XMUBYTEN4 union

A 3D vector for storing unsigned, normalized values as signed 8-bits (1 byte) integers.

For a list of additional functionality such as constructors and operators that are available using XMUBYTEN4 when you are programming in C++, see XMUBYTEN4 Extensions.

Note   See DirectXMath Library Type Equivalences for information about equivalent D3DDECLTYPE, D3DFORMAT, and DXGI_FORMAT objects.

Syntax


union XMUBYTEN4 {
  union {
    struct {
      uint8_t x;
      uint8_t y;
      uint8_t z;
      uint8_t w;
    };
    uint32_t v;
  };
};

Members

x

Unsigned 8-bit integer value in the range [0, 255] describing the x-coordinate of the vector.

y

Unsigned 8-bit integer value in the range [0, 255] describing the y-coordinate of the vector.

z

Unsigned 8-bit integer value in the range [0, 255] describing the z-coordinate of the vector.

w

Unsigned 8-bit integer value in the range [0, 255] describing the w-coordinate of the vector.

v

Unsigned 32-bit integer representing the 4D vector.

Remarks

Those XMUBYTEN4 constructors using floating point arguments require normalized input, which must be in the range of [0.0.-1.0]. During instantiation, these data are multiplied by 255.0f, results are rounded, and then assigned to the appropriate members of XMUBYTEN4.

XMUBYTEN4 can be used to load instances of XMVECTOR from normalized values, by using XMLoadUByteN4, which divides each component 255.0f, rounds the result, and then assigns the components to an XMVECTOR instance.

XMVECTOR instances containing normalized values can be stored into XMUBYTEN4 using XMStoreUByteN4, which multiplies each component by 255.0f, rounding the result, before assigning the values to the appropriate XMUBYTEN4 members.

Namespace: Use DirectX::PackedVector

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

Header

DirectXPackedVector.h

See also

XMUBYTEN4 Extensions

 

 

Community Additions

ADD
Show:
© 2014 Microsoft