One face as a hint records it: its surface type, its area as a fraction of the body's, its
centre as fractions of the body's bounding box, its unit normal, and the names of the faces next
to it, sorted. Fractions keep a hint true when the body grows or shrinks with its parameters.
One face as a hint records it: its surface
type, itsareaas a fraction of the body's, itscentreas fractions of the body's bounding box, its unitnormal, and the names of the faces next to it, sorted. Fractions keep a hint true when the body grows or shrinks with its parameters.