modf

Splits the value x into fractional and integer parts, each of which has the same sign as x.

ret modf(x, out ip)

Parameters

Item	Description
x	[in] The x input value.
ip	[out] The integer portion of x.

Return Value

The signed-fractional portion of x.

Type Description

Name	In/Out	Template Type	Component Type	Size
x	in	scalar, vector, or matrix	float, int	any
ip	out	same as input x	float, int	same dimension(s) as input x
ret	out	same as input x	float, int	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)	yes (vs_1_1 only)

Requirements

Requirement	Value
Header	Corecrt_math.h

See also

Intrinsic Functions (DirectX HLSL)