Unity rolling friction. Ask Question Asked 6 years, 1 month ago.

Unity rolling friction The simplest rolling friction model I use in VPP is simply F = cN, where c is a coefficient (typicall betweeb 0. If i feed it the accumulated force (+weight force) and torque of a rigid body, and the point of contact between the ground and the wheel, I can then apply the inverse of that force projected onto the Sep 2, 2017 · I am trying to create a game where the player has to control a rolling sphere moving through a level. Jun 9, 2006 · I’m having fun learning about physic materials, but I’m having trouble getting my head around this one: I want a ball to bounce perfectly (going forever with no loss of energy) within a maze of sorts. Jun 20, 2014 · I am working on a prototype for my first game and i have run into a bit of a snag. These points are represented in the WheelCurve . It works very well, and the physics engine and friction take care of it rolling (rather than sliding) realistically. Nov 3, 2010 · What do I need to do for the ball to behave like it is rolling on grass (stopping full and goes in to sleep)? I’ve changed friction values on the physics materials on both object but I can never get it to fully stop. Mar 23, 2011 · The force added has to be a constant force (depending on slope angle). Feb 14, 2007 · First, I’d like to say that I am rather new at using Unity and may be using some “hacked-together” methods. I have put a physic material on both my ball and on the plane, but i see no “slowing down” effect, like there is no friction on it. 03 and 0. It’s the rolling friction force that I’m trying to add to it. The ground is uneven and sloped, but the golf ball’s velocity should be so low that it only rolls and never leaves the ground much. Ask Question Asked 6 years, 1 month ago. I know how to make a script to make a gameobject move forward, turn, shoot, etc using the character controller thing. I’m currently using the following: private Transform body; private Rigidbody motor; [SerializeField Nov 13, 2013 · Create a Physics2D material and then apply that physics material to your floor. It always slides slightly so that if I leave the game alone for a while it will move all the way over to the other side of the screen. how do i make it so that the ball rolls forward in a realistic way? thanks. Either I have the mass so high it just lands and doesn’t Jan 12, 2023 · I have a 3d world with a simple platform with a cube representing the player. Initially I was using AddForce in Mar 15, 2022 · Apologies in advance I expect this is a very stupid question… but. This problem looms in other projects I’ve seen here where when the character is standing on a moving platform (or some other collider) the Feb 7, 2014 · I have a RigidBody/Circle Collider that is rolling across numerous box colliders. Please remember when you are working with Transform, it means NO physics. Modified 6 years, 1 month ago. To do this, navigate to the Import Settings in the Inspector A Unity window that displays information about the currently selected GameObject, asset or project settings, allowing you to inspect and edit the values. It separates the overall friction force into a "forwards" component (in the direction of rolling, and responsible for acceleration and braking) and "sideways" component (orthogonal to rolling, responsible for keeping the car oriented). When I rotate the platform the cube glides and perform as you expect when increase and decrease the friction in the phy Aug 3, 2018 · Read more, Unity Doc. I’ve tried to set the friction to higher values, and nothing’s changed. 05) and N is the vertical force applied on the tire. I have set Restitution to 0 for both Physics Shapes, and it’s minimal but still noticeable. I increased the friction of the ball to 100, set the drag and angular drag to zero, and made the torque increase exponentially with respect to the ball’s velocity. Whilst the ball is moving I can tilit the box and get the ball to change direction. my players circle collider is either sliding or rolling off of the moving platforms i have created. May 8, 2021 · I am developing a 2d game in unity, and I am trying to add friction to slow the player down when he is on the ground. On a flat surface, this works pretty well, but I’ve noticed that if I roll the ball down a ramp, it reaches a pretty low Jul 15, 2018 · In real life, the friction between a car’s tyre and the road is what gives the car the power to accelerate forward. What did I miss? Oct 6, 2017 · How long will a ball, say a billiard ball, stop rolling on a flat surface for a given coefficient of friction? What is the formula for the ball's decreasing velocity? Gravity only causes rolling objects to slow down because it causes friction between objects. There are separate curves for the wheel’s forward (rolling) direction and sideways direction. Eventually the ball comes to a stop - but once it, has tiliting the box further does not make the ball roll anymore when I would have expected gravity to force the ball to start moving again. But friction is disabled Forward Friction and Sideways Friction. But I don’t want it to just slide across the ground. Nothing gets me past a speed of 15. May 26, 2014 · I’m trying to better understand Unity’s physics engine by making a simple game with a ball that rolls down ramps and around platforms. With an acceleration of 10, to get to a speed of 40, takes 4 seconds. Thing is, it won’t work. I’ve had a search around for a tutorial or help but could find anything that worked, could one explain to me how to achieve this? Thanks in advance Jul 27, 2005 · Hi I have a ball realistically rolling around inside a hollow box. Is it possible to do that AND have it visibly roll? I’ve made physic materials for the ground, walls, and ball that makes my ball bounce forever just as I wish–a bounceless ground with Aug 28, 2017 · Thank you for your answer! Unfortunately playing with air drag only seems to slow down movement, I still get an odd “minimum velocity” at which the ball keeps sliding/rolling regardless of drag. I am using ApplyLinearImpulse to move a ball (sphere shape) forward. I am using the 2d version of them, I made one material which had high friction. So I really need some help. Once the ball has stopped do I then need to apply a The Friction Joint__ A physics component allowing a dynamic connection between rigidbodies, usually allowing some degree of movement such as a hinge. Jun 3, 2010 · Also note that the default WheelCollider’s friction curve parameters in Unity (1,20000,2,10000,1) define a tyre with almost infinite grip. Jan 19, 2024 · What I’ve found is that my velocity ramps up to 15 but the more torque that I add to the ball I cannot seem to get it to go any faster. So, I’ve struggled enough with rigid bodies and wheel colliders to know they are overkill for what I’m trying to do right now. To add a tips about basic physics on Unity. I've jacked the friction way up on the ball and the surface, added some drag to the ball rigidbody, and that has helped. My problem is that because the ball is rolling the friction of the terrain has no effect on the movement of the ball, even with a friction of 5000 the ball Nov 21, 2022 · \$\begingroup\$ I think increasing friction would have the opposite effect, making the surface of the sphere more "grippy" so sliding contact rotates it. Friction does control when the ball transitions from sliding/slipping to rolling. I am using rigidbody for ball physics. It appears as if it’s hitting Oct 24, 2019 · When using the ECS Physics Package, a ball rolling on a mesh will bounce or slow when passing over an edge within the mesh. Deceleration is negative acceleration, and acceleration is (velocity change)/(elapsed time). Also use the sphere collider :) More research on bowling. May 23, 2018 · So what do we need? We need to set the ball to the right size and weight. 02 in the opposite direction that it is traveling. I set up the ball physics, set up the surface physics, and run a test. Unity’s built-in physics engine does the rest. Unity ball friction either too much or not enough. My settings for this were: Dynamic friction: 1 Static friction: 1. The level consist of different types of terrain with different bounciness and friction, these are set with the help of a physic material. I have defined two materials in Unity, one for maze (Dynamic Friction:1, Static Friction: 1, Bounciness: 0, Friction Combine: Average, Bounce Combine: Average, Friction Direction 2: 0, 0, 0, Dynamic Friction 2:0) and one for my ball (Dynamic Friction: 0, Static Friction: 0 Apr 16, 2020 · Submit (free) to Unity’s Asset Store; Try to optimize further; Some way to allow both rolling (sphere, capsule) and non-rolling (box, mesh) colliders for one CollisionEffects; Find the cause of crashing at super high speed and acceleration (grabbing one of the big boxes and scrolling back and forth): ``` 0x00007FF630285593 (Unity) FMOD Aug 1, 2023 · Hi everyone! I’m currently working on a car controller script using a sphere rigidbody and AddTorque for movement, and want to design it in such a way where the values are accurate and easy to understand for the player. And I have a surface, below the ball, with a Box Collider 2D. I have heard of physics materials, and am currently trying to use them. . I have a method that takes works out the amount of force to apply to a point to generate a specific amount of force and torque. My issue arises when the ship, a triangular mesh with corresponding mesh collider and non-kinematic rigid body, lands. See Wheel collider Friction for more details. If you press “W” the wheel rolls forward, “A” turns the wheel left, “S” rolls it back etc. May 25, 2011 · My game involves a ship landing on a rotating spherical planet. 😛 Dec 24, 2017 · It’s the result of the rubber being bent and stretched while rolling over the ground, and this force opposes the longitudinal rolling movement of the wheel. I have done many things like changing drag and angular drag while t… Here is what I've tried: Physic Material friction values don't work; a ball will continue to roll forever regardless of what friction value is set for either the ball or the surface. Aug 20, 2018 · Set a bounce factor close to 1, and a dynamic friction and static friction factor close to 0. Mess with it a bit until you get the right behavior. 2 checks are made 1st is to check if the object is moving 2nd is to check if the player is inputting to axis without input i would like the sphere to stop, sooner than it would natually as if there is a high friction level. 0. When applying force to the ball, it won’t stop. However, instead of gaining speed, it accelerates at first but then seems to hit a ceiling and wont go any faster. You've somehow started it moving at 2 m/s say. i made a short video to show the details (sorry about the quality) i have a friction material on my player and my platforms set to 10 friction. The strange thing is that both the player and the cubes have a custom physics material which has the friction combine mode set to “Minimum”. No physics, no friction. AddForce” in case that makes a difference. So when I throw the ball and it hits the ground it doesn’t roll properly/naturally. The hill is supposed to be made of grass, so, unless the hill is very steep, I want the ball to roll down the side of the hill for a bit, but at some point, the ball should to come to rest on the side of the hill. The Friction Joint A physics component allowing a dynamic connection between Rigidbody components, usually allowing some degree of movement such as a hinge. Wheel Friction Curves. Figure out how long you want the wheel to spin at a the maximum initial angular speed you'll allow, and that speed/time ratio is your deceleration rate. The block's movements are controlled purely through script using transform. And it moves. I have a physics scene with a ball on a hill. There's really no reason at all it will stop rolling or slow down. In both directions it is first determined how much the tire is slipping (based on the speed difference between the tire’s rubber and the road). Dec 7, 2013 · Trying to slow down a sphere controlled by the player, when there is no input from axis. Now, if you want to modify the angle of the plane on the fly, for that you may need to write some code. Translate(velocity) each Aug 19, 2020 · Therefore the angular velocity is off (this is due to how Unity calculates physics of interaction as a point of contact rather than an area of contact and therefore friction calculation is done at one point causing it to rotate slower). As you see in the picture, it allows you to define friction. When I spawn my spheres, they start rolling on the terrain in a very unrealistic way, just as though there was no friction Dec 17, 2019 · I am working on a basketball game. To work with physics, is always Rigidbody. Set the bounce factor combiner to maximum, and the friction factor to minimum to ignore the surface factor, but you can also set the surface physics material to similar value, and use average for Aug 15, 2007 · I’m playing around and i have made a little ball rolling on a plane. It also has a gravity field script applying an attraction force to nearby rigid bodies, excluding itself, of course. I want it to roll. Now I need to show the optimal shot, that is the angle and velocity with which the golf ball must be hit in order to perfectly reach the hole. Extract the car model’s textures so that Unity can display them in the Scene. Sep 22, 2011 · Hi I have a sphere (imported model) rolling along a flat surface. Like 0. The Forward Friction and Sideways Friction properties correspond to the points in the following wheel curve diagram: Typical shape of a wheel friction curve. Note that i’m moving my ball with “rigidbody. So the rigidbody has no choice but rolling-over when steering even at low speed. Can you clarify what should rotate the sphere? If it's only player control that should do it, we can lock rotation from physics effects. Everything looks greatbut the ball takes a LOOOONG time to come to a rest on a flat surface. Dec 26, 2012 · Hi all, I’m rather new to Unity, so forgive my stupid question 🙂 tried to look for an answer on the forum but for some reason I get timeout every time I search so here it is: I made a terrain with the terrain editor, and I scripted a sphere (with rigidbody) launcher. A GameObject’s functionality is defined by the Components attached to it. Jul 12, 2009 · Any of the things you mentioned can be faked pretty convincingly, but in your case maybe physics is the way to go. PhysX does not use a static friction for wheel colliders that are not moving (well, at least this was the case a few years ago) - it cheats and uses a constraint to prevent rolling / sliding - this is not exposed to the user. I know how to find the direction that an object is sliding across a surface (using dot product, the surface normal, and the velocity vector of the Oct 23, 2011 · Anyone know how to implement rolling friction or fake it so a ball/sphere can stop in the middle of an inclined surface? Using drag just makes it slow down, but doesn’t stop unless the surface is flat. It’s controlled by the arrow keys via AddForce(). . So many people are STILL experiencing the bug whereas a sphere with a rigidbody wont stop rolling. 5), or less, it moves Nov 3, 2010 · I achieved this in a couple minutes with zero scripting by simply playing with friction and the plane’s angle. 5,. Nov 6, 2019 · I am just using the plane mesh for now. I have tried playing with the friction values etc with no luck. I was thinking that I could animate the ball so it looks like its rolling but that would mess up my idea of the ball being able to roll over items if it were tall enough. We need to set the lane to very low kinetic friction, and low static friction. You are just changing its position and rotation. You may also want to very slightly raise the regular drag, but be very careful as this creates a semi-unrealistic Aug 2, 2016 · I have a ball with a Rigidbody 2D and a Circle Collider 2D. I am new at unity. It seems to be combining the friction from the 2 surfaces. im making a game where a ball controlled by you collects stars or something. Jan 13, 2014 · Hi guys, I’m working on an iPad golf simulation, but focussed on the putting green. More info See in Glossary 2D__ connects GameObjects The fundamental object in Unity scenes, which can represent characters, props, scenery, cameras, waypoints, and more. But unfortunally i havent found any way to add friction so i guess adding a force Dec 22, 2010 · After you do that, make sure the friction values are fairly high so that the ball will actually roll (with low friction, the ball ends up sliding instead of rolling, like it's made of ice and creating an entirely different issue). This is your chance to help set me straight 😉 I’m trying to put together a 2D game and it’s going well with the exception of friction. The Friction Joint__ 2D__ connects GameObjects The fundamental object in Unity scenes, which can represent characters, props, scenery, cameras, waypoints, and more. So Jul 30, 2010 · I’m trying to move my character (for example a perfect sphere or cylinder). Apr 29, 2020 · For a moment set aside the collider choices, and imagine in the abstract you have a ball rolling along a flat plane. Jan 7, 2015 · Friction from sliding or rolling is almost exactly constant deceleration. What I do now is a brute force So I have a rolling ball in my game. After that, you need to refer to that component, otherwise the game will not know, which RigidBody should get the force you are adding. This problem completely ignores all drag and friction and even when applying opposing forces it becomes apparent that the rigidbody reaches a certain Jan 20, 2014 · Now, everything works fine with this, except when the player is rolling directly on the seam of 2 cubes, his speed is halved. I tried to go for a similar situation in the “game” I’m working on, having a sphere that rotates itself in order to move. The user controls the direction in which the ball moves using the arrow keys, which applies torque to the ball, causing it to roll. With the mesh collider on my plane, the ball hits the inner edges and bounces up a little. Apr 14, 2016 · Sphere rigidbody - Doesnt stop rolling - Wanted:Insight - Offer:Workaround. i turned it up to the max and i couldn’t even walk and i still came Nov 2, 2015 · I've tested another level I made before in Blender, there I created 3D model of whole maze with not too much faces. The planet is a simple spherical object with a sphere collider and a kinematic rigidbody. it just slides away instead of rolling. They will bounce off a wall, then keep rolling very slowly forever until they hit something again. Why would it? There's no air resistance in physX and what you "want" it to do in the game engine physics is keep May 2, 2020 · hello, is there a way to get realistic ball rolling, with respect to rolling friction and such. More info See in Glossary 2D connects GameObjects The fundamental object in Unity scenes, which can represent characters, props, scenery, cameras, waypoints, and more. More info See in Glossary window and do the following: Oct 18, 2010 · Hi, im new to unity. It rolls fine, but what I am trying to achieve is a varying slowing down depending on which box collider it is in contact with – different frictions for different surfaces essentially. The platform the cube is on is completely flat. I can import the ball at any size and it works consistently, however if I manually scale the ball’s transform instead, by half (. I have previously asked Unity support about this issue and they said that it was a result of the collision detection method used in the new physics package. so that after a certain amount of time the ball stops. Thanks in advance. Basically, I just want to make a wheel move around using tank-style controls. Jun 23, 2024 · I am having some trouble calculating the static friction for a tyre. It Oct 10, 2024 · Hello, I’m having trouble setting up the physics for spheres. We need to throw it with enough force, and rotational force. On collision enter: Drag: 100 Angular Drag: 100 The Friction Joint__ 2D__ connects GameObjects The fundamental object in Unity scenes, which can represent characters, props, scenery, cameras, waypoints, and more. I launch the player into the air with the rigidbody's add force. Just read the documentation again and again, and try out things for yourself. I thought I could achieve that by using different physics materials, but it isn’t having the slightest effect on the rolling Feb 20, 2009 · Hey people. i tried to put a static friction from 0 to 500, but i don’t see any difference in terms of Wheel collider computes friction separately from the rest of physics engine, using a slip based friction model. I also have linear damping set to 0 as I want my ball to free roll. The only way to stop the Oct 28, 2009 · Hi all, I have a standard cube with a rigid body attached and I cannot seem to stop it moving when its resting. Jun 25, 2011 · I’m new to the unity engine (I’m sure I’m not the first to say that) I want to make a cube move around by rotating on its edges, so when forward is pressed the cube rotates on the forward edge 90 degrees. How I want it, is it looks like its rolling on its own Oct 19, 2018 · Smooth Player Ball Rolling - Unity 3D. Now to make it work the way you want, just change the linear drag of the Ball’s rigidbody to something other than 0 and Voila! Dec 16, 2017 · I am working on the friction for a square object for after it is done being pushed by the player. Tire friction can be described by the Wheel Friction Curve shown below. Jan 16, 2017 · First of all, you should add a RigidBody component to your GameObject. I need to simulate how a golf ball rolls on the grass, and like in real life it has to be able to stop rolling even if it’s not a completely flat surface (depending on grass height/green Aug 9, 2015 · So extremum and asymptote together determine the “friction” response of the tyre, depending on the level of slip. Is there any way to fix this without adding scripts to all my spheres? Or should I just not use them? It doesn’t seem to matter what I set the friction or angular drag to. I have the force for the ball calculated when it’s rolling around, I just need to know how I can apply it in the opposite direction that it is traveling. I expected that if I increased the friction of either the surface May 29, 2010 · I’m creating a raycast car system, and currently I’m struggling with how to apply friction correctly (for now assume the brakes are locked up and the wheels aren’t rolling, therefore it doesn’t matter what direction the wheels are facing). I want precision control over the object. So I decided to add a Physics 2D material with a certain friction to the surface game object. This may be way higher, and move way faster than looks normal. Also, I watched “roll a ball” tutorial but couldn’t get any clue. qfxoyu jznxi yvra pzoohc aosuj qumkd qcmvtfv rmiir qmhbceh aquu