subscibe from Model state in Gazebo

asked 2012-03-06 02:53:06 -0600

hmmm
31 ●18 ●19 ●23

updated 2012-03-06 05:57:13 -0600

how can i subscribe to /gazebo/model_states ? Sorry, i am a beginner an did not understand it, yet.I read the tutorial but it does not help me.I want to get the x,y and z Position of my model. For beginning i write this.But how to go on ?

ros::Subscriber xyz_subscriber_;

void ModelStatecallback(const gazebo_msgs::ModelStates::ConstPtr& msg)
{


}

xyz_subscriber_ = node_handle_.subscribe</gazebo/model_states>("currentposition", 1, ModelStatecallback);

};

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answered 2012-03-06 05:51:00 -0600

DimitriProsser

11163 ●79 ●116 ●169

updated 2012-03-06 05:51:20 -0600

You should have a look at the tutorials here.

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hi, i read that tutorial, but i dont understand,wheter the topicname is a standard name or just free created?it would be very helpful to understand this stuff ,by explaning me at this special example.

hmmm ( 2012-03-06 08:37:32 -0600 )edit

The topic names are set by the nodes that host those topics. Gazebo defines its own topic names, and you must subscribe to them. If you look in the documentation for any node, it lists the services and topics that it hosts and how to use them.

DimitriProsser ( 2012-03-06 08:58:52 -0600 )edit

link is broken now.

malharjajoo ( 2018-04-09 13:33:31 -0600 )edit

Here is the correct link: https://wiki.ros.org/ROS/Tutorials/Wr...

Dayo ( 2021-04-27 19:35:17 -0600 )edit

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answered 2012-03-22 15:55:50 -0600

hsu
5735 ●31 ●62 ●89

Hi, the topic you need to subscribe to is listed here. In this case, you probably want to do something like below:

xyz_subscriber_ = node_handle_.subscribe("/gazebo/model_states", 10, ModelStatecallback);

hope this helps.

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answered 2012-03-06 20:08:24 -0600

hmmm
31 ●18 ●19 ●23

updated 2012-03-06 20:10:01 -0600

Is this the write way? i cant find the mistake.Can anyone please help me , especially at this example?

ros::NodeHandle node_handle_; ros::Subscriber xyz_subscriber_;

xyz_subscriber_ = node_handle_.subscribe("ModelStates", 10, ModelStatecallback);

void ModelStatecallback(const gazebo_msgs::ModelStates::ConstPtr& msg) { double actual_value_x=msg.pose[0].position.x; double actual_value_y=msg.pose[0].position.y; double actual_value_z=msg.pose[0].position.z; }

int main(int argc, char **argv) { ros::init(argc, argv, "positioncontrol");

ros::spin();

return 0; }

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Please don't use answers to continue a conversation. Instead, please edit your original question to add more information, if necessary. Thanks for keeping answers.ros.org organized.

mjcarroll ( 2012-03-07 01:14:50 -0600 )edit

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subscibe from Model state in Gazebo

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