[User]
I'd like to design some customizable labels for a project I'm working on, and I'd like to use OpenSCAD. I've got two main designs in mind: side labels and a title label, both intended for a reminder system.

For the side labels, I need a rectangular base with text on it. The design should be parametric, so I can easily change the following:

*   **Font:** The ability to select any font available on my system.
*   **Font Size:** The size of the text.
*   **Letter Spacing:** Adjust the space between letters.
*   **Text Inset:** A boolean value to control if the text is raised or inset (cut out from the base). I would need the text to be an extrusion for raised text and a cut for inset text.
*   **Label Text:** The actual text on the label.
*   **Base Width, Height, and Thickness:** Dimensions of the rectangular base, these parameters should also have default values if no user input.
*   **Centering:** Text should be horizontally and vertically centered on the face of the base.

I want this as one single `.scad` file, please. I don't think I need any external libraries for this.

Separately, for the title label, I'm thinking of something similar but more complex. I'd like it to have a rectangular base with an inset border as well as the text. I should be able to control the same font and text properties for this title as I could for the side labels, with the same options for inset and raised text. I should also be able to control:

*   **Inset Border Width:** The thickness of the border that is cut out of the base.
*   **Base Width, Height, and Thickness:** Just like the side label, with default values if no user input.

This title should be saved as a separate file from the side labels, please. Just like the side labels, I don't believe that I need any external libraries.

[Assistant]
Labels.scad:
```
// Define the font
font = "Arial";
// Defind size of the text
fontsize = 3.7;
// Defind spaceing between the letters
spacing = 1.1;
// Select if you want the Letters to be inset
//inset = false;

// Define what to be displayed on the plate
name = "Morning";

// Define the size and thickness of the name plate
/*[Hidden ]*/
//Define the width of the base (Only use if need to update for printer tolerance)
width = 20;
//Define the height of the base (Only use if need to update for printer tolerance)
height = 10;
//Define the thickness of the base (Only use if need to update for printer tolerance)
thickness = 2;

cube([width, height, thickness]);
translate([width/2, height/2, thickness])
linear_extrude(height = 1)
text(name, size = fontsize, font = font, spacing = spacing, halign = "center", valign = "center");

// if(inset == false) {
//     cube([width, height, thickness]);
//     translate([width/2, height/2, thickness])
//     linear_extrude(height = 1)
//     text(name, size = fontsize, font = font, spacing = spacing, halign = "center", valign = "center");
//     }
//   else {
//     difference() {
//       cube([width, height, thickness]);
//       translate([width/2, height/2, thickness/2])
//       linear_extrude(height = 1)
//       text(name, size = fontsize, font = font, spacing = spacing, halign = "center", valign = "center");
//   }
//   }

// Create a rectangular base for the plate

//translate([2, 2, thickness])

/*difference() {
  cube([width, height, thickness]);
  translate([2, 2, thickness])
    cube([width - 4, height - 4, thickness]);
}*/

// Create the text on the plate
/*translate([width/2, height/2, thickness])
  linear_extrude(height = 2)
    text(name, size = fontsize, font = font, spacing = spacing, halign = "center", valign = "center");
    */
```


[User]
Okay, I'm looking to create some customizable labels for a feeder, similar to what I have on Thingiverse. I have a couple of designs in mind, one for a title plate and one for side labels, but I would like them to be much more robust and adjustable. I need the labels to be parametric so I can easily adjust the text, size, and other parameters.

For the title plate, I need the ability to:
*   Change the text of the label.
*   Change the font. I’d like to use a font similar to Arial, and be able to change its point size.
*   Adjust letter spacing.
*   Set the overall width, height, and thickness of the plate.

I would also like to choose if the text is raised or inset. If inset, the text should be recessed into the plate and be the same thickness.

For the side labels, I'm envisioning them to be similar to the title plate but should be able to:
*   Change the text of the label.
*   Change the font. I’d like to use a font similar to Arial, and be able to change its point size.
*   Adjust letter spacing.
*   Adjust the overall width, height, and thickness of the labels.

I will need to be able to specify the offset of the text, relative to the base in the x, y and z dimensions.

I also want to be able to specify the base plate size. Additionally, the text should be offset in x, y, and z dimensions, with the ability to specify the extrusion height, in a similar way to the offset.

Can you create these using OpenSCAD?

[Assistant]
Title.scad:
```
// Define the font
font = "Arial";
// Defind size of the text
fontsize = 4.1;
// Defind spaceing between the letters
spacing = 1.1;
// Select if you want the Letters to be inset
//inset = false;

// Define what to be displayed on the plate
name = "DONT LET THEM LIE";

// Define the size and thickness of the name plate
/*[Hidden ]*/
//Define the width of the base (Only use if need to update for printer tolerance)
width = 65;
//Define the height of the base (Only use if need to update for printer tolerance)
height = 12;
//Define the thickness of the base (Only use if need to update for printer tolerance)
thickness = 2;

cube([width, height, thickness]);
translate([width/2, height/2, thickness])
linear_extrude(height = 1)
text(name, size = fontsize, font = font, spacing = spacing, halign = "center", valign = "center");

// if(inset == false) {
//     cube([width, height, thickness]);
//     translate([width/2, height/2, thickness])
//     linear_extrude(height = 1)
//     text(name, size = fontsize, font = font, spacing = spacing, halign = "center", valign = "center");
//     }
//   else {
//     difference() {
//       cube([width, height, thickness]);
//       translate([width/2, height/2, thickness/2])
//       linear_extrude(height = 1)
//       text(name, size = fontsize, font = font, spacing = spacing, halign = "center", valign = "center");
//   }
//   }

// Create a rectangular base for the plate

//translate([2, 2, thickness])

/*difference() {
  cube([width, height, thickness]);
  translate([2, 2, thickness])
    cube([width - 4, height - 4, thickness]);
}*/

// Create the text on the plate
/*translate([width/2, height/2, thickness])
  linear_extrude(height = 2)
    text(name, size = fontsize, font = font, spacing = spacing, halign = "center", valign = "center");
    */
```


[User]
Okay, I'd like a parametric design for a coffee cup, similar to the disposable ones you get at coffee shops. It should include options for four different sizes, roughly corresponding to 12oz, 16oz, 20oz, and 24oz cups. The actual volume isn't critical, but I'd like the overall dimensions (height, top and bottom diameters) to be fairly accurate to those standard sizes. I'd like the ability to generate just the cup, or the cup with a lid, and an optional coffee collar. It should also be able to make the cup solid instead of hollow, for things like dollhouses. Finally, there should be an option to generate just the lid alone.

I'd also like to be able to control the smoothness of curves, so a variable for `$fn` should be included. It is important that the wall thickness of the cup is variable as well. I'd like to define the wall thickness as a variable.

The lid doesn't need to be an exact replica of any standard lid, it just needs to have a generally similar look, with a lip that extends over the edge of the cup, and a raised center portion.

The coffee collar should fit the cup at a height roughly proportional to the height of the cup at its bottom radius.

I'd prefer it if the design was done in OpenSCAD. I think it might be good to use the `BOSL2` library for some of the 2D shapes. Specifically, I think that the profile for the collar should be a "cone" shape, not a cylinder. It would be great if the code would take advantage of the `parametric_cone` function in that library. I'd like to include a variable to control how high up the cup the coffee collar sits.

Also, it would be great if the code was written with comments so I can more easily understand how it works. Thanks.

[Assistant]
Coffee_Cup_Maker.scad:
```
// Select the coffee cup size you want to print:
Coffee_cup_size = 1; // [1:12oz, 2:16oz, 3:20oz, 4:24oz]

// Check to include lid. Uncheck to remove lid.
include_lid = true;

//Check to include coffee collar. Uncheck to remove coffee collar.
include_collar = true;

//Check to make cup solid. Useful if printing the whole object or if downscaling for (e.g.) a doll house.
solid_cup = false;

//Check to make just the lid. This will override any coffee cup size selection, so you will need to uncheck this again to make the coffee cup appear.
just_the_lid = false;

// Increase to smooth all circles, decrease to make them blockier.
$fn = 80;

if (just_the_lid) {
    example_lid();
} else if (Coffee_cup_size == 1) {
    example_12oz();
} else if (Coffee_cup_size == 2) {
    example_16oz();
} else if (Coffee_cup_size == 3) {
    example_20oz();
} else if (Coffee_cup_size == 4) {
    example_24oz();
}

module example_24oz() {
    difference() {
        union() {
            cylinder(180, r1=58.2/2, r2=90/2);

            translate([0,0,180])
            rotate_extrude(angle=360,convexity=10)
            translate([58.2-14,0,0])
            circle(2.5);
        }

        if(!solid_cup) {
        translate([0,0,0.5])
        cylinder(180, r1=58.2/2-1, r2=90/2-1);
        }
    }

    if(include_lid) {
        translate([0,0,178])
        example_lid();
    }

    if(include_collar) {
        example_collar(180);
        }
}

module example_20oz() {
    difference() {
        union() {
            cylinder(152, r1=62/2, r2=90/2);

            translate([0,0,152])
            rotate_extrude(angle=360,convexity=10)
            translate([58.2-14,0,0])
            circle(2.5);
        }
        if(!solid_cup) {
        translate([0,0,0.5])
        cylinder(152, r1=62/2-1, r2=90/2-1);
        }
    }

    if(include_lid) {
        translate([0,0,150])
        example_lid();
    }

    if(include_collar) {
        example_collar(152);
        }
}

module example_16oz() {
    difference() {
        union() {
            cylinder(135, r1=58.2/2, r2=90/2);

            translate([0,0,135])
            rotate_extrude(angle=360,convexity=10)
            translate([58.2-14,0,0])
            circle(2.5);
        }

        if(!solid_cup) {
        translate([0,0,0.5])
        cylinder(135, r1=58.2/2-1, r2=90/2-1);
        }
    }

    if(include_lid) {
        translate([0,0,133])
        example_lid();
    }

    if(include_collar) {
        example_collar(135);
        }
}

module example_12oz() {
    difference() {
        union() {
            cylinder(108, r1=59/2, r2=90/2);

            translate([0,0,108])
            rotate_extrude(angle=360,convexity=10)
            translate([58.2-14,0,0])
            circle(2.5);
        }

        if(!solid_cup) {
        translate([0,0,0.5])
        cylinder(108, r1=59/2-1, r2=90/2-1);
        }
    }

    if(include_lid) {
        translate([0,0,106])
        example_lid();
    }

    if(include_collar) {
        example_collar(108);
        }
}

module example_lid() {
    difference() {
        // Make the two layers of the lid.
        union() {
            cylinder(10, r1=90/2+4, r2=90/2);

            translate([0,0,10])
            cylinder(5, r1=90/2-0.5, r2=90/2-2);
        }
        // Subtract the center from the lid.
        translate([0,0,10.01])
            cylinder(5, r1=90/2-15, r2=90/2-12);
    }
        // Add the interior raised section seen in some cup lids.
        translate([0,0,3]) {
            difference() {
                cylinder(10.1,r=90/2-10);

                translate([0,90/2-10,0])
                cube(90, center=true);
        }
    }
}

module example_collar(cone_h=40) {
    collar_h = 60;
    R_b = 59/2;
    R_t = 90/2;
    r_h = 82.05/2;

    echo("R_b == ", R_b,"  R_t == ", R_t,  "  r_h == ", r_h);

    if (r_h >= R_b && r_h <= R_t) {
        h = cone_h * ((r_h - R_b) / (R_t - R_b));
        echo("Height at which the radius is", r_h, ":", h);

        collar_R_b = ((h - collar_h) / cone_h) * (R_t - R_b) + R_b;
        echo("Radius for the bottom of the collar is: ", collar_R_b);

        color("red")
        translate([0,0,h-collar_h])
        difference() {
            cylinder(collar_h, r1=collar_R_b+2, r2=r_h+2);
            translate([0,0,-0.01])
            cylinder(collar_h+0.02, r1=66.15/2, r2=r_h);
    }
    } else {
        echo("Radius", r_h, "is out of the cone's bounds.");
    }
}
```


[User]
Hey there! I'm looking to design a parametric wire straightener, and I think OpenSCAD would be perfect for it. I've got some ideas about the basic structure, but I need help turning it into functional code.

Here's what I'm envisioning:

The core of the design will consist of a base with two rows of rollers. The rollers themselves will be mounted using bushings and held in place by tool-less pins. The idea is to feed a wire or tube through the rollers to straighten it. I need this to be configurable for both square and round profiles.

**Key Parameters:**

*   **`wire_shape`**:  A string parameter that will be either "square" or "round" to define the cross-section of the wire/tube being straightened.
*   **`wire_diameter`**:  The diameter (or side length if square) of the wire/tube in millimeters.
*   **`assembly`**: A string parameter to select what to display/generate. Options should be:
    *   `"assembled"`: For previewing the full assembly of the device.
    *    `"plated"`:  For outputting all parts laid flat for printing.
    *    `"base"`: For generating the base only.
    *    `"bushings"`:  For generating just the bushings.
    *    `"pins"`: For generating just the pins.
*   **`tolerance`**:  A float value to control fit tolerances.
*    **`bushing_thickness`**: The thickness of the bushings.
*   **`$fn`**:  An integer for controlling the resolution of curves. It should default to 32, but have options for 64, 128, 256, and 360.
*   **Bearing Dimensions:**
    *   `bearing_id`: Inside diameter of the bearing (8mm for a 608 bearing).
    *   `bearing_od`: Outside diameter of the bearing (22mm for a 608 bearing).
    *   `bearing_width`: Width of the bearing (7mm for a 608 bearing).

**Derived Parameters:**

*   `press_fit`, `close_fit`, `loose_fit`, and `shrink_fit` should all be calculated based on the tolerance, with some multipliers.
*  `bearing_ir` and `bearing_or` should be calculated based on the `bearing_id` and `bearing_od`, respectively.
*   `bearing_spacing_x` and `bearing_spacing_y` will determine the distance between bearings on the x and y axes. It should be calculated based on `bearing_od`, `bushing_thickness`, and the `loose_fit` and `shrink_fit` tolerances respectively.
*  `plated_spacing` should be calculated based on `bearing_od`, `bushing_thickness`, and `loose_fit`.

**Modules:**

*   **`create_bushing()`**: Generates a bushing with the correct inner diameter for the bearing and a wire/tube channel that matches the `wire_shape` and `wire_diameter`. It should also take into account shrink fit.
*   **`create_pin()`**: Creates a tool-less pin that has a head on one end and a barb on the other. Needs to also take into account a tolerance so they fit.
*   **`create_channel()`**: Generates a channel for wire/tube using a cube for square wires, or a cylinder for round wires.
*   **`place_roller()`**: Creates an inner roller that goes inside the bearing.
*   **`place_socket()`**: Creates the outer bearing socket, this needs to scale slightly to eliminate stringing.
*   **`create_base()`**: Generates the base for the whole device, placing all the rollers, sockets, and a channel.
*   **`create_bearing()`**: For preview purposes, create the bearing itself.

**Assembly Logic:**

Based on the `assembly` parameter, the code should:

*   If `"assembled"`, it should show a complete assembled view.
*    If `"plated"`, the code should output the base, a mirrored copy of the base, pins, and bushings all laid flat.
*    If `"base"`, the code should show only the base and mirrored base (rotated 180 degrees).
*    If `"bushings"`, the code should output just a plate of bushings.
*    If `"pins"`, the code should output a plate of pins.

I think that's everything.  I'd be very grateful if you could generate OpenSCAD code that implements this. Let me know if you need any clarification or have any questions!

[Assistant]
wirestraightener.scad:
```

//cross-sectional profile of your tube or wire
wire_shape="square"; // [square, round]
//diameter of wire in mm
wire_diameter = 1;
//use "plated" to print all parts. "assembled" is only for preview
assembly="assembled"; // [assembled, plated, base, bushings, pins]
//must be greater than zero
tolerance = 0.06;
//should be more than your wire diameter
bushing_thickness = 4;
//curve resolution. Higher is smoother but longer render time.
$fn = 32; // [32,64,128,256,360]

/* [bearing dimensions] */
//608 = 8
bearing_id = 8;
//608 = 22
bearing_od = 22;
//608 = 7
bearing_width = 7;

/************************
** Tolerance definitions
** Depending on your printer, material and profile, you may want to
** adjust these for best results. Defaut options are for PLA on
** Ender 3 with MicroSwiss DD ext/hot end.
*************************/
press_fit = tolerance;
close_fit = 2 * tolerance;
loose_fit = 3 * tolerance;
shrink_fit = -0.5*tolerance;

/*Other definitions*/
bearing_ir = bearing_id/2;
bearing_or = bearing_od/2;
bearing_spacing_x = bearing_od+bushing_thickness*2+2*loose_fit;
bearing_spacing_y = bearing_od+bushing_thickness*2+2*shrink_fit;
plated_spacing = bearing_od+bushing_thickness*2+10*loose_fit;

module create_bushing() {
    rotate_extrude() {
        translate([bearing_or + press_fit, 0, 0]) {
            difference() {
                square([bushing_thickness, bearing_width]);
                if(wire_shape=="square"){
                    translate([bushing_thickness, bearing_width/2 - sqrt(2 * (wire_diameter+shrink_fit))/2, 0])
                        rotate(45)
                            square(wire_diameter+shrink_fit);
                } else {
                    translate([bushing_thickness, bearing_width/2, 0])
                        circle(d=wire_diameter+shrink_fit);

                }
            }
        }
    }
}

module create_pin() {
    pin_length = 7/3*bearing_width+close_fit;
    pin_r = 1/2*bearing_ir-close_fit;
    cap_thickness = pin_r/2;
    cap_r = pin_r*2;
    lip_length = pin_r*0.5;
    lip_r = pin_r*1.3;

    // Create the main pin
    difference() {
        intersection() {
            union() {
                cylinder(h = pin_length, r = pin_r);

                // Create the cap at one end
                translate([0, 0, pin_length]) {
                    cylinder(h = cap_thickness/2, r1 = cap_r, r2 = cap_r);
                    translate([0, 0, cap_thickness/2]) {
                        cylinder(h = cap_thickness/2, r1 = cap_r, r2 = pin_r);
                    }
                }

                // Create the lip at the other end
                translate([0, 0, -lip_length/4]) {
                    cylinder(h = lip_length/4, r1 = lip_r, r2 = pin_r);
                }
                translate([0, 0, -lip_length]) {
                    cylinder(h = lip_length*3/4, r1 = pin_r, r2 = lip_r);
                }
            }

            // flatten
            cube([2*cap_r,1.5*pin_r,3*pin_length], center = true);
        }

        // create cut-out tip
        translate([0, 0, -lip_length-tolerance]) {
            cylinder(h = pin_length/5, r = pin_r*2/3);
            translate([0, 0, pin_length/8]) {
                cube([pin_r*2/3, pin_r*2, pin_length/4], center = true);
            }
            translate([0, 0, pin_length/4]) {
                rotate([90, 0, 0]) {
                    cylinder(h = pin_r*2, r = pin_r*1/3, center = true);
                }
            }
        }
    }
}

module create_channel() {
    if(wire_shape=="square"){
        rotate([45,0,0])cube([bearing_id+3.5*bearing_spacing_x,wire_diameter * 1.5,wire_diameter * 1.5], center= true);
    } else {
        rotate([0,90,0])cylinder(h=bearing_id+3.5*bearing_spacing_x,d=wire_diameter * 1.5,center = true);
    }
}

module place_roller(){
    difference(){
        union(){
            cylinder(h=bearing_width/2+close_fit,r=bearing_ir-shrink_fit);
            cylinder(h=press_fit,r=1.2*bearing_ir);
        }
        translate([0,0,-bearing_width-tolerance])cylinder(h=bearing_width*2,r=bearing_ir/2+close_fit);
    }
}

module place_socket(){
    cylinder(h=bearing_width+2*loose_fit,r=bearing_or+bushing_thickness+(bearing_or+bushing_thickness)*bearing_spacing_x*0.00161); // this *should* scale to eliminate stringing
    translate([0,0,-bearing_width-tolerance])cylinder(h=bearing_width*2,r=bearing_ir/2+close_fit);
}

module create_base(){
    intersection(){
        union(){
            difference(){

                // create the block
                cube([bearing_id+3.5*bearing_spacing_x,bearing_od+2*bushing_thickness+bearing_id,bearing_width*7/6]);

                // subtract the first row of sockets at multiples of the x bearing spacing
                for(x=[0,1,2,3.5]){
                    translate([bearing_ir+x*bearing_spacing_x,bearing_ir,bearing_width*2/3]){

                    // inner socket squeeze margin
                        if(x==1||x==2){
                            translate([0,0.1*wire_diameter-2*shrink_fit,0])
                                place_socket();
                        } else {
                            place_socket();
                        }
                    }
                }

                // subtract the second row of sockets
                for(x=[0,1.5,2.5,3.5]){
                    translate([bearing_ir+x*bearing_spacing_x,bearing_ir+bearing_spacing_y,bearing_width*2/3]){

                    // inner socket squeeze margin
                        if(x==1.5||x==2.5){
                            translate([0,-0.1*wire_diameter+2*shrink_fit,0])
                                place_socket();
                        } else {
                            place_socket();
                        }
                    }
                }
                // cut out the channel
                translate([0.5*(bearing_id+3.5*bearing_spacing_x),bearing_spacing_y/2+bearing_ir,7/6*bearing_width])create_channel();

            }

            // place the first row of rollers
            for(x=[0,1,2,3.5]){
                translate([bearing_ir+x*bearing_spacing_x,bearing_ir,bearing_width*2/3]){

                    // inner roller squeeze margin
                    if(x==1||x==2){
                        translate([0,0.1*wire_diameter-2*shrink_fit,0])
                            place_roller();
                    } else {
                        place_roller();
                    }
                }
            }

            // place the second row of rollers
            for(x=[0,1.5,2.5,3.5]){
                translate([bearing_ir+x*bearing_spacing_x,bearing_ir+bearing_spacing_y,bearing_width*2/3]){

                    // inner roller squeeze margin
                    if(x==1.5||x==2.5){
                        translate([0,-0.1*wire_diameter+2*shrink_fit,0])
                            place_roller();
                    } else {
                        place_roller();
                    }
                }
            }
        }

        // trim off any protrusions past the boundaries of the block
        cube([bearing_id+3.5*bearing_spacing_x,bearing_od+2*bushing_thickness+bearing_id,bearing_width*7/6]);
    }
}

//for preview purposes
module create_bearing(){
     rotate_extrude() {
        translate([bearing_ir, 0, 0]) {
                square([bearing_or-bearing_ir, bearing_width]);

            }
        }
    }

// build assembly

if(assembly=="assembled" || assembly=="base" ||  assembly=="plated" ){

    create_base();

    if(assembly=="assembled"){

        translate([0,0,bearing_width*7/3+2*close_fit])mirror([0,0,1])create_base();

        for(x=[0,1,2,3.5]){

            translate([bearing_ir+x*bearing_spacing_x,bearing_ir,0]){
                color("blue")create_pin();
                translate([0,0,bearing_width*2/3+close_fit]){
                    color("red")create_bushing();
                    %create_bearing();
                }
            }

        }

        for(x=[0,1.5,2.5,3.5]){

            translate([bearing_ir+x*bearing_spacing_x,bearing_ir+bearing_spacing_y,0]){
                color("blue")create_pin();
                translate([0,0,bearing_width*2/3+close_fit]){
                    color("red")create_bushing();
                    %create_bearing();
                }
            }
        }

    } else {

        translate([0,2.1*(bearing_od+2*bushing_thickness+bearing_id),0])rotate([180,0,0])mirror([0,0,1])create_base();

    }

}

if(assembly=="plated" || assembly=="bushings"){
    translate([0,-0.6*bearing_spacing_x,0]){

        for(x=[0,1,2,3]){
            translate([x*(bearing_spacing_x + 2),0,0])
                create_bushing();
        }

        for(x=[-0.5,0.5,1.5,2.5]){
            translate([x*(bearing_spacing_x+ 2),-0.9*bearing_spacing_x,0])
                create_bushing();

        }
    }
}
if(assembly=="plated" || assembly=="pins"){
    for(i=[0:3]){
        translate([0, i * 1.2*bearing_id + bearing_id/2, 0]) {
            translate([-3*bearing_width,0,0.75*(1/2*bearing_ir-close_fit)])rotate([90,0,90])create_pin();
            translate([-1*bearing_width,bearing_id*1.2/2,0.75*(1/2*bearing_ir-close_fit)])rotate([90,0,270])create_pin();
        }
    }
}

```


[User]
Hi, I'm looking for some help designing a customizable gingerbread man ornament in OpenSCAD. I'd like to be able to adjust the overall height, the text on the front, the font, the thickness, and the height of the rim, among other things. I'd also like a few different options for how the ornament is hung – either a small hole in the top, or a little loop at the top.

The main shape of the gingerbread man is going to be based on a bezier curve, and I've got all the control points for that. I'll need the ability to extrude this 2D shape, and then also extrude a rim around it, going upward at an angle. It should be a "stacked" rim that is wider at the bottom and goes up to the top surface width and height.

I'm also hoping to have the ability to add clothing details: a cap, a shirt collar with pockets, some buttons on the pants, and a pair of little hands that come up from near the waist. These clothing features should have the option to either be added on top of the main body or to be cut out of the body to create inlays. I'd also like to put a short word or phrase vertically on the gingerbread man.

I'd like to be able to render the whole thing as one part for a single-color print or to render out each of the body, rim, text, face, clothing, and hook as separate parts for a multicolor print.

I am also supplying the bezier control points that I based this project on.

I'd like to use the BOSL2 library if possible.

Here are the specific parameters I was hoping to control:

*   `display`: options for rendering "all", "bodybase", "bodytop", "rim", "word", "face", "hands", "cap", "shirt", "pantbuttons"
*   `manheight`: height of gingerbread man
*   `vtext`: text for front of the ornament
*   `fontface`: font for `vtext`
*   `fontsize`: font size of `vtext`
*   `thickness`: total thickness of cookie
*   `rim_height`: height of rim
*   `clothing_features`: boolean to show clothing or cutouts
*   `cutout_depth`: depth of elbow and pants cutouts
*   `eyelet_type`: integer to select 0=none, 1=internal planar, 2=internal perpendicular, 3=ring
*   `bzsteps`: number of steps to use for bezier curves

And here are the constants and bezier control points that will be used:
```
rimwid0 = 0.2;       // width of rim at top surface of cookie
maxrimoffset0 = 0.3; // width of rim at bottom of cookie

headtop0 = 3.63;        // top of head in bz scale
footbottom0 = -4.05;    // bottom of foot = minimum y of bezier curve

bzright = [ // bezier control points for right half of man
    [ [0,-2.528], [0.51,-2.528], [0.687,-2.822], [1.255,-3.763] ],
    [ [1.255,-3.763], [1.47,-4.073], [1.577,-4.115], [1.78,-3.968] ],
    [ [1.78,-3.968], [2.122,-3.75], [1.821,-3.701], [1.691,-3.555] ],
    [ [1.691,-3.555], [1.322,-3.253], [1.5,-2.952], [1.377,-1.713] ],
    [ [1.377,-1.713], [1.305,-0.47], [0.776,0.3], [1.59,0.552] ],
    [ [1.59,0.552], [2.183,0.776], [2.3,0.835], [2.3,1.022] ],
    [ [2.3,1.022], [2.3,1.296], [2.025,1.254], [1.427,1.43] ],
    [ [1.427,1.43], [0.472,1.661], [0.5,1.72], [0.55,2.068] ],
    [ [0.55,2.068], [0.632,2.537], [0.484,2.409], [0.575,2.73] ],
    [ [0.575,2.73], [0.634,2.975], [0.634,2.975], [0.491,3.149] ],
    [ [0.491,3.149], [0.1,3.63], [0.1,3.63], [0,3.63] ]
];

capbz = [
    [ [-0.522,2.642], [-0.217,2.866], [0.073,2.932], [0.53,2.88] ],
    [ [0.53,2.88], [0.581,3.023], [0.422,3.023], [0.3,3.214] ],
    [ [0.3,3.214], [0.211,3.328], [0.174,3.34], [0.048,3.333] ],
    [ [0.048,3.333], [-0.075,3.322], [-0.13,3.279], [-0.214,3.14] ],
    [ [-0.214,3.14], [-0.335,2.944], [-0.463,2.895], [-0.517,2.809] ],
    [ [-0.517,2.809], [-0.552,2.772], [-0.554,2.647], [-0.522,2.642] ]
];

elbowbz = [
    [ [1.534,0.972], [1.113,1.044], [0.854,1.266], [0.957,1.089] ],
    [ [0.957,1.089], [1.017,1.016], [1.098,0.876], [1.131,0.694] ],
    [ [1.131,0.694], [1.222,0.796], [1.361,0.893], [1.534,0.972] ]
];
pantbz = [
    [ [0.435,-2.64], [0.053,-1.571], [0.064,-1.54], [0,-1.537] ],
    [ [0,-1.537], [-0.064,-1.54], [-0.053,-1.571], [-0.435,-2.64] ]
];
```

Let me know if you need any other information. Thanks!

[Assistant]
gingerbread_cookie_ornament.scad:
```
/*
Customizable gingerbread man ornament
by Alex Matulich, December 2023

On Printables: https://www.printables.com/model/672976
On Thingiverse: https://www.thingiverse.com/thing:6358744

Adapted from a vintage metal cookie cutter https://www.etsy.com/listing/1502205227/vintage-gingerbread-man-cookie-cutter

Options for the "display" parameter:
* all: entire assembly with all parts merged, for single-color printing or slicer painting
* Other options are for generating separate files for multicolor printing:
    * bodybase: thick featureless part of cookie, color seen on sides and through cutouts
    * bodytop: top surface model, with optional cutouts
    * rim: perimeter that extends above the top body surface
    * face: eyes, nose, and mouth
    * hands: fingers near the waistline
    * word: vertical word text
    * cap: model of cap
    * shirt: collar and breast pockets
    * pantbuttons: buttons on pants legs
*/

include <BOSL2/std.scad>

// ---------- customizable parameters ----------

// what to render (all=single color, others for multi-color)
display = "all"; //[all, bodybase, bodytop, rim, word, face, hands, cap, shirt, pantbuttons]

// height of gingerbread man
manheight = 120;

// name to put on the front
vtext = "BE HAPPY";

// font to use for name
fontface = "Verdana";

// font size (adjust to fit)
fontsize = 4.8;

// total thickness of gingerbread "cookie"
thickness = 8;

// rim height above top surface
rim_height = 1.8;

// show clothing features when display=all or cutout when display=bodytop
clothing_features = true;

// depth of elbow and pants cutouts (< thickness)
cutout_depth = 1.5;

// eyelet: 0=none, 1=internal planar, 2=internal perpendicular, 3=ring
eyelet_type = 3;    //[0:3]

// bezier curve steps - use 4 to preview, 15 to render
bzsteps = 15;   //[4:15]

module dummy(){} // force customizer to stop here

// ---------- constants - do not modify ---------

rimwid0 = 0.2;       // width of rim at top surface of cookie
maxrimoffset0 = 0.3; // width of rim at bottom of cookie

headtop0 = 3.63;        // top of head in bz scale
footbottom0 = -4.05;    // bottom of foot = minimum y of bezier curve
scl = manheight / (headtop0 - footbottom0); // xy scaling factor to get desired man height
elbow = scl*2.3;        // rightmost position of elbow converted to mm
neckht = scl*1.5;       // y position of neckline converted to mm

// bezier points obtained from https://www.desmos.com/calculator/jbzob3oevu

bzright = scl * [ // bezier control points for right half of man
    [ [0,-2.528], [0.51,-2.528], [0.687,-2.822], [1.255,-3.763] ],
    [ [1.255,-3.763], [1.47,-4.073], [1.577,-4.115], [1.78,-3.968] ],
    [ [1.78,-3.968], [2.122,-3.75], [1.821,-3.701], [1.691,-3.555] ],
    [ [1.691,-3.555], [1.322,-3.253], [1.5,-2.952], [1.377,-1.713] ],
    [ [1.377,-1.713], [1.305,-0.47], [0.776,0.3], [1.59,0.552] ],
    [ [1.59,0.552], [2.183,0.776], [2.3,0.835], [2.3,1.022] ],
    [ [2.3,1.022], [2.3,1.296], [2.025,1.254], [1.427,1.43] ],
    [ [1.427,1.43], [0.472,1.661], [0.5,1.72], [0.55,2.068] ],
    [ [0.55,2.068], [0.632,2.537], [0.484,2.409], [0.575,2.73] ],
    [ [0.575,2.73], [0.634,2.975], [0.634,2.975], [0.491,3.149] ],
    [ [0.491,3.149], [0.1,3.63], [0.1,3.63], [0,3.63] ]
];

capbz = scl * [
    [ [-0.522,2.642], [-0.217,2.866], [0.073,2.932], [0.53,2.88] ],
    [ [0.53,2.88], [0.581,3.023], [0.422,3.023], [0.3,3.214] ],
    [ [0.3,3.214], [0.211,3.328], [0.174,3.34], [0.048,3.333] ],
    [ [0.048,3.333], [-0.075,3.322], [-0.13,3.279], [-0.214,3.14] ],
    [ [-0.214,3.14], [-0.335,2.944], [-0.463,2.895], [-0.517,2.809] ],
    [ [-0.517,2.809], [-0.552,2.772], [-0.554,2.647], [-0.522,2.642] ]
];

elbowbz = scl * [
    [ [1.534,0.972], [1.113,1.044], [0.854,1.266], [0.957,1.089] ],
    [ [0.957,1.089], [1.017,1.016], [1.098,0.876], [1.131,0.694] ],
    [ [1.131,0.694], [1.222,0.796], [1.361,0.893], [1.534,0.972] ]
];
pantbz = scl * [
    [ [0.435,-2.64], [0.053,-1.571], [0.064,-1.54], [0,-1.537] ],
    [ [0,-1.537], [-0.064,-1.54], [-0.053,-1.571], [-0.435,-2.64] ]
];

// ---------- initialize ---------

headtop = scl*headtop0; // top of head in mm scale
footbottom = scl*footbottom0; // y coordinate bottom of foot

rimwid = scl * rimwid0;     // width of rim in mm at top surface of cookie
maxrimoffset = scl * maxrimoffset0;

font = str(fontface, ":style=Bold Italic");

mergeparts = (display == "all");
featuredz = mergeparts ? 0.1 : 0;  // position+height correction for features
cfeatureht = max(0.4, 0.4*rim_height) + featuredz;   // height of clothing features

top_thickness = (cutout_depth <= 0 ? 1 : cutout_depth);

// build full set of bezier control points from right-half
bzpts = let(brl=len(bzright)-1) [
    // right half
    for(i=[0:brl]) bzright[i],
    // left half
    for(i=[brl:-1:0]) [
        for(j=[3:-1:0]) [ -bzright[i][j][0], bzright[i][j][1] ]
    ]
];

// generate polygon of inner outline in mm scale (rim extends outward from this)
baseoutline = let(bpl=len(bzpts)-1) [
    for(i=[0:bpl]) for(s=[0:bzsteps-1]) let(t=s/bzsteps) bezier_point2d(t, bzpts[i])
];

omaxi = len(baseoutline)-1;  // outline array maximum index for loops

// generate polygon for elbow cutouts
elbowcutoutline = let(n = len(elbowbz)-1) [
    for(i=[0:n]) for(s=[0:bzsteps-1]) let(t=s/bzsteps) bezier_point2d(t, elbowbz[i])
];

// generate polygon for pants cutout
pantcutoutline = let(n = len(pantbz)-1) [
    [pantbz[0][0][0], 2*pantbz[0][0][1]],
    for(s=[0:bzsteps-1]) let(t=s/bzsteps) bezier_point2d(t, pantbz[0]),
    for(s=[0:bzsteps]) let(t=s/bzsteps) bezier_point2d(t, pantbz[1]),
    [pantbz[1][3][0], 2*pantbz[1][3][1]]
];

// bezier control points for vertical profile of rim starting from bottom, up to a peak, and down to the inner rim at the top surface of the body
rimbz = [
    [ [maxrimoffset,0], [maxrimoffset, thickness-rim_height], [rimwid,thickness], [rimwid/2,thickness] ],
    [ [rimwid/2,thickness], [rimwid/8,thickness], [0,thickness-0.25*rim_height], [0,thickness-rim_height] ]
];

// build a stack of rims offset in size by the vertical rim profile, starting from bottom and ending at the inner rim
rimstack = [
    for(i = [0:len(rimbz)-1])
        for(s=[0:2:bzsteps-0.1]) let(
            rt = s/bzsteps,
            rimxy = bezier_point2d(rt, rimbz[i]),
            rimoff = rimxy[0],
            z = rimxy[1],
            outline = offset(baseoutline, delta=rimoff, closed=true, same_length=true)
        )
        [
            for(j=[0:omaxi]) [outline[j][0], outline[j][1], z]
        ],
        let(z = thickness-rim_height)
            [ for(j=[0:omaxi]) [baseoutline[j][0], baseoutline[j][1], z] ],
        let(z = thickness - rim_height - top_thickness)
            [ for(j=[0:omaxi]) [baseoutline[j][0], baseoutline[j][1], z] ]
];

// ---------- render ----------

cutcubedim = [2*elbow+4*maxrimoffset, manheight+4*maxrimoffset+12, 2*thickness];
cutcubeposup = [ -(elbow+2*maxrimoffset),footbottom-2*maxrimoffset-6, thickness-rim_height+0.001 ];
cutcubeposdn = [ cutcubeposup[0], cutcubeposup[1], -thickness-rim_height+0.001 ];

if (display == "all") {// rotate([90,0,0])
    union() {
        bodybase();
        topsurface();
        gbman_face();
        gbman_word();
        if (clothing_features) {
            clothing_cap();
            clothing_shirt();
            gbman_hands();
            clothing_pantbuttons();
        }
        if (eyelet_type == 3) ring_eyelet();
    }
} else if (display == "bodybase") {
    difference() {
        bodybase();
        translate(cutcubeposup) cube(cutcubedim);
    }
} else if (display == "bodytop") {
    topsurface();
} else if (display == "rim") {
    difference() {
        bodybase();
        translate(cutcubeposdn) cube(cutcubedim);
    }
} else if (display == "face") {
    gbman_face();
} else if (display == "hands") {
    gbman_hands();
} else if (display == "word") {
    gbman_word();
} else if (display == "cap") {
    clothing_cap();
} else if (display == "shirt") {
    clothing_shirt();
} else if (display == "pantbuttons") {
    clothing_pantbuttons();
}

// ---------- modules ----------

module bodybase() {
    color("goldenrod") union() {
        difference() {
            polyhedron_stack(rimstack);
            if (eyelet_type == 1) internal_eyelet_planar();
            if (eyelet_type == 2) internal_eyelet_perp();
        }
        if (eyelet_type == 3) ring_eyelet();
    }
}

module topsurface() {
    outline = mergeparts ? offset(baseoutline, delta=0.2, closed=true, same_length=true) : baseoutline;
    color("khaki") union() {
        difference() {
            translate([0, 0, thickness - rim_height - top_thickness - featuredz])
                linear_extrude(top_thickness+featuredz, convexity=6)
                    polygon(points = outline);
            if (cutout_depth > 0) translate([0,0,featuredz]) {
                linear_extrude(thickness, convexity=4) polygon(points=elbowcutoutline);
                mirror([1,0,0]) linear_extrude(thickness, convexity=4) polygon(points=elbowcutoutline);
                linear_extrude(thickness, convexity=4) polygon(points=pantcutoutline);
            }
            if (eyelet_type == 1) internal_eyelet_planar();
            if (eyelet_type == 2) internal_eyelet_perp();
        }
        gbman_word(true);
    }
}

module clothing_cap() {
    cstep = 1/bzsteps;
    color("red") translate([0,0,thickness-rim_height-featuredz])
        linear_extrude(cfeatureht, convexity=4) polygon(points=[
            for(i=[0:len(capbz)-1])
                for(t=[0:cstep:0.999]) bezier_point2d(t, capbz[i])
        ]);
}

module clothing_shirt() {
    color("silver") translate([0,0,thickness-rim_height-featuredz]) {
        // collar
        linear_extrude(cfeatureht) {
            rightcollar();
            mirror([1,0,0]) rightcollar();
        }
        // pockets
        translate(scl*[0.47,0.23,0]) cube([scl*0.36,scl*0.57,cfeatureht]);
        mirror([1,0,0]) translate(scl*[0.47,0.23,0]) cube([scl*0.36,scl*0.57,cfeatureht]);
    }
    module rightcollar() {
        hull() {
            translate(scl * [0.3,1.53]) circle(d=scl*0.1, $fn=16);
            translate(scl * [0.58,1.84]) circle(d=scl*0.06, $fn=16);
        }
    }
}

module clothing_pantbuttons() {
    buttoncoords = scl * [ [1.246,-2.446,0], [1.283,-2.758,0], [1.334,-3.073,0] ];
    buttondia = scl * 0.15;
    color("silver") translate([0,0,thickness-rim_height-featuredz]) {
        for(i=[0:2]) translate(buttoncoords[i]) button();
        mirror([1,0,0]) for(i=[0:2]) translate(buttoncoords[i]) button();
    }
    module button() {
        difference() {
            cylinder(cfeatureht, d=buttondia, $fn=16);
            translate([0,0,cfeatureht+0.33*buttondia])
                sphere(d=buttondia, $fn=16);
        }
    }
}

module gbman_face() {
    ht = max(0.5, 0.5*rim_height) + featuredz;
    yscale = clothing_features ? 1.0 : 1.15;
    color("cyan") scale([scl,scl,1]) translate([0,0,thickness-rim_height-featuredz]) union() {
        // eyes
        translate([0.3,2.45*yscale,0]) cylinder(ht, d=0.2, $fn=24);
        translate([-0.3,2.45*yscale,0]) cylinder(ht, d=0.2, $fn=24);
        // nose
        translate([0,2.26*yscale,0]) linear_extrude(ht) polygon(points=[[0,0], [0.12,-0.15], [-0.12,-0.15]]);
        // mouth
        translate([0,1.82*yscale,0]) linear_extrude(ht) polygon(points=[
            for(x=[-0.25:0.05:0.251]) [x,3*x*x-0.05],
            for(x=[0.25:-0.05:-0.251]) [x,x*x+0.1]
        ]);
    }
}

module gbman_hands() {
    color("green") translate([0,0,thickness-rim_height-featuredz]) {
        linear_extrude(cfeatureht, convexity=6) rightfingers();
        linear_extrude(cfeatureht, convexity=6) mirror([1,0,0]) rightfingers();
    }
    module rightfingers() {
        fingerdia = scl * 0.06;
        loc1 = scl * [ [0.874,-0.642], [0.982,-0.569], [1.073,-0.516] ];
        loc2 = scl * [ [0.856,-0.52], [0.954,-0.452], [1.06,-0.396] ];
        for(i=[0:2]) hull() {
            translate(loc1[i]) circle(d=fingerdia, $fn=16);
            translate(loc2[i]) circle(d=fingerdia, $fn=16);
        }
    }
}

module gbman_word(deep=false) {
    startht = deep ? thickness-rim_height-cutout_depth : thickness - rim_height - featuredz;
    ht = deep ? cutout_depth : 0.5*rim_height + featuredz;
    vlen = len(vtext);
    if (vlen > 0) color("magenta") union() {
        for(i=[0:vlen-1])
            translate([0,neckht-fontsize-0.8-i*fontsize*1.3, startht]) linear_extrude(ht, convexity=6) text(vtext[i], size=fontsize, font=font, halign="center");
    }
}

module ring_eyelet() {
    stretch = 1/cos(22.5);
    od = 2*stretch;
    translate([0,headtop+maxrimoffset,0])
        rotate([0,-90,0]) scale(max(1,thickness/6)) translate([3,1,0]) union() {
            octagon2mmring();
            rotate([90,0,0]) translate([-2,0,0]) rotate([0,0,22.5]) cylinder(3, d=od, $fn=8);
        }
}

module octagon2mmring() { // called by ring_eyelet()
    stretch = 1/cos(22.5);
    od = 2*stretch;
    rotate([0,0,22.5]) rotate_extrude(angle=360, convexity=4, $fn=8)
        translate([od/2,0]) scale([stretch,1]) translate([1,0]) rotate([0,0,22.5]) circle(d=od, $fn=8);
}

module internal_eyelet_planar() {
    ringr = manheight/5;
    d = min(3, thickness-rim_height-1.2) / cos(22.5);
    translate([0,ringr-1.25*d+headtop+maxrimoffset,0.5*(thickness-rim_height)])
        rotate([0,0,180+45]) rotate_extrude(angle=90, $fn=64, convexity=4)
            translate([ringr,0]) rotate([0,0,22.5])
                circle(d=d, $fn=8);
}

module internal_eyelet_perp() {
    d = min(3, thickness-rim_height-1.2) / cos(22.5);
    translate([0,headtop+maxrimoffset,0.5*thickness])
        rotate([0,90,180]) rotate_extrude(angle=180, $fn=24, convexity=4)
            translate([manheight/20,0])
                circle(d=d, $fn=16);
}

// Build a polyhedron object from a stack of polygons. It is assumed that each polygon has [x,y,z] coordinates as its vertices, and the ordering of vertices follows the right-hand-rule with respect to the direction of propagation of each successive polygon.
module polyhedron_stack(stack) {
    nz = len(stack); // number of z layers
    np = len(stack[0]); // number of polygon vertices
    facets = [
        // close first opening
        [ for(j=[0:np-1]) j ],
        // define quads for polyhedron body
        for(i=[0:nz-2])
            for(j=[0:np-1]) let(k1=i*np+j, k4=i*np+((j+1)%np), k2=k1+np, k3=k4+np)
                [k1, k2, k3, k4],
        // close last opening
        [ for(j=[np*nz-1:-1:np*nz-np]) j ]
    ];
    polyhedron(flatten(stack), facets, convexity=6);
}

// ---------- functions ----------

// flatten an array of arrays
function flatten(l) = [ for (a = l) for (b = a) b ] ;

// Bezier cubic curve

// get an x,y coordinate of a cubic Bezier curve given 4 x,y control points given in the array p[][]
function bezier_point2d(t, p) = [ // t=0...1, p=array of 4 [x,y] control points
    bezier_coordinate(t, p[0][0],p[1][0],p[2][0],p[3][0]),
    bezier_coordinate(t, p[0][1],p[1][1],p[2][1],p[3][1])
];

// return coordinate of Bezier curve at location t in the interval 0...1
// must be called separately to pass x-, y-, (and z-) coordinate coefficients
function bezier_coordinate(t, n0, n1, n2, n3) = let(t2=t*t, tm=1-t, tm2=tm*tm)
    n0*tm2*tm + 3*n1*t*tm2 + 3*n2*t2*tm + n3*t2*t;

```


[User]
I'd like to create a customizable ruler using OpenSCAD. It should have parameters for length, thickness, and width. I also need to control the length, thickness, and width of the graduation marks. There should be a parameter for a right border, which is basically extra space after the last graduation line on the ruler. I'd like a configurable hole for hanging, and parameters to adjust the font, font size, font thickness (which could be negative for engraving), and spacing of the numbers.

The ruler should have major graduation marks every 10mm, slightly smaller marks every 5mm, and the smallest marks for every 1mm. The major graduation marks should be larger than the 5mm marks, which in turn should be larger than the 1mm marks. I would like the major graduation marks, those at multiples of 10, to also have the value in centimeters printed next to them.

I don't need any fancy libraries; I believe this can be achieved with standard OpenSCAD functions. Can you generate the SCAD code for me?

[Assistant]
ruler.scad:
```
////////////////////////////////////////////////////////////////////////////////
//                                  RULER                                     //
//                               Version 1.0                                  //
//                           BY JULIEN COPPOLANI                              //
//                        julien.coppolani@gmail.com                          //
////////////////////////////////////////////////////////////////////////////////

// This version has been edited to work with thingiverse customizer

// HISTORY
// v1.0 : 2023-12-09 : Initial version

// ALL VALUES ARE IN MILLIMETERS

// IGNORE THIS PARAMETER (IT IS USED FOR CUSTOMIZER TO WORK CORRECTLY)
Test = 0; // [0,1]

// LENGTH OF THE RULER
LENGTH=150; // [10:500]

// THICKNESS OF THE RULER
THICKNESS=1.8; // [0.2:0.2:10]

// WIDTH OF THE RULER
WIDTH=20; // [5:100]

// LENGTH OF THE GRADUATION
GR_LENGTH=4;  // [1:40]

// THICKNESS OF THE GRADUATION
GR_THICKNESS=0.6; //[0.2:0.2:10.2]

// WIDTH OF THE GRADUATION
GR_WIDTH=0.4;  //[0.1:0.1:0.9]

// BORDER ON THE RIGHT (space after the last graduation of the ruler)
RIGHT_BORDER=10; // [0:200]

// HOLE ON THE RIGHT FOR HANGING THE RULER
IS_HOLE="true"; // [true, false]

// FONT
FONT="Arial Black";

// FONT_SIZE
FONT_SIZE=4; // [2:0.1:20]

// FONT DEPTH  (CAN BE NEGATIVE OF POSITIVE)
// NEGATIVE : NUMBERS WILL APPEAR HOLLOW
// POSITIVE : NUMBERS WILL APPEAR EMBOSS
FONT_THICKNESS=0.4; // [-10.2:0.2:10.2]

// FONT_SPACING (impacts numbers >= 10)
FONT_SPACING=0.75; // [0.5:0.05:1.5]

/* [hidden] */
// Full length of the Ruler
length=LENGTH+RIGHT_BORDER;

// Real width of the Ruler
width=(4*GR_LENGTH<WIDTH ? WIDTH : 4*GR_LENGTH);

// Diameter of the fixation hole
hole_dia=width/2.5;

difference()
{
	union()
	{
		cube([length, width, THICKNESS]);
		if (IS_HOLE=="true") {
			translate([length, width/2, 0])
				cylinder(THICKNESS, d=width, $fn=width*5);
		}
		if (FONT_THICKNESS > 0) {
			color([0, 1, 0])
				for (i = [10:10:LENGTH]) {
					translate([i-.1*FONT_SIZE, width/2, THICKNESS])
						linear_extrude(FONT_THICKNESS)
							text(str(i/10), FONT_SIZE, FONT, halign="center", valign="center", spacing=FONT_SPACING);
				}
		}
	}
	for (i = [1:LENGTH]) {
		if (i%10==0) {
			color([0,0,1])
			{
				translate([i-GR_WIDTH/2, -1, THICKNESS-GR_THICKNESS])
					cube([GR_WIDTH, 1+GR_LENGTH*1.8, GR_THICKNESS+1]);
				translate([i-GR_WIDTH/2, width-GR_LENGTH*1.8, THICKNESS-GR_THICKNESS])
					cube([GR_WIDTH, 1+GR_LENGTH*1.8, GR_THICKNESS+1]);
			}
			if (FONT_THICKNESS < 0) {
					color([0, 1, 0])
						translate([i-.1*FONT_SIZE, width/2, THICKNESS+FONT_THICKNESS])
							linear_extrude(-FONT_THICKNESS+1)
									text(str(i/10), FONT_SIZE, FONT, halign="center", valign="center", spacing=FONT_SPACING);
			}
		}
		else if (i%5==0) {
			color([0,0,1])
			{
				translate([i-GR_WIDTH/2, -1, THICKNESS-GR_THICKNESS])
					cube([GR_WIDTH, 1+GR_LENGTH*1.3, GR_THICKNESS+1]);
				translate([i-GR_WIDTH/2, width-GR_LENGTH*1.4, THICKNESS-GR_THICKNESS])
					cube([GR_WIDTH, 1+GR_LENGTH*1.3, GR_THICKNESS+1]);
			}
		}
		else {
			color([0,0,1])
			{
				translate([i-GR_WIDTH/2, -1, THICKNESS-GR_THICKNESS])
					cube([GR_WIDTH, 1+GR_LENGTH, GR_THICKNESS+1]);
				translate([i-GR_WIDTH/2, width-GR_LENGTH, THICKNESS-GR_THICKNESS])
					cube([GR_WIDTH, 1+GR_LENGTH, GR_THICKNESS+1]);
			}
		}
	}
	if (IS_HOLE=="true") {
		translate([length, width/2, -1])
			cylinder(THICKNESS+2, d=hole_dia, $fn=width*3);
	}

}

```


[User]
I'd like to get a parametric OpenSCAD design for a lightweight, customizable spool, primarily for holding filament. The design should allow me to print it in two parts: a bottom/out part and a top/in part, which will then screw together.

Here are the basic parameters I need to control:

*   **Overall Diameter (dout):** The outer diameter of the spool.
*   **Spool Width (h):**  The overall width/height of the spool.
*   **Internal Diameter (midout):** The diameter of the central cylindrical area where the two parts join.
*   **Layer Height (layer):**  The print layer height (used to calculate thicknesses).
*   **Wall Thickness (hwall_mm):** The thickness of the spool walls.
*   **Edge Height (rebroh_mm):** The height of the raised edges on the top/bottom of the spool.
*   **Edge Width (rebrow):** The width of the raised edges.
*   **Number of Spoke Pairs (nspikes):** The number of pairs of spokes that connect the central cylinder and the outer walls.
*   **Number of Filament Holes (nholes):** The number of filament guide holes around the outer edge of the spool.
*   **Filament Hole Diameter (hole_d):** The diameter of the filament guide holes.
*   **Spoke Pair Width (wspike):** The distance between the two spokes in a spoke pair.
*   **Spoke Width (wspike1):**  The width of each individual spoke.
*   **Outer Contour Width (wout):** The width of the outer rim of the spool.
*   **Inner Contour Width (wmid):** The width of the inner rim/cylinder of the spool.

The spool parts should join via a threaded connection. I need the following related parameters:

*  **Midwall:** The thickness of the central connecting cylinder.
*  **Midin:**  The inner diameter of the central connecting cylinder.
*  **Rezba_deep:** The depth of the threads on the connecting parts.
*  **Rezba_zapas:** A safety margin to add to the thread calculation.
*  **Tolerance:** A tolerance value to account for printer variations.
*  **Rod Diameter (rodd):** The calculated diameter for the male thread.

The design should have an option to generate three different outputs:

1.  **Both Parts:** Generate both the bottom/out and the top/in parts together, positioned such that they'd be ready to be assembled, like in the provided example file
2.  **Bottom/Out Part:** Generate only the bottom/out part of the spool, including the inner female thread.
3.  **Top/In Part:** Generate only the top/in part of the spool, including the male thread.

I'd like to use the `BOSL2` library, including `std.scad` and `screws.scad`. I anticipate needing those for the threaded connection and other common functions.

[Assistant]
spool.scad:
```
////////////////////////////////////////////////
//////// Customizable Lightweight Spool ////////
////////////////////////////////////////////////

include <BOSL2/std.scad>
include <BOSL2/screws.scad>

/* [Thing] */
// 0 - all, 1 - bottom/out, 2 - top/in
PRINT_PARTNO=0; // [0, 1, 2]

/* [Size] */
//  Out Spool Diamater
dout = 205;
// Spool Width
h=58;
// Internal Spool Diameter
midout=80;

/* [Stifness] */
// Print layer size
layer = 0.24;
// Spool thickness
hwall_mm = 0.96;
// Edge height
rebroh_mm = 2.64;
// Edge width
rebrow=1.6;

/* [Design] */
// Number of Spoke Pairs
nspikes=5;
// Number of Filament Holes around the spool
nholes=25;
// Filament Holes Diameter
hole_d=3.5;
// Distance between spokes within a pair
wspike=30;
// Spoke width
wspike1=7;
// Outside Contour Width
wout = 12;
// Inside Contour Width
wmid = 8;

/* [Hidden] */
eps=0.01;
$fn = 180;

midwall=1.6;
midin=midout-midwall*2;
rezba_deep = 4;
rezba_zapas = 0;
tolerance = 1.3;
rodd = midin-rezba_deep - rezba_zapas;

hwall= round(hwall_mm/layer)*layer;
rebroh = round(rebroh_mm/layer)*layer;

module bottom2d(PRINT_PART) {
difference() {
union(){
difference() {
	circle(d=dout);
	circle(d=dout-wout*2);
}
difference() {
	circle(d=midout+wmid*2);
	circle(d=PRINT_PART==1 ? midout-eps : rodd);
}
for(i=[0:nspikes-1])
	rotate([0,0,360*i/nspikes])
	translate([midout/2,-wspike/2])
		difference() {
		square([(dout-midout)/2 - wout/2, wspike]);
		offset(r=-wspike1)
		square([(dout-midout)/2 - wout/2, wspike]);
		}
}
}
}

module holes() {
for(i=[0:nholes-1]) rotate([0,0,360*i/nholes])translate([(dout-wout)/2,0]) circle(d=hole_d, $fn=30);
}

module main(PRINT_PART) {

	linear_extrude(hwall)
	difference() {
		bottom2d(PRINT_PART);
		holes();
	}

	translate([0,0,hwall-eps])
	linear_extrude(rebroh)
	difference() {
		bottom2d(PRINT_PART);
		offset(r=-rebrow) bottom2d(PRINT_PART);
	}

if (PRINT_PART==1) {
	difference() {
		translate([0,0,eps/2])
		cylinder(d=midout, h=h-eps);
		translate([0,0,h/2])
			threaded_rod(d=[midin-rezba_deep, midin-rezba_deep, midin], l=h+eps, pitch=8, starts=3, internal=true, $fn=360, $slop=tolerance/4);
			translate([0,0,12.5]) rotate([0,90,0])
			cylinder(d=2.5, h=midout/2+eps);
			translate([0,0,8.5]) rotate([0,-90,0])
			cylinder(d=2.5, h=midout/2+eps);
	}
}

if (PRINT_PART==2) {
	difference() {
		translate([0,0,h/2])
		threaded_rod(d=[midin-rezba_deep-rezba_zapas, midin-rezba_deep-rezba_zapas, midin-rezba_zapas], l=h, pitch=8, starts=3, internal=false, $fn=360, $slop=tolerance/4);
		translate([0,0,-eps/2])
		cylinder(d=rodd-midwall*2,h=h+eps);
	}
}

}

if (PRINT_PARTNO==1) main(1);
if (PRINT_PARTNO==2) main(2);
if (PRINT_PARTNO==0) {
	main(1);
	translate([dout+5, 0, 0])
		main(2);
}

```


[User]
Hey, I'm looking to get a parametric battery box designed in OpenSCAD. I need something that can hold multiple rows of different types of batteries, all at a 45 degree angle. I've got some ideas about the features, and want to make sure I can customize them in the OpenSCAD Customizer.

Here's what I'm thinking:

**General:**

*   I need to be able to set a `Battery_Padding` value, which adds extra space to the battery cutout diameters (x and y only, not z) to make for easier fits.
*   I need to set a `Wall_Thickness` for all the surfaces.
*   I'd like an option for edge treatments. This would be a variable called `Edge_Type` which has the options "Bevel", "Rounded", and "None".
*   If I select "Bevel" or "Rounded", I need an additional parameter `Edge_Size` to control the size of that edge treatment which adds to the overall thickness.

**Mounting Points:**

*   I need a `Mount_Hole_Size` to define the diameter of mounting holes.
*   I want to control how many mounting tabs are on the top, bottom, and sides. I'll need three variables: `Mounts_Top`, `Mounts_Bottom`, and `Mounts_Side`. These should accept values from 0 to 5 (inclusive).
*   There should also be a `mountThickness` variable so that I can control the thickness of the flat mount tab.

**Battery Rows and Counts:**

*   This is where it gets more complex. I'll need to define up to nine rows of batteries. Each row needs two variables: `Row[N]_Type` and `Row[N]_Count`, where `[N]` is the row number (1 to 9).
*   The `Row[N]_Type` should have a dropdown to select the type of battery. I'd like options for AAA, AA, C, D, 9VOLT, CR123A, CR2, and an option called "ignore row". I'd like this to be represented as an integer in the code, such as 0:AAA, 1:AA, 2:C, 3:D, 4:9VOLT, 5:CR123A, 6:CR2, 7:ignore row.
*   The `Row[N]_Count` should be a slider that allows me to select how many of the selected battery type I want in the row (from 1 to 50).

**Other:**

*   I need the battery box to be designed so that it stores the batteries at a 45-degree angle to the base, like the examples in the description.
*   I do not want you to rely on pre-existing libraries in your design, I want to be able to put all of this into a single .scad file.

I think that covers everything. Let me know if you have any questions.

[Assistant]
Parametric_Battery_Box_-_Second_Edition_-_v1.scad:
```
//////////////////////////
//Parameters
//////////////////////////

/* [General settings] */

//Extra added to battery cutout diameters to make for easier fits
Battery_Padding = 1;
//Padding is only applied to X and Y battery dimensions, not Z
//How thick surfaces are
Wall_Thickness = 1;

/* [Edges] */
//Type of edge, if any
Edge_Type = "Bevel"; //[Bevel, Rounded, None]
//Size of edge (added to Wall_Thickness)
Edge_Size = 2;

/* [Mounting Points] */
//Size of the opening for the screw to pass through
Mount_Hole_Size = 4.3;
//How many mounting points on the top
Mounts_Top = 1; //[0,1,2,3,4,5]
//How many mounting points on the bottom
Mounts_Bottom = 1; //[0,1,2,3,4,5]
//How many mounting points on the sides
Mounts_Side = 1; //[0,1,2,3,4,5]
//How thick the flat mount tab is (recommend making it as thick as you can get it without needing infill)
mountThickness = 0.8;

/* [Battery rows and counts] */
Row1_Type  = 0; // [0:AAA,1:AA,2:C,3:D,4:9VOLT,5:CR123A,6:CR2,7:ignore row]
Row1_Count = 8; // [1:50]

Row2_Type  = 0; // [0:AAA,1:AA,2:C,3:D,4:9VOLT,5:CR123A,6:CR2,7:ignore row]
Row2_Count = 8; // [1:50]

Row3_Type  = 1; // [0:AAA,1:AA,2:C,3:D,4:9VOLT,5:CR123A,6:CR2,7:ignore row]
Row3_Count = 6; // [1:50]

Row4_Type  = 1; // [0:AAA,1:AA,2:C,3:D,4:9VOLT,5:CR123A,6:CR2,7:ignore row]
Row4_Count = 6; // [1:50]

Row5_Type  = 7; // [0:AAA,1:AA,2:C,3:D,4:9VOLT,5:CR123A,6:CR2,7:ignore row]
Row5_Count = 4; // [1:50]

Row6_Type  = 7; // [0:AAA,1:AA,2:C,3:D,4:9VOLT,5:CR123A,6:CR2,7:ignore row]
Row6_Count = 4; // [1:50]

Row7_Type  = 7; // [0:AAA,1:AA,2:C,3:D,4:9VOLT,5:CR123A,6:CR2,7:ignore row]
Row7_Count = 4; // [1:50]

Row8_Type  = 7; // [0:AAA,1:AA,2:C,3:D,4:9VOLT,5:CR123A,6:CR2,7:ignore row]
Row8_Count = 4; // [1:50]

Row9_Type  = 7; // [0:AAA,1:AA,2:C,3:D,4:9VOLT,5:CR123A,6:CR2,7:ignore row]
Row9_Count = 4; // [1:50]

//If you go to add more rows, be sure to add them to rowTypeList_all and numOfRowsList_all!!!
//If you go to add batter types, be sure to make "ignore row" the last option, and to make sure index #s match batterySizes

// Ends params visible in customizer
module endVisibleParams(){} endVisibleParams();

//////////////////////////
//Hard coded or sensitive parameters
//////////////////////////

//Battery sizes. Each has a name, shape type, x/y/z
//The indexes provided by Row1_Type-Row9_Type corespond to this table
//Padding parameter will be applied to the X and Z measurements but not Z
batterySizes = [
    //AAA
    [
        "AAA",
        "cylinder",
        [10.5, 10.5, 44.5]
    ],
    //AA
    [
        "AA",
        "cylinder",
        [14.5, 14.5, 50.5]
    ],
    //C
    [
        "C",
        "cylinder",
        [26.2, 26.2, 50]
    ],
    //D
    [
        "D",
        "cylinder",
        [34.2, 34.2, 61.5]
    ],
    //9VOLT
    [
        "9VOLT",
        "cuboid",
        [17.5, 26.5, 48.5]
    ],
    //CR123A
    [
        "CR123A",
        "cylinder",
        [17, 17, 34.5]
    ],
    //CR2
    [
        "CR2",
        "cylinder",
        [15.6, 15.6, 27]
    ]
];

// Take customizer row data and format it so loops can read it
//All type and counts
rowTypeList_all = [Row1_Type,Row2_Type,Row3_Type,Row4_Type,Row5_Type,Row6_Type,Row7_Type,Row8_Type,Row9_Type];
numOfRowsList_all = [Row1_Count,Row2_Count,Row3_Count,Row4_Count,Row5_Count,Row6_Count,Row7_Count,Row8_Count,Row9_Count];
//Number of total possible entries
maxRows = len(rowTypeList_all);

//Create filtered version of type and count list combined into [type,count],[type,count],etc
//Use -2 to maxRows to account for indexes starting at 0 AND wanting to exclude the last bat type (ignore row)
rowDataList = [for (i = [0:maxRows-1])
    if (rowTypeList_all[i] < maxRows-2)
        [rowTypeList_all[i],numOfRowsList_all[i]
    ]
];
//Count the rows (we'll use the # a lot I think)
numOfRows = len(rowDataList);

//Create individual lists, 1 entry per row, for sizes, # of batteries, etc
//This is done to ensure various times we use measurements, like position + sizing, they are the same
//How many in each row
rowBatCountList = [for(i=[0:numOfRows-1]) rowDataList[i][1] ];
//Name of bat types in each row
rowBatNameList = [for(i=[0:numOfRows-1]) batterySizes[rowDataList[i][0]][0] ];
//Shape of battery in each row
rowBatShapeList = [for(i=[0:numOfRows-1]) batterySizes[rowDataList[i][0]][1] ];
//Pure sizes of each battery in each row
rowBatSizeList = [for(i=[0:numOfRows-1]) batterySizes[rowDataList[i][0]][2] ];
//Padded sizes (X and Y only) in each row
rowBatPaddedSizeList = [for(i=[0:numOfRows-1]) rowBatSizeList[i] + [Battery_Padding,Battery_Padding,0]];
//Y positioning offsets for each row, doesn't include wall depth spacing
rowBatBasicYOffsetList = [for(i=[0:numOfRows-1]) angled(rowBatPaddedSizeList[i].y*2)];
//Total X width of each row's batteries, including padding & walls
rowBatMaxWidth = [for (i = [0:numOfRows-1])
    let(
        //# of bats in this row
        batCount = rowBatCountList[i],
        //width (x) of bat
        batWidth = rowBatPaddedSizeList[i].x * batCount,
        //Thickness of a single wall between bats
        interiorWalls = Wall_Thickness * (batCount-1),
        //Thickness of outter walls (1 on each end)
        exteriorWalls = Wall_Thickness * 2
    )
    //How wide a row of bats is end-to-end
    batWidth +  interiorWalls + exteriorWalls
];

//Support bracker thickness
mountBrackerThickness = 2;
//Size of mount, based on hole
mountBracketX = Mount_Hole_Size*4;
mountBracketY = Mount_Hole_Size*3;

//Epsilon, tiny measurement for offsetting surfaces to avoid overlap during difference
eps = 0.007;
//Level of detail for circles
$fn = 32;

//////////////////////////
//Logic - determine what to build
//////////////////////////

if (numOfRows > 0){
    create_batBox();
}

//////////////////////////
//Create - create a whole model piece made of parts
//////////////////////////

//Make the battery box shape
module create_batBox(){
    union(){
        difference(){
            //Box shape
            part_box();
            //Battery cutouts
            part_batteryCutouts();
            //Edges, if any
            if (Edge_Type == "Bevel"){
                part_edgeBevel();
            }
            else if (Edge_Type == "Rounded"){
                part_edgeRounded();
            }
        }
        //Brackets (will create nothing if count = 0)
        part_brackets_sides();
        part_brackets_top();
        part_brackets_bottom();
    }
}

//////////////////////////
//Parts - Individual conceptual elements that make up a model
//////////////////////////

//Create tube given width/depth/height
module part_cylinderCutout(size){
    y = -angled(size.y/2) - angled(size.y) + angled(size.z);
    z = -angled(size.y/2) + angled(size.z);

    translate([0,y,-z])
    rotate([45,0,0])
    linear_extrude(size.z)
    resize([size.x, size.y])
    circle(d=1);
}

//Create tube given width/depth/height
module part_cuboidCutout(size){
    y = -angled(size.y/2) - angled(size.y) + angled(size.z);
    z = -angled(size.y/2) + angled(size.z);

    translate([0,y,-z])
    rotate([45,0,0])
    linear_extrude(size.z)
    resize([size.x, size.y])
    square(1, center=true);
}

//Create cutouts for batteries, all rows
module part_batteryCutouts(){
    //Loop over the rows of batteries to create and trigger their creation
    for (rowIndex = [0 : numOfRows-1]){ //numOfRows-1]){
        //Battery counts/name/shape/size
        batTypeIndex = rowDataList[rowIndex][0];
        batCount = rowBatCountList[rowIndex];
        batName = rowBatNameList[rowIndex];
        batShape = rowBatShapeList[rowIndex];
        batSize = rowBatSizeList[rowIndex];
        batSizePadded = rowBatPaddedSizeList[rowIndex];
        //Width (X) measurements, battery/entire row
        batWidthWithPadAndWall = batSizePadded.x + (Wall_Thickness*2);///////////////////////////////
        rowTotalWidth = rowBatMaxWidth[rowIndex];
        //Depth (Y) measurements
        wallYThicknessSoFar = Wall_Thickness*rowIndex;
        batYBatThicknessSoFar = addRange(rowBatBasicYOffsetList,0,rowIndex);
        yCenteringOffset = getOverallY_NoEdge()/2;
        batYDepthSoFar = batYBatThicknessSoFar + wallYThicknessSoFar - yCenteringOffset;

        //Loop over batteries in a row and create/position them
        for (batIndex = [0: batCount-1]){ //batCount-1]){
            //Additional Y offset so bat bottom of first row is on the 0 line
            //translate([0,angled(rowBatPaddedSizeList[0].z - rowBatPaddedSizeList[0].y),0])
            //X & Y offsets applied
            translate([-(rowTotalWidth/2 - batWidthWithPadAndWall/2),batYDepthSoFar,0]){
                //X position, spacing the cells of the row apart
                xPos = batSizePadded.x + Wall_Thickness;
                yPos = 0;
                //Lay out cells on x and y
                translate([xPos*batIndex,yPos*batIndex,0])
                //Create battery (different func = different shape
                if (batShape=="cylinder"){
                    part_cylinderCutout(batSizePadded);
                } else if (batShape=="cuboid"){
                    part_cuboidCutout(batSizePadded);
                }
            }
        }
    }
}

//Create box that battery slots are cut into
module part_box(){
    x = getOverallX();
    y = getOverallY();
    z = getOverallZ();

    translate([0,0,-z])
    linear_extrude(z)
    square([x,y], center=true);
}

//Create triangle shapes for cutouts to created beveled edges
module part_edgeBevel(){
    x = getOverallX();
    y = getOverallY();

    union(){
        //Top/Bottom bevel
        translate([0,-y/2,0])
        part_edgeBevelShape(x, 0);
        translate([0, y/2,0])
        part_edgeBevelShape(x, 180);
        //Left/Right bevel
        translate([ x/2,0,0])
        part_edgeBevelShape(y, 90);
        translate([-x/2,0,0])
        part_edgeBevelShape(y, 270);
    }
}

//Create shape usable to create bevels
module part_edgeBevelShape(length, angle){
    //Rotate
    rotate([0,90,angle])
    //Extrude and position to 0, based on angle degree given
    translate([0,0,-length/2-eps/2])
    linear_extrude(length+eps)
    //2d shape, centered to 0 (slight eps to make clean cuts
    rotate([0,0,45])
    square(sin(45)*Edge_Size*2+(eps*2), center=true);
}

//Create concave rounded shapes for cuttouts to create rounded edges
module part_edgeRounded(){
    x = getOverallX();
    y = getOverallY();

    union(){
        //Top/Bottom bevel
        translate([0,-y/2,0])
        part_edgeRoundedShape(x, 0);
        translate([0, y/2,0])
        part_edgeRoundedShape(x, 180);
        //Left/Right bevel
        translate([ x/2,0,0])
        part_edgeRoundedShape(y, 90);
        translate([-x/2,0,0])
        part_edgeRoundedShape(y, 270);
    }
}

//Create shape usable to create rounded edge
module part_edgeRoundedShape(length, angle){
    //Rotate
    rotate([0,90,angle])
    //Extrude and position to 0, based on angle degree given
    translate([0,0,-length/2-eps/2])
    linear_extrude(length+eps)
    //2d shape
    difference(){
        //square
        square(Edge_Size*2 + eps, center=true);
        //circle cutout of square
        translate([Edge_Size, Edge_Size,0])
        circle(d=Edge_Size*2+eps);
    }
}

//Create an individual bracket, aligned to the edge
module part_bracket(){
    translate([0,mountBracketY/2,0]){
        //Flat part of bracket
        linear_extrude(mountThickness)
        difference(){
            square([mountBracketX,mountBracketY], center=true);
            circle(d=Mount_Hole_Size);
        }
        //Support for bracket
        difference(){
            //Shape for support
            translate([mountBracketX/2, -mountBracketY/2, mountThickness])
            rotate([0,-90,0])
            linear_extrude(mountBracketX)
            polygon([
                [0,0],
                [0,mountBracketY],
                [mountBracketY/2,0]
            ]);
            //Cutout in middle of support
            linear_extrude(mountBracketY + mountThickness + eps)
            square([mountBracketX-mountBrackerThickness*2,mountBracketX+eps], center=true);
        }
    }
}

//Create brackets on sides, if any
module part_brackets_sides(){
    if (Mounts_Side > 0){
        for (i=[0:Mounts_Side-1]){
            //Calculate positioning across
            overallY = getOverallY();
            zstartPoint = overallY/2 + mountBracketX/2;
            distanceBetween = abs(zstartPoint*2);
            spacing = distanceBetween / (Mounts_Side+1);
            yOffset = zstartPoint - (spacing * (i+1));

            //Calculate positioning to top edge
            xOffset = -getOverallX()/2;
            zOffset = -getOverallZ();

            //Place
            //Right
            translate([xOffset,yOffset,zOffset])
            rotate([0,0,90])
            part_bracket();
            //Left
            translate([-xOffset,yOffset,zOffset])
            rotate([0,0,-90])
            part_bracket();
        }
    }
}

//Create brackets on top, if any
module part_brackets_top(){
    if (Mounts_Top > 0){
        for (i=[0:Mounts_Top-1]){
            //Calculate positioning across
            overallX = getOverallX();
            zstartPoint = overallX/2 + mountBracketX/2;
            distanceBetween = abs(zstartPoint*2);
            spacing = distanceBetween / (Mounts_Top+1);
            xOffset = zstartPoint - (spacing * (i+1));

            //Calculate positioning to top edge
            yOffset = -getOverallY()/2;
            zOffset = -getOverallZ();

            //Place
            translate([xOffset,yOffset,zOffset])
            rotate([0,0,180])
            part_bracket();
        }
    }
}

//Create brackets on bottom, if any
module part_brackets_bottom(){
    if (Mounts_Bottom > 0){
        for (i=[0:Mounts_Bottom-1]){
            //Calculate positioning across
            overallX = getOverallX();
            zstartPoint = overallX/2 + mountBracketX/2;
            distanceBetween = abs(zstartPoint*2);
            spacing = distanceBetween / (Mounts_Bottom+1);
            xOffset = zstartPoint - (spacing * (i+1));

            //Calculate positioning to bottom edge
            yOffset = getOverallY()/2;
            zOffset = -getOverallZ();

            //Place
            translate([xOffset,yOffset,zOffset])
            part_bracket();
        }
    }
}

//////////////////////////
//Functions - helper functions to tidy up code
//////////////////////////

// Get length if length is angled. Creates easier-to-read formulas
function angled(length) = length * sin(45);

// From: https://en.wikibooks.org/wiki/OpenSCAD_User_Manual/Tips_and_Tricks#Add_all_values_in_a_list
// Sum elements in list
function add(v, i=0, r=0) = i < len(v) ? add(v, i + 1, r + v[i]) : r;

// Add indexes in a given range only
function addRange(list, i_start, i_end) = add([for (i=[i_start:i_end]) list[i]])  ;

//Get the overall X width of the box. Doesn't include hangers, does include walls
function getOverallX() = Edge_Type=="None" ? max(rowBatMaxWidth) : max(rowBatMaxWidth) + (Edge_Size*2);

//Calculate how much area the batteries take in the Y axis (doesn't include hangers, does include walls)
//Uses the length of the last row of batteries, assuming no poin will be further from 0
//But this could be fasle is second to last row had very long batteries
//I ignored that, cause battery length doesn't tend to waver drastically.
//But if you add custom sizes batteries, it could. So heads up I guess
function getOverallY() =
    let(
        depth_FirstBatUnder = angled(rowBatPaddedSizeList[numOfRows-1].z - rowBatPaddedSizeList[numOfRows-1].y),
        depth_AllBatOver = add(rowBatBasicYOffsetList),
        depth_AllWallOver = Wall_Thickness * (numOfRows+1),
        depth_Edge = Edge_Type=="None" ? 0 : Edge_Size * 2
    )
    depth_FirstBatUnder + depth_AllBatOver + depth_AllWallOver + depth_Edge;

//Get the deepest X depth then add Wall_Thickness to it, to get deepest z point
function getOverallZ() = max( [for (i=[0:numOfRows-1]) angled(rowBatPaddedSizeList[i].z)]) + Wall_Thickness;

//Get the Total length the cutouts take up in the Y axis, without adding edges
function getOverallY_NoEdge() =
    let(
        depth_FirstBatUnder = angled(rowBatPaddedSizeList[numOfRows-1].z - rowBatPaddedSizeList[numOfRows-1].y),
        depth_AllBatOver = add(rowBatBasicYOffsetList),
        depth_AllWallOver = Wall_Thickness * (numOfRows-1)
    )
    depth_FirstBatUnder + depth_AllBatOver + depth_AllWallOver;

```


[User]
I need some OpenSCAD code to generate Picatinny rails, and I want it to be flexible enough to use in different projects, and I also want to be able to easily create a stand-alone rail. I'm thinking I need a library to define the basic rail, and then another file that uses that library to make a customizable standalone rail.

For the library, I need a module that can create a Picatinny rail on the XY plane, going up the Y axis, with the top of the rail in the Z direction.  I want it to be based on the STANAG 4694 dimensions, but with metric measurements, since that's what's usually used in 3D printing. I need to be able to adjust the tolerances for my printer. The library should just define a module, `picatinny_rail`, and a function, `picatinny_rail_version`, and keep the rest of the namespace clear.

The `picatinny_rail` module should accept the following parameters, all of which should be optional:

*   `length` (or `l`): A number to specify the length of the rail. If this isn't given, the length should be calculated automatically based on the number of slots and alignment.
*   `number` (or `n`): A non-negative integer to set the number of recoil slots. If this isn't given, it should be calculated from the length. If neither length nor number are specified, a default of 75mm length and 7 slots should be used.
*   `drop` (or `d`): A number to extend the base of the rail below the XY plane. This should default to 0.
*  `chamfer` (or `c`): A number for chamfering the ends of the rail. This should default to 0.
*   `alignment` (or `a`): Controls the position of the recoil slots.  It can be "auto" (or unspecified), where slots are placed automatically ignoring screw ports. It can be a number, where the first slot is offset by that distance from the start of the rail. It can be "slot", where the slots align with the first screw, or "ridge", where the ridges align with the first screw.
*   `screw_positions` (or `sp`): A vector to define the positions of screw ports, measured from the start of the rail. It should default to an empty vector.
*   `screw_type` (or `st`): A number to specify the type of screw. If it's a positive number, it should create a hole for a metric hex socket head cap screw. If it's negative, it should create a hole for a metric hex socket countersunk head screw. The module should interpolate between known metric screw sizes.  The default is 4, for an M4 hex socket head screw.
*   `screw_clearance` (or `sc`): A number to set the clearance around the screw.  The default is 0.25.
*   `omit_slots_near_screws` (or `os`): If true (the default), slots near screw posts should be omitted. If false, no slots will be omitted. If a positive number, slots whose centers are within that distance of the center of a screw should be omitted.

The other file I need should be a customizer file that uses the library to create a standalone rail. It should have the ability to adjust the same options as the library. The customizer file should have a section for "Rail dimensions" with sliders for "Number of recoil slots" and "Length." There should be a section for "Screw ports: what and where" with a checkbox to include screw ports, a textbox for "Screw positions" (that accepts a comma separated list of numbers), a dropdown for "Screw type" ("Metric hex socket head" or "Metric hex countersunk"), a dropdown for "Metric screw size", and a slider for "Screw clearance". There should also be a section for "Screw ports: how they affect slots" with a dropdown for "Slot alignment" ("Automatic", "Slot on first screw", or "Ridge on first screw"), a dropdown for "Omit slots near screws" ("Yes (auto threshold)", "Yes (manual threshold)", or "No"), and a slider for a "Threshold" for omitting slots. Finally there should be a section for "Miscellaneous" with sliders for "Drop" and "Chamfer" and a checkbox for "Force render during preview", and "Disregard all that and just show me examples." I'm not sure exactly how to write those customizers, so I'd appreciate it if you could make it for me.

I don't need any other external libraries (MCAD, BOSL, etc).

[Assistant]
picatinny-rail.scad:
```

//       What's this?

// This file defines a module that creates a Picatinny rail on the xy plane, running up the y axis from the origin, with the top in the z-direction. I'm using dimensions from standardization agreement 4694. This is the same as an original Picatinny rail except that the dimensions are metric (standard for 3d printing anyways) and the tolerances are different (but those depend on your printer anyways).

//       Usage

// There are two intened uses for this: to put rails in your own designs, and to create standalone rails.

// If you want to incorporate rails into your designs, the easiest way to do that is to use this as a library. Place this document wherever you normally install OpenSCAD libraries on your system (or just in the same directory as your project), type "use<Picatinny rail>;" into your project, and use the picatinny_rail module where you want a rail. This will only define a picatinny_rail module and a picatinny_rail_version function - it leaves your namespace clear.

// If you want standalone rails then you'll probably want to use Picatinny_customizer.scad, which should be in the same download as this file and includes its own comments at the beginning of the file explaining how to use it.

//       Parameters

// This module accepts these parameters, none of which are mandatory and all of which can be set by a short synonym:

// "length" or "l" is a number which sets the length of the rail. If this is unspecified, a length will be automatically set based on the number of slots and on alignment.

// "number" or "n" is a non-negative integer which sets the number of recoil slots. If this is unspecified, the number of slots will be automatically set based on length. (If both are unspecified, the default is a length of 75mm with 7 slots.)

// "drop" or "d" is a number which extends the base of the rail below the xy plane, which is useful for putting a rail onto something without zero-width gaps (or just making an extra-tall rail). The default is 0.

// "chamfer" or "c" is a number which creates a chamfer at the ends of the rail. The default is 0.

// "alignment" or "a" controlls the position of the recoil slots. If "auto" (or unspecified), the slots are placed automatically in a way that ignores screw ports if they are present (see below). If set to a number, the offset of the first slot is that length (measured from the start of the rail to the middle of the slot). If set to "slot" the slots will automatically align with the first screw. If set to "ridge" the ridges between the slots will automatically align with the first screw. (That's the first screw listed in the "screw_positions" vector, not necesarily the one closest to the beginning of the rail.)

// "screw_positions" or "sp" is a vector of any length which defines the position of the screw ports. Each element in the vector is the position of a screw port, measured from the start of the rail, positioned allong the centerline of the rail. The default is an empty vector, which results in no screw ports.

// "screw_type" or "st" is a number which sets the type of screw used to hold the rail down. If this is a positive number, a hole apropriate for a metric hex socket head cap screw of that size will be made. If this is negative, a metric hex socket countersunk head screw will be used instead. (If the number isn't a recognized metric screw size, this module will linearly interpolate between the closest ones.) The default is an m4 hex socket head screw.

// "screw_clearance" or "sc" is a number which sets the clearance around the screw. The default is 0.25.

// "omit_slots_near_screws" or "os" can casue slots near to screw posts to be omitted. If set to true (the default), the module chooses which slots to omit based on slot width and screw size. If set to false, no slots will be omitted. If set to a positive number, slots whose center are within that distance of the center of a screw will be omitted.

function picatinny_rail_version() = 2.1;

module picatinny_rail(
    length = undef, l = undef,
    number = undef, n = undef,
    drop = undef, d = undef,
    chamfer = undef, c = undef,
    alignment = undef, a = undef,
    screw_positions = undef, sp = undef,
    screw_type = undef, st = undef,
    screw_clearance = undef, sc = undef,
    omit_slots_near_screws = undef, os = undef
){

//---------------------------------------------------------
//
//		Dimensions

// from STANAG 4694

	inner_box_width = 19.05;
	inner_box_height = 2.74;

	bounding_box_width = 21.2;
	bounding_box_toprise = 4.17;
	bounding_box_height = 9.4;

	stem_width = 15.6;

	recoil_depth = 3;
	recoil_width = 5.35;
	recoil_spacing = 10;

	diamond_box_height = bounding_box_height - bounding_box_toprise + inner_box_height/2;
	diamond_box_dimension = (inner_box_width + inner_box_height)/sqrt(2);

// Chosen

   minimum_alignment = recoil_width/2 + 4;
   default_alignment = 7.5;
   default_number = 7;
   default_screw_type = 4;

//---------------------------------------------------------
//
//		Process specifications

// Collate specifications. Everything except for length, number, and alignment can be set directly from specifications.

function read(longname, shortname, default) =
    longname != undef ? longname : shortname != undef ? shortname : default;

l1 = read(length, l, undef);
n1 = read(number, n, undef);
d0 = read(drop, d, 0);
c0 = read(chamfer, c, 0);
a1 = read(alignment, a, undef);
sp0 = read(screw_positions, sp, []);
st0 = read(screw_type, st, 4);
sc0 = read(screw_clearance, sc, 0.25);
os0 = read(omit_slots_near_screws, os, true);

// Sanity-check

if(is_num(n1) && is_num(l1))
    if((n1 - 1) * recoil_spacing > l1){
    echo("Oops! Picatinny rail was called with a specified length and number of slots, but there's no way that many slots will fit in that length.");
};

if(is_string(a1))
    if(a1 != "slot" && a1 != "ridge" && a1 != "auto"){
    echo("Oops! Picatinny rail was called with a specified alignment that's an unrecognized string. This may be a typo.");
};

if(is_string(a1))
    if((a1 == "slot" || a1 == "ridge") && len(sp0) == 0){
    echo("Oops! Picatinny rail was called with an alignment option which references screw port positions, but no screw port positions were defined.");
};

// Set alignment, based on ...
a0 =

    // ... specification?
    is_num(a1) ? a1 :

    // ... slot alignment?
    a1 == "slot" && len(sp0) > 0 ? ((sp0[0] - minimum_alignment + recoil_spacing) % recoil_spacing) + minimum_alignment :

    // ... ridge alignment?
    a1 == "ridge" && len(sp0) > 0 ? ((sp0[0] - minimum_alignment + 1.5 * recoil_spacing) % recoil_spacing) + minimum_alignment :

    // ... length and number?
    is_num(l1) && is_num(n1) ? (l1 - recoil_spacing * (n1-1))/2 :

    // ... just length?
    is_num(l1) ? ((l1 - 2 * minimum_alignment) % recoil_spacing)/2 + minimum_alignment :

    // ... default (which is the same as what "just number" would be).
    default_alignment;

// Set number, based on ...
n0 =

    // ... specification?
    is_num(n1) ? n1 :

    // ... length (and alignment, which we just found)?
    is_num(l1) ? floor((l1 - a0 - minimum_alignment)/recoil_spacing) + 1 :

    // ... default.
    default_number;

// Set length, based on ...
l0 =

    // ... specification?
    is_num(l1) ? l1 :

    // ... alignment and number.
    recoil_spacing * (n0 - 1) + 2 * a0;

//---------------------------------------------------------
//
//		Screw plugs

// Known values

// https://boltsparts.github.io/en/parts/names/MetricHexSocketHeadCapScrew.html
// https://boltsparts.github.io/en/parts/names/MetricHexSocketCountersunkHeadScrew.html

known_sizes = [
    // Key name, head dia, head depth
    // Countersunk
    [-24, 39, 14],
    [-22, 36, 13.1],
    [-20, 36, 8.5],
    [-18, 33, 8],
    [-16, 30, 7.5],
    [-14, 27, 7],
    [-12, 24, 6.5],
    [-10, 20, 5.5],
    [-8, 16, 4.4],
    [-6,12, 3.3],
    [-5, 10, 2.8],
    [-4, 8, 2.3],
    [-3, 6, 1.7],
    [-2.5, 5, 1.5],
    [-2, 4, 1.2],
    // Socket
    [2, 3.8, 2],
    [2.5, 4.5, 2.5],
    [3, 5.5, 3],
    [4, 7, 4],
    [5, 8.5, 5],
    [6, 10, 6],
    [8, 13, 8],
    [10, 16, 10],
    [12, 18, 12],
    [14, 21, 14],
    [16, 24, 16],
    [18, 27, 18],
    [20, 30, 20],
    [22, 33, 22],
    [24, 36, 24]
];

// Useful functions

function linear_interpolate(start, end, valuestart, valueend, x) =
    start == end ?
    valuestart :
    (x - start) * (valueend-valuestart) / (end - start)
    + valuestart;

function lower_bound(m, k=len(known_sizes)-1) =
    known_sizes[k][0] <= m ? k : lower_bound(m, k-1);

function upper_bound(m, k=0) =
    known_sizes[k][0] >= m ? k : upper_bound(m, k+1);

function interpolating_read(key, paramiter) =
    linear_interpolate(
        start = known_sizes[lower_bound(key)][0],
        end = known_sizes[upper_bound(key)][0],
        valuestart = known_sizes[lower_bound(key)][paramiter],
        valueend = known_sizes[upper_bound(key)][paramiter],
        x = key
    );

// Dimension-finding functions

function hole_dia() =
    // Custom size?
    is_list(st0) ?
    st0[0] + 2 * sc0 :
    // Interpolated size?
    abs(is_num(st0) ? st0 : default_screw_type) + 2 * sc0;

function head_dia() =
    // Custom size?
    is_list(st0) ?
    st0[1] + 2 * sc0 :
    // Interpolated size
    interpolating_read(is_num(st0) ? st0 : default_screw_type, 1) + 2 * sc0;

function head_depth() =
    // Custom size?
    is_list(st0) && len(st0) > 2 ?
    st0[2] + sc0 :
    // Interpolated size
    interpolating_read(is_num(st0) ? st0 : default_screw_type, 2);

//---------------------------------------------------------
//
//		Is this slot OK?

removal_threshold =
    is_num(os0) ? os0 :
    head_dia()/2 + recoil_width/2;

function too_close(slot, screw) =
    abs(a0 + slot * recoil_spacing - sp0[screw]) < removal_threshold;

function is_OK(slot, screw = len(sp0)-1) =
    os0 == false ? true :
    screw < 0 ? true :
    too_close(slot, screw) ? false :
    is_OK(slot, screw-1);

//---------------------------------------------------------
//
//		Parts

// Basic shape

module bounding_box(){
    translate([-bounding_box_width/2, 0, -d0])
    cube([bounding_box_width, l0, bounding_box_height + d0]);
   };

module chamfer_plugs(){

   translate([0, 0, bounding_box_height - c0])
   rotate([-45, 0, 0])
   translate([0, -bounding_box_width, 0])
   cube(bounding_box_width*2, center=true);

   translate([0, l0,bounding_box_height - c0])
   rotate([45, 0, 0])
   translate([0, bounding_box_width, 0])
   cube(bounding_box_width*2, center=true);

};

module stem(){
    translate([-stem_width/2, 0, -d0])
    cube([stem_width, l0, diamond_box_height + d0]);
};

module diamond_box(){
    translate([0,0,diamond_box_height])
    rotate([0,45,0])
    translate([-diamond_box_dimension/2, 0, -diamond_box_dimension/2])
    cube([diamond_box_dimension, l0, diamond_box_dimension]);
};

// Recoil slots

module recoil(){
    translate([-bounding_box_width, -recoil_width/2, bounding_box_height - recoil_depth])
    cube([2 * bounding_box_width, recoil_width, 2 * recoil_depth]);
};

module recoils(){
    if(n0==0){}
    else if (n0==1){
            translate([0,a0,0])
            if(is_OK(0))
            recoil();
    }
    else{
        for(i = [0:n0 - 1]){
            if(is_OK(i))
            translate([0,a0 + i * recoil_spacing,0])
            recoil();
        };
    };
};

// Screw ports

module screw_shaft_plug(){
    cylinder(
        h = 9999999,
        center = true,
        d = hole_dia(),
        $fn = 36
    );
};

module screw_socket_head_plug(){
    translate([0, 0, bounding_box_height - head_depth()])
    cylinder(
        h = 9999999,
        d = head_dia(),
        $fn = 36
    );
};

module screw_coundersunk_head_plug(){
    translate([0,0, bounding_box_height - head_dia()/2])
    cylinder(
        d1 = 0,
        d2 = 9999999,
        h = 9999999/2,
        $fn = 36
    );
};

module screw_plug()
union(){
    screw_shaft_plug();
    if(st0 > 0){
        screw_socket_head_plug();
    } else {
        screw_coundersunk_head_plug();
    };
};

module screws_plug(){
    if (len(sp0) > 0){
        for(i = sp0){
            translate([0,i,0])
            screw_plug();
        };
    };
};

// Assembly

    intersection(){
        union(){
            stem();
            diamond_box();
        };
        difference(){
            bounding_box();
            union(){
                recoils();
                chamfer_plugs();
                screws_plug();
            };
        };
    };
};
```
picatinny-customizer.scad:
```
use<picatinny-rail.scad>;

//    What's this?

// This is a customizer which is intended to make standalone rails using the Picatinny rail library. To use it, you need Picatinny rail.scad (which should have been in the same download as this) either in the same directory as this file or wherever you install OpenSCAD libraries on your system.

// If you don't see a customizer, make sure that "hide customizer" in the Window menue is unchecked - and if you don't see *that*, that you have the latest version of OpenSCAD.

/*[Rail dimensions]*/

// The number of recoil slots which will be present on the rail.
Number_of_recoil_slots = -1; // [-1: "Automatic, based on length",0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,27,29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50]

// The length of the rail. If this is set to 0, the length will be calculated based on ... well, it's complicated. If you want a certain length it's better to just set it directly.
Length = 75; // [0:1:500]

/*[Screw ports: what and where]*/
// If unchecked, there will be no screw ports and everything in this and the next section will be ignored.
Include_screw_ports = false;
// Each number in this list gives the position of a screw port, in mm from the beginning of the rail. This list can be separated by commas, spaces, or anything that isn't a decimal point or digit.
Screw_positions = "7.5, 67.5";
// What type of screw will be used
Screw_type = "Metric hex socket head"; //["Metric hex socket head", "Metric hex countersunk"]
// Which size of screw will be used
Metric_screw_size = 4; // [8, 6, 5, 4, 3, 2.5, 2]
// This makes the screw holes larger. A reccomended starting point is half the diameter of your printer's nozzle.
Screw_clearance = 0.25; // [0 : 0.01 : 1]

/*[Screw ports: how they affect slots]*/

// This is how the recoil slots will be aligned on the rail. "Automatic" ignores screw positions. "Slots" and "ridges" try to align the slots and the ridges between them with the first screw, respectively. (That's the first screw listed in "Screw positions", not necesarily the one closest to the beginning of the rail.)
Slot_alignment = "Automatic"; // ["Automatic", "Slot on first screw", "Ridge on first screw"]
// Slots which are too close to screw ports may be omitted. This simply results in fewer slots; the rail does not gain slots elsewhere to compensate.
Omit_slots_near_screws = "Yes (auto threshold)"; // ["Yes (automatic threshold)", "Yes (manual threshold)", "No"]
// How close is "too close" for the purpous of omitting slots too close to screws? This is only used if "Yes (manual threshold)" is selected above.
Threshold = 4; // [0: 0.01 : 10]

/*[Miscleanious]*/
// Extends the rail below the xy plane. This is useful for having a rail be part of a design without a zero-width gap, or just taller.
Drop = 0; // [0: 0.1: 10]
// Adds a chamfer to the ends of the rail
Chamfer = 0; // [0: 0.1 : 5]
// This makes preview a bit less fast (but still very quick), and prevents some weird visual errors.
Force_render_during_preview = true;
Disregard_all_that_and_just_show_me_examples = false;

module dummy_that_stops_customizer(){};

//	======================================================================
//
//		String to list of numbers
//
//

// Converts a string with numbers (as text) to a OpenSCAD list of numbers.
//
// Decimal points are respected. All characters that aren't numerals or decimal points are treated as separators. Multiple separators in a row (e.g. spaces after commas) are OK.

//	This currently cannot handle negative numbers or scientific notation.

// Loosely based on code by Stone Age Sculptor, 2023, License CC0, published in a reddit comment. I've expanded the capabilities and have rewritten almost the whole thing in the process.
// https://www.reddit.com/r/openscad/comments/17f7lu9/a_list_with_a_variable_length_of_numbers_in_the/k6yzoc3/
//
//

function separator_to_hashtag(char) = (
	char >= "0" && char <= "9" ?
		char :
	char == "." ?
		char :
		"#"
);

function all_spearators_to_hashtags(string, i=-1) = (
	len(string) == 0 ?
		"#" : // Gauranteed output of at leat one hashtag
	i == -1 ?
		str( // Prepend a hashtag
			"#",
			all_spearators_to_hashtags(string, i = 0)
		) :
	i >= len(string) ?
		"#" : // Append a hashtag
		str(
			separator_to_hashtag(string[i]),
			all_spearators_to_hashtags(string, i = i+1)
		)
);

function remove_redundant_separators(string, i=0) = (
	i >= len(string) - 1 ?
		"#" :
	string[i] == "#" && string[i+1] == "#" ?
		str(remove_redundant_separators(string, i = i+1)) :
		str(
			string[i],
			remove_redundant_separators(string, i = i+1)
		)
);

function separator_positions(string, i = 0) = (
	i >= len(string) ?
		[] :
		concat(
			string[i] == "#" ? i : [],
			separator_positions(string, i = i+1)
		)
);

function extract_string(string, start = 0, end = 0) = (
	start >= end ?
		string[end] :
		str(
			string[start],
			extract_string(string, start = start + 1, end = end)
		)
);

function to_list_of_strings(string, separator_positions) = [
	for(i = [0 : len(separator_positions)-2])
	extract_string(
		string,
		start = separator_positions[i]+1,
		end = separator_positions[i+1]-1
	)
];

function find_decimal(string, i = 0) = (
	i >= len(string) ?
		i :
	string[i] == "." ?
		i :
		find_decimal(string, i = i+1)
);

function remove_decimals(string, i = 0) = (
	i >= len(string) ?
		"" :
	str(
		string[i] == "." ? "" : string[i],
		remove_decimals(string, i = i+1)
	)
);

function char_to_num(c) =
	ord(c) - ord("0");

function to_integer(string, i = 0) = (
	i >= len(string) ?
		0 :
	(10^i) * char_to_num(string[len(string) - i - 1]) + to_integer(string, i = i+1)
);

function string_to_number(string) = (
	let(exponent = find_decimal(string) - len(remove_decimals(string)))
	to_integer(remove_decimals(string)) * 10 ^ exponent
);

function string_to_list_of_numbers(string) = (
	let(sanitized_string =
		remove_redundant_separators(
			all_spearators_to_hashtags(
				string
			)
		)
	)
	let(list =
		to_list_of_strings(
			sanitized_string,
			separator_positions(
				sanitized_string
			)
		)
	)
	[
		for(i = [0:len(list)-1])
		string_to_number(list[i])
	]
);

//	======================================================================
//
//		The rail
//
//

module the_rail(){
    picatinny_rail(
    l =
        Length > 0 ? Length : undef,
    n =
        Number_of_recoil_slots >= 0 ? Number_of_recoil_slots : undef,
    d =
        Drop,
    c =
        Chamfer,
    a =
        Slot_alignment == "Automatic" ? "auto" :
        Slot_alignment == "Slot on first screw" ? "slot" :
        "ridge",
    sp =
        Include_screw_ports ?
        string_to_list_of_numbers(Screw_positions) : [],
    st =
        Screw_type == "Metric hex socket head" ? Metric_screw_size :
        - Metric_screw_size,
    sc =
        Screw_clearance,
    os =
        Omit_slots_near_screws == "Yes (auto threshold)" ? true :
        Omit_slots_near_screws == "Yes (manual threshold)" ? Threshold :
        false
    );
};

expected_version = 2.1;

if(picatinny_rail_version() > expected_version){
    echo("Oops! You have a more recent version of the picatinny rail generator. This customizer is for v2.1. Some features might be missing from the customizer, even though the generator supports them.");
}
else if(picatinny_rail_version() == undef || picatinny_rail_version() <expected_version){
    echo("Oops! You have an older version of the picatinny rail generator. This customizer is for v2.1. Some features might not work.");
};

module examples(){
	translate([-60,0,0]) picatinny_rail(c=3);

	translate([-30,0,0]) picatinny_rail(d=5);

	picatinny_rail();

	translate([30,0,0]) picatinny_rail(sp = [7.5, 7.5, 7.5, 7.5, 67.5]);

	translate([60,0,0]) picatinny_rail(l=50, c=1.5);

	translate([90,0,0]) picatinny_rail(l=50, n=3, c=1.5);
};

if(Disregard_all_that_and_just_show_me_examples == false){
	if(Force_render_during_preview){
		render() the_rail();
		}
	else the_rail();
	}
else {
	if(Force_render_during_preview){
		render() examples();
		}
	else examples();
	};
```