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Reference API Roblox

UniversalConstraint

Ensures two axes on two bodies remain perpendicular.

Memory categoryBaseParts

Member index 4

HistoryMember
726LimitsEnabled: bool
726MaxAngle: float
726Radius: float
726Restitution: float
inherited from Constraint
726Active: bool
726Attachment0: Attachment
726Attachment1: Attachment
726Color: BrickColor
726Enabled: bool
726Visible: bool
604GetDebugAppliedForce(bodyId: int): Vector3
604GetDebugAppliedTorque(bodyId: int): Vector3
inherited from Instance
726Archivable: bool
726Capabilities: SecurityCapabilities
726IsInSandbox: bool
726Name: string
726Parent: Instance
726PredictionMode: PredictionMode
726Sandboxed: bool
726UniqueId: 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
707GetDescendants(): Instances
486GetFullName(): string
706GetStyled(name: string, selector: string?): Variant
657GetStyledPropertyChangedSignal(property: string): RBXScriptSignal
576GetTags(): Array
576HasTag(tag: string): bool
486IsAncestorOf(descendant: Instance): bool
486IsDescendantOf(ancestor: Instance): bool
664IsPropertyModified(property: string): bool
698QueryDescendants(selector: string): Instances
573Remove(): null
576RemoveTag(tag: string): null
664ResetPropertyToDefault(property: string): null
573SetAttribute(attribute: string, value: Variant): null
462WaitForChild(childName: string, timeOut: double): Instance
726children(): Instances
726clone(): Instance
726destroy(): null
726findFirstChild(name: string, recursive: bool = false): Instance
726getChildren(): Instances
726isDescendantOf(ancestor: Instance): bool
726remove(): null
462AncestryChanged(child: Instance, parent: Instance)
462AttributeChanged(attribute: string)
462ChildAdded(child: Instance)
462ChildRemoved(child: Instance)
462DescendantAdded(descendant: Instance)
462DescendantRemoving(descendant: Instance)
500Destroying()
657StyledPropertiesChanged()
726childAdded(child: Instance)
inherited from Object
726ClassName: string
726className: string
647GetPropertyChangedSignal(property: string): RBXScriptSignal
647IsA(className: string): bool
726isA(className: string): bool
647Changed(property: string)

Description

A UniversalConstraint ensures two axes on two bodies remain perpendicular. Contextually, this constraint is more restrictive than a BallSocketConstraint but less restrictive than a HingeConstraint by one degree of freedom.

Example applications of this constraint include transmitting power between the transmission and drive shafts of cars, robotics, and more.

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

Limits

Enabling the LimitsEnabled property exposes the MaxAngle limit to restrict tilt within a cone, as well as Restitution which defines the elasticity of the attachments when they reach the limit.

History 18

Members 4

LimitsEnabled

TypeDefault
bool

This property, when enabled, limits the relative angular motion of the primary axes of attachments through a cone constraint. The default value is false.

Thread safetyReadSafe
CategoryUniversal
Loaded/Savedtrue

History 4

MaxAngle

TypeDefault
float

This property determines the max angle, in degrees, of the constraint's limiting cone, formed from Attachment0 and its primary axis. The default value is 45 degrees.

In order for this property to take affect, the constraint's LimitsEnabled property must be set to true.

Thread safetyReadSafe
CategoryLimits
Loaded/Savedtrue

History 4

Radius

TypeDefault
float

This property indicates the constraint's visualization radius, in studs. Default value is 0.2.

Thread safetyReadSafe
CategoryAppearance
Loaded/Savedtrue

History 4

Restitution

TypeDefault
float

This property determines the restitution of the two Attachments connected by the UniversalConstraint when they reach the end of the range specified by MaxAngle. The value defaults to 0 and can be any floating number in the range of 0 to 1. Only applies when LimitsEnabled is set to true.

Thread safetyReadSafe
CategoryLimits
Loaded/Savedtrue

History 4

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