DMProjectFunction#

This projects the given function into the function space provided by a DM, putting the coefficients in a global vector.

Synopsis#

#include "petscdm.h"          
#include "petscdmlabel.h"     
#include "petscds.h"     
PetscErrorCode DMProjectFunction(DM dm, PetscReal time, PetscErrorCode (**funcs)(PetscInt, PetscReal, const PetscReal[], PetscInt, PetscScalar *, void *), void **ctxs, InsertMode mode, Vec X)

Collective

Input Parameters#

  • dm - The DM

  • time - The time

  • funcs - The coordinate functions to evaluate, one per field

  • ctxs - Optional array of contexts to pass to each coordinate function. ctxs itself may be null.

  • mode - The insertion mode for values

Output Parameter#

  • X - vector

Calling sequence of funcs#

PetscErrorCode funcs(PetscInt dim, PetscReal time, const PetscReal x[], PetscInt Nc, PetscScalar u[], void *ctx);

  • dim - The spatial dimension

  • time - The time at which to sample

  • x - The coordinates

  • Nc - The number of components

  • u - The output field values

  • ctx - optional user-defined function context

Developer Notes#

This API is specific to only particular usage of DM

The notes need to provide some information about what has to be provided to the DM to be able to perform the computation.

See Also#

DM Basics, DM, DMProjectFunctionLocal(), DMProjectFunctionLabel(), DMComputeL2Diff()

Level#

developer

Location#

src/dm/interface/dm.c

Examples#

src/dm/dt/dualspace/impls/lagrange/tutorials/ex2.c
src/snes/tutorials/ex12.c
src/snes/tutorials/ex62.c
src/snes/tutorials/ex63.c
src/snes/tutorials/ex69.c
src/snes/tutorials/ex71.c
src/snes/tutorials/ex75.c
src/snes/tutorials/ex76.c
src/snes/tutorials/ex77.c
src/tao/tutorials/ex1.c
src/tao/tutorials/ex2.c

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Index of all DM routines
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