ppovb5fc7/gazebo/plugins/events/EventSource.cc

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2019-03-25 11:01:43 +08:00
/*
* Copyright (C) 2014 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.
*
*/
#include "EventSource.hh"
using namespace gazebo;
// static data initialization
event::EventT<void (std::string, bool)> SimEventConnector::spawnModel;
////////////////////////////////////////////////////////////////////////////////
EventSource::~EventSource()
{
}
////////////////////////////////////////////////////////////////////////////////
EventSource::EventSource(transport::PublisherPtr _pub,
const std::string& _type,
physics::WorldPtr _world)
:type(_type), world(_world), active(true), pub(_pub)
{
GZ_ASSERT(_world, "EventSource world pointer is NULL");
GZ_ASSERT(_pub, "EventSource pub pointer is NULL");
}
////////////////////////////////////////////////////////////////////////////////
void EventSource::Init()
{
}
////////////////////////////////////////////////////////////////////////////////
void EventSource::Load(const sdf::ElementPtr _sdf)
{
this->name = _sdf->GetElement("name")->Get<std::string>();
// active by default, but this can be set in the world file
if (_sdf->HasElement("active"))
{
sdf::ElementPtr activeE = _sdf->GetElement("active");
this->active = activeE->Get<std::string>() == "true";
}
}
////////////////////////////////////////////////////////////////////////////////
void EventSource::Emit(const std::string &_data) const
{
if (this->IsActive())
{
// add event name, type and data as strings (data is JSON)
gazebo::msgs::SimEvent msg;
msg.set_type(this->type);
msg.set_name(this->name);
msg.set_data(_data);
// add world stats to give context to the event (mostly time & sim state)
gazebo::msgs::WorldStatistics *worldStatsMsg;
worldStatsMsg = msg.mutable_world_statistics();
worldStatsMsg->set_iterations(this->world->GetIterations());
worldStatsMsg->set_paused(this->world->IsPaused());
msgs::Set(worldStatsMsg->mutable_sim_time(), this->world->GetSimTime());
msgs::Set(worldStatsMsg->mutable_real_time(), this->world->GetRealTime());
msgs::Set(worldStatsMsg->mutable_pause_time(), this->world->GetPauseTime());
// send it on the publisher we got in the ctor
this->pub->Publish(msg);
}
}
///////////////////////////////////////////////////////////////////////////////
bool EventSource::IsActive() const
{
// inactive events do not fire.
return this->active;
}