Method InsertHandleOnLine

Interaction/Widgets/vtkCameraPathRepresentation.cxx:352–384

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//------------------------------------------------------------------------------
int vtkCameraPathRepresentation::InsertHandleOnLine(double* pos)
{
  if (this->NumberOfHandles < 2 || pos == nullptr)
  {
    return -1;
  }

  vtkIdType id = this->LinePicker->GetCellId();
  if (id == -1)
  {
    return -1;
  }

  vtkIdType subid = this->LinePicker->GetSubId();

  int istart = vtkMath::Floor(
    subid * (this->NumberOfHandles + this->Closed - 1.0) / static_cast<double>(this->Resolution));

  istart++;

  // insert new camera
  vtkNew<vtkCamera> cam;
  cam->SetPosition(pos);

  // calculate the new focal point
  vtkVector3d focusPoint1(this->CameraHandles[istart - 1]->GetDirection());
  vtkVector3d focusPoint2(this->CameraHandles[istart % this->NumberOfHandles]->GetDirection());
  focusPoint1 = (focusPoint1 + focusPoint2) / vtkVector3d(2.0);
  cam->SetFocalPoint(focusPoint1.GetData());

  this->AddCameraAt(cam, istart);
  return istart;
}

//------------------------------------------------------------------------------
void vtkCameraPathRepresentation::EraseHandle(const int& index)