[User]
Okay, I'm looking to design a parametric umbrella holder that can be mounted on a balcony railing, similar to the one described in the provided SCAD file but with more flexibility.

Here's what I need:

**Core Functionality & Requirements:**

1.  **Rail Mounting:** The holder needs to clamp onto a railing that has horizontal rectangular bars. The user should be able to specify the dimensions of these bars, including:
    *   `rail_bar_height`: Height of the rectangular bar.
    *   `rail_bar_width`: Width of the rectangular bar.
    *   `rail_bar_spacing`: Vertical distance between the two bars the holder will clamp to.
    *    (Optional) `rail_bar_thickness`: Thickness of the rectangular bars.

2.  **Umbrella Tube Holder:** The core function is to hold a cylindrical umbrella shaft. The user needs to be able to specify the following:
    *   `umbrella_tube_diameter`: Diameter of the umbrella's tube.
    *   `tube_wall_thickness`: Thickness of the tube holder itself.

3.  **Clamping Mechanism:** The holder will use two clamping pieces that go around the rectangular bars. These clamps will be adjustable, using a hex bolt and nut to tighten them down.
    *   The user should be able to specify the `clamp_band_width`.
    *   The user should be able to specify the `clamp_bracket_thickness`.
    *   The user should be able to specify the `adjustment_gap` between the two clamping pieces.
    *   The user should be able to specify the `bolt_diameter` and `nut_size` for the clamping bolt.

4.  **Rubber Insets:** It's essential that the holder has space for rubber insets to prevent slippage, specifically a channel for the rubber to sit inside of.
    *   The user should be able to specify a `rubber_inset_depth`.
    *   The user should be able to specify a `rubber_inset_width`.
    *   The user should be able to specify the `rubber_inset_height`.
5. **Hook for downward support**: The holder needs a hook on the backside that will wrap around the bottom of the rail to provide support against rotation and sliding downwards.
    *  The user should be able to specify the `hook_thickness`.
    *   The user should be able to specify the `hook_depth`.
    *   The user should be able to specify the `hook_width`.

6.  **Parametric Design:** I need *all* of the above dimensions to be user-definable parameters. The design should be robust enough that changing any of these dimensions won't break the model.

7.  **Material Saving:** The provided SCAD file has some material-saving cuts. It would be great to see some additional optimization cuts, or at least options for them.

8.  **OpenSCAD Libraries:** I'd like this model to leverage the BOSL2 library where it makes sense to simplify the design or make it more robust, but that isn't a strict requirement.

**Output:**

*   I need a single OpenSCAD file containing the parametric design.

**Example Usage:**

The design needs to be generic and easy to use so I can tweak everything as I need it.  For example, I might have:

```openscad
umbrella_tube_diameter = 35;
tube_wall_thickness = 2.5;
rail_bar_height = 40;
rail_bar_width = 25;
rail_bar_spacing = 75;
clamp_band_width = 18;
clamp_bracket_thickness = 4;
adjustment_gap = 3;
bolt_diameter = 5;
nut_size = 8;
rubber_inset_depth = 1.5;
rubber_inset_width = 2;
rubber_inset_height = 4;
hook_thickness = 3.5;
hook_depth= 7.5;
hook_width= 10;
```

I'd like to be able to change those variables and have the holder adapt to fit the new dimensions.

[Assistant]
UmbrellaHolder2.scad:
```

// 2013 Lukas Süss aka mechadense
// License CC-BY-NC
// Umbrella holder

// Diameter of the umbrellas tube (+0.5mm)
dtube = 38.5;
//38;
rtube = dtube/2;

// Width of the bands used to fixate the holder onto one of the rectangular bars
wband = 20;

// hight of the rectangulat bar on which to mount the holder
sbar0 = 50;

// thickness of hook
shook = 4;

// depth of hook
dhook = 8;

sbar = sbar0+shook;
//50.5

//----

// baseplate thickness
tplate = 3.0;

// tubeholder thickness
ttubewall = 3.0; // wall thickness of the pipe segment

// width of gap to adjust for tube diameter variations
adjustgap = 4;

// thickness of adjustment brackets
tadjust = 5;
// size of brackets
sadjust = 16;

// width of outer band guides
wrim = 3;

// hight of outer band guides
hrim = 3;

// resolution: minimum facet length
$fs=0.4;
// resolution: maximal facet angle
$fa=5;

// baseplate groovedepth for soft material
tinset = 2;

// total length of part
lges = dtube+2*ttubewall+2*wband+2*wrim;

// screw diameter
dscrew = 6;

// screw clearance
scrclr = 0.2;

// nut or screwhead wrench size
s = 10.1;

difference()
{
  union()
  {
    //Baseplate
    translate([tplate/2-tinset/2,0,0*sbar/2])
    cube([tplate+tinset,lges,sbar],center=true);

    //Tubeholder Basebody
    translate([(rtube+ttubewall),0,0])
      cylinder(r1=rtube+ttubewall,r2=rtube+ttubewall-0,h=sbar,center=true);

    // inner band guides and structural integrity
    translate([(rtube+ttubewall)/2,0,0])
    {
      translate([0,-tplate/2+(rtube+ttubewall),0])
        cube([(rtube+ttubewall),tplate,sbar],center=true);
      translate([0,-(-tplate/2+(rtube+ttubewall)),0])
        cube([(rtube+ttubewall),tplate,sbar],center=true);
    }
    // outer band guides
    translate([(tplate+hrim)/2,0,0])
    {
      translate([0,+(lges/2-wrim/2),0])
        cube([tplate+hrim,wrim,sbar],center=true);
      translate([0,-(lges/2-wrim/2),0])
        cube([tplate+hrim,wrim,sbar],center=true);
    }

    // base body for clamping bracket
    hull()
    {
      translate([(dtube+2*ttubewall)/2,0,0])
        cube([dtube+2*ttubewall,tadjust*2+adjustgap,3*sadjust],center=true);
      translate([(dtube+2*ttubewall+sadjust)/2,0,0])
        cube([dtube+2*ttubewall+sadjust,tadjust*2+adjustgap,sadjust],center=true);
    }
    hull()
    {
      translate([-dhook/2-tinset,0,-sbar/2+shook/2])
      cube([dhook,lges-2*dhook,shook],center=true);

      translate([-1/2-tinset,0,-sbar/2+shook/2])
      cube([1,lges,shook],center=true);
    }
  }

  //Tube holder cut
  translate([(rtube+ttubewall),0,0])
    cylinder(r=rtube,h=sbar*1.2,center=true);

  // adjustment gap cutter
  translate([dtube*1.5,0,0])
    cube([dtube,adjustgap,sbar*1.2],center=true);

  // inset cutter
  translate([0,0,shook/2])
  hull()
  {
    translate([-(tinset+1)/2,0,0])
    cube([tinset+1,lges-2*wrim,sbar0-2*wrim-2*tinset],center=true);

    translate([-1/2-tinset,0,0])
    cube([1,lges-2*wrim,sbar0-2*wrim],center=true);
  }

  // clamp screwhole
  // asserted: clampthickness < smaller tubeholder
  translate([dtube+2*ttubewall+sadjust/2,0,0]) rotate(90,[1,0,0])
    cylinder(r=dscrew/2+scrclr/2,h=dtube,center=true);
  // add hex inset for nut!
  translate([dtube+2*ttubewall+sadjust/2,adjustgap/2+tadjust-2,0]) // <<<<<
    rotate(30,[0,1,0]) rotate(-90,[1,0,0])
    cylinder(r=s/2/cos(30)+scrclr/2,h=dtube,$fn=6,center=false);

  //several material saving cuts
  /*
  translate([0,+rtube*0.61803,0]) cuts1();
  translate([0,-rtube*0.61803,0]) cuts1();
  */
  translate([+rtube,0,+sbar/2]) rotate(90,[0,1,0])
    cylinder(r=10,h=dtube*1.5,$fn=4);
  //translate([+rtube,0,-sbar/2]) rotate(90,[0,1,0])
  //  cylinder(r=10,h=dtube*1.5,$fn=4);

  //translate([0,lges/2+1,0]) cuts2(20);
  //translate([0,-(lges/2+1),0]) cuts2(20);
}

module cuts1()
{
  translate([0,0,-0.05])
    cylinder(r1=sbar/8*1.6,r2=0,h=sbar/4*1.4,$fn=4);
    translate([0,0,+0.05]) scale([1,1,-1])
    cylinder(r1=sbar/8*1.6,r2=0,h=sbar/4*1.4,$fn=4);

}

module cuts2(s)
{
  hull()
  {
    cube([20,2,sbar*0.75],center=true);
    cube([20,2+s,sbar*0.75-1.5*s],center=true);
  }
}

```


[User]
Okay, I need a custom thumbnut designed in OpenSCAD, but I want it to be more flexible and easier to customize than what I've seen. I've got an existing .scad file I've been using as a starting point, but it's a bit clunky (I'll include it below, for reference).

The core idea is a cylindrical thumbnut with a knurled edge and a central hole for a bolt. I want to be able to easily tweak the following parameters:

*   **Overall Diameter:** I need to be able to set the total diameter of the thumbnut body.
*   **Overall Height:** I need to control the total height of the thumbnut.
*   **Knurling Thickness:** This defines the height of the knurled section on the nut.
*   **Knurl Count:**  I want to specify the number of individual knurls around the perimeter.
*   **Hole Diameter:** This is the diameter of the hole through the center of the thumbnut. It should also be able to handle the hole diameter being reduced slightly for threads.
*   **Recess Placement:** There is a small, hull-created recess on one side as an indicator on the existing design. I would like to be able to control the radial distance (from the center) of the two cylinders that make up this recess as separate parameters.

Here are the things I specifically want to improve over my existing design:

1.  **Clearer Parameter Naming**:  I'd appreciate meaningful names for all of the parameters. For example, instead of "Thumbnut_Diameter," maybe something like "nut_overall_diameter."
2.  **More Flexible Knurl Design:** The way the knurls are created in my existing design feels kind of brittle. Instead of overlapping cylinders, is there a way to generate the knurls using a simple linear extrusion of a triangle or trapezoid?  This might also help with printability.
3.  **Optional Recess**: I'd like to make the indicator recess an optional feature controlled by a boolean. If I don't want it, I should be able to turn it off.
4.  **Threaded Hole:** I'd like to optionally thread the center hole, specifying a thread diameter (ideally, this would take into account both metric and imperial threads). The hole should be created using a standard thread library. Ideally, we should be able to optionally create just the pilot hole as well as the threads.
5.  **Use a Standard Library**: In particular, I would like to use the [BOLTS library](https://github.com/openscad/BOLTS), if that makes sense for thread generation.
6.  **More Control Over the Recess:** My current implementation uses a `hull()` operation, and the sizing isn't great. Instead, could the recess cylinders be controlled by separate radius parameters and a center parameter for the recess's radial distance from the center, while also using a boolean to toggle the feature on or off?

I think that covers everything. It should be a customizable thumbnut with good control over all its features, and uses industry-standard thread libraries.

Here is my original code, for reference:

```
//Thumbscrew by John Davis 7-14-13
//Polyhole module by nophead

/*[Dimensions of thumbscrew]*/
//Thumbnut diameter
Thumbnut_Diameter = 16;
//Thumbnut height
Thumbnut_Height = 7;
//Thickness of knurled portion
Knurling_Thickness = 3.5;
//Number of knurls
Knurls = 15;
//Hole diameter (before threading)
Hole_Diameter = 3.5;

/*[Printer Settings]*/
//To control the number facets rendered, fine ~ 0.1 coarse ~1.0. 0.3 is fine for home printers.
$fs = 0.3;

/*[Hidden]*/
//leave $fn disabled, do not change
$fn = 0;
//leave $fa as is, do not change
$fa = 0.01;
//padding to insure manifold, ignore
Padding = 0.01;

difference() {
	union () {
		translate([0,0,Knurling_Thickness-Padding])
		cylinder (h = Thumbnut_Height-Knurling_Thickness, r = (Thumbnut_Diameter-Knurling_Thickness)/2);
		difference() {
			union() {
				cylinder(h =Knurling_Thickness, r = Thumbnut_Diameter/2-Knurling_Thickness/2);
				rotate_extrude ()
				translate([Thumbnut_Diameter/2-Knurling_Thickness/2,Knurling_Thickness/2,0])
				circle(r=Knurling_Thickness/2+Padding);
			}
			for (i = [0:Knurls-1]) {
				rotate([0,0,(360/Knurls)/2+i*(360/Knurls)])
				translate([Thumbnut_Diameter/2,0,-Padding])
				cylinder(r=Knurling_Thickness/3, h=Knurling_Thickness+2*Padding);
			}
		}
	}

	//Hole for threaded shaft
	rotate([0,0,30])
	translate([0,0,-Padding])
	polyhole(Thumbnut_Height+2*Padding, Hole_Diameter*0.85);//Hole is shrunk to allow extra material for tapping

	//Recess as indicator
	hull(){
		translate([Hole_Diameter/2+Knurling_Thickness/3,0,0])
		cylinder(r=Knurling_Thickness/4, h=Knurling_Thickness/2, center=true);
		translate([Thumbnut_Diameter/2-3*Knurling_Thickness/4,0,0])
		cylinder(r=Knurling_Thickness/4, h=Knurling_Thickness/2, center=true);
	}
}

module polyhole(h, d) {
    n = max(round(2 * d),3);
    rotate([0,0,180])
        cylinder(h = h, r = (d / 2) / cos (180 / n), $fn = n);
}
```

[Assistant]
Thumbnut_071413.scad:
```
//Thumbscrew by John Davis 7-14-13
//Polyhole module by nophead

/*[Dimensions of thumbscrew]*/
//Thumbnut diameter
Thumbnut_Diameter = 16;
//Thumbnut height
Thumbnut_Height = 7;
//Thickness of knurled portion
Knurling_Thickness = 3.5;
//Number of knurls
Knurls = 15;
//Hole diameter (before threading)
Hole_Diameter = 3.5;

/*[Printer Settings]*/
//To control the number facets rendered, fine ~ 0.1 coarse ~1.0. 0.3 is fine for home printers.
$fs = 0.3;

/*[Hidden]*/
//leave $fn disabled, do not change
$fn = 0;
//leave $fa as is, do not change
$fa = 0.01;
//padding to insure manifold, ignore
Padding = 0.01;

difference() {
	union () {
		translate([0,0,Knurling_Thickness-Padding])
		cylinder (h = Thumbnut_Height-Knurling_Thickness, r = (Thumbnut_Diameter-Knurling_Thickness)/2);
		difference() {
			union() {
				cylinder(h =Knurling_Thickness, r = Thumbnut_Diameter/2-Knurling_Thickness/2);
				rotate_extrude ()
				translate([Thumbnut_Diameter/2-Knurling_Thickness/2,Knurling_Thickness/2,0])
				circle(r=Knurling_Thickness/2+Padding);
			}
			for (i = [0:Knurls-1]) {
				rotate([0,0,(360/Knurls)/2+i*(360/Knurls)])
				translate([Thumbnut_Diameter/2,0,-Padding])
				cylinder(r=Knurling_Thickness/3, h=Knurling_Thickness+2*Padding);
			}
		}
	}

	//Hole for threaded shaft
	rotate([0,0,30])
	translate([0,0,-Padding])
	polyhole(Thumbnut_Height+2*Padding, Hole_Diameter*0.85);//Hole is shrunk to allow extra material for tapping

	//Recess as indicator
	hull(){
		translate([Hole_Diameter/2+Knurling_Thickness/3,0,0])
		cylinder(r=Knurling_Thickness/4, h=Knurling_Thickness/2, center=true);
		translate([Thumbnut_Diameter/2-3*Knurling_Thickness/4,0,0])
		cylinder(r=Knurling_Thickness/4, h=Knurling_Thickness/2, center=true);
	}
}

module polyhole(h, d) {
    n = max(round(2 * d),3);
    rotate([0,0,180])
        cylinder(h = h, r = (d / 2) / cos (180 / n), $fn = n);
}

```


[User]
Okay, I'm looking to create a customizable die with some specific features, and I'd like to use OpenSCAD to do it. I need a parametric design that allows me to control a bunch of aspects.

First, the die needs to be a cube, and I need to control the `die_width` (edge length) with a slider, and it should range from 5mm to 20mm. The overall color of the die body should be customizable via a dropdown, allowing me to pick between "red", "green", "blue", "yellow", and "white".

Then, I need the symbols or markings on each face to also have a customizable color, again with a dropdown offering "red", "green", "blue", "yellow", and "white". I want to adjust the resolution of the curves (spheres, mainly) using a slider controlling a variable called `resolution`, with a range from 22 to 36. The `$fn` variable should be set equal to this resolution.

The symbols should be inset into the die faces, but I also want the option of having "floating" faces. When floating is enabled via a boolean checkbox (`floating`), the faces should be like a small inset cube, creating a space between the face and the main die body. I should also have a slider for `floating_space`, controlling the distance of this inset, with a range from 0.5 to 3 mm. And the edges of the main die should be rounded (smoothed) using a sphere intersection if a `rounded` boolean checkbox is ticked.

I need to control the markings of each side of the dice independently via dropdown, so the symbol for each face can be either be "Dots" or a string. If I select Dots I should not be able to specify a character, otherwise the following features are used. If I select Characters I should be able to specify any string for the symbol, its size as a number slider, and its rotation (angle) as a slider as well. This will repeat for every face. I would like to use the "write" library, specifically `writecube`, for generating the text, so you will need to include the `Write.scad` library. It allows you to specify the font via a dropdown as well, and the options should be "Letters.dxf", "orbitron.dxf", and "BlackRose.dxf", which are provided by the library.

Finally, I need a dual extrusion option via a boolean checkbox named `dual_extrusion`, which, when enabled (set to 1), outputs only the symbols of the die. This will help to print the die with multi material printers. When disabled (set to 0) the whole die is output with all the markings.

So to be clear, here are the controls I need:

*   `die_width` (slider, 5-20)
*   `Die_Color` (dropdown: "red", "green", "blue", "yellow", "white")
*   `Symbol_Color` (dropdown: "red", "green", "blue", "yellow", "white")
*   `resolution` (slider, 22-36)
*   `rounded` (checkbox, true/false)
*   `floating` (checkbox, true/false)
*   `floating_space` (slider, 0.5-3)
*   `dual_extrusion` (checkbox, 0/1)
*   For each side (1-6):
    *   `side_n_mode` (dropdown: "Dots", "Characters"), where *n* is the side number.
    *   `side_n_characters` (text input field), only used if side_n_mode = "Characters".
    *   `side_n_size` (number slider), only used if side_n_mode = "Characters"
    *   `side_n_rotation` (number slider), only used if side_n_mode = "Characters"
    *   `side_n_font` (dropdown: "Letters.dxf", "orbitron.dxf", "BlackRose.dxf"), only used if side_n_mode = "Characters"
I think that's everything. Can you create an OpenSCAD file for this?

[Assistant]
Dice_v1.scad:
```
use <write/Write.scad>;

// How Wide Is the Die?
die_width = 20;  //[5:20]

//What Color Would You Like The Die
Die_Color = "red"; //[red,green,blue,yellow,white]

//What Color Would You Like The Symbols
Symbol_Color = "white"; //[red,green,blue,yellow,white]

//Adjust the resolution
resolution = 36;//[22:36]
$fn=resolution;

//Max distance from center of side
m_dist = die_width/5.2;

// Do you want the corners rounded off?
rounded = 1; //[1:True,0:False]

// Do you want the floating face ?
floating  = 1; //[1:True,0:False]
floating_space = 1.25;  //[0.5:3]

//Set to output just the symbols for dual extrusion
dual_extrusion = 0;//[0:off,1:Symbols]

//Choose Type: If Dots is Selected Your Character Entry is ignored
side_1_mode = 0; //[0:Dots,1:Characters]
side_1_characters = "!";
side_1_size = 4;
side_1_rotation = 45;
side_1_font = "Letters.dxf";
//["Letters.dxf":Basic,"orbitron.dxf":Orbitron,"BlackRose.dxf":BlackRose]

//Choose Type: If Dots is Selected Your Character Entry is ignored
side_2_mode = 0; //[0:Dots,1:Characters]
side_2_characters = "Two" ;
side_2_size = 3;
side_2_rotation = 0;
side_2_font = "Letters.dxf";
//["Letters.dxf":Basic,"orbitron.dxf":Orbitron,"BlackRose.dxf":BlackRose]

//Choose Type: If Dots is Selected Your Character Entry is ignored
side_3_mode = 0; //[0:Dots,1:Characters]
side_3_characters = "Three";
side_3_size = 3;
side_3_rotation = 0;
side_3_font = "Letters.dxf";
//["Letters.dxf":Basic,"orbitron.dxf":Orbitron,"BlackRose.dxf":BlackRose]

//Choose Type: If Dots is Selected Your Character Entry is ignored
side_4_mode = 0; //[0:Dots,1:Characters]
side_4_characters = "Four";
side_4_size = 3;
side_4_rotation = 0;
side_4_font = "Letters.dxf";
//["Letters.dxf":Basic,"orbitron.dxf":Orbitron,"BlackRose.dxf":BlackRose]

//Choose Type: If Dots is Selected Your Character Entry is ignored
side_5_mode = 0; //[0:Dots,1:Characters]
side_5_characters = "Five";
side_5_size = 3;
side_5_rotation = 0;
side_5_font = "Letters.dxf";
//["Letters.dxf":Basic,"orbitron.dxf":Orbitron,"BlackRose.dxf":BlackRose]

//Choose Type: If Dots is Selected Your Character Entry is ignored
side_6_mode = 0; //[0:Dots,1:Characters]
side_6_characters = "Six";
side_6_size = 3;
side_6_rotation = 0;
side_6_font = "Letters.dxf";
//["Letters.dxf":Basic,"orbitron.dxf":Orbitron,"BlackRose.dxf":BlackRose]

main(); //runs program

module main(){
	if(dual_extrusion  == 0){
		difference(){
			die_cube();
			color(Symbol_Color)sides();
		}
	}
	else if(dual_extrusion == 1){
		intersection(){
			color(Symbol_Color)die_cube();
			color(Symbol_Color)sides();
		}
	}
	else{

		}
}

module die_cube(){

	color(Die_Color)
	union(){
		if(rounded){
			if(floating){
				difference(){
					intersection(){
						cube(size=die_width,center=true);
						sphere(r=die_width*.7,center=true);
					}
					die_cube_cut();
				}
				die_cube_bone();
			}else{
				intersection(){
					cube(size=die_width,center=true);
					sphere(r=die_width*.7,center=true);
				}
			}
		}else{
			if(floating){
				difference(){
					cube(size=die_width,center=true);
					die_cube_cut();
				}
				die_cube_bone();
			}else{
				cube(size=die_width,center=true);
			}
		}
	}
}

module die_cube_cut(){
	cylinder(r=die_width/2-floating_space,h=die_width+.1,center=true);
	rotate ([90,0,0])cylinder(r=die_width/2-floating_space,h=die_width+.1,center=true);
	rotate ([0,90,0])cylinder(r=die_width/2-floating_space,h=die_width+.1,center=true);
}

module die_cube_bone(){
cylinder(r=die_width/2-floating_space*2,h=die_width,center=true);
	rotate ([90,0,0])cylinder(r=die_width/2-floating_space*2,h=die_width,center=true);
	rotate ([0,90,0])cylinder(r=die_width/2-floating_space*2,h=die_width,center=true);
}

module sides(){
	side1();
	side2();
	side3();
	side4();
	side5();
	side6();
}
module side1(){
	textDepth= die_width/15;
	if(side_1_mode==1){
		//character mode

		writecube(side_1_characters,where=[0,0,0], size=die_width, t=textDepth,h = side_1_size,face = "front",rotate= side_1_rotation,font=side_1_font
);
	}
	else {
		//dot mode
		translate([0,-die_width/2,0])sphere(r=side_1_size/2,center=true);
	}

}
module side2(){
	textDepth= die_width/15;
	if(side_2_mode){
		//character mode
		writecube(side_2_characters, where= [0,0,0], size = die_width, t=textDepth,h = side_2_size,face = "top",rotate = side_2_rotation,font=side_2_font);
	}
	else {
		//dot mode
		rotate(side_2_rotation,[0,0,1]){

			translate([m_dist,m_dist,die_width/2])sphere(r=side_2_size/2,center=true);
			translate([-m_dist,-m_dist,die_width/2])sphere(r=side_2_size/2,center=true);
		}
	}

}
module side3(){
	textDepth= die_width/15;
	if(side_3_mode){
		//character mode
		writecube(side_3_characters, where= [0,0,0], size = die_width, t=textDepth,h = side_3_size,face = "right",rotate = side_3_rotation,font=side_3_font);
	}
	else {
		//dot mode
		rotate(side_3_rotation,[1,0,0]){

			translate([die_width/2,-m_dist,m_dist])sphere(r=side_3_size/2,center=true);
			translate([die_width/2,m_dist,-m_dist])sphere(r=side_3_size/2,center=true);
			translate([die_width/2,0,0])sphere(r=side_3_size/2,center=true);

		}
	}

}
module side4(){
	textDepth= die_width/15;
	if(side_4_mode){
		//character mode
		writecube(side_4_characters, where= [0,0,0], size = die_width, t=textDepth,h = side_4_size,face = "left",rotate = side_4_rotation,font=side_4_font);
	}
	else {
		//dot mode
		rotate(side_4_rotation,[1,0,0]){
			translate([-die_width/2,-m_dist,m_dist])sphere(r=side_4_size/2,center=true);
			translate([-die_width/2,m_dist,-m_dist])sphere(r=side_4_size/2,center=true);

			translate([-die_width/2,m_dist,m_dist])sphere(r=side_4_size/2,center=true);
			translate([-die_width/2,-m_dist,-m_dist])sphere(r=side_4_size/2,center=true);
		}
	}

}
module side5(){
	textDepth= die_width/15;
	if(side_5_mode){
		//character mode
		writecube(side_5_characters, where= [0,0,0], size = die_width, t=textDepth,h = side_5_size,face = "bottom",rotate = side_5_rotation,font=side_5_font);
	}
	else {
		//dot mode
		rotate(side_5_rotation,[0,0,1]){

			translate([-m_dist,m_dist,-die_width/2])sphere(r=side_5_size/2,center=true);
			translate([m_dist,-m_dist,-die_width/2])sphere(r=side_5_size/2,center=true);
			translate([0,0,-die_width/2])sphere(r=side_5_size/2,center=true);
			translate([m_dist,m_dist,-die_width/2])sphere(r=side_5_size/2,center=true);
			translate([-m_dist,-m_dist,-die_width/2])sphere(r=side_5_size/2,center=true);
		}
	}

}
module side6(){
	textDepth= die_width/15;
	if(side_6_mode){
		//character mode
		writecube(side_6_characters, where= [0,0,0], size = die_width, t=textDepth,h = side_6_size,face = "back",rotate = side_6_rotation,font=side_6_font);
	}
	else {
		//dot mode with rotate
		rotate(side_6_rotation,[0,1,0]){

			translate([-m_dist,die_width/2,m_dist])sphere(r=side_6_size/2,center=true);
			translate([m_dist,die_width/2,-m_dist])sphere(r=side_6_size/2,center=true);
			translate([m_dist,die_width/2,0])sphere(r=side_6_size/2,center=true);
			translate([-m_dist,die_width/2,0])sphere(r=side_6_size/2,center=true);
			translate([m_dist,die_width/2,m_dist])sphere(r=side_6_size/2,center=true);
			translate([-m_dist,die_width/2,-m_dist])sphere(r=side_6_size/2,center=true);
		}
	}

}
```


[User]
Okay, I need help designing a customizable backplate for my 3D printer. I've seen some cool ones online and I want to make my own that I can personalize with text and images.

I want to be able to select whether it's for a Makerbot Replicator 2/2X or a Replicator 1. The design should also allow me to choose between embossing or debossing the added text and images.

For text, I need to be able to add a line of text at the top and a line at the bottom of the plate. I want to be able to control the font, font size, vertical and horizontal position, and the rotation angle of each text label. The fonts available should include "Black Rose", "Braille", "Knewave", "Letters", and "Orbitron". I need to be able to position the text using sliders for the vertical and horizontal position. For the top text, the vertical slider should range from 5 to 65 and horizontal slider should range from 5 to 120. For the bottom text, the vertical slider should range from 5 to 65 and horizontal slider should range from 5 to 120.

For images, I'll be using the output from a program called "Stencil-o-Matic" that gives me a list of points defining the image outlines. I need to be able to paste that point data into the design. I need to control the image size, its rotation, and its horizontal and vertical positions. The image size should range from 1 to 50 and should scale uniformly, not squish or stretch. The horizontal slider should range from 10 to 110 and the vertical slider from 10 to 50. The rotation should range from 0 to 360 degrees.

The design should include the standard mounting holes and cutouts for the Replicator 2/2X and Replicator 1. The dimensions for Replicator 1 should be based on the measurements from [this Thingiverse model](http://www.thingiverse.com/thing:33827).

I'd also like to have a preview of the build plate, but this doesn't need to affect the final model. I can choose between a Replicator 2, Replicator 1, Thingomatic, or a manual setting where I can specify the build plate's x and y dimensions. The manual x and y sliders should range from 100 to 400.

The OpenSCAD file should include the `utils/build_plate.scad` and `write/Write.scad` libraries.  I think it would be good if I can control the thickness of the stencil, but the current design seems to set it to 1.5mm, so maybe this doesn't need to be exposed.

Can you create an OpenSCAD file that implements all of these features?

[Assistant]
Repplicator_Backplate_TNH.scad:
```
// Customizable Replicator 2 / 2X Backplate 1.1
// by TheNewHobbyist 2013 (http://thenewhobbyist.com)
// http://www.thingiverse.com/thing:118870
//
// I saw DivineShadow's awesome "Makerbot Replicator 2 Back Plate Superman
// Logo" and thought it would be a great model for customizing. Put your
// company logo behind your prints, your name, someone else's name, a picture
// of your cat, anything you can think of!
//
// I'm once again using Benjamin's awesome "Stencil-o-Matic" to generate the
// code needed for including images in this design.
//
// If you use the deboss setting in customizer you should be able to see through
// your print slightly just like on DivineShadow's design. If you use the emboss
// setting you can swap your filament at 5.5mm to create a two tone color effect
// and make your additions pretty stand out.
//
// When I'm feeling a bit braver I look forward to replacing the backplate on my
// bot too!
//
// Change Log:
//
// v1.0
// Initial Release
//
// v1.1
// ADDED Replicator 1 support for RossRobotics (Replicator 1 measurements based on
// this model: http://www.thingiverse.com/thing:33827)
// ADDED Auto-centering text
//
// v1.2
// UPDATED Replicator 1 top edges needed to be adjusted
// UPDATED Code housekeeping
//

/////////////////////////
//  Customizer Stuff  //
///////////////////////

/* [Add Text] */

// Which bot are you looking to mod?
Bot = "Rep2"; // ["Rep2":Replicator 2 / 2X,"Rep1":Replicator 1]

// How should your additions be displayed?
Style = "Emboss"; // ["Emboss":Emboss,"Deboss":Deboss]

// Add a line of text at the top of your plate (not used in TheNewHobbyist plate)
top_text_label = "";

top_text_font = "write/orbitron.dxf"; // ["write/BlackRose.dxf":Black Rose, "write/braille.dxf":Braille,"write/knewave.dxf":Knewave,"write/Letters.dxf":Letters,"write/orbitron.dxf":Orbitron]

top_text_size = 12; // [1:40]

Move_Top_Text_Up_Down = 57; // [5:65]

Move_Top_Text_Left_Right = 65; // [5:120]

top_text_rotation = 0; // [0:None,90:Left,180:Upside Down,270:Right]

// Add a line of text at the bottom of your plate
bottom_text_label = "TheNewHobbyist";

bottom_text_font = "write/orbitron.dxf"; // ["write/BlackRose.dxf":Black Rose, "write/braille.dxf":Braille,"write/knewave.dxf":Knewave,"write/Letters.dxf":Letters,"write/orbitron.dxf":Orbitron]

bottom_text_size = 12; // [1:40]

Move_Bottom_Text_Up_Down = 18; // [5:65]

Move_Bottom_Text_Left_Right = 65; // [5:120]

bottom_text_rotation = 0; // [0:None,90:Left,180:Upside Down,270:Right]

/* [Add Image] */

// Paste your Sencil-o-Matic code here or leave blank
input ="default_TNH";

image_size = 20; // [1:50]

Rotate_Image = 0; // [0:360]

Move_Image_Left_Right = 60; // [10:110]

Move_Image_Up_Down = 50; // [10:50]

// preview[view:south, tilt:top]

/////////////////////////
// Beat it Customizer //
///////////////////////

/* [Hidden] */

use <utils/build_plate.scad>
use <write/Write.scad>

//for display only, doesn't contribute to final object
build_plate_selector = 0; //[0:Replicator 2,1: Replicator,2:Thingomatic,3:Manual]

//when Build Plate Selector is set to "manual" this controls the build plate x dimension
build_plate_manual_x = 100; //[100:400]

//when Build Plate Selector is set to "manual" this controls the build plate y dimension
build_plate_manual_y = 100; //[100:400]

build_plate(build_plate_selector,build_plate_manual_x,build_plate_manual_y);

stencil_thickness = 1.5;
offX = 0;
offY = 0;
margin = 10;
dispo_width = image_size;

points_array = (input=="default_TNH"? [[133,286],[[234.27,6.02],[231.55,7.45],[227.5,10.88],[222.85,15.67],[218.69,20.35],[214.95,25.17],[211.32,30.24],[208.44,34.98],[206.52,39],[205.31,48.23],[204.14,65.5],[202.43,96.43],[199.95,138.5],[197.65,174.91],[196.37,192.25],[195.44,195.38],[192.95,196],[190.58,196.5],[189.09,197.84],[188.55,199.75],[188.65,201.77],[188.28,204.15],[185.74,207.18],[181.17,210.7],[175.06,214.5],[168.61,218.79],[163.29,223.5],[159.05,228.64],[155.24,233.98],[152.19,239.17],[149.77,243.98],[148.11,250.02],[146.97,258.66],[145.84,267.33],[144.06,272.66],[141.97,276.16],[139.87,279.16],[138.4,281.78],[138.36,284.3],[139.83,286.58],[143.12,288.43],[150.09,289.9],[162.38,291.02],[181.28,291.67],[205.5,291.95],[229.79,291.67],[248.86,291],[261.56,289.87],[267.86,288.28],[270.76,286.27],[271.82,283.7],[271.26,280.36],[268.97,275.96],[266.18,270.14],[264.49,261.76],[263.22,253.76],[262.03,247.53],[260.34,242.46],[257.87,237.27],[254.58,232.07],[250.91,227.01],[246.01,222],[239.74,216.91],[233.89,213.03],[230,210.88],[227.72,209.34],[225.75,206.9],[224.51,204.05],[224,201.5],[223.82,199.39],[223.39,197.58],[222.07,196.41],[219.45,196],[216.94,195.74],[215.57,195.11],[215.61,179.54],[216.5,143.36],[217.84,100.02],[218.98,67.24],[219.99,41.97],[223.5,34.86],[227.01,28.44],[230.51,22.99],[232.97,19.44],[234,17.58],[234.64,16.25],[236.17,13.98],[237.73,11.12],[237.19,8.52],[235.86,6.75],[234.27,6.02]],[[212.84,76.5],[212.5,59.5],[211.74,69.5],[210.48,90.08],[208.53,125.5],[206.63,159.58],[205.5,176.93],[204.81,181.12],[203.95,183.56],[203.18,185.98],[202.73,190.13],[202.5,195.5],[206.22,195.81],[209.36,195.65],[210.42,193.81],[211.09,177.78],[212.04,142.5],[212.75,102.9],[212.84,76.5]],[[206,209],[195.82,209.28],[191.5,210],[194.92,210.74],[206,211],[217.08,210.74],[220.5,210],[216.18,209.28],[206,209]],[[205.86,215.72],[183.79,215.5],[178.37,218.41],[172.58,222.55],[166.23,228.5],[160.29,235.76],[156.27,243.19],[153.68,250.66],[151.96,258.09],[150.89,264.79],[149.83,270.5],[148.37,275.16],[146.32,279.34],[144.69,282.17],[144.25,283.58],[147.3,284.15],[154.07,284.97],[173.01,285.68],[205.29,285.98],[237.8,285.68],[256.79,284.92],[263.77,284.03],[266.92,283.42],[266.23,281.75],[264,278.35],[260.66,273.7],[259.87,264.1],[259.05,256.44],[258.15,251.5],[256.85,248.06],[255.05,244],[252.96,239.81],[250.98,236.07],[248.08,232.07],[243.79,227.28],[238.5,222.61],[233.21,218.93],[227.93,215.94],[205.86,215.72]],[[156.85,278.42],[154.78,278.35],[153.53,278.95],[153.45,279.83],[154.19,280.46],[157.32,281.08],[163,281.96],[173.19,282.99],[187.17,283.97],[203.88,284.41],[220.67,283.98],[234.91,283.01],[245.5,281.96],[251.42,280.91],[254.43,279.94],[254.97,279.17],[254.93,278.6],[251.4,278.77],[243.5,279.76],[228.64,280.99],[205,281.42],[182.42,281.13],[168.5,280.22],[161.36,279.17],[156.85,278.42]]]: input);

input_width = points_array[0][0];
input_height= points_array[0][1];
sTrace = dispo_width/input_width;
stencil_height = input_height*sTrace + 2*margin;

/////////////////////////
//   Moduletown USA   //
///////////////////////

module rep1_backplate_solid(){
	union(){
		cube([124.3, 89.8, 5.5]);
		translate([7.2, -5.3, 0]) cube([9.4, 5.5, 5.5]);
		translate([107.7, -5.3, 0]) cube([9.4, 5.5, 5.5]);
	}
}

module rep1_backplate_negative(){
	translate([21.8,67.6,0]) cylinder(r=2.2, h=20, center=true);
	translate([102.8,67.6,0]) cylinder(r=2.2, h=20, center=true);
	translate([55.5,-3.7,-1]) cube([13.3, 8.1, 10]);
	translate([20.1,-3.1,-1]) cube([2.9, 13.3, 10]);
	translate([101.3,-3.1,-1]) cube([2.9, 13.3, 10]);
	translate([18.9,7.4,-1]) cube([5.3, 1.7, 10]);
	translate([100.1,7.4,-1]) cube([5.3, 1.7, 10]);
	translate([-7.1,92,-1]) rotate([0,0,-45]) cube([10, 10, 10]);
	translate([117.2,92,-1]) rotate([0,0,-45]) cube([10, 10, 10]);
}

module rep2_backplate_solid(){
	union(){
		cube([126.5, 88.4, 5.5]);
		translate([7, -7.95, 0]) cube([8.7, 8, 5.5]);
		translate([110.8, -7.95, 0]) cube([8.7, 8, 5.5]);
	}
}

module rep2_backplate_negative(){
	translate([71.9,96.2,-1]) rotate([0,0,-45]) cube([30, 30, 10]);
	translate([13.2,96.2,-1]) rotate([0,0,-45]) cube([30, 30, 10]);
	translate([34.4,75,-1]) cube([58.7, 18.9, 10]);
	translate([21.2,45,0]) cylinder(r=2.25, h=20, center=true, $fn=100);
	translate([105.4,45,0]) cylinder(r=2.25, h=20, center=true, $fn=100);
	translate([-7.2,91,-1]) rotate([0, 0, -44.3]) cube([10, 10, 10]);
	translate([119.4,91,-1]) rotate([0, 0, -44.3]) cube([10, 10, 10]);
}

module pattern(){
	union(){
		translate([0, 0, stencil_thickness/2])
		translate([offX, offY, -stencil_thickness/2])
		scale([sTrace, -sTrace, 1])
		translate([-200, -150, 0]) {
			union() {
				for (i = [1:len(points_array) -1] ) {
					linear_extrude(height=stencil_thickness*2) {polygon(points_array[i]);}
				}
			}
		}
	}
}

//////////////////////////
// Put it all together //
////////////////////////

if (Style == "Emboss" && Bot == "Rep1"){
	translate([-63.25,-40.2,0]){
		color("Red") translate([Move_Top_Text_Left_Right,Move_Top_Text_Up_Down,5.3]) rotate([0,0,top_text_rotation]) write(top_text_label,h=top_text_size,t=3, font=top_text_font, center=true);
		color("Red") translate([Move_Bottom_Text_Left_Right,Move_Bottom_Text_Up_Down,5.3]) rotate([0,0,bottom_text_rotation]) write(bottom_text_label,h=bottom_text_size,t=3, font=bottom_text_font, center=true);
		color("Red") translate([Move_Image_Left_Right,Move_Image_Up_Down,5.3]) rotate([0,0,Rotate_Image]) pattern();
			difference(){
				color("White") rep1_backplate_solid();
				rep1_backplate_negative();
		}
	}
}

else if (Style == "Deboss" && Bot == "Rep1"){
	translate([-63.25,-40.2,0]){
		difference(){
			color("White") rep1_backplate_solid();
			rep1_backplate_negative();
			color("Grey") translate([Move_Top_Text_Left_Right,Move_Top_Text_Up_Down,5.3]) rotate([0,0,top_text_rotation]) write(top_text_label,h=top_text_size,t=3, font=top_text_font, center=true);
			color("Grey") translate([Move_Bottom_Text_Left_Right,Move_Bottom_Text_Up_Down,5.3]) rotate([0,0,bottom_text_rotation]) write(bottom_text_label,h=bottom_text_size,t=3, font=bottom_text_font, center=true);
			color("Grey") translate([Move_Image_Left_Right,Move_Image_Up_Down,3.3]) rotate([0,0,Rotate_Image]) pattern();
		}
	}
}

else if (Style == "Emboss" && Bot == "Rep2"){
	translate([-63.25,-40.2,0]){
		color("Red") translate([Move_Top_Text_Left_Right,Move_Top_Text_Up_Down,5.3]) rotate([0,0,top_text_rotation]) write(top_text_label,h=top_text_size,t=3, font=top_text_font, center=true);
		color("Red") translate([Move_Bottom_Text_Left_Right,Move_Bottom_Text_Up_Down,5.3]) rotate([0,0,bottom_text_rotation]) write(bottom_text_label,h=bottom_text_size,t=3, font=bottom_text_font, center=true);
		color("Red") translate([Move_Image_Left_Right,Move_Image_Up_Down,5.3]) rotate([0,0,Rotate_Image]) pattern();
			difference(){
				color("White") rep2_backplate_solid();
				rep2_backplate_negative();
		}
	}
}

else if (Style == "Deboss" && Bot == "Rep2"){
	translate([-63.25,-40.2,0]){
		difference(){
			color("White") rep2_backplate_solid();
			rep2_backplate_negative();
			color("Grey") translate([Move_Top_Text_Left_Right,Move_Top_Text_Up_Down,5.3]) rotate([0,0,top_text_rotation]) write(top_text_label,h=top_text_size,t=3, font=top_text_font, center=true);
			color("Grey") translate([Move_Bottom_Text_Left_Right,Move_Bottom_Text_Up_Down,5.3]) rotate([0,0,bottom_text_rotation]) write(bottom_text_label,h=bottom_text_size,t=3, font=bottom_text_font, center=true);
			color("Grey") translate([Move_Image_Left_Right,Move_Image_Up_Down,3.3]) rotate([0,0,Rotate_Image]) pattern();
		}
	}
}
```


[User]
Okay, I'm looking for a parametric OpenSCAD design for a camera mount, but it's more generally useful as a flat mount for round poles. I've seen a design already, and I'd like to be able to tweak some of the key dimensions. Here's how I'd describe the mount:

The core idea is to have a flat, rectangular "base" that's designed to be mounted to a flat surface. Attached to the base, centered along the length, is a semi-circular cutout/indent that's the same shape and size as a round pole, so it can sit on the base. On either side of that cutout, there are two channels for zip ties to securely hold the pole in place. The ziptie channels should have a bit of clearance so that the tie doesn't bind when tightened.

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

*   **`mount_length`**: The length of the rectangular base.
*   **`mount_width`**: The width of the rectangular base.
*   **`pole_diameter`**: The diameter of the round pole to be mounted.
*   **`ziptie_width`**: The width of the zip tie channel.
*   **`ziptie_height`**: The height of the zip tie channel.

I'd like the design to be constructed with these elements:

1.  **Base:** A rectangular solid.
2.  **Pole Cutout:** A semi-circular cutout to accommodate the pole. This should be centered along the mount length and have a diameter slightly larger than `pole_diameter`.
3.  **Zip Tie Channels:** Two channels on either side of the pole cutout to secure the pole with zip ties. Each channel is basically a vertical extrusion from the base.

I'd also like the ability to rotate the model 90 degrees around the z-axis on the finished object, just as the initial object I shared did.

Ideally, the design would use the hull() function to create a smooth transition between the base and the semi-circular cutout. The zip tie channels should be constructed with a difference of two cylinders, one smaller inside a larger, for the channel effect.

Please generate a parametric OpenSCAD file that accomplishes this, and I'd like to make sure it's easy to adjust all of these parameters. I don't need any special libraries for this, basic primitives should be fine.

[Assistant]
cameramount.scad:
```
$fn=60+4;

//camera mount pole mounting legnth
camera_mount_lenght = 100 ;

//camera mount pole mount width
camera_mount_width = 40 ;

//camera leg pole diameter
pole_diameter = 22.5 ;

//ziptie width for atatchment add a bit for clearance
ziptie_width = 4 ;

//ziptie height for atatchment
ziptie_height = 2 ;

pole_diameter2 = pole_diameter/2;

centre_point = pole_diameter2+5+ziptie_height ;

rotate([0,0,90])difference(){
	hull(){
		translate([0,0,1])cube([camera_mount_lenght,camera_mount_width,2],true);
		difference(){
			translate([0,0,centre_point])rotate([0,90,0])cylinder(camera_mount_lenght,pole_diameter2-0.1,pole_diameter2-0.1,true);
			translate([0,0,centre_point+pole_diameter2])cube([camera_mount_lenght+2,pole_diameter+2,pole_diameter],true);
			}
		}
	translate([0,0,centre_point])rotate([0,90,0])cylinder(camera_mount_lenght+0.2,pole_diameter2,pole_diameter2,true);
//	translate([0,0,centre_point])cube([camera_mount_lenght+pole_diameter2,camera_mount_width+pole_diameter2,10],true);
	translate([camera_mount_lenght/2-10,0,0])zip();
	zip();
	translate([-camera_mount_lenght/2+10,0,0])zip();
	}

module zip(){
	translate([0,0,centre_point])rotate([0,90,0]){
		difference(){
			cylinder(ziptie_width,pole_diameter2+2.5+ziptie_height,pole_diameter2+2.5+ziptie_height,true);
			cylinder(ziptie_width+0.2,pole_diameter2+2.5,pole_diameter2+2.5,true);
			}
		}
	}
```


[User]
Okay, I'm looking to create a design for a customizable ball with holes drilled through it, and I'd like your help creating the OpenSCAD file.

Essentially, I want a sphere with three cylindrical holes bored through it, all intersecting at the sphere's center. These holes should be oriented along the X, Y, and Z axes.

Here's what I need to be parametric:

1.  **Overall Size:** The diameter of the sphere should be a parameter that I can adjust. Let's call this parameter `ball_diameter`.
2.  **Hole Size:** The diameter of the cylindrical holes should also be adjustable. Let's call this parameter `hole_diameter`.
3. **Hole Length:** Although the cylinders need to pass through the sphere, it would be great to have a little flexibility. Let's make the length of the cylinder adjustable, so I can make them extend further than necessary and clean them up. The length will be measured from center of the sphere and will be called `hole_length`. This parameter will allow me to control how far the cylinders extend beyond the sphere if necessary.

I also want it to be easy to visualize the final result. It's important to me to be able to tweak these three values (ball diameter, hole diameter, hole length) and see the changes reflected.

Could you create an OpenSCAD file with these parameters that implements this design? I am fine with your decision on how long to make the cylinders as a default, as long as it makes sense and doesn't require me to do extra math.

[Assistant]
Cool_Ball.scad:
```

module example001()
{
	function r_from_dia(d) = d / 2;

	module rotcy(rot, r, h) {
		rotate(90, rot)
			cylinder(r = r, h = h, center = true);
	}

	difference() {
		sphere(r = r_from_dia(size));
		rotcy([0, 0, 0], cy_r, cy_h);
		rotcy([1, 0, 0], cy_r, cy_h);
		rotcy([0, 1, 0], cy_r, cy_h);
	}

	size = 50;
	hole = 25;

	cy_r = r_from_dia(hole);
	cy_h = r_from_dia(size * 2.5);
}

example001();

```


[User]
Okay, I've got this ergonomic handle design in OpenSCAD, but it's a bit fiddly to adjust the shape. It's based on adding and subtracting scaled and rotated spheres and toruses, which is hard to visualize and tweak. I'd really like to have a parametric version that's easier to work with, and that's more intuitive.

Specifically, the current design uses parameters like `asz`, `atz`, `bsx`, `bsy`, `bsz`, `balpha`, `btx`, `btz`, and so on, which control individual spheres and their placement. Then, it has similar parameters for toruses, `e0r1`, `e0r2`, etc.  It all works, but it's not very user-friendly.

What I'd love is a parametric design where I can control the following general aspects of the handle in a more intuitive way:

1.  **Overall Size:** I want a single parameter, or a few, to easily scale the whole handle, or perhaps its length, width, and thickness independently. The current `s` parameter is a good start but it's mixed with other scaling values and i'd prefer for it to not affect the other values
2.  **Grip Profile:** Instead of adding spheres that I rotate and scale, can we have parameters to control a smoother grip profile? Things like:
    *   **Grip Curve:** A parameter to define the overall curviness of the grip. Maybe a number of points along the side profile of the grip that I can adjust vertically or maybe a way to control the curve with a Bezier control handle like in a 2D editor.
    *   **Front and Back Bulges:**  Parameters to control how much the handle bulges out in the front and back. Maybe this can be controlled with the height, width, and x displacement from the center.
    *   **Top and Bottom Height:** Parameters to adjust the maximum height of the grip at the top and the bottom.
    *  **Overall Handle Length:** A parameter to adjust how long the handle is from bottom to top.
3.  **Finger Grooves:**  Instead of using a series of toruses to 'cut away', could we have explicit parameters for controlling finger grooves?
    *   **Number of Grooves:** A parameter to adjust the number of finger grooves (0 or more).
    *   **Groove Depth and Width:** Parameters to control the depth and width of the grooves
    *   **Groove Position:** Parameters to control where the finger grooves begin and end and the spacing between them.
4. **Connection to Pole/Object:** Rather than the suggestion to bore a hole in the base, can we have parameters that allow for:
    *   **Connection Type:** Specify the shape of the connector at the base (circle, square, hex, custom)
    *   **Connector Size:** A parameter for the connector diameter/size.
    *   **Connector Length:** A parameter to adjust the depth of the connection.

I would prefer for this design to be parametric, meaning that you can create a handle for specific requirements based on an input config. For instance, a config could specify the type of connector, the height of the grip, the overall length of the grip, the finger groove positions, etc.

The final model should be a solid that can be printed.

I understand this is a fairly involved request. I'm not expecting it to be perfect, but I am hoping to get something that's more easily adjustable for different hand sizes and grip preferences than my current design.

I'm not using any special libraries in my current SCAD file, so please don't assume any. If you think a library could help make this easier to design, please suggest one and the code examples should use that library.

[Assistant]
Ergonomic-Handle.scad:
```
// 2013 Lukas Süss aka mechadende
// License: public domain
// yzorgs trekking pole grip - ported to openscad
// derived from http://www.thingiverse.com/thing:42998

$fa= 5;
$fs=0.2;

//base size
s=22;

// z scale bottom ellipsoid
asz=1.4;
// z translate bottom ellipsoid
atz = 0.4;
//---------------
bsx = 0.47;
bsy = 0.47;
bsz = 1.7;
balpha = 13;
btx = 0.45;
btz = 2.2;
//---------------
csx = 0.6;
csy = 0.6;
csz = 2.0;
calpha = 5;
ctx = -0.2;
ctz = 2.2;
//---------------
dsx = 0.9;
dsy = 0.9;
//dsz=1.6 for yzorgs original style
dsz = 1.1;
dalpha = 110;
dtx = 0.05;
dtz = 4.3;
//###############
e0r1 = 0.5;
e0r2 = 2.0;
e0sx = 3.5;
e0sy = 1;
e0sz = 1.7;
e0alpha = 5;
e0tx = -0.6;
e0tz = 1.3;
//---------------
e1r1 = 0.5;
e1r2 = 1.4;
e1sx = 2.5;
e1sy = 1;
e1sz = 1.7;
e1alpha = 2;
e1tx = -0.6;
e1tz = 1.9;
//---------------
e2r1 = 0.5;
e2r2 = 1.4;
e2sx = 2.1;
e2sy = 1;
e2sz = 1.7;
e2alpha = 10;
e2tx = -0.55;
e2tz = 2.5;
//---------------
e3r1 = 0.5;
e3r2 = 1.4;
e3sx = 2.5;
e3sy = 1;
e3sz = 1.7;
e3alpha = -8;
e3tx = -0.45;
e3tz = 3.4;
//---------------
show_1ccm_cube = false;

if(show_1ccm_cube==true)
{
  //size estimation cube
  translate([-s*2,0,0]) cube([10,10,10]);
}

difference()
{
union()
{
  // Bottom Part A
  translate([0,0,atz*s]) scale([1,1,asz])sphere(s);

  //Back Part B
  translate([btx*s,0,btz*s]) rotate(balpha,[0,1,0])
    scale([bsx,bsy,bsz]) sphere(s);

  //Front Part C
  translate([ctx*s,0,ctz*s]) rotate(calpha,[0,1,0])
    scale([csx,csy,csz]) sphere(s);

  //Top Part D
  translate([dtx*s,0,dtz*s]) rotate(dalpha,[0,1,0])
    scale([dsx,dsy,dsz]) sphere(s);
}
union()
{
  translate([0,0,-50*s]) cube([10*s,10*s,100*s],center=true);
  //Cut0
  translate([e0tx*s,0,e0tz*s]) rotate(e0alpha,[0,1,0])
    scale([e0sx,e0sy,e0sz]) torus(s*e0r1,s*e0r2);
  //Cut1
  translate([e1tx*s,0,e1tz*s]) rotate(e1alpha,[0,1,0])
    scale([e1sx,e1sy,e1sz]) torus(s*e1r1,s*e1r2);
  //Cut2
  translate([e2tx*s,0,e2tz*s]) rotate(e2alpha,[0,1,0])
    scale([e2sx,e2sy,e2sz]) torus(s*e2r1,s*e2r2);
  //Cut3
  translate([e3tx*s,0,e3tz*s]) rotate(e3alpha,[0,1,0])
    scale([e3sx,e3sy,e3sz]) torus(s*e3r1,s*e3r2);
}
}

module torus(r1,r2)
{
  translate([r2-r1,0,0])
    rotate_extrude(convexity=4) translate([r2,0,0]) circle(r=r1);
}

```


[User]
Okay, I'm looking for a parametric OpenSCAD design for a clock hanger that will hook over the top of my cubical wall. I have a specific set of requirements and I'd like to be able to adjust these easily.

Here's what I need:

**General Structure:**

*   The hanger should have a "top" section that rests on the cubicle wall, a "back" section that extends down the back of the wall, and a "front" section that extends down the front of the wall. Think of it like a block C that is rotated 90 degrees and mirrored in the X axis, where the open part of the C is facing up and to the left, the back section goes down, and the front section goes down.
*   The top, back, and front sections should all be connected smoothly.
*   I need to be able to adjust the thickness of the cubicle wall the hanger will fit on. I'll call this `wall_thickness`.
*   I need to control the height of the back section, which I'll call `back_height`.
*   I also need to control the height of the front section, which I'll call `front_height`.
*   I'd like to control the overall resolution of the curves, so I'll need a `resolution` parameter which will be used for `$fn`.
*   The width of the entire hanger should be adjustable with a parameter called `hanger_width`.
*   Finally, I need to be able to set the thickness of the plastic used for the hanger with a parameter called `hanger_thickness`.

**Hook Details:**

*   There needs to be a "hook" on the front section to hang the clock from. This hook will be a keyhole shape so the clock can be easily lifted off while still being secure.
*   The hook needs a `hook_diameter` for the larger circle at the top of the keyhole.
*   The `hook_depth` controls the depth of the larger part of the keyhole, and should be shallow for easy hanging.
*   The smaller part of the keyhole, the "bar", will have a `bar_diameter`.
*  The `bar_depth` controls the thickness of the bar section of the keyhole.
*  The center of the larger diameter keyhole shall be vertically centered on the front section, with a depth of `hook_depth`, and its center point located relative to the top of the front face at `front_height - (hook_diameter / 2)`. The bar section should have its center point at `front_height - (hook_diameter / 2)`.
*  The x position of the keyhole should be adjustable and should start away from the main structure by an additional `hanger_thickness / 2`, and then be offset from the edge of the "front" section by an additional amount of `hook_depth + bar_depth` and be directly offset from the front section edge.

**Additional Requirements:**

*   All edges should be rounded with a consistent `edge_radius`.
*   The design should be parametric so that all the values I've mentioned can be changed and the hanger will adjust accordingly.
*   I'd prefer to avoid any libraries if possible, or if you must use one, use the BOSL library.

Could you generate the OpenSCAD code for this? I think I've provided all the necessary information, but please let me know if you need anything else.

[Assistant]
clock_stand.scad:
```
// preview[view:south west, tilt:top diagonal]

/* [General Settings] */
// How thick is the cubical wall?
wall_thickness = 50;//[15:75]

// How long should the back side be?
back_height = 50;//[15:100]

// How long should the front side be?
front_height = 100;//[30:150]

// Adjust the resolution
resolution = 32;//[16:36]
$cf=resolution;

// How wide should the hanger be?
hanger_width = 35;//[5:75]

// How thick should the plastic be?
hanger_thickness = 5;//[2:10]

/* [Hook Settings] */
// Diameter of the hook (this should be smaller than the hole for clearance).
hook_diameter = 7;//[1:25]

// Thickness of the hook (shallower than hole depth for clearance).
hook_depth = 2;//[1:10]

// Diameter of the bar (this should be smaller than the smallest part of the hole for clearance).
bar_diameter = 5;//[1:20]

// Length of the hook bar (slightly larger than keyhole material thickness).
bar_depth = 2;//[1:10]

/* [Hidden] */

edge_radius = 1;

main(); //runs program

module main(){

	translate( [-wall_thickness / 2, front_height / 2, hanger_width / 2 + edge_radius / 2] ) rotate( a=[ 90, 0, 0] ) {
		//Top
		translate( [( wall_thickness + hanger_thickness ) / 2, 0, 0] ) {
			roundedRect( size = [( wall_thickness + 2 * hanger_thickness ), hanger_width, hanger_thickness], radius = edge_radius );
		}

		//Back
		translate( [0, 0, hanger_thickness] ) {
			roundedRect( size = [hanger_thickness, hanger_width, back_height], radius = edge_radius );
		}

		//Front
		difference() {
			translate( [( wall_thickness + hanger_thickness ), 0, hanger_thickness] ) roundedRect( size = [hanger_thickness, hanger_width, front_height], radius = edge_radius );
			translate( [( wall_thickness + 1.5 * hanger_thickness + hook_depth + bar_depth ), 0, ( front_height - ( hook_diameter / 2 ) + hook_depth - 0.5 * hanger_thickness )] ) rotate(a=[0, 270, 0]) cylinder( h = bar_depth + 2 * hanger_thickness, r = ( bar_diameter / 2 ), $fn = $cf );
		}
	}

	//Hooks
	drawHook();
}

module drawHook() {

	large_radius = ( hook_diameter / 2 );
	small_radius = ( bar_diameter / 2 );

	cylinder( h = hook_depth, r1 = large_radius, r2 = large_radius, $fn = $cf );

	translate( [ 0, 0, hook_depth ] ) {

		cylinder( h = bar_depth + hanger_thickness, r1 = small_radius, r2 = small_radius, $fn = $cf );

		intersection() {

			translate( [0, -small_radius, 0] ) {
				cube( [hook_diameter, bar_diameter, bar_depth] );
			}

			cylinder( h = bar_depth, r1 = large_radius, r2 = large_radius, $fn = $cf );
		}
	}
}

module roundedRect( size, radius ) {

	x = size[0];
	y = size[1];
	z = size[2];

	linear_extrude( height = z )

	hull() {

		// place 4 circles in the corners, with the given radius
		translate( [( -x / 2 ) + ( radius / 2 ), ( -y / 2 ) + ( radius / 2 ), 0] ) circle( r = radius );

		translate( [( x / 2 ) - ( radius / 2 ), ( -y / 2 ) + ( radius / 2 ), 0] ) circle( r = radius );

		translate( [( -x / 2 ) + ( radius / 2 ), ( y / 2 ) - ( radius / 2 ), 0] ) circle( r = radius );

		translate( [( x / 2 ) - ( radius / 2 ), ( y / 2 ) - ( radius / 2 ), 0] ) circle( r = radius );
	}
}
```
clock_stand.scad:
```
// preview[view:south west, tilt:top diagonal]

/* [General Settings] */
// How thick is the cubical wall?
wall_thickness = 50;//[15:75]

// How long should the back side be?
back_height = 50;//[15:100]

// How long should the front side be?
front_height = 100;//[30:150]

// Adjust the resolution
resolution = 32;//[16:36]
$cf=resolution;

// How wide should the hanger be?
hanger_width = 35;//[5:75]

// How thick should the plastic be?
hanger_thickness = 5;//[2:10]

/* [Hook Settings] */
// Diameter of the hook (this should be smaller than the hole for clearance).
hook_diameter = 7;//[1:25]

// Thickness of the hook (shallower than hole depth for clearance).
hook_depth = 2;//[1:10]

// Diameter of the bar (this should be smaller than the smallest part of the hole for clearance).
bar_diameter = 5;//[1:20]

// Length of the hook bar (slightly larger than keyhole material thickness).
bar_depth = 2;//[1:10]

/* [Hidden] */

edge_radius = 1;

main(); //runs program

module main(){

	translate( [-wall_thickness / 2, front_height / 2, hanger_width / 2 + edge_radius / 2] ) rotate( a=[ 90, 0, 0] ) {
		//Top
		translate( [( wall_thickness + hanger_thickness ) / 2, 0, 0] ) {
			roundedRect( size = [( wall_thickness + 2 * hanger_thickness ), hanger_width, hanger_thickness], radius = edge_radius );
		}

		//Back
		translate( [0, 0, hanger_thickness] ) {
			roundedRect( size = [hanger_thickness, hanger_width, back_height], radius = edge_radius );
		}

		//Front
		difference() {
			translate( [( wall_thickness + hanger_thickness ), 0, hanger_thickness] ) roundedRect( size = [hanger_thickness, hanger_width, front_height], radius = edge_radius );
			translate( [( wall_thickness + 1.5 * hanger_thickness + hook_depth + bar_depth ), 0, ( front_height - ( hook_diameter / 2 ) + hook_depth - 0.5 * hanger_thickness )] ) rotate(a=[0, 270, 0]) cylinder( h = bar_depth + 2 * hanger_thickness, r = ( bar_diameter / 2 ), $fn = $cf );
		}
	}

	//Hooks
	drawHook();
}

module drawHook() {

	large_radius = ( hook_diameter / 2 );
	small_radius = ( bar_diameter / 2 );

	cylinder( h = hook_depth, r1 = large_radius, r2 = large_radius, $fn = $cf );

	translate( [ 0, 0, hook_depth ] ) {

		cylinder( h = bar_depth + hanger_thickness, r1 = small_radius, r2 = small_radius, $fn = $cf );

		intersection() {

			translate( [0, -small_radius, 0] ) {
				cube( [hook_diameter, bar_diameter, bar_depth] );
			}

			cylinder( h = bar_depth, r1 = large_radius, r2 = large_radius, $fn = $cf );
		}
	}
}

module roundedRect( size, radius ) {

	x = size[0];
	y = size[1];
	z = size[2];

	linear_extrude( height = z )

	hull() {

		// place 4 circles in the corners, with the given radius
		translate( [( -x / 2 ) + ( radius / 2 ), ( -y / 2 ) + ( radius / 2 ), 0] ) circle( r = radius );

		translate( [( x / 2 ) - ( radius / 2 ), ( -y / 2 ) + ( radius / 2 ), 0] ) circle( r = radius );

		translate( [( -x / 2 ) + ( radius / 2 ), ( y / 2 ) - ( radius / 2 ), 0] ) circle( r = radius );

		translate( [( x / 2 ) - ( radius / 2 ), ( y / 2 ) - ( radius / 2 ), 0] ) circle( r = radius );
	}
}
```


[User]
Okay, I need an OpenSCAD design for a credit card-sized ID badge holder, like for a conference or event. I've been playing around with a version but I want a more robust, parametric design that's easier to customize.

Here are the key requirements:

*   **Card Size:** The holder should fit a standard credit card-sized card (approximately 85.6mm x 54mm x 0.76mm). I want to have some clearance to slide the card in and out easily, so I'm thinking maybe a 0.5mm margin on all dimensions is good.
*   **Wall Thickness:** The walls of the holder should have a configurable thickness, let's call it `wall`. I was using 1.6mm but I want to make this a parameter so I can try other values.
*   **Overall Dimensions:** The overall dimensions of the holder will be derived from the card size, wall thickness, and margins, but it would be good to be able to specify a margin if i wanted something larger for the outside of the holder too, I can set that to 0 for now.
*   **Strap Attachment:** The holder needs a strap attachment point on one of the long sides. This attachment should be a solid piece extending out with a hole for a lanyard or clip. I used a 15mm length for it, and a cylinderical hole in it, but I'd like both to be configurable.
*   **Text Engraving:** I want to be able to engrave text on the strap piece, rotated to be readable when worn. The text, font, text size, and text thickness should be easily adjustable as parameters. I'm using "orbitron.dxf" in my current design, but I'd like a parameter to change that.
*   **Top Stops:** The top edges of the main holder need to have stops that prevent the card from sliding out when the holder is oriented vertically. I used these in my current design that are thin rails with rounded ends, the rail length, thickness and offset from the top needs to be configurable.
*   **Card Slot:** The holder should have a slot, so you can slide the card in and out. I want the height of the card slot to be configurable. It would also be nice to have the option to add a small lip to keep the card secure.
*   **Rounded edges**: All edges of the holder should be slightly rounded for comfort.

**Parameters:**

I'd like the design to use these parameters (I'm using names similar to what I was using previously, but they're going to be much more flexible in the new design):

*   `cardWidth`: Width of the card (default around 87mm)
*   `cardLength`: Length of the card (default around 55.5mm)
*   `cardThickness`: Thickness of the card (default around 0.76mm)
*   `cardMargin`: Margin around the card for clearance (default around 0.5mm)
*    `holderMargin`: Margin around the holder (default around 0mm)
*   `wall`: Thickness of the holder walls (default 1.6mm)
*   `strapLength`: Length of the strap attachment (default 15mm)
*  `strapHoleRad`: Radius of the strap hole (default 1.5mm)
*  `strapHoleClearance`: Distance of the Strap hole from the wall.
*  `strapHoleClearanceL`: Distance of the Strap hole from the end of the strap.
*   `engraveText`: Text to engrave on the strap (default "CLONE WARS")
*   `engraveTextSize`: Size of the engraved text (default 6mm)
*   `engraveTextThickness`: Thickness of the engraved text (default 0.6mm)
*    `engraveFont`: The font to use for engraving, using a .dxf (default "orbitron.dxf")
*   `stopOffset`: The offset of the top stops from the top of the holder (default 20mm)
*   `stopLength`: The Length of the stop pieces (default `cardHolderW- 40`)
*   `stopThickness`: The thickness of the stop pieces (default 2*wall)
*   `stopClearance`: The distance of the stop pieces from the edge of the card (default 8mm).
*    `slotHeight`: the height of the slot (default to 0.8 for a single card.)
*   `roundRadius`: Radius for rounded edges of holder (default 1mm)

**Libraries:**

I believe my previous attempt used the `write.scad` library which I'd like to include.

**Output:**

I'm expecting a single OpenSCAD `.scad` file with all the parameters and modules defined. Please make it well-commented so it is easy to understand and modify. It would be very useful if the file had an example instantiation at the end that shows how to use the modules with some example parameter values. I want to be able to easily change those parameters and re-render.

[Assistant]
passCard.scad:
```
use <write.scad>

cardMarginPer = 0.5;
cardMarginH = 0.5;
cardWidth = 87 + cardMarginPer;
cardLength = 55.5 + cardMarginPer;
cardHight  = 3*0.76 + cardMarginH;

wall = 1.6;

cardHolderW = wall + cardWidth;
cardHolderL = wall + cardLength;
cardHolderH = wall + cardHight;

myText = "CLONE WARS";

holderL = 15;

numSpheres = 8;
diam = 15;
cylinderRad = 1.6;

module card ( w, l, h )
{
	cube ( [w, l, h] );
}

module d1CardStrap ()
{
	difference ()
	{
		translate ( [cardHolderW, 0, 0] )
		{
			card ( holderL, cardHolderL, wall );
			translate ( [0.6,cardHolderL-9,wall] )
				rotate ([0,0,-90])
					write(myText,h=6,t=0.6, font="orbitron.dxf");
		}
		//	cutting angles of strap
		translate ( [cardHolderW+holderL, 0, 0] )
		{
			rotate ([0,0,180])
			{
				cylinder ( r=holderL+wall, h=10, $fn=3, center=true );
			}
		}
		translate ( [cardHolderW+holderL, cardHolderL, 0] )
		{
			rotate ([0,0,180])
			{
				cylinder ( r=holderL+wall, h=10, $fn=3, center=true );
			}
		}

		// Strap hole
		translate ( [(cardHolderW+(holderL/2)+1.4), cardHolderL/2-5, -1] )
		{
			card (3, 10, 10);
			translate ([1.5,0,-1])
				cylinder ( r=1.5, h=10, $fn=10 );
			translate ([1.5,10,-1])
				cylinder ( r=1.5, h=10, $fn=10 );
			translate ([1.5,5,-5])
				cylinder ( r=3, h=10, , $fn=20 );

		}
	}
}

module topStops ()
{
	translate ( [ 20, 0, cardHolderH ] )
	{
		union ()
		{
			card ( cardHolderW - 40, 2*wall,  wall );
			// Round the ends
			translate ( [0, wall, 0] )
				cylinder ( r=wall, h=wall, $fn=10 );
			translate ( [cardHolderW - 40, wall, 0] )
				cylinder ( r=wall, h=wall, $fn=10 );
		}
	}
	translate ( [ 20, cardHolderL-(2*wall), cardHolderH] )
	{
		union ()
		{
			card ( cardHolderW - 40, 2*wall,  wall );
			// Round the ends
			translate ( [0, wall, 0] )
				cylinder ( r=wall, h=wall, $fn=10 );
			translate ( [cardHolderW-40, wall, 0] )
				cylinder ( r=wall, h=wall, $fn=10 );
		}
	}

}

module d1CardHolder ()
{
	union() {
	difference ()
	{
		difference ()
		{
			card (cardHolderW, cardHolderL, cardHolderH);
			translate ( [5, 8, -wall] )
				card ( cardHolderW - 40, 2*wall, 4*wall );

			translate ( [5, cardHolderL - 2*wall - 8, -wall] )
				card ( cardHolderW - 40, 2*wall, 4*wall );

			translate ([wall,wall,wall])
				card (cardHolderW, cardHolderL-2*wall, cardHolderH);
		}
		translate ([0, (cardHolderL)/2, 0])
			cylinder (  h=10, r = 8, center=true);
	}

	translate ( [10, 15, wall] )
		card ( cardHolderW - 60, 0.5, 0.3 );

	translate ( [10, cardHolderL - 2*wall -15, wall] )
		card ( cardHolderW - 60, 0.5, 0.3 );

//	// Top overhang
	topStops();
	d1CardStrap();
	}
}

d1CardHolder();
translate ([wall, wall, wall])
{
	*#card ( 86, 54, 0.8 );
}

```
passCard.scad:
```
use <write.scad>

cardMarginPer = 0.5;
cardMarginH = 0.5;
cardWidth = 87 + cardMarginPer;
cardLength = 55.5 + cardMarginPer;
cardHight  = 0.76 + cardMarginH;

wall = 1.6;

cardHolderW = wall + cardWidth;
cardHolderL = wall + cardLength;
cardHolderH = wall + cardHight;

myText = "CLONE WARS";

holderL = 15;

numSpheres = 8;
diam = 15;
cylinderRad = 1.6;

module card ( w, l, h )
{
	cube ( [w, l, h] );
}

module d1CardStrap ()
{
	difference ()
	{
		translate ( [cardHolderW, 0, 0] )
		{
			card ( holderL, cardHolderL, wall );
			translate ( [0.6,cardHolderL-9,wall] )
				rotate ([0,0,-90])
					write(myText,h=6,t=0.6, font="orbitron.dxf");
		}
		//	cutting angles of strap
		translate ( [cardHolderW+holderL, 0, 0] )
		{
			rotate ([0,0,180])
			{
				cylinder ( r=holderL+wall, h=10, $fn=3, center=true );
			}
		}
		translate ( [cardHolderW+holderL, cardHolderL, 0] )
		{
			rotate ([0,0,180])
			{
				cylinder ( r=holderL+wall, h=10, $fn=3, center=true );
			}
		}

		// Strap hole
		translate ( [(cardHolderW+(holderL/2)+1.4), cardHolderL/2-5, -1] )
		{
			card (3, 10, 10);
			translate ([1.5,0,-1])
				cylinder ( r=1.5, h=10, $fn=10 );
			translate ([1.5,10,-1])
				cylinder ( r=1.5, h=10, $fn=10 );
			translate ([1.5,5,-5])
				cylinder ( r=3, h=10, , $fn=20 );

		}
	}
}

module topStops ()
{
	translate ( [ 20, 0, cardHolderH ] )
	{
		union ()
		{
			card ( cardHolderW - 40, 2*wall,  wall );
			// Round the ends
			translate ( [0, wall, 0] )
				cylinder ( r=wall, h=wall, $fn=10 );
			translate ( [cardHolderW - 40, wall, 0] )
				cylinder ( r=wall, h=wall, $fn=10 );
		}
	}
	translate ( [ 20, cardHolderL-(2*wall), cardHolderH] )
	{
		union ()
		{
			card ( cardHolderW - 40, 2*wall,  wall );
			// Round the ends
			translate ( [0, wall, 0] )
				cylinder ( r=wall, h=wall, $fn=10 );
			translate ( [cardHolderW-40, wall, 0] )
				cylinder ( r=wall, h=wall, $fn=10 );
		}
	}

}

module d1CardHolder ()
{
	union() {
	difference ()
	{
		difference ()
		{
			card (cardHolderW, cardHolderL, cardHolderH);
			translate ( [5, 8, -wall] )
				card ( cardHolderW - 40, 2*wall, 4*wall );

			translate ( [5, cardHolderL - 2*wall - 8, -wall] )
				card ( cardHolderW - 40, 2*wall, 4*wall );

			translate ([wall,wall,wall])
				card (cardHolderW, cardHolderL-2*wall, cardHolderH);
		}
		translate ([0, (cardHolderL)/2, 0])
			cylinder (  h=10, r = 8, center=true);
	}

	translate ( [10, 15, wall] )
		card ( cardHolderW - 60, 0.5, 0.3 );

	translate ( [10, cardHolderL - 2*wall -15, wall] )
		card ( cardHolderW - 60, 0.5, 0.3 );

//	// Top overhang
	topStops();
	d1CardStrap();
	}
}

d1CardHolder();
translate ([wall, wall, wall])
{
	*#card ( 86, 54, 0.8 );
}

```


[User]
Okay, so I'm trying to design a customizable ring, specifically one that's similar to those Wizard Rings, you know, the ones that snap together? I have an existing OpenSCAD file that gets me pretty close, but it has some limitations, and I'd like to make it more robust and parametric.

Here’s what I’m looking for in this new design:

1.  **Ring Size:** I need the ring to be easily resizable using a numerical input representing the inner diameter of the ring. I have a list of US ring sizes that should be used to control this diameter.  This should be a single customizable variable.
2.  **Ring Width:** The width of the ring should also be customizable, again using a simple numerical input.
3.  **Ring Thickness:** The thickness of the ring (how "tall" it is when printed) should be adjustable.
4. **Ring Shape:** The main body of the ring should be an octagon, created using the `octagon` module from the `MCAD/shapes.scad` library. The inner cut should also be octagonal.
5.  **Snap Feature:**  I need a snap feature so that two halves of the ring can fit together. The existing file has it, but the position of the snap feature is getting thrown off when the width is changed. The snap should be robust and ideally, I’d like the position of the snap to be more stable and predictable when other parameters like width change, and it should be adjusted to fit properly. The snap feature consists of a rectangular peg and a corresponding cylindrical hole/recess.
6.  **Snap Alignment:** The rectangular snap peg should be on one half of the ring and the corresponding cylindrical snap hole should be on the other.  It must be positioned correctly so the parts fit together.

7. **Protrusion Check:** As the description of the file mentions, the snap can "protrude" when thickness is set too high. A boolean option to disable or fix that would be helpful as well.

In summary, I want a fully parametric OpenSCAD design for a snap-together ring using the `MCAD/shapes.scad` library. The core features to control should be ring size, width, and thickness, with a correctly implemented snap that doesn’t get offset with changes, and an optional "protrusion check." I would greatly appreciate it if the code were well documented and easy to follow, as I'm still learning OpenSCAD.

[Assistant]
scadwizring.scad:
```
include <MCAD/shapes.scad>

//CUSTOMIZER VARIABLES

//(US Ring Sizes)
ring_size = 18.14;//[11.63:0,11.84:0.25,12.04:0.5,12.24:0.75,12.45:1,12.65:1.25,12.85:1.5,13.06:1.75,13.26:2,13.46:2.25,13.67:2.5,13.87:2.75,14.07:3,14.27:3.25,14.48:3.5,14.68:3.75,14.88:4,15.09:4.25,15.29:4.5,15.49:4.75,2215.9:5.25,16.1:5.5,16.31:5.75,16.51:6,16.71:6.25,16.92:6.5,17.12:6.75,17.32:7,17.53:7.25,17.73:7.5,17.93:7.75,18.14:8,18.34:8.25,18.54:8.5,18.75:8.75,18.95:9,19.15:9.25,19.35:9.5,19.56:9.75,19.76:10,19.96:10.25,20.17:10.5,20.37:10.75,20.57:11,20.78:11.25,20.98:11.5,21.18:11.75,21.39:12,21.59:12.25,21.79:12.5,22:12.75,22.2:13,22.4:13.25,22.61:13.5,22.81:13.75,23.01:14,23.22:14.25,23.42:14.5,23.62:14.75,23.83:15,24.03:15.25,24.23:15.5,24.43:15.75,24.64:16]

//CUSTOMIZER VARIABLES END
ring_width = 9.36;//[6:12]
ring_thickness = 2.8;
inner_diameter = ring_size;
inner_radius = inner_diameter/2;

translate([0,0,ring_width/2])

ring();
module ring() {

difference(){

		difference(){

			difference(){

				translate([0,0,0])
					octagon(inner_diameter+ring_thickness,ring_width);
				scale(font_scale);

			}

			octagon(inner_diameter,ring_width+1);
		}

rotate([0,0,270]){
translate([0,-inner_radius*cos(67.5)+1,-ring_width/2,]){
cube([ring_thickness+inner_radius,inner_diameter*cos(67.5)-2,11.4]);
}}}
}

//Now for the snap
translate([-13,inner_radius,-1]){
cube([26,2.8,11.4]);
}
translate([0,2.8+inner_radius,11.4/2-1]){
rotate([270,90,0]){
cylinder(1.17,2.4,1.8,center=yes);
}
}

```


[User]
Okay, I've designed a basic linear bearing in OpenSCAD and it's working well, but I'd like to make it more robust and customizable. Here's what I've got so far, and what I'm looking for:

**Current Design:**

The current design is a cylindrical bearing with a main body, an inner bore, and a series of cutouts for clearance that I made by subtracting rotated cubes. It's based on the following parameters:

*   **outer_diameter:** The outer diameter of the bearing.
*   **inner_diameter:** The inner diameter of the bearing, which fits on the linear rod.
*   **sidewall_thickness:** The thickness of the bearing wall.
*   **height:** The overall height of the bearing.
*   **split_bearing:** A boolean (Yes/No) that allows it to be a full cylinder, or split down the side in half, making it easier to insert onto a rod.
*   **resolution:** The number of segments for circles, which we can leave as 200 for now
*   **fudge:** A small value to allow for tolerances. It is used to adjust the size of cylinders and cuboids used to cut out the interior shape so that the parts connect as intended.

The current OpenSCAD code for it is included below.

```
/* [Linear Bearing] */

// Outer Diameter (mm)
outer_diameter = 14.8;
outer_radius = outer_diameter / 2;

// Inner Diameter (mm)
inner_diameter = 8;
inner_radius = inner_diameter / 2;

// Sidewall Thickness (mm)
sidewall_thickness = 2;

// Height (mm)
height = 12;

// Split Bearing?
split_bearing = "Yes";  // [Yes,No]

/* [Hidden] */
resolution = 200;
fudge = .1;

module half_bearing() {
	rotate([0,0,-15])
	difference() {
		cylinder(r = outer_radius, h = height, $fn = resolution);

		translate([0,0,-fudge])
		cylinder(r = inner_radius, h = height + fudge * 2, $fn = resolution);

		for (r = [-90, -60, -30, 0, 30, 60, 90])
			rotate([0,0,r])
			translate([0,0,height/2 - fudge])
			cube([inner_radius/4,outer_radius * 2 - sidewall_thickness,height + fudge * 4], center = true);

		rotate([0,0,15])
		translate([0,-outer_radius * 1.1,-fudge])
		cube([outer_radius,outer_radius * 2.2,height + fudge * 4]);
	}
}

if (split_bearing == "Yes") {
	translate([-1,0,0])
	half_bearing();
	translate([1,0,0])
	rotate([0,0,180])
	half_bearing();
} else {
	half_bearing();
	rotate([0,0,180])
	half_bearing();
}
```

**Desired Improvements and Features:**

I'd like a more sophisticated parametric version that incorporates the following:

1.  **Chamfer:** Add a chamfer to the inner and outer edges of the bearing to ease insertion onto linear rods and into housings. I'd like the chamfer angle to be customizable as a variable, and for it to not impact the `height` parameter.
2.  **Slightly Tapered Bore:**  Add an option to make the inner bore slightly tapered, perhaps with a small difference between the inner radius at the top and bottom of the bearing. This is to account for tolerances and improve the contact pattern along the rod.
3.  **Number of Clearance Cuts:** Right now the number of clearance cuts is fixed. I'd like to make this customizable, where I can specify the `number_of_cuts` and have them spaced evenly around the circumference.
4.  **Cutout Dimensions:** I'd like to control the dimensions of each individual cutout, including their width, depth, and height, rather than relying on the current method of rotating and scaling cubes.
5.  **Material Choice:** I'm going to print this from PLA, but I'd like to add a note as a comment about material choice considerations for things like thermal expansion and strength.

I'd like a parametric OpenSCAD file that incorporates these changes. I think it'd be useful to have a named `bearing_module()` that accepts the parameters and generates the bearing, and that then calls a separate `half_bearing()` if the `split_bearing` variable is set to true. I don't want to use any external libraries beyond the built in OpenSCAD features. Can you help with that?

[Assistant]
Linear_Bearing_-_v4.scad:
```
/* [Linear Bearing] */

// Outer Diameter (mm)
outer_diameter = 14.8;
outer_radius = outer_diameter / 2;

// Inner Diameter (mm)
inner_diameter = 8;
inner_radius = inner_diameter / 2;

// Sidewall Thickness (mm)
sidewall_thickness = 2;

// Height (mm)
height = 12;

// Split Bearing?
split_bearing = "Yes";  // [Yes,No]

/* [Hidden] */
resolution = 200;
fudge = .1;

module half_bearing() {
	rotate([0,0,-15])
	difference() {
		cylinder(r = outer_radius, h = height, $fn = resolution);

		translate([0,0,-fudge])
		cylinder(r = inner_radius, h = height + fudge * 2, $fn = resolution);

		for (r = [-90, -60, -30, 0, 30, 60, 90])
			rotate([0,0,r])
			translate([0,0,height/2 - fudge])
			cube([inner_radius/4,outer_radius * 2 - sidewall_thickness,height + fudge * 4], center = true);

		rotate([0,0,15])
		translate([0,-outer_radius * 1.1,-fudge])
		cube([outer_radius,outer_radius * 2.2,height + fudge * 4]);
	}
}

if (split_bearing == "Yes") {
	translate([-1,0,0])
	half_bearing();
	translate([1,0,0])
	rotate([0,0,180])
	half_bearing();
} else {
	half_bearing();
	rotate([0,0,180])
	half_bearing();
}

```


[User]
Okay, I'm working on a project that involves connecting LED strips, specifically the IKEA LEDBERG ones, using wires. I've got a basic design in mind, but I'd like an OpenSCAD file that's much more parametric and robust.

Currently, I have a male and female connector design. The male connector is essentially a box with two recessed channels for the wires, and the female connector is a box with a cavity sized for the male connector and corresponding channels for the wires to make contact. Both the male and female sockets have some minor offsets to ensure a good fit.

Here's what I need for the parametric design:

**General Requirements:**

*   **Parametric:** I need to be able to adjust all key dimensions via variables, making the design flexible for different LED strips or wire gauges.
*   **Wire Channels:** The design should have two wire channels for each connector, positioned to make contact with each other.
*   **Extrusion Offset:**  Include a parameter for extrusion offset to compensate for printing inaccuracies. This should add to the female size and subtract from the male size.
*   **Solid Core Wire Focus:** While it should work with twisted multi-filament wire, the design should prioritize solid core wire contact and reliability. The current design includes small locks at the ends of the contact channels; we should preserve that approach.

**Specific Parameters:**

*   **`male_x`, `male_y`, `male_z`**: Dimensions of the base male connector.
*   **`wall_thickness`**: Thickness of the outer walls of the connectors.
*   **`female_y`**: The length of the female connector.
*    **`female_z_extra`**: Extra height of the female connector to house electronics.
*    **`male_z_extra`**: Extra height of the male connector to house electronics.
*    **`diff_offset`**: A minor offset for proper fitting, like .01 or .005
*    **`contact_channel_x`**, **`contact_channel_y`**, **`contact_channel_z`**: Dimensions of the wire contact channels.
*    **`contact_channel_recess_male`**: How far the contact channel is recessed in the male connector.
*    **`contact_channel_recess_female`**: How far the contact channel is recessed in the female connector.
*   **`contact_channel_separation`**:  Distance between the centers of the two contact channels.
*   **`extrusion_offset`**: An offset to account for printing inaccuracies. This should add to the female size and subtract from the male size.
*   **`end_lock_z`**: The height of the little locks at the ends of the contact channels.
*  **`end_lock_z_offset`**: The vertical offset of those locks from the top of the contact channel.
*  **`end_lock_y_offset`**: The horizontal offset of those locks from the end of the contact channel.

**Modules:**

*   I need a `contact_channel` module that creates the channels with the little locks at the end, taking parameters like x, y, z, recess, and lock offsets.
*   A `female()` module that produces the female socket.
*   A `male()` module that produces the male socket.

**Additional Considerations:**

*   I'd like to be able to position them with rotation on the x axis, as my existing design does.
*   Please make sure the male connector has proper clearance to fit inside the female connector, taking into account the `extrusion_offset`.
*   The little locks at the ends of the contact channels should be generated by the contact_channel module.
*   The `diff_offset` should be used appropriately, such as adding it to the female connector's inner cavity.

I'd prefer the design to be as clean and easy to read as possible. Please avoid unnecessary transformations, and make sure the code is well-commented so I can understand each step. I am fine with using helper functions and/or `let` bindings to make the code more readable.

I'm not using any libraries at the moment, so we should keep it vanilla OpenSCAD. I would rather the contact channel module take the complete set of offsets to control the end locks.

[Assistant]
led_bar_sockets.scad:
```
// Male and female sockets for Ikea LEDBERG LED strips.  These are designed to
// be filled with 22 gauge solid core wire (or similar).  Multi-filament wire
// also works if you twist it. It'll work even better if you tin it. All units
// are in mm.

// Size of male connector. This is the base connector size.
male_x=7;
male_y=10;
male_z=4.3;

// thickness of the outer wall.
wall_thickness=1.5;

// size of female housing.
female_y=20;

// extra height above connector for electronics
female_z_extra=2;
male_z_extra=1;

// The amount of minor offset to make differences work correctly.
diff_offset=.01;

// contact channel width
contact_channel_x=1.5;
contact_channel_y=40;
contact_channel_z=1.5;

// how much of a lip to give the contact channel at the end of the socket
contact_channel_recess_male=1;
// No lip on the female, as it could potentially make the bar get stuck.
contact_channel_recess_female=0;

// The distance between the centers of the two contacts.
contact_channel_separation=3;

// How much extra to add to account for extrusion inaccuracies. This makes the male smaller and the female larger. 0.1 works well on a Lulzbot 0.5mm nozzle, 3mm filament.
extrusion_offset=0.1;

male_contact_z=male_z-contact_channel_z-wall_thickness+diff_offset-extrusion_offset*2;

module contact_channel(x,y,z,recess,end_lock_z,end_lock_z_offset,end_lock_y_offset){
        // one contact left
        translate([(wall_thickness + x/2)-contact_channel_separation/2-contact_channel_x/2,recess,z+wall_thickness]){
            cube([contact_channel_x,contact_channel_y,contact_channel_z]);
	    translate([0,end_lock_y_offset,end_lock_z_offset-wall_thickness]){
		cube([contact_channel_x,contact_channel_x,end_lock_z]);
	    }
        }
        // right contact
        translate([(wall_thickness + x/2)+contact_channel_separation/2-contact_channel_x/2,recess,z+wall_thickness]){
            cube([contact_channel_x,contact_channel_y,contact_channel_z]);
	    translate([0,end_lock_y_offset,end_lock_z_offset-wall_thickness]){
		cube([contact_channel_x,contact_channel_x,end_lock_z]);
	    }
        }
}

module female() {
    difference() {
	// Outer casing
        cube([male_x+wall_thickness*2+extrusion_offset*2,
                female_y,
                male_z+wall_thickness*2 + female_z_extra+extrusion_offset*2]);

	// Socket hole
        translate([wall_thickness,-diff_offset,wall_thickness]){
            cube([male_x + extrusion_offset*2,male_y+diff_offset,male_z + extrusion_offset*2]);
        }
	contact_channel(male_x +extrusion_offset*2,male_y,male_z+ extrusion_offset*2,contact_channel_recess_female,male_z + wall_thickness*2+female_z_extra+extrusion_offset*2,0,wall_thickness);
    }
}

module male(){
    difference(){
        union(){
            translate([wall_thickness,0,0]){
                cube([male_x - extrusion_offset*2, male_y, male_z - extrusion_offset*2]);
            }
            translate([-extrusion_offset*2,male_y,-extrusion_offset*2]){
                cube([male_x+wall_thickness*2 + extrusion_offset*2, male_y, male_z+wall_thickness+male_z_extra+extrusion_offset*2]);
            }
        }
    contact_channel(male_x-extrusion_offset*2,male_y, male_contact_z, contact_channel_recess_male, male_z, -male_contact_z,0);
    }
}

rotation=-90;

// Rotating them -90 degrees made the prints come out the best.
rotate([rotation,0,0]){
    female();
}

translate([15,0,0]){
    rotate([rotation,0,0]){
	male();
    }
}

```


[User]
Okay, I need an OpenSCAD design for a customizable box with a lid. Here's what I'm looking for:

**Core Functionality:**

*   **Box and Lid:** The design should include both a box and a lid. I need to be able to choose whether to generate just the box, just the lid, both separately, or an assembled view.
*   **Screw Fastening:** I'd like the option to have screw holes for fastening the lid to the box. If I choose to use screws, there should be four screw holes, one at each corner. The screw holes should be sized appropriately, including a countersink on the lid. If I choose not to use screws, the model should be without them.
*   **Customizable Dimensions:**
    *   I need to be able to specify the internal dimensions of the box, that is the dimensions of the space inside the box. This should be specified as `contentXSize`, `contentYSize`, and `contentZSize`.
    *   The walls should have a thickness, called `wallThickness`.
    *   There should be a rim on the box for the lid to sit on, with a `rimHeight` and a `rimThickness`. The rim thickness should never be larger than the wall thickness.
    *   I need a small tolerance for the internal size, called `tolerance`. This tolerance should be added to the box and lid size.

**Detailed Parameters:**

*   **`part`:** A dropdown list that lets me select which part to print: "Box only", "Lid Only", "Box and Lid" (prints both separated), or "Assembled box" (shows the box and lid assembled in a single view).
*  **`contentXSize`**, **`contentYSize`**, **`contentZSize`**: The internal dimensions of the box.
*   **`useScrew`**: A dropdown list, either "Yes" or "No", to enable or disable screw holes.
*   **`screwSize`**: The diameter of the screw hole in the box.
*   **`lidScrewHoleSize`**: The diameter of the screw hole in the lid.
*   **`screwHeadWidth`**: The width (diameter) of the screw head. This affects the counter bore size on the lid.
*  **`screwHeadHeight`**: The height of the screw head. This affects the lid thickness and the counter bore depth.
*   **`wallThickness`**: The thickness of all walls, except for the rim.
*   **`rimHeight`**: The height of the rim.
*   **`rimThickness`**: The thickness of the rim. It should be no larger than the wall thickness.
*   **`useThinLid`**: A boolean dropdown ("Yes" or "No"), if "Yes" then a large amount of material is cut out from the lid (for faster print times).
*   **`tolerance`**: A general tolerance value applied to the box and lid dimensions,
*   **`showContentPlaceholder`**: A checkbox to show a placeholder (in pink) cube representing the contents of the box, to help visualize the internal size. It should default to off.

**Implementation Details:**

*   I need to be able to change all of the parameters using the customizer.
*   I'd like comments in the code so that it is understandable and changeable in the future.
*   The code should be well-formatted and easy to follow.
*   Please include an approximation of a calculation of the additional size needed when screw heads are involved.
*   I'd like to use `$fs=0.3` for increased render quality.

**Libraries:**

*   I don't need any external libraries, like MCAD or BOSL, for this design. It should be done using just core OpenSCAD functions.

Can you provide me with the OpenSCAD code for this design?

[Assistant]
box.scad:
```
/* [Global] */

// Part to print
part = "both"; // [first:Box only,second:Lid Only,both:Box and Lid, assembly:Assembled box]

/* [Content] */

// Size of the content in x
contentXSize = 66.0;

// Size of the content in y
contentYSize = 52.0;

// Size of the content in z
contentZSize = 19.4;

/* [Screw] */

// Use screws to secure the lid
useScrew = "first"; // [first:Yes,second:No]

// Size of the screw hole in the box
screwSize = 1.5;

// Size of the screw hole in the lid
lidScrewHoleSize = 2;

// Width of the screw head
screwHeadWidth = 3;

// Height of the screw head
screwHeadHeight = 2.6;

/* [Walls] */

// Thickness of all walls except the rim
wallThickness = 3.2;

// Height of the rim
rimHeight = 3.0;

// Thickness of the rim, should be <= wallThickness
rimThickness = wallThickness;

// Cut out the lid to print faster and save material
useThinLid = "first"; // [first:Yes,second:No]

/* [Other] */

// Tolerance for the size in x and y
tolerance = 0.5;

// Show content placeholder in pink
showContentPlaceholder = false;

/* [Hidden] */

epsilon = 0.1;

module print_part()
{
	if (part == "first")
		box();
	else if (part == "second")
		lid();
	else if (part == "both")
		both();
	else if (part == "assembly")
		assembly();
	else
		both();
}

print_part();

// The actual geometry

// Additional size needed but difficult to calculate, this is only an approximation
additionalScrewCubeSize = screwHeadHeight + screwHeadWidth;

useScrewBool = useScrew == "first" ? true : false;
useThinLidBool = useThinLid == "first" ? true : false;

screwCubeSize = useScrewBool ? screwSize + 2 * wallThickness + additionalScrewCubeSize : 0;

xSize = contentXSize + 2 * wallThickness + 2 * screwCubeSize + tolerance;
ySize = contentYSize + 2 * wallThickness + tolerance;
zSize = contentZSize + tolerance;

tx0 = wallThickness;
tx1 = wallThickness + screwCubeSize / 2;
tx2 = xSize - screwCubeSize / 2 -wallThickness;
tx3 = xSize - screwCubeSize - wallThickness;
ty0 = wallThickness;
ty1 = wallThickness + screwCubeSize / 2;
ty2 = ySize - screwCubeSize / 2 - wallThickness;
ty3 = ySize - screwCubeSize - wallThickness;
tz0 = wallThickness;
tz1 = wallThickness + epsilon;
holeheight = wallThickness + rimHeight + 2 * epsilon;

$fs=0.3;

module screwbox(x0, y0, x1, y1)
{
	difference()
	{
		translate([x0, y0, tz0]) cube([screwCubeSize, screwCubeSize, zSize]);
		translate([x1, y1, tz1]) cylinder(r = screwSize, h = zSize + epsilon);
	}
}

module box()
{
	// Base box
	translate([0, 0, 0]) cube([xSize, ySize, wallThickness]);
	translate([wallThickness, 0, wallThickness]) cube([xSize - 2 * wallThickness, wallThickness, zSize]);
	translate([wallThickness, ySize - wallThickness, wallThickness]) cube([xSize - 2 * wallThickness, wallThickness, zSize]);
	translate([0, 0, wallThickness]) cube([wallThickness, ySize, zSize]);
	translate([xSize - wallThickness, 0, wallThickness]) cube([wallThickness, ySize, zSize]);

	// Rim
	translate([0, 0, zSize + wallThickness]) cube([xSize, rimThickness, rimHeight]);
	translate([0, ySize - rimThickness, zSize + wallThickness]) cube([xSize, rimThickness, rimHeight]);
	translate([0, rimThickness, zSize + wallThickness]) cube([rimThickness, ySize - 2 * rimThickness, rimHeight]);
	translate([xSize - rimThickness, rimThickness, zSize + wallThickness]) cube([rimThickness, ySize - 2 * rimThickness, rimHeight]);

	// Screw boxes
	screwbox(tx0, ty0, tx1, ty1);
	screwbox(tx0, ty3, tx1, ty2);
	screwbox(tx3, ty0, tx2, ty1);
	screwbox(tx3, ty3, tx2, ty2);

    // Content placeholder
	if (showContentPlaceholder)
    	translate([wallThickness + screwCubeSize, wallThickness, wallThickness]) color("red") cube([contentXSize, contentYSize, contentZSize]);
}

module lidScrewHole(x, y)
{
	translate([x, y, -epsilon]) cylinder(r = lidScrewHoleSize, h = holeheight + screwHeadHeight + epsilon);
	translate([x, y, screwHeadHeight -epsilon]) cylinder(r1 = screwHeadWidth, r2 = lidScrewHoleSize, h = screwHeadHeight + epsilon);
	translate([x, y, -epsilon]) cylinder(r = screwHeadWidth, h = screwHeadHeight + epsilon);
}

module lid()
{
    lidThickness = screwHeadHeight * 3 / 2;
	difference()
	{
		union()
		{
			translate([0, 0, 0]) cube([xSize, ySize, lidThickness]);
			translate([rimThickness, rimThickness, screwHeadHeight * 3 / 2]) cube([xSize- 2 * rimThickness, ySize - 2 * rimThickness, rimHeight]);
		}

        if (useScrewBool)
        {
            lidScrewHole(tx1, ty1);
            lidScrewHole(tx1, ty2);
            lidScrewHole(tx2, ty1);
            lidScrewHole(tx2, ty2);

            if (useThinLidBool)
            {
                offset = wallThickness + screwCubeSize;
                translate([offset, wallThickness + rimThickness, lidThickness - epsilon]) cube([xSize - 2 * offset, ySize - 2 * (wallThickness + rimThickness), rimHeight + 2 * epsilon]);
                translate([wallThickness + rimThickness, offset, lidThickness - epsilon]) cube([xSize - 4 * wallThickness, ySize - 2 * offset, rimHeight + 2 * epsilon]);
            }
        }
        else if (useThinLidBool)
        {
            translate([wallThickness + rimThickness, wallThickness + rimThickness, lidThickness - epsilon]) cube([xSize - 2 * (wallThickness + rimThickness), ySize - 2 * (wallThickness + rimThickness), rimHeight + 2 * epsilon]);
        }
	}
}

module both()
{
	box();
	translate([0, ySize + 10, 0]) lid();
}

module assembly()
{
	box();
	color("red") translate([0, 0, zSize + 2 * wallThickness + rimHeight + 2 * epsilon]) mirror ([0, 0, 1]) lid();
}

```


[User]
Okay, I have this OpenSCAD file for a birthday candle holder, and I'd like to make it more flexible and customizable, and also a bit more refined. The current design is a basic flower shape with three petals around a cylinder that holds a birthday candle. I want to be able to easily adjust the following things:

1.  **Number of petals:** Instead of always having three petals, I'd like to be able to choose how many petals the flower has.

2.  **Petal shape:** Currently the petals are cylindrical. I'd like to have the option to change the petal shape to something like a rounded petal or even a pointed petal, perhaps by adjusting a few parameters.

3. **Petal profile:** Instead of petals that are a straight cylinder with a 45 degree cut, I would like to be able to add a curve to the profile of the petals. This curve could be defined by a few parameters.

4.  **Candle hole:** The hole for the candle should be adjustable to fit different candle diameters, and also how deep it is.

5.  **Overall size:** I want to control both the overall diameter of the candle holder and the height of the base.

6.  **Base shape:** The base is currently a simple cylinder. I'd like an option to add a slight flare or curve to the base so it's not just a straight cylinder. Perhaps an elliptical base instead of cylindrical.

7.  **Bowl depth and shape:** The current bowl is a simple shallow sphere. I want to be able to easily adjust the depth and curvature of that bowl.

8. **Wall thickness:**  I need to be able to change the wall thickness of the petals and the base.

9.  **No hard coded angles:** The 45-degree angle on the petal needs to be more flexible so it can be adjusted. I would also like to make sure that the current design's "magic numbers" are replaced with named variables to increase readability.

10. **Include comments and documentation:** The generated code should have lots of comments explaining what each section does and how the parameters work.

11. **No libraries:** I'd like to stick with standard OpenSCAD features if possible. I'd prefer not to rely on any external libraries like MCAD or BOSL this time, for simplicity.

I want a parametric design that's flexible enough to create a variety of candle holder styles. Could you generate the OpenSCAD code for this, keeping those requirements in mind? I think the core structure of the current design is good, but it just needs more flexibility.

[Assistant]
Birthday_candle_holder.scad:
```
// Birthday candle holder by teejaydub

// preview[view:north, tilt:top]
/* [Global] */

// The diameter of the birthday candle [mm]
CANDLE_DIAMETER = 5.8;  //first try: 5.3, too small; 5.5 - 5.7, works but tight

// The outer diameter of the candle holder [mm]
OUTER_DIAMETER = 15;

/* [Hidden] */

CANDLE_RADIUS = CANDLE_DIAMETER / 2;
OUTER_RADIUS = OUTER_DIAMETER / 2;

HOLE_HEIGHT = CANDLE_RADIUS * 5;  // of the cutting hole object
CANDLE_HEIGHT = CANDLE_RADIUS;  // height of the candle above the floor
CANDLE_DEPTH = CANDLE_RADIUS * 1;  // how much the candle is buried in the holder

BASE_HEIGHT = CANDLE_HEIGHT + CANDLE_DEPTH;  // of the base object
BASE_RADIUS = CANDLE_RADIUS * 1.8;

PETAL_RADIUS = BASE_RADIUS / 1.7;

BOWL_RADIUS = OUTER_DIAMETER;

difference() {
	intersection() {
		union() {
			// Base
			translate([0, 0, BASE_HEIGHT / 2])
				cylinder(h = BASE_HEIGHT, r = BASE_RADIUS, center = true, $fn=35);

			// Flowers
			intersection() {
				union() {
					petal(0);
					petal(120);
					petal(240);
				}

				// Enforce a 45-degree angle on the petals so no support is needed.
				translate([0, 0, 50])
					cylinder(h = 100, r1 = 0, r2 = 100, center = true);
			}
		}

		// We want a circular outline.
		cylinder(h = 100, r = OUTER_RADIUS, center = true);
	}

	// Hole for the candle
	translate([0, 0, CANDLE_HEIGHT + HOLE_HEIGHT / 2])
		cylinder(h = HOLE_HEIGHT, r = CANDLE_RADIUS, center = true, $fn=15);

	// Shallow bowl
	translate([0, 0, BOWL_RADIUS + BASE_HEIGHT + 0.3])
		sphere(r = BOWL_RADIUS, center = true);
}

module petal(angle) {
	translate([0, 0, BASE_HEIGHT + PETAL_RADIUS * 0.7 - 1])
	rotate([0, 90, angle])
		cylinder(h = OUTER_DIAMETER, r = PETAL_RADIUS, center = true);
}
```