Returns the area of the bounding box.

Convert body absolute/world coordinates to relative/local coordinates.

TODO should move this to the cpVect API. It's pretty useful.

Frees the old table, and allocate a new one.

Reindex a single object in the spatial index.

Clamp @c f to be between 0 and 1.

Returns a normalized copy of v or cpvzero if v was already cpvzero. Protects against divide by zero errors.

Returns the angular direction v is pointing in (in radians).

** Register a normal function ** Params: db, function name, number arguments, [ callback | step, finalize], user data ** Returns: true on sucess ** **

Calculates dot product of two points. @return float @since v2.1.4 */

@brief Release the shared Engine object @warning It must be called before the application exit, or a memroy leak will be casued. */