XMVectorTruncate function (directxmath.h)

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

Requirements

See also

Vector Arithmetic Functions