typedef struct MPIMotionTrapezoidal {
    MPITrajectory   *trajectory;
    double          *position;
} MPIMotionTrapezoidal;

Trapezoidal is a pointer to an array of MPITrajectory structures, representing the trajectory information for Trapezoidal motion.

NOTE: trajectory will point to a single MPITrajectory structure if neither MPIMotionAttrMaskSYNC_START nor MPIMotionAttrMaskSYNC_END are specified. Otherwise, trajectory will point to an array of MPITrajectory structures -- one structure for each axis associated with the motion object.

Please refer to MPIMotionAttrMask for more information.