Platform SDK: DirectX |
The D3DXPlaneDotCoord function computes the dot-product of a plane and a 3-D vector. The w parameter of the vector is assumed to be 1.
float D3DXPlaneDotCoord( const D3DXPLANE* pP, const D3DXVECTOR3* pV );
The dot-product of the given plane and 3-D vector.
Given a plane (a, b, c, d) and a 3-D 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 3-D space.
Windows NT/2000: Requires Windows 2000.
Windows 95/98: Requires Windows 95 or later. Available as a redistributable for Windows 95.
Version: Requires DirectX 7.0.
Header: Declared in d3dxmath.h.
Library: Use d3dx.lib.