[Home](./index.md) > [rc-js-util](./rc-js-util.md) > [Mat3](./rc-js-util.mat3.md) > [setIdentityMatrix](./rc-js-util.mat3.setidentitymatrix.md) ## Mat3.setIdentityMatrix() method **Signature:** ```typescript setIdentityMatrix(): Mat3; ``` **Returns:** [Mat3](./rc-js-util.mat3.md)<TArray>