Method PlaceWidgetExtended

Rendering/VR/vtkVRPanelRepresentation.cxx:444–515

}

void vtkVRPanelRepresentation::PlaceWidgetExtended(
  const double* bds, const double* normal, const double* upvec, double scale)
{
  this->TextActor->GetUserMatrix()->Identity();
  this->TextActor->SetOrientation(0, 0, 0);
  this->LastScale = scale;

  // grab the bounding box of the text
  // so we can position and scale to that
  int tbounds[4];
  this->TextActor->GetBoundingBox(tbounds);
  int maxdim = tbounds[1] - tbounds[0];
  maxdim = std::max(tbounds[3] - tbounds[2], maxdim);
  // should always be at least 50 pixels
  // for any reasonable string.
  maxdim = maxdim > 50 ? maxdim : 50.0;

  // make the normal ortho to upvec
  vtkVector3d nup(upvec);
  nup.Normalize();
  vtkVector3d nvpn(normal);
  nvpn.Normalize();
  vtkVector3d nvright = nup.Cross(nvpn);
  nvright.Normalize();
  nvpn = nvright.Cross(nup);

  double basis[16];
  basis[0] = nvright[0];
  basis[4] = nvright[1];
  basis[8] = nvright[2];
  basis[12] = 0;
  basis[1] = nup[0];
  basis[5] = nup[1];
  basis[9] = nup[2];
  basis[13] = 0;
  basis[2] = nvpn[0];
  basis[6] = nvpn[1];
  basis[10] = nvpn[2];
  basis[14] = 0;
  basis[3] = 0;
  basis[7] = 0;
  basis[11] = 0;
  basis[15] = 1;

  vtkNew<vtkTransform> basisT;
  basisT->SetMatrix(basis);
  this->TextActor->SetOrientation(basisT->GetOrientation());

  if (this->CoordinateSystem == World)
  {
    // center the planel and default size to 400cm
    this->TextActor->SetScale(0.4 * scale / maxdim, 0.4 * scale / maxdim, 0.4 * scale / maxdim);
    this->TextActor->SetPosition(
      0.5 * (bds[0] + bds[1]), 0.5 * (bds[2] + bds[3]), 0.5 * (bds[4] + bds[5]));
  }

  if (this->CoordinateSystem == LeftController || this->CoordinateSystem == RightController)
  {