pose_array_display.cpp

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/*
 * Copyright (c) 2012, 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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 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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 */

#include <OGRE/OgreManualObject.h>
#include <OGRE/OgreSceneManager.h>
#include <OGRE/OgreSceneNode.h>

#include "rviz/display_context.h"
#include "rviz/frame_manager.h"
#include "rviz/properties/color_property.h"
#include "rviz/properties/float_property.h"
#include "rviz/validate_floats.h"

#include "rviz/default_plugin/pose_array_display.h"

namespace rviz
{

PoseArrayDisplay::PoseArrayDisplay()
  : manual_object_( NULL )
{
  color_property_ = new ColorProperty( "Color", QColor( 255, 25, 0 ), "Color to draw the arrows.", this );
  length_property_ = new FloatProperty( "Arrow Length", 0.3, "Length of the arrows.", this );
}

PoseArrayDisplay::~PoseArrayDisplay()
{
  scene_manager_->destroyManualObject( manual_object_ );
}

void PoseArrayDisplay::onInitialize()
{
  MFDClass::onInitialize();
  manual_object_ = scene_manager_->createManualObject();
  manual_object_->setDynamic( true );
  scene_node_->attachObject( manual_object_ );
}

bool validateFloats( const geometry_msgs::PoseArray& msg )
{
  return validateFloats( msg.poses );
}

void PoseArrayDisplay::processMessage( const geometry_msgs::PoseArray::ConstPtr& msg )
{
  if( !validateFloats( *msg ))
  {
    setStatus( StatusProperty::Error, "Topic", "Message contained invalid floating point values (nans or infs)" );
    return;
  }

  manual_object_->clear();

  Ogre::Vector3 position;
  Ogre::Quaternion orientation;
  if( !context_->getFrameManager()->getTransform( msg->header, position, orientation ))
  {
    ROS_DEBUG( "Error transforming from frame '%s' to frame '%s'", msg->header.frame_id.c_str(), qPrintable( fixed_frame_ ));
  }

  scene_node_->setPosition( position );
  scene_node_->setOrientation( orientation );

  manual_object_->clear();

  Ogre::ColourValue color = color_property_->getOgreColor();
  float length = length_property_->getFloat();
  size_t num_poses = msg->poses.size();
  manual_object_->estimateVertexCount( num_poses * 6 );
  manual_object_->begin( "BaseWhiteNoLighting", Ogre::RenderOperation::OT_LINE_LIST );
  for( size_t i=0; i < num_poses; ++i )
  {
    Ogre::Vector3 pos( msg->poses[i].position.x,
                       msg->poses[i].position.y,
                       msg->poses[i].position.z );
    Ogre::Quaternion orient( msg->poses[i].orientation.w,
                             msg->poses[i].orientation.x,
                             msg->poses[i].orientation.y,
                             msg->poses[i].orientation.z );
    // orient here is not normalized, so the scale of the quaternion
    // will affect the scale of the arrow.

    Ogre::Vector3 vertices[6];
    vertices[0] = pos; // back of arrow
    vertices[1] = pos + orient * Ogre::Vector3( length, 0, 0 ); // tip of arrow
    vertices[2] = vertices[ 1 ];
    vertices[3] = pos + orient * Ogre::Vector3( 0.75*length, 0.2*length, 0 );
    vertices[4] = vertices[ 1 ];
    vertices[5] = pos + orient * Ogre::Vector3( 0.75*length, -0.2*length, 0 );

    for( int i = 0; i < 6; ++i )
    {
      manual_object_->position( vertices[i] );
      manual_object_->colour( color );
    }
  }
  manual_object_->end();

  context_->queueRender();
}

void PoseArrayDisplay::reset()
{
  MFDClass::reset();
  if( manual_object_ )
  {
    manual_object_->clear();
  }
}

} // namespace rviz

#include <pluginlib/class_list_macros.h>
PLUGINLIB_EXPORT_CLASS( rviz::PoseArrayDisplay, rviz::Display )