petsc-3.14.6 2021-03-30

DMDATSSetIJacobianLocal

set a local residual evaluation function

#include "petscdmda.h" 
#include "petscts.h" 
PetscErrorCode DMDATSSetIJacobianLocal(DM dm,DMDATSIJacobianLocal func,void *ctx)

Logically Collective

	dm	- DM to associate callback with
	func	- local residual evaluation
	ctx	- optional context for local residual evaluation

func(DMDALocalInfo* info,PetscReal t,void* x,void *xdot,PetscScalar shift,Mat J,Mat B,void *ctx);

	info	- DMDALocalInfo defining the subdomain to evaluate the residual on
	t	- time at which to evaluate the jacobian
	x	- array of local state information
	xdot	- time derivative at this state
	shift	- see TSSetIJacobian() for the meaning of this parameter
	J	- Jacobian matrix
	B	- preconditioner matrix; often same as J
	ctx	- optional context passed above

beginner