[Home](./index.md) > [rc-js-util](./rc-js-util.md) > [Vec2](./rc-js-util.vec2.md) > [mat3Multiply](./rc-js-util.vec2.mat3multiply.md) ## Vec2.mat3Multiply() method **Signature:** ```typescript mat3Multiply(_mat: IReadonlyMat3, _result?: Vec2): Vec2; ``` ## Parameters

Parameter	Type	Description
\_mat	[IReadonlyMat3](./rc-js-util.ireadonlymat3.md)<[TTypedArray](./rc-js-util.ttypedarray.md)>
\_result	[Vec2](./rc-js-util.vec2.md)<TResult>	_(Optional)_

**Returns:** [Vec2](./rc-js-util.vec2.md)<TResult>