Multiple Return Values in OpenSCAD

OpenSCAD doesn’t have built-in support for multiple return values or functions in the same way as some other programming languages. However, we can simulate this behavior using lists. Here’s an equivalent implementation:

// This function returns a list of two values
function vals() = [3, 7];

// Main execution
function main() = {
    // We use list indexing to access the returned values
    a = vals()[0];
    b = vals()[1];
    echo(a);
    echo(b);

    // If you only want a subset of the returned values,
    // you can simply ignore the other values
    c = vals()[1];
    echo(c);
};

// Call the main function
main();

In OpenSCAD, functions are the closest equivalent to the concept of multiple return values. Here’s how this example works:

1. We define a function vals() that returns a list containing two values, [3, 7].

2. In the main() function, we call vals() and use list indexing to access the individual values.

3. We use the echo() function to print the values, as OpenSCAD doesn’t have a direct equivalent to fmt.Println().

4. To simulate ignoring a return value, we simply don’t use the first value when we assign to c.

5. Finally, we call the main() function to execute our code.

When you run this OpenSCAD script, it will output:

ECHO: 3
ECHO: 7
ECHO: 7

Note that OpenSCAD is primarily a 3D modeling scripting language, so it doesn’t have many features of general-purpose programming languages. The concept of multiple return values is simulated here using lists, which is a common approach in languages that don’t natively support multiple return values.