text: // ----------------------------------------------------------------------------
  // -                        Open3D: www.open3d.org                            -
  // ----------------------------------------------------------------------------
  // The MIT License (MIT)
  //
  // Copyright (c) 2018-2021 www.open3d.org
  //
  // Permission is hereby granted, free of charge, to any person obtaining a copy
  // of this software and associated documentation files (the "Software"), to deal
  // in the Software without restriction, including without limitation the rights
  // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  // copies of the Software, and to permit persons to whom the Software is
  // furnished to do so, subject to the following conditions:
  //
  // The above copyright notice and this permission notice shall be included in
  // all copies or substantial portions of the Software.
  //
  // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  // FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
  // IN THE SOFTWARE.
  // ----------------------------------------------------------------------------
  
  #include "open3d/visualization/gui/Label3D.h"
  
  #include <string>
  
  namespace open3d {
  namespace visualization {
  namespace gui {
  
  static const Color DEFAULT_COLOR(0, 0, 0, 1);
  
  struct Label3D::Impl {
      std::string text_;
      Eigen::Vector3f position_;
      Color color_ = DEFAULT_COLOR;
  };
  
  Label3D::Label3D(const Eigen::Vector3f& pos, const char* text /*= nullptr*/)
      : impl_(new Label3D::Impl()) {
      SetPosition(pos);
      if (text) {
          SetText(text);
      }
  }
  
  Label3D::~Label3D() {}
  
  const char* Label3D::GetText() const { return impl_->text_.c_str(); }
  
  void Label3D::SetText(const char* text) { impl_->text_ = text; }
  
  Eigen::Vector3f Label3D::GetPosition() const { return impl_->position_; }
  
  void Label3D::SetPosition(const Eigen::Vector3f& pos) {
      impl_->position_ = pos;
  }
  
  Color Label3D::GetTextColor() const { return impl_->color_; }
  
  void Label3D::SetTextColor(const Color& color) { impl_->color_ = color; }
  
  }  // namespace gui
  }  // namespace visualization
  }  // namespace open3d
  