examplePlaneProbingTetrahedronEstimator.cpp

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#include <iostream>
#include "ConfigExamples.h"
#include "DGtal/helpers/StdDefs.h"
#include "DGtal/base/Common.h"
#include "DGtal/geometry/surfaces/DigitalPlanePredicate.h"
#include "DGtal/geometry/surfaces/estimation/PlaneProbingTetrahedronEstimator.h"
 
using namespace std;
using namespace DGtal;
 
using Integer = int;
using Space   = SpaceND<3, Integer>;
using Point   = Space::Vector;
using Vector  = Space::Point;
 
 
int main(void)
{
  // The general form is ProbingEstimator<Predicate, mode> where
  // - Predicate is a model of concepts::PointPredicate, see DigitalPlanePredicate or DigitalSurfacePredicate for instance,
  // - mode specifies the candidate set, it is one of { ProbingMode::H, ProbingMode::R, ProbingMode::R1 }.
  using DigitalPlane = DigitalPlanePredicate<Space>;
  using Estimator    = PlaneProbingTetrahedronEstimator<DigitalPlane, ProbingMode::R1>;
 
  // We start by constructing the predicate, here a standard digital plane of normal (2, 6, 15)
  Vector n(2, 6, 15);
  DigitalPlane plane(n, 0, n.norm1());
 
  // Instantiation: estimator(startingPoint, initialFrame, predicate) where
  // (startingPoint, initialFrame) describes the initial tetrahedron.
  Point o(0, 0, 0);
  std::array<Point, 3> m = { Point(1, 0, 0), Point(0, 1, 0), Point(0, 0, 1) };
  Estimator estimator(o, m, plane);
 
  int it = 0;
  while (estimator.advance().first) {
      it++;
 
      // You can examine the current configuration of the H-neighborhood, using PlaneProbingTetrahedronEstimator::hexagonState
      auto state = estimator.hexagonState();
      if (state == Estimator::Neighborhood::HexagonState::Planar) {
          std::cout << "Planar" << std::endl;
      } else if (state == Estimator::Neighborhood::HexagonState::Empty) {
          std::cout << "Empty" << std::endl;
      } else if (state == Estimator::Neighborhood::HexagonState::NonPlanar) {
          std::cout << "NonPlanar" << std::endl;
      } else if (state == Estimator::Neighborhood::HexagonState::NonConvex) {
          std::cout << "NonConvex" << std::endl;
      }
 
      // Here, we display the current frame (the vectors m_k) and the current estimation
      std::clog << "it = " << it << " "
          << estimator.m(0) << " " << estimator.m(1) << " " << estimator.m(2) << " "
          << estimator.getNormal() << std::endl;
  }
 
  // This loop can also be reduced to:
  // Point n = estimator.compute()
 
  ASSERT(estimator.getNormal() == n);
 
  return 0;
}
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