[Paraview] AMR reader

[Randy Hudson]

I've speeded up my amr reader by turning inside out the loop that reads the scalar variables from the dataset and loads them into the vtkHierarchicalDataSet.  

Below is the current piece of RequestData() that does that work.  I measured the time spent in the five code blocks indicated, and by far the most time is spent in BLOCK FIVE, ds->GenerateVisibilityArrays().

Does that sound right?


Thanks.

   vtkDataObject* doOutput = info->Get(vtkCompositeDataSet::COMPOSITE_DATA_SET());
   vtkHierarchicalBoxDataSet* ds = vtkHierarchicalBoxDataSet::SafeDownCast(doOutput);

   int runsize = this->fvo_hb - this->fvo_lb + 1;
   int* levelPerBlockId = new int[runsize];

   { // BLOCK ONE ----------------------------------------
   for(int i=0; i<this->numLevels; i++) {
      for(int j=0; j<this->numBlocksPerLevel[i]; j++) {
         if ((this->fvo_lb <= this->blockIdsPerLevel[i][j]) && (this->blockIdsPerLevel[i][j] <= this->fvo_hb)) {
            levelPerBlockId[this->blockIdsPerLevel[i][j] - this->fvo_lb] = i;
         }
      }
   }
   } //  -------------------------------------------------

   vtkDoubleArray*** scalars;   //   vtkDataArray*[k][runsize]

   //   TRY ALLOCATING THE MIDDLE DIMENSION HERE, RATHER THAN IN flashVtkComponents
   scalars = new vtkDoubleArray**[count];

   { // BLOCK TWO ----------------------------------------
   for (int k=0; k<count; k++) {   //   FOR ALL SELECTED SCALAR VARIABLES
      scalars[k] = new vtkDoubleArray*[runsize];
      //   GET ARRAYS FOR ALL BLOCKS IN THIS PROCESS' RANGE
      this->AddBlockrunScalars(this->fvo_lb, this->fvo_hb, indices_of_selected[k], scalars[k]);
   }
   } //  -------------------------------------------------

   { // BLOCK THREE ----------------------------------------
   for (int i=this->fvo_lb; i<=this->fvo_hb; i++) {
      vtkUniformGrid* ug = vtkUniformGrid::New();
      this->fvo->DefineUG(levelPerBlockId[i - this->fvo_lb], i, ug);   //   LEVEL IDX, BLK ID & GRID

      for (int k=0; k<count; k++) {   //   FOR ALL SELECTED SCALAR VARIABLES
         scalars[k][i - this->fvo_lb]->SetName(this->varNames[indices_of_selected[k]]);
         if (this->fvo->GetDataLocation() == LocPoint) {
            ug->GetPointData()->AddArray((vtkDataArray*)(scalars[k][i - this->fvo_lb]));
         } else if (this->fvo->GetDataLocation() == LocCell) {
            ug->GetCellData()->AddArray((vtkDataArray*)(scalars[k][i - this->fvo_lb]));
         }
         scalars[k][i - this->fvo_lb]->Delete();
      }

      ds->SetDataSet(levelPerBlockId[i - this->fvo_lb], i - this->fvo_lb, ug);
      ug->Delete();
   }
   } //  -------------------------------------------------

   for (int k=0; k<count; k++) {   //   FOR ALL SELECTED SCALAR VARIABLES
      delete [] scalars[k];
   }
   delete [] scalars;
#endif

   { // BLOCK FOUR ----------------------------------------
   for(int i=0; i<this->numLevels; i++) {
      ds->SetRefinementRatio(i, 2);
   }
   } //  -------------------------------------------------

   { // BLOCK FIVE ----------------------------------------
   ds->GenerateVisibilityArrays();
   } //  -------------------------------------------------






Randy.
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