Updated the coordinate system in /spawn service for consistency

asked 2018-08-16 05:07:02 -0500

v.leto gravatar image

updated 2018-08-16 13:32:35 -0500

jayess gravatar image

Hi! I try to call the spawn service but the turtles appear in different positions from the ones entered. How can I do to solve this problem?thanks

Update:

my launch file is this

<?xml version= "1.0"?> 
<launch>
<!-- definisce un parametro nTurtle di valore 3-->
<param name="nTurtle" value="3" />//parametro comune???
<!-- avvia il simulatore turtlesim con una tartaruga di default-->
<node pkg="turtlesim" type="turtlesim_node" name="simulator" />
<!--si va ad avviare quella che sarà la nostra prima tartaruga-->
<node pkg="consensus" type="consensus_node" args="myturtle1 3 3 1" name="turtlenode1" launch-prefix="xterm -geometry 120x31+10+10 -e "/>
<!-- si richiama un nodo che va ad uccidere la tartaruga di default -->
<node pkg="consensus" type="kill_turtle" name="kill_turtle" />
<!-- le altre nostre due tartarughe-->
<node pkg="consensus" type="consensus_node" args="myturtle2 9 8 1" name="turtlenode2" launch-prefix="xterm -geometry 120x31+210+110 -e "/>
<node pkg="consensus" type="consensus_node" args="myturtle3 3 8 1" name="turtlenode3" launch-prefix="xterm -geometry 120x31+410+210 -e "/>
</launch>

but one of them is spawned at 9 3 instead of 9 8

Comments from deleted answer

  • Q. And are the other two turtles correctly spawned ? A. yes..I think that there is a rotation
  • Q. Ans have you try launching all the nodes separately ? A. no I haven't
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Comments

What do you mean by different positions from the one entered ? What nodes are you lauching ? Maybe you are using a map that have an offset on the origin coordinates (you can check it with rostopic echo /map) and substract those coordinates to the ones you find to retrieve the ones entered.

Delb gravatar image Delb  ( 2018-08-16 06:33:56 -0500 )edit
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