Method SetInputData

Charts/Core/vtkPlotSurface.cxx:79–140

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//------------------------------------------------------------------------------
void vtkPlotSurface::SetInputData(vtkTable* input)
{
  this->InputTable = input;
  this->NumberOfRows = input->GetNumberOfRows();
  this->NumberOfColumns = input->GetNumberOfColumns();
  this->NumberOfVertices = (this->NumberOfRows - 1) * (this->NumberOfColumns - 1) * 6;

  // initialize data ranges to row and column indices if they are not
  // already set.
  if (this->XMinimum == 0 && this->XMaximum == 0)
  {
    this->XMaximum = this->NumberOfColumns - 1;
  }
  if (this->YMinimum == 0 && this->YMaximum == 0)
  {
    this->YMaximum = this->NumberOfRows - 1;
  }

  this->Points->SetNumberOfPoints(this->NumberOfRows * this->NumberOfColumns);
  float* data = vtkArrayDownCast<vtkFloatArray>(this->Points->GetData())->GetPointer(0);
  int pos = 0;
  float surfaceMin = VTK_FLOAT_MAX;
  float surfaceMax = VTK_FLOAT_MIN;
  for (int i = 0; i < this->NumberOfRows; ++i)
  {
    for (int j = 0; j < this->NumberOfColumns; ++j)
    {
      // X (columns)
      data[pos] = this->ColumnToX(j);
      ++pos;

      // Y (rows)
      data[pos] = this->RowToY(i);
      ++pos;

      // Z (cell value)
      float k = input->GetValue(i, j).ToFloat();
      data[pos] = k;
      ++pos;

      surfaceMin = std::min(k, surfaceMin);
      surfaceMax = std::max(k, surfaceMax);
    }
  }

  if (this->Chart)
  {
    this->Chart->RecalculateBounds();
  }
  this->ComputeDataBounds();

  // setup lookup table
  this->LookupTable->SetNumberOfTableValues(256);
  this->LookupTable->SetRange(surfaceMin, surfaceMax);
  this->LookupTable->Build();
  this->ColorComponents = 3;

  // generate the surface that is used for rendering