[FIXED][1.9.4] +inf inertia make the object disappearing !

[Thooto]

Edit: (by Electroniboy on 22.7.2011 15:58)
Bug fixed in 1.9.8b as said by Emil

-Electroniboy
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Hey, I related a bug in the 1.9.4 beta.

When you spawn a box with a +inf inertiamultiplier, this object disappears ! Embarrassing...

[Someone Else]

I found that does not always happen, and it also happens when you set inertiaMultiplier to +inf in the script menu.

[TC42]

Hey, I related a bug in the 1.9.4 beta.

When you spawn a box with a +inf inertiamultiplier, this object disappears ! Embarrassing...

Happens in 1.8.5 too. Use 3e+008 instead of +inf, at least when you're spawning. Otherwise, +inf or -inf should work fine.

[Thooto]

I didn't know that this bug happened in 1.8.5 version too.

[Someone Else]

Neither did I. And I can never recall spawning something with really big inertiaMultiplier.

But this should be fixed.

[Chronos]

I don't see how this is a bug at all. If anything, the ability to make objects not rotate with +inf inertiaMultiplier is a bug. How is that realistic at all? I say this should be left alone.

[Someone Else]

One of the greatest advancements from Phun to Algodoo, if I remember correctly, was the ability to use inertiaMultiplier to prevent something from rotating. The other was density = 0. The third was lasers.

If inertiaMultiplier was a bug, then why did Algoryx implement it in the first place? It's an Easter egg, nothing more or less than negative air friction, negative-damping springs, and Thymed lasers. The last of which, we can be certain, was entirely deliberate.

[Chronos]

They implemented it for doing what it was made to do, not for making things never rotate. I don't see why a physics simulator would have something so unrealistic on purpose.

[TC42]

So what exactly does it do, O Fountain of Great Knowledge?
I've never seen a natural instance of it not being 1.

[Thooto]

They implemented it for doing what it was made to do, not for making things never rotate. I don't see why a physics simulator would have something so unrealistic on purpose.

If there is an option that can let us change the inertia of an object, why could we not change it to + inf, if there is the possibility?

[Chronos]

So what exactly does it do, O Fountain of Great Knowledge?
I've never seen a natural instance of it not being 1.

Well then change it and see.

They implemented it for doing what it was made to do, not for making things never rotate. I don't see why a physics simulator would have something so unrealistic on purpose.

If there is an option that can let us change the inertia of an object, why could we not change it to + inf, if there is the possibility?

Nothing in real life is ever truly infinite. I say that +inf should only be allowed for special occasions, otherwise it gives an error and reverts it to the previous value.

[TC42]

So what exactly does it do, O Fountain of Great Knowledge?
I've never seen a natural instance of it not being 1.

Well then change it and see.

No, I meant in the sim, without a user changing it. Is it ever natively not 1? How is it used in the algorithms of algodoo? Because when it is changed, it doesn't affect anything except rotation...

[Someone Else]

I thought by "natural", you meant in real life.

They implemented it for doing what it was made to do, not for making things never rotate. I don't see why a physics simulator would have something so unrealistic on purpose.

Which is... ?
Ever heard of this funny little thing called Thyme?

[Chronos]

So what exactly does it do, O Fountain of Great Knowledge?
I've never seen a natural instance of it not being 1.

Well then change it and see.

No, I meant in the sim, without a user changing it. Is it ever natively not 1? How is it used in the algorithms of algodoo? Because when it is changed, it doesn't affect anything except rotation...

Exactly. It was implemented to make things rotate, not to make it not rotate.

I thought by "natural", you meant in real life.

They implemented it for doing what it was made to do, not for making things never rotate. I don't see why a physics simulator would have something so unrealistic on purpose.

Which is... ?
Ever heard of this funny little thing called Thyme?

Now, see, the thing with Thyme is, I really don't like using it for unrealistic purposes. I prefer to think of it as a form of electricity, and it can control hydraulics, motors, engines, all sorts of stuff. While making something perfectly stable is physically impossible. That's what I mean.

[Someone Else]

Ask one of the developers.

[TC42]

While making something perfectly stable is physically impossible. That's what I mean.

You can come pretty darn close with a gyroscope or using balancing algorithms like those that power a segway.
And, as SE pointed out, there are a lot of things that shouldn't be possible in algodoo, but are. Such as +inf friction, materialvelocity, variable laser speed, ect.

[Someone Else]

Good point.

[Chronos]

Now, see, I accept that stuff being in, and I actually like it, but only for background and aesthetic purposes. As for gyroscopes, it's still impossible to keep something straight when an almost infinite force is being applied to it.

[Someone Else]

If it makes you any happier, one of the billion bugs in 1.9.4 is materialVelocity. It simply does not work. Download any scene using it and you'll see.

[tatt61880]

Not fixed with v1.9.7b

[emilk]

Will be fixed in 1.9.8b