free 2d box rigid body demo for delphi!

[fire.tiger]

thanks a lot. it works fine now.

btw. very very nice piece of code...and dynamics simulation look
very nice.

btw2. do you think it would be hard to translate 2d algorithm to 3d ??
using opengl...

[JernejL]

thanks a lot. it works fine now.

btw. very very nice piece of code...and dynamics simulation look
very nice.

btw2. do you think it would be hard to translate 2d algorithm to 3d ??
using opengl...

nice that you find it useful, i paid 40 € to translate it to pascal when i thought my game will use it, but i switched to newton physics engine later

i'm not sure if it would be hard to make it work in 3D, but i would recommend you look into Newton dynamics for 3D simulation first, it is very nice - www.physicsengine.com .

[fire.tiger]

You paid 40 pounds to translate it from C to Pascal ? Really ?
Who did it, some company or person ?
I know newton engine...but it requires DLL that has to be distributed
with final EXE file...I prefer complete control in source code...
something like Unit...
But that code could be very good base for additional edits,
and improvements to make own physics engine..
how many physics engines do you know ?? I know just ODE and
Newton .. and commercial Havok...do you any other free or commercial ?

[JernejL]

You paid 40 pounds to translate it from C to Pascal ? Really ?
Who did it, some company or person ?
I know newton engine...but it requires DLL that has to be distributed
with final EXE file...I prefer complete control in source code...
something like Unit...
But that code could be very good base for additional edits,
and improvements to make own physics engine..
how many physics engines do you know ?? I know just ODE and
Newton .. and commercial Havok...do you any other free or commercial ?

yeah, it was translated by lee_nover on our local delphi website - delphi-si.com. he also gives answers on experts-exchange.

newton can be binded into the exe using some library that i found on the internet, can't remember what it is called, people on newton forum should know.

i've tried several new physics, newton, true-axis, ode, and so far newton won in almost every aspect, and it is totally free.

[fire.tiger]

So it is very nice that you add it here for free..if you paid 40 pounds..
I should say thank you, so Thank you .-)

So, newton DLL can be binded into EXE and nobody shouldn't know that it uses DLL newton ? But how about licensing..if we speak about commercial
projects?

Also, in which point do you think commercial physics engines are better than free engines ? for example what has Havok better than Newton ?

Also, do you know any fluid physics engines in pascal ?
or any algorithm about fluid or hydrodynamics...?

[JernejL]

So it is very nice that you add it here for free..if you paid 40 pounds..
I should say thank you, so Thank you .-)

So, newton DLL can be binded into EXE and nobody shouldn't know that it uses DLL newton ? But how about licensing..if we speak about commercial
projects?

Also, in which point do you think commercial physics engines are better than free engines ? for example what has Havok better than Newton ?

Also, do you know any fluid physics engines in pascal ?
or any algorithm about fluid or hydrodynamics...?

here is the dll inside exe project:
http://www.basegraph.com/bg/tutorial.../dlltools.html

newton is one of rare free dynamic engines, which is also free for commercial use, but it is closed source, which should not be a problem imo, it has very free usage license.

havok, hmm.. no idea what could it have better, it might be faster, but i'd guess newton would beat it in precision, also, it is worth mentioning that newton is so stable, that it is using euler integrator internally (believe it or not), while other engines would explode if they used euler.

i am not aware of any fluid physics simulations done in pascal, newton however has fluid simulation.

if you are interested into pascal & pascal physics engines, you may want to check out MPL licensed PAPPE (PAscal Powerful Physics Engine):
http://bero.0ok.de/blog/projects/pap...hysics-engine/

and TSS game (entire gta-like 3D game built with delphi, including own physics engine):
http://www.gtatools.com/tss/

[fire.tiger]

That newton seems very interesting...

I've already found fluid mechanics source, but in C,
it wouldn't be problem for me to translate, but it uses
fast fourier transformations (fftw) in C, and this is rather .. well,
problem for me however it is algorithm that is base for such a
advanced fluid mechanics that is in Maya (Maya Fluid) if you know....

But I understand that hydrodynamics is very hard..I read that equations
of fluid mechanics were solved for almost fifty years...

I'm very interested in all kind of physics in computers..it's just a pitty that
I don't control advanced mathematics... that is so important for this kind of coding...

PAPPE is your pascal physics engine ? I've looked into link and tried
to download it via sourceforge, but sourceforge has written that there are no files...or something like that.

btw. what kind of fluid physics has newton ?

[JernejL]

[quote="fire.tiger"]That newton seems very interesting...

I've already found fluid mechanics source, but in C,
it wouldn't be problem for me to translate, but it uses
fast fourier transformations (fftw) in C, and this is rather .. well,
problem for me however it is algorithm that is base for such a
advanced fluid mechanics that is in Maya (Maya Fluid) if you know....

But I understand that hydrodynamics is very hard..I read that equations
of fluid mechanics were solved for almost fifty years...

I'm very interested in all kind of physics in computers..it's just a pitty that
I don't control advanced mathematics... that is so important for this kind of coding...

PAPPE is your pascal physics engine ? I've looked into ]

no, pappe is not my work, i just stumbled upon it a while ago.

Oh, you are into actual liquid simulation? i'm not sure exactly what i could suggest you, as that is not really a popular area for game simulation. ODE and newton both support simple water plane with buoyancy, but no actual fluid dynamics.

i know for one thing, that novodex / aegia supported some fluid dynamics, not sure what happened to that.

[fire.tiger]

Yes, I'm interested in precision physics computing...dynamics, simulations etc. If I'll translate that C source of fluid mechanics (under opengl) I'll give you info..but it is hard work..exactly fast fourier transformation...

also, do you know any good renderers ? radiosity / global illumination / photon mapping...with source ?

[JernejL]

Yes, I'm interested in precision physics computing...dynamics, simulations etc. If I'll translate that C source of fluid mechanics (under opengl) I'll give you info..but it is hard work..exactly fast fourier transformation...

also, do you know any good renderers ? radiosity / global illumination / photon mapping...with source ?

hmm, not sure.. tried glscene?