Applying the four basic Jings along various axis of direction, I've come up with seven basic directional Jings. There may be more of these basic Jings, since I could have missed a direction or two.
Down. This is simply Weight-Dropping Jing.
Up. This is simply Ground Jing, possibly combined with extend-retract Jing in the back and arms to add momentum.
Turning Left and Right ("Grinding".) This is Turning Jing at the basic level, using the opening and closing of the joints, such as the armpits and Kua (hips/loin area.) At later levels, Ground Jing is added from the back leg to provide extra force, and more Turning Jing is recruited from the limbs themselves to create a coiling motion.
Turning Up and Down in a Direction Forward and Back from the Opponent. ("Wheeling".) This relies first on Ground Jing to provide the forward force, and to store enegy while the body drops back and down. It also relies on Weight-Dropping Jing as the weight of the body shifts back and forth from the front to the back legs.
Moving Forward. This is the same as Turning Up and Down, but with the possible addition of Extending-Retracting Jing in the striking limb. Furthermore, since the body is moving, the Weight-Dropping Jing is not simply dropping or shifting, but also moving forward.
Moving Backward. This is like Moving Forward, except the energies go backward instead of forward. The front leg acts as the back leg in Moving Forward, producing Ground Jing. The use of Weight-Dropping and Extending-Retracting Jing is the same.
Turning Up and Down while Facing the Opponent (as in Taiji's "Wave Hands Like Clouds," or Baji's Circle Fist.) This relies on Turning Jing to generate the left to right motion, Weight-Dropping Jing to generate the down motion, and Ground Jing to generate the raising motion. And of course, you can add Extending-Retracting Jing to increase power at the focus.
Many other Jings can be formed by further combini