Automatically select plates according to standard parts.

[pofenx]

Hello, when actually purchasing sheet materials, the length is generally not fixed. For example, steel coils can be cut to any length (e.g., any number of meters as needed), but the width is usually fixed—such as steel coils with widths of 1.2m, 1.5m, 1.8m, 2m, etc. The length can generally be freely cut within 15 meters. My current approach is: when arranging the first part on each sheet, set the sheet's length directly to the length of the first part being placed. The program sorts parts by area before nesting, but the current issue is that the width cannot be fixed. It needs to select a width from standard values (i.e., 1.2m, 1.5m, 1.8m, 2m, etc.) to maximize material utilization, which means minimizing the remaining width.

For example, when placing the fifth part on the first sheet:

• If the initial sheet width is 1.5m, placing the fifth part may leave a remaining width of 0.1m for a 1.2m width.
• However, if six parts can be placed exactly without any remaining width, the sheet width should automatically switch to 1.2m, and then the sixth part is placed.

This is just a rough example—I’m not entirely sure how to handle the specific logic or modify the code. Do you have any good suggestions or know how to adjust the code?