1: /*
  2:   Common tools for constructing discretizations
  3: */

  7: #include <petscsys.h>

  9: /*S
 10:   PetscQuadrature - Quadrature rule for integration.

 12:   Level: developer

 14: .seealso:  PetscQuadratureCreate(), PetscQuadratureDestroy()
 15: S*/
 16: typedef struct _p_PetscQuadrature *PetscQuadrature;

 18: PETSC_EXTERN PetscErrorCode PetscQuadratureCreate(MPI_Comm, PetscQuadrature *);
 19: PETSC_EXTERN PetscErrorCode PetscQuadratureGetData(PetscQuadrature, PetscInt*, PetscInt*, const PetscReal *[], const PetscReal *[]);
 20: PETSC_EXTERN PetscErrorCode PetscQuadratureSetData(PetscQuadrature, PetscInt, PetscInt, const PetscReal [], const PetscReal []);
 21: PETSC_EXTERN PetscErrorCode PetscQuadratureView(PetscQuadrature, PetscViewer);
 22: PETSC_EXTERN PetscErrorCode PetscQuadratureDestroy(PetscQuadrature *);

 24: typedef struct {
 25:   PetscReal *v0, *n, *J, *invJ, *detJ, *vol;
 26: } PetscCellGeometry;

 28: PETSC_EXTERN PetscErrorCode PetscDTLegendreEval(PetscInt,const PetscReal*,PetscInt,const PetscInt*,PetscReal*,PetscReal*,PetscReal*);
 29: PETSC_EXTERN PetscErrorCode PetscDTGaussQuadrature(PetscInt,PetscReal,PetscReal,PetscReal*,PetscReal*);
 30: PETSC_EXTERN PetscErrorCode PetscDTReconstructPoly(PetscInt,PetscInt,const PetscReal*,PetscInt,const PetscReal*,PetscReal*);
 31: PETSC_EXTERN PetscErrorCode PetscDTGaussTensorQuadrature(PetscInt,PetscInt,PetscReal,PetscReal,PetscQuadrature*);
 32: PETSC_EXTERN PetscErrorCode PetscDTGaussJacobiQuadrature(PetscInt,PetscInt,PetscReal,PetscReal,PetscQuadrature*);

 34: #endif