View Full Version : Accurate Simulation for Accident recreation

08-23-2010, 11:04 AM
My question is, cam lightwave's physics engine be used to accurately recreate a car accident.I want to be able to input weight, velocity at specific times and have a real world accurate result similar to a simulator that an engineer would use. If so could someone point me in the right direction?

08-23-2010, 01:00 PM
Not really, you can't put car weight and get exact deformations if that's what you think. LW do have dynamics/effects but not THAT detail/realistic. Although in LW you can model you detail model for simulations ;).

08-23-2010, 01:22 PM
Thank you for your help, do you know of a program that could help me and be compatible with lightwave import/export wise?

08-23-2010, 01:41 PM
I don't think there's a of the shelve program that simulates dynamics with correct deformations. What you are trying to accomplish isn't easy. You have to be able to assign weight to particular parts of the car and that's very important to get realistic results. I don't think that there are a lot of dynamic engines that support that kind of complexity.

08-23-2010, 02:44 PM

08-23-2010, 04:08 PM
If you are a coder you can easily write a plugin to do the sim's. But as stated there is alot missing from every app if you want to create a true, accurate simulation. Houdini puts you the closest to doing it with out having to start coding a bunch of calcs from scratch.

Simulations are very tricky and complicated issues to deal with and most of the time one will create a model of a specific situation, then a new model for another simulation. The coding of such is very math based, complicated, often requires systems more powerful then your average laptop/desktop, and if you find a package to do a true simulation in a wide area of research then it will either be University Based and then OS or it will be freakenly scary expensive.

However if you are just doing a recreation of an accident where in you don't need 100% (not that 100% accurate sims of any kind really exist but thats a different story for a different day) scientific accuracy bit just displaying what happened in an accident then yes LW can be used to create recreations such as those used in forensics and court displays.

Mr Rid
08-23-2010, 06:06 PM
not in LW.

Some interesting vehicle dynamics tools-
Reactor - http://www.youtube.com/watch?v=ccYTewFVTAU&feature=PlayList&p=571F63D412034686&playnext_from=PL&index=1

Craft Director Studio -
presentation - http://www.youtube.com/watch?v=FjY8F6QfVaw
dune buggy - http://www.youtube.com/watch?v=L8tLGgx-kJo

The only dynamics software I have seen that will fragment with flexing materials is Extreme Loading, which is currently only available as a service-

08-24-2010, 07:43 AM
All of you have been very helpful. That reactor and craft plugins were very cool. I was looking for a plugin that would allow me to enter velocity and weight for the vehicles, would the bullet engine in lightwave core help? Maybe Max is the answer?

04-25-2011, 05:17 PM
Does any one know of a plugin that can use velocity or speed as an input to create key frames. Example. At the start point the vehicle is traveling 100 MPH and at the end point it's traveling 79 MPH. Is there something that I can just plug those numbers into and it'll generate the proper motion for the speed?

04-26-2011, 03:23 AM
hunter my showspeed script shows the speed of an item in the viewport. might help you

04-26-2011, 09:10 AM
hunter my showspeed script shows the speed of an item in the viewport. might help you

That might help. I'm getting a 404 not found for it though. Is it part of vehicle rigger cause we have that. Great thing that, by the way. :thumbsup:

04-26-2011, 10:34 AM
anybody mention Blenders awesome physics Engine ?

04-26-2011, 10:38 AM
oh sorry, should be

04-26-2011, 11:57 AM
oh sorry, should be

Thanks. I got it downloaded but can't seem to get it to run. Sorry to pestering you. I get a not compiled for this architecture in lw 10 64 lw 9.61 64 bit and lw 9.6 32 bit. Running under Lscript/rt. running under lscript I get a "was expecting something else" error. I know it's probably something I'm doing wrong. Any ideas?

04-27-2011, 02:02 PM
How about soft bodies??

car hitting a body..ouch, I believe there must be specially designed stuff at the researchers and developers table.
I donīt think they combine any stuff with endorphin or euphoria do they:D

drool..would love to see a close collaboration from newtek and natural motion, providing easy pipelines with pre-rigs and plugins for transfer to lightwave.


Elmar Moelzer
04-27-2011, 04:06 PM
I think for really accurate simulation, you should be using the actual CAD files for the car with the material properties that the CAD software provides. Then use one of the simulation solutions offered for that software.
These things are usually costing more money than your family home. Just so you know.
If you just want to make an animation depicting the accident and do not actually have to simulate the accident, but recreate it, then LWs dynamics will do juuuust fine :)