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NF:directxpackedvector.XMLoadDec4 |
XMLoadDec4 function (directxpackedvector.h) |
Loads an XMDEC4 into an XMVECTOR. |
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dxmath\xmloaddec4.htm |
dxmath |
M:Microsoft.directx_sdk.loading.XMLoadDec4(const XMDEC4) |
12/05/2018 |
DirectX::PackedVector.XMLoadDec4, XMLoadDec4, XMLoadDec4 method [DirectX Math Support APIs], dxmath.xmloaddec4 |
directxpackedvector.h |
DirectXMath.h |
Windows |
DirectX::PackedVector |
Windows |
19H1 |
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Loads an XMDEC4 into an XMVECTOR.
Address of the XMDEC4 structure to load.
Returns an XMVECTOR loaded with the data from the pSource parameter.
The following pseudocode demonstrates the operation of the function.
XMVECTOR vectorOut;
uint32_t Element;
static const uint32_t SignExtend[] = {0x00000000, 0xFFFFFC00};
static const uint32_t SignExtendW[] = {0x00000000, 0xFFFFFFFC};
Element = pSource->v & 0x3FF;
vectorOut.x = (float)(int16_t)(Element | SignExtend[Element >> 9]);
Element = (pSource->v >> 10) & 0x3FF;
vectorOut.y = (float)(int16_t)(Element | SignExtend[Element >> 9]);
Element = (pSource->v >> 20) & 0x3FF;
vectorOut.z = (float)(int16_t)(Element | SignExtend[Element >> 9]);
Element = pSource->v >> 30;
vectorOut.w = (float)(int16_t)(Element | SignExtendW[Element >> 1]);
return vectorOut;