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Reference API Roblox

HingeConstraint

Constrains its attachments to rotate about a single axis.

Memory categoryPhysicsParts

Member index 15

HistoryMember
553ActuatorType: ActuatorType
553AngularResponsiveness: float
553AngularSpeed: float
553AngularVelocity: float
553CurrentAngle: float
553LimitsEnabled: bool
553LowerAngle: float
605MotorMaxAcceleration: float
553MotorMaxTorque: float
553Radius: float
553Restitution: float
553ServoMaxTorque: float
611SoftlockServoUponReachingTarget: bool
553TargetAngle: float
553UpperAngle: float
inherited from Constraint
553Active: bool
553Attachment0: Attachment
553Attachment1: Attachment
553Color: BrickColor
553Enabled: bool
553Visible: bool
604GetDebugAppliedForce(bodyId: int): Vector3
604GetDebugAppliedTorque(bodyId: int): Vector3
inherited from Instance
553Archivable: bool
635Capabilities: SecurityCapabilities
553Name: string
553Parent: Instance
635Sandboxed: bool
616UniqueId: UniqueId
576AddTag(tag: string): null
573ClearAllChildren(): null
462Clone(): Instance
573Destroy(): null
486FindFirstAncestor(name: string): Instance
486FindFirstAncestorOfClass(className: string): Instance
486FindFirstAncestorWhichIsA(className: string): Instance
486FindFirstChild(name: string, recursive: bool = false): Instance
486FindFirstChildOfClass(className: string): Instance
486FindFirstChildWhichIsA(className: string, recursive: bool = false): Instance
486FindFirstDescendant(name: string): Instance
563GetActor(): Actor
486GetAttribute(attribute: string): Variant
462GetAttributeChangedSignal(attribute: string): RBXScriptSignal
631GetAttributes(): Dictionary
648GetChildren(): Instances
462GetDebugId(scopeLength: int = 4): string
486GetDescendants(): Array
486GetFullName(): string
641GetStyled(name: string): Variant
576GetTags(): Array
576HasTag(tag: string): bool
486IsAncestorOf(descendant: Instance): bool
486IsDescendantOf(ancestor: Instance): bool
580IsPropertyModified(name: string): bool
573Remove(): null
576RemoveTag(tag: string): null
580ResetPropertyToDefault(name: string): null
573SetAttribute(attribute: string, value: Variant): null
462WaitForChild(childName: string, timeOut: double): Instance
648children(): Instances
553clone(): Instance
573destroy(): null
553findFirstChild(name: string, recursive: bool = false): Instance
648getChildren(): Instances
553isDescendantOf(ancestor: Instance): bool
573remove(): null
462AncestryChanged(child: Instance, parent: Instance)
462AttributeChanged(attribute: string)
462ChildAdded(child: Instance)
462ChildRemoved(child: Instance)
462DescendantAdded(descendant: Instance)
462DescendantRemoving(descendant: Instance)
500Destroying()
553childAdded(child: Instance)
inherited from Object
647ClassName: string
647className: string
647GetPropertyChangedSignal(property: string): RBXScriptSignal
647IsA(className: string): bool
650isA(className: string): bool
647Changed(property: string)

Description

A HingeConstraint allows two Attachments to rotate about one axis, constraining the two Attachments so that they both occupy the same position and that their X axes point in the same direction.

Note that if this constraint attaches one part (A) to another part (B) that is anchored or connected to an anchored part (Z), part A will not be locally simulated when interacting with a player.

When configuring this constraint, it may be helpful to study Roblox Units to understand how Roblox units compare to metric units.

Angular Power

Hinges can be configured to actuate rotation. If a hinge's ActuatorType is set to Motor, it attempts to rotate the attachments with the goal of reaching its AngularVelocity. You can further control this rotation through both MotorMaxAcceleration and MotorMaxTorque. If a hinge's ActuatorType is set to Servo, it attempts to rotate to an angle specified by TargetAngle. This rotation is controlled by both AngularSpeed and ServoMaxTorque.

Limits

You can set limits to restrict the rotation of a hinge, useful for mechanisms like doors which should only swing open or closed within a set range. Enabling the LimitsEnabled property exposes the LowerAngle and UpperAngle limits, as well as Restitution which defines the elasticity of the attachments when they reach either limit.

History 62

Members 15

ActuatorType

TypeDefault
ActuatorTypeNone

Sets whether the rotation of the HingeConstraint is actuated and, if so, what kind of actuation.

Note that both actuated and free spinning rotation can be limited by setting LimitsEnabled to true.

Thread safetyReadSafe
CategoryHinge
Loaded/Savedtrue

History 4

AngularResponsiveness

TypeDefault
float45

This property specifies the sharpness of the servo motor in reaching the TargetAngle, when ActuatorType is set to Servo. Larger values correspond to a faster response and smaller values results in more damping and a slower response.

Thread safetyReadSafe
CategoryServo
Loaded/Savedtrue

History 3

AngularSpeed

TypeDefault
float0

The desired angular speed a HingeConstraint with ActuatorType set to Servo will attempt to maintain while rotating towards its TargetAngle. Measured in radians/second.

Thread safetyReadSafe
CategoryServo
Loaded/Savedtrue

History 4

AngularVelocity

TypeDefault
float0

The angular velocity a HingeConstraint with ActuatorType set to Motor will attempt to achieve. Measured in radians/second.

Thread safetyReadSafe
CategoryMotor
Loaded/Savedtrue

History 4

CurrentAngle

TypeDefault
float0

The current angle of the HingeConstraint. This angle is calculated by measuring the angle separation of the Y axes of the Attachments.

This property is not replicated. Its interface does not cross the network boundary.
This property is read-only. Its value can be read, but it cannot be modified.
Thread safetyReadSafe
CategoryDerived
Loaded/Savedfalse/true

History 4

Tags: [ReadOnly, NotReplicated]

LimitsEnabled

TypeDefault
boolfalse

Sets whether the HingeConstraint will limit the range of rotation. If enabled, the constraint will only allow the CurrentAngle to be between LowerAngle and UpperAngle. If the Attachment reach the end of the limited range of rotation then they will stop rotating. If Restitution is greater than 0 then the attachments will bounce when they hit the ends of the limited range.

Thread safetyReadSafe
CategoryHinge
Loaded/Savedtrue

History 4

LowerAngle

TypeDefault
float-45

The minimum rotation angle the HingeConstraint will allow if LimitsEnabled is true. Measured in degrees.

Thread safetyReadSafe
CategoryLimits
Loaded/Savedtrue

History 4

MotorMaxAcceleration

TypeDefault
float500000

The maximum angular acceleration a HingeConstraint with ActuatorType set to Motor can apply to achieve its AngularVelocity. Measured in radians/second².

Thread safetyReadSafe
CategoryMotor
Loaded/Savedtrue

History 5

MotorMaxTorque

TypeDefault
float0

The maximum torque a HingeConstraint with ActuatorType set to Motor can apply when trying to reach its desired AngularVelocity.

Thread safetyReadSafe
CategoryMotor
Loaded/Savedtrue

History 4

Radius

TypeDefault
float0.150000006

The visualized radius of the HingeConstraint.

Thread safetyReadSafe
CategoryAppearance
Loaded/Savedtrue

History 4

Restitution

TypeDefault
float0

How elastic Attachment connected by a HingeConstraint will be when they reach the end of the range when LimitsEnabled is true. Constrained between 0 and 1.

Thread safetyReadSafe
CategoryLimits
Loaded/Savedtrue

History 4

ServoMaxTorque

TypeDefault
float0

The maximum torque a HingeConstraint with ActuatorType set to Servo can apply when trying to reach its desired TargetAngle.

Thread safetyReadSafe
CategoryServo
Loaded/Savedtrue

History 4

SoftlockServoUponReachingTarget

TypeDefault
boolfalse
This property is deprecated. It exists only for backward compatibility, and should not be used for new work.
Thread safetyReadSafe
CategoryServo
Loaded/Savedtrue

History 2

Tags: [Deprecated]

TargetAngle

TypeDefault
float0

The target angle a HingeConstraint will attempt to rotate to if its ActuatorType is set to Servo. Measured in degrees.

Thread safetyReadSafe
CategoryServo
Loaded/Savedtrue

History 4

UpperAngle

TypeDefault
float45

The maximum rotation angle the HingeConstraint will allow if LimitsEnabled is true. Measured in degrees.

Thread safetyReadSafe
CategoryLimits
Loaded/Savedtrue

History 4

Settings