Games Vehicle Physics Simulation (Update 20-Feb-17 Terrain Editor Preview 1)

Hello everybody.

I want to show you all my WIP project, a custom made vehicle physics system, capable of simulating any type of landbased(for now) vehicle you can think of (cars,trucks,trains,cranes,excavators etc.)

It's still at a very early stage, especially things like the terrain/scenary, UI, sounds and such things are all just placeholders, and the same for some of the vehicles in my videos.

I'm the only programmer/developer on the project, but with help from a great 3d artist (Arraial).

Any kind of feedback is appreciated, but as mentioned above much of the visuals is temporary/placeholder so try to ignore that.

Here is a couple of videos showing some different vehicles, unfortunately most of my videos is outdated quite a bit, but i will be updating with new videos frequently so keep your eyes open.

More videos can be found on my Youtube channel : https://www.youtube.com/user/AndersOerum

-Anders Ørum

 

And just a few more videos, they couldn't fit into the start post.

 

I watched three of the videos and it looks great, my only question is why isn't it being released tomorrow

 

Thank you, hehe no it isn't ready yet, there is still alot of things i want to add/improve. But i will soon release a small tech demo

 

Very impressive demo videos. Please continue developing and release it in Unity asset store soon.

 

Thank you, i'm sorry but currently i have no plans to release it on the asset store.

 

Hi finally time for an update!

Renualt Premium 420, pulling log trailer with 12 big logs.

 

Would make a great asset store package. But good luck with your project, looks real interesting.
Will be keeping an eye on it

 

This looks really fun! Combine this with some interesting terrain effects (tread/skid marks, dirt/mud compression) and you got yourself a great game! Call it Haulin' and build a modding kit for players and you'll be a millionaire in no-time

 

Hi thanks for the great feedback, i hope to add all the terrain effects you mention, mod support is definately planned aswell, and Haulin that's actually not bad for a name, i'll consider that thank you

 

Update! Testing new terrain deformation system, still very simple and rough but it's a start

 

Looks awesome. Feels like an spin tires fork has hit unity. I love it. May be it takes a bit long for the terrain to collapse.

 

Wow that was quick! This looks like a great start for deformation and overall terrain integration! Can't wait to see where this goes.

 

Thank you, yes the deformation is a little delayed, but i'm currently working on improving on that.

Hehe yeah i decided to give it an other try yesterday

 

Give us web demo man. . . .

 

Hey man, it's the most amazing Véhicule and Terrain I have seen.
Congratulations!!!!

 

Thats really awesome Work!

Since physx 3.xx vehicles are S*** i wondered if you could give me a hint what magic did you use?
Bulletphysics / your own physic lib stuff? or did you hack physx 3.xx and made your own models based on that?
Especially interesting for me is how did you solve the sweep test for the wheels? Your jeep wheels wont go into the rock and your actually climbing at 90 degree angles Or otherwise said how did you solve the realisstic collision so it dont look like a cheap 4 raycast model car at all?


I had to put my own project on hold because of what nvidia ships with physx.

 

Awesome work, I look forward to seeing this system evolve.

 

I'd definitely pay money to use these physics on the vehicles in my projects, looks amazing!! And the vehicle models themselves are also quite beautiful too

 

Hi i'm back again with more news!

I've been working on a new Wheel Collider lately, and i've finally reached the point where i'm ready to show you guys.
The focus of this wheel collider is on physics based tire deformation, this is not just a visual effect the actual wheel collider is deforming aswell, it still looks a little rough but it's getting there.

!Notice: The softness of the tires is exaggerated a little in the video to make the deformation more visible.

 

Looking good.

 

looking great! Do the tires wear or take damage? I can't imagine that rock obstacle course was very kind on them

 

Currently there is no such features, but they are definately getting on my idea list, thanks

 

Did you check this out?

http://www.gamasutra.com/blogs/Pave...ng_and_simulation_in_offroad_driving_game.php

I think what I would do eventually is use a normal Unity terrain and then in certain locations of a detailed mesh on top of the terrain that uses a texture to determine vertex position changes on the GPU. So as the vehicle is driving over this detailed mesh, using whatever math is needed, modify the texture which then results in the vertices moving via the shader.

A 256x256 texture for a 10mx10m detailed mesh would be 25 pixels per meter, which is 0.64 pixels per INCH which is easier for me to understand. That's pretty detailed in my opinion.

What do you think?

 

So you are building this system for use in your own game then?

 

Looks awesome! Subbed.

 

Hi, yes i've already looked a little at that article, your suggestion sounds like a good way to go with this, and it's probably much the same approach used in Spintires. Thanks for the feedback.

 

Yes exactly

 

Would modifying the mesh vertices in scripting, which would force a push of the new mesh to gpu, be more efficient than updating a texture and then sending that to gpu, every x frames?

 

I'm not quite sure to be honest?

 

Hi, another update on the tire physics, i've improved handling and stability of the tire which gives vehicles much better handling at higher speeds, also improved the visual deformation.

 

Time for another update,

I'm working on implementing Truss Softbody Physics with my vehicle system, currently working on the tires but i will soon start work on softbody based suspension and chassis aswell.

Toyota FJ40:

Mtvr:

 

Looking good man!!

 

Very nice!

 

Hi guys, time for an update again.

All Powertrain/Drivetrain (Engine, Gearbox, TransferCase, Differentials etc.) code is completely reworked since last videos and is now based on real ratios & values, but it's still a work in progress(at 2.05 & 5.00 differentials are locked which is the reason for the suddon power/traction)

 

Something like this was on the asset store before. I can't find it anymore.
FYI, when you see an awesome asset on the store, get it while you can, sometimes devs will take it down out of no where.

 

Was it this one https://www.assetstore.unity3d.com/en/?gclid=CKrPhYPIpcQCFUbKtAodUC4A_w#!/content/39946

 

Just a little video of me playing around and trying to transport some logs, it's not as easy as it sounds

Part 2:

 

Here's a small showcase of my tire physics with soft settings applied to them.

 

Those are almost like jello filled tires. Are you over exaggerating it a bit just so show it off?

 

Yeah i'm exaggerating the softness a bit to show it off

 

The lateral movement of the tire is not that far from reality
Check out this video from 0:11

 

Wow that's pretty insane. That's definitely a very specific application though, I'm pretty sure most tires don't act like that, especially on the offroad trucks he's normally showcasing! But the fact it can do it, and can be tweaked to change for all vehicle simulations, is great!

 

Are the rims also using truss physics or are they rigid bodies?

 

share this awesomeness already!!
my game won't make sense without this lol.
outstanding stuff Anders. <3

 

are you using Unity's WheelCollider or have you implemented your own awesome Collider??

 

Sorry i thought i already had replied to you, the new forum layout got me confused i just realized now they rolled back to the old

Anyway yes the rims is also made with Truss physics but they aren't setup to deform.

 

This is my own wheel collider built with Truss physics.

 

Good news! I'm finally working on full softbody simulation of my vehicles, here's a little video of an early test.

 

Looks great! I love following your progress