D3DXPlaneDotCoord function
Note
The D3DX utility library is deprecated. We recommend that you use DirectXMath instead.
Computes the dot product of a plane and a 3D vector. The w parameter of the vector is assumed to be 1.
Syntax
FLOAT D3DXPlaneDotCoord(
_In_ const D3DXPLANE *pP,
_In_ const D3DXVECTOR3 *pV
);
Parameters
-
pP [in]
-
Type: const D3DXPLANE*
Pointer to a source D3DXPLANE structure.
-
pV [in]
-
Type: const D3DXVECTOR3*
Pointer to a source D3DXVECTOR3 structure.
Return value
Type: FLOAT
The dot product of the plane and 3D vector.
Remarks
Given a plane (a, b, c, d) and a 3D vector (x, y, z) the return value of this function is a*x + b*y + c*z + d*1. The D3DXPlaneDotCoord function is useful for determining the plane's relationship with a coordinate in 3D space.
Requirements
| Requirement | Value |
|---|---|
| Header |
|
| Library |
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See also