Method BuildLabel

Rendering/Core/vtkLabeledContourMapper.cxx:1379–1419

------------------------------------------------------------------------------

//------------------------------------------------------------------------------
bool vtkLabeledContourMapper::Private::BuildLabel(
  vtkTextActor3D* actor, const LabelMetric& metric, const LabelInfo& info)

{
  assert(metric.Valid);
  actor->SetInput(metric.Text.c_str());
  actor->SetTextProperty(metric.TProp);
  actor->SetPosition(const_cast<double*>(info.Position.GetData()));

  vtkNew<vtkTransform> xform;
  xform->PostMultiply();

  xform->Translate((-info.Position).GetData());

  xform->Scale(info.ScaleDisplayToActor, info.ScaleDisplayToActor, info.ScaleDisplayToActor);

  vtkVector3d forward = info.UpA.Cross(info.RightA);
  double rot[16];
  rot[4 * 0 + 0] = info.RightA[0];
  rot[4 * 1 + 0] = info.RightA[1];
  rot[4 * 2 + 0] = info.RightA[2];
  rot[4 * 3 + 0] = 0;
  rot[4 * 0 + 1] = info.UpA[0];
  rot[4 * 1 + 1] = info.UpA[1];
  rot[4 * 2 + 1] = info.UpA[2];
  rot[4 * 3 + 1] = 0;
  rot[4 * 0 + 2] = forward[0];
  rot[4 * 1 + 2] = forward[1];
  rot[4 * 2 + 2] = forward[2];
  rot[4 * 3 + 2] = 0;
  rot[4 * 0 + 3] = 0;
  rot[4 * 1 + 3] = 0;
  rot[4 * 2 + 3] = 0;
  rot[4 * 3 + 3] = 1;
  xform->Concatenate(rot);

  xform->Translate(info.Position.GetData());
  actor->SetUserTransform(xform);

  return true;
}

//------------------------------------------------------------------------------
void vtkLabeledContourMapper::Private::ComputeLabelInfo(LabelInfo& info, const LabelMetric& metrics)