pcl::visualization::PCLVisualizer添加文字显示注意事项

注意

PCLVisualizer的addText()方法不支持中文显示。

viewer.addText("不支持中文显示", 20, 60, "text");

最简单的用法，只设置文字显示的位置：

pcl::visualization::PCLVisualizer viewer("点云显示");
viewer.addText("cloud", 20, 60, "text");

复杂一点的用法，可以设置字体颜色和大小：

bool
        addText (const std::string &text,
                 int xpos, int ypos,
                 const std::string &id = "", int viewport = 0);

        /** \brief Add a text to screen
          * \param[in] text the text to add
          * \param[in] xpos the X position on screen where the text should be added
          * \param[in] ypos the Y position on screen where the text should be added
          * \param[in] r the red color value
          * \param[in] g the green color value
          * \param[in] b the blue color value
          * \param[in] id the text object id (default: equal to the "text" parameter)
          * \param[in] viewport the view port (default: all)
          */
        bool
        addText (const std::string &text, int xpos, int ypos, double r, double g, double b,
                 const std::string &id = "", int viewport = 0);

        /** \brief Add a text to screen
          * \param[in] text the text to add
          * \param[in] xpos the X position on screen where the text should be added
          * \param[in] ypos the Y position on screen where the text should be added
          * \param[in] fontsize the fontsize of the text
          * \param[in] r the red color value
          * \param[in] g the green color value
          * \param[in] b the blue color value
          * \param[in] id the text object id (default: equal to the "text" parameter)
          * \param[in] viewport the view port (default: all)
          */
        bool
        addText (const std::string &text, int xpos, int ypos, int fontsize, double r, double g, double b,
                 const std::string &id = "", int viewport = 0);

viewer.addText("cloud", 20, 60,16,255,255,255, "text");