pcdfilter_pa_ros_filter.h

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/******************************************************************************
*                                                                             *
* pcdfilter_pa_ros_filter.h                                                   *
* =========================                                                   *
*                                                                             *
*******************************************************************************
*                                                                             *
* github repository                                                           *
*   https://github.com/peterweissig/ros_pcdfilter                             *
*                                                                             *
* Chair of Automation Technology, Technische Universität Chemnitz             *
*   https://www.tu-chemnitz.de/etit/proaut                                    *
*                                                                             *
*******************************************************************************
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* New BSD License                                                             *
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* Copyright (c) 2015-2017, Peter Weissig, Technische Universität Chemnitz     *
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#ifndef __PCD_FILTER_PA_ROS_FILTER_H
#define __PCD_FILTER_PA_ROS_FILTER_H

// local headers
#include "pcdfilter_pa/pcdfilter_pa_filter.h"

// ros headers
#include <tf/transform_datatypes.h>
#include <tf/transform_listener.h>

// additional libraries
#include <opencv2/highgui/highgui.hpp>

// standard headers
#include <string>
#include <vector>

//**************************[cPcdFilterPaRosFilter]****************************
class cPcdFilterPaRosFilter {
  public:
    enum eFiltertype {
        ftNONE     = cPcdFilterPaFilter::ftNONE,
        ftCUBE     = cPcdFilterPaFilter::ftCUBE,
        ftSPHERE   = cPcdFilterPaFilter::ftSPHERE,
        ftBLOCK    = cPcdFilterPaFilter::ftBLOCK,
        ftCYLINDER = cPcdFilterPaFilter::ftCYLINDER,
        ftCONE     = cPcdFilterPaFilter::ftCONE,
        ftLINK
    };
    enum {
        COUNT_PARAMETER = 3,
        COUNT_FRAME     = 2
    };

    cPcdFilterPaRosFilter();
    cPcdFilterPaRosFilter(const cPcdFilterPaRosFilter &other);
    cPcdFilterPaRosFilter& operator = (
      const cPcdFilterPaRosFilter &other);

    bool inverse_;

    eFiltertype type_;

    bool required_;

    double parameter_[COUNT_PARAMETER];

    std::string frame_[COUNT_FRAME];

    // additional offsets relative to frames
    tf::Transform offset_[COUNT_FRAME];

    std::string comment_;

    bool fromString(const std::string &filter);
    std::string toString(void) const;

    void reset(void);

    bool isValid(void) const;

  private:
    bool _skipWhitespace(const std::string &str, int &pos) const;

    bool _checkSymbol(const std::string &str, int &pos,
        const char symbol) const;

    std::string _getValue(const std::string &str, int &pos) const;

    std::string _getComment(const std::string &str) const;

    std::string _floatToStr(const double &value) const;

    bool _StrToFloat(const std::string &str, double &value) const;
};

//**************************[cPcdFilterPaRosFilters]***************************
class cPcdFilterPaRosFilters {
  public:
    cPcdFilterPaRosFilters();


    // adds a new filter
    bool add(std::string filter);

    // clears all filters
    void clear(void);

    // return all filters
    std::vector<std::string> get(void) const;

    // returns simple filters based on numbers instead of frames
    bool update( const tf::TransformListener &tf_listener,
      const std::string base_frame, const ros::Time time,
      std::vector<cPcdFilterPaFilter> &result) const;

    // returns last added filter (also includes erroneous filters)
    std::string getLast(void) const;

    // return number of elements
    int size(void) const;

    // access single element
    cPcdFilterPaRosFilter& operator[](int i);
    // access single element (const)
    const cPcdFilterPaRosFilter& operator[](int i) const;

    // time before tf lookup fails - for updating filters
    double tf_lookup_time_;

  protected:
    // get tansform between two tfs
    double update_transform(const tf::Transform &start,
      const tf::Transform &goal, tf::Transform &result,
      const double relative_pos = 0.0) const;


    std::vector<cPcdFilterPaRosFilter> filters_;

    cPcdFilterPaRosFilter last_filter_;
};

#endif // __PCD_FILTER_PA_ROS_FILTER_H