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trunc

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Truncates a floating-point value to the integer component.

ret trunc(x)

Parameters

Item Description
x
 [in] The specified input.

Return Value

The input value truncated to an integer component.

Remarks

This function truncates a floating-point value to the integer component. Given a floating-point value of 1.6, the trunc function would return 1.0, whereas the round (DirectX HLSL) function would return 2.0.

Type Description

Name Template Type Component Type Size
x scalar, vector, or matrix float any
ret Same type 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 1 (DirectX HLSL) and higher shader models yes

Requirements

Requirement Value
Header
Corecrt_math.h

See also

Intrinsic Functions (DirectX HLSL)