# shz_mat4x4_init_frustum

Source: https://sh4zam.com/api/matrix/shz_mat4x4_init_frustum/

```c
SHZ_INLINE void shz_mat4x4_init_frustum(shz_mat4x4_t* mat, float left, float right, float bottom, float top, float znear, float zfar) SHZ_NOEXCEPT;
```

Initializes the given matrix to a frustum projection matrix.

## Parameters

| Name | Type | Description |
| --- | --- | --- |
| `mat` | `shz_mat4x4_t *` |  |
| `left` | `float` |  |
| `right` | `float` |  |
| `bottom` | `float` |  |
| `top` | `float` |  |
| `znear` | `float` |  |
| `zfar` | `float` |  |

## Returns

Nothing (`void`).

## Warnings

- This routine clobbers XMTRX.

## Naming and requirements

- `shz_mat4x4_t` and `shz_mat2x2_t` arguments must be 8-byte aligned. Unaligned data goes through the `float[16]` parameters of the `_unaligned` routines.

## Availability

- **C++ equivalent:** [`shz::mat4x4::init_frustum`](https://sh4zam.com/api/cpp/mat4x4/#init_frustum)
- **Type-generic form:** none
- **Back-ends:** SH4: shared C implementation · SW: portable C · SPU: shared C implementation
- **Defined in:** [`sh4zam/shz_matrix.h:274`](https://github.com/gyrovorbis/sh4zam/blob/ba1e30c88d49df0311870b229e1dd860ef26c477/include/sh4zam/shz_matrix.h#L274)
- **Module:** [Matrix](https://sh4zam.com/api/matrix/), section "Initialization"