PK_ERROR_code_t PK_FACE_set_approx ( --- received arguments --- int n_faces, --- number of faces to process (>0) const PK_FACE_t faces[] --- faces for which approximations are required ) This function produces an approximate representation of the edges of the supplied faces. This function allows a trade off of memory usage against performance. Some internal routines can make use of an approximate representation of a face. This functions creates such approximations and stores them. Note: this can increase the run-time model size quite significantly.