link_model.cpp

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/* Author: Ioan Sucan */

#include <moveit/robot_model/link_model.h>
#include <moveit/robot_model/joint_model.h>
#include <geometric_shapes/shape_operations.h>
#include <moveit/robot_model/aabb.h>

namespace moveit
{
namespace core
{
LinkModel::LinkModel(const std::string& name)
  : name_(name)
  , parent_joint_model_(nullptr)
  , parent_link_model_(nullptr)
  , is_parent_joint_fixed_(false)
  , joint_origin_transform_is_identity_(true)
  , first_collision_body_transform_index_(-1)
  , link_index_(-1)
{
  joint_origin_transform_.setIdentity();
}

LinkModel::~LinkModel() = default;

void LinkModel::setJointOriginTransform(const Eigen::Affine3d& transform)
{
  joint_origin_transform_ = transform;
  joint_origin_transform_is_identity_ =
      joint_origin_transform_.linear().isIdentity() &&
      joint_origin_transform_.translation().norm() < std::numeric_limits<double>::epsilon();
}

void LinkModel::setParentJointModel(const JointModel* joint)
{
  parent_joint_model_ = joint;
  is_parent_joint_fixed_ = joint->getType() == JointModel::FIXED;
}

void LinkModel::setGeometry(const std::vector<shapes::ShapeConstPtr>& shapes, const EigenSTL::vector_Affine3d& origins)
{
  shapes_ = shapes;
  collision_origin_transform_ = origins;
  collision_origin_transform_is_identity_.resize(collision_origin_transform_.size());

  core::AABB aabb;

  for (std::size_t i = 0; i < shapes_.size(); ++i)
  {
    collision_origin_transform_is_identity_[i] =
        (collision_origin_transform_[i].linear().isIdentity() &&
         collision_origin_transform_[i].translation().norm() < std::numeric_limits<double>::epsilon()) ?
            1 :
            0;
    Eigen::Affine3d transform = collision_origin_transform_[i];

    if (shapes_[i]->type != shapes::MESH)
    {
      Eigen::Vector3d extents = shapes::computeShapeExtents(shapes_[i].get());
      aabb.extendWithTransformedBox(transform, extents);
    }
    else
    {
      // we cannot use shapes::computeShapeExtents() for meshes, since that method does not provide information about
      // the offset of the mesh origin
      const shapes::Mesh* mesh = dynamic_cast<const shapes::Mesh*>(shapes_[i].get());
      for (unsigned int j = 0; j < mesh->vertex_count; ++j)
      {
        aabb.extend(transform * Eigen::Map<Eigen::Vector3d>(&mesh->vertices[3 * j]));
      }
    }
  }

  centered_bounding_box_offset_ = aabb.center();
  if (shapes_.empty())
    shape_extents_.setZero();
  else
    shape_extents_ = aabb.sizes();
}

void LinkModel::setVisualMesh(const std::string& visual_mesh, const Eigen::Affine3d& origin,
                              const Eigen::Vector3d& scale)
{
  visual_mesh_filename_ = visual_mesh;
  visual_mesh_origin_ = origin;
  visual_mesh_scale_ = scale;
}

}  // end of namespace core
}  // end of namespace moveit