[User]
Hey, I'm looking to generate some parametric models for a modular drawer system in OpenSCAD. I've been using MarcElbichon's Ultimate Drawer System and its expansions, and I want to be able to generate my own drawers and compartments with more customization options. I'm trying to avoid having to modify STL files for every size change or small adjustment.

Specifically, I need to generate two main types of modules: "drawers" and "compartments" (or "modules", I'm not sure which term to use).

**For Drawers:**

*   **Size:** The drawers should be defined by their width, length, and height in "Units" (U), where 1U equals 120mm wide, 120mm long, and 20mm tall (minus 1mm for the floor). I want to be able to set these U dimensions independently for width, length, and height as decimal values (e.g., 0.5U, 1U, 1.5U, 2U, etc.)
*   **Labeling:** I need to be able to toggle labels on or off. When enabled, they should be positioned either on the top or bottom of the front of the drawer, with the height of the label being either 11mm (for compartments) or 16mm (the original drawer height). The width of the label holder should be selectable between 17mm, 27mm, 47mm, and 51mm. I need the labels to be added to both the left and right sides of the front face.
*   **Handles:** I want a handle type option that allows me to choose between the original UDS handle design, or no handle at all.
*   **Rails:** The drawers should have rails to slide on. These should be able to be aligned at either the top or bottom of the drawer. For simplicity, I only need rails to extend along the full width, as I will have shelves that can be added on either side.
*   **Geometry:** I would like the corners of the drawer to have a default radius of 4mm and a floor thickness of 1mm.

**For Compartments/Modules:**

*   **Size:** These should also be defined by their width, length, and height in Units (U), but here a single unit should be equal to 9.75mm wide and long, and 20mm tall. I need the ability to set these dimensions independently for width, length, and height as whole numbers.
*   **Chamfer:** I need an option to add a chamfer to the bottom edge of the compartment. I need to control the size of the chamfer.
*  **Labeling:** The compartments should be able to have optional labels along the width. The label size will be scaled down based on the width of the module. For module widths above 5U the default 47mm width is used; for widths 3U or 4U, the width should be at most 27mm; for modules of 3U, it should be at most 17mm. Modules of width 1U and 2U should not have labels. The position of the label along the height will be the module height minus 11mm (a constant height offset to give space between the top of the module and the label holder).
*   **Geometry:** The corners should have a radius of 3mm and the floor should be 2mm thick.

**General Requirements:**

*   I would like to be able to select between generating a drawer or a compartment from the same file.
*   I would like to have an overall variable to set the corner resolution (number of faces used when rendering curves) to affect smoothness/rendering time.
*   All measurements should match the original UDS and module designs to ensure compatibility.

It would be great if you could generate the OpenSCAD files for these. I'm not using any external libraries at the moment so it should be self-contained. Thanks!

[Assistant]
Customizable_UDS_Drawer.scad:
```
/* [Component Type] */
type = "drawer"; //[drawer, module]

/* [Drawer Size Options] */
// Width of the drawer in Units
drawer_Uwidth = 1;	//[.5:.5:2]
// Length of the drawer in Units
drawer_Ulength = 1;	//[.5:.5:2]
// Height of the drawer in Units
drawer_Uheight = 1;	//[1:1:6]
	//drawer_chamfer = false;

/* [Drawer Label Options] */

// Toggles drawer labels
drawer_label = true;
// The original height of the drawer labels is 16mm, the compartment label height is 11mm.
drawer_label_height = 16;//[11:Compartment, 16:Original]
// The original width of the drawer labels is 51mm, the compartment label width is 47mm.
drawer_label_width = 51;//[17:Extra Small, 27:Small, 47:Compartment, 51:Original]
// Aligns drawer labels to top or bottom.
drawer_label_position = "bottom"; //[top, bottom]

/*[Hidden]*/
drawer_width=120*drawer_Uwidth;
drawer_length=120*drawer_Ulength;
drawer_height=20*drawer_Uheight - 1;
drawer_size=[drawer_width, drawer_length, drawer_height];

/* [Drawer Handle and Rails Options] */
handle_type = "original"; //[original, none]

rail_alignment="bottom"; //[top, bottom]
	//rail_front_offset=10;
	//rail_front_style=3; //[0:square, 3:round]
	//rail_back_offset=0;
	//rail_back_style=3;//[0:square, 3:round]
/*[Hidden]*/
rail_position = rail_alignment == "top" ? drawer_height - 1 : 0;

/* [Module Size Options] */
// Width of modular compartment in units
module_Uwidth = 3;//[1:1:24]
// Length of modular compartment in units
module_Ulength = 3;//[1:1:24]
// Length of modular compartment in units
module_Uheight = 1;//[1:1:6]
// Toggles .5mm chamfer

/* [Module Extra Options] */
// Adjusts the size of the chamfer around the bottom of the compartment
module_chamfer = .5; //[0:.05:1]
// Lable added along the width (x-axis) of the compartment. The width of the label is scaled down for modules of widths 3,4, or 5. Labels will not be added to modules of width 1 or 2.
module_label_type = 47; //[17:Extra Small, 27:Small, 47:Original, 0:None]

/*[Hidden]*/
module_width = 9.75*module_Uwidth;
module_length = 9.75*module_Ulength;
module_height = module_Uheight*20 - 2;
module_size = [module_width, module_length, module_height];

/* [Extras] */
//The number of faces that make up the curves. The higher the value, the smoother the corners, but the longer it takes to render.
corner_resolution=4; //[1:100]

/*[Hidden]*/

//Original UDS measurements for default values
UDS_radius=4;
UDS_chamfer=.5;
UDS_thickness=1;
UDS_rail_width=3;
UDS_rail_offset=10;
UDS_inner_label_height=11;
UDS_inner_label_width=47;

$fn=corner_resolution*4;

EPS=0.01;
RADIUS=4;
CHAMFER=.5;
THICKNESS=1;
DRAWER=drawer_size;
MODULE=module_size;

module Run() {
	if(type == "drawer") {
		union() {
			Rails(drawer_size, rail_position);
			translate([0, drawer_length/2, 0]) {
				Handle(handle_type);
			}
			if(drawer_label) {
				for(i=[-1, 1]) {
					translate([i*drawer_width/4,drawer_length/2, drawer_label_position == "top"? drawer_height-drawer_label_height : 0]){
						LabelHolder(drawer_Uwidth==.5 ? 21:drawer_label_width, drawer_label_height, drawer_label_position);
					}
				}
			}
			Compartment(drawer_size, RADIUS);
		}
	}
	else if(type == "module") {
		union() {
			translate([0, -module_length/2+1, module_height-11]){
				if(module_Uwidth > 5) {
					LabelHolder(width=module_label_type);
				}
				else if(module_Uwidth > 3 ) {
					LabelHolder(width = module_label_type <27 ? module_label_type : 27);
				}
				else if(module_Uwidth == 3 ) {
					LabelHolder(width = module_label_type <17 ? module_label_type : 17);
				}
			}
			Compartment(module_size, RADIUS-1, module_chamfer);
		}
	}
}

module RoundedBox(size, radius=RADIUS, chamfer=0){ //size=[x,y,z]
	hull(){
		for (i=[-1, 1]) for (j=[-1, 1]){
			translate([i*(size.x/2-radius), j*(size.y/2-radius),0]) {
				translate([0, 0, chamfer]) {
					cylinder(h=size.z-chamfer, r=radius);
				}
				cylinder(h=chamfer, r1=radius-chamfer, r2=radius);
			}
		}
	}
}

module Compartment(size, radius, cOut=0, cIn=0){ //cOut = outer chamfer, cIn = inner chamfer (not yet in use)
	difference(){
		RoundedBox(size, radius, cOut);

		translate([0,0,1]){
			RoundedBox(size + [-2, -2, 0], radius-1, cIn);
		}
	}

}

module Rails(size, position){

	difference() {
		for (i = [0, 1]) mirror([i, 0, 0]){
		  hull(){
				translate([(size.x/2),(size.y/2)-13,position]){
					 cylinder(r=3, h=1);
				}
				translate([(size.x/2)-4,-size.y/2,position]){
					 cube([7, 4, 1]);
				}
		  }
		}
		translate([0, 0, -1])
			RoundedBox(size + [-1, 0, 2]);
	}
}

module LabelHolder(width=47, height=11, position="top"){
	translate([-width/2, 0, 0]) {
		union() {
			difference() {
				cube([width, 2, height]);
				translate([2.5,-.5,2]){
					cube([width-5, 3.5, height]);
				}
				translate([1,-1.5,1]){
					cube([width-2, 2.5, height]);
				}
			}
			if (position == "top") {
				rotate([0,90,0]){
					linear_extrude(height = width){
						polygon([[0,0],[0,2],[3,0]]);
					}
				}
			}
		}
	}
}

module Handle(type="original") {
	if(type == "original") {
		translate([0, 47/6, 8]){
			rotate([90,0,90]){
				difference(){
					translate([-5,0,0]){
						cylinder(r=(73/6), h=1, center=true);
					}
					for(a=[0,90,180]) {
						rotate(a, [0, 0, 1]){
							translate([0,20,0]){
								cube(24, true);
							}
						}
					}
				}
			}
		}
	}
}

Run();

//Handle();
//LabelHolder();
//MakeDrawer(DRAWER, RADIUS);
//Rails(DRAWER);
dim = [20,20,10];
//BeveledCubeXY(dim);
//Compartment(DRAWER, RADIUS, CHAMFER);
//RoundedBox();
//translate([-3/2+4, -4/2+4,0])
//cylinder(r=4, h=5);
```


[User]
Hey, I need help designing a PAS (Pedal Assist System) sensor ring for an ebike. I've got the basic idea, but I'm struggling with the parametric aspects and I need it to be adaptable for different bikes. I've based it on the code above.

Here's what I need:

The ring needs to have an outer diameter with magnet holes and an inner section to fit onto the bike's axle. I'll be laser cutting this from 3mm material. I'll also be press-fitting 4mm diameter by 3mm thick magnets.

**Outer Ring:**

*   **`dout`**: The diameter of the circle where the magnet holes sit. I need to be able to adjust this.
*   **`nholes`**: The number of magnet holes around the outer ring.
*   **`holeD`**: The diameter of the holes for the magnets. This will be slightly smaller than 4mm, probably about 3.8mm to account for kerf. I need this to be adjustable.

**Inner Ring:**

*   **`inrCir`**: The inner diameter that goes on the axle. I'll need this to be easily changed because axles are not all the same diameter. The fit should be press-fit, so slightly smaller than the axle itself.
*   **`inrSqr`**: The size of the square section that fits the axle, inside the inner circle, like a flat spot. This is also important to adjust.

**Splines:**
*  The outer ring should have splines to allow flex, rather than be a solid ring.
*   **`lineLen`**: The length of the spline line from the inner ring.
*  **`angleOff`**: Angle of the line.
*  **`wOff`**: Width of the spline lines.
*  **`startDist`**: Spline start distance.
*  **`num`**: Number of splines.

**General requirements:**

*   The code should be parametric, so I can easily adjust these parameters (like `dout`, `inrCir`, etc.) without having to dig into the code.
*   I need the code to create a 2D shape that I can export as a DXF for laser cutting. So no need for 3D extrusion.
*   I'd like to use the `BOSL2` library if possible for the spline functionality because I like its spline implementation, otherwise if you can use something that gets the same result in OpenSCAD's default language, that's fine.
*   Please make the code well-commented so I can understand what each part does.

I think that covers it all. Let me know if you have any questions! Thanks!

[Assistant]
ebike_pas_sensor_ring.scad:
```
// holes position (diameter)
dout=67.75;
// inner dimension of axle (actually 15.8) smaller to press fit
inrCir=15.6;
// square part of axle
inrSqr=13.7;
// number holes/magnets in outer ring
nholes=12;
// small holes diam for magnets (actually 4mm but allow for laser kerf)
holeD=3.8;
// resolution
$fn=100;

//holetest(); // to test magnet fit
main();

module main() {
difference() {
    circle(d=dout+14);
    holes(dout/2,nholes); // outer ring
    splines(inrCir/2-1,20);
    innerPart();
}
}
//--------------------------------------------------
module holetest() {
    diff=.05;
    for (i=[-2:2]) {
        di=holeD+i*diff;
        echo(di);
        translate([0,i*(holeD+3)]) circle(d=di);
    }

}
//--------------------------------------------------
module splines(startDist,num) {
	lineLen=8;
	angleOff=15;
	wOff=3; // line thickness ? as angle
    beta=360/num; // angle divisions
        for (h=[1:num+1]) {
            p1x=startDist*sin(h*beta);
            p1y=startDist*cos(h*beta);
            p2x=startDist*sin(h*beta+wOff);
            p2y=startDist*cos(h*beta+wOff);
            p3x=(startDist+lineLen)*sin(h*beta+angleOff);
            p3y=(startDist+lineLen)*cos(h*beta+angleOff);
            p4x=(startDist+lineLen)*sin(h*beta+angleOff+wOff);
            p4y=(startDist+lineLen)*cos(h*beta+angleOff+wOff);

			polygon([[p1x,p1y],[p2x,p2y],[p4x,p4y],[p3x,p3y],[p1x,p1y]]);
    }
}
//--------------------------------------------------
module holes(dist,num) {
    beta=360/num;
    for (h=[0:num]) {
        x=dist*sin(h*beta);
        y=dist*cos(h*beta);
        translate ([x,y])
            circle(holeD/2);
    }
}
//--------------------------------------------------
module innerPart() { // to fit axle
    intersection() {
        translate([-inrSqr/2,-inrSqr/2])
            square([inrSqr,inrSqr]); // axle square
        circle(r=inrCir/2); // axle circle
    }
}

```


[User]
Hey, I'm looking to create a set of customizable pixel art style figures, specifically based on the Lemmings video game characters. I've seen some examples, and I want to build my own version in OpenSCAD.

The design should have a few key features:

*   **Pixel Grid:** The figures are composed of an 8x8 grid of "pixels." Each pixel is essentially a cube with beveled edges.
*   **Variable Bevel:** I need to be able to adjust the bevel size (or even eliminate it) on the pixel cubes. I'd like to control this with a parameter, maybe like an integer between 1 and 10 where 1 is a large bevel, 9 is a small bevel, and 10 is no bevel.
*   **Gaps:** When bevels are enabled, I would like the option to have gaps between the pixels. The gap size should match the bevel size, and have a setting to be turned off so the pixels just touch.
*   **Multiple Figures:** I want to be able to define multiple different character designs, where each pixel has a color. I'll need to be able to switch between these different characters. I have four in mind to start with: a Blocker, a Walker, a Climber, and a Shrug. They have different color arrangements on the 8x8 grid which I can provide.
*   **Colors:** I need to specify a color palette and map it to the different parts of each character.
*   **Background Plate:** It would be cool to optionally add a background plate underneath the figure, with a parameter to adjust the depth.
*   **Parametric:** All of the above things should be customizable using parameters, including the size of the pixels.

For OpenSCAD, I'm using version 2021.01 or newer. I don't need any external libraries.

Let me know if you can help me build this. I'm not super familiar with complex OpenSCAD code, so the simpler the better!

[Assistant]
Lemmings.scad:
```
/*
Lemmings

by IOIO72 aka Tamio Patrick Honma (https://honma.de)

This work is licensed under the Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License. To view a copy of this license, visit http://creativecommons.org/licenses/by-nc-sa/4.0/ or send a letter to Creative Commons, PO Box 1866, Mountain View, CA 94042, USA.
*/

/* [Basic] */

// Select the lemming
figure = 0; // [0:"Blocker", 1:"Walker", 2:"Climber", 3:"Shrug"]

// 1 = large bevel, 9 = small bevel, 10 = no bevel
bevel_factor = 4; // [1:10]

// Gaps between the pixel blocks are only available when bevel set.
with_gaps = true;

// Background plate depth (0 = no background)
background_depth = 0;

/* [Settings] */

// one pixel equals pixel_size millimeters
pixel_size = 6;

// Number of fragments (be aware of high values, which cause extensive calculations for the bevels)
$fn = 12; // [1:80]

/* [Hidden] */

bevel = (bevel_factor > 9) ? 0 : pixel_size * 1 / bevel_factor;
gap = with_gaps ? bevel : 0;
width = 8;
height = 8;
color_index_none = 0;
color_index_skin = 1;
color_index_hair = 2;
color_index_dress = 3;
colors = [
  "#000000", // none
  "#bcbcbc", // skin
  "#00a800", // hair
  "#2038ec" // dress
];

figures = [
  [ // Blocker
    [
      color_index_none,
      color_index_skin,
      color_index_skin,
      color_index_none,
      color_index_none,
      color_index_skin,
      color_index_skin,
      color_index_none,
    ],
    [
      color_index_none,
      color_index_none,
      color_index_dress,
      color_index_none,
      color_index_none,
      color_index_dress,
      color_index_none,
      color_index_none,
    ],
    [
      color_index_none,
      color_index_none,
      color_index_dress,
      color_index_dress,
      color_index_dress,
      color_index_dress,
      color_index_none,
      color_index_none,
    ],
    [
      color_index_none,
      color_index_none,
      color_index_none,
      color_index_dress,
      color_index_dress,
      color_index_none,
      color_index_none,
      color_index_none,
    ],
    [
      color_index_skin,
      color_index_skin,
      color_index_skin,
      color_index_dress,
      color_index_dress,
      color_index_skin,
      color_index_skin,
      color_index_skin,
    ],
    [
      color_index_skin,
      color_index_none,
      color_index_hair,
      color_index_skin,
      color_index_skin,
      color_index_none,
      color_index_none,
      color_index_skin,
    ],
    [
      color_index_none,
      color_index_none,
      color_index_hair,
      color_index_hair,
      color_index_skin,
      color_index_skin,
      color_index_none,
      color_index_none,
    ],
    [
      color_index_none,
      color_index_none,
      color_index_none,
      color_index_hair,
      color_index_hair,
      color_index_none,
      color_index_none,
      color_index_none,
    ],
  ],
  [ // Walker
    [
      color_index_skin,
      color_index_none,
      color_index_none,
      color_index_skin,
      color_index_skin,
      color_index_none,
      color_index_none,
      color_index_none,
    ],
    [
      color_index_skin,
      color_index_dress,
      color_index_dress,
      color_index_dress,
      color_index_dress,
      color_index_none,
      color_index_none,
      color_index_none,
    ],
    [
      color_index_none,
      color_index_skin,
      color_index_dress,
      color_index_dress,
      color_index_none,
      color_index_none,
      color_index_none,
      color_index_none,
    ],
    [
      color_index_none,
      color_index_skin,
      color_index_skin,
      color_index_dress,
      color_index_none,
      color_index_none,
      color_index_none,
      color_index_none,
    ],
    [
      color_index_none,
      color_index_none,
      color_index_skin,
      color_index_dress,
      color_index_none,
      color_index_none,
      color_index_none,
      color_index_none,
    ],
    [
      color_index_none,
      color_index_hair,
      color_index_skin,
      color_index_skin,
      color_index_skin,
      color_index_none,
      color_index_none,
      color_index_none,
    ],
    [
      color_index_none,
      color_index_hair,
      color_index_hair,
      color_index_skin,
      color_index_hair,
      color_index_none,
      color_index_none,
      color_index_none,
    ],
    [
      color_index_none,
      color_index_none,
      color_index_hair,
      color_index_hair,
      color_index_none,
      color_index_none,
      color_index_none,
      color_index_none,
    ],
  ],
  [ // Climber
    [
      color_index_none,
      color_index_none,
      color_index_none,
      color_index_none,
      color_index_none,
      color_index_none,
      color_index_none,
      color_index_none,
    ],
    [
      color_index_none,
      color_index_none,
      color_index_none,
      color_index_none,
      color_index_none,
      color_index_dress,
      color_index_skin,
      color_index_skin,
    ],
    [
      color_index_none,
      color_index_hair,
      color_index_none,
      color_index_none,
      color_index_dress,
      color_index_dress,
      color_index_dress,
      color_index_none,
    ],
    [
      color_index_hair,
      color_index_hair,
      color_index_none,
      color_index_dress,
      color_index_dress,
      color_index_dress,
      color_index_none,
      color_index_none,
    ],
    [
      color_index_hair,
      color_index_hair,
      color_index_hair,
      color_index_dress,
      color_index_dress,
      color_index_dress,
      color_index_none,
      color_index_none,
    ],
    [
      color_index_none,
      color_index_hair,
      color_index_skin,
      color_index_skin,
      color_index_dress,
      color_index_skin,
      color_index_none,
      color_index_none,
    ],
    [
      color_index_none,
      color_index_hair,
      color_index_skin,
      color_index_skin,
      color_index_none,
      color_index_none,
      color_index_skin,
      color_index_none,
    ],
    [
      color_index_none,
      color_index_none,
      color_index_none,
      color_index_skin,
      color_index_none,
      color_index_none,
      color_index_none,
      color_index_skin,
    ],
  ],
  [ // Shrug
    [
      color_index_none,
      color_index_none,
      color_index_skin,
      color_index_skin,
      color_index_skin,
      color_index_skin,
      color_index_none,
      color_index_none,
    ],
    [
      color_index_none,
      color_index_none,
      color_index_none,
      color_index_dress,
      color_index_dress,
      color_index_none,
      color_index_none,
      color_index_none,
    ],
    [
      color_index_none,
      color_index_none,
      color_index_none,
      color_index_dress,
      color_index_dress,
      color_index_none,
      color_index_none,
      color_index_none,
    ],
    [
      color_index_none,
      color_index_none,
      color_index_none,
      color_index_dress,
      color_index_dress,
      color_index_none,
      color_index_none,
      color_index_none,
    ],
    [
      color_index_none,
      color_index_skin,
      color_index_none,
      color_index_dress,
      color_index_dress,
      color_index_none,
      color_index_skin,
      color_index_none,
    ],
    [
      color_index_skin,
      color_index_none,
      color_index_skin,
      color_index_skin,
      color_index_skin,
      color_index_skin,
      color_index_none,
      color_index_skin,
    ],
    [
      color_index_none,
      color_index_none,
      color_index_hair,
      color_index_skin,
      color_index_skin,
      color_index_hair,
      color_index_none,
      color_index_none,
    ],
    [
      color_index_none,
      color_index_none,
      color_index_none,
      color_index_hair,
      color_index_hair,
      color_index_none,
      color_index_none,
      color_index_none,
    ],
  ],
];

module pixel(x, y, ci = color_index_none) {
  if (ci != color_index_none) {
    translate([x * pixel_size + x * gap, y * pixel_size + y * gap, 0]) {
      color(colors[ci]) {
        minkowski(10) {
          cube(pixel_size);
          sphere(bevel);
        };
      };
    };
  };
};

module background() {
  translate([- bevel, - bevel, - abs(background_depth) - bevel]) {
    color("#000000") {
      cube([
        width * pixel_size + gap * width - gap + 2 * bevel,
        height * pixel_size + gap * height - gap + 2 * bevel,
        abs(background_depth)
      ]);
    };
  };
};

module lemming(number = 0) {
  for (row = [0 : height - 1]) {
    for (column = [0 : width - 1]) {
      pixel(column, row, figures[number][row][column]);
    };
  };
};

lemming(figure);
background();
```


[User]
I need a more comprehensive solution for generating washers of various types and with configurable parameters. I'm thinking beyond just simple flat washers.

Could you create a parametric OpenSCAD design, or a set of designs, that could generate a variety of washer types? I'd need the following features:

*   **Basic Flat Washer:** Like the one I've attached but fully configurable for outside diameter, hole diameter, and thickness. This should be the default.
*   **Countersunk Washer:** This would be similar to the flat washer, but with a countersunk hole on one or both sides. The countersink angle and depth should be configurable. The countersink is intended for flat-head screws.
*   **Beveled Washer:** Instead of a countersunk hole, the hole edge could be beveled at a configurable angle and depth.
*  **Shouldered Washer:** A washer with a raised cylindrical shoulder on one side. The shoulder's diameter and height should be configurable. The shoulder should be centered on the hole.
*   **Material Thickness:** It's important to be able to define a material thickness value, even if the "washer_thickness" doesn't match that, especially for more complex designs. If I specify a material thickness, then the output model should be constrained to be the specified thickness or less, and I should be able to offset features to ensure they fit within that thickness.
*   **Rounded edges:** the top and bottom edges of the flat washer, and other relevant features of the other washer types, should have an option for rounded edges with a configurable radius

It would be great if all of these types of washers could be generated with a single design, or a set of related designs, where I can just select which type and then configure the specific parameters for each type. For instance I might want a countersunk washer with a specified outside diameter and hole diameter, and then choose how many degrees of countersink it should have.

I'm fine with using modules or function calls to handle each type of washer. I'm also okay with a library that uses some basic common modules for things like cylinders with rounded edges.

I’d like to be able to use the `difference()` operation to ensure that the hole is cut properly from the shape of the overall washer. I'd prefer to not need to rely on a boolean intersection (or `intersection()`) operation for this.

The design should be well commented so it's easy to understand and modify. Please use `units = "mm";` at the top of the file(s). Also, please use the `BOSL` library, and specifically any relevant modules from the `metric.scad` file that it provides.

[Assistant]
washer.scad:
```
// Simple Customizable Washer
// by Mark Thompson

washer_outside_diameter = 9;
washer_hole_diameter = 5;
washer_thickness = 5;

$fn = 72;

difference() {
    translate([0,0,washer_thickness/2])
        cylinder(washer_thickness,washer_outside_diameter/2,washer_outside_diameter/2,true);

    translate([0,0,washer_thickness/2])
        cylinder(washer_thickness+0.1,washer_hole_diameter/2,washer_hole_diameter/2,true);
}

```


[User]
Hey, I'd like to create some multi-bases for tabletop models, kind of like the ones Games Workshop uses for Warhammer, but with some customization.

I want a base that can hold multiple rectangular models, arranged in a grid. The overall base should have rounded edges, and I'd like to be able to add a label to the bottom. I'm picturing something where the models sit flush with the base surface, with engraved gridlines showing where each model should go.

Here are the main features I need to be able to control:

*   **Model Size:** The width and length of a single model's base, which will be rectangular.
*   **Grid Size:** The number of models in the front (X direction) and the number of model rows (Y direction).
*   **Label:** Text to be engraved on the bottom of the base, including the font, font size, and an offset in both X and Y direction.
*   **Rounded Edges:** The radius of the rounding on the top of the base corners. I'd also like a tapering option for the top face of the base.
*   **Border:** A consistent border around the entire array of model positions.
*   **Internal Spacing:** Some extra tolerance between each model, like the amount of "wiggle room".
*   **Grid:** The option to turn on/off the grid lines between the model slots, including the width and depth of those lines.

I'd need parameters to control all of those features. I'm thinking the overall size of the base should be calculated based on the model size, the grid count, the border width, and the internal spacing. It'd be helpful if the grid and the border were configurable, so they don't have to be there if I don't want them.

I don't have a specific library in mind, but I'm assuming some basic things like `linear_extrude`, `cube`, `translate`, `rotate`, `text`, `minkowski`, `difference` and `for` loops will be needed. I will also need to specify the face vertices for the base to allow tapering, so I'll also need `polyhedron`. Can you create the OpenSCAD files for me?

[Assistant]
multibase_closed.scad:
```
// width of a single model
model_width = 25; // [10:500]

// length of a single model
model_length = 50; // [10:500]

// number of models in the front
count_X = 5; // [1:20]

//number of model ranks
count_Y = 2; // [1:20]

//label on the bottom side
label = "my_tag";

//font type of the label
fontT = "Liberation Sans";

//size of the font
fontsize = 15;// [5:50]

//extra spacing on each side of the models on the inside
tol  = 0.2; // [0:0.1:5]

//radius on the upper side
radius = 1.5; //[0:2.5]

//boarder width
rand = 2.5; //[1:0.1:5]

//boarder taper
taper = 0.7; //[0:0.1:2]

//label offset X direction
labelXoffset = 5; //[0:50]

//label offset Y direction
labelYoffset= 5; //[0:50]

// print grid for the models
grid = true; //!!

//width of the grid line
grid_width = 0.1; //[0:0.1:1]

//depth of the grid trench
grid_depth = 0.1; //[0:0.1:1]

dimX = rand*2 + model_width*count_X + tol*2;
dimY = rand*2 + model_length*count_Y + tol*2;

module generalform(height, width){

    $fn=20;
    minkowski()
    {
        sphere(radius);
        polyhedron( CubePoints_outer, CubeFaces );
    }
}

 module createLabel(length, width){
 translate([length-2,width,0.5]){
rotate(a=[0,180,180]){
    linear_extrude(height = 0.6){
text(label,size = fontsize, font=fontT);
}}}}

CubePoints_outer = [
  [  radius,         radius,          0    ],  //0
  [ dimX-radius,      radius,          0    ],  //1
  [ dimX-radius,      dimY-radius,     0    ],  //2
  [  radius,         dimY-radius,     0    ],  //3
  [  radius+taper,         radius+taper,          5-radius    ],  //4
  [ dimX-taper-radius,    radius+taper,          5-radius    ],  //5
  [ dimX-taper-radius,    dimY-taper-radius,   5-radius    ],  //6
  [  radius+taper,         dimY-taper-radius,   5-radius    ]]; //7

module make_grid_X(){

    if(grid && (count_X >= 2)){
        for (i = [1:1:(count_X-1)])
        {
            color("Green")translate([rand+i*model_width+tol,rand,1.6-grid_depth])cube([grid_width, dimY-(2*rand), grid_depth]);
    }}}

module make_grid_Y(){

    if(grid && (count_Y >= 2)){
        for (i = [1:1:(count_Y-1)])
        {
            color("Green")translate([rand,rand+i*model_length+tol,1.6-grid_depth])cube([ dimX-(2*rand),grid_width, grid_depth]);
    }}}

CubeFaces = [
  [0,1,2,3],  // bottom
  [4,5,1,0],  // front
  [7,6,5,4],  // top
  [5,6,2,1],  // right
  [6,7,3,2],  // back
  [7,4,0,3]]; // left

 difference(){
     color("blue")
     difference()
     {
     generalform(dimX, dimY);
     translate([0,0,-10]) cube([dimX,dimY, 10]);

    }
    color("Red") translate([rand,rand,1.6]) cube([dimX-rand*2, dimY-rand*2, 10]);
    make_grid_X();
    make_grid_Y();
    color("red") translate([0,fontsize,0]) createLabel(labelXoffset, labelYoffset);
 }

```


[User]
Okay, I've got a lamp design I'm working on, and I need some help creating the OpenSCAD files for it. I've already got some working parts, but I'd like to start fresh with a parametric approach. It's based on the "Articulating LED desk lamp" on Thingiverse, but with some major modifications. I've included my modified files as a reference.

Here's a breakdown of the features I need:

**Core Structure:**

*   **Arm Segments:** These should be parametric, allowing for variable length and thickness. I envision a toothed design for interlocking, similar to the original design but with the teeth being printed on the 'top' section (as opposed to the bottom, like in the originals). I need to be able to control the tooth size and spacing for optimal grip. The arm segments should have a 10mm diameter hole for the compression mechanism to fit through.

*   **Compression Mechanism:** I need a cover that compresses springs against the arm segments. This will include two parts, a wheel with an integrated collar that protrudes into the spring, and a screw that threads into the other wheel and locks them together. The wheels should be knurled for grip, and the compression should be adjustable. The thread should be parametric based on bolt size, and the bolt itself should be a separate part. I need it to be printed horizontally for strength, so I also need a clearance area around the bolt on the second part.

*   **Base:** I'll need a base for the lamp, something robust. It should have an opening for the clamp to fit inside.

*   **Swivel:** This should allow the lamp arm to swivel on the base, with a bolt that goes through the base into the swivel, which attaches to the first arm segment.

**Lighting:**

*   **Dual-Light Housing:** This should be designed to hold two IKEA VAXMYRA or OMLOPP LED lights side-by-side and have a slot in the back for the power cord to exit from. This housing should have screw locations for the lights as well as a way to secure the housing to the end of the lamp. Also, add a channel and a hole for wires to exit at the top, and a way to fix the housing to the arm. This should be parametric so that I can change it for other light fixtures.

**Clamp:**

*   **Parametric Clamp:** I need a clamp, something similar to the "Super Clamp with customizer" on Thingiverse. This should be parametric for length, width, depth, and thickness to fit different desk configurations. Also, it should be knurled to give it extra grip.

**Libraries:**

I'd like to make use of these libraries:

*   `threadlib.scad`: For generating the threads for the bolt and tap.
*   `knurledFinishLib.scad`: For adding knurling to the compression wheels and clamp.

**Parametric Requirements:**

I want these values to be configurable:

*   `arm_length`, `arm_thickness`, `arm_tooth_size`, `arm_tooth_spacing`
*   `wheel_diameter`, `wheel_thickness`, `collar_thickness`, `knurl_size`, `bolt_diameter`, `bolt_length`,
*   `base_diameter`, `base_height`, `clamp_width`, `clamp_depth`, `clamp_thickness`,
*   `light_diameter`, `light_depth`, `cable_slot_width`

Can you generate parametric OpenSCAD files for this lamp design? I'm happy to have multiple files for different parts. I want to be able to easily tweak these parameters to customize the lamp to my needs.

[Assistant]
clampV3.scad:
```
// clamp customizable akaJes 2016 (c)
// tweaked for increasing thickness not affecting other parts, renamed dimensions, finer knurling - 247generator 2018

//include <polyScrewThread.h>
//include <knurledFinishLib.h>
/*[clamp]*/
//
clamp_length=55;
clamp_width=25;
clamp_depth=30;
clamp_thickness=15;
/*[bolt&press]*/
knob_length=10;
knob_diameter=24;
screw_diameter=15;
minimum_clamp_opening=35;
// changes how tight the threads mesh. 4.3% x 16mm results in .688mm - Lower numbers tighten.
bolt_hole_space_factor=4.3;
press_diameter=20;
/*[visibility]*/
show_bolt=1; //[0:No,1:Yes]
show_press=1; //[0:No,1:Yes]
show_clamp=1; //[0:No,1:Yes]
//don't print assembled!!! :)
show_assembled=0; //[0:No,1:Yes]

/*[hidden]*/
diameter_ball=8;
screw_length=clamp_length+(clamp_thickness-12)-diameter_ball - (clamp_length - minimum_clamp_opening);
rounding=2;
length=clamp_length-rounding*2;
width=clamp_width-rounding*2;
depth=clamp_depth-rounding*2;
thickness=clamp_thickness-rounding*2;
hole_shift=depth-min(clamp_width/2,depth/2);
radius=1.7;//corners;

if (show_assembled)rotate([0,0,180]){
  base();
  translate([-knob_length-radius*thickness-rounding-8,hole_shift,clamp_width/2]){
    rotate([0,90,0])bolt();
    translate([knob_length+screw_length+5+8,0,0])rotate([0,-90,0])press();
  }
}else{
  if(show_clamp)
    base();
  if(show_press)
    translate([30,depth+20,0])press();
  if(show_bolt)
    translate([0,depth+20,0])bolt();
}

module corner(tr){
  intersection(){
    difference(){
      cylinder(r=tr,h=width,$fn=64);
      translate([0,0,-.1])
        cylinder(r=thickness*(radius-1),h=width+.2,$fn=32);
    }
    translate([-tr,-tr,0])cube([tr,tr,width]);
  }
}
module base(){
  translate([0,0,rounding])
    difference(){
    minkowski(){
      assign(tr=thickness*radius,ti=thickness*(radius-1))union(){
        corner(tr);
        translate([-tr,0,0])cube([thickness,depth,width]);
        translate([0,-tr,0])cube([length-ti*2,thickness,width]);
        translate([length-ti*2,0,0])rotate([0,0,90])corner(tr);
        translate([length-ti,0,0])cube([thickness,depth,width]);
      }
      sphere(r=rounding,$fn=16);
    }
    translate([0,hole_shift,width/2])rotate([0,-90,0])screw_thread(screw_diameter+((bolt_hole_space_factor/100)*screw_diameter),4,55,thickness*2,PI/2,2);
  }
}
module bolt(){
    knurled_cyl(knob_length, knob_diameter, 3, 3, 1, 2, 50);
    translate([0,0,knob_length])screw_thread(screw_diameter,4,55,screw_length,PI/2,2);
    translate([0,0,knob_length+screw_length])cylinder(h=6,d=6,$fn=30);
    translate([0,0,knob_length+screw_length+5])sphere(d=diameter_ball,$fn=32);
}
module rounded(h=5,d=20,r=2){
  translate([0,0,r])
    minkowski(){
      cylinder(d=d-r*2,h=h-r*2);
      sphere(r=r);
    }
}
module press(){
    assign($fn=32)
    difference(){
      union(){
        rounded(h=5,d=press_diameter,r=1);
        rounded(h=10,d=14,r=1);
        }
      translate([0,0,10-2])sphere(d=diameter_ball+.3);
      for (i=[0,120,240])
        translate([0,0,6.5])rotate([90,0,90+i])hull(){
          cylinder(d=3,h=10);
          translate([0,5,0])cylinder(d=3,h=10);
        }
    }
}

/*
 * knurledFinishLib.scad
 *
 * Written by aubenc @ Thingiverse
 *
 * This script is licensed under the Public Domain license.
 *
 * http://www.thingiverse.com/thing:9095
 *
 * Usage:
 *
 *    knurled_cyl( Knurled cylinder height,
 *                 Knurled cylinder outer diameter,
 *                 Knurl polyhedron width,
 *                 Knurl polyhedron height,
 *                 Knurl polyhedron depth,
 *                 Cylinder ends smoothed height,
 *                 Knurled surface smoothing amount );
 */
module knurled_cyl(chg, cod, cwd, csh, cdp, fsh, smt)
{
    cord=(cod+cdp+cdp*smt/100)/2;
    cird=cord-cdp;
    cfn=round(2*cird*PI/cwd);
    clf=360/cfn;
    crn=ceil(chg/csh);

    intersection()
    {
        shape(fsh, cird, cord-cdp*smt/100, cfn*4, chg);

        translate([0,0,-(crn*csh-chg)/2])
          knurled_finish(cord, cird, clf, csh, cfn, crn);
    }
}

module shape(hsh, ird, ord, fn4, hg)
{
        union()
        {
            cylinder(h=hsh, r1=ird, r2=ord, $fn=fn4, center=false);

            translate([0,0,hsh-0.002])
              cylinder(h=hg-2*hsh+0.004, r=ord, $fn=fn4, center=false);

            translate([0,0,hg-hsh])
              cylinder(h=hsh, r1=ord, r2=ird, $fn=fn4, center=false);
        }

}

module knurled_finish(ord, ird, lf, sh, fn, rn)
{
    for(j=[0:rn-1])
    assign(h0=sh*j, h1=sh*(j+1/2), h2=sh*(j+1))
    {
        for(i=[0:fn-1])
        assign(lf0=lf*i, lf1=lf*(i+1/2), lf2=lf*(i+1))
        {
            polyhedron(
                points=[
                     [ 0,0,h0],
                     [ ord*cos(lf0), ord*sin(lf0), h0],
                     [ ird*cos(lf1), ird*sin(lf1), h0],
                     [ ord*cos(lf2), ord*sin(lf2), h0],

                     [ ird*cos(lf0), ird*sin(lf0), h1],
                     [ ord*cos(lf1), ord*sin(lf1), h1],
                     [ ird*cos(lf2), ird*sin(lf2), h1],

                     [ 0,0,h2],
                     [ ord*cos(lf0), ord*sin(lf0), h2],
                     [ ird*cos(lf1), ird*sin(lf1), h2],
                     [ ord*cos(lf2), ord*sin(lf2), h2]
                    ],
                faces=[
                     [0,1,2],[2,3,0],
                     [1,0,4],[4,0,7],[7,8,4],
                     [8,7,9],[10,9,7],
                     [10,7,6],[6,7,0],[3,6,0],
                     [2,1,4],[3,2,6],[10,6,9],[8,9,4],
                     [4,5,2],[2,5,6],[6,5,9],[9,5,4]
                    ],
                convexity=5);
         }
    }
}

/*
 *    polyScrewThread.scad    by aubenc @ Thingiverse
 *
 * This script contains the library modules that can be used to generate
 * threaded rods, screws and nuts.
 *
 * http://www.thingiverse.com/thing:8796
 *
 * CC Public Domain
 */

module screw_thread(od,st,lf0,lt,rs,cs)
{
    or=od/2;
    ir=or-st/2*cos(lf0)/sin(lf0);
    pf=2*PI*or;
    sn=floor(pf/rs);
    lfxy=360/sn;
    ttn=round(lt/st)+1;
    zt=st/sn;

    intersection()
    {
        if (cs >= -1)
        {
            thread_shape(cs,lt,or,ir,sn,st);
        }

        full_thread(ttn,st,sn,zt,lfxy,or,ir);
    }
}

module hex_nut(df,hg,sth,clf,cod,crs)
{

    difference()
    {
        hex_head(hg,df);

        hex_countersink_ends(sth/2,cod,clf,crs,hg);

        screw_thread(cod,sth,clf,hg,crs,-2);
    }
}

module hex_screw(od,st,lf0,lt,rs,cs,df,hg,ntl,ntd)
{
    ntr=od/2-(st/2+0.1)*cos(lf0)/sin(lf0);

    union()
    {
        hex_head(hg,df);

        translate([0,0,hg])
        if ( ntl == 0 )
        {
            cylinder(h=0.01, r=ntr, center=true);
        }
        else
        {
            if ( ntd == -1 )
            {
                cylinder(h=ntl+0.01, r=ntr, $fn=floor(od*PI/rs), center=false);
            }
            else if ( ntd == 0 )
            {
                union()
                {
                    cylinder(h=ntl-st/2,
                             r=od/2, $fn=floor(od*PI/rs), center=false);

                    translate([0,0,ntl-st/2])
                    cylinder(h=st/2,
                             r1=od/2, r2=ntr,
                             $fn=floor(od*PI/rs), center=false);
                }
            }
            else
            {
                cylinder(h=ntl, r=ntd/2, $fn=ntd*PI/rs, center=false);
            }
        }

        translate([0,0,ntl+hg]) screw_thread(od,st,lf0,lt,rs,cs);
    }
}

module thread_shape(cs,lt,or,ir,sn,st)
{
    if ( cs == 0 )
    {
        cylinder(h=lt, r=or, $fn=sn, center=false);
    }
    else
    {
        union()
        {
            translate([0,0,st/2])
              cylinder(h=lt-st+0.005, r=or, $fn=sn, center=false);

            if ( cs == -1 || cs == 2 )
            {
                cylinder(h=st/2, r1=ir, r2=or, $fn=sn, center=false);
            }
            else
            {
                cylinder(h=st/2, r=or, $fn=sn, center=false);
            }

            translate([0,0,lt-st/2])
            if ( cs == 1 || cs == 2 )
            {
                  cylinder(h=st/2, r1=or, r2=ir, $fn=sn, center=false);
            }
            else
            {
                cylinder(h=st/2, r=or, $fn=sn, center=false);
            }
        }
    }
}

module full_thread(ttn,st,sn,zt,lfxy,or,ir)
{
    for(i=[0:ttn-1])
    {
        for(j=[0:sn-1])
        {
            polyhedron(
                  points=[
                          [0,                  0,                  i*st-st            ],
                          [ir*cos((j+1)*lfxy), ir*sin((j+1)*lfxy), i*st+(j+1)*zt-st   ],
                          [ir*cos(j*lfxy),     ir*sin(j*lfxy),     i*st+j*zt-st       ],
                          [or*cos((j+1)*lfxy), or*sin((j+1)*lfxy), i*st+(j+1)*zt-st/2 ],
                          [or*cos(j*lfxy),     or*sin(j*lfxy),     i*st+j*zt-st/2     ],
                          [0,                  0,                  i*st+st            ],
                          [ir*cos((j+1)*lfxy), ir*sin((j+1)*lfxy), i*st+(j+1)*zt      ],
                          [ir*cos(j*lfxy),     ir*sin(j*lfxy),     i*st+j*zt          ]
                         ],
               faces=[
                          [0,1,2],
                          [5,6,3],[5,3,0],[0,3,1],
                          [3,4,1],[1,4,2],
                          [3,6,4],[4,6,7],
                          [0,2,4],[0,4,5],[5,4,7],
                          [5,7,6]
                         ],
               convexity=5);
        }
    }
}

module hex_head(hg,df)
{
    cylinder(h=hg, r=df/2/sin(60), $fn=6, center=false);
}

module hex_countersink_ends(chg,cod,clf,crs,hg)
{
    translate([0,0,-0.1])
    cylinder(h=chg+0.01,
             r1=cod/2,
             r2=cod/2-(chg+0.1)*cos(clf)/sin(clf),
             $fn=floor(cod*PI/crs), center=false);

    translate([0,0,hg-chg+0.1])
    cylinder(h=chg+0.01,
             r1=cod/2-(chg+0.1)*cos(clf)/sin(clf),
             r2=cod/2,
             $fn=floor(cod*PI/crs), center=false);
}

```
compression_covers.scad:
```
use <threadlib/threadlib.scad>
use <knurledFinishLib.scad>

$fn = 360;

// Enable / disable Knurling
knurled = !$preview;

/* [Quality / Accuracy Dimensions] */
// Rough approximation of your extrusion width
nozzle_diameter = 0.4;

// How much 'slew' to allow for external paths to print threads for the bolt. Default is to use half the extrusion width.
bolt_slew = 0.5;

/* [General Dimensions] */
// How thick do you want the exterior parts to be?
thickness = 4;

// How thick should the compression collar (pushed onto the spring) be above the cover?
collar_thickness = 2.75;

/* [Cover Attributes] */
// Do you want the cover fully closed or open?
closed_cover = false;

// If the cover is not fully closed this width is used to calculate how wide the outer wheel is.
outer_ring_width = 25 / 2;
// How wide the cross-bars are.
cross_width = 5;

// Calculate an x-y scale for the bolt to avoid slew.
boltscale = 1 - ((nozzle_diameter * bolt_slew) / 6);

module wheel() {
        union() {
        difference() {
            if (knurled) {
                knurled_cyl(thickness, 60, 3, 3, 1, 2, 50);
            } else {
                cylinder(d = 60, h = thickness);
            }
            if (!closed_cover) {
                translate([0, 0, -0.25]) {
                    difference() {
                        cylinder(d = 60 - outer_ring_width, h = thickness + 0.5);
                        cube([cross_width, 60 - outer_ring_width, thickness * 2 + 1], center = true);
                        rotate([0, 0, 90]) cube([cross_width, 60 - outer_ring_width, thickness * 2 + 1], center = true);
                    }
                }
            }
        }
        cylinder(d = 10, h = thickness + collar_thickness); // protrudes collar_thickness into the spring
    }
}

// Nut side
difference() {
    wheel();
    translate([0, 0, 0]) tap("M6", length = thickness + collar_thickness, higbee_arc=90);
}

// screw side
translate([75, 0, 0]) {
    difference() {
        wheel();
        translate([0, 0, 2.25])
            cylinder(d = 6.3 + nozzle_diameter, h = thickness * 2 + 1);
        intersection() {
            cylinder(d = 9 + nozzle_diameter, h = 2.25);
            translate([-(5 + nozzle_diameter) / 2, -5, 0]) cube([5 + nozzle_diameter, 10, 2.25]);
        }
    }
}

// Horizontal orientation for the bolt to print in a 'strong' manner, with scaling to adjust for extruder diameter.
translate([-45, 0, 2.5]) {
    rotate([-90, 0, 0])
    rotate([0, 0, 90])
    intersection() {
        union() {
            cylinder(d = 9, h = 2, $fn = 360);
            rotate([0, 0, 45]) scale([boltscale, boltscale, 1])
                bolt("M6", length = (thickness * 2) + 16, higbee_arc=30, leadin=1);
        }
        cube([5, 10, ((thickness * 2) + 16) * 2], center = true);
    }
}

```
omlopp_top.scad:
```
use <threadlib/threadlib.scad>

extrusion_d = 0.45;

wall = 2.75;
// 68.5 x 7
omloppD = 68.5 + extrusion_d;

difference() {
    hull() {
        cylinder(d = omloppD + wall * 2, h = 10, $fn = 360);
        translate([0, 0, 10]) cylinder(d1 = omloppD + wall * 2, d2 = omloppD + wall * 2 - 4, h = 2, $fn = 360);
        translate([omloppD + wall, 0, 0]) {
            cylinder(d = omloppD + wall * 2, h = 10, $fn = 360);
            translate([0, 0, 10]) cylinder(d1 = omloppD + wall * 2, d2 = omloppD + wall * 2 - 4, h = 2, $fn = 360);
        }
    }

    // Hollow for the OMLOPPs
    translate([0, 0, -0.5]) {
        cylinder(d = omloppD, h = 7.5, $fn = 360);
        // mounting locations are at 55mm OC
        // We'll tap these so we can use M2x4 cap head screws
        rotate([0, 0, 45]) translate([55 / 2, 0, 7.5]) tap("M2", length = 4);
        rotate([0, 0, 45]) translate([-55 / 2, 0, 7.5]) tap("M2", length = 4);

        translate([omloppD + wall, 0, 0]) {
            cylinder(d = omloppD, h = 7.5, $fn = 360);
            translate([55 / 2, 0, 7.5]) tap("M2", length = 4);
            translate([-55 / 2, 0, 7.5]) tap("M2", length = 4);
        }

        // Hollow out the back for the connection
        cube([omloppD + wall, omloppD / 2 - 3, 7.5]);
    }

    // 8mm hole for the wires
    translate([(omloppD + wall) / 2, (omloppD + wall) / 2 - 8 - 3 - wall , 7.5]) {
        rotate([-45, 0, 0])
            cylinder(d = 8 + extrusion_d, h = 30, $fn = 360, center = true);
    }

    // 3x7.4mm cube that goes 3mm into the wall. for the sleeve to lock into
    translate([(omloppD + wall) / 2, 0, 10 / 2 - 3 / 2]) {
        translate([0, omloppD / 2 - 3, 0]) {
            translate([-7.5 / 2, wall, -1.625]) cube([7.55, 3.25, 3.25]);

            // then 3mm hold for the M3 screw.
            rotate([-90, 0, 0]) cylinder(d = 3, h = wall + 3, $fn = 90);
        }
    }

}
```


[User]
Hey there, I'm looking to create some stackable risers for tabletop miniatures, and I'd like them to be customizable. I've got some specific ideas for how they should work, but I need help generating the OpenSCAD code.

Basically, the risers should be cubes with hollowed-out legs and a slightly smaller top bump that fits into the bottom of another riser so they can stack. The risers need to come in multiple sizes, representing different creature sizes in a tabletop RPG (think D&D). I want to be able to specify the base size, height, leg width, and a small "fit adjustment" value to make stacking work well, and whether I want to include diagonal braces between the legs.

Here's a more detailed breakdown of the parameters I'd like to control:

*   **Token Size:** This will determine the base dimensions of the riser. I'd like to be able to choose from predefined sizes like "medium" (1 inch square), "large" (2 inches square), "huge" (3 inches square), and "gargantuan" (4 inches square). This should also be settable in inches directly.
*   **Riser Height:** This will determine the height of the riser. I'd like to use common RPG elevation measurements, so I'd like to be able to specify heights as 5ft, 10ft, 20ft, or 40ft, but I also want to be able to specify this height directly in inches. Note that in miniature scale 5ft is 1 inch.
*   **Leg Width:**  This is the width of the legs, measured in millimeters. I should be able to specify this directly.
*   **Fit Adjustment:**  This is a small adjustment to the size of the top bump.  It should slightly smaller than the hole in the bottom to allow stacking. This should be in millimeters.
*   **Include Braces:** This is a boolean to determine whether to add diagonal braces to connect the legs.

For the design, the main body should be a cube, and then we subtract from it to create the leg holes, both vertically and horizontally. There should be one rectangular cut out of the bottom to allow the top bump of another riser to fit in, and that bump needs to be slightly smaller than the bottom hole. The braces, when included, should attach diagonally between legs.

I would like a single SCAD file, and I'm not using any libraries at this point.  Thanks for your help!

[Assistant]
stackable_combat_risers_scad.scad:
```
$fa = 1;
$fs = 0.4;
inch = 25.4;
medium = 1 * inch;
large = 2 * inch;
huge = 3 * inch;
gargantuan = 4 * inch;
h5 = 1 * inch;
h10 = 2 * inch;
h20 = 4 * inch;
h40 = 8 * inch;

// Token size to create in inches (1=medium, 2=large, 3=huge, 4=gargantuan)
token_size_inches = 1;
// Token height to create in inches (1=5ft, 2=10ft, 4=20ft, 8=40ft)
riser_height_inches = 2;
// Size of the legs in mm
leg_width = 4;
// Extra space around each side of top square to help fit (in mm)
fit_adj = 0.2; // [0.15, 0.2, 0.25]
// Whether to include braces (1=include)
include_braces = 0; //[1, 0]

token_size = token_size_inches * inch;
riser_height = riser_height_inches * inch;

// Model
module riser(size=medium, height=h5, leg_width = leg_width, fit_adj=0.1, include_braces=include_braces) {
    // size = the size of the square in the x and y direction.  For D&D, medium is 1x1
    //        inch, which is 25.4mm, large is 2x2, huge is 3x3 and gargantuan is 4x4
    // height = the height of the riser.  In D&D, every 5 feet is one inch in miniature
    //          scale
    // leg_width = the size of the leg (in x and y) measured in millimeters
    // fit_adj = the small amount to make the top bump smaller in order to ensure that the
    //           stacking works.  If the top bump is exactly the size of the bottom opening,
    //           it won't fit in.  The fit_adj is added around every side to allow more
    //           clearance for the parts to stack.  So, a fit_adj of 0.1 will make the top
    //           bump smaller by 0.2 in both x and y (because 0.1 is applied to both sides).
    epsilon = 1; // this just makes sure solids intersect so openscad knows they are combined
                 // (OpenSCAD implicitly "union"s separate volumes so there won't be interior walls
                 // or anything.
    module core(size=size, height=height) {
        cube([size, size, height], center=false);
    }
    module cut_x(size=size, height=height, leg_width = leg_width, fit_adj=fit_adj, epsilon=epsilon) {
        // this will cut the holes in the core cube in the X direction (both sides)
        translate([(-1*epsilon), leg_width, leg_width])
            cube([size+(2*epsilon),
                  size-(2*leg_width),
                  height-(2*leg_width)], center = false);
    }
    module cut_y(size=size, height=height, leg_width = leg_width, fit_adj=fit_adj, epsilon=epsilon) {
        // this will cut the holes in the core cube in the Y direction (both sides)
        translate([leg_width, (-1*epsilon), leg_width])
            cube([size-(2*leg_width),
                  size+(2*epsilon),
                  height-(2*leg_width)], center = false);
    }
    module cut_z(size=size, height=height, leg_width = leg_width, fit_adj=fit_adj, epsilon=epsilon) {
        // this will cut a hole in the core cube in just the bottom face, not the top
        translate([leg_width, leg_width, (-1*epsilon)])
            cube([size-(2*leg_width),
                  size-(2*leg_width),
                  // on this line below, you would say
                  // height + (2*epsilon) if we wanted to
                  // also cut the top face
                  leg_width+(2*epsilon)], center = false);
    }
    module top_bump(size=size, height=height, leg_width = leg_width, fit_adj=fit_adj, epsilon=epsilon) {
        translate([leg_width+fit_adj, leg_width+fit_adj, height-epsilon])
            cube([size-(2*leg_width)-(2*fit_adj),
                  size-(2*leg_width)-(2*fit_adj),
                  leg_width+epsilon], center=false);
    }
    module brace(size=size, height=height, leg_width=leg_width, side=1) {
        inner_triangle_a = size-(2*leg_width);
        inner_triangle_c = height-(2*leg_width);
        inner_triangle_hypotenuse = sqrt(pow(inner_triangle_a,2)+pow(inner_triangle_c,2));
        angle = acos((pow(inner_triangle_hypotenuse,2)+pow(inner_triangle_a,2)-pow(inner_triangle_c,2))/(2*inner_triangle_hypotenuse*inner_triangle_a));
        if(side==1){
            translate([leg_width/2,0,leg_width])
                rotate([0,90-angle,0])
                    cube([leg_width, leg_width, inner_triangle_hypotenuse+leg_width]);
        }
        if(side==2){
            translate([size-leg_width,leg_width/2,leg_width])
                rotate([270+angle,0,0])
                    cube([leg_width, leg_width, inner_triangle_hypotenuse+leg_width]);
        }
        if(side==3){
            translate([size-(leg_width),size-leg_width,0])
                rotate([0,-90+angle,0])
                    cube([leg_width, leg_width, inner_triangle_hypotenuse+leg_width]);
        }
        if(side==4){
            translate([0,size-(leg_width/2),leg_width])
                rotate([0,90-angle,270])
                    cube([leg_width, leg_width, inner_triangle_hypotenuse+leg_width]);
        }
    }

    union() {
        difference() {
            difference() {
                difference() {
                    core();
                    cut_x();
                }
                cut_y();
            }
            cut_z();
        }
        top_bump();
    }
    if(include_braces){
        brace(side=1);
        brace(side=2);
        brace(side=3);
        brace(side=4);
    }
}

// Create the single object this script will generate
riser(size=token_size, height=riser_height, leg_width=leg_width, fit_adj=fit_adj);

// Create all the sizes
/*
riser(size=medium, height=h5, leg_width=leg_width, fit_adj=fit_adj);

translate([110,0,0])
    riser(size=medium, height=h10, leg_width=leg_width, fit_adj=fit_adj);
translate([220,0,0])
    riser(size=medium, height=h20, leg_width=leg_width, fit_adj=fit_adj);
translate([330,0,0])
    riser(size=medium, height=h40, leg_width=leg_width, fit_adj=fit_adj);

translate([0,50 ,0])
    riser(size=large, height=h5, leg_width=leg_width, fit_adj=fit_adj);
translate([110,50 ,0])
    riser(size=large, height=h10, leg_width=leg_width, fit_adj=fit_adj);
translate([220,50 ,0])
    riser(size=large, height=h20, leg_width=leg_width, fit_adj=fit_adj);
translate([330,50 ,0])
    riser(size=large, height=h40, leg_width=leg_width, fit_adj=fit_adj);

translate([0,120 ,0])
    riser(size=huge, height=h5, leg_width=leg_width, fit_adj=fit_adj);
translate([110,120 ,0])
    riser(size=huge, height=h10, leg_width=leg_width, fit_adj=fit_adj);
translate([220,120 ,0])
    riser(size=huge, height=h20, leg_width=leg_width, fit_adj=fit_adj);
translate([330,120 ,0])
    riser(size=huge, height=h40, leg_width=leg_width, fit_adj=fit_adj);

translate([0,225 ,0])
    riser(size=gargantuan, height=h5, leg_width=leg_width, fit_adj=fit_adj);
translate([110,225 ,0])
    riser(size=gargantuan, height=h10, leg_width=leg_width, fit_adj=fit_adj);
translate([220,225 ,0])
    riser(size=gargantuan, height=h20, leg_width=leg_width, fit_adj=fit_adj);
translate([330,225 ,0])
    riser(size=gargantuan, height=h40, leg_width=leg_width, fit_adj=fit_adj);
*/

```


[User]
I'd like a parametric OpenSCAD design for a flower based on the "Prilblume" from the 1970s. It should have a central stigma, stamen, and multiple layers of petals that can be customized.

Here are the parameters I'd like to be able to control:

*   **Number of petal layers:** (integer, at least 1, not including the stigma and stamen layers)
*   **Base petal diameter:** (float, diameter of a single petal on the first layer; all other petal sizes are derived from this)
*   **Layer height:** (float, height of each layer, constant across layers)
*   **Layer twist:** (float, rotation in degrees for each successive layer)
*   **Layer fill:** (boolean, whether the layers should have a central fill or remain open, which can save on filament)
*   **Color change:** (integer, a factor used to create color changes through the flower, in the range 1-99. Should be used with `hsv` function.)
*   **Label text:** (string, text to be placed on the model - can be left empty if not wanted).
*   **Font:** (string, name of font for label text). Should be configurable to include font styles (e.g. "Arial:style=Italic").
*  **Font size:** (float, size of the label text).
*   **Text tip height:** (float, height of the label text above the topmost layer).
*   **Export layer:** (integer, select a layer to export separately, set to 0 to export everything together)
*   **Export label only:** (boolean, toggle to export label only, ignoring layer export setting)
*   **Label cut-out offset:** (float, offset for label cutouts when exporting individual layers, for easier part attachment)
*   **Number of fragments:** (integer, $fn, control smoothness, default 70)

The design should be built using the `linear_extrude` module. The flower should have a stigma, a stamen, and then multiple layers of petals. The petals should all be based on circles, and their relative position in each layer should be rotated around the Z axis. The layers should be stacked on top of each other with the `translate` module. Color changes for the different parts of the flower are controlled by the `hsv` function, and the colors should be different for each layer. The label should be printed on top of the entire flower, with the height controlled by `text_tip_height`.

I'd like the ability to export the entire flower, or specific layers individually, or only the label text. If an individual layer is exported, the label text should be cut out from it.

Please include the `hsv` and `doHsvMatrix` functions in the code as well.

It would be nice to have the customizer set to the original design properties initially, too.

[Assistant]
prilblume.scad:
```
/*
Flower Power (Prilblume)

by IOIO72 aka Tamio Patrick Honma (https://honma.de)

This work is licensed under the Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License. To view a copy of this license, visit http://creativecommons.org/licenses/by-nc-sa/4.0/ or send a letter to Creative Commons, PO Box 1866, Mountain View, CA 94042, USA.

The "Pril-Blume" is a geometric representation of a flower and an iconic part of a campaign in the 1970s for Henkel's dishwashing liquid Pril. These flowers were stickers that accompanied the labels of the bottles. The stickers were very popular and still known as a retro piece of pop art.
*/

/* [Flower] */

// Set number of petal layers in addtion to stigma and stamen. Set at least 1.
layer_count = 2;

// Set the original diameter of one petal of the first layer, which is the calculation basis for the other layers.
petal_diameter = 7;

// Set height of each layer
layer_height = 0.5;

// Set rotation twist for each layer
layer_twist = 22.5;

// Decide to fill the layers' center. Disable to save some filament.
layer_fill = true;

// Define the color change factor
color_change = 72; // [1:99]

/* [Label text] */

// Enter your desired text. Leave empty, if you don't want to use a label.
label = "";

// Enter the name of a font, which is installed on your computer. You might also add a font style. Example: "Arial" or "Arial:style=Italic". Use the font list function in the help menu, copy your desired font from there and paste it here without quotation marks.
font = "Brush Script MT";

// Set a font size. Try not to exceed the bottom petal layer as the text should be part of the model.
size = 14;

// Set the height of the label text on top of the stigma layer.
text_tip_height = 0.75;

/* [Select part to export] */

// Select a layer for separated print export. Set to 0 to display all layers. Note: This value should not exceed the number of layers you've set in "layer_count" (see above) if you use a label text.
select_layer = 0;

// Select text label only. This only makes sense, if you've set a label text (see above). Note: The selected layer from above will be ignored, if you select the label text.
select_label = false;

/* [Advanced] */

// Set offset for text cut outs for better part attachment. This affects only separated part exports by using the "Select part to export" feature.
label_cutout_offset = 0.1;

// Set number of fragments to render
$fn = 70; // [1:100]

/*
BlocksCAD functions
*/
function doHsvMatrix(h,s,v,p,q,t,a=1)=[h<1?v:h<2?q:h<3?p:h<4?p:h<5?t:v,h<1?t:h<2?v:h<3?v:h<4?q:h<5?p:p,h<1?p:h<2?p:h<3?t:h<4?v:h<5?v:q,a];
function hsv(h, s=1, v=1,a=1)=doHsvMatrix((h%1)*6,s<0?0:s>1?1:s,v<0?0:v>1?1:v,v*(1-s),v*(1-s*((h%1)*6-floor((h%1)*6))),v*(1-s*(1-((h%1)*6-floor((h%1)*6)))),a);

/*
Modules
*/

module fill(_layer, _diameter, _height) {
  linear_extrude(_height, center = true) {
    circle(d = (_diameter * _layer / 1.5));
  };
};

module stigma(_diameter, _height) {
  linear_extrude(_height, center = true) {
    circle(d = _diameter);
  };
};

module stamen(_diameter, _height) {
  linear_extrude(_height, center = true) {
    for (i = [1:4]) {
      rotate([0, 0, i * 360 / 4]) {
        translate([_diameter / 2, 0, 0]) {
          circle(d = _diameter);
        };
      };
    };
  };
};

module petal(_layer, _diameter, _height) {
  linear_extrude(_height, center = true) {
    for (i = [1:8]) {
      rotate([0, 0, i * 360 / 8]) {
        translate([_diameter * _layer / 2, 0, 0]) {
          circle(d = _diameter * _layer / 2);
        };
      };
    };
  };
};

module petal_layer(_layer, _count, _twist, _change, _diameter, _height, _fill = false) {
  translate([0, 0, (_count + 1 - _layer) * _height]) {
    rotate([0, 0, _layer * _twist]) {
      color(hsv(.01 * ((_layer + 2) * _change))) {
        petal(_layer + 1, _diameter, _height);
        if (_fill) {
          fill(_layer + 1, _diameter, _height);
        };
      };
    };
  };
};

module label_layer(_text, _font, _size, _tip_height, _layer_height, _layer_count, _offset = 0) {
  translate([0, 0, _layer_height - _layer_height / 2]) {
    linear_extrude((_layer_count + 2) * _layer_height + _tip_height) {
      offset(r = _offset)
      text(_text, _size, _font, halign="center", valign="center");
    };
  };
};

/*
Main
*/

if (label != "" && (select_layer <= 0 || select_label == true)) color(hsv(.01 * -1 * color_change)) label_layer(label, font, size, text_tip_height, layer_height, layer_count);

if (select_label == false && (select_layer <= 0 || select_layer == 1)) {
  difference() {
    translate([0, 0, (layer_count + 2) * layer_height]) {
      color(hsv(.01 * color_change)) {
        stigma(petal_diameter, layer_height);
      };
    };
    if (label != "") label_layer(label, font, size, text_tip_height, layer_height, layer_count, select_layer > 0 ? label_cutout_offset : 0);
  };
};

if (select_label == false && (select_layer <= 0 || select_layer == 2)) {
  difference() {
    translate([0, 0, (layer_count + 1) * layer_height]) {
      color(hsv(.01 * 2 * color_change)) {
        stamen(petal_diameter, layer_height);
      };
    };
    if (label != "") label_layer(label, font, size, text_tip_height, layer_height, layer_count, select_layer > 0 ? label_cutout_offset : 0);
  };
};

if (select_label == false && select_layer <= 0) {
  for (i = [1:layer_count]) {
    difference() {
      petal_layer(i, layer_count, layer_twist, color_change, petal_diameter, layer_height, layer_fill);
      if (label != "") label_layer(label, font, size, text_tip_height, layer_height, layer_count, select_layer > 0 ? label_cutout_offset : 0);
    };
  };
};

if (select_label == false && select_layer > 2) {
  difference() {
    petal_layer(select_layer - 2, layer_count, layer_twist, color_change, petal_diameter, layer_height, layer_fill);
    if (label != "") label_layer(label, font, size, text_tip_height, layer_height, layer_count, select_layer > 0 ? label_cutout_offset : 0);
  };
};

```


[User]
Hey, I'm looking to design a customizable, clippable storage box in OpenSCAD, similar to Lego bricks. I've seen some designs out there but want something I can really tweak to fit my needs.

Here’s what I need:

**Core Functionality:**

*   **Box Dimensions:** I want to define the box size in terms of "bricks" along the X, Y, and Z axes. For instance, a box could be 3x4x5 bricks tall. I should be able to set this with a `BoxXyzDimensionsInBricks` variable.
*   **Clippable Design:** The box should have the same "clippable" studs on the top surface as standard Lego bricks so that it can connect with other compatible parts. The bottom should have the corresponding hollows to connect to such studs.
*   **Thin Wall Option:** The box should have an option for thin walls, which can be toggled via a `UseThinWall` variable (true/false). If false, then a thicker wall should be used. I also need to be able to specify the wall thickness with a `BoxThinWallWidthInMM` variable.

**Detailed Features:**

*   **Brick Dimensions:** The bricks should adhere to the following dimensions (in mm):
    *   SingleBrickOuterWidthInMM: 8
    *   SingleLayerBrickBodyHightInMM: 9.6/3 (3.2)
    *   BrickHeadHightInMM: 1.8
    *   BrickHeadDiameterInMM: 4.94
    *   BrickHeadRoundingDiameterInMM: 1.2
    *   HeadHolderDistanceOriginalInMM: 4.95
    *   OuterBrickWallReductionInMM: 0.2
*   **Box Cap:** I need a separate module to generate a "cap" for the box. The cap will be one layer of bricks in X and Y, but only one brick layer (in Z direction).
*   **Box Body:** I need a module to generate the box body. The body should have the same clippable studs on the top and the appropriate hollows on the bottom.
*   **Wall Treatment:** The thin wall version should have an additional structure for support. If the option for the thin wall is selected, the interior walls should be cut out according to `BoxThinWallWidthInMM`, and the outer wall dimensions should be reduced by `OuterBrickWallReductionInMM`. The outer walls should have studs, and a hollowed base that provides the clippability.
*   **Rendering:** The rendering process should be fast, so that design changes can be seen quickly. The $fn variable should be related to the `FastRenderingFactor` variable.

**Modules:**

*   `3dBrickBoxCap()`: Generates the box cap.
*   `3dBrickBoxHull(UseThinWall=false)`: Generates the box body.
*   `3dBoxHeads()`: Generates the clippable studs on the top of the box.
*  `3dBoxOuterHull()`: Generates the outer walls of the box body, not including heads or any internal structure.
*  `3dBoxThinWallHollowCut()`: Generates the internal cuts for thin wall boxes.
*  `3dFinalEdgeCutter()`: Generates the additional cuts needed to make thin walls.
*  `3dSmallWallCutterBody()`: Generates internal cutting object in thin wall boxes.
*  `3dWallWidthAdjustmentCutRaw()`: Generates cutting object to properly scale down the internal structures of thin wall boxes.
*   `3dBoxHollowCut()`: Generates the basic internal cut for hollow box.
*   `3dLowerGroundCutter()`: Generates the cut at the base of the box.
*   `3dBrickWithXyzElementNumber(BrickXyzElementNumbers, PrintBedHolderEnabled = false)`: generates the base brick object with studs and hollows
*  `3dEdge2PrintBedHolder(BrickXyzElementNumbers)`: Generates the object to be printed as a brim in 3D printing to avoid warping
*  `3dSingleEdge2PrintBedHolder()`: Generates a single corner piece to be used by 3dEdge2PrintBedHolder
*   `3dBrickHeads(BrickXyzElementNumbers)`: generates the studs on the base brick
*   `3dBrickHolders(BrickXyzElementNumbers)`: generates the negative form of the studs
*   `3dBrickGroundFloorCutter(BrickXyzElementNumbers)`: Cuts the base of the base brick object
*   `3dLowerBrickSolidBodyShape(BrickXyzElementNumbers)`: Generates the outer walls of the base brick object.
*   `3dLowerBrickHollowCutter(BrickXyzElementNumbers)`: Generates the interior cuts of the base brick object.
*   `3dBrickHeadShape(HeadDiameterInMM=BrickHeadDiameterInMM)`: Generates the shape of the stud.
*   `2dSingleSideBrickHead(HeadDiameterInMM)`: Generates the 2D profile of the brick stud to be used by 3dBrickHeadShape
*  `2dBrickHeadEdgeCutter()`: Generates a 2D cut to be used by the 2dSingleSideBrickHead
*   `3dHeadHolderStructure(HeadHolderDistanceInMM, ExtraLengthInMM = 0)`: generates the shape of the hollow on the bottom side of the brick to be used by 3dBrickHolders
*  `3dSingleHeadHolderStick(HeadHolderDistanceInMM, ExtraLengthInMM = 0)`: generates a single stick to be used by 3dHeadHolderStructure
*   `3dSingleLowerBodyHollowCutter(Layers, center = true)`: Generates the basic interior cut for the base brick object.

**Parameters:**

*   `TestBoxXyzDimmenstionInBricks = [4, 5, 6]` (Example test dimensions)
*   `MyBoxXyzDimensionsInBricks = [3*4, 3*4, 3*7]` (Example of final dimensions)
*  `SmallBoxXyzDimmenstionInBricks = [30, 23, 34]` (Example of other set of dimensions)
*   `BoxXyzDimensionsInBricks = MyBoxXyzDimensionsInBricks` (Variable that chooses the dimensions of the current design)
*  `BoxThinWallWidthInMM = 2` (Variable of the wall thickness in thin wall mode)
*   `UseThinWall = true/false` (Toggles between thin and thick walls)
*   `FastRenderingFactor = 2/9` (Parameter to control speed of rendering).
*   `FirstLevelHightInMM = 0.2` (Parameter for 3D printing).
*   `SinglePrinterLevelHightInMM = 0.2` (Parameter for 3D printing).
*  `ExtraCutLengthInMM            = 0.1` (Parameter for 3D printing)
*   `SingleBrickOuterWidthInMM = 8` (Parameter, already specified above).
*   `SingleLayerBrickBodyHightInMM = 9.6/3` (Parameter, already specified above).
*   `BrickHeadHightInMM = 1.8` (Parameter, already specified above).
*   `BrickHeadDiameterInMM = 4.94` (Parameter, already specified above).
*   `BrickHeadRoundingDiameterInMM = 1.2` (Parameter, already specified above).
*   `HeadHolderXyzDimenstionsInMM = [2.7, 0.5, 1.8]` (Parameter for clippability).
*   `HeadHolderDistanceOriginalInMM = 4.95` (Parameter for clippability).
*   `HeadHolderDistanceInMM = HeadHolderDistanceOriginalInMM` (Parameter for clippability)
*  `OuterBrickWallReductionInMM = 0.2` (Parameter that accounts for how much the outer wall shrinks on each side)
*   `NormalBrickXyzDimension = [4, 2, 3]` (Parameter that is used in 3dBrickWithXyzElementNumber)
* `BrickXyzElementNumbers = NormalBrickXyzDimension` (Parameter that is used in 3dBrickWithXyzElementNumber)
*  `SupportForCorners = false` (Parameter for corner support)

**Libraries:** I don't believe that any additional libraries are needed.

Could you help me create this design? Thanks a lot!

[Assistant]
ClippableBrickBoxForThingiverse.scad:
```
//Cusomizable, PLA Based Clippable Brick Box Design by SeppoTheFish >\\\>
//License: Creative Commons (4.0 International License), Attribution-NonCommercial
//
//Instructions:
//+ Select size of box by modifying "BoxXyzDimensionsInBricks"
//+ Create .stl file for Box Cover by use of module "3dBrickBoxCap"
//+ Create .stl file for Box by use of module "3dBrickBoxWithThinWallsHull"

//Parameters:
TestBoxXyzDimmenstionInBricks = [4, 5, 6];
MyBoxXyzDimensionsInBricks = [3*4, 3*4, 3*7];
SmallBoxXyzDimmenstionInBricks = [30, 23, 34];
BoxXyzDimensionsInBricks = MyBoxXyzDimensionsInBricks;
BoxThinWallWidthInMM = 2;
UseThinWall = true;

3dBrickBoxHull(UseThinWall);   //Uncomment (remove "//") to generate Box body
//3dBrickBoxCap();  //Uncomment (remove "//") to generate Box Cap

module 3dBrickBoxCap()
{
  3dBrickWithXyzElementNumber( [BoxXyzDimensionsInBricks.x, BoxXyzDimensionsInBricks.y, 1]);
}

module 3dBrickBoxHull(UseThinWall=false)
{
  3dBoxHeads();
  difference()
  {
    union()
    {
      difference()
      {
        3dBoxOuterHull();
        if (UseThinWall) 3dBoxThinWallHollowCut();
        else 3dBoxHollowCut();
        3dLowerBrickHollowCutter( [BoxXyzDimensionsInBricks.x, BoxXyzDimensionsInBricks.y, 1] );
      }
      3dBrickHolders(BoxXyzDimensionsInBricks);
    }
    3dLowerGroundCutter();
  }
}

module 3dBoxHeads()
{
  for (XElementNumber = [0:BoxXyzDimensionsInBricks.x-1])
  {
    for (YElementNumber = [0:BoxXyzDimensionsInBricks.y-1])
    {
      if (   (XElementNumber == 0)
          || (XElementNumber == BoxXyzDimensionsInBricks.x-1)
          || (YElementNumber == 0)
          || (YElementNumber == BoxXyzDimensionsInBricks.y-1)
         )
      {
        translate([  XElementNumber*GetParameter("SingleBrickOuterWidthInMM")+GetParameter("SingleBrickOuterWidthInMM")/2-GetParameter("OuterBrickWallReductionInMM")
                   , YElementNumber*GetParameter("SingleBrickOuterWidthInMM")+GetParameter("SingleBrickOuterWidthInMM")/2-GetParameter("OuterBrickWallReductionInMM")
                   , (BoxXyzDimensionsInBricks.z-1)*GetParameter("SingleLayerBrickBodyHightInMM")])
        3dBrickHeadShape();
      }
      else
      {
        translate([  XElementNumber*GetParameter("SingleBrickOuterWidthInMM")+GetParameter("SingleBrickOuterWidthInMM")/2-GetParameter("OuterBrickWallReductionInMM")
                   , YElementNumber*GetParameter("SingleBrickOuterWidthInMM")+GetParameter("SingleBrickOuterWidthInMM")/2-GetParameter("OuterBrickWallReductionInMM")
                   , GetParameter("SingleLayerBrickBodyHightInMM")])
        3dBrickHeadShape();
      }
    }
  }
}

module 3dBoxOuterHull()
{
  translate([0,0,-GetParameter("SingleLayerBrickBodyHightInMM")])
  cube([    GetParameter("SingleBrickOuterWidthInMM")*(BoxXyzDimensionsInBricks.x)
          - 2*GetParameter("OuterBrickWallReductionInMM")
        ,   GetParameter("SingleBrickOuterWidthInMM")*(BoxXyzDimensionsInBricks.y)
          - 2*GetParameter("OuterBrickWallReductionInMM")
        , GetParameter("SingleLayerBrickBodyHightInMM")*(BoxXyzDimensionsInBricks.z)] );
}

module 3dBoxThinWallHollowCut()
{
  3dBoxHollowCut();
  translate([    GetParameter("SingleBrickOuterWidthInMM")*(BoxXyzDimensionsInBricks.x/2)
               - GetParameter("OuterBrickWallReductionInMM")
             ,   GetParameter("SingleBrickOuterWidthInMM")*(BoxXyzDimensionsInBricks.y/2)
               - GetParameter("OuterBrickWallReductionInMM")
             , GetParameter("SingleLayerBrickBodyHightInMM")])
  difference()
  {
    union()
    {
      translate([0,0,GetParameter("SingleLayerBrickBodyHightInMM")*(BoxXyzDimensionsInBricks.z-3)])
      mirror([0,0,1])
        3dWallWidthAdjustmentCutRaw();
      3dSmallWallCutterBody();
      3dWallWidthAdjustmentCutRaw();
    }
    3dFinalEdgeCutter();
  }
}

module 3dFinalEdgeCutter()
{
  XLengthInMM =  GetParameter("SingleBrickOuterWidthInMM")*(BoxXyzDimensionsInBricks.x+1)
               - 2*BoxThinWallWidthInMM-2*GetParameter("OuterBrickWallReductionInMM");
  YLengthInMM =  GetParameter("SingleBrickOuterWidthInMM")*(BoxXyzDimensionsInBricks.y+1)
               - 2*BoxThinWallWidthInMM-2*GetParameter("OuterBrickWallReductionInMM");
  ZLengthInMM =   GetParameter("SingleLayerBrickBodyHightInMM")*(BoxXyzDimensionsInBricks.z);
  translate([0,0,(ZLengthInMM/2- GetParameter("SingleLayerBrickBodyHightInMM"))])
  {
    difference()
    {
      cube([  XLengthInMM
            , YLengthInMM
            , ZLengthInMM], center=true);
      cube([  (XLengthInMM-GetParameter("SingleBrickOuterWidthInMM"))
            , (YLengthInMM-GetParameter("SingleBrickOuterWidthInMM"))
            , ZLengthInMM+GetParameter("SingleLayerBrickBodyHightInMM")], center=true);
    }
  }
}

module 3dSmallWallCutterBody()
{
  XLengthInMM =  GetParameter("SingleBrickOuterWidthInMM")*(BoxXyzDimensionsInBricks.x)
               - 1*BoxThinWallWidthInMM;
  YLengthInMM =  GetParameter("SingleBrickOuterWidthInMM")*(BoxXyzDimensionsInBricks.y)
               - 1*BoxThinWallWidthInMM;
  ZLengthInMM =   GetParameter("SingleLayerBrickBodyHightInMM")*(BoxXyzDimensionsInBricks.z-3)
                -2*(GetParameter("SingleBrickOuterWidthInMM")-BoxThinWallWidthInMM/2);
  translate([0,0,(ZLengthInMM/2+GetParameter("SingleBrickOuterWidthInMM")-BoxThinWallWidthInMM/2)])
    cube([  XLengthInMM
          , YLengthInMM
          , ZLengthInMM], center=true);
}

module 3dWallWidthAdjustmentCutRaw()
{
  XLengthInMM =  GetParameter("SingleBrickOuterWidthInMM")*(BoxXyzDimensionsInBricks.x-2)
               + 2*GetParameter("OuterBrickWallReductionInMM");
  YLengthInMM =  GetParameter("SingleBrickOuterWidthInMM")*(BoxXyzDimensionsInBricks.y-2)
               + 2*GetParameter("OuterBrickWallReductionInMM");
  ScaleXFactor = (XLengthInMM+2*GetParameter("SingleBrickOuterWidthInMM")) / XLengthInMM;
  ScaleYFactor = (YLengthInMM+2*GetParameter("SingleBrickOuterWidthInMM")) / YLengthInMM;
  linear_extrude(height=GetParameter("SingleBrickOuterWidthInMM"), scale=[ScaleXFactor, ScaleYFactor])
    square([  XLengthInMM
            , YLengthInMM]
            , center = true);
}

module 3dBoxHollowCut()
{
  translate([   GetParameter("SingleBrickOuterWidthInMM")-2*GetParameter("OuterBrickWallReductionInMM")
              , GetParameter("SingleBrickOuterWidthInMM")-2*GetParameter("OuterBrickWallReductionInMM")
              , GetParameter("SingleLayerBrickBodyHightInMM")])
  cube([    GetParameter("SingleBrickOuterWidthInMM")*(BoxXyzDimensionsInBricks.x-2)
          + 2*GetParameter("OuterBrickWallReductionInMM")
        ,   GetParameter("SingleBrickOuterWidthInMM")*(BoxXyzDimensionsInBricks.y-2)
          + 2*GetParameter("OuterBrickWallReductionInMM")
        , GetParameter("SingleLayerBrickBodyHightInMM")*(BoxXyzDimensionsInBricks.z)] );
}

module 3dLowerGroundCutter()
{
  translate([  -GetParameter("SingleBrickOuterWidthInMM")
             , -GetParameter("SingleBrickOuterWidthInMM")
             , -GetParameter("SingleLayerBrickBodyHightInMM")*2])
  cube([  GetParameter("SingleBrickOuterWidthInMM")*(BoxXyzDimensionsInBricks.x+2)
        , GetParameter("SingleBrickOuterWidthInMM")*(BoxXyzDimensionsInBricks.y+2)
        , GetParameter("SingleLayerBrickBodyHightInMM")*2] );
}

//From ClippableBrick_XxYxZ.scad:
//Cusomizable, PLA Based Clippable Brick Design by SeppoTheFish >\\\>
//License: Creative Commons (4.0 International License), Attribution-NonCommercial

//Parameters:
//OpenScad
FastRenderingFactor = 2/9;
$fn = 180 * FastRenderingFactor;
ExtraCutLengthInMM            = 0.1;
//Printer:
FirstLevelHightInMM         = 0.2;
SinglePrinterLevelHightInMM = 0.2;
//Lego®CompatiblePart:
//LEGO® is a tratemark of LEGO group. This design is not sponsored, approved or supported by LEGO group.
BrickWallWidthInMM             = 0.8;
SingleBrickOuterWidthInMM      = 8;
SingleBrickInnerWidthInMM      = SingleBrickOuterWidthInMM -  2*BrickWallWidthInMM;
SingleLayerBrickBodyHightInMM  = 9.6/3; //3.2 - (1.25/6*3/3); //(1.00/6);//(1.25/6); //1.25/6
                                      //Printer hight granularity does affect hight precison at the end...
BrickHeadHightInMM             = 1.8;
BrickHeadDiameterInMM          = 4.94; // could be tuned baybe by some +0.01 mm.
                                       // reducing it further from 4.94 is to small. A bit bigger might work
                                       // original value: 5.06;
BrickHeadRoundingDiameterInMM  = 1.2;
BrickHeadRoundingRadiusInMM    = BrickHeadRoundingDiameterInMM / 2;
HeadHolderXyzDimenstionsInMM   = [2.7, 0.5, 1.8]; // [3.5, 0.5, 1.8]
HeadHolderDistanceOriginalInMM = 4.95; // 4.95 mm for gentlmen gray PLA filament, 0.2 mm print layer hight.
                                       // Test 4.75 for now. <- for gold PLA filament, maybe 0.3 mm print layer hight.
                                       // 4.73 is already strong, but matching.
HeadHolderDistanceInMM         = HeadHolderDistanceOriginalInMM;
OuterBrickWallReductionInMM    = 0.2; //TODO!!! Verify good value here.

NormalBrickXyzDimension = [4, 2, 3];
BrickXyzElementNumbers = NormalBrickXyzDimension;
SupportForCorners = false; //true

function GetParameter(ParameterName) =
    (ParameterName == "SingleLayerBrickBodyHightInMM")
      ? SingleLayerBrickBodyHightInMM
  : (ParameterName == "SingleBrickOuterWidthInMM")
      ? SingleBrickOuterWidthInMM
  : (ParameterName == "OuterBrickWallReductionInMM")
      ? OuterBrickWallReductionInMM
  : 0 ;

module 3dBrickWithXyzElementNumber(BrickXyzElementNumbers, PrintBedHolderEnabled = false)
{
  3dBrickHeads(BrickXyzElementNumbers);
  difference()
  {
    union()
    {
      3dBrickHolders(BrickXyzElementNumbers);
      difference()
      {
        3dLowerBrickSolidBodyShape(BrickXyzElementNumbers);
        3dLowerBrickHollowCutter(BrickXyzElementNumbers);
      }
      if (PrintBedHolderEnabled) 3dEdge2PrintBedHolder(BrickXyzElementNumbers);
    }
    3dBrickGroundFloorCutter(BrickXyzElementNumbers);
  }
}

module 3dEdge2PrintBedHolder(BrickXyzElementNumbers)
{
  XOffsetInMM = BrickXyzElementNumbers.x*SingleBrickOuterWidthInMM-2*OuterBrickWallReductionInMM;
  YOffsetInMM = BrickXyzElementNumbers.y*SingleBrickOuterWidthInMM-2*OuterBrickWallReductionInMM;
  3dSingleEdge2PrintBedHolder();
  translate([XOffsetInMM, 0          , 0]) rotate([0,0,1*90]) 3dSingleEdge2PrintBedHolder();
  translate([XOffsetInMM, YOffsetInMM, 0]) rotate([0,0,2*90]) 3dSingleEdge2PrintBedHolder();
  translate([0          , YOffsetInMM, 0]) rotate([0,0,3*90]) 3dSingleEdge2PrintBedHolder();

  module 3dSingleEdge2PrintBedHolder()
  {
    translate([0,0,-ExtraCutLengthInMM])
    linear_extrude(FirstLevelHightInMM*2+ExtraCutLengthInMM)
      difference()
      {
        circle(d=BrickHeadDiameterInMM);
        translate([ExtraCutLengthInMM, ExtraCutLengthInMM])
          square(BrickHeadDiameterInMM);
      }
  }
}

module 3dBrickHeads(BrickXyzElementNumbers)
{
  XOffsetInMM = -SingleBrickOuterWidthInMM/2-OuterBrickWallReductionInMM;
  YOffsetInMM = XOffsetInMM;
  for (XElement = [1:BrickXyzElementNumbers.x]) {
    for (YElement = [1:BrickXyzElementNumbers.y]) {
      translate([  XOffsetInMM + XElement * SingleBrickOuterWidthInMM
                 , YOffsetInMM + YElement * SingleBrickOuterWidthInMM
                 , BrickXyzElementNumbers.z*SingleLayerBrickBodyHightInMM])
        render() 3dBrickHeadShape(BrickHeadDiameterInMM);
    }
  }
}

module 3dBrickHolders(BrickXyzElementNumbers)
{
  XStartOffsetInMM = -SingleBrickOuterWidthInMM/2-OuterBrickWallReductionInMM;
  YStartOffsetInMM = XStartOffsetInMM;
  for (XElement = [1:BrickXyzElementNumbers.x]) {
    for (YElement = [1:BrickXyzElementNumbers.y]) {
      translate([  XStartOffsetInMM + XElement * SingleBrickOuterWidthInMM
                 , YStartOffsetInMM + YElement * SingleBrickOuterWidthInMM
                 , -ExtraCutLengthInMM])
        render() 3dHeadHolderStructure(HeadHolderDistanceInMM, ExtraCutLengthInMM);
    }
  }
}

module 3dBrickGroundFloorCutter(BrickXyzElementNumbers)
{
  translate([  -SingleBrickOuterWidthInMM/2
             , -SingleBrickOuterWidthInMM/2
             , -SingleLayerBrickBodyHightInMM * BrickXyzElementNumbers.z])
    cube(  [  (SingleBrickOuterWidthInMM * (BrickXyzElementNumbers.x+1))
            , (SingleBrickOuterWidthInMM * (BrickXyzElementNumbers.y+1))
            , SingleLayerBrickBodyHightInMM * BrickXyzElementNumbers.z]
          , center = false);
}

module 3dLowerBrickSolidBodyShape(BrickXyzElementNumbers)
{
  translate([0, 0,-2*ExtraCutLengthInMM])
    cube(  [  (SingleBrickOuterWidthInMM * BrickXyzElementNumbers.x) - 2*OuterBrickWallReductionInMM
            , (SingleBrickOuterWidthInMM * BrickXyzElementNumbers.y) - 2*OuterBrickWallReductionInMM
            , SingleLayerBrickBodyHightInMM * BrickXyzElementNumbers.z+2*ExtraCutLengthInMM]
          , center = false);
}

module 3dLowerBrickHollowCutter(BrickXyzElementNumbers)
{
  translate([  BrickWallWidthInMM-OuterBrickWallReductionInMM
             , BrickWallWidthInMM-OuterBrickWallReductionInMM, 0])
  {

    for (XElement = [1:BrickXyzElementNumbers.x]) {
      for (YElement = [1:BrickXyzElementNumbers.y]) {
        translate([  (XElement-1)*SingleBrickOuterWidthInMM
                   , (YElement-1)*SingleBrickOuterWidthInMM,0])
        3dSingleLowerBodyHollowCutter(BrickXyzElementNumbers.z, center = false);
      }
    }
  }
}

module 3dBrickHeadShape(HeadDiameterInMM=BrickHeadDiameterInMM)
{
  render();
  rotate_extrude(angle=360)
    2dSingleSideBrickHead(HeadDiameterInMM);

  module 2dSingleSideBrickHead(HeadDiameterInMM)
  {
    mirror([1,0])  // x > 0 is to be preffered to enable x==0 renderable objects.
    translate([  -HeadDiameterInMM/2+BrickHeadRoundingRadiusInMM
               , BrickHeadHightInMM-BrickHeadRoundingRadiusInMM])
    union() {
      difference() {
        circle(d=BrickHeadRoundingDiameterInMM);
        2dBrickHeadEdgeCutter();
        rotate([0,0,90])
          2dBrickHeadEdgeCutter();
      }
      polygon([  [-BrickHeadRoundingRadiusInMM, 0]
               , [0,BrickHeadRoundingRadiusInMM]
               , [  HeadDiameterInMM/2-BrickHeadRoundingRadiusInMM
                  , BrickHeadRoundingRadiusInMM]
               , [  HeadDiameterInMM/2-BrickHeadRoundingRadiusInMM
                  , -BrickHeadHightInMM
                    -BrickWallWidthInMM/2+BrickHeadRoundingRadiusInMM]
               , [  -BrickHeadRoundingRadiusInMM
                  , -BrickHeadHightInMM-BrickWallWidthInMM/2+BrickHeadRoundingRadiusInMM]
              ]);
    }

    module 2dBrickHeadEdgeCutter() {
      translate([0,-BrickHeadRoundingRadiusInMM])
        square([  BrickHeadRoundingDiameterInMM+ExtraCutLengthInMM
                , BrickHeadRoundingDiameterInMM], center=true);
    }
  }
}

module 3dHeadHolderStructure(HeadHolderDistanceInMM, ExtraLengthInMM = 0)
{
  for (angle = [0:90:360])
  {
    rotate([0,0,angle])
      3dSingleHeadHolderStick(HeadHolderDistanceInMM, ExtraLengthInMM);
  }

}

module 3dSingleHeadHolderStick(HeadHolderDistanceInMM, ExtraLengthInMM = 0)
{
  translate([  -HeadHolderDistanceInMM/2*cos(45)
             , HeadHolderDistanceInMM/2*sin(45)//SingleBrickInnerWidthInMM/2-HeadHolderXyzDimenstionsInMM.x/2*cos(45)
             , 0])
  rotate([0,0,45])
  translate([-HeadHolderXyzDimenstionsInMM.x*1/6,0,0])
  linear_extrude(HeadHolderXyzDimenstionsInMM.z+ExtraLengthInMM)
    polygon([  [0,0]
             , [0,HeadHolderXyzDimenstionsInMM.y]
             , [  HeadHolderXyzDimenstionsInMM.x - HeadHolderXyzDimenstionsInMM.y*(1+5/6)
                , HeadHolderXyzDimenstionsInMM.y + HeadHolderXyzDimenstionsInMM.y*5/6]
             , [HeadHolderXyzDimenstionsInMM.x, 0]
            ]);
}

module 3dSingleLowerBodyHollowCutter(Layers, center = true)
{
  translate([0,0,-BrickWallWidthInMM])
    cube(  [  SingleBrickInnerWidthInMM
            , SingleBrickInnerWidthInMM
            , SingleLayerBrickBodyHightInMM*Layers]
            , center = center);
}

```


[User]
I'd like to design a bracelet using OpenSCAD. It should be made up of identical links connected by pins, and have a clip at one end to fasten it.

Here are the basic parameters I want to control:

*   **Link Count:** The number of links in the bracelet, excluding the clip.
*   **Width:** The overall width of each link.
*   **Outer Width:** The width of the outer edges of each link; the rest should be recessed.
*  **Letter Height:** The height of any text on the bracelet.
*   **Message:** Text to be added to the bracelet links.
*   **Custom Font:** The font used for the text (e.g., Arial, Impact).
*   **Height:** The thickness of each link.
*   **Length:** The length of each link.
*   **Pin:** The diameter of the pins used to connect the links.
*   **Turned Clip:**  A boolean for whether the clip should be turned 90 degrees for better security (yes/no).
*  **Distance:**  A gap between parts for printing (prevents them from fusing).
* **Overlap:** An overlap amount to ensure pins fit smoothly.

Each link should have a recessed section in the middle, with the outer edges being slightly raised. The pins should be cylindrical and fit into holes in the adjacent links. The clip should have a locking mechanism with a similar pin design. The message should be added as text to the top of the links, centered, and spaced evenly across the length of the bracelet. The message should be printed with a linear_extrude and a configurable height, placed over the links.

Could you generate the OpenSCAD code for this? I don't need to use any external libraries.

[Assistant]
bracelet.scad:
```
/* [Hidden] */
$fn=30;
overlap=0.01;

/* [Basic setting] */
link_count=22; // [0:1:100]
width=9; // [5:0.1:60]
outer_width=2; // [3:0.1:20]
letter_height=0.4; // [0:0.2:2]
message="Hello World";
custom_font="Impact"; // [Arial, z003, Times New Roman, Impact]

/* [Link dimensions] */
height=3; // [3:0.2:4]
length=7; // [3:0.2:50]
pin=2; // [1:0.2:20]

/* [Clip orientation] */
turned_clip=1; // [0:No, 1:Yes]

/* [Printing limits] */
distance=0.3; // [0.0:0.05:2]

module pin(left=true){
    q=left?-1:1;
    rotate([0,q*90,0])
    cylinder(r1=0,r2=3*height/8,h=pin,center=true);
}

module part(r,w,l){
    hull(){
        rotate([0,90,0])
        cylinder(r1=r,r2=r,h=l,center=true);
        translate([0,w,0])
        rotate([0,90,0])
        cylinder(r1=r,r2=r,h=l,center=true);
    }
}

module connector(){
    union(){
        translate([+width/2-outer_width/2+distance/2,0,0])
        part(height/2,-length+height,outer_width-distance);
        translate([-width/2+outer_width/2-distance/2,0,0])
        part(height/2,-length+height,outer_width-distance);
    }
    translate([0,-length+height,0])
    part(height/2,0,width);

    //pin
    translate([width/2+pin/2-pin-outer_width+2*distance+overlap,0,0])
    pin(false);
    translate([-width/2-pin/2+pin+outer_width-2*distance-overlap,0,0])
    pin(true);
}

module link(){
    difference(){
        union(){
            translate([width/2-outer_width/2+distance/2,0,0])
            part(height/2,-length+height,outer_width-distance);
            translate([-width/2+outer_width/2-distance/2,0,0])
            part(height/2,-length+height,outer_width-distance);
            part(height/2,0,width);
            part(height/2,length-height,width-2*outer_width);
        }

        //pin hole
        translate([width/2+pin/2-pin-outer_width+overlap,length-height,0])
        pin(false);
        translate([-width/2-pin/2+pin+outer_width-overlap,length-height,0])
        pin(true);
    }
    //pin
    translate([width/2+pin/2-pin-outer_width+2*distance+overlap,-length+height,0])
    pin(false);
    translate([-width/2-pin/2+pin+outer_width-2*distance-overlap,-length+height,0])
    pin(true);
}

module clip(turned=false){
    turned=turned?-1:1;
    difference(){
        part(height/2,length,width-2*outer_width);

        //helper
        translate([0,-height/2,0])
        rotate([45,0,0])
        cube([width/4,height/2,height/2],center=true);

        //pin hole
        translate([width/2+pin/2-pin-outer_width+overlap,length,0])
        pin(false);
        translate([-width/2-pin/2+pin+outer_width-overlap,length,0])
        pin(true);

        //lock back
        hull(){
            translate([width/2+pin/2-pin-outer_width+overlap,0,0])
            pin(false);
            translate([width/2+pin/2-pin-outer_width+overlap,length/2,0])
            pin(false);
        }
        hull(){
            translate([-width/2-pin/2+pin+outer_width-overlap,0,0])
            pin(true);
            translate([-width/2-pin/2+pin+outer_width-overlap,length/2,0])
            pin(true);
        }
        //lock down
        hull(){
            translate([width/2+pin/2-pin-outer_width+overlap,length/2,0])
            pin(false);
            translate([width/2+pin/2-pin-outer_width+overlap,length/2,pin*turned])
            pin(false);
        }
        hull(){
            translate([-width/2-pin/2+pin+outer_width-overlap,length/2,0])
            pin(true);
            translate([-width/2-pin/2+pin+outer_width-overlap,length/2,pin*turned])
            pin(true);
        }
    }
}

/*
connector();
link();
clip();
*/

module band(links=7,turned_clip=false){
    connector();
    links=links+1;
    for(i=[1:1:links-1]){
        translate([0,-(2*length-height*2)*i])
        link();
    }
    for(i=[0:1:len(message)-1]){
        translate([0,length/3-(2*length-height*2)*(i+floor(links/2)-(floor(len(message)/2))),height/2])
        rotate([0,0,270])
        linear_extrude(letter_height)
        text(message[i], font=custom_font, size=min(width,length)/1.7, valign="center", halign="center");
    }
    translate([0,-(2*length-height*2)*(links?links:1)-height,0])
    clip(turned_clip);
}

band(link_count,turned_clip);
```


[User]
I'm looking for a parametric OpenSCAD design for a wheel nut indicator, similar to the one I saw on Thingiverse, but I need it to be a bit more flexible and robust.

The basic idea is a small, cap-like object that fits over a hex nut with a tight, press-fit. The indicator also needs a pointer that extends outwards. I'd like to be able to control the overall dimensions, fit, and pointer size using parameters. I'll need to use this on different sized vehicles so it will be important to control the internal and external diameters of the cap separately.

Here's what I'm thinking for parameters:

*   `nut_size`: This would be the diameter across the flats of the hex nut the indicator will fit onto.
*   `cap_outer_diameter`: The outer diameter of the main cylindrical body.
*   `cap_height`: The total height of the cylindrical cap.
*   `cap_inner_height`: The height of the internal portion of the cap, where it sits on the nut.
*   `fit_tolerance`: A small amount to reduce the size of the internal hex shape to create a press fit.
*   `pointer_length`: The length of the indicator pointer.
*   `pointer_width`: The width of the indicator pointer.
*   `pointer_height`: The height of the indicator pointer.
*   `num_points`: Number of indicator points around the wheel.

Also, I'd like a slight taper on the inner hex portion of the cap, so that it's easier to press onto the nut.  A parameter `inner_taper_angle` would be used to control the taper (in degrees). I'm imagining the base of the hex fitting being the same as the `nut_size` minus the `fit_tolerance`, and the top of the hex having a diameter `nut_size` minus a small portion of the tolerance.

Could you create an OpenSCAD file that handles these parameters? I'd prefer to use as few library dependencies as possible.

[Assistant]
Wheel_Nut_Indicator.scad:
```
// Wheel Nut Indicator V0.2
// Designed by https://www.thingiverse.com/bikecyclist
// As requested by https://www.thingiverse.com/drivingontheroadto
/*
* Fits on hex nuts.
* Has a slight taper to enable you to get a press fit.
* Use customizer (or OpenSCAD) to make a version that fits your truck
* Experimental design not actually tried in real life
* All the responsibility for your truck not losing any wheels when losing this device rests solely on your shoulders.
*/

$fn = 64;

wouter = 30;
winner = 25;
wtaper = 1;

npoints = 36;

hinner = 10;
houter = 10;

hpointer = 5;
lpointer = 30;
rpointer = 3;

eps = 0.01;

rotate ([0, 0, 180+60])
difference ()
{
    union ()
    {
        cylinder (h = houter, d = wouter / cos (30));

        hull ()
        {
            cylinder (h = hpointer, d = wouter / cos (30));

            translate ([lpointer - rpointer, 0, 0])
            cylinder (h = hpointer, r = rpointer);
        }
    }

    for (i = [1:npoints/6])
        rotate ([0, 0, i * 360/npoints])
        translate ([0, 0, houter - hinner - eps])
        hull ()
        {
            cylinder (h = eps, d = winner / cos (30), $fn = 6);

            translate ([0, 0, hinner + eps])
            cylinder (h = eps, d = (winner + wtaper) / cos (30), $fn = 6);
        }
}
```