2: static char help[] = "Tests imbedding DMComposites inside DMComposites.\n\n";

  4: #include <petscdmda.h>
  5: #include <petscdmcomposite.h>

  7: typedef struct {
  8:   DM load;
  9:   DM L1,L2;
 10: } Load;

 12: PetscErrorCode LoadCreate(PetscInt n1, PetscInt n2, Load *load)
 13: {

 16:   PetscNew(Load,&load);
 17:   DMDACreate1d(PETSC_COMM_SELF,DMDA_BOUNDARY_NONE,n1,1,1,NULL,&load->L1);
 18:   DMDACreate1d(PETSC_COMM_SELF,DMDA_BOUNDARY_NONE,n1,1,1,NULL,&load->L2);
 19:   DMCompositeCreate(PETSC_COMM_SELF,&load->load);
 20:   return(0);
 21: }

 23: typedef struct {
 24:   DM network;
 25:   DM n1,n2;
 26: } Network;

 28: typedef struct {
 29:   DM generator;
 30:   DM g1,g2;
 31: } Generator;

 33: typedef struct {
 34:   DM        city;
 35:   Load      load;
 36:   Network   network;
 37:   Generator generator;
 38: } City;

 40: typedef struct {
 41:   DM       state;
 42:   City     *cities;
 43:   PetscInt n;
 44: } State;

 46: typedef struct {
 47:   DM       unitedstates;
 48:   State    *states;
 49:   PetscInt n;
 50: } UnitedStates;

 54: int main(int argc,char **argv)
 55: {
 57:   UnitedStates   unitedstates;

 59:   PetscInitialize(&argc,&argv,(char*)0,help);

 61:   PetscFinalize();
 62:   return 0;
 63: }