send_lots_of_points_node.cpp

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/*
 * Copyright (c) 2011, Willow Garage, Inc.
 * 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 Willow Garage, Inc. 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 OWNER 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.
 */
 
#include "ros/ros.h"
#include "sensor_msgs/PointCloud.h"
#include "math.h"
 
int main(int argc, char** argv)
{
  ros::init(argc, argv, "send_lots_of_points");
 
  int rate = 1;
  bool moving = true;
  int size = 100;
 
  if (argc > 1)
  {
    rate = atoi(argv[1]);
  }
  if (argc > 2)
  {
    moving = bool(atoi(argv[2]));
  }
  if (argc > 3)
  {
    size = atoi(argv[3]);
  }
 
  ros::NodeHandle nh;
 
  ros::Publisher pub = nh.advertise<sensor_msgs::PointCloud>("lots_of_points", 100);
  ros::Rate loop_rate(rate);
 
  sensor_msgs::PointCloud msg;
  int width = size;
  int length = 2 * size;
  msg.points.resize(width * length);
  msg.header.frame_id = "base_link";
 
  int count = 0;
  while (ros::ok())
  {
    width++;
    msg.points.resize(width * length + (count % 2));
 
    for (int x = 0; x < width; x++)
    {
      for (int y = 0; y < length; y++)
      {
        geometry_msgs::Point32& point = msg.points[x + y * width];
        point.x = float(x / 100.0);
        point.y = float(y / 100.0);
        //        point.z = sinf( x / 100.0 + y / 100.0 + count / 100.0 );
        point.z = ((x + y + count) % 100) / 100.0;
      }
    }
    if (count % 2)
    {
      msg.points[width * length + 1].x = -.1;
      msg.points[width * length + 1].y = -.1;
      msg.points[width * length + 1].z = 1.1;
    }
    msg.header.seq = count;
    msg.header.stamp = ros::Time::now();
 
    printf("publishing at %d hz, %s, %d x %d points.\n", rate, (moving ? "moving" : "static"), width,
           length);
 
    pub.publish(msg);
 
    ros::spinOnce();
    loop_rate.sleep();
    if (moving)
    {
      ++count;
    }
  }
}