Algorithm (Workflow)

This function, BBofCPS, calculates the bounding box for a given polyshape or a colored polyshape struct (CPS). The function is part of the SolidGeometry library and was introduced in version 4.5.

Input Parameters

• CPS: This can be either a colored polyshape struct or a polyshape. If CPS is a struct, it is expected to have a field named 'ps' which contains the polyshape.

Output Results

• bb: The bounding box of the given polyshape or CPS. It is returned as a two-element vector containing the coordinates of the bounding box.

Algorithm Steps

1. The function first checks if the input CPS is a struct with a field named 'ps'. If so, it assigns the value of CPS.ps to the variable ps. Otherwise, it assigns CPS directly to ps.
2. It then calculates the bounding box of the polyshape ps using the boundingbox function. This function returns two values, a and b, which represent the coordinates of the bounding box.
3. The bounding box coordinates are combined into a single vector bb as [a b].
4. If no output is requested (i.e., nargout==0), the function proceeds to visualize the results:
• It calls SGfigure to create a new figure window.
• It plots the polyshape ps using CPSplot.
• It calculates the closed polygon list (CPL) of the bounding box using CPLofBB with a margin of 0.
• Finally, it plots the CPL using CPLplot with a blue line of width 2.

Example Usage

An example of how to use the function is provided:

ps = polyshape(PLcircle(10));
BBofCPS(ps);

This example creates a polyshape of a circle with a radius of 10 and calculates its bounding box using the BBofCPS function.