|Microsoft DirectX 9.0|
Computes the dot product of a plane and a 4-D vector.
CONST D3DXPLANE *pP, CONST D3DXVECTOR4 *pV );
The dot product of the plane and 4-D vector.
Given a plane (a, b, c, d) and a 4-D vector (x, y, z, w) the return value of this function is a*x + b*y + c*z + d*w. The D3DXPlaneDot function is useful for determining the plane's relationship with a homogeneous coordinate. For example, this function could be used to determine if a particular coordinate is on a particular plane, or on which side of a particular plane a particular coordinate lies.
Header d3dx9math.h Import library d3dx9.lib Minimum operating systems Windows 98