C++ PatchData::get_vertex_index方法代码示例

bool EdgeLengthQualityMetric::evaluate_vertex(PatchData &pd, MsqVertex* vert,
                                             double &fval, MsqError &err)
{
  fval=0.0;
  size_t this_vert = pd.get_vertex_index(vert);
  size_t other_vert;
  vector<size_t> adj_verts;
  Vector3D edg;
  pd.get_adjacent_vertex_indices(this_vert,adj_verts,err);  MSQ_ERRZERO(err);
  int num_sample_points=adj_verts.size();
  double *metric_values=new double[num_sample_points];
  MsqVertex* verts = pd.get_vertex_array(err);  MSQ_ERRZERO(err);
  int point_counter=0;
  while(!adj_verts.empty()){
    other_vert=adj_verts.back();
    adj_verts.pop_back();
    edg[0]=verts[this_vert][0]-verts[other_vert][0];
    edg[1]=verts[this_vert][1]-verts[other_vert][1];
    edg[2]=verts[this_vert][2]-verts[other_vert][2];    
    metric_values[point_counter]=edg.length();
    ++point_counter;
  }
  fval=average_metrics(metric_values,num_sample_points,err);  MSQ_ERRZERO(err);
  delete[] metric_values;
  
  return true;
  
}

/* virtual function reimplemented from QualityMetric. No doxygen doc needed. */
bool LPtoPTemplate::compute_analytical_gradient(PatchData &pd,
                                              Vector3D *const &grad,
                                              double &OF_val,
                                              MsqError &err, size_t array_size)
{
  MSQ_FUNCTION_TIMER( "LPtoPTemplate::compute_analytical_gradient" );
  
    //initialize the scaling value
  double scaling_value=1.0;
 
  size_t num_elements=pd.num_elements();
  size_t num_vertices=pd.num_vertices();
  if( num_vertices!=array_size && array_size>0)
  {
    MSQ_SETERR(err)("Incorrect array size.", MsqError::INVALID_ARG);
    return false;
  }
  
  MsqMeshEntity* elems=pd.get_element_array(err); MSQ_ERRZERO(err);
  MsqVertex* vertices=pd.get_vertex_array(err); MSQ_ERRZERO(err);
  bool qm_bool=true;
  double QM_val;
  OF_val = 0.;
  size_t i;
  int p1;
  
  //Set currentQM to be quality metric (possibly composite) associated with the objective function
  QualityMetric* currentQM = get_quality_metric();
  if(currentQM==NULL) {
    MSQ_SETERR(err)("LPtoPTemplate has NULL QualityMetric pointer.",MsqError::INVALID_STATE);
    return false;
  }
  enum QualityMetric::MetricType qm_type=currentQM->get_metric_type();
  
  if (qm_type!=QualityMetric::ELEMENT_BASED &&
      qm_type!=QualityMetric::VERTEX_BASED) {
    MSQ_SETERR(err)("Make sure MetricType is initialised"
                    "in concrete QualityMetric constructor.",
                    MsqError::INVALID_STATE);
    return false;
  }


  // zeros out objective function gradient
  for (i=0; i<num_vertices; ++i)
    grad[i] =0;
  
  // Computes objective function gradient for an element based metric
  if(qm_type==QualityMetric::ELEMENT_BASED){
      //if scaling, divid by num_elements
    if(dividingByN){
      if(num_elements<=0) {
        MSQ_SETERR(err)("The number of elements should not be zero.",MsqError::INVALID_MESH);
        return false;
      }
      
      scaling_value/=num_elements;
    }
    size_t e, ve;
    size_t nfve; // num free vtx in element
    size_t nve; // num vtx in element
    MsqVertex* ele_free_vtces[MSQ_MAX_NUM_VERT_PER_ENT];
    const size_t *ele_vtces_ind;

    // loops over all elements.
    for (e=0; e<num_elements; ++e) {
      // stores the pointers to the free vertices within the element
      // (using pointer arithmetic).
      nfve = 0;
      nve = elems[e].vertex_count();
      ele_vtces_ind = elems[e].get_vertex_index_array();
      for (ve=0; ve<nve; ++ve) {
        if (vertices[ele_vtces_ind[ve]].is_free_vertex()) {
          ele_free_vtces[nfve] = vertices + ele_vtces_ind[ve];
          ++nfve;
        }
      }

      // Computes q and grad(q)
      Vector3D grad_vec[MSQ_MAX_NUM_VERT_PER_ENT];
      qm_bool = currentQM->compute_element_gradient(
                                     pd, &elems[e],
                                     ele_free_vtces,
                                     grad_vec, nfve, QM_val, err);
      if(MSQ_CHKERR(err) || !qm_bool) return false;

      // computes p*|Q(e)|^{p-1}
      QM_val = fabs(QM_val);
      double QM_pow=1.0;
      double factor;
      if (pVal==1) factor=1;
      else {
        QM_pow=QM_val;
        for (p1=1; p1<pVal-1; ++p1)
          QM_pow*=QM_val;
        factor = QM_pow * pVal;
      }
        //this scales the gradient
      factor *= (scaling_value * get_negate_flag());
//.........这里部分代码省略.........