Basic flaw in the physics

  • Thread starter Thread starter badger_mk2
  • 85 comments
  • 4,630 views
OPs problem is not a physics glitch.

Parking your car on the banks at Daytona and watching it slide down sideways, that's a glitch.
 
II-zOoLoGy-II
When you go down a hill you pick up speed, when you go up you should lose speed. Is there anything else we are missing?
Click to expand...

Yes, I gained 3mph, physics such as friction means this should NOT happen, the car should have slowly lost speed, it cannot go forever at 8mph (the idle is 4mph).

So if it came down to 4mph, thats fine, but it gained speed.
 
badger_mk2
I didnt say that? :/ I said not touching anything ie. the controller.
Sorry if I worded it weird.
Click to expand...

Then your idling, how is that hard to understand? Your car is always in drive so it will always move forward, like in real life. Youtube it or something.
 
II-zOoLoGy-II
When you go down a hill you pick up speed, when you go up you should lose speed. Is there anything else we are missing?
Click to expand...

Probably the part where "it sounds like" it maintained 8mph regardless of going down or up the incline rather than actually speeding up and slowing down. At least that's what I'm inferring...but could be wrong.
 
The_Reformed
Then your idling, how is that hard to understand? Your car is always in drive so it will always move forward, like in real life. Youtube it or something.
Click to expand...

Have you read through this thread?

As I said after everyone kept bitching about the idle I had a look, its 4mph.

That still doesnt mean my point about the physics isnt wrong if you look about 3 posts up...
 
freedomweasel
So.. what part of the posts did you miss where we explained, in rational terms, that this was possible in real life, and that we had done it, in real life?
Click to expand...

And what part of the posts where people said they had done this in real life and it had stalled did YOU miss?
 
rileyra
Probably the part where "it sounds like" it maintained 8mph regardless of going down or up the incline rather than actually speeding up and slowing down. At least that's what I'm inferring...but could be wrong.
Click to expand...

It's a confusing argument we are having. lol
 
The_Reformed
It's a confusing argument we are having. lol
Click to expand...

I know right. But it could have easily just been a discussion about physics rather than a bitchfest because some people cannot control the urge to insult others' knowledge before taking the entire situation into account.
 
Im going to try and make this clear

There is a hill, i was driving in circles on said hill in my car, Gallardo.

(Technical note: The Gallardo idles at 4mph)

While driving in circles on the hill (read: remaing on tarmac, not touching grass. Nor climbing or descending) the car picked up speed.

The car entered the turn at 8mph, at its slowest point it remained at 8mph.

2 mins later, at the slowest point it had gained 3mph and was now at 11mph and its slowest point.

If you can do this in your car IRL without touching the gas, you sir have proven physics wrong.
 
Destinkeys
And what part of the posts where people said they had done this in real life and it had stalled did YOU miss?
Click to expand...

At this point, I don't even know what the OP is questioning as I'm not following his explanation.

Beyond that, I can, and have taken cars (auto, semi-auto, and manual) and accelerated from a stop with zero throttle input.


badger_mk2
Im going to try and make this clear

There is a hill, i was driving in circles on said hill in my car, Gallardo.

(Technical note: The Gallardo idles at 4mph)

While driving in circles on the hill (read: remaing on tarmac, not touching grass. Nor climbing or descending) the car picked up speed.

The car entered the turn at 8mph, at its slowest point it remained at 8mph.

2 mins later, at the slowest point it had gained 3mph and was now at 11mph and its slowest point.

If you can do this in your car IRL without touching the gas, you sir have proven physics wrong.
Click to expand...
Thanks for further explanation, but I still don't understand how you can "go in circles" on a hill, without climbing or descending.

If you're just doing doughnuts at a super low speed with no throttle input, you shouldn't be gaining speed over time on any surface. If that's what you're experiencing, then unless I'm missing something, then yes, that would be a problem.
 
freedomweasel
At this point, I don't even know what the OP is questioning as I'm not following his explanation.

Beyond that, I can, and have taken cars (auto, semi-auto, and manual) and accelerated from a stop with zero throttle input.
Click to expand...

Im aware you can do this, I have been taught to drive with only a clutch. That is not the point I am making, that is the point everyone else made.
 
badger_mk2
Have you read through this thread?

As I said after everyone kept bitching about the idle I had a look, its 4mph.

That still doesnt mean my point about the physics isnt wrong if you look about 3 posts up...
Click to expand...

Your car doesn't idle at the same rate all the time, you need to clarify what your doing, you said you tried it again or something, but you never explained the way you did this, like are you going up or down a slope. and none of the track are perfectly flat surfaces. So you should have fluctuations in speeds if you leave it on long enough.
 
The_Reformed
Your car doesn't idle at the same rate all the time, you need to clarify what your doing, you said you tried it again or something, but you never explained the way you did this, like are you going up or down a slope. and none of the track are perfectly flat surfaces. So you should have fluctuations in speeds if you leave it on long enough.
Click to expand...

When testing the idle I used a flat section of the track, it sat at a steady 4mph.

The circles were however on a hill.
 
I assume you were in the same gear for both tests?

I wonder if it's related to the weird way the rev limiter kicks in at speed. Take an under-geared car (e.g. any old muscle car) and approach top speed in top gear. Try this: first, keep the throttle nailed and see what your maximum speed is. Then try lifting slightly as you approach that previously indicated maximum speed. You'll sail right past it by 2-3 mph at least. It's also affected by the gradient, so your speed down hills will be higher before the rev-limiter kicks in (which should occur at the same engine speed, regardless), even on shallow declines. I haven't been in the fortunate position to do such a top speed test in real life, however.

It's like the drivetrain is elastic...


Maybe this is somehow related, in that the drivetrain "winds-up" (somewhat excessively...) due to the differential load on the tyres whilst turning, causing the effective idle speed to be higher at the wheels (in the same way the effective rev-limit speed can be higher, as above).
 
badger_mk2
Thats the point I tried to make 3 pages ago xD
Click to expand...

There could be an explanation besides glitch, but I couldn't explain without making a video, but I can tell you there is no way the game would be that close to realism. But I'll try. If you car is off and in park on a gravel surface. (Note lets say you can move the steering wheel freely) If you turn the wheel far enough, and fast enough back and forth the car will inch forward. Now since your already moving ( I know you had the controller down) but maybe the drive always turns the wheel into controller slightly and the game game tries to keep him going straight cause you never told him to turn. that small amount of momentum recover could help. But like I said there is no way that is possible, but you sir found a glitch that is probably in every racing game lol.👍
Sorry if you don't understand what I said, like I said a video would help. I'll go and look
 
badger_mk2
The 'glitch' its not really a glitch though, and the idle test were done in the same run, nothing changed.
Click to expand...

Like I said in my long pointless post every racing has that problem, and it doesn't effect physics at high speed since the cars was probably tested more at higher speeds.
 
Yeh but conservation of speed is a crucial thing to implement correctly in a racing game.

I doubt it makes much difference in the game, and I didnt expect a 3 page thread of people calling each other out xD

Oh well im back off the photomode forums and minecraft then...
 
Perhaps the op's car is getting lighter from the burning off of the fuel. The tires also can be getting out of their graining phase and the engine can be showing its signs of breaking in combine all that with the change of elevation and air density. It really isn't out of the relm of GT5 that his Gallardo is turning into a Redbull (they are both bulls).
 
The hill make no difference. When idling you will go fast in circles than down the straight. I have no doubt GT5 physics just like every sim (including flight sims) has weak areas. It probably has something to do how GT5 engine handles the differential.
 
Last edited:
slower than bob
Not many cars will IDLE up a hill unless it is a VERY gradual slope. Certainly not a Gallardo.
Click to expand...

To add to that it's a supercar so i'm guessing the flywheel is light (needs more rpm to engage without engine stalling) and torque at idle is very low for a car with that much power.
 
Zoom!Zoom!
I have no doubt GT5 physics just like every sim (including flight sims) has weak areas.
Click to expand...

You realize this is heresy? They have piles of wood in the Lobby for guys that say stuff like this..! :sly:

How are people supposed to accept this poorly executed game if they have to admit that the physics has issues? Don't take off their rose-colored glasses, that's just mean... :crazy:
 

Latest Posts

Back