Method RequestData

Filters/Modeling/vtkCollisionDetectionFilter.cxx:406–581

Description: Perform a collision detection

// Description:
// Perform a collision detection
int vtkCollisionDetectionFilter::RequestData(vtkInformation* vtkNotUsed(request),
  vtkInformationVector** inputVector, vtkInformationVector* outputVector)
{
  // get the info objects
  vtkDebugMacro(<< "Beginning execution...");

  // inputs and outputs
  vtkPolyData* input[2];
  vtkPolyData* output[3];

  // copy inputs to outputs
  vtkInformation *inInfo, *outInfo;
  for (int i = 0; i < 2; i++)
  {
    inInfo = inputVector[i]->GetInformationObject(0);
    input[i] = vtkPolyData::SafeDownCast(inInfo->Get(vtkDataObject::DATA_OBJECT()));

    outInfo = outputVector->GetInformationObject(i);
    output[i] = vtkPolyData::SafeDownCast(outInfo->Get(vtkDataObject::DATA_OBJECT()));

    output[i]->CopyStructure(input[i]);
    output[i]->GetPointData()->PassData(input[i]->GetPointData());
    output[i]->GetCellData()->PassData(input[i]->GetCellData());
    output[i]->GetFieldData()->PassData(input[i]->GetFieldData());
  }

  // set up the contacts polydata output on port index 2
  outInfo = outputVector->GetInformationObject(2);
  output[2] = vtkPolyData::SafeDownCast(outInfo->Get(vtkDataObject::DATA_OBJECT()));
  vtkPoints* contactsPoints = vtkPoints::New();
  output[2]->SetPoints(contactsPoints);
  contactsPoints->Delete();

  if (this->CollisionMode == vtkCollisionDetectionFilter::VTK_ALL_CONTACTS)
  { // then create a lines cell array
    vtkCellArray* lines = vtkCellArray::New();
    output[2]->SetLines(lines);
    lines->Delete();
  }
  else
  { // else create a verts cell array
    vtkCellArray* verts = vtkCellArray::New();
    output[2]->SetVerts(verts);
    verts->Delete();
  }

  // Allocate arrays for the contact cells lists
  vtkSmartPointer<vtkIdTypeArray> contactcells0 = vtkSmartPointer<vtkIdTypeArray>::New();
  if (contactcells0)
  {
    contactcells0->SetName("ContactCells");
  }
  output[0]->GetFieldData()->AddArray(contactcells0);

  vtkSmartPointer<vtkIdTypeArray> contactcells1 = vtkSmartPointer<vtkIdTypeArray>::New();
  if (contactcells1)
  {
    contactcells1->SetName("ContactCells");