Table 3.
Definitions of translational and spiral motion directions.
| Direction in degrees | Linear Motion | Spiral Motion |
|---|---|---|
| 0° | Up | Expansion |
| 45° | Diagonal up and right | Clockwise outward spiral |
| 90° | Right | Clockwise rotation |
| 135° | Diagonal down and right | Clockwise inward spiral |
| 180° | Down | Contraction |
| 225° | Diagonal down and left | Counterclockwise inward spiral |
| 270° | Left | Counterclockwise rotation |
| 315° | Diagonal up and left | Counterclockwise outward spiral |
Note that the definition for translational motion deviates from the geometric convention where 0° is rightward and angle increases in counterclockwise direction; instead 0° is defined as upward motion and angle increases in the clockwise direction.