Sorry your browser is not supported!

You are using an outdated browser that does not support modern web technologies, in order to use this site please update to a new browser.

Browsers supported include Chrome, FireFox, Safari, Opera, Internet Explorer 10+ or Microsoft Edge.

Program Announcements / CarLab

Author
Message
Kjelle69
19
Years of Service
User Offline
Joined: 5th Aug 2004
Location: Sweden 150 km north of arctic circle
Posted: 8th Mar 2005 10:29 Edited at: 27th Aug 2005 18:33
Link
A lot of questions about the Newton Game Dynamics system is concerning the VehicleJoint and all possible adjustments therein.

I have made an application which makes it possible to tune car parameters while driving. You can also save a textfile with your adjusted parameters to use in your own application.

When learning how to use the system use the two car and wheelmodels which is included. The default values for the program is tuned in for the fiero.x Car model and the tire.x Wheel model.

One more fun thing is that you can test drive any model you like. Put your own model in the system and try how it handles!

http://mtec.hostname.nu/projects.htm



//Kjelle

-==The tame birds yearn, the wild ones dare to fly.==-
http://Mtec.hostname.nu
Back to top
Profile PM Email Website
Jess T
Retired Moderator
20
Years of Service
User Offline
Joined: 20th Sep 2003
Location: Over There... Kablam!
Posted: 8th Mar 2005 12:47
Link
Wow, real nice !

I haven't tried the Car Physics yet besides the Example by Walaber, but I can see that it is nice and powerfull

Oh, and great work on updating the Newton Wrapper to 1.31, Thank You.

Jess.


Team EOD :: Programmer/All-Round Nice Guy
Aust. Convention!
Back to top
Profile PM Email Website
bitJericho
21
Years of Service
User Offline
Joined: 9th Oct 2002
Location: United States
Posted: 8th Mar 2005 15:03 Edited at: 8th Mar 2005 15:04
Link
unfortunately the sliders are far too touchy

Also the default was far too bouncy and undrivable... Is anyone else noticing that? Or is it just me?O_o

Needs some work yet to be useful, but very cool utility


Yarr join teh New and Improved LoGD!
Back to top
Profile PM Email Website
Kjelle69
19
Years of Service
User Offline
Joined: 5th Aug 2004
Location: Sweden 150 km north of arctic circle
Posted: 9th Mar 2005 00:48 Edited at: 9th Mar 2005 00:50
Link
Hey, Jerico, What system are you running on ? Processor and graphic card ?

I have tried the default Car (The Fiero.x and Tire.x) on four different computers with variuos specs from 2Ghz pentium to 3.4Ghz AMD and it all works rather nice on them. The sliders are there for tuning and I have to change the sensitivity on them, and maybe make them a bit longer for easier use.

One thing you can try is to increase the vehicle weight, that stabilises the system somewhat, also try to change the spring and shock before you test drive the car, but those parameters have a Major impact on the vehicles behaviour.


Ride on !
Back to top
Profile PM Email Website
BatVink
Moderator
21
Years of Service
User Offline
Joined: 4th Apr 2003
Location: Gods own County, UK
Posted: 9th Mar 2005 04:09
Link
What a fantastic idea. Just need to find the time to play now...

BatVink
Back to top
Profile PM Email
Kjelle69
19
Years of Service
User Offline
Joined: 5th Aug 2004
Location: Sweden 150 km north of arctic circle
Posted: 9th Mar 2005 09:17 Edited at: 9th Mar 2005 09:17
Link
Code updated with some more tweaking options.
(1.0b)

http://web.telia.com/~u97007521/CarLab.zip


Back to top
Profile PM Email Website
bitJericho
21
Years of Service
User Offline
Joined: 9th Oct 2002
Location: United States
Posted: 9th Mar 2005 13:14
Link
Quote: "One thing you can try is to increase the vehicle weight, that stabilises the system somewhat, also try to change the spring and shock before you test drive the car, but those parameters have a Major impact on the vehicles behaviour."


Tried all that, didn't work. All the settings I tried were too jittery, or too slippery, or tipsy, etc...

I'm running an

Intel Celeron D 2.26ghz
256mb Ram
Win 2000 pro
Intel Graphic 64mb Integrated card (82865g Graphics Controller)
AOpen AX4SG-UN mobo


Yarr join teh New and Improved LoGD!
Back to top
Profile PM Email Website
Kjelle69
19
Years of Service
User Offline
Joined: 5th Aug 2004
Location: Sweden 150 km north of arctic circle
Posted: 9th Mar 2005 23:07
Link
Have you tried to increase the minimumframerate? Celeron 2.26 should work fine. Strange effect !?

Anyone else out there who have tried it and experience this effect ?
Back to top
Profile PM Email Website
Kjelle69
19
Years of Service
User Offline
Joined: 5th Aug 2004
Location: Sweden 150 km north of arctic circle
Posted: 11th Mar 2005 08:47
Link
I have rewritten the code so that the physics engine is now performing substeps if the framerate gets too low, it should work even on really slow systems now.

Try it if you are interested.

Some new functionality is also added.
Back to top
Profile PM Email Website
BatVink
Moderator
21
Years of Service
User Offline
Joined: 4th Apr 2003
Location: Gods own County, UK
Posted: 11th Mar 2005 17:22
Link
Kjelle, why do you need to manually control substeps? I thought Newton was time-based anyway?

BatVink
Back to top
Profile PM Email
Kjelle69
19
Years of Service
User Offline
Joined: 5th Aug 2004
Location: Sweden 150 km north of arctic circle
Posted: 11th Mar 2005 20:26 Edited at: 11th Mar 2005 20:30
Link
There is a lot of theoretical discussions on that issue here:

http://www.physicsengine.com/forum/viewtopic.php?t=748

http://www.newtondynamics.com/forum/viewtopic.php?t=1051&highlight=timestep


Tomek explains the issue like this in the Newton Forum:
--------------------------------
If you pass more than 1/60sec, then Newton will clamp it to 1/60, so it's first need for your own time-slicer.

Second one is, that normally you want not only to step physics, but also do your own 'thinking'(for example AI), and you either run in at physics rates, or at much lower rates, depending on game genre.

Therefore, you need some kind of 'time-slicer' for the rest of subsystems too.

Besides, if Newton internally slices time period passed, you cannot do anything between iterations...


But of course if you don't mind these constraints you can rely on Newton slicer

--------------------------------



BTW, I have updated the CarLab to version 1.0c with a lot of new functions and also now using the 1.32 version of the Newton system. Should work more stable on Celeron processors due to different compiler optimization.


Back to top
Profile PM Email Website
Back to top

Login to post a reply

Server time is: 2024-06-26 09:56:28
Your offset time is: 2024-06-26 09:56:28