/*
 * Copyright (C) 2020 Open Source Robotics Foundation
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
*/

syntax = "proto3";
package gz.msgs;
option java_package = "com.gz.msgs";
option java_outer_classname = "JointTrajectoryPointProtos";

/// \ingroup gz.msgs
/// \interface JointTrajectoryPoint
/// \brief Message that specifies the desired state of all single-axis joints
/// at a specific trajectory point. All values for each joint must be ordered
/// according to the joint names provided in JointTrajectory message

import "gz/msgs/duration.proto";

message JointTrajectoryPoint
{
  /// \brief Position of each joint relative to their "0" position. Units are
  /// dependent on the joint type, where radians are used for revolute or
  /// continuous joints, and meters for prismatic joints
  repeated double positions     = 1;

  /// \brief Rate of change in position of each joint. Units are dependent on
  /// the joint type, where radians/second are used for revolute or continuous
  /// joints, and meters/second for prismatic joints
  repeated double velocities    = 2;

  /// \brief Rate of change in velocity of each joint. Units are dependent on
  /// the joint type, where radians/second^2 are used for revolute or
  /// continuous joints, and meters/second^2 for prismatic joints
  repeated double accelerations = 3;

  /// \brief Torque or force applied at each joint. Units are dependent on the
  /// joint type, where newton-meters are used for revolute or continuous
  /// joints (torque), and newtons for prismatic joints (force)
  repeated double effort        = 4;

  /// \brief Desired time from the beginning of trajectory execution until
  /// this trajectory point should be reached. This value must be strictly
  /// increasing for consecutive points
  Duration time_from_start      = 5;
}