petsc-3.8.4 2018-03-24

SNESLineSearchPreCheckFunction

form of function passed to check the search direction before line search is called

#include <petscsnes.h>
SNESLineSearchPreCheckFunction(SNESLineSearch snes,Vec x,Vec y, PetscBool *changed);

	x	- solution vector
	y	- search direction vector
	changed	- flag to indicate the precheck changed x or y.

Note: This is NOTE a PETSc function, rather it documents the calling sequence of functions passed to SNESLineSearchSetPreCheck() and SNESLineSearchGetPreCheck()