Describes a plane.
typedef struct D3DXPLANE {
FLOAT a;
FLOAT b;
FLOAT c;
FLOAT d;
} D3DXPLANE, *LPD3DXPLANE;
The members of the D3DXPLANE structure take the form of the general plane equation. They fit into the general plane equation so that ax + by + cz + dw = 0.
C++ programmers can take advantage of operator overloading and type casting with the D3DXPLANE Extensions which implement overloaded constructors and assignment, unary, and binary (including equality) operators.