XMBYTEN4::XMBYTEN4(constfloat*) function (directxpackedvector.h)
Initializes a new instance of XMBYTEN4 from a four element float array argument.
This constructor initializes a new instance of XMBYTEN4 from a from a four element float array argument.
Note This constructor is only available under C++.
Syntax
void XMBYTEN4(
const float *pArray
) noexcept;
Parameters
pArray
Four element float array containing the values used to initialize the four components of a new instance of XMBYTEN4.
Return value
None
Remarks
| Vector Component | Array Element | Range | Description |
|---|---|---|---|
| x | pArray[0] | -1.0, 1.0 | During instantiation, pArray[0] is clamped between -1 and 1, multiplied by 127.0f and assigned to x. |
| y | pArray[1] | -1.0, 1.0 | During instantiation, pArray[1] is clamped between -1 and 1, multiplied by 127.0f, and then assigned to y. |
| z | pArray[2] | -1.0, 1.0 | During instantiation, pArray[2] is clamped between -1 and 1, multiplied by 127.0f, and then assigned to z. |
| w | pArray[3] | -1.0, 1.0 | During instantiation, pArray[3] is clamped between -1 and 1, multiplied by 127.0f, and then assigned to w. |
The following pseudocode demonstrates the operation of this constructor:
XMBYTEN4 instance;
_x1=min( max( pArray[0], -1.0 ), 1.0 );
_y1=min( max( pArray[1], -1.0 ), 1.0 );
_z1=min( max( pArray[2], -1.0 ), 1.0 );
_w1=min( max( pArray[3], -1.0 ), 1.0 );
_x1 = round( _x1 * 127.0f);
_y1 = round( _y1 * 127.0f);
_z1 = round( _z1 * 127.0f);
_w1 = round( _w1 * 127.0f);
instance.x = (int8_t)_x1;
instance.y = (int8_t)_y1;
instance.z = (int8_t)_z1;
instance.w = (int8_t)_w1;
Requirements
| Requirement | Value |
|---|---|
| Target Platform | Windows |
| Header | directxpackedvector.h |