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Control Flow

2 (2.2%)

Arrays, Strings, Pointers, and References

8 (9%)

Functions

4 (4.5%)

Basic object-oriented programming

30 (33.7%)

A bit more advanced OOP (Composition, Operator overloading, Inheritance, Virtual Functions)

18 (20.2%)

Templates

8 (9%)

Other (Explain)

4 (4.5%)

Working with files?  (Streams)

15 (16.9%)

Total Members Voted: 89

[Supermikhail]

I've seen another engine that said that it could make destructible objects from atom-like units with very simple properties. I insist that with atoms and forces it's possible to do molecules without rotation, mass distribution etc.

Addendum: this engine I guess I'd use it, if it were in Java...
Addendum 2: finally glanced under the hood, and... don't quote my post anywhere. Do you need to have inertia separate from velocity?

[Siquo]

Ahh, springy stuff! Can become CPU-costly, but fun. You could make the angle of the bonds a spring as well (so a spring between the two H's of water, making a triangle), and then it becomes a bouncy thingy! That engine sounds like fun, too, can't you just use that?

A springy engine seems hard to build though. Good luck!

[Nadaka]

Inertia will the product of mass and velocity. So if all your masses are identical, it won't matter. Otherwise it will.

for your other question... http://en.wikipedia.org/wiki/Maxwell%E2%80%93Boltzmann_distribution.
Yes, my science focus was on chemistry at university, but I am pretty rusty.

[G-Flex]

Inertia will the product of mass and velocity. So if all your masses are identical, it won't matter. Otherwise it will.

I'm not 100% sure what you mean by this. The product of mass and velocity is momentum, with "inertia" meaning slightly different things depending on what you're talking about.

[Nadaka]

Inertia will the product of mass and velocity. So if all your masses are identical, it won't matter. Otherwise it will.

I'm not 100% sure what you mean by this. The product of mass and velocity is momentum, with "inertia" meaning slightly different things depending on what you're talking about.

Yes. They are different, but the just of what I was saying is that if you don't care about mass, there is no reason to worry about inertia.

[Supermikhail]

@Nadaka: My masses are different. And I take them into account at each step. At least I try to.
I skimmed through the article, and I think I used a similar approach, but without the statistics, and while I haven't tested the results yet, I doubt its usefulness. It involves costly square roots and raising to powers, and I'd either need to set some arbitrary kinetic energy, or recalculate everything in SI, then either multiply everything each step to bring it to a displayable state, or scale the drawn image, and then it turns out that particles zip around at relativistic speeds. I guess the later could be mediated by carefully setting a temperature, but still... er, do you make anything out of all this rambling?

@Siquo: I don't know how to use a C++ library in Java. Do I have to rewrite it for the format?

[Siquo]

No idea, I don't do Java.

Here, I found you something cool:

[Supermikhail]

Eh. I've seen something as cool in a program that my project supervisor (or however people who supervise undergraduate projects are called in your English countries) showed to me. It also had a resizable container, circles could be of different sizes, and it could have a flow. But speed was FPS-dependent. He said "they" (meaning he and somebody else) made it. He sent it to me as a kind of help... but without the source code. And he doesn't seem like a hobby programmer to me. Like at all. I think I either misheard, or it was partly bullshit. Although the program has an about menu, but the program is for Windows (vintage of around 2001), and uses a Cyrillic font, so any info is gibberish currently.

Anyway, slow your picture down a bit, and add user interaction, and you've a prototype for my game.

Why do I keep coming here each 15 minutes in the middle of coding? This is embarrassing.

[Siquo]

Why do I keep coming here each 15 minutes in the middle of coding? This is embarrassing.

I'm working and here, that's even worse.

[eerr]

Code Siquo CODE.

[Siquo]

Meh, I just do nothing for a while, then CODE LIKE THERE'S NO TOMORROW and then go back to doing nothing again (aka "thinking about the subject"). I'm still the fastest of our 7 devs.

[eerr]

Hey you aren't supposed to be-

oh nevermind, thats fine.

[IHateOutside]

I bet hes taking a break whilst his code's compiling (http://xkcd.com/303/) 

[Siquo]

I remember (13 yrs ago or something) when I used to make excel macros at a job I had. Sitting outside smoking, and I just had to point at the PC which was very obviously being very busy calculating all kinds of important numbers

[Blank Expression]

I wish I could get one for free. The library I've been talking about is this. And I'm not so sure it was made by any degree coders, judging by the amount of todo's, and the inclusion of elastic joints which "do something odd. Might be useful for something?" It's been last updated in 2008. I've looked and haven't found a better physics library, at least in Java. And for 2D...

Jesus christ, that's Java 1.4. It's fuck-ancient. You can do better than that.

http://www.jbox2d.org/ - same source material as Phys2D (it's a Box2D port). I use Box2D for a number of small sims/trial projects; I do mine in .NET for the most part, but anybody moderately recent who inherits from the Box2D framework is probably in good shape.
http://jbullet.advel.cz/ - JBullet is almost certainly way more than you need, but if you want something designed by top-shelf devs, the Bullet system is where you go. (Bullet was developed by Havok refugees.)