# shz_vec4_smoothstepv_safe

Source: https://sh4zam.com/api/vector/shz_vec4_smoothstepv_safe/

> For each component i: returns 0.0f at/below edge0[i], 1.0f at/above edge1[i], smoothly varying in-between. Accepts inverse edges

```c
SHZ_INLINE shz_vec4_t shz_vec4_smoothstepv_safe(shz_vec4_t vec, shz_vec4_t edge0, shz_vec4_t edge1) SHZ_NOEXCEPT;
```

For each component i: returns 0.0f at/below edge0\[i\], 1.0f at/above edge1\[i\], smoothly varying in-between. Accepts inverse edges.

## Parameters

| Name | Type | Description |
| --- | --- | --- |
| `vec` | `shz_vec4_t` |  |
| `edge0` | `shz_vec4_t` |  |
| `edge1` | `shz_vec4_t` |  |

## Returns

`shz_vec4_t`

## Naming and requirements

- `_safe`: Guards degenerate input (zero-length vectors, zero denominators) at a small cost. ([Naming and Suffixes](https://sh4zam.com/concepts/naming-and-suffixes/))

## Availability

- **C++ equivalent:** none (call the C function from C++)
- **Type-generic form:** [`shz_vec_smoothstepv_safe()`](https://sh4zam.com/api/vector/shz_vec_smoothstepv_safe/)
- **Back-ends:** SH4: shared C implementation · SW: portable C · SPU: shared C implementation
- **Defined in:** [`sh4zam/shz_vector.h:324`](https://github.com/gyrovorbis/sh4zam/blob/ba1e30c88d49df0311870b229e1dd860ef26c477/include/sh4zam/shz_vector.h#L324)
- **Module:** [Vector](https://sh4zam.com/api/vector/), section "Component-wise Operations"