本文整理汇总了C++中ros::ServiceClient::isValid方法的典型用法代码示例。如果您正苦于以下问题：C++ ServiceClient::isValid方法的具体用法？C++ ServiceClient::isValid怎么用？C++ ServiceClient::isValid使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类ros::ServiceClient的用法示例。
在下文中一共展示了ServiceClient::isValid方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: main
int main(int argc, char **argv)
{
ros::init(argc, argv, "pendulum_controller");
//ros::init(argc, argv, "pendulum");
ros::NodeHandle n("pendulum");
ros::NodeHandle n_state("pendulum");
command_pub = n.advertise<pendulum::command>( "command", 1000 );
state_client = n_state.serviceClient<pendulum::state>( "state" );
//state_client = n.serviceClient<pendulum::state>( "state" );
//state_client = n.serviceClient<pendulum::state>( "state", true );
if( !state_client.isValid( ) ) {
ROS_INFO( "state_client not valid" );
state_client.waitForExistence( );
}
ros::Rate loop_rate( 25 );
//ros::Rate loop_rate( 10 );
ROS_INFO("Ready to standup pendulum.");
command.time = 0.0;
command.torque = 0.0;
state.request.timestamp = 0.0;
pendulum::state s;
if( !state_client.isValid( ) ) {
ROS_INFO( "state_client no longer valid" );
state_client.waitForExistence( );
}
int count = 0;
ros::Time calibrate_time, start_time;
while( ros::ok( ) ) {
calibrate_time = ros::Time::now( );
if( calibrate_time.sec != 0 || calibrate_time.nsec != 0 )
break;
ros::spinOnce( );
}
start_time = ros::Time::now( );
//ROS_INFO( "start_time: sec[%u] nsec[%u]", start_time.sec, start_time.nsec );
ROS_INFO( "time, position, velocity, torque" );
while( ros::ok( ) ) {
//if( count == 1 ) break;
if( state_client && state_client.exists( ) && state_client.isValid( ) ) {
//ROS_INFO("Calling service");
if( state_client.call( s ) ) {
//ROS_INFO("Successful call");
ros::Time sim_time = ros::Time::now( );
//ROS_INFO( "sim_time: sec[%u] nsec[%u]", sim_time.sec, sim_time.nsec );
//ros::Duration current_time = sim_time - start_time;
//Real time = (Real) count / 1000.0;
Real time = (sim_time - start_time).toSec();
command.torque = control( time, s.response.position, s.response.velocity );
command.time = time;
ROS_INFO( "%10.9f, %10.9f, %10.9f, %10.9f", time, s.response.position, s.response.velocity, command.torque );
command_pub.publish( command );
//command.torque = control( state.response.time, state.response.position, state.response.velocity );
//command.time = state.response.time;
} else {
ROS_INFO("Failed to call");
}
} else {
ROS_INFO("Persistent client is invalid");
}
/*
if( !state_client.isValid( ) ) {
ROS_INFO( "state_client not valid" );
}
if( !state_client.exists( ) )
state_client.waitForExistence( );
if( state_client.call( s ) ) {
//if( state_client.call( state ) ) {
ROS_INFO( "called state" );
command.torque = control( s.response.time, s.response.position, s.response.velocity );
command.time = s.response.time;
//command.torque = control( state.response.time, state.response.position, state.response.velocity );
//command.time = state.response.time;
//.........这里部分代码省略.........