XMU555::XMU555(constfloat*,bool) function (directxpackedvector.h)
Initializes a new instance of XMU555 from a three element float array and one bool argument.
This constructor initializes a new instance of XMU555 from a three element float array (specifying x-, y- and z-components) and one bool argument (specifying a w-component).
Syntax
void XMU555(
const float *pArray,
bool _w
) noexcept;
Parameters
pArray
Three element floating point array containing the values used to initialize the x-, y- and z-components of a new instance of XMU555.
_w
The value of the instance's w-component.
Return value
None
Remarks
Array elements and the _w argument are mapped to the vector components of a new instance of XMU555 as follows:
| XMU555 Member | Argument | Range |
|---|---|---|
| x | pArray[0] | 0.0, 31.0 |
| y | pArray[1] | 0.0, 31.0 |
| z | pArray[2] | 0.0, 31.0 |
| w | _w | 0.0, 1.0 |
Arguments to the constructors will be clamped to the permitted range prior to assignment to the appropriate member of XMU555.
The following pseudocode demonstrates the operation of this constructor, which takes advantage of the union of the four components of the XMU555 vector with an instance of uint16_t in the definition of the structure:
XMU555 instance;
_x1=min( max( pArray[0], 0.0 ), 31.0 );
_y1=min( max( pArray[1], 0.0 ), 31.0 );
_z1=min( max( pArray[2], 0.0 ), 31.0 );
_w1=min( max( _w, 0 ), 1 );
instance.v = (((uint16_t)_w1 ? 0x8000 : 0) |
(((uint16_t)_z1 & 0x1F) << 10) |
(((uint16_t)_y1 & 0x1F) << 5) |
(((uint16_t)_x1 & 0x1F)));
Requirements
| Requirement | Value |
|---|---|
| Target Platform | Windows |
| Header | directxpackedvector.h |