XMVectorTruncate function (directxmath.h)

Article
02/22/2024

Rounds each component of a vector to the nearest integer value in the direction of zero.

Syntax

XMVECTOR XM_CALLCONV XMVectorTruncate(
  [in] FXMVECTOR V
) noexcept;

Parameters

[in] V

Vector whose components are to be truncated.

Return value

Returns a vector whose components are rounded to the nearest integer value in the direction of zero.

Remarks

The return value is computed based on the following logic, which preserves special values (INF,+INF,NaN,-NaN).


Result[0] = (fabsf(V[0]) < 8388608.0f) ? ((float)((int32_t)V[0])) : V[0];
Result[1] = (fabsf(V[1]) < 8388608.0f) ? ((float)((int32_t)V[1])) : V[1];
Result[2] = (fabsf(V[2]) < 8388608.0f) ? ((float)((int32_t)V[2])) : V[2];
Result[3] = (fabsf(V[3]) < 8388608.0f) ? ((float)((int32_t)V[3])) : V[3];

Platform Requirements

Microsoft Visual Studio 2010 or Microsoft Visual Studio 2012 with the Windows SDK for Windows 8. Supported for Win32 desktop apps, Windows Store apps, and Windows Phone 8 apps.

Requirements

Requirement	Value
Target Platform	Windows
Header	directxmath.h (include DirectXMath.h)

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