DistanceLimit.cpp

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// kate: replace-tabs off; indent-width 4; indent-mode normal
// vim: ts=4:sw=4:noexpandtab
/*

Copyright (c) 2010--2018,
François Pomerleau and Stephane Magnenat, ASL, ETHZ, Switzerland
You can contact the authors at <f dot pomerleau at gmail dot com> and
<stephane at magnenat dot net>

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 <organization> 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
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*/
#include "DistanceLimit.h"
#include "pointmatcher/Functions.h"

// DistanceLimitDataPointsFilter
// Constructor
template<typename T>
DistanceLimitDataPointsFilter<T>::DistanceLimitDataPointsFilter(const Parameters& params) :
                PointMatcher<T>::DataPointsFilter("DistanceLimitDataPointsFilter",
                                                                                  DistanceLimitDataPointsFilter::availableParameters(), params),
                dim(Parametrizable::get<unsigned>("dim")),
                dist(Parametrizable::get<T>("dist")),
                removeInside(Parametrizable::get<bool>("removeInside"))
{
}

template<typename T>
typename PointMatcher<T>::DataPoints DistanceLimitDataPointsFilter<T>::filter(
        const DataPoints& input)
{
        DataPoints output(input);
        inPlaceFilter(output);
        return output;
}

// In-place filter
template<typename T>
void DistanceLimitDataPointsFilter<T>::inPlaceFilter(
        DataPoints& cloud)
{
        using namespace PointMatcherSupport;

        if(dim >= cloud.features.rows() - 1)
        {
                throw InvalidParameter(
                                (boost::format("DistanceLimitDataPointsFilter: Error, filtering on dimension number %1%, larger than authorized axis id %2%") % dim % (cloud.features.rows() - 2)).str());
        }

        const int nbPointsIn = cloud.features.cols();
        const int nbRows = cloud.features.rows();

        int j = 0;
        if(dim == -1) // Euclidean distance
        {
                const T absMaxDist = anyabs(dist);
                for(int i = 0; i < nbPointsIn; ++i)
                {
                        if(removeInside)
                        {
                                if(cloud.features.col(i).head(nbRows-1).norm() > absMaxDist)
                                {
                                        cloud.setColFrom(j, cloud, i);
                                        ++j;
                                }
                        }
                        else
                        {
                                if(cloud.features.col(i).head(nbRows-1).norm() < absMaxDist)
                                {
                                        cloud.setColFrom(j, cloud, i);
                                        ++j;
                                }
                        }
                }
        }
        else // Single-axis distance
        {
                for(int i = 0; i < nbPointsIn; ++i)
                {
                        if(removeInside)
                        {
                                if((cloud.features(dim, i)) > dist)
                                {
                                        cloud.setColFrom(j, cloud, i);
                                        ++j;
                                }
                        }
                        else
                        {
                                if((cloud.features(dim, i)) < dist)
                                {
                                        cloud.setColFrom(j, cloud, i);
                                        ++j;
                                }
                        }
                }
        }

        cloud.conservativeResize(j);
}

template struct DistanceLimitDataPointsFilter<float>;
template struct DistanceLimitDataPointsFilter<double>;