XMVectorSwizzle method
Swizzles a vector.
Syntax
XMVECTOR XMVectorSwizzle( [in] XMVECTOR V, [in] uint32_t E0, [in] uint32_t E1, [in] uint32_t E2, [in] uint32_t E3 );
Parameters
- V [in]
-
Vector to swizzle.
- E0 [in]
-
Index that describes which component of V to place in the x-component of the swizzled vector. A value of 0 selects the x-component, 1 selects the y-component, 2 selects the z-component, and 3 selects the w-component.
- E1 [in]
-
Index that describes which component of V to place in the y-component of the swizzled vector. A value of 0 selects the x-component, 1 selects the y-component, 2 selects the z-component, and 3 selects the w-component.
- E2 [in]
-
Index that describes which component of V to place in the z-component of the swizzled vector. A value of 0 selects the x-component, 1 selects the y-component, 2 selects the z-component, and 3 selects the w-component.
- E3 [in]
-
Index that describes which component of V to place in the w-component of the swizzled vector. A value of 0 selects the x-component, 1 selects the y-component, 2 selects the z-component, and 3 selects the w-component.
Return value
Returns the swizzled XMVECTOR.
Remarks
The following code demonstrates how this function might be used.
XMVECTOR v = XMVectorSet( 10.0f, 20.0f, 30.0f, 40.0f ); XMVECTOR result = XMVectorSwizzle(v, 3, 3, 0, 2 );
The swizzled vector (result) will be <40.0f, 40.0f, 10.0f, 30.0f>.
XM_SWIZZLE_X, XM_SWIZZLE_Y, XM_SWIZZLE_Z, and XM_SWIZZLE_W are constants which
evaluate to 0, 1, 2, and 3 respectively for use with XMVectorSwizzle.
This is identical to XM_PERMUTE_0X, XM_PERMUTE_0Y, XM_PERMUTE_0Z, and XM_PERMUTE_0W.
For the case of constant indices (E0, E1, E2, E3), it is much more efficent to use the template form of XMVectorSwizzle:
template<uint32_t SwizzleX, uint32_t SwizzleY, uint32_t SwizzleZ, uint32_t SwizzleW>
XMVECTOR XMVectorSwizzle(FXMVECTOR V)
Example: XMVectorSwizzle< 3, 3, 0, 2>(v);
Platform Requirements
Microsoft Visual Studio 2010 or Microsoft Visual Studio 2012 with the Windows SDK for Windows 8. Supported for Win32 desktop apps, Windows Store apps, and Windows Phone 8 apps.
Requirements
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Use DirectX. |
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See also