gjk_convergence_criterion.cpp

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#include "hpp/fcl/data_types.h"
#include <boost/test/tools/old/interface.hpp>
#define BOOST_TEST_MODULE FCL_NESTEROV_GJK
#include <boost/test/included/unit_test.hpp>
 
#include <Eigen/Geometry>
#include <hpp/fcl/narrowphase/narrowphase.h>
#include <hpp/fcl/shape/geometric_shapes.h>
#include <hpp/fcl/internal/tools.h>
 
#include "utility.h"
 
using hpp::fcl::Box;
using hpp::fcl::FCL_REAL;
using hpp::fcl::GJKConvergenceCriterion;
using hpp::fcl::GJKConvergenceCriterionType;
using hpp::fcl::GJKSolver;
using hpp::fcl::ShapeBase;
using hpp::fcl::support_func_guess_t;
using hpp::fcl::Transform3f;
using hpp::fcl::Vec3f;
using hpp::fcl::details::GJK;
using hpp::fcl::details::MinkowskiDiff;
using std::size_t;
 
BOOST_AUTO_TEST_CASE(set_cv_criterion) {
  GJKSolver solver;
  GJK gjk(128, 1e-6);
 
  // Checking defaults
  BOOST_CHECK(solver.gjk_convergence_criterion == GJKConvergenceCriterion::VDB);
  BOOST_CHECK(solver.gjk_convergence_criterion_type ==
              GJKConvergenceCriterionType::Relative);
 
  BOOST_CHECK(gjk.convergence_criterion == GJKConvergenceCriterion::VDB);
  BOOST_CHECK(gjk.convergence_criterion_type ==
              GJKConvergenceCriterionType::Relative);
 
  // Checking set
  solver.gjk_convergence_criterion = GJKConvergenceCriterion::DualityGap;
  gjk.convergence_criterion = GJKConvergenceCriterion::DualityGap;
  solver.gjk_convergence_criterion_type = GJKConvergenceCriterionType::Absolute;
  gjk.convergence_criterion_type = GJKConvergenceCriterionType::Absolute;
 
  BOOST_CHECK(solver.gjk_convergence_criterion ==
              GJKConvergenceCriterion::DualityGap);
  BOOST_CHECK(solver.gjk_convergence_criterion_type ==
              GJKConvergenceCriterionType::Absolute);
 
  BOOST_CHECK(gjk.convergence_criterion == GJKConvergenceCriterion::DualityGap);
  BOOST_CHECK(gjk.convergence_criterion_type ==
              GJKConvergenceCriterionType::Absolute);
}
 
void test_gjk_cv_criterion(const ShapeBase& shape0, const ShapeBase& shape1,
                           const GJKConvergenceCriterionType cv_type) {
  // Solvers
  unsigned int max_iterations = 128;
  // by default GJK uses the VDB convergence criterion, which is relative.
  GJK gjk1(max_iterations, 1e-6);
 
  FCL_REAL tol;
  switch (cv_type) {
    // need to lower the tolerance when absolute
    case GJKConvergenceCriterionType::Absolute:
      tol = 1e-8;
      break;
    case GJKConvergenceCriterionType::Relative:
      tol = 1e-6;
      break;
    default:
      throw std::logic_error("Wrong convergence criterion type");
  }
 
  GJK gjk2(max_iterations, tol);
  gjk2.convergence_criterion = GJKConvergenceCriterion::DualityGap;
  gjk2.convergence_criterion_type = cv_type;
 
  GJK gjk3(max_iterations, tol);
  gjk3.convergence_criterion = GJKConvergenceCriterion::Hybrid;
  gjk3.convergence_criterion_type = cv_type;
 
  // Minkowski difference
  MinkowskiDiff mink_diff;
 
  // Generate random transforms
  size_t n = 1000;
  FCL_REAL extents[] = {-3., -3., 0, 3., 3., 3.};
  std::vector<Transform3f> transforms;
  generateRandomTransforms(extents, transforms, n);
  Transform3f identity = Transform3f::Identity();
 
  // Same init for both solvers
  Vec3f init_guess = Vec3f(1, 0, 0);
  support_func_guess_t init_support_guess;
  init_support_guess.setZero();
 
  // Run for 3 different cv criterions
  for (size_t i = 0; i < n; ++i) {
    mink_diff.set(&shape0, &shape1, identity, transforms[i]);
 
    GJK::Status res1 = gjk1.evaluate(mink_diff, init_guess, init_support_guess);
    BOOST_CHECK(gjk1.getIterations() <= max_iterations);
    Vec3f ray1 = gjk1.ray;
    res1 = gjk1.evaluate(mink_diff, init_guess, init_support_guess);
    BOOST_CHECK(res1 != GJK::Status::Failed);
    EIGEN_VECTOR_IS_APPROX(gjk1.ray, ray1, 1e-8);
 
    GJK::Status res2 = gjk2.evaluate(mink_diff, init_guess, init_support_guess);
    BOOST_CHECK(gjk2.getIterations() <= max_iterations);
    Vec3f ray2 = gjk2.ray;
    res2 = gjk2.evaluate(mink_diff, init_guess, init_support_guess);
    BOOST_CHECK(res2 != GJK::Status::Failed);
    EIGEN_VECTOR_IS_APPROX(gjk2.ray, ray2, 1e-8);
 
    GJK::Status res3 = gjk3.evaluate(mink_diff, init_guess, init_support_guess);
    BOOST_CHECK(gjk3.getIterations() <= max_iterations);
    Vec3f ray3 = gjk3.ray;
    res3 = gjk3.evaluate(mink_diff, init_guess, init_support_guess);
    BOOST_CHECK(res3 != GJK::Status::Failed);
    EIGEN_VECTOR_IS_APPROX(gjk3.ray, ray3, 1e-8);
 
    // check that solutions are close enough
    EIGEN_VECTOR_IS_APPROX(gjk1.ray, gjk2.ray, 1e-4);
    EIGEN_VECTOR_IS_APPROX(gjk1.ray, gjk3.ray, 1e-4);
  }
}
 
BOOST_AUTO_TEST_CASE(cv_criterion_same_solution) {
  Box box0 = Box(0.1, 0.2, 0.3);
  Box box1 = Box(1.1, 1.2, 1.3);
  test_gjk_cv_criterion(box0, box1, GJKConvergenceCriterionType::Absolute);
  test_gjk_cv_criterion(box0, box1, GJKConvergenceCriterionType::Relative);
}