warp_point_rigid_6d.h

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#pragma once
 
#include <pcl/registration/warp_point_rigid.h>
 
namespace pcl {
namespace registration {
/** \brief @b WarpPointRigid3D enables 6D (3D rotation + 3D translation)
 * transformations for points.
 *
 * \note The class is templated on the source and target point types as well as on the
 * output scalar of the transformation matrix (i.e., float or double). Default: float.
 * \author Radu B. Rusu
 * \ingroup registration
 */
template <typename PointSourceT, typename PointTargetT, typename Scalar = float>
class WarpPointRigid6D : public WarpPointRigid<PointSourceT, PointTargetT, Scalar> {
public:
  using WarpPointRigid<PointSourceT, PointTargetT, Scalar>::transform_matrix_;
 
  using Matrix4 = typename WarpPointRigid<PointSourceT, PointTargetT, Scalar>::Matrix4;
  using VectorX = typename WarpPointRigid<PointSourceT, PointTargetT, Scalar>::VectorX;
 
  using Ptr = shared_ptr<WarpPointRigid6D<PointSourceT, PointTargetT, Scalar>>;
  using ConstPtr =
      shared_ptr<const WarpPointRigid6D<PointSourceT, PointTargetT, Scalar>>;
 
  WarpPointRigid6D() : WarpPointRigid<PointSourceT, PointTargetT, Scalar>(6) {}
 
  /** \brief Empty destructor */
  ~WarpPointRigid6D() {}
 
  /** \brief Set warp parameters.
   * \note Assumes the quaternion parameters are normalized.
   * \param[in] p warp parameters (tx ty tz qx qy qz)
   */
  void
  setParam(const VectorX& p) override
  {
    assert(p.rows() == this->getDimension());
 
    // Copy the rotation and translation components
    transform_matrix_.setZero();
    transform_matrix_(0, 3) = p[0];
    transform_matrix_(1, 3) = p[1];
    transform_matrix_(2, 3) = p[2];
    transform_matrix_(3, 3) = 1;
 
    // Compute w from the unit quaternion
    Eigen::Quaternion<Scalar> q(0, p[3], p[4], p[5]);
    q.w() = static_cast<Scalar>(std::sqrt(1 - q.dot(q)));
    q.normalize();
    transform_matrix_.topLeftCorner(3, 3) = q.toRotationMatrix();
  }
};
} // namespace registration
} // namespace pcl