map_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
 * 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 <boost/bind.hpp>

#include <OgreManualObject.h>
#include <OgreMaterialManager.h>
#include <OgreSceneManager.h>
#include <OgreSceneNode.h>
#include <OgreTextureManager.h>
#include <OgreTechnique.h>
#include <OgreSharedPtr.h>

#include <ros/ros.h>

#include "rviz/frame_manager.h"
#include "rviz/ogre_helpers/custom_parameter_indices.h"
#include "rviz/ogre_helpers/grid.h"
#include "rviz/properties/enum_property.h"
#include "rviz/properties/float_property.h"
#include "rviz/properties/int_property.h"
#include "rviz/properties/property.h"
#include "rviz/properties/quaternion_property.h"
#include "rviz/properties/ros_topic_property.h"
#include "rviz/properties/vector_property.h"
#include "rviz/validate_floats.h"
#include "rviz/validate_quaternions.h"
#include "rviz/display_context.h"

#include "map_display.h"

namespace rviz
{
// helper class to set alpha parameter on all renderables.
class AlphaSetter : public Ogre::Renderable::Visitor
{
public:
  AlphaSetter(float alpha) : alpha_vec_(alpha, alpha, alpha, alpha)
  {
  }

  void visit(Ogre::Renderable* rend,
             ushort /*lodIndex*/,
             bool /*isDebug*/,
             Ogre::Any* /*pAny*/ = nullptr) override
  {
    rend->setCustomParameter(ALPHA_PARAMETER, alpha_vec_);
  }

private:
  Ogre::Vector4 alpha_vec_;
};


Swatch::Swatch(MapDisplay* parent,
               unsigned int x,
               unsigned int y,
               unsigned int width,
               unsigned int height,
               float resolution)
  : parent_(parent), manual_object_(nullptr), x_(x), y_(y), width_(width), height_(height)
{
  // Set up map material
  static int material_count = 0;
  std::stringstream ss;
  ss << "MapMaterial" << material_count++;
  material_ = Ogre::MaterialManager::getSingleton().getByName("rviz/Indexed8BitImage");
  material_ = material_->clone(ss.str());

  material_->setReceiveShadows(false);
  material_->getTechnique(0)->setLightingEnabled(false);
  material_->setDepthBias(-16.0f, 0.0f);
  material_->setCullingMode(Ogre::CULL_NONE);
  material_->setDepthWriteEnabled(false);

  static int map_count = 0;
  std::stringstream ss2;
  ss2 << "MapObject" << map_count++;
  manual_object_ = parent_->scene_manager_->createManualObject(ss2.str());

  static int node_count = 0;
  std::stringstream ss3;
  ss3 << "NodeObject" << node_count++;

  scene_node_ = parent_->scene_node_->createChildSceneNode(ss3.str());
  scene_node_->attachObject(manual_object_);

  manual_object_->begin(material_->getName(), Ogre::RenderOperation::OT_TRIANGLE_LIST);
  {
    // First triangle
    {
      // Bottom left
      manual_object_->position(0.0f, 0.0f, 0.0f);
      manual_object_->textureCoord(0.0f, 0.0f);
      manual_object_->normal(0.0f, 0.0f, 1.0f);

      // Top right
      manual_object_->position(1.0f, 1.0f, 0.0f);
      manual_object_->textureCoord(1.0f, 1.0f);
      manual_object_->normal(0.0f, 0.0f, 1.0f);

      // Top left
      manual_object_->position(0.0f, 1.0f, 0.0f);
      manual_object_->textureCoord(0.0f, 1.0f);
      manual_object_->normal(0.0f, 0.0f, 1.0f);
    }

    // Second triangle
    {
      // Bottom left
      manual_object_->position(0.0f, 0.0f, 0.0f);
      manual_object_->textureCoord(0.0f, 0.0f);
      manual_object_->normal(0.0f, 0.0f, 1.0f);

      // Bottom right
      manual_object_->position(1.0f, 0.0f, 0.0f);
      manual_object_->textureCoord(1.0f, 0.0f);
      manual_object_->normal(0.0f, 0.0f, 1.0f);

      // Top right
      manual_object_->position(1.0f, 1.0f, 0.0f);
      manual_object_->textureCoord(1.0f, 1.0f);
      manual_object_->normal(0.0f, 0.0f, 1.0f);
    }
  }
  manual_object_->end();

  scene_node_->setPosition(x * resolution, y * resolution, 0);
  scene_node_->setScale(width * resolution, height * resolution, 1.0);

  if (parent_->draw_under_property_->getValue().toBool())
  {
    manual_object_->setRenderQueueGroup(Ogre::RENDER_QUEUE_4);
  }

  // don't show map until the plugin is actually enabled
  manual_object_->setVisible(false);
}

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

void Swatch::updateAlpha(const Ogre::SceneBlendType sceneBlending,
                         bool depthWrite,
                         AlphaSetter* alpha_setter)
{
  material_->setSceneBlending(sceneBlending);
  material_->setDepthWriteEnabled(depthWrite);
  if (manual_object_)
  {
    manual_object_->visitRenderables(alpha_setter);
  }
}

void Swatch::updateData()
{
  unsigned int pixels_size = width_ * height_;
  unsigned char* pixels = new unsigned char[pixels_size];
  memset(pixels, 255, pixels_size);
  unsigned char* ptr = pixels;
  int N = parent_->current_map_.data.size();
  unsigned int fw = parent_->current_map_.info.width;

  for (unsigned int yy = y_; yy < y_ + height_; yy++)
  {
    int index = yy * fw + x_;
    int pixels_to_copy = std::min((int)width_, N - index);
    memcpy(ptr, &parent_->current_map_.data[index], pixels_to_copy);
    ptr += pixels_to_copy;
    if (index + pixels_to_copy >= N)
      break;
  }

  Ogre::DataStreamPtr pixel_stream;
  pixel_stream.bind(new Ogre::MemoryDataStream(pixels, pixels_size));

  if (!texture_.isNull())
  {
    Ogre::TextureManager::getSingleton().remove(texture_->getName());
    texture_.setNull();
  }

  static int tex_count = 0;
  std::stringstream ss;
  ss << "MapTexture" << tex_count++;
  texture_ = Ogre::TextureManager::getSingleton().loadRawData(
      ss.str(), Ogre::ResourceGroupManager::DEFAULT_RESOURCE_GROUP_NAME, pixel_stream, width_, height_,
      Ogre::PF_L8, Ogre::TEX_TYPE_2D, 0);

  delete[] pixels;
}


MapDisplay::MapDisplay() : Display(), loaded_(false), resolution_(0.0f), width_(0), height_(0)
{
  connect(this, SIGNAL(mapUpdated()), this, SLOT(showMap()));
  topic_property_ = new RosTopicProperty(
      "Topic", "", QString::fromStdString(ros::message_traits::datatype<nav_msgs::OccupancyGrid>()),
      "nav_msgs::OccupancyGrid topic to subscribe to.", this, SLOT(updateTopic()));

  alpha_property_ = new FloatProperty("Alpha", 0.7, "Amount of transparency to apply to the map.", this,
                                      SLOT(updateAlpha()));
  alpha_property_->setMin(0);
  alpha_property_->setMax(1);

  color_scheme_property_ = new EnumProperty("Color Scheme", "map", "How to color the occupancy values.",
                                            this, SLOT(updatePalette()));
  // Option values here must correspond to indices in palette_textures_ array in onInitialize() below.
  color_scheme_property_->addOption("map", 0);
  color_scheme_property_->addOption("costmap", 1);
  color_scheme_property_->addOption("raw", 2);

  draw_under_property_ = new Property(
      "Draw Behind", false,
      "Rendering option, controls whether or not the map is always drawn behind everything else.", this,
      SLOT(updateDrawUnder()));

  resolution_property_ =
      new FloatProperty("Resolution", 0, "Resolution of the map. (not editable)", this);
  resolution_property_->setReadOnly(true);

  width_property_ = new IntProperty("Width", 0, "Width of the map, in meters. (not editable)", this);
  width_property_->setReadOnly(true);

  height_property_ = new IntProperty("Height", 0, "Height of the map, in meters. (not editable)", this);
  height_property_->setReadOnly(true);

  position_property_ =
      new VectorProperty("Position", Ogre::Vector3::ZERO,
                         "Position of the bottom left corner of the map, in meters. (not editable)",
                         this);
  position_property_->setReadOnly(true);

  orientation_property_ = new QuaternionProperty("Orientation", Ogre::Quaternion::IDENTITY,
                                                 "Orientation of the map. (not editable)", this);
  orientation_property_->setReadOnly(true);

  unreliable_property_ =
      new BoolProperty("Unreliable", false, "Prefer UDP topic transport", this, SLOT(updateTopic()));

  transform_timestamp_property_ = new BoolProperty(
      "Use Timestamp", false, "Use map header timestamp when transforming", this, SLOT(transformMap()));
}

MapDisplay::~MapDisplay()
{
  unsubscribe();
  clear();
  for (unsigned i = 0; i < swatches.size(); i++)
  {
    delete swatches[i];
  }
  swatches.clear();
}

unsigned char* makeMapPalette()
{
  unsigned char* palette = OGRE_ALLOC_T(unsigned char, 256 * 4, Ogre::MEMCATEGORY_GENERAL);
  unsigned char* palette_ptr = palette;
  // Standard gray map palette values
  for (int i = 0; i <= 100; i++)
  {
    unsigned char v = 255 - (255 * i) / 100;
    *palette_ptr++ = v;   // red
    *palette_ptr++ = v;   // green
    *palette_ptr++ = v;   // blue
    *palette_ptr++ = 255; // alpha
  }
  // illegal positive values in green
  for (int i = 101; i <= 127; i++)
  {
    *palette_ptr++ = 0;   // red
    *palette_ptr++ = 255; // green
    *palette_ptr++ = 0;   // blue
    *palette_ptr++ = 255; // alpha
  }
  // illegal negative (char) values in shades of red/yellow
  for (int i = 128; i <= 254; i++)
  {
    *palette_ptr++ = 255;                             // red
    *palette_ptr++ = (255 * (i - 128)) / (254 - 128); // green
    *palette_ptr++ = 0;                               // blue
    *palette_ptr++ = 255;                             // alpha
  }
  // legal -1 value is tasteful blueish greenish grayish color
  *palette_ptr++ = 0x70; // red
  *palette_ptr++ = 0x89; // green
  *palette_ptr++ = 0x86; // blue
  *palette_ptr++ = 255;  // alpha

  return palette;
}

unsigned char* makeCostmapPalette()
{
  unsigned char* palette = OGRE_ALLOC_T(unsigned char, 256 * 4, Ogre::MEMCATEGORY_GENERAL);
  unsigned char* palette_ptr = palette;

  // zero values have alpha=0
  *palette_ptr++ = 0; // red
  *palette_ptr++ = 0; // green
  *palette_ptr++ = 0; // blue
  *palette_ptr++ = 0; // alpha

  // Blue to red spectrum for most normal cost values
  for (int i = 1; i <= 98; i++)
  {
    unsigned char v = (255 * i) / 100;
    *palette_ptr++ = v;       // red
    *palette_ptr++ = 0;       // green
    *palette_ptr++ = 255 - v; // blue
    *palette_ptr++ = 255;     // alpha
  }
  // inscribed obstacle values (99) in cyan
  *palette_ptr++ = 0;   // red
  *palette_ptr++ = 255; // green
  *palette_ptr++ = 255; // blue
  *palette_ptr++ = 255; // alpha
  // lethal obstacle values (100) in purple
  *palette_ptr++ = 255; // red
  *palette_ptr++ = 0;   // green
  *palette_ptr++ = 255; // blue
  *palette_ptr++ = 255; // alpha
  // illegal positive values in green
  for (int i = 101; i <= 127; i++)
  {
    *palette_ptr++ = 0;   // red
    *palette_ptr++ = 255; // green
    *palette_ptr++ = 0;   // blue
    *palette_ptr++ = 255; // alpha
  }
  // illegal negative (char) values in shades of red/yellow
  for (int i = 128; i <= 254; i++)
  {
    *palette_ptr++ = 255;                             // red
    *palette_ptr++ = (255 * (i - 128)) / (254 - 128); // green
    *palette_ptr++ = 0;                               // blue
    *palette_ptr++ = 255;                             // alpha
  }
  // legal -1 value is tasteful blueish greenish grayish color
  *palette_ptr++ = 0x70; // red
  *palette_ptr++ = 0x89; // green
  *palette_ptr++ = 0x86; // blue
  *palette_ptr++ = 255;  // alpha

  return palette;
}

unsigned char* makeRawPalette()
{
  unsigned char* palette = OGRE_ALLOC_T(unsigned char, 256 * 4, Ogre::MEMCATEGORY_GENERAL);
  unsigned char* palette_ptr = palette;
  // Standard gray map palette values
  for (int i = 0; i < 256; i++)
  {
    *palette_ptr++ = i;   // red
    *palette_ptr++ = i;   // green
    *palette_ptr++ = i;   // blue
    *palette_ptr++ = 255; // alpha
  }

  return palette;
}

Ogre::TexturePtr makePaletteTexture(unsigned char* palette_bytes)
{
  Ogre::DataStreamPtr palette_stream;
  palette_stream.bind(new Ogre::MemoryDataStream(palette_bytes, 256 * 4, true));

  static int palette_tex_count = 0;
  std::stringstream ss;
  ss << "MapPaletteTexture" << palette_tex_count++;
  return Ogre::TextureManager::getSingleton().loadRawData(
      ss.str(), Ogre::ResourceGroupManager::DEFAULT_RESOURCE_GROUP_NAME, palette_stream, 256, 1,
      Ogre::PF_BYTE_RGBA, Ogre::TEX_TYPE_1D, 0);
}

void MapDisplay::onInitialize()
{
  // Order of palette textures here must match option indices for color_scheme_property_ above.
  palette_textures_.push_back(makePaletteTexture(makeMapPalette()));
  color_scheme_transparency_.push_back(false);
  palette_textures_.push_back(makePaletteTexture(makeCostmapPalette()));
  color_scheme_transparency_.push_back(true);
  palette_textures_.push_back(makePaletteTexture(makeRawPalette()));
  color_scheme_transparency_.push_back(true);
}

void MapDisplay::onEnable()
{
  subscribe();
}

void MapDisplay::onDisable()
{
  unsubscribe();
  clear();
}

void MapDisplay::subscribe()
{
  if (!isEnabled())
  {
    return;
  }

  if (!topic_property_->getTopic().isEmpty())
  {
    try
    {
      if (unreliable_property_->getBool())
      {
        map_sub_ = update_nh_.subscribe(topic_property_->getTopicStd(), 1, &MapDisplay::incomingMap,
                                        this, ros::TransportHints().unreliable());
      }
      else
      {
        map_sub_ = update_nh_.subscribe(topic_property_->getTopicStd(), 1, &MapDisplay::incomingMap,
                                        this, ros::TransportHints().reliable());
      }
      setStatus(StatusProperty::Ok, "Topic", "OK");
    }
    catch (ros::Exception& e)
    {
      setStatus(StatusProperty::Error, "Topic", QString("Error subscribing: ") + e.what());
    }

    try
    {
      update_sub_ = update_nh_.subscribe(topic_property_->getTopicStd() + "_updates", 1,
                                         &MapDisplay::incomingUpdate, this);
      setStatus(StatusProperty::Ok, "Update Topic", "OK");
    }
    catch (ros::Exception& e)
    {
      setStatus(StatusProperty::Error, "Update Topic", QString("Error subscribing: ") + e.what());
    }
  }
}

void MapDisplay::unsubscribe()
{
  map_sub_.shutdown();
  update_sub_.shutdown();
}

void MapDisplay::updateAlpha()
{
  float alpha = alpha_property_->getFloat();
  Ogre::SceneBlendType sceneBlending;
  bool depthWrite;

  if (alpha < 0.9998 || color_scheme_transparency_[color_scheme_property_->getOptionInt()])
  {
    sceneBlending = Ogre::SBT_TRANSPARENT_ALPHA;
    depthWrite = false;
  }
  else
  {
    sceneBlending = Ogre::SBT_REPLACE;
    depthWrite = !draw_under_property_->getValue().toBool();
  }

  AlphaSetter alpha_setter(alpha);

  for (unsigned i = 0; i < swatches.size(); i++)
  {
    swatches[i]->updateAlpha(sceneBlending, depthWrite, &alpha_setter);
  }
}

void MapDisplay::updateDrawUnder()
{
  bool draw_under = draw_under_property_->getValue().toBool();

  if (alpha_property_->getFloat() >= 0.9998)
  {
    for (unsigned i = 0; i < swatches.size(); i++)
      swatches[i]->material_->setDepthWriteEnabled(!draw_under);
  }

  int group = draw_under ? Ogre::RENDER_QUEUE_4 : Ogre::RENDER_QUEUE_MAIN;
  for (unsigned i = 0; i < swatches.size(); i++)
  {
    if (swatches[i]->manual_object_)
      swatches[i]->manual_object_->setRenderQueueGroup(group);
  }
}

void MapDisplay::updateTopic()
{
  unsubscribe();
  subscribe();
  clear();
}

void MapDisplay::clear()
{
  setStatus(StatusProperty::Warn, "Message", "No map received");

  if (!loaded_)
  {
    return;
  }

  for (unsigned i = 0; i < swatches.size(); i++)
  {
    if (swatches[i]->manual_object_)
      swatches[i]->manual_object_->setVisible(false);

    if (!swatches[i]->texture_.isNull())
    {
      Ogre::TextureManager::getSingleton().remove(swatches[i]->texture_->getName());
      swatches[i]->texture_.setNull();
    }
  }

  loaded_ = false;
}

bool validateFloats(const nav_msgs::OccupancyGrid& msg)
{
  bool valid = true;
  valid = valid && validateFloats(msg.info.resolution);
  valid = valid && validateFloats(msg.info.origin);
  return valid;
}

void MapDisplay::incomingMap(const nav_msgs::OccupancyGrid::ConstPtr& msg)
{
  current_map_ = *msg;
  // updated via signal in case ros spinner is in a different thread
  Q_EMIT mapUpdated();
  loaded_ = true;
}


void MapDisplay::incomingUpdate(const map_msgs::OccupancyGridUpdate::ConstPtr& update)
{
  // Only update the map if we have gotten a full one first.
  if (!loaded_)
  {
    return;
  }

  // Reject updates which have any out-of-bounds data.
  if (update->x < 0 || update->y < 0 || current_map_.info.width < update->x + update->width ||
      current_map_.info.height < update->y + update->height)
  {
    setStatus(StatusProperty::Error, "Update", "Update area outside of original map area.");
    return;
  }

  // Copy the incoming data into current_map_'s data.
  for (size_t y = 0; y < update->height; y++)
  {
    memcpy(&current_map_.data[(update->y + y) * current_map_.info.width + update->x],
           &update->data[y * update->width], update->width);
  }
  // updated via signal in case ros spinner is in a different thread
  Q_EMIT mapUpdated();
}

void MapDisplay::createSwatches()
{
  int width = current_map_.info.width;
  int height = current_map_.info.height;
  float resolution = current_map_.info.resolution;

  int sw = width;
  int sh = height;
  int n_swatches = 1;

  for (int i = 0; i < 4; i++)
  {
    ROS_INFO("Creating %d swatches", n_swatches);
    for (unsigned i = 0; i < swatches.size(); i++)
    {
      delete swatches[i];
    }
    swatches.clear();
    try
    {
      int x = 0;
      int y = 0;
      for (int i = 0; i < n_swatches; i++)
      {
        int tw, th;
        if (width - x - sw >= sw)
          tw = sw;
        else
          tw = width - x;

        if (height - y - sh >= sh)
          th = sh;
        else
          th = height - y;

        swatches.push_back(new Swatch(this, x, y, tw, th, resolution));
        swatches[i]->updateData();

        x += tw;
        if (x >= width)
        {
          x = 0;
          y += sh;
        }
      }
      updateAlpha();
      return;
    }
    catch (Ogre::RenderingAPIException&)
    {
      ROS_WARN("Failed to create %d swatches", n_swatches);
      if (sw > sh)
        sw /= 2;
      else
        sh /= 2;
      n_swatches *= 2;
    }
  }
}

void MapDisplay::showMap()
{
  if (current_map_.data.empty())
  {
    return;
  }

  if (!validateFloats(current_map_))
  {
    setStatus(StatusProperty::Error, "Map",
              "Message contained invalid floating point values (nans or infs)");
    return;
  }

  if (!validateQuaternions(current_map_.info.origin))
  {
    ROS_WARN_ONCE_NAMED("quaternions",
                        "Map received on topic '%s' contains unnormalized quaternions. "
                        "This warning will only be output once but may be true for others; "
                        "enable DEBUG messages for ros.rviz.quaternions to see more details.",
                        topic_property_->getTopicStd().c_str());
    ROS_DEBUG_NAMED("quaternions", "Map received on topic '%s' contains unnormalized quaternions.",
                    topic_property_->getTopicStd().c_str());
  }

  if (current_map_.info.width * current_map_.info.height == 0)
  {
    std::stringstream ss;
    ss << "Map is zero-sized (" << current_map_.info.width << "x" << current_map_.info.height << ")";
    setStatus(StatusProperty::Error, "Map", QString::fromStdString(ss.str()));
    return;
  }

  setStatus(StatusProperty::Ok, "Message", "Map received");

  ROS_DEBUG("Received a %d X %d map @ %.3f m/pix\n", current_map_.info.width, current_map_.info.height,
            current_map_.info.resolution);

  float resolution = current_map_.info.resolution;

  int width = current_map_.info.width;
  int height = current_map_.info.height;

  if (width != width_ || height != height_ || resolution_ != resolution)
  {
    createSwatches();
    width_ = width;
    height_ = height;
    resolution_ = resolution;
  }

  Ogre::Vector3 position(current_map_.info.origin.position.x, current_map_.info.origin.position.y,
                         current_map_.info.origin.position.z);
  Ogre::Quaternion orientation;
  normalizeQuaternion(current_map_.info.origin.orientation, orientation);

  frame_ = current_map_.header.frame_id;
  if (frame_.empty())
  {
    frame_ = "/map";
  }

  bool map_status_set = false;
  if (width * height != static_cast<int>(current_map_.data.size()))
  {
    std::stringstream ss;
    ss << "Data size doesn't match width*height: width = " << width << ", height = " << height
       << ", data size = " << current_map_.data.size();
    setStatus(StatusProperty::Error, "Map", QString::fromStdString(ss.str()));
    map_status_set = true;
  }

  for (size_t i = 0; i < swatches.size(); i++)
  {
    swatches[i]->updateData();

    Ogre::Pass* pass = swatches[i]->material_->getTechnique(0)->getPass(0);
    Ogre::TextureUnitState* tex_unit = nullptr;
    if (pass->getNumTextureUnitStates() > 0)
    {
      tex_unit = pass->getTextureUnitState(0);
    }
    else
    {
      tex_unit = pass->createTextureUnitState();
    }

    tex_unit->setTextureName(swatches[i]->texture_->getName());
    tex_unit->setTextureFiltering(Ogre::TFO_NONE);
    swatches[i]->manual_object_->setVisible(true);
  }


  if (!map_status_set)
  {
    setStatus(StatusProperty::Ok, "Map", "Map OK");
  }
  updatePalette();

  resolution_property_->setValue(resolution);
  width_property_->setValue(width);
  height_property_->setValue(height);
  position_property_->setVector(position);
  orientation_property_->setQuaternion(orientation);

  transformMap();

  context_->queueRender();
}

void MapDisplay::updatePalette()
{
  int palette_index = color_scheme_property_->getOptionInt();

  for (unsigned i = 0; i < swatches.size(); i++)
  {
    Ogre::Pass* pass = swatches[i]->material_->getTechnique(0)->getPass(0);
    Ogre::TextureUnitState* palette_tex_unit = nullptr;
    if (pass->getNumTextureUnitStates() > 1)
    {
      palette_tex_unit = pass->getTextureUnitState(1);
    }
    else
    {
      palette_tex_unit = pass->createTextureUnitState();
    }
    palette_tex_unit->setTextureName(palette_textures_[palette_index]->getName());
    palette_tex_unit->setTextureFiltering(Ogre::TFO_NONE);
  }

  updateAlpha();
}

void MapDisplay::transformMap()
{
  if (!loaded_)
  {
    return;
  }

  ros::Time transform_time;

  if (transform_timestamp_property_->getBool())
  {
    transform_time = current_map_.header.stamp;
  }

  Ogre::Vector3 position;
  Ogre::Quaternion orientation;
  if (!context_->getFrameManager()->transform(frame_, transform_time, current_map_.info.origin, position,
                                              orientation) &&
      !context_->getFrameManager()->transform(frame_, ros::Time(0), current_map_.info.origin, position,
                                              orientation))
  {
    ROS_DEBUG("Error transforming map '%s' from frame '%s' to frame '%s'", qPrintable(getName()),
              frame_.c_str(), qPrintable(fixed_frame_));

    setStatus(StatusProperty::Error, "Transform",
              "No transform from [" + QString::fromStdString(frame_) + "] to [" + fixed_frame_ + "]");
  }
  else
  {
    setStatus(StatusProperty::Ok, "Transform", "Transform OK");
  }

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

void MapDisplay::fixedFrameChanged()
{
  transformMap();
}

void MapDisplay::reset()
{
  Display::reset();

  clear();
  // Force resubscription so that the map will be re-sent
  updateTopic();
}

void MapDisplay::setTopic(const QString& topic, const QString& /*datatype*/)
{
  topic_property_->setString(topic);
}

void MapDisplay::update(float /*wall_dt*/, float /*ros_dt*/)
{
  transformMap();
}

} // namespace rviz

#include <pluginlib/class_list_macros.hpp>
PLUGINLIB_EXPORT_CLASS(rviz::MapDisplay, rviz::Display)