petsc-3.12.5 2020-03-29

SNESSetUpdate

Sets the general-purpose update function called at the beginning of every iteration of the nonlinear solve. Specifically it is called just before the Jacobian is "evaluated".

Synopsis

#include "petscsnes.h"  
PetscErrorCode  SNESSetUpdate(SNES snes, PetscErrorCode (*func)(SNES, PetscInt))

Logically Collective on SNES

Input Parameters

	snes	- The nonlinear solver context
	func	- The function

Calling sequence of func

func (SNES snes, PetscInt step);

step -The current step of the iteration

Note: This is NOT what one uses to update the ghost points before a function evaluation, that should be done at the beginning of your FormFunction() This is not used by most users.

Level

advanced

Location