laser_scan_display.cpp

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/*
 * Copyright (c) 2008, 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
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#include <OgreSceneNode.h>
#include <OgreSceneManager.h>
 
#include <ros/time.h>
 
#include <laser_geometry/laser_geometry.h>
 
#include <rviz/default_plugin/point_cloud_common.h>
#include <rviz/display_context.h>
#include <rviz/frame_manager.h>
#include <rviz/ogre_helpers/point_cloud.h>
#include <rviz/properties/int_property.h>
#include <rviz/validate_floats.h>
 
#include "laser_scan_display.h"
 
namespace rviz
{
LaserScanDisplay::LaserScanDisplay()
  : point_cloud_common_(new PointCloudCommon(this)), projector_(new laser_geometry::LaserProjection())
{
}
 
LaserScanDisplay::~LaserScanDisplay()
{
  LaserScanDisplay::unsubscribe();
  delete point_cloud_common_;
  delete projector_;
}
 
void LaserScanDisplay::onInitialize()
{
  // Use the threaded queue for processing of incoming messages
  update_nh_.setCallbackQueue(context_->getThreadedQueue());
 
  MFDClass::onInitialize();
  point_cloud_common_->initialize(context_, scene_node_);
}
 
void LaserScanDisplay::checkTolerance(int tolerance)
{
  if (tolerance > 1)
    setStatus(StatusProperty::Warn, "Scan Time",
              QString(
                  "Laser scan time, computed from time_increment * len(ranges), is rather large: %1s.\n"
                  "The display of any message will be delayed by this amount of time!")
                  .arg(tolerance));
}
 
void LaserScanDisplay::processMessage(const sensor_msgs::LaserScanConstPtr& scan)
{
  sensor_msgs::PointCloud2Ptr cloud(new sensor_msgs::PointCloud2);
 
  // Compute tolerance necessary for this scan
  ros::Duration tolerance(scan->time_increment * scan->ranges.size());
  if (tolerance > filter_tolerance_)
  {
    filter_tolerance_ = tolerance;
    tf_filter_->setTolerance(filter_tolerance_);
    checkTolerance(filter_tolerance_.toSec());
  }
 
  try
  {
    auto tf = context_->getTF2BufferPtr();
 
    projector_->transformLaserScanToPointCloud(fixed_frame_.toStdString(), *scan, *cloud, *tf, -1.0,
                                               laser_geometry::channel_option::Intensity);
  }
  catch (tf2::TransformException& e)
  {
    ROS_DEBUG("LaserScan [%s]: failed to transform scan: %s.  This message should not repeat (tolerance "
              "should now be set on our tf2::MessageFilter).",
              qPrintable(getName()), e.what());
    return;
  }
 
  point_cloud_common_->addMessage(cloud);
}
 
void LaserScanDisplay::update(float wall_dt, float ros_dt)
{
  point_cloud_common_->update(wall_dt, ros_dt);
}
 
void LaserScanDisplay::reset()
{
  MFDClass::reset();
  point_cloud_common_->reset();
  checkTolerance(filter_tolerance_.toSec());
}
 
} // namespace rviz
 
#include <pluginlib/class_list_macros.hpp>
PLUGINLIB_EXPORT_CLASS(rviz::LaserScanDisplay, rviz::Display)