turtlesim is probably not the right choice, since it doesn't do any of the things you'd want -- collision detection, sensing, etc. turtlesim is really just a tool developed for learning ROS. Something like Stage (http://www.ros.org/wiki/stage) is a better choice.
Josh
hi. my project is to create a simple maze and make an autonomous robot solve it.
i'm planning to adapt the turtle sim as my base package.
how to create a custom map(or arena) rather than the default plain one?
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