Method BuildRepresentation

Interaction/Widgets/vtk3DCursorRepresentation.cxx:227–260

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//------------------------------------------------------------------------------
void vtk3DCursorRepresentation::BuildRepresentation()
{
  this->Internals->UpdateCursor();

  // Target size = HandleSize in world coordinates
  double cursorPos[3] = { 0.0 };
  this->Internals->Cursor->GetPosition(cursorPos);
  double targetSize = this->SizeHandlesInPixels(1.0, cursorPos);

  double cursorBounds[6] = { 0.0 };
  this->Internals->Cursor->GetBounds(cursorBounds);

  // Safety check
  if (cursorBounds[1] - cursorBounds[0] == 0)
  {
    return;
  }

  const double sizeRatio = 2 * targetSize / (cursorBounds[1] - cursorBounds[0]);

  // Hardware Picker can return NaN position when the ray cast picking do not find any
  // intersection due to floating-point arithmetic imprecisions (for example, when hitting
  // the border of a cell)
  if (std::isnan(sizeRatio))
  {
    return;
  }

  // Rescale the actor to fit the target size
  double scale[3] = { 0.0 };
  this->Internals->Cursor->GetScale(scale);
  vtkMath::MultiplyScalar(scale, sizeRatio);
  this->Internals->Cursor->SetScale(scale);
}

//------------------------------------------------------------------------------
void vtk3DCursorRepresentation::ReleaseGraphicsResources(vtkWindow* win)