humotion

/*

* This file is part of humotion

*

* Copyright(c) sschulz <AT> techfak.uni-bielefeld.de

* http://opensource.cit-ec.de/projects/humotion

*

* This file may be licensed under the terms of the

* GNU Lesser General Public License Version 3 (the ``LGPL''),

* or (at your option) any later version.

*

* Software distributed under the License is distributed

* on an ``AS IS'' basis, WITHOUT WARRANTY OF ANY KIND, either

* express or implied. See the LGPL for the specific language

* governing rights and limitations.

*

* You should have received a copy of the LGPL along with this

* program. If not, go to http://www.gnu.org/licenses/lgpl.html

* or write to the Free Software Foundation, Inc.,

* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.

*

* The development of this software was supported by the

* Excellence Cluster EXC 277 Cognitive Interaction Technology.

* The Excellence Cluster EXC 277 is a grant of the Deutsche

* Forschungsgemeinschaft (DFG) in the context of the German

* Excellence Initiative.

*/

#include "server/controller.h"

#include "server/eye_motion_generator.h"

#include "server/eyelid_motion_generator.h"

#include "server/eyebrow_motion_generator.h"

#include "server/neck_motion_generator.h"

#include "server/mouth_motion_generator.h"

using namespace std;

using namespace humotion;

using namespace humotion::server;

//! constructor

Controller::Controller(JointInterface *j) : activated(false) {

    joint_interface = j;

}

//! destructor

Controller::~Controller(){

}

//! initialise motion generators

void Controller::init_motion_generators(){

    //NOTE: the order of these generators is important!

    //       (i.e. the neck generator must be added after the eye generator!)

    //1) eye motion generation:

    add_motion_generator(new EyeMotionGenerator(joint_interface));

    //2) eyelid motion generator

    add_motion_generator(new EyelidMotionGenerator(joint_interface));

    //3) neck motion generator

    add_motion_generator(new NeckMotionGenerator(joint_interface));

    //4) mouth motion generator

    add_motion_generator(new MouthMotionGenerator(joint_interface));

    //5) eyebrow motion generator

    add_motion_generator(new EyebrowMotionGenerator(joint_interface));

}

//! add a single motion genrator

void Controller::add_motion_generator(MotionGenerator *m){

    motion_generator_vector.push_back(m);

}

//! calculate target angles for all motion generators:

void Controller::calculate_targets(){

    for(motion_generator_vector_t::iterator it = motion_generator_vector.begin(); it<motion_generator_vector.end(); it++){

        (*it)->calculate_targets();

    }

}

//! publish all target angles to the devices:

//! NOTE: this is done in an extra loop to have a low delay between consequent sets:

void Controller::publish_targets(){

    for(motion_generator_vector_t::iterator it = motion_generator_vector.begin(); it<motion_generator_vector.end(); it++){

        (*it)->publish_targets();

    }

}

GazeState Controller::relative_gaze_to_absolute_gaze(GazeState relative){

    GazeState absolute_gaze = relative;

    //incoming gaze state wants to set a relative gaze angle

    //in order to calc the new absolute gaze, we need to go back

    //in time and find out where the head was pointing at that specific time:

    double relative_target_timestamp = relative.timestamp;

    //fetch head / camera pose during that timestamp:

    double neck_pan  = joint_interface->get_ts_position(JointInterface::ID_NECK_PAN).get_interpolated_value(relative_target_timestamp);

    double eye_l_pan = joint_interface->get_ts_position(JointInterface::ID_EYES_LEFT_LR).get_interpolated_value(relative_target_timestamp);

    double eye_r_pan = joint_interface->get_ts_position(JointInterface::ID_EYES_RIGHT_LR).get_interpolated_value(relative_target_timestamp);

    double pan       = neck_pan + (eye_l_pan + eye_r_pan)/2.0;

    //

    double neck_tilt = joint_interface->get_ts_position(JointInterface::ID_NECK_TILT).get_interpolated_value(relative_target_timestamp);

    double eye_tilt  = joint_interface->get_ts_position(JointInterface::ID_EYES_BOTH_UD).get_interpolated_value(relative_target_timestamp);

    double tilt      = neck_tilt + eye_tilt;

    //

    double roll      = joint_interface->get_ts_position(JointInterface::ID_NECK_ROLL).get_interpolated_value(relative_target_timestamp);

    //build up absolute target:

    absolute_gaze.type  = GazeState::ABSOLUTE;

    absolute_gaze.pan   = pan + relative.pan;

    absolute_gaze.tilt  = tilt + relative.tilt;

    absolute_gaze.roll  = roll + relative.roll;

    //FIXME: use ros TF for that calculation...

    //see http://wiki.ros.org/tf/Tutorials/Time%20travel%20with%20tf%20%28C%2B%2B%29

    //ros::Time past = now - ros::Duration(5.0);

    //listener.waitForTransform("/turtle2", now,J "/turtle1", past, "/world", ros::Duration(1.0));

    //listener.lookupTransform("/turtle2", now, "/turtle1", past, "/world", transform);

    return absolute_gaze;

}

//! activate controller

void Controller::set_activated(void){

    activated = true;

}

//! update gaze target:

//! \param GazeState with target values for the overall gaze

void Controller::set_gaze_target(GazeState new_gaze_target){

    if (!activated){

        //not yet initialized, ignore incoming targets

        return;

    }

    GazeState target_gaze;

    //relative or absolute gaze update?

    if (new_gaze_target.type == GazeState::RELATIVE){

        //relative gaze target -> calculate target angles

        target_gaze = relative_gaze_to_absolute_gaze(new_gaze_target);

    }else{

        //already absolute gaze, set this

        target_gaze = new_gaze_target;

    }

    for(motion_generator_vector_t::iterator it = motion_generator_vector.begin(); it<motion_generator_vector.end(); it++){

        (*it)->set_gaze_target(target_gaze);

    }

}

//! update mouth state:

//! \param MouthState with target values for the mouth joints

void Controller::set_mouth_target(MouthState s){

    if (!activated){

        //not yet initialized, ignore incoming targets

        return;

    }

    for(motion_generator_vector_t::iterator it = motion_generator_vector.begin(); it<motion_generator_vector.end(); it++){

        (*it)->set_mouth_target(s);

    }

}