[Home](./index.md) > [rc-js-util](./rc-js-util.md) > [Mat4](./rc-js-util.mat4.md) > [setIdentityMatrix](./rc-js-util.mat4.setidentitymatrix.md) ## Mat4.setIdentityMatrix() method **Signature:** ```typescript setIdentityMatrix(): Mat4; ``` **Returns:** [Mat4](./rc-js-util.mat4.md)<TArray>