source: issm/trunk/src/c/modules/DragCoefficientAbsGradientx/DragCoefficientAbsGradientx.cpp@ 16137

/*!\file DragCoefficientAbsGradientx
 * \brief: compute misfit between observations and model
 */

#include "./DragCoefficientAbsGradientx.h"

#include "../../shared/shared.h"
#include "../../toolkits/toolkits.h"

void DragCoefficientAbsGradientx( IssmDouble* pJ, Elements* elements,Nodes* nodes, Vertices* vertices, Loads* loads, Materials* materials,Parameters* parameters,int weight_index){

        /*Intermediary*/
        int i;
        Element* element=NULL;

        /*output: */
        IssmDouble J=0;
        IssmDouble J_sum;

        /*Compute Misfit: */
        for (i=0;i<elements->Size();i++){
                element=dynamic_cast<Element*>(elements->GetObjectByOffset(i));
                J+=element->DragCoefficientAbsGradient(weight_index);
        }

        /*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;
}