piecewise_linear_function.hpp

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/* \author Bastian Steder */


namespace pcl {

PiecewiseLinearFunction::PiecewiseLinearFunction(float factor, float offset) : factor_(factor), offset_(offset)
{
}

inline float PiecewiseLinearFunction::getValue(float point) const
{
  float vector_pos = factor_*point + offset_;
  float floored_vector_pos = floor(vector_pos);
  float interpolation_size = vector_pos-floored_vector_pos;
  int data_point_before = (std::max)(0, (std::min)(int(data_points_.size())-2, int(lrint(floored_vector_pos))));
  //cout << "Interpolating between "<<data_point_before<<" and "<<data_point_before+1<<" with value "
       //<< interpolation_size<<" (vector size is "<<data_points_.size()<<").\n";
  return data_points_[data_point_before]+interpolation_size*(data_points_[data_point_before+1]-data_points_[data_point_before]);
}

}  // end namespace pcl