Date: 2021-02-01T14:41:53+00:00

Actual source code: test2.c
slepc-3.14.2 2021-02-01
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      1: /*
      2:    - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
      3:    SLEPc - Scalable Library for Eigenvalue Problem Computations
      4:    Copyright (c) 2002-2020, Universitat Politecnica de Valencia, Spain

      6:    This file is part of SLEPc.
      7:    SLEPc is distributed under a 2-clause BSD license (see LICENSE).
      8:    - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
      9: */

     11: static char help[] = "Test the ring region.\n\n";

     13: #include <slepcrg.h>

     15: #define NPOINTS 11

     17: PetscErrorCode CheckPoint(RG rg,PetscReal re,PetscReal im)
     18: {
     20:   PetscInt       inside;
     21:   PetscScalar    ar,ai;

     24: #if defined(PETSC_USE_COMPLEX)
     25:   ar = PetscCMPLX(re,im);
     26: #else
     27:   ar = re; ai = im;
     28: #endif
     29:   RGCheckInside(rg,1,&ar,&ai,&inside);
     30:   PetscPrintf(PETSC_COMM_WORLD,"Point (%g,%g) is %s the region\n",(double)re,(double)im,(inside>=0)?"inside":"outside");
     31:   return(0);
     32: }

     34: int main(int argc,char **argv)
     35: {
     37:   RG             rg;
     38:   RGType         rtype;
     39:   PetscInt       i;
     40:   PetscBool      triv;
     41:   PetscReal      re,im,radius,vscale,start_ang,end_ang,width;
     42:   PetscScalar    center,cr[NPOINTS],ci[NPOINTS];

     44:   SlepcInitialize(&argc,&argv,(char*)0,help);if (ierr) return ierr;
     45:   RGCreate(PETSC_COMM_WORLD,&rg);

     47:   RGSetType(rg,RGRING);
     48:   RGIsTrivial(rg,&triv);
     49:   if (!triv) SETERRQ(PETSC_COMM_WORLD,1,"Region should be trivial before setting parameters");
     50:   RGRingSetParameters(rg,2,PETSC_DEFAULT,0.5,0.25,0.75,0.1);
     51:   RGSetFromOptions(rg);
     52:   RGIsTrivial(rg,&triv);
     53:   if (triv) SETERRQ(PETSC_COMM_WORLD,1,"Region should be non-trivial after setting parameters");
     54:   RGView(rg,NULL);
     55:   RGViewFromOptions(rg,NULL,"-rg_view");

     57:   RGGetType(rg,&rtype);
     58:   RGRingGetParameters(rg,&center,&radius,&vscale,&start_ang,&end_ang,&width);
     59:   PetscPrintf(PETSC_COMM_WORLD,"%s region: \n  center=%g, radius=%g, vscale=%g\n  start angle=%g, end angle=%g, width=%g\n\n",rtype,(double)PetscRealPart(center),(double)radius,(double)vscale,(double)start_ang,(double)end_ang,(double)width);

     61:   CheckPoint(rg,3.0,0.3);
     62:   CheckPoint(rg,1.1747,0.28253);

     64:   PetscPrintf(PETSC_COMM_WORLD,"\nContour points: ");
     65:   RGComputeContour(rg,NPOINTS,cr,ci);
     66:   for (i=0;i<NPOINTS;i++) {
     67: #if defined(PETSC_USE_COMPLEX)
     68:     re = PetscRealPart(cr[i]);
     69:     im = PetscImaginaryPart(cr[i]);
     70: #else
     71:     re = cr[i];
     72:     im = ci[i];
     73: #endif
     74:     PetscPrintf(PETSC_COMM_WORLD,"(%.3g,%.3g) ",(double)re,(double)im);
     75:   }
     76:   PetscPrintf(PETSC_COMM_WORLD,"\n");

     78:   RGDestroy(&rg);
     79:   SlepcFinalize();
     80:   return ierr;
     81: }

     83: /*TEST

     85:    test:
     86:       suffix: 1
     87:       args: -rg_ring_width 0.015

     89:    test:
     90:       suffix: 2
     91:       args: -rg_ring_width 0.015 -rg_scale 1.5

     93:    test:
     94:       suffix: 3
     95:       args: -rg_view draw:tikz:test2_3_ring.tikz
     96:       filter: cat - test2_3_ring.tikz
     97:       requires: !single

     99: TEST*/