DXVEC structure

Describes either a continuous or a discrete four-dimensional (4-D) vector.

Syntax

typedef struct DXVEC {
  DXBNDTYPE eType;
  union {
    long     D[4];
    LONGLONG LD[4];
    float    C[4];
    double   LC[4];
  };
} DXVEC;

eType
DXBNDTYPE enumeration that specifies which member of the union to use.
D
Discrete, 32-bit 4-D vector.
LD
Discrete, 64-bit 4-D vector.
C
Continuous, 32-bit 4-D vector.
LC
Continuous, 64-bit 4-D vector.

Four-dimensional vectors consist of an x-coordinate, a y-coordinate, a z-coordinate, and a time coordinate.