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alpha challenge.html
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<html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"/><title>ROS Alpha Challenge</title><style>
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</style></head><body><article id="5dae6cb2-0921-4bfe-bf8e-02c49f454ebc" class="page sans"><header><div class="page-header-icon undefined"><img class="icon" src="https://avatars.githubusercontent.com/u/58915813?s=200&v=4"/></div><h1 class="page-title">ROS Alpha Challenge</h1></header><div class="page-body"><h2 id="dadbf21c-5867-4dc9-be41-a0998667497b" class="">Submission Link : <mark class="highlight-blue"><a href="https://forms.gle/1m2F5WU5LUyq1QZA8">Form</a></mark></h2><h2 id="1a1f4d49-a188-44a8-9cff-5a9541c61baf" class="">Complete The following tutorials in order before starting the challenge</h2><ul id="c1ca4e77-9fc8-4b90-ab94-8a15ab355904" class="bulleted-list"><li style="list-style-type:disc"><mark class="highlight-blue"><a href="http://wiki.ros.org/ROS/Tutorials/NavigatingTheFilesystem">Accessing ROS Files</a></mark></li></ul><ul id="92866218-bcb4-42d4-a3bc-2016fcbbe4ce" class="bulleted-list"><li style="list-style-type:disc"><mark class="highlight-blue"><a href="http://wiki.ros.org/ROS/Tutorials/CreatingPackage">Creating a ROS Package</a></mark></li></ul><p id="a5dc9faf-be00-496d-8a52-65c19b72b323" class="">It’s important to understand the first tutorial completely but it might be difficult to understand the
second tutorial. Therefore we have written the basic steps to create a ROS package.</p><pre id="5c505de9-8114-46e1-a660-4ef562496d83" class="code code-wrap"><code>cd ~/catkin_ws/src
catkin_create_pkg <package_name> [depend1] [depend2] [depend3]</code></pre><p id="6aadcad8-e8f4-447b-8f57-15ff833fc797" class="">Dependencies include <code>rospy</code> [for writing code in python] <code>roscpp</code> [for writing code in c++]</p><pre id="4b45a0a0-57b8-442b-8e78-23868867e984" class="code code-wrap"><code>cd ~/catkin_ws
catkin_make
. ~/catkin_ws/devel/setup.bash</code></pre><h1 id="00bc3d32-2561-408b-bd62-2aaba035a293" class="">Now it's time to apply the knowledge gained!</h1><h2 id="11ad24a5-6812-42ef-9bbf-5205a83958d8" class="">Task-0 (1st Submission)</h2><h3 id="e7ede385-7efd-4d64-84c9-e8aa349e9e84" class="">Turtlesim using keyboard</h3><ol type="1" id="2efa0892-3aa8-4027-93d2-acfbe0ba5409" class="numbered-list" start="1"><li>Make a video of about 10 seconds of turtle moving (controlled by arrow keys)</li></ol><ol type="1" id="a26bd4a7-e79d-430d-bb64-8152927b2a99" class="numbered-list" start="2"><li>Attach a screenshot of the rostopic list of turtlesim</li></ol><ol type="1" id="634bd790-a9b4-469f-9639-00b4031887ad" class="numbered-list" start="3"><li>Attach a screenshot of rosnode list of turtlesim</li></ol><h2 id="989cb677-9aed-4969-a06c-b8e2da19f5bc" class="">Task-1</h2><h3 id="5213d80e-387a-481f-a8df-cabde049d9a9" class="">Create a Package</h3><ol type="1" id="a2dbe360-e190-438e-8020-68c73e6f9308" class="numbered-list" start="1"><li>Create a package (inside the catkin_ws) with the name <code>alpha_challenge</code> with dependencies
<code>rospy</code></li></ol><ol type="1" id="c33133b4-6f73-439d-a2f3-63059536ecce" class="numbered-list" start="2"><li>Inside the <code>alpha_challenge</code> package folder (which would be inside the <code>catkin_ws</code> folder), create a new folder with the name <code>launch</code> and add <mark class="highlight-blue"><a href="https://drive.google.com/file/d/1IXLglz-zY6jrDceNTKqbFPn3_suk-6-i/view?usp=sharing">this</a></mark><mark class="highlight-blue"> </mark>file in the launch folder.</li></ol><ol type="1" id="e1f5610e-212f-4231-a40b-9c7f42211b46" class="numbered-list" start="3"><li>Inside the <code>alpha_challenge</code> package folder, create a new folder with the name <code>scripts</code> and add <mark class="highlight-blue"><a href="https://drive.google.com/file/d/124IHN6yT8nanFF8gRb0nuTYTnss1NEiL/view?usp=sharing">this</a></mark> file in the <code>scripts</code> folder.</li></ol><ol type="1" id="ea077b57-304d-4bff-824d-47d145557c9b" class="numbered-list" start="4"><li>cd to the <code>scripts</code> folder and make the python file executable with this command<pre id="e521ded3-7f2e-48ce-9423-cb1529c08090" class="code code-wrap"><code>chmod u+x move.py</code></pre></li></ol><ol type="1" id="9b9ad91e-da26-4bd4-8caa-c2b73c74dff9" class="numbered-list" start="5"><li>Don’t forget to do <code>catkin_make</code> when you add a package in <code>catkin_ws</code></li></ol><h2 id="2b30befd-858e-4d5f-8961-c62b364d1769" class="">Task-2 (2nd Submission)</h2><p id="1a5fe735-e543-408f-b82d-bf5914b75dea" class="">Create 3 new terminal windows, the submission must contain a single screenshot with
all 3 terminal windows together.</p><ul id="beedde7d-e327-41f0-a02c-ae56f5caf625" class="bulleted-list"><li style="list-style-type:disc"><strong>First Terminal: </strong>Use the command <code>roscd</code> to find the package path of the package
<code>task1</code> created above. [Apply the knowledge of 1st tutorial]</li></ul><ul id="66cd299c-4ca1-4aa3-a4da-2268ba14669c" class="bulleted-list"><li style="list-style-type:disc"><strong>Second Terminal: </strong>Repeat the above task by using the <code>rospack</code> command instead of
the <code>roscd</code> command.</li></ul><ul id="c4a91712-b427-4b12-b189-b396e3efb593" class="bulleted-list"><li style="list-style-type:disc"><strong>Third Terminal:</strong> Repeat the above task by using the <code>rosls</code> command instead
of the <code>rospack</code> command.</li></ul><p id="3bae4d9d-007c-4b77-94b3-9d768a9a0581" class="">
</p><h2 id="1883d16e-8583-4a11-8abf-6b1f3c927f62" class="">Task-3</h2><p id="771e03d4-63a1-47ea-9d76-2843e60f63a8" class="">Now you need to launch the given launch file you added in the first task using the following command</p><pre id="41a5c324-2852-45e0-b947-c50912d79e03" class="code code-wrap"><code>roslaunch alpha_challenge move.launch</code></pre><p id="332e0d77-af90-4052-8bd5-0d76c598f1eb" class="">
The turtlesim should move in a straight line.</p><p id="80edad6b-48fe-4ae6-860a-f750b1226730" class="">
Now, your task is to modify the code in the python file <code>move.py</code> such that it performs the
following subtasks:</p><ul id="c72fdf5e-e68c-40dd-aad6-a005c51f9e84" class="bulleted-list"><li style="list-style-type:disc">Move the turtlesim in an equilateral triangle of side length 2 units <strong>(3rd Submission)</strong></li></ul><ul id="0aa94faf-28aa-4879-bf85-f319519ffc26" class="bulleted-list"><li style="list-style-type:disc">Move the turtlesim in <mark class="highlight-blue"><a href="https://drive.google.com/file/d/1HIiEGLopHnFLLX3fzsZHDh2v97vn6MdD/view?usp=sharing">this</a></mark> manner <strong>(4th Submission)</strong></li></ul><h2 id="820f5d02-5641-450f-ad6e-84b6cea8bb3f" class="">Resources</h2><ul id="dd784834-b8fc-4ae9-8c38-c389c2d80579" class="bulleted-list"><li style="list-style-type:disc"><a href="https://docs.google.com/document/d/e/2PACX-1vSB9MhNMCEO5CZDHTJZywgwu4bNRz6qFqM8r8bgBlKM46_XdTsFqd0eGPiPIV-KAA/pub">ROS Zero Challenge</a></li></ul><ul id="c6981e86-edca-4876-9f2d-8db3b87f20a1" class="bulleted-list"><li style="list-style-type:disc"><a href="http://wiki.ros.org/turtlesim">Turtlesim</a></li></ul><ul id="9c7e702b-4d98-4021-9e3a-3efd9cced2a9" class="bulleted-list"><li style="list-style-type:disc"><a href="http://wiki.ros.org/Distributions">ROS Distros</a></li></ul><ul id="370d4f71-8f9a-401a-af8b-34aae80869a1" class="bulleted-list"><li style="list-style-type:disc"><a href="http://wiki.ros.org/ROS/Tutorials">ROS Tutorials</a></li></ul><p id="61d36cf9-dcba-4cab-a765-4974f9301639" class="">
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