1: #include <../src/tao/complementarity/impls/ssls/ssls.h>

  3: /*------------------------------------------------------------*/
  4: PetscErrorCode TaoSetFromOptions_SSLS(PetscOptionItems *PetscOptionsObject,Tao tao)
  5: {
  6:   TAO_SSLS       *ssls = (TAO_SSLS *)tao->data;

  8:   PetscOptionsHead(PetscOptionsObject,"Semismooth method with a linesearch for complementarity problems");
  9:   PetscOptionsReal("-ssls_delta", "descent test fraction", "",ssls->delta, &ssls->delta, NULL);
 10:   PetscOptionsReal("-ssls_rho", "descent test power", "",ssls->rho, &ssls->rho, NULL);
 11:   TaoLineSearchSetFromOptions(tao->linesearch);
 12:   KSPSetFromOptions(tao->ksp);
 13:   PetscOptionsTail();
 14:   return 0;
 15: }

 17: /*------------------------------------------------------------*/
 18: PetscErrorCode TaoView_SSLS(Tao tao, PetscViewer pv)
 19: {
 20:   return 0;
 21: }

 23: /*------------------------------------------------------------*/
 24: PetscErrorCode Tao_SSLS_Function(TaoLineSearch ls, Vec X, PetscReal *fcn, void *ptr)
 25: {
 26:   Tao            tao = (Tao)ptr;
 27:   TAO_SSLS       *ssls = (TAO_SSLS *)tao->data;

 29:   TaoComputeConstraints(tao, X, tao->constraints);
 30:   VecFischer(X,tao->constraints,tao->XL,tao->XU,ssls->ff);
 31:   VecNorm(ssls->ff,NORM_2,&ssls->merit);
 32:   *fcn = 0.5*ssls->merit*ssls->merit;
 33:   return 0;
 34: }

 36: /*------------------------------------------------------------*/
 37: PetscErrorCode Tao_SSLS_FunctionGradient(TaoLineSearch ls, Vec X, PetscReal *fcn,  Vec G, void *ptr)
 38: {
 39:   Tao            tao = (Tao)ptr;
 40:   TAO_SSLS       *ssls = (TAO_SSLS *)tao->data;

 42:   TaoComputeConstraints(tao, X, tao->constraints);
 43:   VecFischer(X,tao->constraints,tao->XL,tao->XU,ssls->ff);
 44:   VecNorm(ssls->ff,NORM_2,&ssls->merit);
 45:   *fcn = 0.5*ssls->merit*ssls->merit;

 47:   TaoComputeJacobian(tao,tao->solution,tao->jacobian,tao->jacobian_pre);

 49:   MatDFischer(tao->jacobian, tao->solution, tao->constraints,tao->XL, tao->XU, ssls->t1, ssls->t2,ssls->da, ssls->db);
 50:   MatDiagonalScale(tao->jacobian,ssls->db,NULL);
 51:   MatDiagonalSet(tao->jacobian,ssls->da,ADD_VALUES);
 52:   MatMultTranspose(tao->jacobian,ssls->ff,G);
 53:   return 0;
 54: }