Example #1
0
  void stampedTFDifferenceStampedTF(tf::StampedTransform &tf1,
                                    tf::StampedTransform &tf2,
                                    tf::StampedTransform &tfResult)
  {
    tfResult.setData(tf1.inverseTimes(tf2));

  }
Example #2
0
 void poseStampedToStampedTF(geometry_msgs::PoseStamped &msg, tf::StampedTransform &stampedTF, std::string child)
 {
   tf::Transform btTrans;
   stampedTF.stamp_ = msg.header.stamp;
   stampedTF.frame_id_ = msg.header.frame_id;
   stampedTF.child_frame_id_ = child;
   
   tf::poseMsgToTF(msg.pose, btTrans);
   stampedTF.setData(btTrans);
 }
Example #3
0
bool OdomTf::multiply_stamped_tfs(tf::StampedTransform A_stf,
        tf::StampedTransform B_stf, tf::StampedTransform &C_stf) {

    //long-winded approach:
    //std::string str1(A_stf.child_frame_id_); //want to compare strings to check consistency
    //std::string str2(B_stf.frame_id_);
    //if (str1.compare(str2) != 0) { //SHOULD get that child frame of A is parent frame of B
    //more compact approach:
    if (A_stf.child_frame_id_.compare(B_stf.frame_id_) != 0) {    
        std::cout << "can't multiply transforms; mismatched frames" << endl;
	std::cout << A_stf.child_frame_id_ << " is not " << B_stf.frame_id_ << '\n';
        return false;
    }
    //if here, the named frames are logically consistent
        tf::Transform C = A_stf*B_stf; //multiplication is defined for transforms
	C_stf.setData(C);
	C_stf.frame_id_ = A_stf.frame_id_;
	C_stf.child_frame_id_ = B_stf.child_frame_id_;
	C_stf.stamp_ = ros::Time::now();
 
    //long-winded approach, equivalent to above:
    /*
    tf::Transform A, B; //simple transforms--not stamped
        
    A = get_tf_from_stamped_tf(A_stf); // get the transform from the stamped transform
    B = get_tf_from_stamped_tf(B_stf);
    C = A*B; //multiplication is defined for transforms 
    C_stf.frame_id_ = A_stf.frame_id_; //assign appropriate parent and child frames to result
    C_stf.child_frame_id_ = B_stf.child_frame_id_;
    C_stf.setOrigin(C.getOrigin()); //populate the origin and orientation of the result
    C_stf.setBasis(C.getBasis());
    C_stf.stamp_ = ros::Time::now(); //assign the time stamp to current time; 
     * */
    // alternatively, could assign this to the OLDER of A or B transforms
    return true; //if got here, the multiplication is valid
}