petsc-3.11.4 2019-09-28
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SNESLineSearchSetPreCheck

 Sets a user function that is called after the initial search direction has been computed but before the line search routine has been applied. Allows the user to adjust the result of (usually a linear solve) that determined the search direction.

Synopsis

#include "petscsnes.h" 
PetscErrorCode  SNESLineSearchSetPreCheck(SNESLineSearch linesearch, PetscErrorCode (*func)(SNESLineSearch,Vec,Vec,PetscBool*,void*),void *ctx)
Logically Collective on SNESLineSearch

Input Parameters

linesearch - the SNESLineSearch context
func - [optional] function evaluation routine, see SNESLineSearchPreCheck() for the calling sequence
ctx - [optional] user-defined context for private data for the function evaluation routine (may be NULL)

Keywords

set, linesearch, pre-check

See Also

SNESGetLineSearch(), SNESLineSearchPreCheck(), SNESLineSearchSetPostCheck(), SNESLineSearchGetPostCheck(), SNESLineSearchGetPreCheck()

Level

intermediate

Location

src/snes/linesearch/interface/linesearch.c

Examples

src/snes/examples/tutorials/ex3.c.html
src/snes/examples/tutorials/ex15.c.html

Index of all SNES routines
Table of Contents for all manual pages
Index of all manual pages