PK_REGION_ask_regions_adjacent

PK_ERROR_code_t PK_REGION_ask_regions_adjacent
(
--- received arguments ---
PK_REGION_t     region,             --- a region

--- returned arguments ---
int            *n_regions_adjacent, --- number of adjacent regions
PK_REGION_t   **regions_adjacent    --- adjacent regions ( may be NULL )
)


This function returns all regions which are immediately adjacent to the given
region.


An adjacent region is one which shares a face with the given region.