SNESNewtonTRDCSetPreCheck#

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

Synopsis#

#include "petscsnes.h"   
PetscErrorCode SNESNewtonTRDCSetPreCheck(SNES snes, PetscErrorCode (*func)(SNES, Vec, Vec, PetscBool *, void *), void *ctx)

Logically Collective

Input Parameters#

  • snes - the nonlinear solver object

  • func - [optional] function evaluation routine, for the calling sequence see SNESNewtonTRDCPreCheck()

  • 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 SNESNEWTONTRDC solver.

See Also#

SNESNEWTONTRDC, SNESNewtonTRDCPreCheck(), SNESNewtonTRDCGetPreCheck(), SNESNewtonTRDCSetPostCheck(), SNESNewtonTRDCGetPostCheck(), SNESNewtonTRDCGetRhoFlag()

Level#

intermediate

Location#

src/snes/impls/ntrdc/ntrdc.c

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