Homework #1

TurtleSim Digit Drawing

Description: A single Python ROS node that launches four turtles in a turtlesim_node window and commands each turtle to draw one digit. The four digits correspond to the last four digits of a student ID, and all four turtles draw their respective digits simultaneously (in parallel).

Steps:

1. Launch of Simulator. turtlesim_node is started in a separate terminal before running your script. Your node connects to the already-running simulator.
2. Additional turtles get spawned. The simulator starts with one turtle (turtle1). /spawn service creates three more, giving a total of four turtles.
3. Positioning of the turtles. Each turtle teleports to a starting location so the four digits will appear side by side without overlapping. Canvas is divided into four vertical zones.
4. Designing digit shapes. Each digit is drawn using straight lines and turns. No need for pixel-perfect rendering — the digits need to be clearly recognizable.
5. Drawing digits in parallel. All four turtles actively draw at the same time. A sequential approach will not receive full marks.

Result: Last four digits of a student ID.

Example: ID = U2010164
- turtles draw 0, 1, 6, and 4 from left to right.