atan2
Returns the arctangent of two values (x,y).
ret atan2(y, x) |
---|
Parameters
Item | Description |
---|---|
y |
[in] The y value. |
x |
[in] The x value. |
Return Value
The arctangent of (y,x).
Remarks
The signs of the x and y parameters are used to determine the quadrant of the return values within the range of -π to π. The atan2 HLSL intrinsic function is well-defined for every point other than the origin, even if y equals 0 and x does not equal 0.
Type Description
Name | Template Type | Component Type | Size |
---|---|---|---|
y | same as input x | float | same dimension(s) as input x |
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 |
Requirements
Requirement | Value |
---|---|
Header |
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See also
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