atan
Returns the arctangent of the specified value.
| ret atan(x) |
|---|
Parameters
| Item | Description |
|---|---|
| x |
[in] The specified value. |
Return Value
The arctangent of the x parameter. This value is within the range of -π/2 to π/2.
Type Description
| Name | Template Type | Component Type | Size |
|---|---|---|---|
| x | scalar, vector, or matrix | float | any |
| ret | same as input x | float | same dimension(s) as input x |
Minimum Shader Model
This function is supported in the following shader models.
| Shader Model | Supported |
|---|---|
| Shader Model 2 (DirectX HLSL) and higher shader models | yes |
| Shader Model 1 (DirectX HLSL) | vs_1_1 |