STSHELL

User-defined spectral transformation via callback functions for the application of the operator to a vector and (optionally) the backtransform operation.

Usage

extern PetscErrorCode (*apply)(void*,Vec,Vec);

extern PetscErrorCode (*applytrans)(void*,Vec,Vec);

extern PetscErrorCode (*applyht)(void*,Vec,Vec);

extern PetscErrorCode (*backtr)(void*,PetscScalar*,PetscScalar*);

STCreate(comm,&st);

STSetType(st,STSHELL);

STShellSetContext(st,ctx);

STShellSetApply(st,apply);

STShellSetApplyTranspose(st,applytrans);        (optional)

STShellSetApplyHermitianTranspose(st,applyht);  (optional, only in complex scalars)

STShellSetBackTransform(st,backtr);             (optional)

Level

advanced

Location

src/sys/classes/st/impls/shell/shell.c

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