[Home](./index.md) > [rc-js-util](./rc-js-util.md) > [IReadonlyVec3](./rc-js-util.ireadonlyvec3.md) ## IReadonlyVec3 interface [Vec3](./rc-js-util.vec3.md). **Signature:** ```typescript export interface IReadonlyVec3 extends TPickExcept>, "update" | "setX" | "setY" | "setZ" | "copyFromBuffer" | TTypedArrayTupleMutativeMethods> ``` **Extends:** [TPickExcept](./rc-js-util.tpickexcept.md)<Readonly<[Vec3](./rc-js-util.vec3.md)<TArray>>, "update" \| "setX" \| "setY" \| "setZ" \| "copyFromBuffer" \| [TTypedArrayTupleMutativeMethods](./rc-js-util.ttypedarraytuplemutativemethods.md)>