.. _program_listing_file__tmp_ws_src_snowbot_operating_system_include_snowbot_operating_system_snow_display.h:

Program Listing for File snow_display.h
=======================================

|exhale_lsh| :ref:`Return to documentation for file <file__tmp_ws_src_snowbot_operating_system_include_snowbot_operating_system_snow_display.h>` (``/tmp/ws/src/snowbot_operating_system/include/snowbot_operating_system/snow_display.h``)

.. |exhale_lsh| unicode:: U+021B0 .. UPWARDS ARROW WITH TIP LEFTWARDS

.. code-block:: cpp

   /*
    * Software License Agreement (BSD License)
    *
    *  Copyright (c) 2020, David Lu!!
    *  All rights reserved.
    *
    *  Redistribution and use in source and binary forms, with or without
    *  modification, are permitted provided that the following conditions
    *  are met:
    *
    *   * Redistributions of source code must retain the above copyright
    *     notice, this list of conditions and the following disclaimer.
    *   * Redistributions in binary form must reproduce the above
    *     copyright notice, this list of conditions and the following
    *     disclaimer in the documentation and/or other materials provided
    *     with the distribution.
    *   * Neither the name of the copyright holder nor the names of its
    *     contributors may be used to endorse or promote products derived
    *     from this software without specific prior written permission.
    *
    *  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
    *  "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
    *  LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
    *  FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
    *  COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
    *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
    *  BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
    *  LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
    *  CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
    *  LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
    *  ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
    *  POSSIBILITY OF SUCH DAMAGE.
    */
   
   #ifndef SNOWBOT_OPERATING_SYSTEM_WINTER_DISPLAY_H
   #define SNOWBOT_OPERATING_SYSTEM_WINTER_DISPLAY_H
   
   #include <rviz_common/display.hpp>
   #include <rviz_rendering/objects/point_cloud.hpp>
   #include <rviz_common/properties/int_property.hpp>
   #include <rviz_common/properties/float_property.hpp>
   #include <geometry_msgs/msg/point.hpp>
   #include <vector>
   
   namespace snowbot_operating_system
   {
   inline double randScale()
   {
     return static_cast<double>(rand()) / RAND_MAX;
   }
   
   class SnowDisplay : public rviz_common::Display
   {
     Q_OBJECT
   public:
     SnowDisplay();
   
     void update(float wall_dt, float ros_dt) override;
   
   protected:
     void onInitialize() override;
   
   private Q_SLOTS:
     void updateSize();
     void updatePosition();
   
   private:
     void letItSnow();
   
     void initializeXY(geometry_msgs::msg::Point& pt) const;
   
     rviz_rendering::PointCloud* point_cloud_;
     std::vector<rviz_rendering::PointCloud::Point> flakes_;
   
     std::vector<geometry_msgs::msg::Point> points_;
   
     rviz_common::properties::FloatProperty* width_property_;
     rviz_common::properties::FloatProperty* height_property_;
     rviz_common::properties::FloatProperty* gravity_property_;
     rviz_common::properties::FloatProperty* wind_property_;
     rviz_common::properties::FloatProperty* jiggle_property_;
     rviz_common::properties::IntProperty* size_property_;
   
     double width_, height_;
   };
   }  // namespace snowbot_operating_system
   
   #endif  // SNOWBOT_OPERATING_SYSTEM_WINTER_DISPLAY_H