Working from the example given in this chapter, write a function named calculateTrajectory(oldPosition, newPosition, speed), which pre-calculates the velocity vector and other necessary parameters of...

Working from the example given in this chapter, write a function named calculateTrajectory(oldPosition, newPosition, speed), which pre-calculates the velocity vector and other necessary parameters of a movement. The function should end up with the same set of parameters given by the calculateTrajectory () in this chapter.