# IKComponent.Constraint The update stage object that lets you read and update the current settings of a single constraint in an IK solver. ``` class Constraint ``` ## Overview The settings this object exposes are the runtime editable values of the solver constraint. Initial values are set in [`IKRig.Constraint`](/documentation/RealityKit/IKRig/Constraint). ## Topics ### Structures [`struct DemandOptions`](/documentation/RealityKit/IKComponent/Constraint/DemandOptions) Flags for the different demands types that can be active in a single constraint. ### Instance Properties [`var animationOverrideWeight: (position: Float, rotation: Float)`](/documentation/RealityKit/IKComponent/Constraint/animationOverrideWeight) The blending weights between the FK demand and the your target per demand type. [`var demands: IKComponent.Constraint.DemandOptions`](/documentation/RealityKit/IKComponent/Constraint/demands) The set of the active demands of the constraint. [`let id: IKComponent.Constraint.ID`](/documentation/RealityKit/IKComponent/Constraint/id) ID of the constraint, that is unique within the solver instance. [`var jointID: IKComponent.Joint.ID`](/documentation/RealityKit/IKComponent/Constraint/jointID) The identifier of the constrained rig joint. [`var lookAtTargetPosition: SIMD3`](/documentation/RealityKit/IKComponent/Constraint/lookAtTargetPosition) The point demand which the look-at constraint uses to generate a new orientation demand. [`var name: String`](/documentation/RealityKit/IKComponent/Constraint/name) The name of the constraint as defined in the rig. [`var offset: Transform`](/documentation/RealityKit/IKComponent/Constraint/offset) The offset applied on top of the target transform before the solve. [`var target: Transform`](/documentation/RealityKit/IKComponent/Constraint/target) The packed targets for the positional and orientational demands in model space. ## Relationships ### Conforms To [`Identifiable`](/documentation/Swift/Identifiable) --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)