DragCoefficientAbsGradientx.cpp

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#include "./DragCoefficientAbsGradientx.h"
 
#include "../../shared/shared.h"
#include "../../toolkits/toolkits.h"
#include "../../classes/Inputs2/DatasetInput2.h"
 
void DragCoefficientAbsGradientx( IssmDouble* pJ, Elements* elements,Nodes* nodes, Vertices* vertices, Loads* loads, Materials* materials,Parameters* parameters){
 
   /*output: */
   IssmDouble J=0.;
   IssmDouble J_sum;
 
   /*Compute Misfit: */
   for(int i=0;i<elements->Size();i++){
      Element* element=xDynamicCast<Element*>(elements->GetObjectByOffset(i));
      J+=DragCoefficientAbsGradient(element);
   }
 
   /*Sum all J from all cpus of the cluster:*/
   ISSM_MPI_Reduce (&J,&J_sum,1,ISSM_MPI_DOUBLE,ISSM_MPI_SUM,0,IssmComm::GetComm() );
   ISSM_MPI_Bcast(&J_sum,1,ISSM_MPI_DOUBLE,0,IssmComm::GetComm());
   J=J_sum;
 
   /*Assign output pointers: */
   *pJ=J;
}
 
IssmDouble DragCoefficientAbsGradient(Element* element){
 
   int         domaintype,numcomponents;
   IssmDouble  Jelem=0.;
   IssmDouble  misfit,Jdet;
   IssmDouble  dp[2],weight;
   IssmDouble* xyz_list      = NULL;
 
   /*Get basal element*/
   if(!element->IsOnBase()) return 0.;
 
   /*If on water, return 0: */
   if(!element->IsIceInElement()) return 0.;
 
   /*Get problem dimension*/
   element->FindParam(&domaintype,DomainTypeEnum);
   switch(domaintype){
      case Domain2DverticalEnum:   numcomponents   = 1; break;
      case Domain3DEnum:           numcomponents   = 2; break;
      case Domain2DhorizontalEnum: numcomponents   = 2; break;
      default: _error_("not supported yet");
   }
 
   /*Spawn basal element*/
   Element* basalelement = element->SpawnBasalElement();
 
   /* Get node coordinates*/
   basalelement->GetVerticesCoordinates(&xyz_list);
 
   /*Retrieve all inputs we will be needing: */
   DatasetInput2* weights_input=basalelement->GetDatasetInput2(InversionCostFunctionsCoefficientsEnum);   _assert_(weights_input);
   Input2* drag_input   =basalelement->GetInput2(FrictionCoefficientEnum); _assert_(drag_input);
 
   /* Start  looping on the number of gaussian points: */
   Gauss* gauss=basalelement->NewGauss(2);
   for(int ig=gauss->begin();ig<gauss->end();ig++){
 
      gauss->GaussPoint(ig);
 
      /* Get Jacobian determinant: */
      basalelement->JacobianDeterminant(&Jdet,xyz_list,gauss);
 
      /*Get all parameters at gaussian point*/
      weights_input->GetInputValue(&weight,gauss,DragCoefficientAbsGradientEnum);
      drag_input->GetInputDerivativeValue(&dp[0],xyz_list,gauss);
 
      /*Compute Tikhonov regularization J = 1/2 ((dp/dx)^2 + (dp/dy)^2) */
      Jelem+=weight*.5*dp[0]*dp[0]*Jdet*gauss->weight;
      if(numcomponents==2) Jelem+=weight*.5*dp[1]*dp[1]*Jdet*gauss->weight;
 
   }
 
   /*clean up and Return: */
   if(domaintype!=Domain2DhorizontalEnum){basalelement->DeleteMaterials(); delete basalelement;};
   xDelete<IssmDouble>(xyz_list);
   delete gauss;
   return Jelem;
}