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Diffstat (limited to 'src/platforms/ros/nodes/attitude_estimator/attitude_estimator.cpp')
| -rw-r--r-- | src/platforms/ros/nodes/attitude_estimator/attitude_estimator.cpp | 154 |
1 files changed, 154 insertions, 0 deletions
diff --git a/src/platforms/ros/nodes/attitude_estimator/attitude_estimator.cpp b/src/platforms/ros/nodes/attitude_estimator/attitude_estimator.cpp new file mode 100644 index 000000000..a3e4bca30 --- /dev/null +++ b/src/platforms/ros/nodes/attitude_estimator/attitude_estimator.cpp @@ -0,0 +1,154 @@ +/**************************************************************************** + * + * Copyright (c) 2014 PX4 Development Team. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * 3. Neither the name PX4 nor the names of its contributors may be + * used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + ****************************************************************************/ + +/** + * @file att_estimator.cpp + * + * @author Thomas Gubler <thomasgubler@gmail.com> + * @author Roman Bapst <romanbapst@yahoo.de> +*/ + +#include "attitude_estimator.h" + +#include <px4/vehicle_attitude.h> +#include <mathlib/mathlib.h> +#include <platforms/px4_defines.h> +#include <platforms/px4_middleware.h> + +AttitudeEstimator::AttitudeEstimator() : + _n(), + // _sub_modelstates(_n.subscribe("/gazebo/model_states", 1, &AttitudeEstimator::ModelStatesCallback, this)), + _vehicle_attitude_pub(_n.advertise<px4::vehicle_attitude>("vehicle_attitude", 1)) +{ + std::string vehicle_model; + _n.param("vehicle_model", vehicle_model, std::string("iris")); + _sub_imu = _n.subscribe("/" + vehicle_model + "/imu", 1, &AttitudeEstimator::ImuCallback, this); +} + +void AttitudeEstimator::ModelStatesCallback(const gazebo_msgs::ModelStatesConstPtr &msg) +{ + px4::vehicle_attitude msg_v_att; + + /* Fill px4 attitude topic with contents from modelstates topic */ + + /* Convert quaternion to rotation matrix */ + math::Quaternion quat; + //XXX: search for ardrone or other (other than 'plane') vehicle here + int index = 1; + quat(0) = (float)msg->pose[index].orientation.w; + quat(1) = (float)msg->pose[index].orientation.x; + quat(2) = (float) - msg->pose[index].orientation.y; + quat(3) = (float) - msg->pose[index].orientation.z; + + msg_v_att.q[0] = quat(0); + msg_v_att.q[1] = quat(1); + msg_v_att.q[2] = quat(2); + msg_v_att.q[3] = quat(3); + + math::Matrix<3, 3> rot = quat.to_dcm(); + + for (int i = 0; i < 3; i++) { + for (int j = 0; j < 3; j++) { + PX4_R(msg_v_att.R, i, j) = rot(i, j); + } + } + + msg_v_att.R_valid = true; + + math::Vector<3> euler = rot.to_euler(); + msg_v_att.roll = euler(0); + msg_v_att.pitch = euler(1); + msg_v_att.yaw = euler(2); + + //XXX this is in inertial frame + // msg_v_att.rollspeed = (float)msg->twist[index].angular.x; + // msg_v_att.pitchspeed = -(float)msg->twist[index].angular.y; + // msg_v_att.yawspeed = -(float)msg->twist[index].angular.z; + + msg_v_att.timestamp = px4::get_time_micros(); + _vehicle_attitude_pub.publish(msg_v_att); +} + +void AttitudeEstimator::ImuCallback(const sensor_msgs::ImuConstPtr &msg) +{ + px4::vehicle_attitude msg_v_att; + + /* Fill px4 attitude topic with contents from modelstates topic */ + + /* Convert quaternion to rotation matrix */ + math::Quaternion quat; + //XXX: search for ardrone or other (other than 'plane') vehicle here + int index = 1; + quat(0) = (float)msg->orientation.w; + quat(1) = (float)msg->orientation.x; + quat(2) = (float) - msg->orientation.y; + quat(3) = (float) - msg->orientation.z; + + msg_v_att.q[0] = quat(0); + msg_v_att.q[1] = quat(1); + msg_v_att.q[2] = quat(2); + msg_v_att.q[3] = quat(3); + + math::Matrix<3, 3> rot = quat.to_dcm(); + + for (int i = 0; i < 3; i++) { + for (int j = 0; j < 3; j++) { + PX4_R(msg_v_att.R, i, j) = rot(i, j); + } + } + + msg_v_att.R_valid = true; + + math::Vector<3> euler = rot.to_euler(); + msg_v_att.roll = euler(0); + msg_v_att.pitch = euler(1); + msg_v_att.yaw = euler(2); + + msg_v_att.rollspeed = (float)msg->angular_velocity.x; + msg_v_att.pitchspeed = -(float)msg->angular_velocity.y; + msg_v_att.yawspeed = -(float)msg->angular_velocity.z; + + msg_v_att.timestamp = px4::get_time_micros(); + _vehicle_attitude_pub.publish(msg_v_att); +} + + +int main(int argc, char **argv) +{ + ros::init(argc, argv, "attitude_estimator"); + AttitudeEstimator m; + + ros::spin(); + + return 0; +} |