GDL is not case sensitive. A variable can read accessory_object in the parameters and ACCESSORY_OBJECT in the 3d script. I match cases between them for clarity. I also use ALL CAPS for script commands, such as IF/THEN, GOSUB or MULZ, and lower case for parameter variables, such as ShadeControl.
0 and 1 are controls in a script which can tell an element to be off or on for boolean operations
With very few exceptions, special characters are not allowed
! before a line denotes the line is not applied to the script. This is useful for headings, scripting notes, organizational lines or script dividers
When copying a new 2d script in, review the parameter values in the script & coordinate them with the parameter names available. Default values are typically seen as penAttribute_1,2,3…, fillAttribute_1,2,3…, lineTypeAttribute_1,2,3…, etc. Where a fill is used in a saved object’s 2d script look for a line similar to the 3rd line in FIG. G.
FIG. G Sample 2d Script from a Saved Plan Symbol
poly2 describes the fill, the addition of _b{5} provide additional options for fill direction, scale, edges can be omitted etc. A simple poly2 is sufficient if scripting from scratch or rewriting portions of the script.
The important elements to coordinate are the penAttribute_n from this line. The first of the attribute is the foreground pen for the fill, the second is the background fill.
If you save out the primary object (assuming you are combining scripts), clearly denote which pens are used for what function, then coordinating the correct penAttribute into a pasted script is simple to replace the number in the penAttribute_n