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How to properly use get_sensor?

asked 2017-01-16 03:37:56 -0600

Robot_sim_person gravatar image


I have some code which uses get_sensor to get a laser sensor, however when I want to use two of this model, they get muddled up as I can't reference the full model name.

sensors::SensorPtr model_sensor;

model_sensor = sensors::get_sensor("laser"); // this is fine when there's only one laser sensor

I want to get something like:

model_sensor = sensors::get_sensor("my_model::hoyoko::link::laser"); but I'm confident this is wrong as gazebo crashes with this new code.

I have the get_sensor refference : http://osrf-distributions.s3.amazonaw... (Ctrl f "get_sensor" to find the relevant part)

But I don't fully understand what they mean by " This name should be fully scoped. This means _name = world_name::model_name::link_name::sensor_name."

Any help would be much appreciated, thanks!

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answered 2017-01-17 08:39:39 -0600

Robot_sim_person gravatar image

It turns out you can either use just the sensor_name for the string, or the whole thing. But nothing in between (i.e. "model_name::link_name::sensor_name" is not acceptable.

An easy way to get an example of this is to print GetScopedName() on the terminal ( "model_sensor->GetScopedName()" ) .

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Thanks for posting your solution. I'm curious, what do you mean by "the whole thing" if it's not the scoped name? Maybe this is a bug in Gazebo, it shouldn't crash with a bad string.

chapulina gravatar imagechapulina ( 2017-01-17 12:19:51 -0600 )edit

If I try to find the sensor without the world name, i.e: sensorLocation = /*"default::" +*/ this->model->GetName() + "::hokuyo::link::laser"; the get_sensor function will crash. But it will work fine if I either include all the names, or just the sensor name. The whole thing is: sensorLocation = "default::" + this->model->GetName() + "::hokuyo::link::laser"; Just the sensor name is: sensorLocation = "laser";

Robot_sim_person gravatar imageRobot_sim_person ( 2017-01-18 04:19:19 -0600 )edit

Thanks for the clarification

chapulina gravatar imagechapulina ( 2017-01-18 11:03:22 -0600 )edit
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Asked: 2017-01-16 03:37:56 -0600

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Last updated: Jan 17 '17