Unity Script Reference:

RigidbodyNamespace: UnityEngine
Parent class: Component

Description

Control of an object's position through physics simulation.

Rigidbody components take control over an object's position - it makes the objects fall down under the influence of gravity, and can calculate how objects will respond to collisions.

When manipulating rigidbody parameters you should work inside the FixedUpdate function. Physics simulation is carried out in discrete timesteps. The FixedUpdate function is called immediately before each step.

Things to watch out for when using rigid bodies:

1. If your simulation looks like slow motion and not solid:
This is a problem of scale. When your game world is huge everything will appear to be move very slowly. Make sure all your models are in real world sizes. For example a car should be around 4 meters long. A character around 2 meters high. An object falls at the same acceleration no matter big or small, heavy or light. If your game world has a large scale, objects will still fall at the same acceleration. But since everything is larger, objects will appear like they fall slower.

Variables

angularDrag	The angular drag of the object.
angularVelocity	The angular velocity vector of the rigidbody.
centerOfMass	The center of mass relative to the transform's origin.
collisionDetectionMode	The Rigidbody's collision detection mode.
constraints	Controls which degrees of freedom are allowed for the simulation of this Rigidbody.
detectCollisions	Should collision detection be enabled? (By default always enabled).
drag	The drag of the object.
freezeRotation	Controls whether physics will change the rotation of the object.
inertiaTensor	The diagonal inertia tensor of mass relative to the center of mass.
inertiaTensorRotation	The rotation of the inertia tensor.
interpolation	Interpolation allows you to smooth out the effect of running physics at a fixed frame rate.
isKinematic	Controls whether physics affects the rigidbody.
mass	The mass of the rigidbody.
maxAngularVelocity	The maximimum angular velocity of the rigidbody. (Default 7) range { 0, infinity }.
position	The position of the rigidbody.
rotation	The rotation of the rigdibody.
sleepAngularVelocity	The angular velocity, below which objects start going to sleep. (Default 0.14) range { 0, infinity }.
sleepVelocity	The linear velocity, below which objects start going to sleep. (Default 0.14) range { 0, infinity }.
solverIterationCount	Allows you to override the solver iteration count per rigidbody.
useConeFriction	Force cone friction to be used for this rigidbody.
useGravity	Controls whether gravity affects this rigidbody.
velocity	The velocity vector of the rigidbody.
worldCenterOfMass	The center of mass of the rigidbody in world space (Read Only).

Constructors

Rigidbody

Functions

AddExplosionForce	Applies a force to the rigidbody that simulates explosion effects. The explosion force will fall off linearly with distance to the rigidbody.
AddForce	Adds a force to the rigidbody. As a result the rigidbody will start moving.
AddForceAtPosition	Applies force at position. As a result this will apply a torque and force on the object.
AddRelativeForce	Adds a force to the rigidbody relative to its coordinate system.
AddRelativeTorque	Adds a torque to the rigidbody relative to the rigidbodie's own coordinate system.
AddTorque	Adds a torque to the rigidbody.
ClosestPointOnBounds	The closest point to the bounding box of the attached colliders.
GetPointVelocity	The velocity of the rigidbody at the point worldPoint in global space.
GetRelativePointVelocity	The velocity relative to the rigidbody at the point relativePoint.
IsSleeping	Is the rigidbody sleeping?
MovePosition	Moves the rigidbody to position.
MoveRotation	Rotates the rigidbody to rotation.
SetDensity	Sets the mass based on the attached colliders assuming a constant density.
Sleep	Forces a rigidbody to sleep at least one frame.
SweepTest	Tests if a rigidbody would collide with anything, if it was moved through the scene.
SweepTestAll	Like Rigidbody.SweepTest, but returns all hits.
WakeUp	Forces a rigidbody to wake up.

Messages

OnCollisionEnter	OnCollisionEnter is called when this collider/rigidbody has begun touching another rigidbody/collider.
OnCollisionExit	OnCollisionEnter is called when this collider/rigidbody has stopped touching another rigidbody/collider.
OnCollisionStay	OnCollisionStay is called once per frame for every collider/rigidbody that is touching rigidbody/collider.

Inherited members

Variables

animation	The Animation attached to this GameObject (null if there is none attached).
audio	The AudioSource attached to this GameObject (null if there is none attached).
camera	The Camera attached to this GameObject (null if there is none attached).
collider	The Collider attached to this GameObject (null if there is none attached).
collider2D	The Collider2D component attached to the object.
constantForce	The ConstantForce attached to this GameObject (null if there is none attached).
gameObject	The game object this component is attached to. A component is always attached to a game object.
guiText	The GUIText attached to this GameObject (null if there is none attached).
guiTexture	The GUITexture attached to this GameObject (Read Only). (null if there is none attached).
hingeJoint	The HingeJoint attached to this GameObject (null if there is none attached).
light	The Light attached to this GameObject (null if there is none attached).
networkView	The NetworkView attached to this GameObject (Read Only). (null if there is none attached).
particleEmitter	The ParticleEmitter attached to this GameObject (null if there is none attached).
particleSystem	The ParticleSystem attached to this GameObject (null if there is none attached).
renderer	The Renderer attached to this GameObject (null if there is none attached).
rigidbody	The Rigidbody attached to this GameObject (null if there is none attached).
rigidbody2D	The Rigidbody2D that is attached to the Component's GameObject.
tag	The tag of this game object.
transform	The Transform attached to this GameObject (null if there is none attached).
hideFlags	Should the object be hidden, saved with the scene or modifiable by the user?
m_CachedPtr
m_InstanceID
name	The name of the object.

Functions

BroadcastMessage	Calls the method named methodName on every MonoBehaviour in this game object or any of its children.
CompareTag	Is this game object tagged with tag?
GetComponent	Returns the component of Type type if the game object has one attached, null if it doesn't.
GetComponentInChildren	Returns the component of Type type in the GameObject or any of its children using depth first search.
GetComponents	Returns all components of Type type in the GameObject.
GetComponentsInChildren	Returns all components of Type type in the GameObject or any of its children.
SendMessage	Calls the method named methodName on every MonoBehaviour in this game object.
SendMessageUpwards	Calls the method named methodName on every MonoBehaviour in this game object and on every ancestor of the behaviour.
GetHashCode
GetInstanceID	Returns the instance id of the object.
ToString	Returns the name of the game object.

Static Functions

Destroy	Removes a gameobject, component or asset.
DestroyImmediate	Destroys the object obj immediately. You are strongly recommended to use Destroy instead.
DontDestroyOnLoad	Makes the object target not be destroyed automatically when loading a new scene.
FindObjectOfType	Returns the first active loaded object of Type type.
FindObjectsOfType	Returns a list of all active loaded objects of Type type.
Instantiate	Clones the object original and returns the clone.

Operators

bool	Does the object exist?
operator !=	Compares if two objects refer to a different object.
operator ==	Compares if two objects refer to the same.