pcl_base.cpp

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 *  Point Cloud Library (PCL) - www.pointclouds.org
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 * $Id: pcl_base.cpp 5026 2012-03-12 02:51:44Z rusu $
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#include <pcl/pcl_base.h>

void
pcl::PCLBase<sensor_msgs::PointCloud2>::setInputCloud (const PointCloud2ConstPtr &cloud)
{
  input_ = cloud;

  for (int d = 0; d < static_cast<int>(cloud->fields.size ()); ++d)
  {
    if (cloud->fields[d].name == x_field_name_)
      x_idx_ = d;
    if (cloud->fields[d].name == y_field_name_)
      y_idx_ = d;
    if (cloud->fields[d].name == z_field_name_)
      z_idx_ = d;
  }

  // Obtain the size of all fields. Restrict to sizeof FLOAT32 for now
  field_sizes_.resize (input_->fields.size ());
  for (size_t d = 0; d < input_->fields.size (); ++d)
  {
    int fsize;
    switch (input_->fields[d].datatype)
    {
      case sensor_msgs::PointField::INT8:
      case sensor_msgs::PointField::UINT8:
      {
        fsize = 1;
        break;
      }

      case sensor_msgs::PointField::INT16:
      case sensor_msgs::PointField::UINT16:
      {
        fsize = 2;
        break;
      }

      case sensor_msgs::PointField::INT32:
      case sensor_msgs::PointField::UINT32:
      case sensor_msgs::PointField::FLOAT32:
      {
        fsize = 4;
        break;
      }

      case sensor_msgs::PointField::FLOAT64:
      {
        fsize = 8;
        break;
      }

      default:
      {
        PCL_ERROR ("[PCLBase::setInputCloud] Invalid field type (%d)!\n", input_->fields[d].datatype);
        fsize = 0;
        break;
      }
    }
    field_sizes_[d] = (std::min) (fsize, static_cast<int>(sizeof (float)));
  }
}

bool
pcl::PCLBase<sensor_msgs::PointCloud2>::deinitCompute ()
{
  return (true);
}

bool
pcl::PCLBase<sensor_msgs::PointCloud2>::initCompute ()
{
  // Check if input was set
  if (!input_)
    return (false);

  // If no point indices have been given, construct a set of indices for the entire input point cloud
  if (!indices_)
  {
    fake_indices_ = true;
    indices_.reset (new std::vector<int>);
    try
    {
      indices_->resize (input_->width * input_->height);
    }
    catch (std::bad_alloc)
    {
      PCL_ERROR ("[initCompute] Failed to allocate %zu indices.\n", (input_->width * input_->height));
    }
    for (size_t i = 0; i < indices_->size (); ++i) { (*indices_)[i] = static_cast<int>(i); }
  }
  // If we have a set of fake indices, but they do not match the number of points in the cloud, update them
  if (fake_indices_ && indices_->size () != (input_->width * input_->height))
  {
    size_t indices_size = indices_->size ();
    indices_->resize (input_->width * input_->height);
    for (size_t i = indices_size; i < indices_->size (); ++i) { (*indices_)[i] = static_cast<int>(i); }
  }

  return (true);
}