[User]
I'm looking to generate a customizable fan grill in OpenSCAD. I want the grill to have a frame with screw holes and rounded corners, and a central grill pattern.

Here are the specifics I'm envisioning:

*   **Overall Dimensions:** I need to be able to control the edge length of the frame, as well as the thickness.
*   **Frame:**
    *   The frame should have a circular cutout in the center for the grill.
    *   It needs screw holes near each corner and I need to specify the distance from the edge and the screw hole diameter,
    *   It would be nice to have an option to round the corners, using the screw hole distance as the radius.
*   **Grill:**
    *   The grill should be a separate piece and its thickness should be controllable.
    *   The grill will fit inside the circular cutout in the frame.
    *   I want to be able to select from different grill patterns like grid, honeycomb, triangle and stripes
    *   I need to be able to control the angle of the pattern, the number of elements in a row and the spacing between them,
*   **Parameters:** I need to be able to control all of these values via parameters.
*   **Output:** I want it to generate an STL file when I render it.

Could you provide me with the necessary OpenSCAD code? Please don't assume I have any additional libraries, so please do not use any of them.

[Assistant]
fan_grill.scad:
```
/******************************************************************************
 *
 *  GLOBALS
 *
 ******************************************************************************/

thickness = 2;
edgeLength = 40;
// If enabled, screw holes distance will be used as rouding radius.
roundCorners = 1; // [0: No, 1: Yes]
// Distance from edge to screw hole center
screwHolesDistance = 4;
screwHolesDiameter = 3;
grillThickness = 1.2;
grillHoleDiameter = 36;
grillPattern = 2; // [1: Grid, 2: Honeycomb, 3: Triangle, 4: Stripe]
patternAngle = 0; // [0:15:90]
// Used differently for varius patterns, just experiment with it
grillPatternElementsInRow = 6;
// Used differently for varius patterns, just experiment with it
grillPatternElementsDistance = 1;
/* [Hidden] */
$fa = 1;
$fs = 0.5;

/******************************************************************************
 *
 *  EXECUTION
 *
 ******************************************************************************/

frame();
grill();

/***************************************************************************
 *
 *  DIRECT MODULES
 *
 ******************************************************************************/

module frame()
{
    linear_extrude(thickness)
        _framePlane();
}

module grill()
{
    grillTranslation = grillHoleDiameter / 2 + (edgeLength - grillHoleDiameter) / 2;
    translate([grillTranslation, grillTranslation, 0])
        linear_extrude(grillThickness)
            _grillPlane();
}

/******************************************************************************
 *
 *  HELPER AND COMPONENT MODULES
 *
 ******************************************************************************/

module _framePlane()
{
    difference()
    {
        square(edgeLength);
        translate([edgeLength / 2, edgeLength / 2, 0])
        {
            circle(r = grillHoleDiameter / 2);
            _screwHolesPlane();
            _roundingsPlane();
        }
    }
}

module _screwHolesPlane()
{
    __multiply()
        _screwHolePlane();
}

module _screwHolePlane()
{
    circle(d = screwHolesDiameter);
}

module _roundingsPlane()
{
    if(roundCorners == 1)
    {
        __multiply()
            _roundingPlane();
    }
}

module _roundingPlane()
{
    rotate([0, 0, -45])
    difference()
    {
        square(screwHolesDistance);
            circle(r = screwHolesDistance);
    }
}

module __multiply()
{
    for(i = [45 : 90 : 405])
    {
        rotate([0, 0, i])
            translate([((edgeLength - 2 * screwHolesDistance)) * sqrt(2) / 2, 0, 0]) // yeah, this could be done easier :D
                children();
    }
}

module _grillPlane()
{
    intersection()
    {
        circle(d = grillHoleDiameter);

        rotate([0, 0, patternAngle])
            _grillPatternPlane();
    }
}

module _grillPatternPlane()
{
    translate([-grillHoleDiameter / 2, -grillHoleDiameter / 2, 0])
        difference()
        {
            square(grillHoleDiameter);

            if(grillPattern == 1)
            {
                _gridPatternPlane();
            }
            else if(grillPattern == 2)
            {
                _honeycombPatternPlane();
            }
            else if(grillPattern == 3)
            {
                _trianglePatternPlane();
            }
            else
            {
                _stripesPatternPlane();
            }
        }
}

module _gridPatternPlane()
{
    squareDimension = grillHoleDiameter / grillPatternElementsInRow - grillPatternElementsDistance;

    translate([grillPatternElementsDistance / 2, grillPatternElementsDistance / 2, 0])
        for(i = [0 : grillPatternElementsInRow - 1])
        {
            for(j = [0 : grillPatternElementsInRow - 1])
            {
                translate([(squareDimension + grillPatternElementsDistance) * i , (squareDimension + grillPatternElementsDistance) * j, 0])
                square(squareDimension);
            }
        }
}

module _honeycombPatternPlane()
{
    circleDimension = grillHoleDiameter / grillPatternElementsInRow - grillPatternElementsDistance;
    XTranslation = (circleDimension * 0.75 + grillPatternElementsDistance * sqrt(3) / 2);
    YTranslation = (circleDimension / 2 * sqrt(3) + grillPatternElementsDistance);

    translate([grillPatternElementsDistance / 2, grillPatternElementsDistance / 2, 0])
    for(i = [0 : grillPatternElementsInRow * 2])
    {
        for(j = [0 : grillPatternElementsInRow * 2])
        {
                translate([XTranslation * i, YTranslation * (j + 0.5 * (i % 2)), 0])
                    circle(d = circleDimension, $fn = 6);
        }
    }

}

module _trianglePatternPlane()
{
    difference()
    {
        square(grillHoleDiameter);
        translate([grillHoleDiameter / 2, grillHoleDiameter / 2, 0])
            for(i = [0 : 2])
            {
                rotate([0, 0, 60 * i])
                    translate([-grillHoleDiameter, -grillHoleDiameter, 0])
                        for(j = [0 : grillPatternElementsInRow * 2])
                        {
                            translate([(grillHoleDiameter / grillPatternElementsInRow) * j - grillPatternElementsDistance / 2, 0, 0])
                                square([grillPatternElementsDistance,grillHoleDiameter * 2]);
                        }
            }
    }
}

module _stripesPatternPlane()
{
    translate([grillPatternElementsDistance/2, 0, 0])
    for(i = [0 : grillPatternElementsInRow])
    {
        translate([grillHoleDiameter / grillPatternElementsInRow * i, 0, 0])
            square([grillHoleDiameter / grillPatternElementsInRow - grillPatternElementsDistance, grillHoleDiameter]);
    }
}
```


[User]
I'd like to create a parametric temperature tower for 3D printing in OpenSCAD. The basic idea is that it has multiple blocks, each printed at a different temperature, with a bridge connecting the towers. I have some specific requirements and parameters I'd like to be able to adjust.

First, the overall geometry should include:

*   A base plate to start things off. I need to define its length, width, and height.
*   A pedestal underneath each tower block to elevate it from the base. I need to control its dimensions separately.
*   The tower blocks themselves should also have adjustable dimensions.
*   There should be two towers per "layer" of temperature adjustment. They need to be offset from the center.
*   There should be an overhang extending from the outside edges of each tower, the size of which should be adjustable per tower. The overhangs also need to have a height above the tower and height below the tower that are controllable parameters.
*   A bridge should connect the two towers together. I need to be able to adjust its width and height. I need to be able to control the gap between the tower and the bridge on both sides. Additionally, I want the bridge's position relative to the block to be controlled as well.
*   Finally, each tower block needs to have text embossed into it to show what temperature it was printed at. This text should use a specific font, size (relative to the block), and depth.

Secondly, in terms of the temperature control, I need to be able to:

*   Set the initial temperature of the first block.
*   Set the final temperature of the last block.
*   Set the change in temperature between successive blocks.
*   Alternatively, set the number of blocks, if that's easier.

Essentially, I want to be able to define the dimensions and temperatures and have OpenSCAD generate the tower for me. I don't need any external libraries. Please provide me with all the necessary SCAD files to accomplish this. I'd prefer well commented code.

[Assistant]
Tower.scad:
```
X=+0; Y=+1; Z=+2;

/* [General] */
// temperature of the first block
initial_temperature = 280;
// final temperature
final_temperature = 210;
// change in temperature between successively printed blocks
temperature_step = -5;
// number of blocks - used if non-zero, overrides final_temperature
number_of_blocks = 0;

/* [Detail Geometry] */
// dimensions of the base plate
base = [46, 14, 1.5];
// dimensions of the pedestal under a tower block
pedestal = [6, 6, 1];
// dimensions of the tower block
block = [8, 8, 6];
// X spacing between the towers
tower_x_distance = 16*2;
// left (X-) overhang size
overhang_l_x = 3;
// right (X+) overhang size
overhang_r_x = 5;
// top of the overhang relative to the top of the block
overhang_z_top = -2.394;
// height of the overhang
overhang_z = 3;
// gap between the bridge and the left (X-) tower
bridge_l_gap = 1;
// gap between the bridge and the right (X+) tower
bridge_r_gap = 3;
bridge_y_front = -block[Y]/2;
bridge_y = block[Y]/2;
// top of the bridge relative to the top of the block
bridge_z_top = -0.394;
// thickness of the bridge
bridge_z = 1.5;
// embossing depth of the text
text_depth = 1;
// font used for the text
text_font = "Helvetica:style=Bold";
// text ascent relative to the width of the tower block
text_ascent = 0.4;

/* Hidden */

module Tower(x, overhang, gap, temp)
    translate([x,0,0])
    scale([x<=0 ? 1 : -1, 1, 1])
{
    z1 = 0;
    translate([0,0,z1 + pedestal[Z]/2]) cube(pedestal, true);
    z2 = z1 + pedestal[Z];
    temp = temp ? str(temp) : "";
    difference() {
        translate([0,0,z2 + block[Z]/2]) cube(block, true);
        translate([0, -block[Y]/2+text_depth-0.001, z2 + block[Z]/2])
        rotate([90,0,0])
        linear_extrude(text_depth)
        text(temp, size = block[X] * text_ascent,
             valign = "center", halign = "center",
             font = text_font);
    }

    z3 = z2 + block[Z];

    overhang_pts = [[0,0],[0,-overhang_z],[overhang,0]];

    z4 = z3 + overhang_z_top;
    translate([block[X]/2, block[Y]/2, z4])
        rotate([90,0,0])
        linear_extrude(block[Y])
        polygon(points=overhang_pts);

    pedestal_z = abs(overhang_z_top -bridge_z_top + bridge_z);
    translate([block[X]/2 + gap, bridge_y_front, z4]) {
        cube([(overhang-gap), bridge_y, pedestal_z]);
        translate([0,0,pedestal_z])
            cube([abs(x)-block[X]/2-gap, bridge_y, bridge_z]);
    }

}

z1 = 0;
translate([0,0,z1+base[Z]/2]) cube(base, true);
z2 = z1 + base[Z];

count = number_of_blocks>0 ? number_of_blocks :
    1+(final_temperature - initial_temperature)/temperature_step;

for (i = [0 : count-1]) {
    z3 = z2 + i*(pedestal[Z] + block[Z]);
    temp = initial_temperature + i*temperature_step;
    translate([0,0,z3]) {
        Tower(-tower_x_distance/2, overhang_l_x, bridge_l_gap, temp);
        Tower(tower_x_distance/2, overhang_r_x, bridge_r_gap);
    }
}

```


[User]
Hey, I'm looking to make a customizable keyfob using OpenSCAD. I'd like it to have a few key features:

1.  **Customizable Text:** The main feature should be a text area where I can type in a name or short word that will be extruded. I'd like to be able to pick from a few different fonts, maybe something like "Courgette", "Gloria Hallelujah", "Pacifico", "Permanent Marker", "Domine", "Ultra", and "Bevan".
2.  **Rounded Rectangle Base:** I want the base of the keyfob to be a rounded rectangle. Think of it like a pill shape with slightly rounded corners, that's extruded into a flat block. I need to be able to set the length, width, and height of this base.
3.  **Recessed Center:** I'd like to have the base be cut with a recessed area in the middle that goes almost, but not quite, all the way through to the bottom of the fob. This would make the area with the text stand out more.
4.  **Hole for Keyring:** Finally, I'll need a hole at one end of the keyfob for attaching a keyring. It should have a round shape with a smaller, solid cylinder inside it for the hole itself.

So, to recap, I want a parametric design where I can set the text, font, dimensions of the rounded rectangle base, and everything is configurable using OpenSCAD. Could you write the OpenSCAD code to do that? I don't need any external libraries, it should be pure OpenSCAD code.

[Assistant]
Name.scad:
```
name="Name";
// font name
font_name = "Courgette"; // [Gloria Hallelujah, Pacifico, Courgette, Permanent Marker, Domine:Domine bold, Ultra, Bevan]

// Manually set length to match name
length=50;
width=20;
height=10;

l=length; w=width; h=height;

translate([10,10,0])
linear_extrude(height)
text(name, font = font_name);

difference()
{
  face(l,w,h);
  translate([4,4,h/2]) face(l-8,w-8,h/2+1);
}

translate([-4,15,0]) difference()
{
  cylinder(h,6,6,0);
  cylinder(h+1,4,4,0);
}

module face(l, w, h)
{
    linear_extrude(h)
    translate([5,5,0])
    hull()
    {
      circle(5);
      translate([l,0,0]) circle(5);
      translate([0,w,0]) circle(5);
      translate([l,w,0]) circle(5);
    }
}
```


[User]
I need an OpenSCAD design for a filament spool adapter. I've got a center pin that's 20mm in diameter and a spool hole that's 53.7mm in diameter. The adapter should be 10mm thick, but I would like to be able to adjust that later if necessary.

I'm aiming for a snug fit on the spool but a loose fit on the center pin, so I'd like a clearance of about 1mm for the center hole and 0.2mm for the outer diameter. Also, I'd like some small holes around the adapter, so maybe put in 8 holes equally spaced. I'd also like the diameter of these holes to be adjustable and use a variable to control the number of small holes. Something like 40% of the difference between the inner and outer diameter might be a good starting point for the small holes diameter. Let's also make the distance of these small holes from the center parametric too, maybe halfway between the inner and outer diameters would work. I'd like to be able to control the exact dimensions and clearances via parameters.

Essentially, what I'm after is a parametric design, so I can use it for different spools by just changing the parameters. The output file should include a variable that represents the thickness, inner diameter, outer diameter, the number of small holes, and diameter of the small holes as well as the clearances for each of the diameters. And make sure that the small holes are cut out of the design. I'm assuming that this design can be created entirely in a single file. I do not want to import any libraries into this project, so please don't use any modules from any libraries like MCAD, BOSL, etc. I'd like to keep things as simple as possible.

[Assistant]
spooladapter.scad:
```
// Simple distance for filament spool
// holder
// Use about 1 mm clearance for center hole and 0.2 mm clearance for outer diameter.
// The idea is to have the adapter sit tightly on the spool but spin quite loosely on the center cylinder
// Number of holes can be tweaked if necessary

echo(version=version());

// Enter as exact dimensions as possible

centerPinDiameter = 20.0;
spoolHoleDiameter = 53.7;
thickness = 10; //[3:15]

// Default clearances and thickness
centerPinDiameterClearance = 1.0*1;
spoolHoleDiameterClearance = 0.2*1;

// Don't change these
holeDiameter = centerPinDiameter + centerPinDiameterClearance;
outerDiameter = spoolHoleDiameter - spoolHoleDiameterClearance;

// These should work fine for most too, consider changing smallHolesCount first if holes collide

smallHolesCount = 8; //[5:15]
smallHolesOffset = (holeDiameter + outerDiameter)/4;
smallHolesDiameter = (outerDiameter - holeDiameter)*0.40;

// These are used to make the small holes
module make_ring_of(radius, count)
{
    for (a = [0 : count - 1]) {
        angle = a * 360 / count;
        translate(radius * [sin(angle), -cos(angle), 0])
            rotate([0, 0, angle])
                children();
    }
}

module holes(offset, dia, cnt) {
    color("red")
    make_ring_of(radius = offset, count = cnt)
        cylinder(d = dia, h = thickness+1, center = false);
}

// Simply rotate a rectangle
module wall(hd, od) {
    color("red")
        rotate_extrude($fn = 80)
        translate([hd/2, 0, 0])
            square([(od-hd)/2, thickness]);
}

// Take the difference between a rotated rectangle and some inserted cylinders to get the shape
difference() {
    wall(holeDiameter,outerDiameter);
    holes(smallHolesOffset,
          smallHolesDiameter,
          smallHolesCount);
}

```


[User]
I'd like to create a customizable jar lid for things like spices or small parts, and I'm thinking of using OpenSCAD for it. I need it to be parametric so I can easily adjust it for different sized jars.

The lid will essentially be a cylinder with a smaller cylinder removed from the center to create a lip that sits inside the jar. I also need four small protruding cylinders, sort of like pegs, equally spaced around the inside circumference. Finally, there should be an option to add custom text engraved on the top of the lid.

Here are the specific details:

*   **Base:** The base will be a cylinder. I'll need parameters for both the outer radius and the inner radius, which creates the lip of the lid.
*   **Pegs:** Four small cylinders will protrude inwards from the base cylinder. These will act as 'grips' to help keep the lid on the jar. The parameter I'd like is the "C distance", which is the distance between two of the protruding pegs at opposite sides. The center of each peg should be half of this distance plus 7.5mm from the center of the lid. The pegs themselves will have a diameter and height as well.
*   **Text:** The text will be engraved onto the top of the lid. Parameters should allow me to define the content of the text, the font, and the font size. I'd also need to position the text on the lid's surface, so parameters to adjust x and y offsets would be useful.
*   **Thickness:** the overall thickness of the lid should be parameterized. I'd also like to have a separate parameter for the height of the pegs.

Could you help me create an OpenSCAD file that allows for these adjustments? I'm pretty new to this, so please keep that in mind. I’m not using any specific libraries, just the base OpenSCAD functionalities.

[Assistant]
CustomizableNameJarLid.scad:
```
$fn=150;

external_radius=28;
internal_radius=26.25;
half_c_distance_plus_seven_point_five=32.25;

content="THYME";
font="Arial";
font_size=8;

x=-18;
y=-4;

difference() {
    cylinder (r=external_radius,h=10);
    translate ([0,0,1])
    cylinder (r=internal_radius,h=10);
  rotate ([180,0,0])
  translate ([x,y,-0.4])
  linear_extrude(height=1)
    {text(content,font=font,size=font_size);}
    }
intersection() {
  cylinder (r=internal_radius,h=10);
    translate ([-half_c_distance_plus_seven_point_five,0,8.6])
    cylinder (d=15,h=1.4);}
intersection() {
  cylinder (r=internal_radius,h=10);
    translate ([half_c_distance_plus_seven_point_five,0,8.6])
    cylinder (d=15,h=1.4);}
intersection() {
  cylinder (r=internal_radius,h=10);
    translate ([0,-half_c_distance_plus_seven_point_five,8.6])
    cylinder (d=15,h=1.4);}
intersection() {
  cylinder (d=52.5,h=10);
     translate ([0,half_c_distance_plus_seven_point_five,8.6])
     cylinder (d=15,h=1.4);}
```


[User]
I'd like to design a parametric IC extractor for removing DIP chips from sockets. The goal is to create a tool that can be adjusted for different chip sizes. Here are the core features and dimensions I need to control:

1.  **Connection Circle Diameter (cd):** This is the diameter of the inner circle where the handles join.
2.  **Handle Width (w):** The thickness of the handles.
3.  **Handle Length (l):** The length of the handles.
4.  **Tip Length (tip):** How far the 'gripping' tips extend.
5.  **Tip Width (tipw):** The width of the gripping tips.
6.  **Twizer Thickness (h):** The overall thickness of the extractor.
7.  **Maximum Width Between Ends (max_w):** The distance between the inside of the gripping tips when the tool is closed - this is the critical dimension for different chip sizes.

I've been working on my own script to do this, but I need some more flexibility. Here's what I've come up with so far:

```scad
//connection circle diameter (диаметр внешнего круга)
cd=25;

//width of handles (толщина стенок)
w=4;

//length on handles (длина ручек)
l=80;

//tip length (длина губок)
tip=4;

//tip width (ширина губок)
tipw=3;

//twizers thick (толщина пинцета)
h=6;

//main size between ends (расстояние между концами без учета выступов)
max_w=28;

ang=asin(((max_w-cd)/2)/l);
echo (ang);
//ang=10;//угол разведения ручек

$fn=64;
module tip(){
    polygon([[l*cos(ang)+tipw,endp+tipw*sin(ang)],[l*cos(ang),endp-tip-w],[l*cos(ang),endp]]);
}

endp=(cd+l*sin(ang)*2)*0.5;//точка луча конечная
linear_extrude(h){
    difference(){
        hull(){
            circle(d=cd);
            translate([l*cos(ang)-0.01,-(cd+l*sin(ang)*2)*0.5])square([0.01,cd+l*sin(ang)*2]);
        }
        hull(){
            circle(d=cd-w*2);
            translate([l*cos(ang)-0.01,-(cd+l*sin(ang)*2)*0.5+w])square([0.01,cd+l*sin(ang)*2-w*2]);
        }

    }
    tip();
    mirror([0,1,0])tip();
}
```

The current code has some hardcoded values and I'd really prefer to have a fully parametric design I can easily adjust using the customizer. I'd also like to avoid needing to calculate the angle manually.  It'd be great if you could generate an OpenSCAD file for me that allows for all of those parameters to be easily adjusted, generating a functional model I can use to extract various sizes of DIP ICs.  I'm not particularly concerned about fancy rendering or other visual effects. Just something solid that I can print and use.

[Assistant]
ic_exctractor.scad:
```

//connection circle diameter (диаметр внешнего круга)
cd=25;

//width of handles (толщина стенок)
w=4;

//length on handles (длина ручек)
l=80;

//tip length (длина губок)
tip=4;

//tip width (ширина губок)
tipw=3;

//twizers thick (толщина пинцета)
h=6;

//main size between ends (расстояние между концами без учета выступов)
max_w=28;

ang=asin(((max_w-cd)/2)/l);
echo (ang);
//ang=10;//угол разведения ручек

$fn=64;
module tip(){
    polygon([[l*cos(ang)+tipw,endp+tipw*sin(ang)],[l*cos(ang),endp-tip-w],[l*cos(ang),endp]]);
}

endp=(cd+l*sin(ang)*2)*0.5;//точка луча конечная
linear_extrude(h){
    difference(){
        hull(){
            circle(d=cd);
            translate([l*cos(ang)-0.01,-(cd+l*sin(ang)*2)*0.5])square([0.01,cd+l*sin(ang)*2]);
        }
        hull(){
            circle(d=cd-w*2);
            translate([l*cos(ang)-0.01,-(cd+l*sin(ang)*2)*0.5+w])square([0.01,cd+l*sin(ang)*2-w*2]);
        }

    }
    tip();
    mirror([0,1,0])tip();
}

```


[User]
I'm looking to create a parametric bottle cap design in OpenSCAD, and I've got some specific ideas in mind. I'd like to be able to customize the cap's inner and outer diameters, the height of the cap itself (the mesh section), how far the lip extends into the hole, the thickness of the mesh lines, the size of the holes in the mesh, whether the lip is an inner or outer type, and the thickness of that lip. Oh, and I'd like a toggle to turn the mesh on or off. I'd also like to be able to define the resolution of the cylinder segments, too.

Specifically, I need:
*   `inner_diameter`: The inside diameter of the hole the cap fits into.
*   `outer_diameter`: The outer diameter of the cap's cylindrical part that extends around the hole.
*   `cap_height`: The height of the cap's main mesh section.
*   `lip_depth`: How deep the lip extends into (or over, depending on type) the hole.
*   `mesh_width`: The thickness of the grid lines in the mesh.
*   `gap_size`: The size of the square holes in the mesh grid.
*   `lip_type`: A string that is either "inner" or "outer" to control whether the lip goes inside the hole or wraps around the outside.
*   `lip_thickness`: The thickness of the lip itself.
*   `have_mesh`: A boolean to turn the mesh on or off.
*   `res`: An integer to control the cylinder segment resolution.

For an inner lip type, the cap should have a main cylinder that extends the `cap_height` + `lip_depth` down from the top, and then a cut cylinder that removes material to create the hole for the item and the lip going inward. For an outer lip type, the cap should have a main cylinder that has the outer diameter plus twice the `lip_thickness`, a cylinder that cuts away to create the hole and lip, and then any mesh.

The mesh should be a grid of square holes created by subtracting cubes from the cap cylinder. I think I need to use `intersection` to make the grid and cylinder line up. I also want the ability to rotate the whole design 180 degrees, just for presentation purposes.

Could you generate the necessary OpenSCAD file(s) to accomplish this? I'd also like it to not use any libraries.

[Assistant]
bottle_cap.scad:
```
//The inner diameter of the hole
inner_diameter = 21.15;
//The outer diameter of the hole's tube (a.k.a. the diameter of the pipe if you are capping a pipe - how far the top of the cap extends around the hole)
outer_diameter = 25.5;
//The height of the actual cap part - the mesh
cap_height = 1;
//How far into the hole the cap extends
lip_depth = 6;
//The thickness of the mesh lines
mesh_width=0.8;
//The size of the square holes in the mesh
gap_size=2;
//Whether the lip extends into the hole on the inside, or caps around it on the outside
lip_type="inner";// ["inner","outer"]
//The thickness of the lip
lip_thickness=2;
//Whether or not to have the mesh
have_mesh=true;

//Advanced: Cylinder segment resolution
res = 128;

rotate([180])
if(lip_type=="inner")
{
    difference(){
        translate([0,0,-lip_depth])
            cylinder(d=outer_diameter, h=cap_height+lip_depth, $fn=res);
        translate([0,0,-lip_depth-1])
            cylinder(d=inner_diameter-lip_thickness*2, h=lip_depth+1, $fn=res);
        if(have_mesh){
            CircularMesh(inner_diameter - lip_thickness*2);
        }
        difference(){
            translate([0,0,-lip_depth-1])
            cylinder(d=outer_diameter+1, h=lip_depth+1, $fn=res);
            translate([0,0,-lip_depth-2])
            cylinder(d=inner_diameter, h=lip_depth+2, $fn=res);
        }
    }
}else if(lip_type=="outer"){
    difference(){
        translate([0,0,-lip_depth])
        cylinder(d=outer_diameter+lip_thickness*2, h=cap_height+lip_depth, $fn=res);
        translate([0,0,-lip_depth-1])
        cylinder(d=outer_diameter, h=lip_depth+1, $fn=res);
        if(have_mesh){
            CircularMesh(inner_diameter);
        }
    }
}

module CircularMesh(diameter){
    translate([0,0,-1])
    intersection(){
    cylinder(d=diameter, h=cap_height+2, $fn=res);
        union(){
            for(i = [-inner_diameter/2-mesh_width:gap_size+mesh_width:inner_diameter/2+mesh_width])
            {
                for(o = [-inner_diameter/2-mesh_width:gap_size+mesh_width:inner_diameter/2+mesh_width])
                {
                    translate([i,o,0])
                    cube(size=[gap_size,gap_size, cap_height+2]);
                }
            }
        }
    }
}
```


[User]
Hey, I'm looking to create a customizable box generator in OpenSCAD. I want the box to be open-topped and defined by its external dimensions, wall thickness, and height. I'd like to be able to adjust all of these parameters easily.

Essentially, it's a simple rectangular box where I can specify the outside length, width, and height, as well as the thickness of the walls. The inside dimensions will naturally be smaller due to the wall thickness. It needs to be a straightforward design using `cube` and `difference`.

Could you generate the necessary OpenSCAD file(s) for this? I don't need any fancy features, just a clean, parametric design. The design I have so far is below.

```
L = 103;
W = 96;
H = 26.5;
T = 1.5;
difference() {
    cube([W,L,H],true);
    translate([0,0,(T)]) cube([(W-2*T),(L-2*T),(H)],true);
}
```

[Assistant]
LWHT-open-top-box.scad:
```
L = 103;
W = 96;
H = 26.5;
T = 1.5;
difference() {
    cube([W,L,H],true);
    translate([0,0,(T)]) cube([(W-2*T),(L-2*T),(H)],true);
}

```


[User]
I'm looking to create a parametric OpenSCAD design for a helical antenna, along with its frame and reflector. I have a fairly detailed spec already, and I'd like to be able to tweak all the parameters to customize it to my exact needs.

Here's what I have in mind:

**Core Antenna Parameters:**

*   **Polarization:** I need to be able to select either left-hand or right-hand circular polarization.
*   **Turns:** The number of turns for the helix should be adjustable.
*   **Inner Diameter:** The inner diameter of the helix needs to be a parameter.
*   **Wire Diameter:** The diameter of the antenna wire itself should be a variable.
*   **Height:** The overall height of the helix antenna should be adjustable.

**Reflector:**

*   **Shape:** I want to be able to choose between a square or a round reflector.
*   **Diameter/Width:** The diameter (for round) or width (for square) of the reflector needs to be a parameter, with separate parameters for the reflector itself and the outer supporting frame.
*   **Thickness:** I need to specify the thickness of the reflector material.
*   **Wall Thickness:** The thickness of the walls used in the reflector frame mounts should be a customizable parameter.
*   **Cover Wall Thickness:**  I also need to control the wall thickness for any cover parts of the reflector.
*   **Brim:**  I need a parameter for a brim that overlaps the reflector, both in width and height.
*   **Coaxial Diameter:** I need a variable for the outer diameter of the coaxial cable (without insulation, but including the shielding).
*   **Back Cover:** The height of the back cover, along with the width of the cover snaps should be adjustable.

**Tolerances & Resolution:**

*   **Cover Padding:** I need some padding parameter for the cover slits, for fitting top and bottom frame parts.
*   **Slit Padding:** I also need separate padding parameters for the slot parts (sides and top).
*   **Resolution:** The resolution of the helix curve generation (number of segments) should be adjustable.
*   **Wall Thickness:** I need to specify the general thickness of all walls in the frame parts.
*   **Support Thickness:** I need a parameter for the thickness of each support piece.

The design should include a winding template to aid in creating the helix. This template needs to change shape based on the polarization (left vs right). The frame should be built to accommodate the reflector PCB and also provide mounts for the reflector and an enclosure for everything with a cover for the reflector.

I'd like to be able to render different parts of the design separately, like the winding template, top/bottom support structures, reflector, and cover. Also, I'd like the option to render all parts or just the frame together.

I am not using any libraries right now, but I expect a fairly complex design, so you are welcome to use any that you think would be helpful, as long as you make a note which library it is using.

Could you generate the OpenSCAD code for this?

[Assistant]
helix.scad:
```
/* [General] */
// Which parts to render (CAUTION: rendering "all" parts tends to time out on thingiverse)
part = "all"; // [all: All, winding: Winding template, top: Top support structure, bottom: Bottom support structure, reflector: Reflector Base, cover: Cover, frame: All frame parts]
// Circular polarization
polarization = "right"; // [left: Left, right: Right]
// Turns of your antenna (value from calculator)
turns = 5; // [1:1:16]
// Inner Diameter of your antenna (value from calculator)
D = 17.5;
// Diameter of your antenna wire (value from calculator, but adjust for your printers tolerances)
d = 2;
// Height of your antenna (value from calculator)
L = 59.4;

/* [Reflector] */
// Shape of the reflector PCB
reflectorShape = "round"; // [square: Square, round: Round]
// Diameter or width of the Reflector (account for your printers tolerances here)
reflectorDiameter = 46.5;
// Thickness of the reflector PCB
reflectorThickness = 1.8;
// Thickness of the walls for the Reflector mounts (adjust to your liking - best a multiple of your nozzle diameter)
reflectorWalls = 2;
// Thickness of the walls of the Reflector cover (adjust to your liking - best a multiple of your nozzle diameter)
reflectorCoverWalls = 1.2;
// Brim over the reflector, how much the reflector material should be overlapped
reflectorCoverBrim = 1;
// Height of the Brim over the reflector (adjust to your linking, best a multiple of your layer height)
reflectorCoverBrimHeight = 0.6;
// Outer diameter of the coaxial cable, with shielding but without insulation  (account for your printers tolerances here)
coaxialDiameter = 4.5;
// Thickness of the reflector back cover (adjust to your linking, best a multiple of your layer height)
reflectorBackCoverHeight = 1;
// Width of the reflector back cover snaps (adjust to your liking - best a multiple of your nozzle diameter)
reflectorBackCoverSnapWidth  = 2;

/* [Tolerances] */
// Padding for the cover slits (tolearance for the top and bottom frame pieces to fit into the slits of the ring)
reflectorCoverPadding = 0.2;
// padding between the slot parts (sides)
slitPadding = 0.05;
// padding between the slot parts (joint)
slitPaddingTop = 0.2;
// Resolution of the helix (more will render longer, or timeout on thingiverse)
resolution = 64; // [1:1:256]
// Thickness of the walls (adjust to your liking - best a multiple of your nozzle diameter)
walls = 2;
// Thickness of each support piece (adjust to your liking - best a multiple of your layer height, thinner is better)
depth = 3;

/* [Hidden] */
$fn = 64;

direction = polarization;
enableReflectorMounts =  "enabled";

height = L;
innerDiameter = D;
conductorDiameter = d;
innerRadius = innerDiameter / 2;
conductorRadius = conductorDiameter / 2;
spacing = height / turns;

cutoutRadius = (spacing - (walls + conductorRadius) * 2) / 2;
cutoutY = cutoutRadius + depth / 2 + walls * 1.5;

topRadius = innerRadius + conductorRadius - cutoutRadius;
holeRadius = conductorRadius;

holeWrapperRadius = holeRadius + walls;
holeWrapperY = innerRadius + conductorRadius;
holeWrapperZ = conductorRadius + walls;
totalHeight = height + (conductorRadius + walls) * 2;

reflectorRadius = reflectorDiameter / 2;
reflectorDiameterOuter = reflectorDiameter + reflectorWalls * 2;

reflectorCoverHeight = reflectorWalls + reflectorThickness + reflectorCoverBrimHeight;
reflectorCoverDepth = depth + reflectorCoverPadding * 2;

coverWidth = reflectorDiameter + reflectorWalls * 2 + reflectorCoverWalls * 2;
reflectorWallOffset = reflectorCoverWalls + reflectorWalls;
reflectorBrimTotal = reflectorCoverBrim * 2;
widthCross = reflectorCoverPadding * 2 + reflectorDiameterOuter;
coverRadius = coverWidth / 2;

coaxialRadius = coaxialDiameter / 2;

reflectorBackCoverSnapHeight = reflectorWalls - reflectorCoverPadding;
reflectorBackCoverOuterRadius = coverRadius - reflectorCoverWalls - reflectorWalls - reflectorCoverPadding;
reflectorBackCoverOuterWidth = reflectorDiameter - reflectorCoverPadding * 2;

renderPart();

module renderPart() {
    if(part == "all") {
        spacing = 5;

        translate([0, 0, depth / 2])
            renderTop();

        translate([coverWidth+ spacing, 0, depth / 2])
            renderBottom();

        if(direction == "right") {
            translate([0, -coverWidth / 2 -  reflectorThickness - reflectorWalls -spacing, 0])
                template(cw = false);
        }
        else {
            translate([0, -coverWidth / 2 -  reflectorThickness - reflectorWalls -spacing, 0])
                template(cw = true);
        }

        if(reflectorShape == "square") {
            translate([-coverWidth / 2, -coverWidth -  reflectorThickness - reflectorWalls -spacing, 0])
                reflector();
        }

        if(reflectorShape == "round") {
            translate([-coverWidth / 2, -coverWidth -  reflectorThickness - reflectorWalls -spacing, 0])
                roundReflector();
        }

        if(reflectorShape == "square") {
            translate([coverWidth / 2 + spacing, -coverWidth -  reflectorThickness - reflectorWalls -spacing, 0])
                cover();
        }

        if(reflectorShape == "round") {
            translate([coverWidth / 2 + spacing, -coverWidth -  reflectorThickness - reflectorWalls -spacing, 0])
                coverRound();
        }
    }

    if(part == "frame") {
        spacing = 5;

        translate([0,0, depth / 2])
            renderTop();

        translate([coverWidth+ spacing, 0, depth / 2])
            renderBottom();

        if(reflectorShape == "square") {
            translate([-coverWidth / 2, -coverWidth -  reflectorThickness - reflectorWalls -spacing, 0])
                reflector();
        }

        if(reflectorShape == "round") {
            translate([-coverWidth / 2, -coverWidth -  reflectorThickness - reflectorWalls -spacing, 0])
                roundReflector();
        }

        if(reflectorShape == "square") {
            translate([coverWidth / 2 + spacing, -coverWidth -  reflectorThickness - reflectorWalls -spacing, 0])
                cover();
        }

        if(reflectorShape == "round") {
            translate([coverWidth / 2 + spacing, -coverWidth -  reflectorThickness - reflectorWalls -spacing, 0])
                coverRound();
        }
    }

    if(part == "winding") {
        if(direction == "right") {
            template(cw = false);
        }
        else {
            template(cw = true);
        }

    }

    if(part == "top") {
        renderTop();
    }

    if(part == "bottom") {
        renderBottom();
    }
    if(part == "reflector") {
        if(reflectorShape == "square") {
            reflector();
        }

        if(reflectorShape == "round") {
            roundReflector();
        }
    }

    if(part == "cover") {
        if(reflectorShape == "square") {
            cover();
        }

        if(reflectorShape == "round") {
            coverRound();
        }
    }
}

module roundReflector() {
    translate([coverRadius, coverRadius, 0]) {
        group() {
            difference() {
                cylinder(r = coverRadius, h = reflectorCoverHeight);

                translate([0, 0, reflectorCoverBrimHeight])
                    cylinder(r = reflectorRadius, h = reflectorCoverHeight);

                translate([0, 0, -1])
                    cylinder(r = reflectorRadius - reflectorCoverBrim, h = reflectorCoverHeight + 2);

                translate([-widthCross / 2, -reflectorCoverDepth / 2, -1])
                    cube([widthCross, reflectorCoverDepth, reflectorCoverHeight + 2]);

                translate([-reflectorCoverDepth / 2, 0, -1])
                    cube([reflectorCoverDepth, widthCross / 2, reflectorCoverHeight + 2]);
            }
        }
    }
}

module reflector() {
    difference() {
        cube([coverWidth, coverWidth, reflectorCoverHeight]);

        translate([reflectorWallOffset, reflectorWallOffset, reflectorCoverBrimHeight])
            cube([reflectorDiameter, reflectorDiameter, reflectorWallOffset + reflectorThickness + 2]);

        translate([reflectorWallOffset + 1, reflectorWallOffset + 1, -1])
            cube([reflectorDiameter - reflectorBrimTotal, reflectorDiameter - reflectorBrimTotal, reflectorWallOffset + reflectorThickness + 2]);

        group() {
            translate([reflectorCoverWalls - reflectorCoverPadding, coverWidth / 2 -reflectorCoverDepth / 2, -1])
                cube([widthCross, reflectorCoverDepth, reflectorCoverHeight + 2]);

            translate([coverWidth / 2 -reflectorCoverDepth / 2, reflectorCoverWalls - reflectorCoverPadding + widthCross / 2, -1])
                cube([reflectorCoverDepth, widthCross / 2, reflectorCoverHeight + 2]);
        }
    }
}

module cover() {
    difference() {
        group() {
            cube([coverWidth, coverWidth, reflectorBackCoverHeight]);

            translate([reflectorWallOffset + reflectorCoverPadding, reflectorWallOffset + reflectorCoverPadding , 0])
                cube([reflectorBackCoverOuterWidth, reflectorBackCoverOuterWidth, reflectorBackCoverHeight + reflectorBackCoverSnapHeight]);
        }
        translate([coverRadius, coverRadius - innerRadius, -1])
            cylinder(r = coaxialRadius, h = reflectorBackCoverHeight + 2);

        translate([reflectorWallOffset + reflectorCoverPadding +  reflectorBackCoverSnapWidth, reflectorWallOffset + reflectorCoverPadding +  reflectorBackCoverSnapWidth, reflectorBackCoverHeight])
                cube([reflectorBackCoverOuterWidth - reflectorBackCoverSnapWidth * 2, reflectorBackCoverOuterWidth - reflectorBackCoverSnapWidth * 2, reflectorBackCoverHeight + reflectorBackCoverSnapHeight]);

        group() {
            translate([reflectorCoverWalls - reflectorCoverPadding, coverWidth/2 -reflectorCoverDepth, reflectorBackCoverHeight])
                cube([widthCross, reflectorCoverDepth * 2, reflectorCoverHeight + 2]);

            translate([coverWidth / 2 -reflectorCoverDepth, reflectorCoverWalls - reflectorCoverPadding, reflectorBackCoverHeight])
                cube([reflectorCoverDepth * 2, widthCross, reflectorCoverHeight + 2]);
        }
    }
}

module coverRound() {
    difference() {
        translate([coverRadius, coverRadius, 0]) {
            group(){
                cylinder(r = coverRadius, h = reflectorBackCoverHeight);
                difference() {
                    cylinder(r = reflectorBackCoverOuterRadius, h = reflectorBackCoverHeight + reflectorBackCoverSnapHeight);
                    cylinder(r = reflectorBackCoverOuterRadius - reflectorBackCoverSnapWidth, h = reflectorBackCoverHeight + reflectorBackCoverSnapHeight + 1);
                }
            }
        }

        translate([coverRadius, coverRadius - innerRadius, -1])
            cylinder(r = coaxialRadius, h = reflectorBackCoverHeight + 2);

        group() {
            translate([reflectorCoverWalls - reflectorCoverPadding, coverWidth/2 -reflectorCoverDepth, reflectorBackCoverHeight])
                cube([widthCross, reflectorCoverDepth * 2, reflectorCoverHeight + 2]);

            translate([coverWidth / 2 -reflectorCoverDepth, reflectorCoverWalls - reflectorCoverPadding, reflectorBackCoverHeight])
                cube([reflectorCoverDepth * 2, widthCross, reflectorCoverHeight + 2]);
        }
    }
}

module renderTop() {
    rotate([0, 270, 270])
        top();
}

module renderBottom() {
    rotate([0, 270, 270])
        bottom();
}

module top() {
    slitHeight = (height) / 2 + slitPaddingTop;
    turnOffset = 0;

    difference() {
        if(enableReflectorMounts == "enabled") {
            support(turnOffset = turnOffset);
        }
        else {
            support(turnOffset = turnOffset, mounts = false);
        }

        translate([-depth, -depth / 2 - slitPadding, -1])
            cube([depth + 2, depth + slitPadding * 2, slitHeight + 1]);

        hull() {
            rotate([0,90,0]) {
                translate([-holeWrapperZ - (spacing * turns) - turnOffset, -innerDiameter, -depth + 1])
                    cylinder(r = cutoutRadius, h = depth + 2);

                translate([-holeWrapperZ - (spacing * turns) - turnOffset, -cutoutY, -depth + 1])
                    cylinder(r = cutoutRadius, h = depth + 2);

                translate([-holeWrapperZ - (spacing * (turns + 1)) - turnOffset, -innerDiameter, -depth + 1])
                    cylinder(r = cutoutRadius, h = depth + 2);

                translate([-holeWrapperZ - (spacing * (turns + 1)) - turnOffset, -cutoutY, -depth + 1])
                    cylinder(r = cutoutRadius, h = depth + 2);
            }
        }
    }
}

module bottom() {
    slitOffset = (height / 2) - slitPaddingTop;
    turnOffset = spacing / 4;

    difference() {
        if(enableReflectorMounts == "enabled") {
            support(turnOffset = turnOffset, mounts = true, both = false);
        }
        else {
            support(turnOffset = turnOffset, mounts = false);
        }

        translate([-depth, -depth / 2 - slitPadding, slitOffset])
            cube([depth + 2, depth + slitPadding * 2, height]);

        hull() {
            rotate([0,90,0]) {
                translate([-holeWrapperZ - (spacing * turns) + spacing / 2 - turnOffset, innerDiameter, -depth + 1])
                    cylinder(r = cutoutRadius, h = depth + 2);

                translate([-holeWrapperZ - (spacing * turns) + spacing / 2 - turnOffset, cutoutY, -depth + 1])
                        cylinder(r = cutoutRadius, h = depth + 2);

                translate([-holeWrapperZ - (spacing * (turns + 1)) + spacing / 2 - turnOffset, innerDiameter, -depth + 1])
                    cylinder(r = cutoutRadius, h = depth + 2);

                translate([-holeWrapperZ - (spacing * (turns + 1)) + spacing / 2 - turnOffset, cutoutY, -depth + 1])
                    cylinder(r = cutoutRadius, h = depth + 2);
            }
        }
    }
}

module support(turnOffset = 0, mounts = true, both = true) {
    difference() {
        group() {
            difference() {
                group() {
                    for(i=[0:1:turns]) {
                        rotate([0,90,0])
                            translate([-holeWrapperZ - spacing * i - turnOffset, holeWrapperY, -depth / 2])
                                cylinder(r = holeWrapperRadius, h = depth);
                    }

                    for(i=[0:1:turns -1]) {
                        rotate([0,90,0])
                            translate([-holeWrapperZ - spacing * i  - spacing / 2 - turnOffset, -holeWrapperY, -depth / 2])
                                cylinder(r = holeWrapperRadius, h = depth);
                    }

                    translate([-depth / 2, -holeWrapperY, 0]) {
                        cube([depth, holeWrapperY * 2, turns * spacing + holeWrapperRadius * 2]);
                    }
                }

                for(i=[0:1:turns]) {
                    rotate([0,90,0]) {
                        hull() {
                            translate([-holeWrapperZ - spacing * (i + 1) + spacing / 2 - turnOffset, holeWrapperY, -depth + 1])
                                cylinder(r = cutoutRadius, h = depth + 2);

                            translate([-holeWrapperZ - spacing * (i + 1) + spacing / 2 - turnOffset, cutoutY, -depth + 1])
                                cylinder(r = cutoutRadius, h = depth + 2);
                        }
                    }
                }

                for(i=[0:1:turns - 1]) {
                    rotate([0,90,0]) {
                        hull() {
                            translate([-holeWrapperZ - spacing * i - spacing / 2 - spacing / 2 - turnOffset, -holeWrapperY, -depth + 1])
                                cylinder(r = cutoutRadius, h = depth + 2);

                            translate([-holeWrapperZ - spacing * i - spacing/2- spacing / 2 - turnOffset, -cutoutY, -depth + 1])
                                cylinder(r = cutoutRadius, h = depth + 2);
                        }
                    }
                }

                rotate([0,90,0]) {
                    hull() {
                        translate([-holeWrapperZ - spacing * -1 - spacing/2- spacing / 2 - turnOffset, -cutoutY, -depth + 1])
                            cylinder(r = cutoutRadius, h = depth + 2);

                        translate([-holeWrapperZ - spacing * -1 - spacing/2- spacing / 2 - turnOffset, -cutoutY * 2, -depth + 1])
                            cylinder(r = cutoutRadius, h = depth + 2);

                        translate([-holeWrapperZ - spacing * -2 - spacing/2- spacing / 2 - turnOffset, -cutoutY, -depth + 1])
                            cylinder(r = cutoutRadius, h = depth + 2);

                        translate([-holeWrapperZ - spacing * -2 - spacing/2- spacing / 2 - turnOffset, -cutoutY * 2, -depth + 1])
                            cylinder(r = cutoutRadius, h = depth + 2);
                    }

                    hull() {
                        translate([-holeWrapperZ + spacing / 2 - turnOffset, holeWrapperY, -depth + 1])
                            cylinder(r = cutoutRadius, h = depth + 2);

                        translate([-holeWrapperZ + spacing / 2 - turnOffset, cutoutY, -depth + 1])
                            cylinder(r = cutoutRadius, h = depth + 2);

                        translate([-holeWrapperZ - spacing * -1 + spacing / 2 - turnOffset, holeWrapperY, -depth + 1])
                            cylinder(r = cutoutRadius, h = depth + 2);

                        translate([-holeWrapperZ - spacing * -1 + spacing / 2 - turnOffset, cutoutY, -depth + 1])
                            cylinder(r = cutoutRadius, h = depth + 2);
                    }
                }
            }

            // Full mount
            if(mounts && both) {
                difference() {
                    translate([-depth / 2,-reflectorDiameterOuter / 2, -reflectorWalls - reflectorThickness])
                        cube([depth, reflectorDiameterOuter, reflectorWalls * 2 + reflectorThickness]);

                    translate([-depth / 2 - 1,-reflectorRadius, -reflectorThickness])
                        cube([depth + 2, reflectorDiameter, reflectorThickness]);

                    translate([-depth / 2 - 1, -reflectorRadius + reflectorWalls, -reflectorWalls - reflectorThickness - 1])
                        cube([depth + 2, reflectorDiameter - reflectorWalls * 2, reflectorWalls + 2]);
                }
            }

            // Half mount
            if(mounts && !both) {
                difference() {
                    translate([-depth / 2, 0, -reflectorWalls - reflectorThickness])
                        cube([depth, reflectorDiameterOuter / 2, reflectorWalls * 2 + reflectorThickness]);

                    translate([-depth / 2 - 1,-reflectorRadius, -reflectorThickness])
                        cube([depth + 2, reflectorDiameter, reflectorThickness]);

                    translate([-depth / 2 - 1, -reflectorRadius + reflectorWalls, -reflectorWalls - reflectorThickness - 1])
                        cube([depth + 2, reflectorDiameter - reflectorWalls * 2, reflectorWalls + 2]);
                }
            }
        }

        // Holes left
        for(i=[0:1:turns - 1]) {
            rotate([0,90,0]) {
                translate([-holeWrapperZ - spacing * i - spacing / 2 - turnOffset, -holeWrapperY, -depth + 1])
                    cylinder(r = holeRadius, h = depth + 2);
            }
        }

        // Holes right
        for(i=[0:1:turns]) {
            rotate([0,90,0]) {
                translate([-holeWrapperZ - spacing * i - turnOffset, holeWrapperY, -depth + 1])
                    cylinder(r = holeRadius, h = depth + 2);
            }
        }
    }
}

module template(cw = true) {
    additionalHeight = height / turns;
    difference() {
        cylinder(h=height + additionalHeight, r = innerRadius + conductorRadius / 3);

        translate([0, 0, conductorRadius * 3 + 2]) {
            helix(
                turns = turns + 1,
                innerRadius = innerRadius + conductorRadius,
                radius = conductorRadius,
                height = height + additionalHeight,
                cw = cw,
                slices = resolution
            );

            rotate([90,0,90])
                cylinder(r=conductorRadius, h = innerRadius + conductorRadius);
        }
    }
}

module helix(turns = 5, innerRadius = 8.75, radius = 0.5, height = 59.4, cw = true, slices = 50) {
    if(cw) {
        rotate([0, 180, 180]) {
            elliptic_spring(
                turns = turns,
                R = innerRadius,
                r = radius,
                height = height * -1,
                slices = 50);
        }
    }
    else {
        elliptic_spring(
            turns = turns,
            R = innerRadius,
            r = radius,
            height = height,
            slices = 50);
    }
}

module elliptic_ring(R = 10, r = 2, slices = 50, h = 0, w = 360) {
    dz = h / slices;
    dwx = atan(h / (R * 2) / PI);
	for (i = [0:slices-1]) {
        hull() {
            translate([R * cos((i + 1) * w / slices), R * sin((i + 1) * w / slices), (i + 1) * dz])
                rotate([90 + dwx, 0, (i + 1) * w / slices])
                    cylinder(r = r, h = 0.01);

             translate([R * cos((i) * w / slices), R * sin((i) * w / slices), i * dz])
                rotate([90 + dwx, 0, i * w / slices])
                    cylinder(r = r, h = 0.01);
        }
    }
}

module elliptic_spring(turns = 5, R = 20, r = 1, height = 20, slices = 50) {
    turnHeight = height / turns;
    for(i = [0:turns - 1])
        translate([0, 0, turnHeight * i])
            elliptic_ring(R, r, slices, turnHeight);
}
```


[User]
Hi! I'm looking to get a parametric OpenSCAD design for a kitchen sponge holder. It should have a cylindrical base with a lip around the edge and an inscription on the front that says "SPONGE". I want to be able to change the dimensions of the holder and the size of the text easily.

Here are the specific things I want:

*   **Cylindrical Base:** The main part of the holder should be a cylinder.
*   **Lip:** There should be a lip around the edge of the cylinder, made by making a slightly smaller cylinder and putting it on top.
*   **Text Inscription:** The word "SPONGE" should be cut out of the face of the cylinder. It should be centered and its size should be customizable.
*   **Parametric Design:** I need to be able to easily change the following:
    *   Overall length of the holder
    *   Overall width of the holder
    *   Thickness of the base
    *   Height of the lip
    *   Size of the text in the X and Y directions
    *   Text Font
    *   Spacing between the cuts on the front of the base.
*   **Cutting Details**: There should be a series of cutouts on the base to allow for water to escape. These should run vertically, and be evenly spaced.

I'm thinking a design like this would be ideal. I'd like to keep the code fairly simple and readable if possible. I'm comfortable with standard OpenSCAD functions; I don't need any external libraries or anything. Could you help me with that?

[Assistant]
sponge_holder.scad:
```
thick = 5;
length = 120;
width = 85;
extrude_h = 8;
text_sizeX = 110;
text_sizeY = 49;
font = "arial";
gap_spacing = 4;

difference(){
    resize([length,width,thick+extrude_h]){
       cylinder( r = width, h = thick );
    }
    translate([0,0,thick]){
        scale([0.9,0.9,2]){
            resize([length,width,thick]){
                cylinder( r = width, h = thick );
            }
        }
    }
    translate([0,0,thick+extrude_h/2]){
        cube([length, text_sizeY+2*gap_spacing, extrude_h], center=true);
    }
    for (ii = [0:20:180]){
        rotate([0,0,ii]){
            translate([0,0,thick+extrude_h/2]){
                cube([length,gap_spacing,extrude_h], center=true);
            }
        }
    }
}

difference(){
    intersection(){
        resize([text_sizeX,text_sizeY,extrude_h]){
            translate([0,0,thick]){
                linear_extrude( height = extrude_h ){
                   text("SPONGE", font=font, halign="center", valign="center");
                }
            }
        }
        resize([length,width,thick+extrude_h]){
            cylinder( r = width, h = thick );
        }
    }
    for (ii = [-(width-27)/2:2*gap_spacing:width]){
        translate([-length/2,ii,thick]){
            cube([length,gap_spacing,extrude_h]);
        }
    }
}

```


[User]
I'd like to create a parametric horn design in OpenSCAD, and I need some help putting the code together. The horn should be able to have both rectangular and elliptical cross-sections, and I need to be able to control a variety of parameters.

Here are the specifications:

*   **Overall Shape:** The basic shape is an exponential horn, transitioning from a smaller "throat" to a larger "mouth".
*   **Parameters:**
    *   `length`: The length of the horn from throat to mouth.
    *   `throat`: A vector defining the width and height of the throat (smaller end).
    *   `mouth`: A vector defining the width and height of the mouth (larger end).
    *   `wallThickness`: The thickness of the horn walls.
    *   `numSections`: The number of slices or sections used to construct the horn along its length (more sections will be more detailed but slower to render).
    *   `rectangular`: A boolean flag. When `true`, the horn cross-sections will be rectangular. When `false`, they'll be elliptical/round.
    *   `flangeLength`: The length of a flat flange that extends outward from the mouth; set to zero to omit the flange.
    *   `flangeFlare`: How far out the flange flares from the horn body.
*   **Libraries:** I'm already using a tubemesh library to handle the meshing, so we'll need that to be built into the scad files. The implementation of that library doesn't really matter for this request, though.

The design should be composed of two .scad files: one for the main horn logic and another for the demo which should use the horn .scad file, and the demo file should include the ability to adjust all of the parameters mentioned above. The horn module itself should be designed so that it generates a solid horn and a second module should shell that solid horn using Minkowski sums, and it should also create a flange around the mouth of the horn. Make sure that all surfaces are water-tight, or close enough (using OpenSCAD's minkowski sum for shelling, and intersection/difference operations with an enclosing cube). Make sure that the design should have no dependency on any OpenSCAD libraries except for my tubemesh library.

To clarify, the horn should be created using `morphExtrude` from `tubemesh.scad`, and you'll have to include the utility functions like `pointsAndFaces` in the horn.scad file. The flange should be an additional `morphExtrude` object tacked onto the end of the main horn shape.

Can you create the needed `.scad` files to do this for me?

[Assistant]
horndemo-standalone.scad:
```
length = 100;
throatWidth = 45;
throatHeight = 40;
mouthWidth = 120;
mouthHeight = 60;
wallThickness = 1.4;
numSections = 20;
flangeLength = 4;
flangeFlare = 3;
rectangular = 1; // [1:yes, 0:no]

module end_of_parameters_dummy() {}

//use <horn.scad>;
//use <tubemesh.scad>;
// params = [sections,sectionCounts]

// written for tail-recursion
// _subtotals[i] = list[0] + ... + list[i-1]
function _subtotals(list,soFar=[]) =
        len(soFar) >= 1+len(list) ? soFar :
        _subtotals(list,
            let(n1=len(soFar))
            concat(soFar, n1>0 ? soFar[n1-1]+list[n1-1] : 0));

function _flatten(list) = [for (a=list) for(b=a) b];

function _reverseTriangle(t) = [t[2], t[1], t[0]];

// smallest angle in triangle
function _minAngle(p1,p2,p3) =
    let(a = p2-p1,
        b = p3-p1,
        c = p3-p2,
        v1 = a*b,
        v2 = -(c*a))
        v1 == 0 || v2 == 0 ? 0 :
        let( na = norm(a),
             a1 = acos(v1 / (na*norm(b))),
             a2 = acos(v2 / (na*norm(c))) )
        min(a1,a2,180-(a1+a2));

// triangulate square to maximize smallest angle
function _doSquare(points,i11,i21,i22,i12,optimize=true) =
    points[i11]==points[i12] ? [[i11,i21,i22]] :
    points[i21]==points[i22] ? [[i22,i12,i11]] :
    !optimize ? [[i11,i21,i22], [i22,i12,i11]] :
    let (m1 = min(_minAngle(points[i11],points[i21],points[i22]), _minAngle(points[i22],points[i12],points[i11])),
        m2 = min(_minAngle(points[i11],points[i21],points[i12]),
                _minAngle(points[i21],points[i22],points[i12])) )
        m2 <= m1 ? [[i11,i21,i22], [i22,i12,i11]] :
                  [[i11,i21,i12], [i21,i22,i12]];

/*
function _inTriangle(v1,t) = (v1==t[0] || v1==t[1] || v1==t[2]);

function _findTheDistinctVertex(t1,t2) =
    let(in = [for(i=[0:2]) _inTriangle(t1[i],t2)])
    ! in[0] && in[1] && in[2] ? 0 :
    ! in[1] && in[0] && in[2] ? 1 :
    ! in[2] && in[0] && in[1] ? 2 :
    undef;

// make vertex i come first
function _rotateTriangle(t,i) =
    [for (j=[0:2]) t[(j+i)%3]];

function _optimize2Triangles(points,t1,t2) =
    let(i1 = _findTheDistinctVertex(t1,t2))
    i1 == undef ? [t1,t2] :
    let(i2 = _findTheDistinctVertex(t2,t1))
    i2 == undef ? [t1,t2] :
    let(t1 = _rotateTriangle(t1,i1),
        t2 = _rotateTriangle(t2,i2))
    _doSquare(points,t1[1],t2[0],t2[1],t1[0],optimize=true);

// a greedy optimization for a strip of triangles most of which adjoin one another; written for tail-recursion
function _optimizeTriangles(points,triangles,position=0,optimize=true,iterations=4) =
        !optimize || position >= iterations*len(triangles) ? triangles :
            _optimizeTriangles(points,
                let(
                    n = len(triangles),
                    position1=position%n,
                    position2=(position+1)%n,
                    opt=_optimize2Triangles(points,triangles[position1],triangles[position2]))
                    [for (i=[0:len(triangles)-1])
                        i == position1 ? opt[0] :
                        i == position2 ? opt[1] :
                            triangles[i]],
                position=position+1);
*/

function _removeEmptyTriangles(points,triangles) =
    [for(t=triangles)
        if(true || points[t[0]] != points[t[1]] && points[t[1]] != points[t[2]] && points[t[2]] != points[t[0]]) t];

// n1 and n2 should be fairly small, so this doesn't need
// tail-recursion
// this assumes n1<=n2
function _tubeSegmentTriangles(points,index1,n1,index2,n2,i=0,soFar=[],optimize=true)
    = i>=n2 ? _removeEmptyTriangles(points,soFar) :
            let(i21=i,
                i22=(i+1)%n2,
                i11=floor((i21)*n1/n2+0.5)%n1,
                i12=floor((i22)*n1/n2+0.5)%n1,
                add = i11==i12 ? [[index1+i11,index2+i21,index2+i22]] :
                    _doSquare(points,index1+i11,index2+i21,index2+i22,index1+i12,optimize=optimize))
                _tubeSegmentTriangles(points,index1,n1,index2,n2,i=i+1,soFar=concat(soFar,add),optimize=optimize);

function _tubeSegmentFaces(points,index,n1,n2,optimize=true)
    = n1<n2 ? _tubeSegmentTriangles(points,index,n1,index+n1,n2,optimize=optimize) :
        [for (f=_tubeSegmentTriangles(points,index+n1,n2,index,n1,optimize=optimize)) _reverseTriangle(f)];

function _tubeMiddleFaces(points,counts,subtotals,optimize=true) = [ for (i=[1:len(counts)-1])
           for (face=_tubeSegmentFaces(points,subtotals[i-1],counts[i-1],counts[i],optimize=optimize)) face ];

function _endCaps(counts,subtotals,startCap=true,endCap=true) =
    let( n = len(counts),
         cap1 = counts[0]<=2 || !startCap ? undef : [for(i=[0:counts[0]-1]) i],
         cap2 = counts[n-1]<=2 || !endCap ? undef : [for(i=[counts[n-1]-1:-1:0]) subtotals[n-1]+i] )
       [for (c=[cap1,cap2]) if (c!=undef) c];

function _tubeFaces(sections,startCap=true,endCap=true,optimize=true) =
                let(
        counts = [for (s=sections) len(s)],
        points = _flatten(sections),
        subtotals = _subtotals(counts))
            concat(_tubeMiddleFaces(points,counts,subtotals,optimize=optimize),_endCaps(counts,subtotals,startCap=true,endCap=true));

function _removeDuplicates1(points,soFar=[[],[]]) =
        len(soFar[0]) >= len(points) ? soFar :
            _removeDuplicates1(points,
               let(
                mapSoFar=soFar[0],
                pointsSoFar=soFar[1],
                j=len(mapSoFar),
                k=search([points[j]], pointsSoFar)[0])
                k == []? [concat(mapSoFar,[len(pointsSoFar)]),
                            concat(pointsSoFar,[points[j]])] :
                           [concat(mapSoFar,[k]),pointsSoFar]);

function _removeDuplicates(points, faces) =
    let(fix=_removeDuplicates1(points),
        map=fix[0],
        newPoints=fix[1],
        newFaces=[for(f=faces) [for(v=f) map[v]]])
            [newPoints, newFaces];

function pointsAndFaces(sections,startCap=true,endCap=true,optimize=true) =
        let(
            points0=_flatten(sections),
            faces0=_tubeFaces(sections,startCap=startCap,endCap=endCap,optimize=optimize)) [points0,faces0];
//        _removeDuplicates(points0,faces0);

// increase number of points from len(section) to n
function _interpolateSection(section,n) =
        let(m=len(section))
        n == m ? section :
        n < m ? undef :
            [for(i=[0:m-1])
                let(cur=floor(i*n/m),
                    k=floor((i+1)*n/m)-cur,
                    i2=(i+1)%m)
                    for(j=[0:k-1])
                        let(t=j/k)
                            section[i]*(1-t)+section[i2]*t];

function ngonPoints(n=4,r=10,d=undef,rotate=0,z=undef) =
            let(r=d==undef?r:d/2)
            z==undef ?
            r*[for(i=[0:n-1]) let(angle=i*360/n+rotate) [cos(angle),sin(angle)]] :
            [for(i=[0:n-1]) let(angle=i*360/n+rotate) [r*cos(angle),r*sin(angle),z]];

function starPoints(n=10,r1=5,r2=10,rotate=0,z=undef) =
          z==undef ?
            [for(i=[0:2*n-1]) let(angle=i*180/n+rotate) (i%2?r1:r2) * [cos(angle),sin(angle)]] :
            [for(i=[0:2*n-1]) let(angle=i*180/n+rotate, r=i%2?r1:r2) [r*cos(angle),r*sin(angle),z]];

// warning: no guarantee of perfect convexity
module mySphere(r=10,d=undef) {
    GA = 2.39996322972865332 * 180 / PI;
    radius = d==undef ? r : d/2;
    pointsAround =
        $fn ? $fn :
        max(3, floor(0.5+360/$fa), floor(0.5+2*radius*PI/$fs));
    numSlices0 = (pointsAround + pointsAround % 2)/2;
    numSlices = numSlices0 + (numSlices0%2);
    sections = radius*[for(i=[0:numSlices])
                    i == 0 ? [[0,0,-1]] :
                    i == numSlices ? [[0,0,1]] :
                    let(
                        lat = (i-numSlices/2)/(numSlices/2)*90,
                        z1 = sin(lat),
                        r1 = cos(lat),
                        count = max(3,floor(0.5 + pointsAround * abs(r1))))
                        ngonPoints(count,r=r1,z=z1)];
    data = pointsAndFaces(sections,optimize=false);
    polyhedron(points=data[0], faces=data[1]);
}

module morphExtrude(section1,section2,height=undef,twist=0,numSlices=10,startCap=true,endCap=true,optimize=false) {
    n = max(len(section1),len(section2));

    section1interp = _interpolateSection(section1,n);
    section2interp = _interpolateSection(section2,n);
    sections = height == undef ?
                      [for(i=[0:numSlices])
                        let(t=i/numSlices)
                        (1-t)*section1interp+t*section2interp] :
                      [for(i=[0:numSlices])
                        let(t=i/numSlices,
                            theta = t*twist,
                            section=(1-t)*section1interp+t*section2interp)
                        [for(p=section) [p[0]*cos(theta)-p[1]*sin(theta),p[0]*sin(theta)+p[1]*cos(theta),height*t]]];

    data = pointsAndFaces(sections,startCap=startCap,endCap=endCap,optimize=false);
    polyhedron(points=data[0], faces=data[1]);
}

module cone(r=10,d=undef,height=10) {
    radius = d==undef ? r : d/2;
    pointsAround =
        $fn ? $fn :
        max(3, floor(0.5+360/$fa), floor(0.5+2*radius*PI/$fs));
    morphExtrude(ngonPoints(n=pointsAround,r=radius), [[0,0]], height=height,optimize=false);
}

module prism(base=[[0,0,0],[1,0,0],[0,1,0]], vertical=[0,0,1]) {
    morphExtrude(base,[for(v=base) v+vertical],numSlices=1);
}

//use <roundedsquare.scad>;
module roundedSquare(size=[10,10], radius=1, center=false, $fn=16) {
    size1 = (size+0==size) ? [size,size] : size;
    if (radius <= 0) {
        square(size1, center=center);
    }
    else {
        translate(center ? -size1/2 : [0,0])
        hull() {
            translate([radius,radius]) circle(r=radius);
            translate([size1[0]-radius,radius]) circle(r=radius);
            translate([size1[0]-radius,size1[1]-radius]) circle(r=radius);
            translate([radius,size1[1]-radius]) circle(r=radius);
        }
    }
}

module roundedOpenTopBox(size=[10,10,10], radius=2, wall=1, solid=false) {
    render(convexity=2)
    difference() {
        linear_extrude(height=size[2]) roundedSquare(size=[size[0],size[1]], radius=radius);
        if (!solid) {
            translate([0,0,wall])
            linear_extrude(height=size[2]-wall)
            translate([wall,wall]) roundedSquare(size=[size[0]-2*wall,size[1]-2*wall], radius=radius-wall);
        }
    }
}

module dummy(){}

module horn(throat=[45,40], mouth=[120,60], length=100, wallThickness=1.4, numSections=20, flangeLength=4, flangeFlare=3, rectangular=true, solidFlangeOnly=false) {

    function getExponent(ratio) = pow(ratio, 1/length);

    mouthWidth = len(mouth)==2 ? mouth[0] : mouth;
    mouthHeight = len(mouth)==2 ? mouth[1] : mouth;
    throatWidth = len(throat)==2 ? throat[0] : throat;
    throatHeight = len(throat)==2 ? throat[1] : throat;

    wExp = getExponent(mouthWidth/throatWidth);
    hExp = getExponent(mouthHeight/throatHeight);

    function section(x,y,z) =
        rectangular ?
            [ [x,y,z], [-x,y,z], [-x,-y,z], [x,-y,z] ]:
            [ for(t=[0:10:350]) [x*cos(t), y*sin(t), z]];

    sections =
        [ for(i=[0:numSections])
            let(z=i/numSections*length,
                x=pow(wExp,length-z)*throatWidth/2,
                y=pow(hExp,length-z)*throatHeight/2)
            section(x,y,z) ];

    module hornShape() {
        data = pointsAndFaces(sections,startCap=true,endCap=true,optimize=true);
        polyhedron(points=data[0], faces=data[1]);
    }

/*    module hornShellQuick() {
        render(convexity=2)
        difference() {
            scale([(mouthWidth+wallThickness*2)/mouthWidth,(mouthHeight+wallThickness*2)/mouthHeight,1]) hornShape();
        }
    } */

    module hornShellGood() {
        render(convexity=2)
        intersection() {
            difference() {
                minkowski() {
                    hornShape();
                    sphere(r=wallThickness,$fn=12);
                }
                hornShape();
            }
            translate([-mouthWidth/2-wallThickness,-mouthHeight/2-wallThickness,0])
            cube([mouthWidth+2*wallThickness,mouthHeight+2*wallThickness,length]);
        }
    }

    module flange(hollow=true) {
        if (flangeLength>0) {
            x1 = throatWidth/2+wallThickness;
            y1 = throatHeight/2+wallThickness;
            x2 = x1 + flangeFlare;
            y2 = y1 + flangeFlare;
            render(convexity=2)
            difference() {
                morphExtrude(section(x1,y1,0), section(x2,y2,flangeLength),numSlices=1);
                if (hollow)
                    morphExtrude(section(throatWidth/2,throatHeight/2,-1), section(throatWidth/2,throatHeight/2,flangeLength+1),numSlices=1);
            }
        }
    }

    if (!solidFlangeOnly)
        hornShellGood();
    translate([0,0,solidFlangeOnly?0:length-0.001]) flange(hollow=!solidFlangeOnly);
}

horn(length=length, throat=[throatWidth,throatHeight], mouth=[mouthWidth,mouthHeight], wallThickness=wallThickness, numSections=numSections, flangeLength=flangeLength, flangeFlare=flangeFlare, rectangular=rectangular);

```
horn.scad:
```
use <tubemesh.scad>;

module dummy(){}

module horn(throat=[45,40], mouth=[120,60], length=100, wallThickness=1.4, numSections=20, flangeLength=4, flangeFlare=3, rectangular=true, solidFlangeOnly=false) {

    function getExponent(ratio) = pow(ratio, 1/length);

    mouthWidth = len(mouth)==2 ? mouth[0] : mouth;
    mouthHeight = len(mouth)==2 ? mouth[1] : mouth;
    throatWidth = len(throat)==2 ? throat[0] : throat;
    throatHeight = len(throat)==2 ? throat[1] : throat;

    wExp = getExponent(mouthWidth/throatWidth);
    hExp = getExponent(mouthHeight/throatHeight);

    function section(x,y,z) =
        rectangular ?
            [ [x,y,z], [-x,y,z], [-x,-y,z], [x,-y,z] ]:
            [ for(t=[0:10:350]) [x*cos(t), y*sin(t), z]];

    sections =
        [ for(i=[0:numSections])
            let(z=i/numSections*length,
                x=pow(wExp,length-z)*throatWidth/2,
                y=pow(hExp,length-z)*throatHeight/2)
            section(x,y,z) ];

    module hornShape() {
        data = pointsAndFaces(sections,startCap=true,endCap=true,optimize=true);
        polyhedron(points=data[0], faces=data[1]);
    }

/*    module hornShellQuick() {
        render(convexity=2)
        difference() {
            scale([(mouthWidth+wallThickness*2)/mouthWidth,(mouthHeight+wallThickness*2)/mouthHeight,1]) hornShape();
        }
    } */

    module hornShellGood() {
        render(convexity=2)
        intersection() {
            difference() {
                minkowski() {
                    hornShape();
                    sphere(r=wallThickness,$fn=12);
                }
                hornShape();
            }
            translate([-mouthWidth/2-wallThickness,-mouthHeight/2-wallThickness,0])
            cube([mouthWidth+2*wallThickness,mouthHeight+2*wallThickness,length]);
        }
    }

    module flange(hollow=true) {
        if (flangeLength>0) {
            x1 = throatWidth/2+wallThickness;
            y1 = throatHeight/2+wallThickness;
            x2 = x1 + flangeFlare;
            y2 = y1 + flangeFlare;
            render(convexity=2)
            difference() {
                morphExtrude(section(x1,y1,0), section(x2,y2,flangeLength),numSlices=1);
                if (hollow)
                    morphExtrude(section(throatWidth/2,throatHeight/2,-1), section(throatWidth/2,throatHeight/2,flangeLength+1),numSlices=1);
            }
        }
    }

    if (!solidFlangeOnly)
        hornShellGood();
    translate([0,0,solidFlangeOnly?0:length-0.001]) flange(hollow=!solidFlangeOnly);
}

```


[User]
Hey, I'm looking to design a customizable lightbox, kind of like the one described on Thingiverse by mightynozzle.  I want to be able to adjust the dimensions, wall thicknesses, number of light sections, the font used for the characters, and the corner radius of the box.

Specifically, I want the design to generate three main parts: the lightbox itself, a lid that fits into the box, and character plates that slide into the lid. The lid should have rails to hold the character plates in place, and the box should also have rails to accept the lid.

I'd need parameters for:

*   `lightbox_width_in_millimeter`:  The overall width of the lightbox.
*   `lightbox_height_in_millimeter`: The overall height of the lightbox.
*   `lightbox_depth_in_millimeter`:  The depth of the box, from the back of the box to the back of the lid.
*   `box_thickness_in_millimeter`:  The thickness of the box walls.
*   `lid_thickness_in_millimeter`: The thickness of the lid walls.
*   `plate_thickness_in_millimeter`: The thickness of the character plates.
*   `font`: A selection between "siren" (Siren Stencil) and "stardos" (Stardos Stencil) fonts.
*   `number_of_sections`: The number of horizontal rows the character plates will be arranged in.
*    `insert_hole_diameter_in_millimeter`: The diameter of the hole on the back of the box for inserting lights.
*   `rounded_corner_radius_in_millimeter`: The radius of the rounded corners.
* `tolerance_in_millimeter`: A tolerance variable for clearances.

I'd also like the generated code to include a module that allows all parts to be rendered at once, in different colors, for preview purposes.

The character plates need to be created based on the selected font, using the character lists that are provided in the original code. They should also be appropriately sized based on the lid dimensions and number of sections.

Also, could you make sure the lid and box have rounded edges based on the specified `rounded_corner_radius_in_millimeter` parameter, and the appropriate tolerances for fit?

It might also be helpful to include a module to generate just a single character plate, so I can easily test out different fonts and character options.

It should also handle the special cases of "#" character on stardos font, which has extra shape.

I think that should be everything.

[Assistant]
customizable_lightbox.scad:
```
/*
 * Customizable Lightbox - https://www.thingiverse.com/thing:2498966
 * by Dennis Hofmann - https://www.thingiverse.com/mightynozzle/about
 * created 2017-08-24
 * version v1.0
 *
 * Changelog
 * --------------
 * v1.0:
 *      - final design
 * --------------
 *
 * This work is licensed under the Creative Commons - Attribution - Non-Commercial license.
 * https://creativecommons.org/licenses/by-nc/3.0/
 */

 // Parameter Section //
//-------------------//

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

/* [Lightbox Settings] */

// Choose, which part you want to see!
part = "all_parts__"; //[all_parts__:All Parts,box__:Lightbox,box_lid__:Lightbox Lid,character_plate_a__:Character Plate A,character_plate_b__:Character Plate B,character_plate_c__:Character Plate C,character_plate_d__:Character Plate D,character_plate_e__:Character Plate E,character_plate_f__:Character Plate F,character_plate_g__:Character Plate G,character_plate_h__:Character Plate H,character_plate_i__:Character Plate I,character_plate_j__:Character Plate J,character_plate_k__:Character Plate K,character_plate_l__:Character Plate L,character_plate_m__:Character Plate M,character_plate_n__:Character Plate N,character_plate_o__:Character Plate O,character_plate_p__:Character Plate P,character_plate_q__:Character Plate Q,character_plate_r__:Character Plate R,character_plate_s__:Character Plate S,character_plate_t__:Character Plate T,character_plate_u__:Character Plate U,character_plate_v__:Character Plate V,character_plate_w__:Character Plate W,character_plate_x__:Character Plate X,character_plate_y__:Character Plate Y,character_plate_z__:Character Plate Z,character_plate_0__:Character Plate 0,character_plate_1__:Character Plate 1,character_plate_2__:Character Plate 2,character_plate_3__:Character Plate 3,character_plate_4__:Character Plate 4,character_plate_5__:Character Plate 5,character_plate_6__:Character Plate 6,character_plate_7__:Character Plate 7,character_plate_8__:Character Plate 8,character_plate_9__:Character Plate 9,character_plate_ampersand__:Character Plate Ampersand,character_plate_question_mark__:Character Plate Question Mark,character_plate_exclamation_point__:Character Plate Exclamation Point,character_plate_comma__:Character Plate Comma,character_plate_point__:Character Plate Point,character_plate_minus__:Character Plate Minus,character_plate_dollar_sign__:Character Plate Dollar Sign,character_plate_slash__:Character Plate Slash,character_plate_equals__:Character Plate Equals,character_plate_plus__:Character Plate Plus,character_plate_asterisk__:Character Plate Asterisk,character_plate_hash__:Character Plate Hash,character_plate_blank__:Character Plate Blank]

// The width of the lightbox
lightbox_width_in_millimeter = 210.0; //[20:400]

// The height of the lightbox
lightbox_height_in_millimeter = 160.0; //[20:400]

// The depth of the lightbox. This means the distance of the back of the box to the back of the lid.
lightbox_depth_in_millimeter = 30.0; //[20:100]

// Wall thickness of the lightbox. The lower the value, the more light shines throw the box.
box_thickness_in_millimeter = 1.92; //[0.5:0.1:10]

// Wall tickness of the lid. The lower the value, the more light shines throw the lid.
lid_thickness_in_millimeter = 0.6;

// Thickness of the character plates.
plate_thickness_in_millimeter = 2;

// You can choose between two fonts
font = "siren"; //[siren:Siren Stencil,stardos:Stardos Stencil]

// Number of light sections
number_of_sections = 4; //[1:1:20]

// Diameter of the hole, allowing you to plug the lighting into the light box.
insert_hole_diameter_in_millimeter = 11.0;

// Radius of the corner.
rounded_corner_radius_in_millimeter = 0.0;

// Tolerance
tolerance_in_millimeter = 0.2;

/* [Hidden] */
box_width = lightbox_width_in_millimeter;
box_height = lightbox_height_in_millimeter;
box_depth = lightbox_depth_in_millimeter;
sections = number_of_sections;
box_th = box_thickness_in_millimeter;
lid_th = lid_thickness_in_millimeter;
mount_th = plate_thickness_in_millimeter;
insert_hole_dia = insert_hole_diameter_in_millimeter;
corner_radius = rounded_corner_radius_in_millimeter;
overall_lid_th = lid_th + mount_th;
tolerance = tolerance_in_millimeter;
tolerance2 = tolerance * 2;
tolerance3 = tolerance * 3;
tolerance4 = tolerance * 4;
box_th2 = box_th * 2;
box_th3 = box_th * 3;
lid_th2 = lid_th * 2;
lid_th3 = lid_th * 3;
lid_th4 = lid_th * 4;
inner_lid_width = box_height - box_th2 - lid_th4 - tolerance2;
letter_height = (inner_lid_width + lid_th4) / sections - lid_th4 - tolerance2;
letter_width = letter_height * 0.75;
google_font_siren = "Sirin Stencil:style=Regular";
google_font_stardos = "Stardos Stencil:style=Regular";
box_color = "DeepSkyBlue";
lid_color = "HotPink";
letter_color = "DimGray";

$fn=40;

char_and_margin_siren = [
    ["A", 0.15], ["B", 0.15], ["C", 0.16], ["D", 0.15], ["E", 0.18], ["F", 0.18], ["G", 0.12],
    ["H", 0.13], ["I", 0.27], ["J", 0.28], ["K", 0.14], ["L", 0.20], ["M", 0.08], ["N", 0.13],
    ["O", 0.12], ["P", 0.17], ["Q", 0.11], ["R", 0.15], ["S", 0.18], ["T", 0.16], ["U", 0.12],
    ["V", 0.15], ["W", 0.05], ["X", 0.16], ["Y", 0.15], ["Z", 0.14],
    ["0", 0.13], ["1", 0.22], ["2", 0.16], ["3", 0.16], ["4", 0.16], ["5", 0.17], ["6", 0.15],
    ["7", 0.22], ["8", 0.16], ["9", 0.16],
    ["&", 0.07], ["?", 0.18], ["!", 0.28], [",", 0.10], [".", 0.10], ["-", 0.16], ["$", 0.18],
    ["/", 0.20], ["=", 0.09], ["+", 0.09], ["*", 0.15], ["#", 0.10], ["",0]
];

char_and_margin_stardos = [
    ["A", 0.13], ["B", 0.12], ["C", 0.12], ["D", 0.11], ["E", 0.13], ["F", 0.15], ["G", 0.12],
    ["H", 0.10], ["I", 0.24], ["J", 0.19], ["K", 0.10], ["L", 0.15], ["M", 0.04], ["N", 0.10],
    ["O", 0.11], ["P", 0.15], ["Q", 0.09], ["R", 0.12], ["S", 0.15], ["T", 0.13], ["U", 0.09],
    ["V", 0.12], ["W", 0.02], ["X", 0.12], ["Y", 0.13], ["Z", 0.12],
    ["0", 0.16], ["1", 0.16], ["2", 0.17], ["3", 0.17], ["4", 0.16], ["5", 0.17], ["6", 0.16],
    ["7", 0.16], ["8", 0.17], ["9", 0.16],
    ["&", 0.06], ["?", 0.19], ["!", 0.24], [",", 0.10], [".", 0.10], ["-", 0.23], ["$", 0.15],
    ["/", 0.26], ["=", 0.08], ["+", 0.09], ["*", 0.19], ["#", 0.17], ["",0]
];

 // Program Section //
//-----------------//
echo(letter_height = letter_height);
echo(letter_width = letter_width);
if(part == "box__") {
    color(box_color) box();
} else if(part == "box_lid__") {
    color(lid_color) lid();
} else if(part == "character_plate_a__") {
    color(letter_color) character_plate(0);
} else if(part == "character_plate_b__") {
    color(letter_color) character_plate(1);
} else if(part == "character_plate_c__") {
    color(letter_color) character_plate(2);
} else if(part == "character_plate_d__") {
    color(letter_color) character_plate(3);
} else if(part == "character_plate_e__") {
    color(letter_color) character_plate(4);
} else if(part == "character_plate_f__") {
    color(letter_color) character_plate(5);
} else if(part == "character_plate_g__") {
    color(letter_color) character_plate(6);
} else if(part == "character_plate_h__") {
    color(letter_color) character_plate(7);
} else if(part == "character_plate_i__") {
    color(letter_color) character_plate(8);
} else if(part == "character_plate_j__") {
    color(letter_color) character_plate(9);
} else if(part == "character_plate_k__") {
    color(letter_color) character_plate(10);
} else if(part == "character_plate_l__") {
    color(letter_color) character_plate(11);
} else if(part == "character_plate_m__") {
    color(letter_color) character_plate(12);
} else if(part == "character_plate_n__") {
    color(letter_color) character_plate(13);
} else if(part == "character_plate_o__") {
    color(letter_color) character_plate(14);
} else if(part == "character_plate_p__") {
    color(letter_color) character_plate(15);
} else if(part == "character_plate_q__") {
    color(letter_color) character_plate(16);
} else if(part == "character_plate_r__") {
    color(letter_color) character_plate(17);
} else if(part == "character_plate_s__") {
    color(letter_color) character_plate(18);
} else if(part == "character_plate_t__") {
    color(letter_color) character_plate(19);
} else if(part == "character_plate_u__") {
    color(letter_color) character_plate(20);
} else if(part == "character_plate_v__") {
    color(letter_color) character_plate(21);
} else if(part == "character_plate_w__") {
    color(letter_color) character_plate(22);
} else if(part == "character_plate_x__") {
    color(letter_color) character_plate(23);
} else if(part == "character_plate_y__") {
    color(letter_color) character_plate(24);
} else if(part == "character_plate_z__") {
    color(letter_color) character_plate(25);
} else if(part == "character_plate_0__") {
    color(letter_color) character_plate(26);
} else if(part == "character_plate_1__") {
    color(letter_color) character_plate(27);
} else if(part == "character_plate_2__") {
    color(letter_color) character_plate(28);
} else if(part == "character_plate_3__") {
    color(letter_color) character_plate(29);
} else if(part == "character_plate_4__") {
    color(letter_color) character_plate(30);
} else if(part == "character_plate_5__") {
    color(letter_color) character_plate(31);
} else if(part == "character_plate_6__") {
    color(letter_color) character_plate(32);
} else if(part == "character_plate_7__") {
    color(letter_color) character_plate(33);
} else if(part == "character_plate_8__") {
    color(letter_color) character_plate(34);
} else if(part == "character_plate_9__") {
    color(letter_color) character_plate(35);
} else if(part == "character_plate_ampersand__") {
    color(letter_color) character_plate(36);
} else if(part == "character_plate_question_mark__") {
    color(letter_color) character_plate(37);
} else if(part == "character_plate_exclamation_point__") {
    color(letter_color) character_plate(38);
} else if(part == "character_plate_comma__") {
    color(letter_color) character_plate(39);
} else if(part == "character_plate_point__") {
    color(letter_color) character_plate(40);
} else if(part == "character_plate_minus__") {
    color(letter_color) character_plate(41);
} else if(part == "character_plate_dollar_sign__") {
    color(letter_color) character_plate(42);
} else if(part == "character_plate_slash__") {
    color(letter_color) character_plate(43);
} else if(part == "character_plate_equals__") {
    color(letter_color) character_plate(44);
} else if(part == "character_plate_plus__") {
    color(letter_color) character_plate(45);
} else if(part == "character_plate_asterisk__") {
    color(letter_color) character_plate(46);
} else if(part == "character_plate_hash__") {
    color(letter_color) character_plate(47);
} else if(part == "character_plate_blank__") {
    color(letter_color) character_plate(48);
} else if(part == "all_parts__") {
    all_parts();
} else {
    all_parts();
}

 // Module Section //
//----------------//

module box() {
    difference() {
        union() {
            rotate([90,0,0]) {
                linear_extrude(height = box_width, convexity = 20) {
                    polygon(
                        points=[
                        /*01*/[0, 0],
                        /*02*/[0, box_depth],
                        /*03*/[box_th + lid_th, box_depth],
                        /*04*/[box_th, box_depth - overall_lid_th],
                        /*05*/[box_th2, box_depth - overall_lid_th],
                        /*06*/[box_th, box_depth - overall_lid_th - box_th3],
                        /*07*/[box_th, box_th],
                        /*08*/[box_height - box_th, box_th],
                        /*09*/[box_height - box_th, box_depth - overall_lid_th - box_th3],
                        /*10*/[box_height - box_th2, box_depth - overall_lid_th],
                        /*11*/[box_height - box_th, box_depth - overall_lid_th],
                        /*12*/[box_height - box_th - lid_th, box_depth],
                        /*13*/[box_height, box_depth],
                        /*14*/[box_height, 0]
                        ]
                    );
                }
            }
            translate([0, -box_th, 0]) {
                cube([box_height, box_th, box_depth - overall_lid_th]);
            }
            translate([0, -box_width, 0]) {
                cube([box_height, box_th, box_depth]);
            }
        }
        translate([box_height/2, -box_width/2, -box_th]){
            cylinder(d = insert_hole_dia, h = box_th3);
        }
        translate([0, -box_width, -1]) {
            round_edges_precut_box(box_height, box_width, box_depth + 2, corner_radius);
        }
    }
    translate([0, -box_width, 0]) {
        round_edges_box(box_height, box_width, box_depth, box_th, overall_lid_th, corner_radius);
    }
}

module lid() {
    difference() {
        union() {
            rotate([90,0,0]) {
                linear_extrude(height = box_width - box_th, convexity = 20) {
                    polygon(
                        points=[
                        /*A*/[0, 0],
                        /*B*/[lid_th, overall_lid_th],
                        /*C*/[lid_th3, overall_lid_th],
                        /*D*/[lid_th2, lid_th],
                        /*E*/[inner_lid_width + lid_th2, lid_th],
                        /*F*/[inner_lid_width + lid_th, overall_lid_th],
                        /*G*/[inner_lid_width + lid_th3, overall_lid_th],
                        /*H*/[inner_lid_width + lid_th4, 0]
                        ]
                    );
                }
            }
            if(sections > 1) {
                for(section = [1:sections - 1]) {
                    translate([(inner_lid_width + lid_th4) / sections * section, 0, lid_th]) {
                        separator();
                    }
                }
            }
            translate([lid_th2, -box_th, 0]) {
                cube([box_height - box_th2 - tolerance2 - lid_th4, box_th, overall_lid_th]);
            }
        }
        translate([-box_th - tolerance, -box_width + box_th, -lid_th]) {
            round_edges_precut_lid(box_height, box_width - box_th, overall_lid_th + 1, corner_radius);
        }
    }
}

module all_parts() {
    color(box_color) box();
    translate([ -box_height - 2, 0, 0]) {
        color(lid_color) lid();
    }
    translate([ -box_height - letter_height - 8, 0, 0]) {
        color(letter_color) all_character_plates(10);
    }
}

module separator() {
    rotate([90,0,0]) {
        linear_extrude(height = box_width - box_th) {
            polygon(
                points=[
                /*  I*/[-lid_th2, 0],
                /* II*/[-lid_th3, mount_th],
                /*III*/[lid_th3, mount_th],
                /* IV*/[lid_th2, 0],
                ]
            );
        }
    }
}

module plate_template() {
    rotate([90,0,0]) {
        linear_extrude(height = letter_width, convexity = 20) {
            polygon(
                points=[
                /*  I*/[0, 0],
                /* II*/[lid_th, mount_th],
                /*III*/[letter_height - lid_th, mount_th],
                /* IV*/[letter_height, 0]
                ]
            );
        }
    }
}

module character_plate(char) {
    union() {
        difference() {
            plate_template();
            if(font == "siren") {
                translate([letter_height * 0.2, -letter_height * char_and_margin_siren[char][1], -0.5]) {
                    rotate([0, 0, 270]) {
                        linear_extrude(height = mount_th + 1) {
                            text(text = char_and_margin_siren[char][0], size = letter_height * 0.6, font = google_font_siren, language = "en");
                        }
                    }
                }
            } else if(font == "stardos") {
                translate([letter_height * 0.2, -letter_height * char_and_margin_stardos[char][1], -0.5]) {
                    rotate([0, 0, 270]) {
                        linear_extrude(height = mount_th + 1) {
                            text(text = char_and_margin_stardos[char][0], size = letter_height * 0.6, font = google_font_stardos, language = "en");
                        }
                    }
                }
            }
        }
        if(char_and_margin_stardos[char][0] == "#" && font == "stardos") {
            translate([letter_height / 2, -letter_width, 0]) {
                cube([0.5,letter_width, mount_th]);
            }
        }
    }
}

module all_character_plates(chars_per_line) {
    for(x = [0:ceil(len(char_and_margin_siren) / chars_per_line - 1)]) {
        for(y = [0:chars_per_line - 1]) {
            translate([-x * (letter_height + 1), -y * (letter_width + 1), 0]) {
                if(y + (x * chars_per_line) < len(char_and_margin_siren)) {
                    character_plate(y + (x * chars_per_line));
                }
            }
        }
    }
}

module round_edges(h, r, box_th, lid_th, edge) {
    difference() {
        cylinder(r = r, h = h);
        translate([0, 0, box_th]) {
            cylinder(r = r - box_th, h = h + 0.2);
        }
        translate([0, r, h]) {
            cube([(r - box_th) * 2, r * 2, lid_th * 2], center = true);
        }
        cut(h, r, edge);
    }
}

module round_edges_precut(h, r, edge) {
    difference() {
        translate([0, 0, h / 2]) {
            cube([r * 2 + 10, r * 2 + 10, h + 1], center = true);
        }
        translate([0, 0, -1]) {
            cylinder(r = r, h = h + 2);
        }
        cut(h, r, edge);
    }
}

module cut(h, r, edge) {
   if(edge == 1) {
        translate([r + 10, 0, h / 2]) {
            cube([r * 2 + 20, r * 2 + 20, h + 2], center = true);
        }
        translate([0, r + 10, h / 2]) {
            cube([r * 2 + 20, r * 2 + 20, h + 2], center = true);
        }
    }
    if(edge == 2) {
        translate([-r - 10, 0, h / 2]) {
            cube([r * 2 + 20, r * 2 + 20, h + 2], center = true);
        }
        translate([0, r + 10, h / 2]) {
            cube([r * 2 + 20, r * 2 + 20, h + 2], center = true);
        }
    }
    if(edge == 3) {
        translate([-r - 10, 0, h / 2]) {
            cube([r * 2 + 20, r * 2 + 20, h + 2], center = true);
        }
        translate([0, -r - 10, h / 2]) {
            cube([r * 2 + 20, r * 2 + 20, h + 2], center = true);
        }
    }
    if(edge == 4) {
        translate([r + 10, 0, h / 2]) {
            cube([r * 2 + 20, r * 2 + 20, h + 2], center = true);
        }
        translate([0, -r - 10, h / 2]) {
            cube([r * 2 + 20, r * 2 + 20, h + 2], center = true);
        }
    }
}

module round_edges_box(x, y, h, box_th, lid_th, r) {
    if(r > 0.0) {
        translate([r, r, 0]) {
            round_edges(h, r, box_th, lid_th, 1);
        }
        translate([x - r, r, 0]) {
            round_edges(h, r, box_th, lid_th, 2);
        }
        translate([x - r, y - r, 0]) {
            round_edges(h, r, box_th, lid_th, 3);
        }
        translate([r, y - r, 0]) {
            round_edges(h, r, box_th, lid_th, 4);
        }
    }
}

module round_edges_precut_box(x, y, h, r) {
    if(r > 0.0) {
        translate([r, r, 0]) {
            round_edges_precut(h, r, 1);
        }
        translate([x - r, r, 0]) {
            round_edges_precut(h, r, 2);
        }
        translate([x - r, y - r, 0]) {
            round_edges_precut(h, r, 3);
        }
        translate([r, y - r, 0]) {
            round_edges_precut(h, r, 4);
        }
    }
}

module round_edges_precut_lid(x, y, h, r) {
    if(r > 0.0) {
        translate([r, r - box_th, 0]) {
            round_edges_precut(h, r - box_th, 1);
        }
        translate([x - r, r - box_th, 0]) {
            round_edges_precut(h, r - box_th, 2);
        }
        translate([x - r, y - r, 0]) {
            round_edges_precut(h, r, 3);
        }
        translate([r, y - r, 0]) {
            round_edges_precut(h, r, 4);
        }
    }
}

```