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XMFLOAT3PK::XMFLOAT3PK(float,float,float) function (directxpackedvector.h)

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Initializes a new instance of XMFLOAT3PK from three float arguments.

This constructor initializes a new instance of XMFLOAT3PK from three float arguments.

Note  This constructor is only available under C++.
 

Syntax

void XMFLOAT3PK(
  float _x,
  float _y,
  float _z
) noexcept;

Parameters

_x

Value to be stored in the x-component of the new instance of XMFLOAT3PK.

The value stored is transformed from the standard 32 floating point format (sign bit, 8 bit exponent, 23 bit mantissa), to an 11 bit floating point format (5 bit exponent, 6 bit mantissa).

_y

Value to be stored in the y-component of the new instance of XMFLOAT3PK.

The value stored is transformed from the standard 32 floating point format (sign bit, 8 bit exponent, 23 bit mantissa), to an 11 bit floating point format (5 bit exponent, 6 bit mantissa). As the target format does not support a sign bit, _y must be greater than zero.

_z

Value to be stored in the x-component of the new instance of XMFLOAT3PK.

The value stored is transformed from the standard 32 floating point format (sign bit, 8 bit exponent, 23 bit mantissa), to a 10 bit floating point format (5 bit exponent, 5 bit mantissa). As the target format does not support a sign bit, _z must be greater than zero.

Return value

None

Remarks

As the floating point storage formats used by XMFLOAT3PK do not support a sign bit, all arguments to this constructor must be greater than or equal to zero.

Because of the change in floating point format during the instantiation of an instance of XMFLOAT3PK, some loss of precision can be expected.

Requirements

Requirement Value
Target Platform Windows
Header directxpackedvector.h

See also

Reference

XMFLOAT3PK

XMFLOAT3PK Constructors