PK_FACE_ask_shells

PK_ERROR_code_t PK_FACE_ask_shells
(
--- received arguments ---
PK_FACE_t       face,              --- a face

--- returned arguments ---
PK_SHELL_t      shells[2]          --- pair of shells
)


This function returns the shells of the given face.


The first entry in the array 'shells' will be the shell to the back of the
face, and the second will be to the front. These shells may be the same.

The face normal points into the volume bounded by the front shell.