The Twilight Zone - Now with VIDEOS!

[kennythebomb]

Stupid me... came in with my Minolta on the 3rd try, but I came out accidentally while driving around.

I guess I'll just hop in the Spec-C and go

Hehe

The first time, I kept going straight, and kept going through the stairs and all and right over the wall and back onto the track

 

[slo-car]

Yes, I made it



I have more, but I'm too lazy to upload.

 

[mroelandts]

can the twilight zone be reached on other tracks?

 

[kennythebomb]

can the twilight zone be reached on other tracks?

I imagine so, I just haven't found any other portals yet.

I've heard a rumor of Seattle? But not sure, haven't seen any proof.

 

[thebigmacmoomin]

I imagine so, I just haven't found any other portals yet.

I've heard a rumor of Seattle? But not sure, haven't seen any proof.

i have done it at seattle. got stuck in the wall tho. will post pics soon

 

[300zxfairman]

cool glitch it did the same in GT3

 

[300zxfairman]

Whta part to you hit?Do you hit the white tires or the railing?

 

[Thirdeye]

Yesssss! Finally got it

 

[Thirdeye]

I hit a bump and it spun me for hundreds of feet back onto the track

 

[300zxfairman]

What spot did you hit?

 

[chinko]

ive done it twice. the third, fourth, fifth, six hundreth time it just bounced off

 

[Thirdeye]

Whta part to you hit?Do you hit the white tires or the railing?

Here's where I hit to get thru: I just nailed the corner and it went thru, I was going as fast as I could, so i'm guessing speed plays a large factor in making it.

 

[300zxfairman]

ive done it twice. the third, fourth, fifth, six hundreth time it just bounced off

same here!!!!!!!!!!!!!!!!! 🤬

 

[chinko]

same here!!!!!!!!!!!!!!!!! 🤬

its like i can do it twice then it stops me from doing it. it also registered a 1:50.xxx second laptime while i was in there. which was odd... (i cant give you proof as i got rid of the laptime)

 

[kennythebomb]

i have done it at seattle. got stuck in the wall tho. will post pics soon

Awesome, I'm very curious.

Which part of Seattle?

 

[thebigmacmoomin]

Awesome, I'm very curious.

Which part of Seattle?

the first corner on the reverse track where you go under the bridge. hit the wall/ barrier to the right of the nismo sign

 

[300zxfairman]

its like i can do it twice then it stops me from doing it. it also registered a 1:50.xxx second laptime while i was in there. which was odd... (i cant give you proof as i got rid of the laptime)

I did it once yesterday I was going so fast off track the car went right on track again. I kept trying but all I got was this

 

[kennythebomb]

the first corner on the reverse track where you go under the bridge. hit the wall/ barrier to the right of the nismo sign

Thanks, I'll try it!

 

[R5Turbo2]

Here's where I hit to get thru: I just nailed the corner and it went thru, I was going as fast as I could, so i'm guessing speed plays a large factor in making it.

Yes speed is needed, but not only. This happens when the collision detection algorithm misses the fact that the bounding box, that is around your car, crossed the polygons that are used to set the track limits.

So you have to be close enough at some given algorithm run so that it does not bounce your car because you are not touching the limits (or not close enough to be considered as touching), and fast enough so that the next time the algorithm runs your speed sent you on the other side of the limit, and thus you're not bounced either.

You've discovered the nightmares of rigid bodies collision detection, or the joys of doing physics modeling.

PhM

 

[kennythebomb]

Yes speed is needed, but not only. This happens when the collision detection algorithm misses the fact that the bounding box, that is around your car, crossed the polygons that are used to set the track limits.

So you have to be close enough at some given algorithm run so that it does not bounce your car because you are not touching the limits (or not close enough to be considered as touching), and fast enough so that the next time the algorithm runs your speed sent you on the other side of the limit, and thus you're not bounced either.

You've discovered the nightmares of rigid bodies collision detection, or the joys of doing physics modeling.

PhM

Wow, I didn't know the physics behind it or how it worked at all. Thanks for the explanation. So even if your speed and trajectory are correct, it won't work every time because it works on a timed sequence!

So - this means that with the increased power of the PS3, GT5 probably won't have this 'problem' at all....

 

[VTRacing]

KTB 👍

It's good to see you can have fun with GT4 without actually racing. As someone else mentioned above, you can turn a racing sim into an adventure game.

Good work with the photos too.

 

[R5Turbo2]

Wow, I didn't know the physics behind it or how it worked at all. Thanks for the explanation. So even if your speed and trajectory are correct, it won't work every time because it works on a timed sequence!

Exactly, most of the time the physics engine gets to run at fixed intervals, so you have to be right there right when the engine is going to run. The way collision detection is done is also playing a role in this. Let's say if the car is found to be behind the limit, the physics engine could 'run time backwards' and try to figure out when and where the collision actualy occured, put your car back to this position and bounce it.

So - this means that with the increased power of the PS3, GT5 probably won't have this 'problem' at all....

Well I would say this 'problem' will probably be nearly impossible to come across but not eliminated. It's all about how fast the physics engine is running, and how precise the collision detection is. I think that the physics engine we developed for VRally3 was running at something around 5ms (If my memory is ok).

The PS3 will make things easier as you will have several processors (let's say 8 SPEs), let's imagine how we could use these SPEs :

- A couple of them will most probably be in charge of the 3D pipeline (let's say 3).
- Another could be doing all the DSP work for the sound.
- Another one could be in charge of keeping the DVD busy streaming data.
- Let's use one for all the I/O things (USB, network, whatever,...)

So we end up having 2 SPEs left in this example, that could be doing the physics. And the main PPC processor would still be available for some jobs, and would be sending command packets to these SPEs, making sure everyone is busy.

On the X360 things would not be implemented this way as the machine architecture is completely different. Welcome to the world of the video games programmers!


You can find some info here (you may have to create a gamasutra account, it's free) :

Collision detection :
http://www.gamasutra.com/features/19991018/Gomez_1.htm

Boundary boxes :
http://www.gamasutra.com/features/20000203/lander_01.htm

A book about all this :


Info about the PS3 processor :
http://www.anandtech.com/cpuchipsets/showdoc.aspx?i=2379&p=3


PhM

 

[STINGER05]

Nice one Kenny! Worked in just my third attempt! Parked my car on the front deck of one of the yachts afterwards, completly Monaco style!

Now in search of other 'twilight zones', but no luck so far at Amalfi, Suzuka and the Ring...but think the city courses might be best fo that (New York next on my list...)

 

[kennythebomb]

Thansk guys for the props. Yeah I've been in search of others, too. Trying the Seattle one right now.

R5Turbo2, thank you for the detailed info!

My dad and I are thinking that this is probably possible at any 90 degree angle by two walls....

 

[mrplo]

I tried about 50 times. 20 with the escudo, 30 with the minolta. I tuned them to get the very most out of the motor. Just hit the wall at 270 km/h and just bounce away and cause severe tyre spin.

There must be something i'm doing wrong:

1. I go to my garage and get my minolta (which is the fastest car I have).
2. I take it to the track, via city courses.
3. I drive down the track untill I reach the corner before the tunnel.
4. I floor it. As fast as I can possibly go, I hug the inside of the track, no sparks appear.
5. I hit the wall. Hard. I just roll backwards after hitting a tyre barrier at 270km/h. Now i'm mad.
6. I drive back to the corner again, and repeat. And crash. And repeat. And crash.

No prevail. WHAT AM I DOING WRONG?? Will it only work on stock cars?? Do I need NOS??

Or am I doing nothing wrong and just impatient.

 

[kennythebomb]

I tried about 50 times. 20 with the escudo, 30 with the minolta. I tuned them to get the very most out of the motor. Just hit the wall at 270 km/h and just bounce away and cause severe tyre spin.

There must be something i'm doing wrong:

1. I go to my garage and get my minolta (which is the fastest car I have).
2. I take it to the track, via city courses.
3. I drive down the track untill I reach the corner before the tunnel.
4. I floor it. As fast as I can possibly go, I hug the inside of the track, no sparks appear.
5. I hit the wall. Hard. I just roll backwards after hitting a tyre barrier at 270km/h. Now i'm mad.
6. I drive back to the corner again, and repeat. And crash. And repeat. And crash.

No prevail. WHAT AM I DOING WRONG?? Will it only work on stock cars?? Do I need NOS??

Or am I doing nothing wrong and just impatient.

That was my exact predicament right now on Seattle....I could NOT get it to work! Black GT1, F1, Escudo....nothing worked

 

[ving]

you guys!

 

[thebigmacmoomin]

MONACO:


SEATTLE:
This is as far as i could get. I didnt hit the wall in the correct place

 

[kennythebomb]

SEATTLE:
This is as far as i could get. I didnt hit the wall in the correct place

Interesting, thanks for the pictures.

It's pretty useless if the best we can do is get stuck in the wall, perhaps this wall is too thick. I'll give it some more tries, though.

 

[kennythebomb]

Still can't get in there.

Anybody have any other tracks to try?