collision_mesh_mesh_unit.hpp

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#ifndef TESSERACT_COLLISION_COLLISION_MESH_MESH_UNIT_HPP
#define TESSERACT_COLLISION_COLLISION_MESH_MESH_UNIT_HPP
 
#include <tesseract_collision/core/discrete_contact_manager.h>
#include <tesseract_collision/core/common.h>
#include <tesseract_geometry/geometries.h>
 
namespace tesseract_collision::test_suite
{
namespace detail
{
inline void addCollisionObjects(DiscreteContactManager& checker)
{
  // Add sphere to checker
  tesseract_geometry::Mesh::Ptr sphere;
 
  auto vertices = std::make_shared<tesseract_common::VectorVector3d>();
  auto faces = std::make_shared<Eigen::VectorXi>();
  int num_faces =
      loadSimplePlyFile(std::string(TESSERACT_SUPPORT_DIR) + "/meshes/sphere_p25m.ply", *vertices, *faces, true);
  EXPECT_GT(num_faces, 0);
 
  sphere = std::make_shared<tesseract_geometry::Mesh>(vertices, faces);
  EXPECT_TRUE(num_faces == sphere->getFaceCount());
 
  Eigen::Isometry3d sphere_pose;
  sphere_pose.setIdentity();
 
  CollisionShapesConst obj1_shapes;
  tesseract_common::VectorIsometry3d obj1_poses;
  obj1_shapes.push_back(sphere);
  obj1_poses.push_back(sphere_pose);
 
  checker.addCollisionObject("sphere_link", 0, obj1_shapes, obj1_poses, false);
  checker.enableCollisionObject("sphere_link");
 
  // Add thin box to checker which is disabled
  CollisionShapePtr thin_box = std::make_shared<tesseract_geometry::Box>(0.1, 1, 1);
  Eigen::Isometry3d thin_box_pose;
  thin_box_pose.setIdentity();
 
  CollisionShapesConst obj2_shapes;
  tesseract_common::VectorIsometry3d obj2_poses;
  obj2_shapes.push_back(thin_box);
  obj2_poses.push_back(thin_box_pose);
 
  checker.addCollisionObject("thin_box_link", 0, obj2_shapes, obj2_poses);
  checker.disableCollisionObject("thin_box_link");
 
  // Add second sphere to checker. If use_convex_mesh = true
  // then this sphere will be added as a convex hull mesh.
  CollisionShapePtr sphere1 = std::make_shared<tesseract_geometry::Mesh>(vertices, faces);
  Eigen::Isometry3d sphere1_pose;
  sphere1_pose.setIdentity();
 
  CollisionShapesConst obj3_shapes;
  tesseract_common::VectorIsometry3d obj3_poses;
  obj3_shapes.push_back(sphere1);
  obj3_poses.push_back(sphere1_pose);
 
  checker.addCollisionObject("sphere1_link", 0, obj3_shapes, obj3_poses);
 
  // Add box and remove
  CollisionShapePtr remove_box = std::make_shared<tesseract_geometry::Box>(0.1, 1, 1);
  Eigen::Isometry3d remove_box_pose;
  thin_box_pose.setIdentity();
 
  CollisionShapesConst obj4_shapes;
  tesseract_common::VectorIsometry3d obj4_poses;
  obj4_shapes.push_back(remove_box);
  obj4_poses.push_back(remove_box_pose);
 
  checker.addCollisionObject("remove_box_link", 0, obj4_shapes, obj4_poses);
  EXPECT_TRUE(checker.getCollisionObjects().size() == 4);
  EXPECT_TRUE(checker.hasCollisionObject("remove_box_link"));
  checker.removeCollisionObject("remove_box_link");
  EXPECT_FALSE(checker.hasCollisionObject("remove_box_link"));
 
  // Try functions on a link that does not exist
  EXPECT_FALSE(checker.removeCollisionObject("link_does_not_exist"));
  EXPECT_FALSE(checker.enableCollisionObject("link_does_not_exist"));
  EXPECT_FALSE(checker.disableCollisionObject("link_does_not_exist"));
 
  // Try to add empty Collision Object
  EXPECT_FALSE(
      checker.addCollisionObject("empty_link", 0, CollisionShapesConst(), tesseract_common::VectorIsometry3d()));
 
  // Check sizes
  EXPECT_TRUE(checker.getCollisionObjects().size() == 3);
  for (const auto& co : checker.getCollisionObjects())
  {
    EXPECT_TRUE(checker.getCollisionObjectGeometries(co).size() == 1);
    EXPECT_TRUE(checker.getCollisionObjectGeometriesTransforms(co).size() == 1);
    for (const auto& cgt : checker.getCollisionObjectGeometriesTransforms(co))
    {
      EXPECT_TRUE(cgt.isApprox(Eigen::Isometry3d::Identity(), 1e-5));
    }
  }
}
}  // namespace detail
 
inline void runTest(DiscreteContactManager& checker)
{
  // Add collision objects
  detail::addCollisionObjects(checker);
 
  // Call it again to test adding same object
  detail::addCollisionObjects(checker);
 
  // Test when object is in collision (Closest Feature Edge to Edge)
  std::vector<std::string> active_links{ "sphere_link", "sphere1_link" };
  checker.setActiveCollisionObjects(active_links);
  std::vector<std::string> check_active_links = checker.getActiveCollisionObjects();
  EXPECT_TRUE(tesseract_common::isIdentical<std::string>(active_links, check_active_links, false));
 
  EXPECT_TRUE(checker.getIsContactAllowedFn() == nullptr);
 
  checker.setDefaultCollisionMarginData(0);
  EXPECT_NEAR(checker.getCollisionMarginData().getMaxCollisionMargin(), 0.0, 1e-5);
 
  // Test when object is inside another
  tesseract_common::TransformMap location;
  location["sphere_link"] = Eigen::Isometry3d::Identity();
  location["sphere1_link"] = Eigen::Isometry3d::Identity();
  location["sphere1_link"].translation()(0) = 0.2;
  checker.setCollisionObjectsTransform(location);
 
  // Perform collision check
  ContactResultMap result;
  checker.contactTest(result, ContactRequest(ContactTestType::ALL));
 
  ContactResultVector result_vector;
  result.flattenMoveResults(result_vector);
 
  EXPECT_TRUE(result_vector.size() >= 37);
 
  // Test object is out side the contact distance
  location["sphere1_link"].translation() = Eigen::Vector3d(1, 0, 0);
  result.clear();
  result_vector.clear();
  checker.setCollisionObjectsTransform(location);
 
  checker.contactTest(result, ContactRequest(ContactTestType::ALL));
  result.flattenCopyResults(result_vector);
 
  EXPECT_TRUE(result_vector.empty());
 
  // Test object inside the contact distance (Closest Feature Edge to Edge)
  result.clear();
  result_vector.clear();
 
  checker.setCollisionMarginData(CollisionMarginData(0.55));
  EXPECT_NEAR(checker.getCollisionMarginData().getMaxCollisionMargin(), 0.55, 1e-5);
  checker.contactTest(result, ContactRequest(ContactTestType::CLOSEST));
  result.flattenMoveResults(result_vector);
 
  EXPECT_TRUE(!result_vector.empty());
  EXPECT_NEAR(result_vector[0].distance, 0.52448, 0.001);
 
  std::vector<int> idx = { 0, 1, 1 };
  if (result_vector[0].link_names[0] != "sphere_link")
    idx = { 1, 0, -1 };
 
  EXPECT_NEAR(result_vector[0].nearest_points[static_cast<size_t>(idx[0])][0], 0.23776, 0.001);
  EXPECT_NEAR(result_vector[0].nearest_points[static_cast<size_t>(idx[1])][0], 0.76224, 0.001);
  EXPECT_NEAR(result_vector[0].nearest_points[0][1], result_vector[0].nearest_points[1][1], 0.001);
  EXPECT_NEAR(result_vector[0].nearest_points[0][2], result_vector[0].nearest_points[1][2], 0.001);
  EXPECT_GT((idx[2] * result_vector[0].normal).dot(Eigen::Vector3d(1, 0, 0)), 0.0);
  EXPECT_LT(std::abs(std::acos((idx[2] * result_vector[0].normal).dot(Eigen::Vector3d(1, 0, 0)))), 0.00001);
 
  // Test object inside the contact distance (Closest Feature Vertex to Vertex)
  location["sphere1_link"].translation() = Eigen::Vector3d(0, 1, 0);
  result.clear();
  result_vector.clear();
 
  // The closest feature of the mesh should be edge to edge
  // Use different method for setting transforms
  checker.setCollisionObjectsTransform("sphere1_link", location["sphere1_link"]);
  checker.setCollisionMarginData(CollisionMarginData(0.55));
  EXPECT_NEAR(checker.getCollisionMarginData().getMaxCollisionMargin(), 0.55, 1e-5);
  checker.contactTest(result, ContactRequest(ContactTestType::CLOSEST));
  result.flattenCopyResults(result_vector);
 
  EXPECT_TRUE(!result_vector.empty());
  EXPECT_NEAR(result_vector[0].distance, 0.5, 0.001);
 
  idx = { 0, 1, 1 };
  if (result_vector[0].link_names[0] != "sphere_link")
    idx = { 1, 0, -1 };
 
  EXPECT_NEAR(result_vector[0].nearest_points[static_cast<size_t>(idx[0])][1], 0.25, 0.001);
  EXPECT_NEAR(result_vector[0].nearest_points[static_cast<size_t>(idx[1])][1], 0.75, 0.001);
  EXPECT_NEAR(result_vector[0].nearest_points[0][0], result_vector[0].nearest_points[1][0], 0.001);
  EXPECT_NEAR(result_vector[0].nearest_points[0][2], result_vector[0].nearest_points[1][2], 0.001);
  EXPECT_GT((idx[2] * result_vector[0].normal).dot(Eigen::Vector3d(0, 1, 0)), 0.0);
  EXPECT_LT(std::abs(std::acos((idx[2] * result_vector[0].normal).dot(Eigen::Vector3d(0, 1, 0)))), 0.00001);
}
}  // namespace tesseract_collision::test_suite
#endif  // TESSERACT_COLLISION_COLLISION_MESH_MESH_UNIT_HPP