Edy's Vehicle Physics - official thread

Simply increase MaxDriveForce until the vehicle can climb those slopes. This will also increase the acceleration, so you might want to tweak the Force Curve Shape as well to a smaller value. I presume the type of curve used in GTA5 is like this:



In summary, it's a matter of adjusting max drive force, force curve shape and max speed forward (as tweaking the acceleration may affect the effective max speed as well).

 

Brilliant support, thanks Edy

 

Hi Edy,

I'm finding it's a bit too twitchy. When my 80 kg mass player touches the car which is 1000kg, the car raises or hops like a little rabbit. That's really unusual - any idea what might be causing it? it seems hyper responsive to physics based character controllers (such as that from puppet master). I've asked a similar question over on partel's thread. Seems like they explode, it also breaks puppet master, as if you're applying powerful response forces or maybe puppet master is.

The post on puppet master is here: http://forum.unity3d.com/threads/pu...ics-tool-released.358445/page-10#post-2634426

edit: also happens with my own controller, and I have to make it really weak so it won't. I suspect it's related to whatever actions you take when the car collides... I need to control or switch that response off I think?



Edit: One more observation: the suspension only "activates" or responds if there is a weight on the car or another physics interaction on it - it is flat with no suspension happening until it touches something be it a simple ball or a wall. Any idea why? otherwise it sits dead with no suspension force... Could this be a bug with newer 5.3.4+ builds? Also flat when driving (unless it touches something).

I have a gravity of -28 for my game so things are snappy, but I notice it's similar behaviour with -10, just less visible - still there though.

 

Wow, that's really strange! Can it be reproduced using the Demo scene and resources only?

Let's say that you have the EVP demo scene, drop a character controller prefab on it (coming from the Standard Assets, from example), and the demo vehicles will explode at the slightest contact?

The problem persists on these conditions, then please try it again but disable the VehicleController component before touching the vehicle. What happens then?

 

I fixed the hopping - I believe it was because Enable Adaptive Force was checked with larger than normal gravity. I'm still able to push it around a bit too easily but it's bearable. I think really, I need to keep my masses very low for the character overall, in these circumstances.

I can understand how -28 for gravity might throw all the math out the window a little...

I don't think it's your fault

 

Thanks for the update!

The wheel contacts should be in sleep mode at rest unless contacted with a relative velocity greater than 4.0 m/s. For instance, a vehicle in rest in a slope can support another contacting vehicle without moving. Maybe the physics engine wake up the wheels when the rb is contacted with a CharacterController. This would explain why you can push the vehicles around, but I don't know how this could be fixed...

 

I could wake it manually on contact I guess, from the player itself? How would I go about it?

 

If you can push the vehicles and it moves, then the wheels are already waked up. From within EVP I can only specify whether the wheels are allowed or not to sleep, but the final sleep decision comes from the physic engine. Check out the method UpdateWheelSleep at VehicleController.cs.

 

Edy's vehicle physics + Highly Detailed Car Model 2

 

I think you need to try to increase the number of polygons in the Collider. The collision Collider mesh does not change, thus it must be?

 

@Edy, were the manual gears implemented?

Is there any example of how config a truck? We've a truck with trailer (tractor+trailer), but at high speeds (> 60-70km/h) the tractor (and the trailer after it) ends sliping, no idea why.

Thanks in advance

 

The collider is a Convex collider. It's automatically built by Unity out of the provided collider's geometry, but the resulting convex hull cannot have more than 255 polygons. So providing a collider with more polygons will have no effect.

For the Collider mesh to change it must be referenced from the VehicleDamage component.

Not yet, but it's planned for the next release as an add-on component.

I'd love to include a truck+trailer example if I'd have some 3D model I could include in the package. If you can provide one, I'll happily configure and include it in the next release.

 

Hi @Edy,

Thanks for your responses. In the beginning, we use this two models as placeholders before the good one was finished, maybe you can use them for the example.

Tractor head: http://archive3d.net/?a=download&id=917cf3de
Tractor trailer: http://archive3d.net/?a=download&id=e3b7bf22

 

Wrote an independent review of this asset on http://www.thedailyasset.com/
Congrats to @Edy for creating this amazing package.
Direct link to his Asset Store page: bit.ly/29TloDs

 

Hello, I'm trying to use EasyRoads and and Edy's Vehicle Physics. I create a road on a basic terrain, everything looks good, but when I start the game and drive a car on the road, the tires looks sunk into the road. There is no problem when I drive off the road. What can be the problem? I use Edy's camera prefab and car prefabs to test.

 

try changing the shader of easyroad mesh from easyroad to mobile/diffuse or something other default diffuse shaders.

 

Just give road the same layer as terrain plus a collider.

 

Hello,

First thank you for this great Asset, makes things much easier and more fun

Now for my question:

I am importing FBX models into unity, everything seems to be working fine except that inputs seem to be the opposite direction. Throttle Input -1 Moves forward, and 1 moves backwards. A workaround for this was to rotate the wheels 180 degrees and adjusting the colliders based on that, now everything moves in the right direction, but Car ends up moving way too fast and speed shows in the negative. I imported my car into the EVP sample scene seems like the problem is in my car only, the sample one was fine. I just did that to narrow down the problem, but I cannot find a workaround for it or even fix the problem from my side. I even tried rotating the facing direction of the wheel to the opposite side before exporting to to FBX then into unity, still same problem. Please? and thank you

 

@Phuzz the vehicle's forward direction must be +Z. If meshes have a different orientation, you may rotate only the gameobjects containing these meshes, or put them into child gameobjects you can rotate, so the vehicle and wheelcolliders are not affected by the rotation. WheelColliders must have scale 1 and rotation 0 in their transform and all their ancestors.

 

Hello,
Thank you for your work, I have already implemented physics into my game and they make it a lot more realistic.

But I have a little question.
How do I make the car go really fast. I meant something like Bugatti fast. I have been experimenting inside the demo scene using racing coupes with many different values, but I have only been able to reach something like 280 km/h, but the vehicle gets really unstable, drives very unrealistically (tire traction needs to be set very high, mass has to be very low and curve is set to high). So is there a way to make a car drive fast but still feel realistic? What other values should be changed in order to achieve this?

Thank you again.

 

@TheDiamondPlay Most likely the aerodynamics need to be setup correctly. Write me to edy@vehiclephysics.com if you need more details or assistance.

 

Sorry for the late reply, Yes I solved this by having them (The Vehicle Mesh)rotated to the right direction before exporting to FBX Thank you for your support and great plugin.

 

I just wrote a script for car teleportation triggers - place it on a game object with a trigger collider (the trigger checkbox checked), set the teleportation target reference to any game object (the orientation will also be considered, not only the position) and specify which collider tags will teleport their parent VehicleController... check it out:

https://gist.github.com/Souliloquy/7c912c4ff1d931bd48ba7f8e277000ea

I'm doing some hacky stuff like waiting frames, if you can find a cleaner way to do it please let me know!
Cheers

 

^ Oh, that happened to me too, but it was with custom road pieces I had, and it turns out that the mesh collider had to be set to Convex for it to actually collide with the Wheel Colliders for some reason.


I am having some difficulty creating a custom script for vehicle AI. It has some similarities to the provided Randominput script but my difficulty lies in getting it to work with a waypoint system. I can get it to find the next waypoint just fine, but setting the throttle and steering to the correct numbers for it to actually reach that waypoint has been fairly difficult for me.

Currently for steering, I take the dot product of the car's orientation (transform.forward) and waypointPosition - carPosition, then do the math to isolate the angle, which should be in the -360, 360 range. Then I get it into the -180, 180 range (for example, if the angle is 190, change it to -170). Then I divide it to get it down to the desired -1, 1 range for steering........ but I realized that that's not how the steering works. the number for steering means "this is how the wheels should be turned", not "this is the direction the car should be turning towards".

Basically I think I'm going about this all wrong but I'm not sure what to do to fix it. Any ideas?

 

Hi Edy

I think I have broken my game without any backup when I want to try Unity 5.4 new visual effects from 5.3.

What happens now.
1- When the game starts WColliders Suspension Spring / Forward Friction / Sideways Friction parameters become 0 at inspector(after start).
2- When car gets any speed (as there is no suspension?!) car starts to shake rapidly up and down until it breaks the terrain collider and starts to fall down. (Shake is very tight yet rapid)
3- Even though I try to update values from other cars after starting the game and even though now I see car has suspension as car's body is lifted by suspension, again car is too tight and again rapidly shakes and break terrain collider at 30-40km/s

This is a gif showing the bug and telemetry data
Edit: You can see car is bouncing and sliding to right even though I am only accelerating and not steering. Yet ofc the ground is not fully flat.
Edit2: Now checked your last vers on clean build and yes it is supposed to change values to zero. And you have fewer parameters now
Edit3: Do you aware of any physix changes breaking your old scripts?? If so what is the best way to update to your last vers? (Honestly as game is broken now I am not really sure if I can make it worse yet a pro advice won't hurt)

https://gfycat.com/GreedySnivelingHerculesbeetle
http://gfycat.com/ShimmeringBitesizedGoldenretriever

I am also trying to solve it. Mind you this is not the last vers of Edy's physics. It is coming from May 2015.

http://gamejolt.com/games/yet-another-car-game/64040 the working game is here.

 

Suspension spring and damper are not modified. Friction parameters become zero, this is correct. EVP does not use the WheelCollider friction.

Please write me to edy@vehiclephysics.com for further assistance. Include your invoice number.

 

Hi, Edy!
In my game I want to add some obstacles on the track and one of them is a river. And I want to simulate something like river flow, which should push a car along with this flow. I tried to use rigidbody.MovePosition() in FixedUpdate(), but the car starts to shake. Is this a wrong way to implement this kind of stuff or may be I did something wrong?
I also tried to add forces to cars rigidbody, and it feels right only when a flow direction close to collinear/anti-collinear with car direction but when flow close to perpendicular with car direction it looks strange. It feels like physics engine didn't allow car side movement, or side friction is too high. How can I achieve this effect of sliding car in flow direction in the right way? May be I have to mention that my gravity vector is (0, -30, 0).

 

@timintal achieving that effect may require some modifications to the EVP code. Please write me to edy@vehiclephysics.com and I'll be happy to help you. Include your invoice number.

 

I am looking to make motorcycles with two and three wheels as well as a motor driven unicycle. How easy is this to set up single and dual inline wheels so the vehicle does not tip over and will angle or lean into turns? I am looking seriously at your Pro version. I am working for the folks who put on the car shows here in the southeastern US and to be able to dial real world numbers in is fantastic for the applications they want me to produce. I will also be attempting to emulate real world NASCAR cars. I note that some folks had issues with high speeds. These stock cars typically run between 185 and 220 top end.

 

Good Morning, I am looking for a simple way to toggle the vehicle to
reverse. I have tried a few different ways but none work to my liking. The
issue is that we are creating a driving simulator and the players always
begin in reverse to start the game. Once they have reversed away from the
garage the vehicle is put into drive automatically. Ideally there is a
trigger volume and OnTriggerStay the car is in reverse, OnTriggerExit the
car is in drive.

Here is a sample of what I wrote:

Code (CSharp):

1.  void OnTriggerStay(Collider other)
2.     {
3.         VehicleController vc = other.gameObject.GetComponentInParent<VehicleController>();
4.  
5.         float v = Input.GetAxis("VerticalReverse");
6.  
7.         if(v > 0)
8.         {
9.             vc.throttleInput = -.7f;
10.             vc.brakeInput = 0f;
11.             vc.steerInput = .5f;
12.             //v = -1f;
13.         }
14.     }
15.  
16.     void OnTriggerExit(Collider other)
17.     {
18.         Destroy(this.gameObject);
19.     }

 

Hey Edy, Great asset!

The parameters under WheelCollider, such as any parameters under Sideways Friction don't seem to have any effect at all in my game. I'm trying to make the car turn sharply but even the slightest turning makes it spin out easily. Played with all other values like COM and drag force.

Are WheelCollider parameters not working in Unity 5 anymore?

 

Motorcycles: actually the easiest trick is to put the center of mass beyond the ground. I'm working on arcade motorcycle physics, which would work with unicycle as well.

I'm emulating fast racing cars successfully, including high-end supercars and formula-1 style open cars. I don't see any significant difficulty on setting up NASCAR cars with Vehicle Physics Pro. We would only need good car data.

 

@James-Williams please write me to edy@vehiclephysics.com for further assistance.

WheelCollider friction parameters in Edy's Vehicle Physics have no effect. Indeed, they are all set to zero in runtime. Only radius, suspension distance, suspension spring and suspension damper are configured at the WheelCollider. All other values are meaningless to EVP.

 

Hey, Edy, thanks for a great asset. I just won this in the #UnityChristmas giveaway contest. This was something on my wish list for a while so it was a pleasant surprise to win a license. We definitely have some plans for a game using this amazing asset.

 

Cool @magique, congratulations! Let me know if I can help you with it.

 

Hi @Edy
I am thinking to buy this asset for demo scene of my track builder system.
. I have few questions
1) Does it allow manual gear?
2) Is there any graph UI like for speed, gear, etc?
3) What about 3 wheels or 2 wheels?
Thanks.
Cheers

 

Hi @antoripa, many thanks!

1) No, but it may be easily implemented via add-on script. I'll be including a manual gear script in next version.
2) I'm working on that right now.
3) No problem on 3 wheels. 2 wheels work but there's not equilibrium implemented. The quick trick is moving the CoM beyond the ground. I'll be including motorcycle physics in an upcoming version.

Let me know if I can help you further!
Cheers,
Edy

 

Hi @Edy
thanks you for your answer.
Basically I would like to know if you have any script that I can use as starting point for themanual gear patch and what is your eta for UI release. Thanks .. .I am gonna send a PM for another topic ..
Cheers,

 

I just started playing with this today and I'm very impressed. The system is working smooth and very fast. I'm looking for some quick tips on adjusting vehicle parameters in order to have vehicles less realistic and more arcade style. Basically, I'd like to have cars that can fly around tracks at breakneck speeds and not have very much drift or sliding and that can turn rapidly even around sharp turns. What parameters would I tweak to accomplish this?

 

@magique glad you like it!
These settings at the Vehicle Controller component turn most vehicles into arcade vehicles a'la Mario Kart or Outrun:

• Tire Friction: 3
• Anti-roll: 0.9
• Force Curve Shape: 0.99

 

Fantastic. That works really well.

 

OK, so I've set up some AI cars using Racing Game Starter Kit and EVP, but even with these settings and some other tweaks, I still get a lot of slipping that I'd like to eliminate if possible. I think the main problem is slipping due to braking. Whenever the AI cars brake, they seem to slip side to side even if only slightly now. But it happens quite a lot and it would be nice to not have persistent slipping. I tried to make changes to slip parameters and give the car maximum steer and braking assist, but still not quite there. Any more suggestions would be appreciated.

[EDIT]
I've been playing with every value I can think of and the cars are certainly doing better now. Less going out of control and more capable of making it around a difficult track. I'm still tweaking and trying things though so if there are any more suggestions I am open to hearing them.

[EDIT 2]
Still not there yet. I have a new track with all flat ground and very easy to navigate around and all the cars with EVP on them are always bouncing up and down in the rear suspension and so easily prone to slip. Is there no way to get the cars to behave properly? When I use the default RGSK physics then I don't get this kind of behavior, but it also performs a lot worse than EVP.

[EDIT 3]
It seems a lot of my own tweaks are responsible for most of the issues. I went back to settings from a sample car and tweaked from there and it's looking better.

 

I'm having serious problems configuring new vehicles. I'm following the video tutorial, but 2 things are going wrong. First, after configuring the wheels and clicking on Adjust wheel colliders to their meshes, the results don't line up. See image below:



So, I manually move the circles so they match the wheels. However, once I get the vehicle in game, the whole wheel setup is rotated 90 degrees. See below.



What am I doing wrong?

[EDIT]
Well, I've tried with some new cars I bought and have no issues. So it has something to do with the way those other cars are built I think.

 

Certainly it's very strange.

- Ensure that "Wheel Transform" fields are pointing to "WheelFL", "WheelFR", etc. meshes in the vehicle, not "WheelFL" etc WheelColliders.
- "Forward" should be +Z in the vehicle and the wheels.
- Children objects shouldn't have any rotation or scale applied.

Forum board is typically used for quick questions on EVP. If you need continued detailed support, the best channel is by email. Feel free to write me to edy@vehiclephysics.com (include the invoice number for EVP).

 

Thanks. I may give those cars another try. Btw, I figured out that the way to really give the cars better handling and avoid slippage is to increase the angular drag on the rigidbody. I have my cars around10-12 and they can really fly around the track now.

 

Edy could you please also integrate motorbikes? EPV feels not "complete" without motorbikes, they are also vehicles and if people want to make games like GTA or open world games with cars, motorbikes should also be possible to make. ^^

And does EPV work in multiplayer, for example in combination with Third Person Controller from Opsive?

 

@FlyHigh Yes, motorbikes are on the radar. There's no ETA yet but they will be eventually there.

Third Person Controller from Opsive already includes integration with EVP:
http://opsive.com/assets/ThirdPersonController/integrations.php

 

Potential Buyer here ....
has anyone ever created RC style vehicles .. I'm wondering how the physics would react being scaled down by 32 scale

I'm interested in creating a R.C Monster Truck style game with toy cars.
skid marks on uneven ground... is this possible ?
How many engine sample sounds does the pack contain ?

All the examples I've seen to date have been in flat land & real world scale.

 

@Banksy Scale should always be 1 in vehicles. However, you can just create small RC vehicles and small playgrounds, everything real world scale. I've tested EVP to work properly with vehicles as lightweight as 1 kg.

Yes, skidmarks and tire marks work on uneven ground out of the box:



The pack contain three different engine samples as for the types of vehicles included as examples.

 

Hi @Edy

I did try drift car, but its not stable. It difficult to drift car even i am using mobile accel control. Could you add a class to make it stable and more easy to control like this: