[Home](./index.md) > [server](./server.md) > [Matrix4](./server.matrix4.md) > [frustrum](./server.matrix4.frustrum.md) ## Matrix4.frustrum() method Sets the current matrix to a frustrum matrix with the given bounds. **Signature:** ```typescript frustrum(left: number, right: number, bottom: number, top: number, near: number, far: number): Matrix4; ``` ## Parameters

Parameter	Type	Description
left	number	The left bound of the projection.
right	number	The right bound of the projection.
bottom	number	The bottom bound of the projection.
top	number	The top bound of the projection.
near	number	The near bound of the projection.
far	number	The far bound of the projection.

**Returns:** [Matrix4](./server.matrix4.md) The current matrix.