Algorithm (Workflow)

This function, CPLplotbufferlines, is designed to plot buffer lines for a closed polygon contour. It is part of the SolidGeometry library and was introduced in version 4.8. The function takes in parameters related to closed polygon lines and the distance between buffer lines, and outputs a handle to the graphics.

Input Parameters

• CPL: This is the Closed Polygon Line. If not provided, the function defaults to using CPLsample(29).
• w: This parameter represents the distance between the buffer lines. If not specified, it defaults to the minimum positive value of ss divided by 30, with a maximum of 15 lines.

Output

• h: This is the handle to the graphics object created by the function.

Algorithm Steps

1. The function begins by retrieving the CPL parameter using getfuncparams. If not provided, it defaults to CPLsample(29).
2. It calculates bounding box parameters using sofBB and BBofCPL functions.
3. The distance w is determined using getfuncparams. If not specified, it defaults to min(ss(ss>0))/30.
4. An iterative process begins with the initial CPLi set to CPL.
5. In each iteration, CPLbuffer is called to create a buffer line at a distance -w from the current polygon.
6. If the resulting CPLi is not empty, it increments the counter s and plots the buffer line using CPLplot with a color determined by colofn.
7. The process repeats until CPLi becomes empty, indicating no further buffer lines can be created.
8. The function returns the handle h to the plotted graphics.