Algorithm (Workflow)

This function, PLcircleui, is designed to interactively create a point list (PL) for a circle. It is part of the SolidGeometry library and was developed by Tim Lueth in 2019.

Input Parameters

The function does not take any input parameters directly when called. Instead, it relies on user interaction to define the circle's parameters.

Output

The function returns a point list (PL) representing the circle.

Algorithm Steps

1. The function calls ginput2Dcircle, which allows the user to interactively define a circle in a 2D space. This function returns two values:
   • cc: The center coordinates of the circle.
   • cr: The radius of the circle.
2. Next, the function calls PLcircle(cr), which generates a point list for a circle with the specified radius cr.
3. The center coordinates cc are added to the point list to position the circle correctly in the 2D space.
4. If the function is called without an output argument, it automatically plots the circle using PLplot(PL,'r-'), which displays the circle in red.

Additional Information

The function is part of a larger library that includes various utilities for creating and manipulating geometric shapes. It is specifically designed for interactive use, allowing users to define shapes visually.