Method Prop3DTransform

Interaction/Style/vtkInteractorStyleTrackballActor.cxx:520–571

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void vtkInteractorStyleTrackballActor::Prop3DTransform(
  vtkProp3D* prop3D, double* boxCenter, int numRotation, double** rotate, double* scale)
{
  vtkMatrix4x4* oldMatrix = vtkMatrix4x4::New();
  prop3D->GetMatrix(oldMatrix);

  double orig[3];
  prop3D->GetOrigin(orig);

  vtkTransform* newTransform = vtkTransform::New();
  newTransform->PostMultiply();
  if (prop3D->GetUserMatrix() != nullptr)
  {
    newTransform->SetMatrix(prop3D->GetUserMatrix());
  }
  else
  {
    newTransform->SetMatrix(oldMatrix);
  }

  newTransform->Translate(-(boxCenter[0]), -(boxCenter[1]), -(boxCenter[2]));

  for (int i = 0; i < numRotation; i++)
  {
    newTransform->RotateWXYZ(rotate[i][0], rotate[i][1], rotate[i][2], rotate[i][3]);
  }

  if ((scale[0] * scale[1] * scale[2]) != 0.0)
  {
    newTransform->Scale(scale[0], scale[1], scale[2]);
  }

  newTransform->Translate(boxCenter[0], boxCenter[1], boxCenter[2]);

  // now try to get the composite of translate, rotate, and scale
  newTransform->Translate(-(orig[0]), -(orig[1]), -(orig[2]));
  newTransform->PreMultiply();
  newTransform->Translate(orig[0], orig[1], orig[2]);

  if (prop3D->GetUserMatrix() != nullptr)
  {
    newTransform->GetMatrix(prop3D->GetUserMatrix());
  }
  else
  {
    prop3D->SetPosition(newTransform->GetPosition());
    prop3D->SetScale(newTransform->GetScale());
    prop3D->SetOrientation(newTransform->GetOrientation());
  }
  oldMatrix->Delete();
  newTransform->Delete();
}
VTK_ABI_NAMESPACE_END