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Author Topic: BMW M3 package with improved physics  (Read 23659 times)

giucam

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BMW M3 package with improved physics
« on: November 26, 2012, 06:18:20 am »

Finally today I can release the first version of the BMW posted by cameni here with the engine script I made and engine sounds.

Latest version here!

It has 5+1 gears, with automatic transmission, a torque curve based on real data and engine brakeing.
The support for all these things is there but it needs tuning, so if anyone has the real one, his/her comments are welcome :)
It does 0-100 km/h in roughly 4-5 seconds and a maximum speed of ~250 km/h I think.

Internal view:


External view:


Other screenshots here



Download it from here and unpack the archive in your packages folder. Then spawn it from the Buildings (F7) dialog, selecting giucam/bmwM3/bmwM3. Hope you'll enjoy it!
Any comment is welcome :)

Credits:
  • Amit Chippa for the model;
  • Cameni for the first vehicle import from which I took off (and for Outerra ;));
  • DucFreak for the engine sounds. (http://www.gtlw.co.uk/)
« Last Edit: July 05, 2013, 12:45:37 pm by giucam »
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cameni

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Re: BMW M3 package with improved physics
« Reply #1 on: November 26, 2012, 06:21:03 am »

Thanks, nice work!
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Chaoz

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Re: BMW M3 package with improved physics
« Reply #2 on: November 26, 2012, 08:46:38 am »

very nice indeed!
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ZeosPantera

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Re: BMW M3 package with improved physics
« Reply #3 on: November 26, 2012, 03:21:41 pm »

Damn this netbook and its lacking outerra install or ability to run it at all.
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giucam

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Re: BMW M3 package with improved physics
« Reply #4 on: November 26, 2012, 04:51:44 pm »

Steering at high speeds behaves oddly. I think i need to fiddle with the values returned by init_chassis(). Unfortunately it's really hard to test it with all the driver crashes i'm getting  >:(
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giucam

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Re: BMW M3 package with improved physics
« Reply #5 on: November 27, 2012, 10:22:35 am »

After deeper thoughts i think the current vehicle physics model handles high speed turning the same as low speed turning. Is that right?

p.s.: i found an easy yet interesting article on car physics simulation: http://www.asawicki.info/Mirror/Car%20Physics%20for%20Games/Car%20Physics%20for%20Games.html
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cameni

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Re: BMW M3 package with improved physics
« Reply #6 on: November 27, 2012, 10:45:23 am »

You have got a very high slip (friction) coefficient there, 40.2 sticks it to the road.
The tire model is quite simple at the moment, but it computes lateral and longitudinal slip and applies the resulting forces on the wheel. Sideways friction is set 2x higher than forward, I think.
I would like to expose this computation into script (as optional) so that someone could toy with it.
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Sam

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Re: BMW M3 package with improved physics
« Reply #7 on: November 27, 2012, 11:25:23 am »

 :-[ Sorry about my laymen question, but how can I activate that BMW into my Outerra dev version? With the assistance of the importer or just drag and drop into the packages folder? Because it does not work with drag and drop the downloaded folder into the packages folder.  :-\
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cameni

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Re: BMW M3 package with improved physics
« Reply #8 on: November 27, 2012, 11:42:14 am »

Just putting it into the packages folder (in data). Then it should appear in F7 window as giucam/bmwM3/bmwM3
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giucam

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Re: BMW M3 package with improved physics
« Reply #9 on: November 27, 2012, 11:51:59 am »

You have got a very high slip (friction) coefficient there, 40.2 sticks it to the road.

I modified some values and i think i got a slightly better setup, but still not comfortable. And that's much more visible with a wheel instead of the keyboard: a really slight turn of the wheel makes the car turn really sharp at high speeds.
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Sam

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Re: BMW M3 package with improved physics
« Reply #10 on: November 27, 2012, 01:01:53 pm »

Just putting it into the packages folder (in data). Then it should appear in F7 window as giucam/bmwM3/bmwM3
Ahh, that's the point. Thank you cameni.  :)
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Sam

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Re: BMW M3 package with improved physics
« Reply #11 on: November 28, 2012, 02:14:57 pm »

Just putting it into the packages folder (in data). Then it should appear in F7 window as giucam/bmwM3/bmwM3
No, does not yet working. There are no packages folder in the data folder (there are just the earth folder) The packages folder are in the Anteworld main folder.  :-\

Edit:
Now it works.  :) Sorry, my mistake.  ;)
« Last Edit: November 28, 2012, 02:38:13 pm by Sam »
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ZeosPantera

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Re: BMW M3 package with improved physics
« Reply #12 on: November 28, 2012, 02:38:51 pm »

i found an easy yet interesting article on car physics simulation: http://www.asawicki.info/Mirror/Car%20Physics%20for%20Games/Car%20Physics%20for%20Games.html

A .info site with information on it? NOT POSSIBLE!! Also a very nice writeup.
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Foxiol

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Re: BMW M3 package with improved physics
« Reply #13 on: December 05, 2012, 07:30:45 am »

Thank you very much. Average users like me (I mean, I don´t have a clue in how to do code stuff or anything related) are waiting for some people like you to have more fun in Anteworld while testing every aspect of it.

I know it is hard to make 3D models and then put all together to make it work but it will be great if more people share not only the models but the physics so we can use them in-game. Again people like me that support this but like a mere "tester" of everything.

So thank you again, at least now the game feels like a GTA with the BMW in motion. haha ;)

 
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Unsurt

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Re: BMW M3 package with improved physics
« Reply #14 on: April 02, 2013, 10:57:57 am »

Thank you  ;)
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