UnsafeNativeMethods.Plane.Dot(Plane,Vector4) Method (Microsoft.DirectX)
Computes the dot product of a plane and a vector.
Note: For programming in Microsoft Visual Basic .NET or Microsoft JScript .NET, use the equivalent method in the Microsoft.DirectX structures.
Definition
Visual Basic Public Shared Function Dot( _
ByVal pPlane As Plane, _
ByVal pV As Vector4 _
) As SingleC# public static float Dot(
Plane pPlane,
Vector4 pV
);C++ public:
static float Dot(
Plane pPlane,
Vector4 pV
);JScript public static function Dot(
pPlane : Plane,
pV : Vector4
) : float;
Parameters
pPlane Microsoft.DirectX.Plane
Source Plane structure.pV Microsoft.DirectX.Vector4
Source Vector4 structure.
Return Value
System.Single
A Single value that is the dot product of the plane and the vector.
Remarks
Given a plane (a, b, c, d) and a 4-D vector (x, y, z, w), this method's return value is
a*x + b*y + c*z + d*w
. The Dot method is useful for determining the plane's relationship with a homogeneous coordinate. For example, it can determine whether a coordinate is on a particular plane, or on which side of a particular plane a coordinate lies.Given a plane (a, b, c, d) and a 3-D vector (x, y, z), this method's return value is
a*x + b*y + c*z + d*1
. The Dot method is useful for determining the plane's relationship with a coordinate in 3-D space.
See Also