PhysicsRelativeJoint

struct in UnityEngine.LowLevelPhysics2D

Implemented in:UnityEngine.Physics2DModule

Leave feedback

Suggest a change

Description

A joint constraint used to control the relative movement two bodies while still being responsive to collisions. A spring controls the position and rotation and velocity control allows for simulated friction such as seen in top-down games. A typical usage is to control the movement of a dynamic body with respect to the ground.

Properties

Property	Description
angularVelocity	The desired angular velocity.
bodyA	The second body the joint constrains.
bodyB	A local anchor point on the first body for the constraint.
callbackTarget	Get/Set the System.Object that event callbacks for this joint will be sent to. This includes the following events: - A JointThresholdEvent with call IJointThresholdCallback.
collideConnected	Whether the shapes on the pair of bodies can come into contact.
currentAngularSeparationError	Get the current angular separation error for this joint, in degrees. This does not consider admissible movement.
currentConstraintForce	Get the current constraint force used by the joint, usually in newtons.
currentConstraintTorque	Get the current constraint torque used by the joint, usually in newtons.
currentLinearSeparationError	Get the current linear separation error for this joint, usually in meters. This does not consider admissible movement.
drawScale	Controls the scaling of the joint drawing.
forceThreshold	The force threshold beyond which a joint event will be produced.
isOwned	Get if the joint is owned. See PhysicsJoint.SetOwner.
isValid	Checks if the joint is valid.
jointType	Gets the joint type. See JointType.
linearVelocity	The desired linear velocity.
localAnchorA	The local anchor frame constraint relative to bodyA's origin.
localAnchorB	The local anchor frame constraint relative to bodyB's origin.
maxForce	The maximum linear force, usually in newtons. A value of zero is a special case which turns the limit off.
maxTorque	The maximum torque, usually in newton-meters. A value of zero is a special case which turns the limit off.
springAngularDamping	The spring angular damping.
springAngularFrequency	The spring angular frequency, in cycles per second. A value of zero is a special case which turns the angular spring off.
springLinearDamping	The spring linear damping.
springLinearFrequency	The spring linear frequency, in cycles per second. A value of zero is a special case which turns the linear spring off.
springMaxForce	The spring maximum linear force, usually in newtons. A value of zero is a special case which turns the force limit off.
springMaxTorque	The spring maximum torque, usually in newton-meters. A value of zero is a special case which turns the torque limit off.
torqueThreshold	The torque threshold beyond which a joint event will be produced.
tuningDamping	Controls the joint stiffness damping, non-dimensional. Use 1 for critical damping.
tuningFrequency	Controls the joint stiffness frequency, in cycles per second.
userData	Get/Set PhysicsUserData that can be used for any purpose. The physics system doesn't use this data, it is entirely for custom use.
world	Get the world the body is attached to.

Constructors

Constructor	Description
PhysicsRelativeJoint	Create a PhysicsRelativeJoint from the specified base joint. The provided joint must be a joint type of PhysicsJoint.JointType.RelativeJoint.

Public Methods

Method	Description
Destroy	Destroy the joint. If the object is owned with PhysicsJoint.SetOwner then you must provide the owner key it returned. Failing to do so will return a warning and the joint will not be destroyed.
Draw	Draw a PhysicsJoint that visually represents its current state in the world. This is only used in the Unity Editor or in a Development Player. See LowLevelPhysics2D.PhysicsWorld.DrawResults, PhysicsWorld.drawOptions and LowLevelPhysics2D.PhysicsWorld.drawResults.
GetOwner	Get the owner object associated with this joint as specified using PhysicsJoint.SetOwner.
SetOwner	Set the (optional) owner object associated with this joint and return an owner key that must be specified when destroying the joint with PhysicsJoint.Destroy. The physics system provides access to all objects, including the ability to destroy them so this feature can be used to stop accidental destruction of objects that are owned by other objects. You can only set the owner once, multiple attempts will produce a warning. The lifetime of the specified owner object is not linked to this joint i.e. this joint will still be owned by the owner object, even if it is destroyed. It is also valid to not specify an owner object (NULL) to simply gain an owner key however it can be useful, if simply for debugging purposes and discovery, to know which object is the owner.
WakeBodies	Wake the pair of bodies the joint is constraining.

Static Methods

Method	Description
Create	Create a PhysicsRelativeJoint in the specified world.
DestroyBatch	Destroy a batch of joints. Owned joints will produce a warning and will not be destroyed (see PhysicsJoint.SetOwner). Any invalid joints will be ignored.

Operators

Operator	Description
PhysicsJoint	Cast to the base PhysicsJoint.
PhysicsRelativeJoint	Cast to a PhysicsRelativeJoint from the base PhysicsJoint. The provided joint must be a joint type of PhysicsJoint.JointType.RelativeJoint.

Is something described here not working as you expect it to? It might be a Known Issue. Please check with the Issue Tracker at issuetracker.unity3d.com.

Scripting API