shape_to_marker.cpp

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#include <geometric_shapes/shape_to_marker.h>
#include <sstream>
#include <stdexcept>

void geometric_shapes::constructMarkerFromShape(const shape_msgs::SolidPrimitive& shape_msg,
                                                visualization_msgs::Marker& mk)
{
  switch (shape_msg.type)
  {
    case shape_msgs::SolidPrimitive::SPHERE:
      if (shape_msg.dimensions.size() <= shape_msgs::SolidPrimitive::SPHERE_RADIUS)
        throw std::runtime_error("Insufficient dimensions in sphere definition");
      else
      {
        mk.type = visualization_msgs::Marker::SPHERE;
        mk.scale.x = mk.scale.y = mk.scale.z = shape_msg.dimensions[shape_msgs::SolidPrimitive::SPHERE_RADIUS] * 2.0;
      }
      break;
    case shape_msgs::SolidPrimitive::BOX:
      if (shape_msg.dimensions.size() <= shape_msgs::SolidPrimitive::BOX_X ||
          shape_msg.dimensions.size() <= shape_msgs::SolidPrimitive::BOX_Y ||
          shape_msg.dimensions.size() <= shape_msgs::SolidPrimitive::BOX_Z)
        throw std::runtime_error("Insufficient dimensions in box definition");
      else
      {
        mk.type = visualization_msgs::Marker::CUBE;
        mk.scale.x = shape_msg.dimensions[shape_msgs::SolidPrimitive::BOX_X];
        mk.scale.y = shape_msg.dimensions[shape_msgs::SolidPrimitive::BOX_Y];
        mk.scale.z = shape_msg.dimensions[shape_msgs::SolidPrimitive::BOX_Z];
      }
      break;
    case shape_msgs::SolidPrimitive::CONE:
      if (shape_msg.dimensions.size() <= shape_msgs::SolidPrimitive::CONE_RADIUS ||
          shape_msg.dimensions.size() <= shape_msgs::SolidPrimitive::CONE_HEIGHT)
        throw std::runtime_error("Insufficient dimensions in cone definition");
      else
      {
        // there is no CONE marker, so this produces a cylinder marker as well
        mk.type = visualization_msgs::Marker::CYLINDER;
        mk.scale.x = shape_msg.dimensions[shape_msgs::SolidPrimitive::CONE_RADIUS] * 2.0;
        mk.scale.y = mk.scale.x;
        mk.scale.z = shape_msg.dimensions[shape_msgs::SolidPrimitive::CONE_HEIGHT];
      }
      break;
    case shape_msgs::SolidPrimitive::CYLINDER:
      if (shape_msg.dimensions.size() <= shape_msgs::SolidPrimitive::CYLINDER_RADIUS ||
          shape_msg.dimensions.size() <= shape_msgs::SolidPrimitive::CYLINDER_HEIGHT)
        throw std::runtime_error("Insufficient dimensions in cylinder definition");
      else
      {
        mk.type = visualization_msgs::Marker::CYLINDER;
        mk.scale.x = shape_msg.dimensions[shape_msgs::SolidPrimitive::CYLINDER_RADIUS] * 2.0;
        mk.scale.y = mk.scale.x;
        mk.scale.z = shape_msg.dimensions[shape_msgs::SolidPrimitive::CYLINDER_HEIGHT];
      }
      break;
    default:
    {
      std::stringstream ss;
      ss << shape_msg.type;
      throw std::runtime_error("Unknown shape type: " + ss.str());
    }
  }
}

void geometric_shapes::constructMarkerFromShape(const shape_msgs::Mesh& shape_msg, visualization_msgs::Marker& mk,
                                                bool use_mesh_triangle_list)
{
  if (shape_msg.triangles.empty() || shape_msg.vertices.empty())
    throw std::runtime_error("Mesh definition is empty");
  if (use_mesh_triangle_list)
  {
    mk.type = visualization_msgs::Marker::TRIANGLE_LIST;
    mk.scale.x = mk.scale.y = mk.scale.z = 1.0;
    for (std::size_t i = 0; i < shape_msg.triangles.size(); ++i)
    {
      mk.points.push_back(shape_msg.vertices[shape_msg.triangles[i].vertex_indices[0]]);
      mk.points.push_back(shape_msg.vertices[shape_msg.triangles[i].vertex_indices[1]]);
      mk.points.push_back(shape_msg.vertices[shape_msg.triangles[i].vertex_indices[2]]);
    }
  }
  else
  {
    mk.type = visualization_msgs::Marker::LINE_LIST;
    mk.scale.x = mk.scale.y = mk.scale.z = 0.01;
    for (std::size_t i = 0; i < shape_msg.triangles.size(); ++i)
    {
      mk.points.push_back(shape_msg.vertices[shape_msg.triangles[i].vertex_indices[0]]);
      mk.points.push_back(shape_msg.vertices[shape_msg.triangles[i].vertex_indices[1]]);
      mk.points.push_back(shape_msg.vertices[shape_msg.triangles[i].vertex_indices[0]]);
      mk.points.push_back(shape_msg.vertices[shape_msg.triangles[i].vertex_indices[2]]);
      mk.points.push_back(shape_msg.vertices[shape_msg.triangles[i].vertex_indices[1]]);
      mk.points.push_back(shape_msg.vertices[shape_msg.triangles[i].vertex_indices[2]]);
    }
  }
}