1c4762a1bSJed Brown static char help[] = "Tests 1D cell-based discretization tools.\n\n"; 2c4762a1bSJed Brown 3c4762a1bSJed Brown #include <petscdt.h> 4c4762a1bSJed Brown #include <petscviewer.h> 5c4762a1bSJed Brown 6c4762a1bSJed Brown int main(int argc,char **argv) 7c4762a1bSJed Brown { 8c4762a1bSJed Brown PetscInt i,j,degrees[1000],ndegrees,nsrc_points,ntarget_points; 9c4762a1bSJed Brown PetscReal src_points[1000],target_points[1000],*R; 10c4762a1bSJed Brown PetscBool flg; 11c4762a1bSJed Brown 12*327415f7SBarry Smith PetscFunctionBeginUser; 139566063dSJacob Faibussowitsch PetscCall(PetscInitialize(&argc,&argv,(char*)0,help)); 14d0609cedSBarry Smith PetscOptionsBegin(PETSC_COMM_WORLD,NULL,"Discretization tools test options",NULL); 15c4762a1bSJed Brown { 16c4762a1bSJed Brown ndegrees = 1000; 17c4762a1bSJed Brown degrees[0] = 1; 18c4762a1bSJed Brown degrees[1] = 2; 19c4762a1bSJed Brown degrees[2] = 3; 209566063dSJacob Faibussowitsch PetscCall(PetscOptionsIntArray("-degrees","list of max degrees to evaluate","",degrees,&ndegrees,&flg)); 21c4762a1bSJed Brown if (!flg) ndegrees = 3; 22c4762a1bSJed Brown 23c4762a1bSJed Brown nsrc_points = 1000; 24c4762a1bSJed Brown src_points[0] = -1.; 25c4762a1bSJed Brown src_points[1] = 0.; 26c4762a1bSJed Brown src_points[2] = 1.; 279566063dSJacob Faibussowitsch PetscCall(PetscOptionsRealArray("-src_points","list of points defining intervals on which to integrate","",src_points,&nsrc_points,&flg)); 28c4762a1bSJed Brown if (!flg) nsrc_points = 3; 29c4762a1bSJed Brown 30c4762a1bSJed Brown ntarget_points = 1000; 31c4762a1bSJed Brown target_points[0] = -1.; 32c4762a1bSJed Brown target_points[1] = 0.; 33c4762a1bSJed Brown target_points[2] = 1.; 349566063dSJacob Faibussowitsch PetscCall(PetscOptionsRealArray("-target_points","list of points defining intervals on which to integrate","",target_points,&ntarget_points,&flg)); 35c4762a1bSJed Brown if (!flg) ntarget_points = 3; 36c4762a1bSJed Brown } 37d0609cedSBarry Smith PetscOptionsEnd(); 38c4762a1bSJed Brown 399566063dSJacob Faibussowitsch PetscCall(PetscMalloc1((nsrc_points-1)*(ntarget_points-1),&R)); 40c4762a1bSJed Brown for (i=0; i<ndegrees; i++) { 419566063dSJacob Faibussowitsch PetscCall(PetscDTReconstructPoly(degrees[i],nsrc_points-1,src_points,ntarget_points-1,target_points,R)); 42c4762a1bSJed Brown for (j=0; j<(ntarget_points-1)*(nsrc_points-1); j++) { /* Truncate to zero for nicer output */ 43c4762a1bSJed Brown if (PetscAbs(R[j]) < 10*PETSC_MACHINE_EPSILON) R[j] = 0; 44c4762a1bSJed Brown } 45c4762a1bSJed Brown for (j=0; j<ntarget_points-1; j++) { 4663a3b9bcSJacob Faibussowitsch PetscCall(PetscPrintf(PETSC_COMM_WORLD,"Degree %" PetscInt_FMT " target interval (%g,%g)\n",degrees[i],(double)target_points[j],(double)target_points[j+1])); 479566063dSJacob Faibussowitsch PetscCall(PetscRealView(nsrc_points-1,R+j*(nsrc_points-1),PETSC_VIEWER_STDOUT_WORLD)); 48c4762a1bSJed Brown } 49c4762a1bSJed Brown } 509566063dSJacob Faibussowitsch PetscCall(PetscFree(R)); 519566063dSJacob Faibussowitsch PetscCall(PetscFinalize()); 52b122ec5aSJacob Faibussowitsch return 0; 53c4762a1bSJed Brown } 54c4762a1bSJed Brown 55c4762a1bSJed Brown /*TEST 56c4762a1bSJed Brown test: 57c4762a1bSJed Brown suffix: 1 58c4762a1bSJed Brown args: -degrees 1,2,3 -target_points -0.3,0,.2 -src_points -1,-.3,0,.2,1 59c4762a1bSJed Brown TEST*/ 60