. Maybe Valve finds (or has already found) a way to implement dynamic fluid physics into Portal 2.

The demo may run at 40FPS, but keep in mind that your GPU will already have to handle rendering a game on top of that, and that not everyone has a physx gpu. It seems unlikely that dynamic fluids would be made a key gameplay element.

However they still have to put paint through portals somehow, I suppose we'll just have to wait and see what they've done. They may indeed surprise us with something nifty.

I'd like to see them use some of the new Open CL stuff from Havok.

[Moose Muscles]

If your GPU can handle the Hard Rain water from L4D2 you can see that it has already laid some decent foundation. I'm sure that dynamic fluid could make its way here.

But then again: 1) I'm an optimist and 2)I never crudely write anything off until fully proven false.

[JayShadow]

Originally Posted by wade

It seems unlikely that dynamic fluids would be made a key gameplay element.

That pretty much sums it up there. Doesn't matter if something is technically possible on some people's hardware. It would have to be possible on everyone's hardware for something gameplay related to be included.

I assume paint will just be a combination of particle effect and decals. Pretty much the same as TAG but more refined.

[Panikarn]

Originally Posted by Swordsman

Also it's possible on source

http://www.youtube.com/watch?v=YTugi...eature=related
http://www.youtube.com/watch?v=A3fF6...eature=related

dunno if that's the correct video, it doesn't open to me but i saw a hl2 video with dynamic water, i think it's that one

Those are the right vids.

To be honest the fluid doesn't look very realistic though, and looks like utter crap up close. I'd honestly rather have it left out, unless it looks and behaves better.

[Claybay1]

Originally Posted by Swordsman

Also it's possible on source

http://www.youtube.com/watch?v=YTugi...eature=related
http://www.youtube.com/watch?v=A3fF6...eature=related

dunno if that's the correct video, it doesn't open to me but i saw a hl2 video with dynamic water, i think it's that one

But thats a PARTICLE effect and is not real physics.

This probably won't work/happen.

1> Shooting a portal beam into a body of water would scatter the energy. Not to mention energy dissipation in water. Now if we are talking about an empty pool, shoot portal, fill pool, you still have a bunch of technical issues.

2> Said technical issues are based on the dynamics of the water. The spray of water you see is one thing from a dynamic POV. Notice how the water level is not rising as more water is being added into a pool? (as displayed in the youtube video that was linked) You are talking a HUGE amount of code to compensate for the dynamic placement of portals, logic to determine rate of flow and mass of flow depending on the location of a portal in relation to the water.

It's not as easy as it would sound, it's a huge graphical and engine based technology so I wouldn't really count on it.

[Zekiran]

Of course it works.

[wade]

Originally Posted by Claybay1

But thats a PARTICLE effect and is not real physics.

Dynamic water basically amounts to a particle effect. It's like if you have a room full of balls, you just replace the balls with particles and put a dynamic mesh on top to make it look like one body of water. The particles then react to whatever touches them so that objects can displace the water.

So the video is a bit closer than you might think, it's just a bit crude, and lacks the dynamic mesh.