XMBYTEN2 Structure

A 2D vector for storing signed, normalized values as signed 8-bits (1 byte) integers.

If you are programming in C++, you can use the constructors and operator methods of this structure.

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

Syntax

struct XMBYTEN2  

Remarks

The fields in the XMBYTEN2 structure are declared as follows:

struct XMBYTEN2
{
    union
    {
        struct
        {
            int8_t x; // Signed 8-bit integer value in the range [-127, 127] 
                      // describing the x-coordinate of the vector.
            int8_t y; // Signed 8-bit integer value in the range [-127, 127] 
                      // describing the y-coordinate of the vector.
        };
        uint16_t v; // Unsigned 16-bit integer representing the 2D vector.
    };  

Those XMBYTEN2 constructors using floating point arguments require normalized input, which must be in the range of [0.0.-1.0]. During instantiation, this data is multiplied by 127.0f, results are rounded, and then assigned to the appropriate members of XMBYTEN2.

XMBYTEN2 can be used to load instances of XMVECTOR from normalized values, by using XMLoadByteN2, which divides each component 127.0f, rounds the result, and then assigns the components to an XMVECTOR instance.

XMVECTOR instances containing normalized values can be stored into XMBYTEN2 using XMStoreByteN2, which multiplies each component by 127.0f, rounding the result, before assigning the values to the appropriate XMBYTEN2 members.

Namespace: Use DirectX::PackedVector

Requirements

Header: Declared in directxpackedvector.h.