D3DXQuaternionBaryCentric Function

Returns a quaternion in Barycentric coordinates.

Syntax

D3DXQUATERNION *D3DXQuaternionBaryCentric(      

    D3DXQUATERNION *pOut,
    CONST D3DXQUATERNION *pQ1,
    CONST D3DXQUATERNION *pQ2,
    CONST D3DXQUATERNION *pQ3,
    FLOAT f,
    FLOAT g
);

Parameters

pOut

[in, out] Pointer to the D3DXQUATERNION structure that is the result of the operation.

pQ1

[in] Pointer to a source D3DXQUATERNION structure.

pQ2

[in] Pointer to a source D3DXQUATERNION structure.

pQ3

[in] Pointer to a source D3DXQUATERNION structure.

f

[in] Weighting factor. See Remarks.

g

[in] Weighting factor. See Remarks.

Return Value

Pointer to a D3DXQUATERNION structure in Barycentric coordinates.

Remarks

To compute the Barycentric coordinates, the D3DXQuaternionBaryCentric function implements the following series of spherical linear interpolation operations: Slerp(Slerp(Q1, Q2, f+g), Slerp(Q1, Q3, f+g), g/(f+g))

The return value for this function is the same value returned in the pOut parameter. In this way, the D3DXQuaternionBaryCentric function can be used as a parameter for another function.

Function Information

Header	d3dx9math.h
Import library	d3dx9.lib
Minimum operating systems	Windows 98