petsc-master 2019-12-10
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SNESNewtonTRSetPreCheck

Sets a user function that is called before the search step has been determined. Allows the user a chance to change or override the decision of the line search routine.

Synopsis

#include "petscsnes.h"   
PetscErrorCode  SNESNewtonTRSetPreCheck(SNES snes, PetscErrorCode (*func)(SNES,Vec,Vec,PetscBool*,void*),void *ctx)
Logically Collective on snes

Input Parameters

snes - the nonlinear solver object
func - [optional] function evaluation routine, see SNESNewtonTRPreCheck() for the calling sequence
ctx - [optional] user-defined context for private data for the function evaluation routine (may be NULL)

Note: This function is called BEFORE the function evaluation within the SNESNEWTONTR solver.

See Also

SNESNewtonTRPreCheck(), SNESNewtonTRGetPreCheck(), SNESNewtonTRSetPostCheck(), SNESNewtonTRGetPostCheck()

Level

intermediate

Location

src/snes/impls/tr/tr.c
Index of all SNES routines
Table of Contents for all manual pages
Index of all manual pages