XMSHORTN2 Structure

A 2D vector for storing signed, normalized values as signed 16-bit integers (type int16_t).

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 XMSHORTN2  

Remarks

The fields in the XMSHORTN2 structure are declared as follows:

struct XMSHORTN2
{
    union
    {
        struct
        {
            int16_t x; // Signed integer in the range [-32767, 32767] 
                       // describing the x coordinate of the vector.
            int16_t y; // Signed integer in the range [-32767, 32767] 
                       // describing the y coordinate of the vector.
        };
        uint32_t v; // Unsigned 32-bit integer representing the 2D vector.
    };  

Those XMSHORTN2 constructors using floating point arguments require normalized input, which must be in the range of [-1.0.-1.0]. During instantiation, data is multiplied by 32767.0f, results are rounded, and then assigned to the appropriate members of XMSHORTN2.

You can use XMSHORTN2 to load instances of XMVECTOR from normalized values by using XMLoadShortN2, which divides each component 32767.0f, rounds the result, and then assigns the components to an XMVECTOR instance.

You can store XMVECTOR instances containing normalized values into XMSHORTN2 using XMStoreShortN2, which multiplies each component by 32767.0f, rounding the result, before assigning the values to the appropriate XMSHORTN2 members.

Namespace: Use DirectX::PackedVector

Requirements

Header: Declared in directxpackedvector.h.