1: /*
  2:    - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
  3:    SLEPc - Scalable Library for Eigenvalue Problem Computations
  4:    Copyright (c) 2002-, 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: {
 19:   PetscInt       inside;
 20:   PetscScalar    ar,ai;

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

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

 42:   PetscFunctionBeginUser;
 43:   PetscCall(SlepcInitialize(&argc,&argv,(char*)0,help));
 44:   PetscCall(RGCreate(PETSC_COMM_WORLD,&rg));

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

 56:   PetscCall(RGGetType(rg,&rtype));
 57:   PetscCall(RGRingGetParameters(rg,&center,&radius,&vscale,&start_ang,&end_ang,&width));
 58:   PetscCall(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));

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

 63:   PetscCall(RGComputeBoundingBox(rg,&a,&b,&c,&d));
 64:   PetscCall(PetscPrintf(PETSC_COMM_WORLD,"The bounding box is [%g,%g]x[%g,%g]\n",(double)a,(double)b,(double)c,(double)d));

 66:   PetscCall(PetscPrintf(PETSC_COMM_WORLD,"Contour points: "));
 67:   PetscCall(RGComputeContour(rg,NPOINTS,cr,ci));
 68:   for (i=0;i<NPOINTS;i++) {
 69: #if defined(PETSC_USE_COMPLEX)
 70:     re = PetscRealPart(cr[i]);
 71:     im = PetscImaginaryPart(cr[i]);
 72: #else
 73:     re = cr[i];
 74:     im = ci[i];
 75: #endif
 76:     PetscCall(PetscPrintf(PETSC_COMM_WORLD,"(%.3g,%.3g) ",(double)re,(double)im));
 77:   }
 78:   PetscCall(PetscPrintf(PETSC_COMM_WORLD,"\n"));

 80:   PetscCall(RGDestroy(&rg));
 81:   PetscCall(SlepcFinalize());
 82:   return 0;
 83: }

 85: /*TEST

 87:    test:
 88:       suffix: 1
 89:       args: -rg_ring_width 0.015

 91:    test:
 92:       suffix: 2
 93:       args: -rg_ring_width 0.015 -rg_scale 1.5

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

101:    test:
102:       suffix: 4
103:       args: -rg_ring_width 0.015 -rg_ring_center 3 -rg_ring_radius 0.3 -rg_ring_vscale 1
104:       requires: !single

106:    test:
107:       suffix: 5
108:       args: -rg_ring_width 0.1 -rg_ring_center 0.35 -rg_ring_radius 0.86 -rg_ring_vscale 1 -rg_ring_startangle 0.75 -rg_ring_endangle 0.25

110: TEST*/