/*
===============================================================================

  FILE:  lasquantizer.hpp
  
  CONTENTS:
  
    This class assists with converting between a fixed-point notation based on
    scaled integers plus large offsets and standard double-precision floating-
    point numbers. For efficieny in storage and uniform precision (far from the
    origin) the LAS format stores all point coordinates as scaled and offset
    32-bit integers.

  PROGRAMMERS:

    martin.isenburg@rapidlasso.com  -  http://rapidlasso.com

  COPYRIGHT:

    (c) 2007-2015, martin isenburg, rapidlasso - fast tools to catch reality

    This is free software; you can redistribute and/or modify it under the
    terms of the GNU Lesser General Licence as published by the Free Software
    Foundation. See the LICENSE.txt file for more information.

    This software is distributed WITHOUT ANY WARRANTY and without even the
    implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  
  CHANGE HISTORY:
  
    19 July 2015 -- created after FOSS4GE in the train back from Lake Como
  
===============================================================================
*/
#ifndef LAS_QUANTIZER_HPP
#define LAS_QUANTIZER_HPP

#include "mydefs.hpp"

class LASquantizer
{
public:
  F64 x_scale_factor;
  F64 y_scale_factor;
  F64 z_scale_factor;
  F64 x_offset;
  F64 y_offset;
  F64 z_offset;

  inline F64 get_x(const I32 X) const { return x_scale_factor*X+x_offset; };
  inline F64 get_y(const I32 Y) const { return y_scale_factor*Y+y_offset; };
  inline F64 get_z(const I32 Z) const { return z_scale_factor*Z+z_offset; };

  inline I64 get_X(const F64 x) const { if (x >= x_offset) return (I64)(((x-x_offset)/x_scale_factor)+0.5); else return (I64)(((x-x_offset)/x_scale_factor)-0.5); };
  inline I64 get_Y(const F64 y) const { if (y >= y_offset) return (I64)(((y-y_offset)/y_scale_factor)+0.5); else return (I64)(((y-y_offset)/y_scale_factor)-0.5); };
  inline I64 get_Z(const F64 z) const { if (z >= z_offset) return (I64)(((z-z_offset)/z_scale_factor)+0.5); else return (I64)(((z-z_offset)/z_scale_factor)-0.5); };

  LASquantizer()
  {
    x_scale_factor = 0.01;
    y_scale_factor = 0.01;
    z_scale_factor = 0.01;
    x_offset = 0.0;
    y_offset = 0.0;
    z_offset = 0.0;
  };

  LASquantizer & operator=(const LASquantizer & quantizer)
  {
    this->x_scale_factor = quantizer.x_scale_factor;
    this->y_scale_factor = quantizer.y_scale_factor;
    this->z_scale_factor = quantizer.z_scale_factor;
    this->x_offset = quantizer.x_offset;
    this->y_offset = quantizer.y_offset;
    this->z_offset = quantizer.z_offset;
    return *this;
  };
};

#endif
