[User]
I'd like to create a customizable Olympic rings plaque for printing, similar to the example I've seen but with some adjustments for flexibility.

The design should consist of the five interlocking Olympic rings, a base underneath them, and customizable text on the base. I'd like the whole thing to be parametric so I can easily adjust the size and spacing.

Here's a breakdown of what I'm looking for:

**Rings:**

*   **Ring Diameter:** I need a parameter for the outer diameter of the rings. Let's call this `ring_diameter`.
*   **Ring Thickness:**  A parameter to control the thickness of the ring, let's call it `ring_thickness`. This should be used to calculate the inner diameter of each ring.
*   **Ring Count & Arrangement:** The design should always use five rings in the standard Olympic layout (2 on top, 3 on bottom), with correct interlocking (i.e. the rings should "pass through" each other where they overlap). The positions should be calculated automatically based on `ring_diameter` and another parameter for the horizontal distance between rings, let's call it `ring_spacing`.
*   **Ring Height:** The rings should be a specific height above the base, controlled by parameter `ring_height`. The ring height should be above the base.

**Base:**

*   **Base Height:** A parameter, `base_height`, to control the thickness of the base.
*   **Base Shape:** The base should be a rectangle that spans the width of the five rings plus some additional space on either side, using a parameter `base_padding`. It should also have depth under the rings to allow the rings to "sit" and have an outer rim.
*   **Base Support:**  I'd like some supporting posts/teeth on the bottom of the base, spaced evenly along the length. These should be adjustable via `support_width` and `support_count`. The supports should have a small clearance from the base so it can be easily printed.

**Text:**

*   **Text String:** A parameter `text_string` that allows me to specify the text I want.
*   **Text Size:** A parameter `text_size` to control the text's height.
*   **Text Height:** A parameter `text_extrusion_height` to control how far the text extends from the base.
*   **Text Position:** The text should be centered horizontally on the base and should be vertically positioned based on a `text_offset_y` parameter, allowing me to move it further up or down on the base, relative to the base's front edge.

**General Requirements:**

*   All dimensions should be controlled by parameters.
*   The design should be printable without supports.
*   I’d prefer that you use standard OpenSCAD language and no libraries, except for using `linear_extrude` for the text.

Could you create the OpenSCAD file(s) for this design? I'm picturing something similar to the provided example but much more flexible.

[Assistant]
OpenSCAD_Olympics_2016.scad:
```
// Olimpics 2016
// By Magonegro JUL-2016
// Customizer for the Olympics 2016
// Just put them together... or use the customizer before...

// Outer radius of the spring. Determines the overall size:
RADIUS=10;
// Base and overall height. defaults to 5mm:
HEIGHT=6;
// Custom text in the platter:
TEXT="Rio 2016";
// Text size:
TEXTSIZE=10;
// Text height:
TEXTHEIGHT=2;
// To adjust X text pos :
XTEXTOFFSET=0;
// To adjust Y text pos :
YTEXTOFFSET=3;

// [hidden]
RADIUSOUT=1.2*RADIUS; // You can change the factor to a more robust circles here
RADIUSIN=RADIUSOUT*0.8;
SEPARATION=RADIUS/3.6;
SEP=RADIUS+SEPARATION+RADIUSOUT;
XSIZE=SEP*2+2*SEPARATION+2*RADIUS;
// Some calcs
WTH=(-RADIUSOUT*2-RADIUSIN)-(RADIUSOUT*2)-(-RADIUSOUT*2-RADIUSIN-HEIGHT)-(RADIUSOUT*2+RADIUSIN+HEIGHT)-HEIGHT*1.2;
WTI=(-RADIUSOUT*2-RADIUSIN)-(RADIUSOUT*2)-(-RADIUSOUT*2-RADIUSIN-HEIGHT)-(RADIUSOUT*2+RADIUSIN+HEIGHT)*1.2;

module washer(X,Y)
{
    translate([X,Y,0])
    difference()
    {
	cylinder(h=HEIGHT,r=RADIUSOUT,$fn=60);
	cylinder(h=HEIGHT,r=RADIUSIN,$fn=60);
    }
}

union()
{
    washer(0,0);
    washer(-RADIUS-SEPARATION,RADIUS+SEPARATION);
    washer(RADIUS+SEPARATION,RADIUS+SEPARATION);
    washer((RADIUS+SEPARATION)*2,0);
    washer((RADIUS+SEPARATION)*3,RADIUS+SEPARATION);
    translate([-SEP,-RADIUSOUT*2-RADIUSIN,0])
        cube([XSIZE,RADIUSOUT*2,HEIGHT]);
    // Teeth for the base
    translate([-SEP,-RADIUSOUT*2-RADIUSIN-HEIGHT,0])
        cube([XSIZE/5,HEIGHT,HEIGHT]);
    translate([-SEP+(XSIZE/5)*2,-RADIUSOUT*2-RADIUSIN-HEIGHT,0])
        cube([XSIZE/5,HEIGHT,HEIGHT]);
    translate([-SEP+(XSIZE/5)*4,-RADIUSOUT*2-RADIUSIN-HEIGHT,0])
        cube([XSIZE/5,HEIGHT,HEIGHT]);
    // HERE comes the base
    difference()
    {
    translate([-SEP,WTH-2,0])
        cube([XSIZE,RADIUSOUT*2,HEIGHT]);
        union()
        {
        translate([-SEP,WTI+(RADIUSOUT*2)/1.5,0])
            rotate([90,0,0])
                cube([XSIZE/5+0.3,HEIGHT,HEIGHT+0.3]);
        translate([-SEP+(XSIZE/5)*2-0.3,WTI+(RADIUSOUT*2)/1.5,0])
            rotate([90,0,0])
                cube([XSIZE/5+0.6,HEIGHT,HEIGHT+0.3]);
        translate([-SEP+(XSIZE/5)*4-0.3,WTI+(RADIUSOUT*2)/1.5,0])
            rotate([90,0,0])
                cube([XSIZE/5+0.3,HEIGHT,HEIGHT+0.3]);
        }
    }

    translate([-SEP+TEXTSIZE/2+XTEXTOFFSET,-RADIUSOUT*2-YTEXTOFFSET,HEIGHT]) linear_extrude(height = TEXTHEIGHT, convexity = 10)
    // Put your text preferences here acording to your system
        text(TEXT, font = "Arial:style=Black",size=TEXTSIZE);
}
```


[User]
I need a parametric support for NEMA 17 stepper motors. I'm using these on a Prusa i3 Rework, and my motors are a bit shorter than standard, so I want to create a support that reaches the ground, but also doesn't interfere with the motor or its connector. I want to make it easy to modify the dimensions for different NEMA sizes or motor models in the future, and I would like it to be a reasonably clean, printable design.

Here are the specific dimensions that I'm currently using for the first design, and I would like to make them available as parameters within the file, so that I can modify them easily for different motor models.

*   **Support Height:** I want the main support height to be 17.5 mm, not including the skirt below.
*   **Motor Width:** The NEMA 17 has a 42.3 mm width.
*  **Motor Chamfer Width**: The chamfer width of the motor is 33mm.
*   **Skirt Height:** I want the bottom skirt to be 4 mm tall.
*   **Thickness:** The thickness of the base around the motor should be 1 mm. This shows up as the skirt thickness as well.
*   **Connector Width:** The width of the motor's connector is 16 mm.
*   **Shrink Buffer:** Add 0.5 mm as a shrink buffer for the holes, to compensate for material shrinkage during printing.
*   **Hole Buffer:** Add 1 mm as a buffer for the hole shapes, to avoid zero thickness planes.

I need the final model to have a space for the motor to sit in, with the support coming up to the motor body. The skirt should extend beyond the motor body, and there should be a cutout for the motor connector, too.

I'm hoping to use OpenSCAD. Could you create a parametric design in OpenSCAD for me? I would really prefer if the design doesn't depend on any additional libraries like BOSL, BOSL2, etc.

[Assistant]
NEMA_17_Base_Support.scad:
```
/* [Support Dimensions] */
// - Support/padding height (excluding the skirt height)
support_height = 17.5;
// - Width of the motor - 42.3mm for NEMA 17
width = 42.3; // NEMA 17s are 42.3 x 42.3 x motor_height
// - Chamfer width of the motor. Set it to the same as width if the motor body isn't chamfered
chamfer_width = 33;

/* [Skirt Dimensions] */
// - Skirt Height
skirt_height = 4;
// - Thickness in addition to motor dimensions, which primarily shows up as the skirt thickness in the model
thickness = 1;

/* [Connector Dimensions] */
// - Width of the motor connector
connector_width = 16;

/* [Tolerances] */
// - Additional spacing for holes, to compensate for material shrinkage after printing
shrink_buffer = 0.5;
// - Buffer to avoid zero thickness planes in intersections and differences. Doesn't have to be customized in most cases.
hole_buffer = 1; // Hole shapes need to be slightly bigger than the objects they're cutting through

difference(){
    motor_support(width + shrink_buffer, chamfer_width + shrink_buffer, support_height, skirt_height, thickness);
    translate([width / 2, 0, support_height / 2]) {
        connector_hole(connector_width + shrink_buffer, thickness, skirt_height);
    };
}

module connector_hole(width, thickness, height) {
    cube([(thickness * 2) + hole_buffer, width, height + hole_buffer], center = true);
}

module motor_support(width, chamfer_width, support_height, skirt_height, thickness) {
    difference() {
        motor_body(width + (thickness * 2), chamfer_width + (thickness * 2), support_height + skirt_height);
        translate([0, 0, support_height / 2]) {
            motor_body(width, chamfer_width, skirt_height + hole_buffer);
        };
    };
}

module motor_body(width, chamfer_width, height) {
    hull() {
        cube([width, chamfer_width, height], center = true);
        rotate([0, 0, 90]){
            cube([width, chamfer_width, height], center = true);
        };
    };
}

```


[User]
I need a parametric OpenSCAD model of a chair. I've got a basic model already, but it's not very flexible. Here's the existing SCAD code, which makes a chair with very specific dimensions.

```
module object1(scale) {polyhedron(
 points=[[2,0,7.599999904632568],[2,0,0],[2,2,0],[2,0,7.599999904632568],[2,2,0],[2,2,7.599999904632568],[0,9.600000381469727,7.599999904632568],[0,9.600000381469727,0],[2,9.600000381469727,0],[0,9.600000381469727,7.599999904632568],[2,9.600000381469727,0],[2,9.600000381469727,7.599999904632568],[0,9.600000381469727,9.600000381469727],[0,9.600000381469727,20],[0,11.600000381469727,20],[0,9.600000381469727,7.599999904632568],[0,2,7.599999904632568],[0,9.600000381469727,9.600000381469727],[0,0,9.600000381469727],[0,9.600000381469727,9.600000381469727],[0,2,7.599999904632568],[0,9.600000381469727,7.599999904632568],[0,9.600000381469727,9.600000381469727],[0,11.600000381469727,20],[0,0,0],[0,0,9.600000381469727],[0,2,7.599999904632568],[0,0,0],[0,2,7.599999904632568],[0,2,0],[0,9.600000381469727,0],[0,9.600000381469727,7.599999904632568],[0,11.600000381469727,0],[0,11.600000381469727,0],[0,9.600000381469727,7.599999904632568],[0,11.600000381469727,20],[2,0,7.599999904632568],[8,0,7.599999904632568],[10,0,9.600000381469727],[2,0,7.599999904632568],[10,0,9.600000381469727],[0,0,9.600000381469727],[10,0,0],[10,0,9.600000381469727],[8,0,7.599999904632568],[10,0,0],[8,0,7.599999904632568],[8,0,0],[2,0,0],[2,0,7.599999904632568],[0,0,0],[0,0,0],[2,0,7.599999904632568],[0,0,9.600000381469727],[0,0,0],[0,2,0],[2,2,0],[0,0,0],[2,2,0],[2,0,0],[0,9.600000381469727,9.600000381469727],[0,0,9.600000381469727],[10,0,9.600000381469727],[0,9.600000381469727,9.600000381469727],[10,0,9.600000381469727],[10,9.600000381469727,9.600000381469727],[0,2,0],[0,2,7.599999904632568],[2,2,7.599999904632568],[0,2,0],[2,2,7.599999904632568],[2,2,0],[0,9.600000381469727,20],[0,9.600000381469727,9.600000381469727],[10,9.600000381469727,9.600000381469727],[0,9.600000381469727,20],[10,9.600000381469727,9.600000381469727],[10,9.600000381469727,20],[0,9.600000381469727,0],[0,11.600000381469727,0],[2,11.600000381469727,0],[0,9.600000381469727,0],[2,11.600000381469727,0],[2,9.600000381469727,0],[8,11.600000381469727,7.599999904632568],[2,11.600000381469727,7.599999904632568],[0,11.600000381469727,20],[8,11.600000381469727,7.599999904632568],[0,11.600000381469727,20],[10,11.600000381469727,20],[0,11.600000381469727,0],[0,11.600000381469727,20],[2,11.600000381469727,7.599999904632568],[0,11.600000381469727,0],[2,11.600000381469727,7.599999904632568],[2,11.600000381469727,0],[8,11.600000381469727,0],[8,11.600000381469727,7.599999904632568],[10,11.600000381469727,0],[10,11.600000381469727,0],[8,11.600000381469727,7.599999904632568],[10,11.600000381469727,20],[0,11.600000381469727,20],[0,9.600000381469727,20],[10,9.600000381469727,20],[0,11.600000381469727,20],[10,9.600000381469727,20],[10,11.600000381469727,20],[8,0,0],[8,0,7.599999904632568],[8,2,7.599999904632568],[8,0,0],[8,2,7.599999904632568],[8,2,0],[2,2,7.599999904632568],[0,2,7.599999904632568],[0,9.600000381469727,7.599999904632568],[2,2,7.599999904632568],[0,9.600000381469727,7.599999904632568],[2,9.600000381469727,7.599999904632568],[8,0,7.599999904632568],[2,0,7.599999904632568],[2,9.600000381469727,7.599999904632568],[8,2,7.599999904632568],[8,0,7.599999904632568],[2,9.600000381469727,7.599999904632568],[8,2,7.599999904632568],[2,9.600000381469727,7.599999904632568],[2,11.600000381469727,7.599999904632568],[8,2,7.599999904632568],[2,11.600000381469727,7.599999904632568],[8,11.600000381469727,7.599999904632568],[10,2,7.599999904632568],[8,2,7.599999904632568],[8,9.600000381469727,7.599999904632568],[10,2,7.599999904632568],[8,9.600000381469727,7.599999904632568],[10,9.600000381469727,7.599999904632568],[8,9.600000381469727,0],[8,9.600000381469727,7.599999904632568],[8,11.600000381469727,7.599999904632568],[8,9.600000381469727,0],[8,11.600000381469727,7.599999904632568],[8,11.600000381469727,0],[2,9.600000381469727,7.599999904632568],[2,9.600000381469727,0],[2,11.600000381469727,0],[2,9.600000381469727,7.599999904632568],[2,11.600000381469727,0],[2,11.600000381469727,7.599999904632568],[8,2,0],[8,2,7.599999904632568],[10,2,7.599999904632568],[8,2,0],[10,2,7.599999904632568],[10,2,0],[10,2,0],[10,0,0],[8,0,0],[10,2,0],[8,0,0],[8,2,0],[8,9.600000381469727,7.599999904632568],[8,9.600000381469727,0],[10,9.600000381469727,0],[8,9.600000381469727,7.599999904632568],[10,9.600000381469727,0],[10,9.600000381469727,7.599999904632568],[10,11.600000381469727,20],[10,9.600000381469727,20],[10,9.600000381469727,9.600000381469727],[10,2,7.599999904632568],[10,9.600000381469727,7.599999904632568],[10,9.600000381469727,9.600000381469727],[10,11.600000381469727,20],[10,9.600000381469727,9.600000381469727],[10,9.600000381469727,7.599999904632568],[10,2,7.599999904632568],[10,9.600000381469727,9.600000381469727],[10,0,9.600000381469727],[10,11.600000381469727,0],[10,11.600000381469727,20],[10,9.600000381469727,7.599999904632568],[10,11.600000381469727,0],[10,9.600000381469727,7.599999904632568],[10,9.600000381469727,0],[10,2,0],[10,2,7.599999904632568],[10,0,0],[10,0,0],[10,2,7.599999904632568],[10,0,9.600000381469727],[8,9.600000381469727,0],[8,11.600000381469727,0],[10,11.600000381469727,0],[8,9.600000381469727,0],[10,11.600000381469727,0],[10,9.600000381469727,0] ],
faces=[[0,1,2],[3,4,5],[6,7,8],[9,10,11],[12,13,14],[15,16,17],[18,19,20],[21,22,23],[24,25,26],[27,28,29],[30,31,32],[33,34,35],[36,37,38],[39,40,41],[42,43,44],[45,46,47],[48,49,50],[51,52,53],[54,55,56],[57,58,59],[60,61,62],[63,64,65],[66,67,68],[69,70,71],[72,73,74],[75,76,77],[78,79,80],[81,82,83],[84,85,86],[87,88,89],[90,91,92],[93,94,95],[96,97,98],[99,100,101],[102,103,104],[105,106,107],[108,109,110],[111,112,113],[114,115,116],[117,118,119],[120,121,122],[123,124,125],[126,127,128],[129,130,131],[132,133,134],[135,136,137],[138,139,140],[141,142,143],[144,145,146],[147,148,149],[150,151,152],[153,154,155],[156,157,158],[159,160,161],[162,163,164],[165,166,167],[168,169,170],[171,172,173],[174,175,176],[177,178,179],[180,181,182],[183,184,185],[186,187,188],[189,190,191],[192,193,194],[195,196,197]]);}

object1(1);

```

The chair's basic dimensions are approximately:

*   Height: 1000mm
*   Width: 500mm
*   Depth: 580mm

I'd like the new model to be fully parametric, so I can adjust all of the dimensions. Specifically, I'd like to be able to set:

*   **Overall Height**: Total height of the chair from the floor to the top of the backrest.
*   **Seat Height**: Height of the seat from the floor.
*   **Seat Depth**:  Depth of the seat.
*    **Seat Width**:  Width of the seat.
*   **Backrest Height**: Height of the backrest from the seat.
*   **Backrest Angle**: Angle of the backrest relative to vertical.
*  **Leg Thickness**:  Thickness of the chair legs.

I'd also like to be able to control the overall style a bit. I'm envisioning at least two options:

*   **Simple Legs**: Legs are simple vertical posts.
*   **Tapered Legs**: Legs taper from top to bottom.

For the backrest, I'd also like some flexibility:

*   **Simple Backrest**: A flat backrest panel.
*   **Slatted Backrest**: A backrest made of vertical slats.

Finally, I'd like the model to use the BOSL2 library if it makes sense to simplify the code.  I think using the library is appropriate for things like defining the shapes and using transformations.

Could you generate the parametric OpenSCAD model, please?


[User]
Okay, I'm looking to design a magnetic spring using OpenSCAD, and I need it to be parametric so I can adjust it for different magnet sizes. I have a rough concept based on a design I found, but I need a complete, customizable model.

The core idea is to use two cylindrical magnets with opposite magnetic orientations to create a repulsive force, effectively acting as a spring. The design should consist of two main parts: a piston and a holder. The piston will house one magnet, and the holder will house the other. There should also be an additional part for fixing each magnet in its respective housing. All parts should be designed to be 3D-printable.

Here's a breakdown of the parameters I'd like to be able to control:

*   **`RADIUS_IN`**: Radius of the piston.
*   **`HEIGHT_IN`**: Height of the piston.
*   **`MAGHEIGHT`**: Height of the cylindrical magnets.
*   **`MAGRADIUS`**: Radius of the cylindrical magnets.
*   **`RADIUS_OUT`**: Radius of the holder.
*   **`HEIGHT_OUT`**: Height of the holder.
*   **`BASEHEIGHT_OUT`**: Height of the holder's base.
*   **`FACETS`**: Number of facets for circles/cylinders (resolution).
*   **`TOLERANCE`**:  Tolerance for fitting parts together (e.g. space between the piston and holder).

The piston should have a cylindrical body with a recess to fit one magnet.  There should be an additional cylinder part that glues to this main piston part to hold the magnet in place. The holder should have an outer cylinder and a central hole for the piston to move within, as well as a base to stand on. The holder also needs a recess in its base to house its magnet. Finally, there needs to be another cylinder part that glues into the base to hold the magnet in place.

I need the output to be two parts that I can print separately. I also plan on using glue to hold the magnets in their designated places, hence the separate parts for securing them.

Could you generate the OpenSCAD code for this? I'd prefer if it used reasonably standard OpenSCAD practices and didn't require any external libraries like MCAD. I want to be able to tweak each of the parameters to refine the model according to the magnets that I'll be using.

[Assistant]
Magnetic_spring.scad:
```
// Custom magnetic spring
// By Magonegro JUL-2016
// Uses two cylindrical magnets placed in opposite magnetic orientation.
// Depending on the strength of the magnets the spring lenght may vary.
// Insert the magnets and top in the piston and holder and fix them with glue
// You have a working everlasting magnetic spring.

// Piston parameters
// Radius for the piston:
RADIUS_IN=5;
// Height of the piston:
HEIGHT_IN=15;
// Magnet height
MAGHEIGHT=3;
// Magnet radius
MAGRADIUS=3;
// Holder radius:
RADIUS_OUT=8;
// Holder height
HEIGHT_OUT=25;
// Holder base height
BASEHEIGHT_OUT=10;
// Resolution
FACETS=30;
// Tolerance (0.2mm typ)
TOLERANCE=0.2;

// Piston
translate([RADIUS_OUT+RADIUS_IN+2,0,0])
    {
    difference()
        {
        cylinder(r=RADIUS_IN,h=HEIGHT_IN,$fn=FACETS);
        translate([0,0,2]) cylinder(r=MAGRADIUS+TOLERANCE,h=HEIGHT_IN-2,$fn=FACETS);
        }
    }

// Part to fix the magnet to the piston
translate([RADIUS_OUT+2*RADIUS_IN+2+MAGRADIUS+2,0,0])
    {
    cylinder(r=MAGRADIUS,h=HEIGHT_IN-2-MAGHEIGHT,$fn=FACETS);
    }

// Holder
union()
{
    difference()
    {
        cylinder(r=RADIUS_OUT,h=HEIGHT_OUT,$fn=FACETS);
        cylinder(r=RADIUS_IN+TOLERANCE,h=HEIGHT_OUT,$fn=FACETS);
    }
    difference()
    {
    cylinder(r=RADIUS_OUT,h=BASEHEIGHT_OUT,$fn=FACETS);
    cylinder(r=MAGRADIUS+TOLERANCE,h=BASEHEIGHT_OUT-2,$fn=FACETS);
    }
}

// To fix the magnet to the holder
translate([-RADIUS_OUT-MAGRADIUS-2,0,0])
    {
    cylinder(r=MAGRADIUS,h=BASEHEIGHT_OUT-2-MAGHEIGHT,$fn=FACETS);
    }

```


[User]
I'd like to create a customizable safety flag for firearms, specifically for insertion into the chamber of the barrel to visually indicate it's unloaded. I want it to be parametric so I can easily adjust it to different calibers and cartridge lengths.

The flag will consist of two main parts: a cylindrical "plug" that goes into the chamber and a rectangular "flag" that extends out of the barrel.

The cylinder should be defined by two parameters: `cal_diameter` for the diameter of the cylinder, and `cal_height` for the length of the cylindrical portion. The cylinder should be centered on the Z axis, with the base at z=0.

The rectangular flag will attach to one side of the cylinder. It should be a simple rectangular prism, with its base aligned with the bottom of the cylinder, and on the X axis going away from center. The flag should be defined by the following parameters: `flag_width`, `flag_height` and `flag_thickness`. It should start `flag_offset` on the X-axis away from the center of the cylinder.

I’d like to be able to adjust all of those parameters to fit different types of firearms. The initial version could default to something like a 9mm, so maybe `cal_diameter = 9; cal_height = 19; flag_width = 30; flag_height = 6; flag_thickness = 3; flag_offset = -3;`

I don't need any fancy shaping or anything, just those two basic shapes. Could you generate the OpenSCAD code for this? Also, please include comments within the code to explain each section. I'd also like for $fn to be customizable - so I can increase or decrease the facets for smoother or faster renders.

[Assistant]
SafetyFlag.scad:
```
cal_diameter = 9;
cal_height = 19;
$fn=30;cylinder (r = cal_diameter/2,h = cal_height);
translate ([-30, -3, 0]) cube ([30, 6, 3]);
```


[User]
Hey, I'm looking for an OpenSCAD design for a replacement fender cap, specifically for SKS-style bicycle fenders. I've got a basic idea of what it should look like, and I'd like to make it parametric so I can easily adjust it later.

Essentially, the cap should have a cylindrical section that inserts into the fender, and a rectangular section that rests against the outside of the fender. I want to include a hole through the center for a fender rod. Additionally, the rectangular part will have a circular cut-out on the side that contacts the fender. I've attached my current, very basic, code to use as a starting point. Here are the key dimensions:

*   **Outer Cylinder Diameter (outterDia):** 6mm (the main cylindrical section diameter)
*   **Inner Cylinder Diameter (innerDia):** 3.8mm (hole for the fender rod)
*   **Overall Length (overallLen):** 31.3mm (total length of the cap)
*   **Circular Cutout Diameter (cutOut):** 10mm (diameter of the cutout on the rectangular part)
*   **Rectangular Thickness (rectZ):** 9.5mm (thickness of the rectangular section)
*   **Rectangular Width (rectX):** 18.5mm (width of the rectangular section)
*   **Rectangular Height (rectY):** This should be equal to the Outer Cylinder Diameter - 6mm

Also, the length of the cylindrical part should calculate automatically, so it will fit correctly with the rectangular base.
I also want the cap to be oriented such that the cylinder portion comes out the top.

Finally, I’d like the design to have a module I can call, and the variables defined so I can test it easily.

Could you provide me with an OpenSCAD file that achieves this?

[Assistant]
fender_cap.scad:
```
// SKS fender caps
/*[Fender Cap]*/
//Outer Diameter of Cap
outterDia = 6;
//Inner diameter for rod
innerDia = 3.8;
//Entire length
overallLen = 31.3;
//Diameter of circular cutout
cutOut = 10;
//Thickness
rectZ = 9.5;
//Width
rectX = 18.5;

/*[Hidden]*/
rectY = outterDia;
cubeDim = [rectX, rectY, rectZ];
length = overallLen - rectZ - outterDia/2;

module assemble() {
  rotate([90, 0, 0])
  difference() {
    union() {
      cylinder(r = outterDia/2, h = length, center = true, $fn = 36);
      translate([0, 0, length/2*.999])
        sphere(r = outterDia/2, center = true, $fn = 36);
      translate([0, 0, -length/2-cubeDim[2]/2])
        rect();
    }
    translate([0, 0, -rectZ/2])
      cylinder(r = innerDia/2, h = (overallLen - outterDia/2)*1.001 , center = true, $fn = 36);
  }
}

module rect() {
  difference() {
      cube(cubeDim, center = true);
      translate([0, 0, -cubeDim[2]/2])
      rotate([90, 0, 0])
        cylinder(r = cutOut/2, h = cubeDim[1]*1.001, center = true, $fn = 36);

  }
}

for (i = [0:2]) {
  for (j = [0:2]) {
    translate([rectX*i*1.2, overallLen*j*1.2, 0])
      assemble();
  }
}

```


[User]
Hi, I'm looking to create a customizable 3D printable version of the 10PRINT algorithm, similar to the code I've seen, but I need it from scratch.

I want to be able to specify the grid size (both horizontal and vertical cells), and a random seed to control the generated pattern. The pattern should consist of either a forward slash or a backslash shape in each grid cell.

The basic shape to be used for the slashes should be a rounded square (a rectangle with rounded ends). The width and height of the rectangle should be parameters that can be set. I'd like to control the radius of the rounded corners too.

Also, I would like the slashes to be generated via rotation of the rounded rectangle, and not by drawing new geometry, as is sometimes seen in 10print implementations. One will be rotated +45 degrees and the other -45 degrees from the unrotated horizontal/vertical aligned version of the rounded rectangle. I would like the slashes to be generated using `linear_extrude`.

The background should just be a flat cube, slightly larger than the grid, so the generated slashes sit atop it. It would also be nice to specify the background cube's height.

I'd like all of these parameters to be accessible in the OpenSCAD customizer. Could you generate an OpenSCAD file or files that do this?

[Assistant]
10print_customizer.scad:
```
/*

10PRINT for OpenScad (for customizer, no title option)

Fernando Jerez

*/
// preview[view:south, tilt:top]
// Random Seed
seed= 1;

// Number of horizontal cells
gridx = 36;
// Number of vertical cells
gridy = 20;

/* [Hidden] */
$fn = 4;
random = rands(0,1,10000,seed);

w = 2; // width of 'stick'
h = 8; // height of 'stick'
gridsize = h*0.707;

color("Blue")
translate([-0.5*gridsize,-0.5*gridsize,0.5])
    cube([(2+gridx)*gridsize,(2+gridy)*gridsize,1],center=true);

color("White")

translate([-gridsize*gridx/2,-gridsize*gridy/2,1]){
    linear_extrude(1){
        for(x = [0:gridx-1]){
            for(y = [0:gridy-1]){
                translate([x*gridsize,y*gridsize,0]){
                    if(random[x*(gridy-1)+y]>=0.5){
                        rotate([0,0,45]) squareRounded(w,h,1);
                    }else{
                        rotate([0,0,-45]) squareRounded(w,h,1);
                    }
                }
            }
        }
    }
}

module squareRounded(w,h,r){
    w1 = 0.5*w-r;
    h1 = 0.5*h-r;
    union(){
        translate([-w1,-h1,0]) circle(r);
        translate([-w1,h1,0]) circle(r);
        translate([w1,h1,0]) circle(r);
        translate([w1,-h1,0]) circle(r);
        square([w-2*r,h],center=true);
        square([w,h-2*r],center=true);
    }
}
```


[User]
Hey, I'm looking to generate some 3D-printable fabric patterns in OpenSCAD, and I'd love your help putting together the code. I've been playing around with a few ideas, and I'm hoping for something parametric so I can adjust dimensions, thread size, spacing, etc.

The main thing is I want to be able to generate three different fabric weaves: flat, helical, and a special "Y-flex" weave.

For the flat weave, it should look like a classic woven fabric, where the threads undulate sinusoidally in the z-direction as they run along the x and y axes. I need to specify the overall x and y dimensions, the thread diameter, and the minimum clearance between threads.

The helical weave is a bit more complex. It's a crisscross pattern of right-handed and left-handed helices, and these helices should always cross at right angles to each other. I need the same parameters as the flat weave: overall x and y dimensions, thread diameter, and thread clearance.

Lastly, the "Y-flex" weave is a special interlocking pattern of helices running along only the x-direction. It's designed so the resulting fabric can flex easily in the y-direction while being more rigid in x. Again, I need to be able to control overall x and y dimensions, thread diameter, and the minimum clearance between threads.

I would like to have a separate module for each of these fabric types: `MakeFlatFabric`, `MakeHelicalFabric`, and `MakeYFlexFabric`. Each should take `x_len`, `y_len`, `diam`, and `clearance` as parameters. Internally, these modules should be constructed using a `FabricThread` module that handles generating the individual threads using OpenSCAD's `polyhedron` primitive.

Also, I would like a way to generate individual threads. I want a `FabricThread` module that takes the `length`, `diam`, `axial_pitch`, and `radial_clearance` parameters, and an optional `helical` boolean. It should render an octagonal thread profile. When `helical` is true it should generate a helical thread, and when false it should be a flat thread, with points for its octagonal cross-section described in the `FlatThreadPoints` function.

For the flat threads, I'd like a function called `FlatThreadPoints(i, a, z, c, s, u)` which generates the point list of a thread cross section in the z direction at an angle `a*i`.  `i` is the number of steps - 0.5, `z` is the z step, `c` is the clearance to the z axis, `s` is the length of an octagonal side, and `u` is `s / sqrt(2)`.  These parameters are all based upon `diam` and `clearance` which are parameters to `MakeFlatFabric`, `MakeHelicalFabric`, and `MakeYFlexFabric`. For this function there will also need to be helper functions `XZRot` which takes a vector `v` and an angle `ang` and applies a rotation to the vector, `BaseFlat` which calculates the base position of the flat thread, and `FlatAng` which calculates the angle of the flat threads.

For helical threads, I'll need a `HelicalThreadPoints(i, a, z, c, s, u)` function using the same parameters as `FlatThreadPoints` to generate points for a helical thread.

The thread faces should be handled by a `FabricThreadFaces(n)` function, which depends upon a `FabricThreadFacesRec(i)` function which is used to generate the thread faces for each thread. These will be `polyhedron` faces using the points generated in `FlatThreadPoints` or `HelicalThreadPoints`.

Finally, I want to be able to specify the `thread_diam` and `thread_clearance` as global variables, and also have a variable called `fabric_type_123` that allows selecting which fabric type is rendered. I want the values 0, 1, 2 and 3 to represent a "demo" rendering of all three fabric types, a flat fabric, a helical fabric, and a Y-flex fabric, respectively.

I hope this makes sense, let me know if you have any questions.

[Assistant]
fabric.scad:
```
// Created in 2016 by Ryan A. Colyer.
// This work is released with CC0 into the public domain.
// https://creativecommons.org/publicdomain/zero/1.0/
//
// http://www.thingiverse.com/thing:1693052

thread_diam = 1;
thread_clearance = 0.6;
//thread_diam = 1.5;
//thread_clearance = 1.0;
fabric_type_123 = 0;  // [0:Demo, 1:Flat, 2:Helical, 3:YFlex]
x_len = 60;
y_len = 60;

// i = number of steps - 0.5
// a = angle step
// z = z step
// c = clearance to z axis
// s = length of octagonal side, d / (1+sqrt(2))
// u = s / sqrt(2)
function HelicalThreadPoints(i,a,z,c,s,u) = (i<-1) ? [] :
  concat(HelicalThreadPoints(i-1,a,z,c,s,u),
  [
    [(c) * cos(a*i), (c) * sin(a*i), u + i*z],
    [(c+u) * cos(a*i), (c+u) * sin(a*i), 0 + i*z],
    [(c+s+u) * cos(a*i), (c+s+u) * sin(a*i), 0 + i*z],
    [(c+s+2*u) * cos(a*i), (c+s+2*u) * sin(a*i), u + i*z],
    [(c+s+2*u) * cos(a*i), (c+s+2*u) * sin(a*i), s+u + i*z],
    [(c+s+u) * cos(a*i), (c+s+u) * sin(a*i), s+2*u + i*z],
    [(c+u) * cos(a*i), (c+u) * sin(a*i), s+2*u + i*z],
    [(c) * cos(a*i), (c) * sin(a*i), s+u + i*z]
  ]
);

function FabricThreadFacesRec(i) = (i<0) ? [] :
  concat(FabricThreadFacesRec(i-8),
  [
    [i, i+1, i+9], [i+9, i+8, i],
    [i+1, i+2, i+10], [i+10, i+9, i+1],
    [i+2, i+3, i+11], [i+11, i+10, i+2],
    [i+3, i+4, i+12], [i+12, i+11, i+3],
    [i+4, i+5, i+13], [i+13, i+12, i+4],
    [i+5, i+6, i+14], [i+14, i+13, i+5],
    [i+6, i+7, i+15], [i+15, i+14, i+6],
    [i+7, i, i+8], [i+8, i+15, i+7]
  ]
);

function FabricThreadFaces(n) = concat(
  [
    [7,6,5],[5,4,3],[3,2,1],[1,0,7],[7,5,3],[3,1,7],
    [n*8, n*8+1, n*8+2], [n*8+2, n*8+3, n*8+4], [n*8+4, n*8+5, n*8+6],
    [n*8+6, n*8+7, n*8], [n*8,n*8+2,n*8+4], [n*8+4,n*8+6,n*8],
  ], FabricThreadFacesRec(n*8)
);

function XZRot(v, ang) =
  [v[0]*cos(ang)+v[2]*sin(ang), v[1], -v[0]*sin(ang)+v[2]*cos(ang)];

function BaseFlat(i,a,z,c,s,u) = [(c+u+s/2) * cos(a*i), 0, i*z];

function FlatAng(i,a,z,c,s,u) = atan(-(c+u+s/2)*(sin(a*i)+pow(sin(a*i),3))/2);

// i = number of steps - 0.5
// a = angle step
// z = z step
// c = clearance to z axis
// s = length of octagonal side, d / (1+sqrt(2))
// u = s / sqrt(2)
function FlatThreadPoints(i,a,z,c,s,u) = (i<-1) ? [] :
  concat(FlatThreadPoints(i-1,a,z,c,s,u),
  [
    BaseFlat(i,a,z,c,s,u) + XZRot([-s/2-u, -s/2, 0], FlatAng(i,a,z,c,s,u)),
    BaseFlat(i,a,z,c,s,u) + XZRot([-s/2, -s/2-u, 0], FlatAng(i,a,z,c,s,u)),
    BaseFlat(i,a,z,c,s,u) + XZRot([s/2, -s/2-u, 0], FlatAng(i,a,z,c,s,u)),
    BaseFlat(i,a,z,c,s,u) + XZRot([s/2+u, -s/2, 0], FlatAng(i,a,z,c,s,u)),
    BaseFlat(i,a,z,c,s,u) + XZRot([s/2+u, s/2, 0], FlatAng(i,a,z,c,s,u)),
    BaseFlat(i,a,z,c,s,u) + XZRot([s/2, s/2+u, 0], FlatAng(i,a,z,c,s,u)),
    BaseFlat(i,a,z,c,s,u) + XZRot([-s/2, s/2+u, 0], FlatAng(i,a,z,c,s,u)),
    BaseFlat(i,a,z,c,s,u) + XZRot([-s/2-u, s/2, 0], FlatAng(i,a,z,c,s,u))
  ]
);

module FabricThread(length, diam, axial_pitch, radial_clearance, helical=false) {
  // If (thread_diam / thread_clearance) > 15, perloop might need increasing.
  perloop = 16;
  steps = round(perloop * length / axial_pitch);
  point_steps = steps - 0.5;
  angle_step = 360 / perloop;
  z_step = axial_pitch / perloop;
  side_len = diam/(1+sqrt(2));
  angled_len = diam/(sqrt(2)*(1+sqrt(2)));

  points = helical ?
    HelicalThreadPoints(point_steps, angle_step, z_step,
      radial_clearance, side_len, angled_len) :
    FlatThreadPoints(point_steps, angle_step, z_step,
      radial_clearance, side_len, angled_len);
  faces = FabricThreadFaces(steps);

  polyhedron(points=points, faces=faces);
}

module MakeXThreads(x_len, y_len, diam, pitch, clearance, helical=false) {
  count = round(y_len/pitch-1);
  for (i=[1:count]) {
    translate([0, i*pitch, 0])
      scale([1,pow(-1,(i)),pow(-1,(i+1))])
      rotate([0,90,0])
      FabricThread(x_len, diam, 2*pitch, clearance/2, helical);
  }
}

module MakeYThreads(x_len, y_len, diam, pitch, clearance, helical=false) {
  count = round(x_len/pitch-1);
  for (i=[1:count]) {
    translate([(i)*pitch, 0, 0])
      scale([pow(-1,(i)),1,pow(-1,(i))])
      rotate([0,90,90])
      FabricThread(y_len, diam, 2*pitch, clearance/2, helical);
  }
}

// Creates a flat fabric weave with overall fabric dimensions of x_len by
// y_len.  Each thread has a diameter of diam, and the threads print with a
// minimum distance between each other of approximately clearance.
module MakeFlatFabric(x_len, y_len, diam, clearance) {
  thread_xy_pitch = sqrt(pow((diam + 2*clearance),2) - pow(clearance,2)) + diam;
  translate([0, 0, diam + clearance/2]) {
    MakeXThreads(x_len, y_len, diam, thread_xy_pitch, clearance);
    MakeYThreads(x_len, y_len, diam, thread_xy_pitch, clearance);
  }
}

// Creates a helical/counterhelical fabric weave with overall fabric dimensions
// of x_len by y_len.  Each thread has a diameter of diam, and the threads
// print with a minimum distance between each other of approximately clearance.
module MakeHelicalFabric(x_len, y_len, diam, clearance) {
  thread_xy_pitch = 2*diam + 2*clearance;
  translate([0, 0, diam + clearance]) {
    translate([-diam/2,diam/2, 0])
      MakeXThreads(x_len, y_len, diam, thread_xy_pitch, clearance, true);
    MakeYThreads(x_len, y_len, diam, thread_xy_pitch, clearance, true);
  }
}

// Creates an interlocking x-oriented helical weave with overall fabric
// dimensions of x_len by y_len.  Each thread has a diameter of diam, and the
// threads print with a minimum distance between each other of approximately
// clearance.  This pattern naturally flexes and stretches well in the y
// direction as generated, while being more rigid in the x direction.
module MakeYFlexFabric(x_len, y_len, diam, clearance) {
  int_thread_clearance = 0.5*diam+clearance;
  thread_xy_pitch = diam+clearance;
  count = round(y_len/thread_xy_pitch-1);
  translate([0, 0, diam + int_thread_clearance]) {
    for (i=[1:count]) {
      translate([0, i*thread_xy_pitch, 0])
        scale([1,pow(-1,(i)),pow(-1,(i+1))])
        rotate([0,90,0])
        FabricThread(x_len, diam, (3*diam+3*clearance)*sqrt(2),
          int_thread_clearance, helical=true);
    }
  }
}

if (fabric_type_123 == 1) {
  MakeFlatFabric(x_len, y_len, thread_diam, thread_clearance);
}

else if (fabric_type_123 == 2) {
  MakeHelicalFabric(x_len, y_len, thread_diam, thread_clearance);
}

else if (fabric_type_123 == 3) {
  MakeYFlexFabric(x_len, y_len, thread_diam, thread_clearance);
}

else {
  translate([-10-x_len, 0, 0])
    MakeFlatFabric(x_len, y_len, thread_diam, thread_clearance);
  translate([-10-x_len, -10-y_len, 0])
    MakeHelicalFabric(x_len, y_len, thread_diam, thread_clearance);
  translate([0, -10-y_len, 0])
    MakeYFlexFabric(x_len, y_len, thread_diam, thread_clearance);
  translate([0,30,0]) text("fabric_type_123 =", size=x_len/11);
  translate([0,20,0]) text("    1 for Flat", size=x_len/11);
  translate([0,10,0]) text("    2 for Helical", size=x_len/11);
  text("    3 for Y-Flex", size=x_len/11);
}

```
fabric_v2.scad:
```
// Created in 2016 by Ryan A. Colyer.
// This work is released with CC0 into the public domain.
// https://creativecommons.org/publicdomain/zero/1.0/
//
// https://www.thingiverse.com/thing:1693052

thread_diam = 1;
thread_clearance = 0.6;
//thread_diam = 1.5;
//thread_clearance = 1.0;
fabric_type_123 = 0;  // [0:Demo, 1:Flat, 2:Helical, 3:YFlex]
x_len = 60;
y_len = 60;

// i = number of steps - 0.5
// a = angle step
// z = z step
// c = clearance to z axis
// s = length of octagonal side, d / (1+sqrt(2))
// u = s / sqrt(2)
function HelicalThreadPoints(i,a,z,c,s,u) = (i<-1) ? [] :
  concat(HelicalThreadPoints(i-1,a,z,c,s,u),
  [
    [(c) * cos(a*i), (c) * sin(a*i), u + i*z],
    [(c+u) * cos(a*i), (c+u) * sin(a*i), 0 + i*z],
    [(c+s+u) * cos(a*i), (c+s+u) * sin(a*i), 0 + i*z],
    [(c+s+2*u) * cos(a*i), (c+s+2*u) * sin(a*i), u + i*z],
    [(c+s+2*u) * cos(a*i), (c+s+2*u) * sin(a*i), s+u + i*z],
    [(c+s+u) * cos(a*i), (c+s+u) * sin(a*i), s+2*u + i*z],
    [(c+u) * cos(a*i), (c+u) * sin(a*i), s+2*u + i*z],
    [(c) * cos(a*i), (c) * sin(a*i), s+u + i*z]
  ]
);

function FabricThreadFacesRec(i) = (i<0) ? [] :
  concat(FabricThreadFacesRec(i-8),
  [
    [i, i+1, i+9], [i+9, i+8, i],
    [i+1, i+2, i+10], [i+10, i+9, i+1],
    [i+2, i+3, i+11], [i+11, i+10, i+2],
    [i+3, i+4, i+12], [i+12, i+11, i+3],
    [i+4, i+5, i+13], [i+13, i+12, i+4],
    [i+5, i+6, i+14], [i+14, i+13, i+5],
    [i+6, i+7, i+15], [i+15, i+14, i+6],
    [i+7, i, i+8], [i+8, i+15, i+7]
  ]
);

function FabricThreadFaces(n) = concat(
  [
    [7,6,5],[5,4,3],[3,2,1],[1,0,7],[7,5,3],[3,1,7],
    [n*8, n*8+1, n*8+2], [n*8+2, n*8+3, n*8+4], [n*8+4, n*8+5, n*8+6],
    [n*8+6, n*8+7, n*8], [n*8,n*8+2,n*8+4], [n*8+4,n*8+6,n*8],
  ], FabricThreadFacesRec((n-1)*8)
);

function XZRot(v, ang) =
  [v[0]*cos(ang)+v[2]*sin(ang), v[1], -v[0]*sin(ang)+v[2]*cos(ang)];

function BaseFlat(i,a,z,c,s,u) = [(c+u+s/2) * cos(a*i), 0, i*z];

function FlatAng(i,a,z,c,s,u) = atan(-(c+u+s/2)*(sin(a*i)+pow(sin(a*i),3))/2);

// i = number of steps - 0.5
// a = angle step
// z = z step
// c = clearance to z axis
// s = length of octagonal side, d / (1+sqrt(2))
// u = s / sqrt(2)
function FlatThreadPoints(i,a,z,c,s,u) = (i<-1) ? [] :
  concat(FlatThreadPoints(i-1,a,z,c,s,u),
  [
    BaseFlat(i,a,z,c,s,u) + XZRot([-s/2-u, s/2, 0], FlatAng(i,a,z,c,s,u)),
    BaseFlat(i,a,z,c,s,u) + XZRot([-s/2, s/2+u, 0], FlatAng(i,a,z,c,s,u)),
    BaseFlat(i,a,z,c,s,u) + XZRot([s/2, s/2+u, 0], FlatAng(i,a,z,c,s,u)),
    BaseFlat(i,a,z,c,s,u) + XZRot([s/2+u, s/2, 0], FlatAng(i,a,z,c,s,u)),
    BaseFlat(i,a,z,c,s,u) + XZRot([s/2+u, -s/2, 0], FlatAng(i,a,z,c,s,u)),
    BaseFlat(i,a,z,c,s,u) + XZRot([s/2, -s/2-u, 0], FlatAng(i,a,z,c,s,u)),
    BaseFlat(i,a,z,c,s,u) + XZRot([-s/2, -s/2-u, 0], FlatAng(i,a,z,c,s,u)),
    BaseFlat(i,a,z,c,s,u) + XZRot([-s/2-u, -s/2, 0], FlatAng(i,a,z,c,s,u))
  ]
);

module FabricThread(length, diam, axial_pitch, radial_clearance, helical=false) {
  // If (thread_diam / thread_clearance) > 15, perloop might need increasing.
  perloop = 16;
  steps = round(perloop * length / axial_pitch);
  point_steps = steps - 0.5;
  //point_steps = steps;
  angle_step = 360 / perloop;
  z_step = axial_pitch / perloop;
  side_len = diam/(1+sqrt(2));
  angled_len = diam/(sqrt(2)*(1+sqrt(2)));

  points = helical ?
    HelicalThreadPoints(point_steps, angle_step, z_step,
      radial_clearance, side_len, angled_len) :
    FlatThreadPoints(point_steps, angle_step, z_step,
      radial_clearance, side_len, angled_len);
  faces = FabricThreadFaces(steps);

  polyhedron(points=points, faces=faces);
}

module MakeXThreads(x_len, y_len, diam, pitch, clearance, helical=false) {
  count = round(y_len/pitch-1);
  for (i=[1:count]) {
    translate([0, i*pitch, 0])
      scale([1,pow(-1,(i)),pow(-1,(i+1))])
      rotate([0,90,0])
      FabricThread(x_len, diam, 2*pitch, clearance/2, helical);
  }
}

module MakeYThreads(x_len, y_len, diam, pitch, clearance, helical=false) {
  count = round(x_len/pitch-1);
  for (i=[1:count]) {
    translate([(i)*pitch, 0, 0])
      scale([pow(-1,(i)),1,pow(-1,(i))])
      rotate([0,90,90])
      FabricThread(y_len, diam, 2*pitch, clearance/2, helical);
  }
}

// Creates a flat fabric weave with overall fabric dimensions of x_len by
// y_len.  Each thread has a diameter of diam, and the threads print with a
// minimum distance between each other of approximately clearance.
module MakeFlatFabric(x_len, y_len, diam, clearance) {
  thread_xy_pitch = sqrt(pow((diam + 2*clearance),2) - pow(clearance,2)) + diam;
  translate([0, 0, diam + clearance/2]) {
    MakeXThreads(x_len, y_len, diam, thread_xy_pitch, clearance);
    MakeYThreads(x_len, y_len, diam, thread_xy_pitch, clearance);
  }
}

// Creates a helical/counterhelical fabric weave with overall fabric dimensions
// of x_len by y_len.  Each thread has a diameter of diam, and the threads
// print with a minimum distance between each other of approximately clearance.
module MakeHelicalFabric(x_len, y_len, diam, clearance) {
  thread_xy_pitch = 2*diam + 2*clearance;
  translate([0, 0, diam + clearance]) {
    translate([-diam/2,diam/2, 0])
      MakeXThreads(x_len, y_len, diam, thread_xy_pitch, clearance, true);
    MakeYThreads(x_len, y_len, diam, thread_xy_pitch, clearance, true);
  }
}

// Creates an interlocking x-oriented helical weave with overall fabric
// dimensions of x_len by y_len.  Each thread has a diameter of diam, and the
// threads print with a minimum distance between each other of approximately
// clearance.  This pattern naturally flexes and stretches well in the y
// direction as generated, while being more rigid in the x direction.
module MakeYFlexFabric(x_len, y_len, diam, clearance) {
  int_thread_clearance = 0.5*diam+clearance;
  thread_xy_pitch = diam+clearance;
  count = round(y_len/thread_xy_pitch-1);
  translate([0, 0, diam + int_thread_clearance]) {
    for (i=[1:count]) {
      translate([0, i*thread_xy_pitch, 0])
        scale([1,pow(-1,(i)),pow(-1,(i+1))])
        rotate([0,90,0])
        FabricThread(x_len, diam, (3*diam+3*clearance)*sqrt(2),
          int_thread_clearance, helical=true);
    }
  }
}

if (fabric_type_123 == 1) {
  MakeFlatFabric(x_len, y_len, thread_diam, thread_clearance);
}

else if (fabric_type_123 == 2) {
  MakeHelicalFabric(x_len, y_len, thread_diam, thread_clearance);
}

else if (fabric_type_123 == 3) {
  MakeYFlexFabric(x_len, y_len, thread_diam, thread_clearance);
}

else {
  translate([-10-x_len, 0, 0])
    MakeFlatFabric(x_len, y_len, thread_diam, thread_clearance);
  translate([-10-x_len, -10-y_len, 0])
    MakeHelicalFabric(x_len, y_len, thread_diam, thread_clearance);
  translate([0, -10-y_len, 0])
    MakeYFlexFabric(x_len, y_len, thread_diam, thread_clearance);
  if ($preview) {
    linear_extrude(1) {
      translate([0,30]) text("fabric_type_123 =", size=x_len/11);
      translate([0,20]) text("    1 for Flat", size=x_len/11);
      translate([0,10]) text("    2 for Helical", size=x_len/11);
      text("    3 for Y-Flex", size=x_len/11);
    }
  }
}

```


[User]
Okay, I'm trying to design a modular shelving system, and I've seen some cool connectors that I'd like to adapt and expand upon. I'm looking for a parametric OpenSCAD design that will allow me to create different parts for it.

Specifically, I need a main connector piece and a door hinge piece that can be combined. The core idea is to have these connectors slide onto the edges of panels (think cardboard, plexiglass, thin wood, etc) to form a rigid structure. I need to be able to adjust the thickness of the panels these connectors attach to, as well as adjust the overall dimensions of the connector itself.

For the main connector, it should basically be a rectangular block with a slot down the center that the panel edge slides into. The slot will have slightly more space than the panel to ensure it fits. It will also need a hole running perpendicularly through its length, for a thin filament to be inserted to lock the panels in place.

The door hinge should be designed in a way where it slots onto the same panel, with a cylindrical section extending perpendicular, so that it can be used as a hinge when another panel is connected via a similar connector. There needs to be space for a securing filament, just like the main connector.

Can you create these two parts as separate OpenSCAD modules, and make sure all the critical dimensions are easily adjustable via parameters? I'm thinking parameters like `thickness_of_desks` (thickness of the panels), `thickness_of_walls` (wall thickness of the connector), `length_of_connectors`, `width_of_connectors`, and `secure_filament_thickness`. The `secure_filament_thickness` should be slightly less than the diameter of the hole it will be inserted into. It'd be nice to have an additional parameter controlling the length of the hinge pin too. I'm not requesting any external libraries.

[Assistant]
door_hinge.scad:
```

//celkovy cas - 3:11

//variablength_of_connectors
/* [Hidden] */
//fragment number
$fn = 100;

/* [Main] */
//thickness of desks in mm
thickness_of_desks=5;
//thickness of walls in mm
thickness_of_walls = 1.2;
//length of connectors in mm
length_of_connectors = 25;
//width of connectors in mm
width_of_connectors = 20;

secure_filament_thickness = 1.75; //[1.75,3.0]

connector();

translate([thickness_of_desks/2+thickness_of_walls+length_of_connectors/2,thickness_of_desks/2+thickness_of_walls+width_of_connectors/2,0])rotate([-90,0,90])difference(){
union(){
cylinder(h=length_of_connectors/2, d=thickness_of_walls+thickness_of_walls+thickness_of_desks);
translate([-(thickness_of_desks+thickness_of_walls+thickness_of_walls)/2,-(thickness_of_desks+thickness_of_walls+thickness_of_walls)/2,0])cube([thickness_of_walls+thickness_of_desks/2,thickness_of_desks+thickness_of_walls+thickness_of_walls,length_of_connectors/2]);
}    cylinder(h=length_of_connectors/2, d=thickness_of_desks+3*thickness_of_walls/4);
}

module connector(){
    translate([(thickness_of_desks+(thickness_of_walls*2))/2,-width_of_connectors/2,-(thickness_of_desks+(thickness_of_walls*2))/2])difference(){
cube([length_of_connectors,width_of_connectors,thickness_of_desks+(thickness_of_walls*2)]);
translate([0,-thickness_of_walls,thickness_of_walls-0.1])cube([length_of_connectors,width_of_connectors,thickness_of_desks+0.2]);
translate([length_of_connectors/2,width_of_connectors/2,0])cylinder(h=thickness_of_desks+(thickness_of_walls*2), d=secure_filament_thickness );
}

}

module arc(){
translate([(0.1+(length_of_connectors/2)-secure_filament_thickness)+thickness_of_desks/2,width_of_connectors/2,-((0.1+(length_of_connectors/2)-secure_filament_thickness)+thickness_of_desks/2)])rotate([90,270,0])difference(){
intersection(){
union(){
cylinder(h=width_of_connectors, r = (length_of_connectors/2)-secure_filament_thickness);
cube([(length_of_connectors/2)-secure_filament_thickness,(length_of_connectors/2)-secure_filament_thickness,thickness_of_walls]);
}
cube([(length_of_connectors/2)-secure_filament_thickness,(length_of_connectors/2)-secure_filament_thickness,width_of_connectors]);
}
cylinder(h=width_of_connectors, r = (length_of_connectors/2)-(secure_filament_thickness+thickness_of_walls-0.1));
}
}
module hinges(){
translate([3+thickness_of_desks/2+0.1,0,length_of_connectors-7.5+secure_filament_thickness/2])difference(){
union(){
cylinder(h=5, d=5);
translate([-3,-2.5,0])cube([3,5,5]);
}    cylinder(h=5, d=3);
}

}

```


[User]
Okay, I'm looking to design a modular shelving system, and I need a connector piece similar to the one described in the provided text. I want a parametric OpenSCAD model for this.

The core design is a cylindrical handle section with a flared base, and then a separate piece that connects to a shelf or panel. Here's a breakdown of what I need:

**Handle Section:**

*   It should have a main cylindrical section that acts as the actual handle. I think in the original it's 5mm tall.
*   The base of the handle needs to flare out. In the existing SCAD, this is achieved with a larger cylinder, plus a rotated extrusion to create a rounded edge. I like this effect, so it should be replicated. There should be a step in height between the main cylinder and the flared base. This is where the step between diameters will be.
*   The flared base itself has a rounded edge, which is created by another rotated extrusion.

**Panel Connection Section:**

*   This section is separate from the handle and connects to the panel. This looks to be comprised of two cylinders in the original, and a connector for each.
*   It needs to have at least two small cylindrical pegs that extend into the panel. There should be a flat part that sits against the panel on the inside, with a center hole.
*   The pegs should be adjustable in diameter and distance from each other for various types of panels.
*   The cylinders should be able to adjust in height based on the thickness of the shelf.

**Parameters I need to control:**

*   `thickness_of_desks` (or `panel_thickness` perhaps?): Thickness of the material the pegs connect to.
*   `diameter`: Diameter of the main cylindrical handle.
*   `secure_filament_thickness` (or `peg_diameter`): Diameter of the pegs that attach to the panel.
*   `handle_height`: The total height of the handle part, including the base.
*   `base_flare_height`: The height of the flared base, measured from the base of the handle to the very bottom of the curve.
*   `base_diameter_offset`: The diameter difference between the handle diameter and the base diameter,
*   `peg_offset`: Distance from the center of the peg cylinders to the center of the connector cylinder.
*   `peg_flat_height`: Height of the flat part of the connector cylinder before the start of the peg cylinders.

I think the most important thing is to make all of these parametric and easily adjustable so I can customize the design for different panel thicknesses and handle sizes.

For this, I'd need two different `scad` files - one for the main handle, and one for the panel connection. If there are any standard libraries I need, please include them in the code. Otherwise, I believe this can be achieved with just the standard OpenSCAD functionality.

[Assistant]
drawer_handle_v2.scad:
```
//zacatek-0:08
//konec - 0:37
//variables

/* [Hidden] */
//fragment number
$fn = 100;

/* [Main] */
//thickness of desks in mm
thickness_of_desks = 4;
//diameter of handle
diameter = 25;
secure_filament_thickness = 4; //[3:5]

difference(){
union(){
cylinder(h=5, d=diameter);
translate([0,0,1.5])
cylinder(h=10, d=diameter+3);
translate([0,0,1.5])rotate_extrude()translate([diameter/2,0,0])circle(d=3);}
translate([0,0,3])rotate_extrude()translate([diameter/2+2.6,0,0])circle(d=3);}
difference(){
translate([diameter+4,0,0])cylinder(h=1, d=diameter+3);
translate([diameter+4,10,-1])
cylinder(h=thickness_of_desks+3, d=secure_filament_thickness);
translate([diameter+4,-10,-1])
cylinder(h=thickness_of_desks+3, d=secure_filament_thickness);
}
translate([0,10,10])
cylinder(h=thickness_of_desks+3, d=secure_filament_thickness);
translate([0,-10,10])
cylinder(h=thickness_of_desks+3, d=secure_filament_thickness);
```


[User]
I need an OpenSCAD design for a custom bit to remove oval-headed screws from a Nespresso machine. I've got a few things I'd like to be able to control:

First, I need the bit to fit the screw head. I measured the screw head and it's about 3.3mm wide at its widest point. I also need to account for printer accuracy, so I'd like a parameter called `margin` that I can adjust, with a default of 0.1mm. This `margin` should be added to the screw head width. The screw head is also about 1mm thick.

Second, I want a handle, and I'd like to be able to choose if it has a groove or not. So, I need a boolean parameter called `shapedHandle` that defaults to `true`. If `shapedHandle` is true, the handle should have a sort of ergonomic shape with a groove. If `shapedHandle` is false, it should just be a straight cylinder.

Finally, the handle should have a number of sides. This should be a parameter called `sides`, and it defaults to 16. This should control the number of sides on all the cylindrical parts of the handle.

I'd like the total length of the tool to be about 30mm, and the diameter of the handle to be about 8mm for the widest part. The bit part should extend about 1mm down from the start of the handle. If there is a groove, I want the groove to extend up about 10mm from the start of the handle and the handle to have a diameter of about 7mm where the groove is, and about 8mm everywhere else. If there is no groove, the handle should just be a straight cylinder that is 8mm in diameter. The bit portion that fits into the screw should be based on the `screw_head` module described above. Also, it may be helpful to provide a module for the screw_head itself.

I'm not sure if this requires multiple files or libraries, but if it would be more convenient to do it that way that's fine with me. Thanks!

[Assistant]
Nespresso_bit.scad:
```
// Millimeters to enlarge the screw's socket of, AKA "how accurate is your printer?"
margin=0.1; // [0.1, 0.2]
// Do you want a groove in the handle?
shapedHandle=1; // [1:Yes, 0:No]
// How many sides do you want the handle to have?
sides=16; // [3:1:100]

module screw_head() {
    scale([1.15, 1, 1]) cylinder(1, (3.3+margin)/2, (3.3+margin)/2, $fn=100);
}

difference() {
    if (shapedHandle) {
        union() {
            cylinder(15, 4, 4, $fn=sides);
            translate([0, 0, 15]) hull() {
                cylinder(1, 4, 4, $fn=sides);
                translate([0, 0, 5]) cylinder(1, 3.5, 3.5, $fn=sides);
            }
            hull() {
                translate([0, 0, 20]) cylinder(1, 3.5, 3.5, $fn=sides);
                translate([0, 0, 25]) cylinder(1, 4, 4, $fn=sides);
            }
            translate([0, 0, 25]) cylinder(5, 4, 4, $fn=sides);
        }
    } else {
        cylinder(30, 4, 4, $fn=sides);
    }
    translate([0, 0, -1]) scale([1, 1, 4]) screw_head();
}
```


[User]
Hey, I'm looking to create a customizable logo based on a design I found online, specifically this Thingiverse link: http://www.thingiverse.com/thing:1693420. The idea is a vertical stake with a horizontal bar at the top, and text extruded on top of that. I want to be able to easily change the height of the stake, the text itself, the size of the text, and also adjust the horizontal and vertical position of the text a bit, as the original SCAD file allows.

Could you help me generate a parametric OpenSCAD file that does all that? Here's the specifics:

*   **Stake:**
    *   It should be a square stake, and I want to be able to adjust its height. Let's call this parameter `stake_height`. I'd like the stake to be centered on the origin, with the base at z=0.
    *   The stake's square cross-section size should be a parameter I can adjust later too, say, `stake_size`.
*   **Horizontal Bar:**
    *   There should be a horizontal bar centered on the vertical stake, and resting on its top face.
    *   I'd like to be able to specify the bar's width, let's call this parameter `bar_width`, and the bar's thickness, call it `bar_thickness`.
    * The bar's length should extend beyond the left and right edges of the stake.

*   **Text:**
    *   I want to be able to enter custom text, so we need a `text_string` parameter.
    *   There needs to be a `text_size` parameter.
    *   The text should be extruded up from the top of the horizontal bar, with a `text_thickness` parameter.
    *   I'd like to be able to adjust the x and y offsets of the text relative to the center of the top of the bar, with parameters like `text_x_offset` and `text_y_offset`.
    *   I think I'll want to use Arial font with black style, if that's okay.

I'd also like to make use of the `linear_extrude` and `text` functions that are built into OpenSCAD. I'm fine if it's all in a single .scad file. Could you generate that?

[Assistant]
logos.scad:
```
// Olimpics 2016
// By Magonegro JUL-2016
// Customizer for the Olympics Rio2016 rotating logo

// Stake height
HEIGHT=30;
// Custom text in the platter:
TEXT="A";
// Text size:
TEXTSIZE=35;
// To adjust X text pos :
XTEXTOFFSET=3;
// To adjust Y text pos (assure text is attached to baseline):
YTEXTOFFSET=-1;

/// [hidden]
STAKE=5; // 5mm square stake fixed

union()
{
    translate([-STAKE/2,0,0]) cube([STAKE,HEIGHT,STAKE]);
    translate([-22,HEIGHT,0]) cube([44,STAKE,STAKE]);
    translate([XTEXTOFFSET-22,HEIGHT+STAKE+YTEXTOFFSET,0])
        linear_extrude(height = STAKE, convexity = 10)
        text(TEXT, font = "Arial:style=Black",size=TEXTSIZE);
}

```


[User]
I'm looking to create a flexible OpenSCAD model that allows for the subdivision of polyhedra using a Catmull-Clark-like algorithm, but one that doesn't split edges. I want to control the number of subdivisions and the "curvature bias", which will affect how pointy or smooth the subdivided object becomes.

Specifically, I'd like the following:

1.  **Core Subdivision Function:**
    *   A module or function `cc(polyhedron, iterations, curve_bias)` that takes:
        *   `polyhedron`: A data structure representing the polyhedron as a list `[points, faces]`, where `points` is a list of 3D point coordinates and `faces` is a list of vertex indices forming the faces.
        *   `iterations`: An integer defining the number of subdivision passes. `0` means no subdivision.
        *   `curve_bias`: A floating-point number controlling the curvature. I need this to work with values between -1 and 2, inclusive. A negative value should make the object pointier, and a positive one should smooth it out, similar to the provided code.

2.  **Initial Polyhedra:**
    *   I need three example polyhedra:
        *   A tetrahedron (4 vertices, 4 faces)
        *   An icosahedron (12 vertices, 20 faces)
        *   The Stanford bunny (the one in the code you have is fine)
    *   These should be defined as functions that return the `[points, faces]` structure. For example, `tet()` should return a tetrahedron's data, and so on for the others.

3.  **Rendering Module:**
    *   A function/module called `trender(polyhedron)` that renders the given `[points, faces]` structure.  It should color each face based on its normal. The coloring scheme from the provided code seems good; it uses some randomly generated colors and normal direction to derive the final color.

4.  **User-defined Parameters:**
    *   The main module should have the following configurable parameters, available in the customizer:
        *   `Select`: a dropdown menu to choose between "tet", "ico", and "bunny" as a string.
        *    `Sub1`: an integer slider with values 0 and 1.
        *   `CurvatureBias`: a slider with values from -1 to 2 in increments of 0.1
        *   `Sub2`: an integer slider with values 0 through 4.
         *   `Sub3`: an integer slider with values 0 through 5.

5. **Main Module**
    * The main module should work exactly like the "Demo Code" of the provided file, utilizing user-defined parameters for subdivision passes and the type of primitive.

I'd like you to generate all the necessary OpenSCAD files for this. Make sure that everything is modular and easy to understand, as I'll likely be modifying it later. I expect that this will involve several functions and a main module to tie it all together. Let me know if you have any questions.

[Assistant]
PolyhedronCCsubdivisionDemo.scad:
```
Select="tet";//[tet,ico,bunny]
Sub1=1;//[0,1]
CurvatureBias=-0.5;//[-1:0.1:2]
Sub2=1;//[0,1,2,3,4]
Sub3=1;//[0,1,2,3,4,5]
/* [Hidden] */
///////////////////////////////////////////////////////////////////////////////
//CC subdivision-ish in that regard this impl don't split edges
// subdivides any properly watertight manifold polyhedron : point-list and face-list
// [  [[10,10,10],[10,-10,-10],[-10,10,-10],[-10,-10,10]],    [[2,1,0],[3,2,0],[1,3,0],[2,3,1]]]
// usage cc([points,faces],iterations(0=off),curvebias)
///////////////////////////////////////////////////////////////////////////////
// Demo Code
S=Select=="ico"?ico():Select=="tet"?tet():bunny();
in=cc(cc(S,Sub1),Sub2,CurvatureBias); //one regular and the two passes with negative bias for pointyness

t=cc(in,Sub3); // more passes

trender(t);  // pretty render
//polyhedron(t[0],t[1]); // fast
// End Of Demo Code

///////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////
module trender(t){C0=(un(rndc())+[2,0,0]);C1=(un(rndc())+[2,2,0]);C2=(un(rndc())+[0,2,2]);for(i=[0:max(0,len(t[1])-1)]){ n=un(p2n(t[0][t[1][i][0]],t[0][t[1][i][1]],t[0][t[1][i][2]]));color(un((C0*abs(n[0])+C1*abs(n[1])+C2*abs(n[2])+[1,1,1]*abs(n[2]))/4))polyhedron(t[0],[t[1][i]]);}}
///////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////
function cc(V,n=1,curve=0.61803398875)=n<=0?V:n==1?let(w=V)let(ed=cccheck(ccQS (ccQS (ccQS (ccQS (ccde(w[1],len(w[0])-1),2),1),0),1)))let(nf=ccnf(ed))ccflip([ccnv(w,nf,curve),nf]):let(w=cc(V,n-1,curve))let(ed=cccheck(ccQS (ccQS (ccQS (ccQS (ccde(w[1],len(w[0])-1),2),1),0),1)))let(nf=ccnf(ed))ccflip([ccnv(w,nf,curve),nf]);
function ccnv(v,nf,curve)=let(nv=[for(i=[0:len(v[1])-1])(v[0][v[1][i][0]]+v[0][v[1][i][1]]+v[0][v[1][i][2]])/3])let(sfv=[for(i=[0:len(v[0])-1])avrg(ccfind(i,v[1],nv))])concat(lerp(v[0],sfv,curve),nv);
function ccnf(hf)=[for(i=[0:1:len(hf)-1])(i%2)==0?[hf[i][4],hf[(i+1)%len(hf)][2],hf[i][2]]:[hf[i][4],hf[(i-1)%len(hf)][2],hf[i][2]]];
function ccde(faces,points)=let(l=len(faces)-1) [for(i=[0:l])  let(f=faces[i])   for(j=[0:len(f)-1])     let(p=f[j],q=f[(j+1)%len(f)])       [min(p,q),max(p,q),i+points+1,p,q] //noduplicates
];
function cccheck(ed)=concat([for(i=[0:len(ed)-1])if((ed[i][0]==ed[i-1][0]&&ed[i][1]==ed[i-1][1])||(ed[i][0]==ed[i+1][0]&&ed[i][1]==ed[i+1][1]))ed[i]]);
function ccfind(lookfor,faces,nv)=   [for(i=[0:len(faces)-1])if(faces[i][0]==lookfor||faces[i][1]==lookfor||faces[i][2]==lookfor)nv[i]];
function ccQS (arr,o)=!(len(arr)>0)?[]:let(  pivot =arr[floor(len(arr)/2)],  lesser =[for(y=arr)if(y[o] <pivot[o])y],  equal =[for(y=arr)if(y[o]==pivot[o])y],  greater=[for(y=arr)if(y[o] >pivot[o])y])concat(  ccQS (lesser,o),equal,ccQS (greater,o));
function wave(w,a=1,b=1)=[[for(i=[0:len(w[0])-1])let(x=w[0][i][0],y=w[0][i][1],z=w[0][i][2])w[0][i]+[sin((y+z)*b)*a,sin((z+x)*b)*a,sin((x+y)*b)*a]],w[1]];
function ccweld(v)=let(data=v[0])[v[0],[for(i=[0:len(v[1])-1])let(index1=v[1][i][0],index2=v[1][i][1],index3=v[1][i][2])concat(search(data[index1][0],data),search(data[index2][0],data),search(data[index3][0],data,1))]];
function ccflip(w)=[w[0],[for(i=[0:len(w[1])-1])[w[1][i][0],w[1][i][2],w[1][i][1]]]];
///////////////////////////commonfunction s/////////////////////////////
function un(v)=v/max(len3(v),0.000001)*1;
function p2n(pa,pb,pc)=
let(u=pa-pb,v=pa-pc)un([u[1]*v[2]-u[2]*v[1],u[2]*v[0]-u[0]*v[2],u[0]*v[1]-u[1]*v[0]]);
function avrg(v)=sumv(v,max(0,len(v)-1))/len(v);
function lerp(start,end,bias)=(end*bias+start*(1-bias));
function len3(v)=len(v)==2?sqrt(pow(v[0],2)+pow(v[1],2)):sqrt(pow(v[0],2)+pow(v[1],2)+pow(v[2],2));
function sumv(v,i,s=0)=(i==s?v[i]:v[i]+sumv(v,i-1,s));
function rnd(a=0,b=1)=(rands(min(a,b),max(a,b),1)[0]);
function rndc()=[rands(0,1,1)[0],rands(0,1,1)[0],rands(0,1,1)[0]];
function v3rnd(c=1)=[rands(-1,1,1)[0]*c,rands(-1,1,1)[0]*c,rands(-1,1,1)[0]]*c;
function roundlist(v,r=1)=len(v)==undef?v-(v%r):len(v)==0?[]:[for(i=[0:len(v)-1])roundlist(v[i],r)];
function limlist(v,r=1)= [for(i=[0:len(v)-1])[v[i][0],v[i][1],v[i][2]]];

//////////////////////Make geometry function///////////////////
function ico(a=10)=
let(r=a*1.61803)[[[0,-r,a],[0,r,a],[0,r,-a],[0,-r,-a],[a,0,r],[-a,0,r],[-a,0,-r],[a,0,-r],[r,a,0],[-r,a,0],[-r,-a,0],[r,-a,0]],[[0,5,4],[0,4,11],[11,4,8],[11,8,7],[4,5,1],[4,1,8],[8,1,2],[8,2,7],[1,5,9],[1,9,2],[2,9,6],[2,6,7],[9,5,10],[9,10,6],[6,10,3],[6,3,7],[10,5,0],[10,0,3],[3,0,11],[3,11,7]]];
function tet()= [  [[10,10,10],[10,-10,-10],[-10,10,-10],[-10,-10,10]],
[[2,1,0],[3,2,0],[1,3,0],[2,3,1]]];
function bunny()=[[[33.718,-8.247,33.616],[-30.065,-22.111,41.454],[1.142,14.457,35.998],[20.205,-17.34,49.075],[36.378,-2.827,7.022],[-11.251,13.5,5.136],[29.105,-18.728,7.239],[-9.845,8.083,9.951],[-36.86,-24.079,60.289],[-28.976,-3.302,3.436],[-11.413,-13.526,50.148],[28.736,-0.816,42.915],[-32.116,4.195,42.182],[29.812,-7.088,2.935],[-37.993,-15.409,34.838],[-28.78,-18.857,66.373],[-29.289,21.548,77.615],[-28.191,23.665,69.162],[-36.226,-11.242,66.87],[31.967,2.895,30.506],[-25.318,1.605,64.068],[-41.72,-13.563,47.396],[3.505,-27.667,8.246],[18.251,9.502,40.482],[-40.705,-8.309,57.649],[-34.759,-14.864,24.435],[41.326,-8.903,12.497],[7.937,-25.727,1.639],[0.142,18.861,18.906],[37.372,0.543,12.665],[11.469,-25.566,39.178],[-11.3,-25.322,6.98],[16.983,0.961,50.904],[25.417,10.084,22.882],[12.196,16.124,13.812],[-38.798,-23.136,44.566],[-6.906,16.568,23.283],[-11.406,5.707,70.997],[27.876,3.576,10.072],[-29.124,6.104,23.795],[30.252,-19.533,18.403],[-24.95,-3.186,68.402],[-21.5,4.288,1.733],[-20.217,0.035,59.846],[-16.111,-1.157,53.825],[9.791,18.388,28.806],[-20.449,-9.927,10.118],[-5.697,-29.44,3.937],[-14.075,-24.543,1.192],[-38.314,-4.065,30.749],[-17.348,-6.564,61.51],[39.723,-14.873,17.026],[-24.142,-11.883,1.318],[4.044,-18.973,49.654],[-25.128,-21.576,4.037],[28.884,-15.239,42.197],[-7.042,-23.574,16.146],[-22.782,1.057,13.904],[-30.957,-28.833,46.933],[-13.723,10.348,24.112],[-6.4,7,79.935],[0.38,8.58,73.547],[-2.751,-29.774,24.603],[32.871,-16.125,29.207],[-3.623,17.983,31.576],[17.513,4.686,2.883],[-30.017,-27.275,56.561],[13.323,-29.14,13.068],[-20.244,-21.378,18.476],[-20.735,-20.229,49.671],[34.577,-0.469,19.663],[-32.728,2.082,59.206],[1.448,8.004,45.899],[-21.1,-24.65,32.38],[-3.299,14.822,3.265],[37.681,-9.851,21.953],[10.732,-31.947,27.781],[-25.458,13.814,68.264],[14.963,11.754,4.948],[-21.548,-8.801,67.863],[2.005,-5.173,1.969],[-23.472,3.741,51.505],[21.968,-9.013,50.599],[-9.451,7.934,17.546],[41.184,-5.284,20.179],[-39.539,-2.907,46.751],[-39.019,-9.922,42.553],[-16.487,10.221,37.797],[-9.537,-0.368,72.53],[-13.553,-22.428,41.139],[-5.875,-25.824,33.532],[10.433,-17.548,2.653],[-40.968,-17.45,57.613],[-32.842,15.053,71.785],[-4.31,-4.034,51.575],[10.947,-7.696,54.207],[1.296,-30.04,33.917],[-33.833,1.324,66.787],[-27.494,-6.782,16.239],[-21.944,-17.558,61.153],[-38.475,-27.624,50.311],[24.879,-24.385,33.536],[-21.259,-16.919,7.059]],[[80,91,48],[27,48,91],[68,98,46],[48,52,80],[98,25,49],[54,52,48],[42,74,80],[52,42,80],[42,5,74],[6,13,26],[25,98,68],[9,42,52],[46,102,68],[58,35,1],[1,35,21],[80,74,65],[100,35,58],[80,65,13],[91,80,13],[27,91,6],[6,91,13],[47,48,27],[51,75,40],[87,59,39],[5,7,74],[2,72,23],[28,74,7],[54,102,52],[64,28,36],[60,61,37],[39,57,98],[64,45,28],[34,74,28],[31,48,47],[102,54,31],[7,42,57],[59,57,39],[12,81,87],[37,43,41],[2,45,64],[74,34,78],[41,43,20],[59,7,57],[28,45,34],[87,39,12],[45,33,34],[37,41,60],[12,71,81],[34,33,78],[72,2,87],[38,29,65],[65,29,4],[49,12,39],[50,79,99],[94,72,44],[23,11,19],[27,6,67],[72,81,44],[44,81,43],[87,81,72],[70,75,84],[43,81,20],[45,2,23],[29,70,84],[19,33,23],[33,45,23],[32,72,94],[83,7,59],[98,57,46],[57,9,46],[71,85,24],[97,71,24],[97,93,71],[85,12,49],[49,39,98],[9,57,42],[32,94,95],[23,72,32],[71,93,17],[18,24,92],[5,42,7],[86,1,21],[83,59,36],[83,36,7],[36,28,7],[64,36,59],[23,32,11],[93,16,17],[12,85,71],[18,8,15],[92,35,100],[87,2,59],[22,62,56],[9,52,46],[8,92,100],[90,62,96],[14,1,86],[93,97,16],[14,25,73],[25,68,73],[1,14,73],[16,77,17],[30,90,96],[2,64,59],[8,100,66],[77,71,17],[32,82,11],[41,79,60],[15,79,41],[3,55,82],[82,55,11],[10,94,44],[44,50,10],[20,77,16],[79,88,60],[20,71,77],[99,69,10],[21,92,24],[50,99,10],[16,41,20],[8,18,92],[97,41,16],[22,27,67],[51,84,75],[15,66,99],[97,18,41],[55,0,11],[4,26,13],[55,63,0],[70,38,33],[102,46,52],[14,49,25],[75,0,63],[74,78,65],[19,70,33],[38,65,78],[33,38,78],[86,85,49],[97,24,18],[65,4,13],[86,49,14],[70,29,38],[50,61,88],[6,26,51],[37,61,43],[30,76,101],[40,101,67],[101,76,67],[30,101,3],[101,40,63],[55,3,101],[40,75,63],[22,47,27],[67,6,40],[60,88,61],[43,50,44],[19,11,0],[63,55,101],[26,4,29],[84,26,29],[31,54,48],[69,99,66],[58,1,69],[69,66,58],[76,62,67],[3,53,30],[67,62,22],[43,61,50],[30,96,76],[96,62,76],[22,31,47],[53,89,30],[89,90,30],[95,3,82],[56,31,22],[95,53,3],[10,89,53],[90,56,62],[90,73,56],[40,6,51],[89,73,90],[21,85,86],[56,68,31],[0,75,70],[73,68,56],[69,89,10],[68,102,31],[84,51,26],[15,41,18],[89,69,1],[1,73,89],[92,21,35],[82,32,95],[24,85,21],[0,70,19],[71,20,81],[8,66,15],[79,50,88],[66,100,58],[94,53,95],[15,99,79],[10,53,94]]];
```


[User]
I'm looking for an OpenSCAD design for a container to hold stacks of poker chips. I'd like it to be parametric, so I can easily adjust the size and number of chips it holds.

Here are the key features I'm envisioning:

*   **Cylindrical Design:** The container should be basically a cylinder, with walls thick enough to provide some structure.
*   **Chip Stack:** The container should hold a vertical stack of poker chips.
*   **Base:** There should be a base that keeps the chips from falling out the bottom. I'm thinking a solid base, perhaps with a short set of legs.
*   **Access:** There should be a couple of slots to allow easy removal of the poker chips. These should run vertically along the cylinder, from top to bottom. I think having the slots be opposite each other would be helpful.
*   **Parameters:** I need to be able to specify:
    *   The diameter of the chips to be stored
    *   The thickness of each chip.
    *   The number of chips the stack should hold.
    *   The wall thickness of the container.
    *   The width of the access slots.
    *   The length of the legs on the base.

I'm hoping for something that's fairly simple, but functional. It should be easy to print and to customize. I don't have any particular requirements for libraries; I'm fine with whatever you think is best, although if you're using any libraries, could you please specify which ones? Thanks!

[Assistant]
chip_stack.scad:
```

// millimeters
chip_diameter = 40;

// millimeters
chip_thickness = 3.3;

// number of chips
stack_height = 12;

wall_thickness = 0.75;

slot_opening = 8;

leg_length = 10;

/* [Hidden] */

slop = 0.2;

difference() {
    cylinder(h=((stack_height * chip_thickness) + wall_thickness + leg_length), d=(chip_diameter + (2 * wall_thickness) + slop));

    translate([0,0,wall_thickness + leg_length])
    cylinder(h=(stack_height * chip_thickness), d=chip_diameter + slop);

    cylinder(h=(wall_thickness + leg_length), d=(chip_diameter - (8 * wall_thickness)));

    translate([-(chip_diameter + (2 * wall_thickness) + slop)/2, 0, (chip_thickness * stack_height)/2 + leg_length])
    rotate([0,90,0])
    hull() {
        translate([(chip_thickness * stack_height)/4, 0, 0])
        cylinder(h=(chip_diameter + (2 * wall_thickness) + slop), d=slot_opening);

        translate([-(chip_thickness * stack_height)/4, 0, 0])
        cylinder(h=(chip_diameter + (2 * wall_thickness) + slop), d=slot_opening);
    };

    translate([0, -(chip_diameter + (2 * wall_thickness) + slop)/2, (chip_thickness * stack_height)/2 + leg_length])
    rotate([0,90,90])
    hull() {
        translate([(chip_thickness * stack_height)/4, 0, 0])
        cylinder(h=(chip_diameter + (2 * wall_thickness) + slop), d=slot_opening);

        translate([-(chip_thickness * stack_height)/4, 0, 0])
        cylinder(h=(chip_diameter + (2 * wall_thickness) + slop), d=slot_opening);
    };

    translate([-(chip_diameter + (2 * wall_thickness) + slop)/2,0,0])
    rotate([0,90,0])
    cylinder(h=(chip_diameter + (2 * wall_thickness) + slop), d=(chip_diameter/2));

    translate([0,-(chip_diameter + (2 * wall_thickness) + slop)/2,0])
    rotate([0,90,90])
    cylinder(h=(chip_diameter + (2 * wall_thickness) + slop), d=(chip_diameter/2));
};
```


[User]
Hey, I'm looking to create a parametric OpenSCAD model for a series of enclosures based on Hammond's 1550 and 1590 series, but I want to use magnets instead of screws for closure. I've found a design I really like already, but I need to be able to create them from scratch. The models need to be parametric so I can tweak sizes easily.

Specifically, I'd like to have models for the following Hammond enclosures: 1550A, 1550B, 1550P, 1550Q, 1590A, 1590B, and 1590G. I also want to be able to render the body, the lid, or both parts together, so those should be parameters. It should take a color parameter as well for the different parts.

The enclosures should be as close as possible to the original Hammond dimensions, both external and internal. The magnet holes in the body need to be designed for 3mm diameter by 10mm height cylindrical magnets, and the holes in the lid should be designed for 4mm diameter and 3mm height cylindrical magnets. The holes in the lid *should not* go all the way through the lid, just 3mm into it.

I need to be able to adjust the magnet hole diameters in both the body and the lid using parameters, in case my magnets aren't exactly the specified sizes or I want to use slightly different sizes. Also, I need to be able to adjust the Z-offset for the holes and add a bit of wall thickness to both the magnet holders on both parts. I'd also like to define the width of the snap tabs that hold the lid on, as well as the standard `$fn`.

It'd be helpful if the design included a test piece to make sure that all the settings fit correctly. Specifically, a test cube on the corner of the model that has the same dimensions as the magnet slots.

I don't want to use any libraries like BOSL, MCAD, etc for this. I want it all in one or more .scad files.

The documentation I'm using for the boxes is here:

1550:
* 1550A: http://www.hammondmfg.com/pdf/1550A.pdf
* 1550B: http://www.hammondmfg.com/pdf/1550B.pdf
* 1550P: http://www.hammondmfg.com/pdf/1550P.pdf
* 1550Q: http://www.hammondmfg.com/pdf/1550Q.pdf

1590:
* 1590A: http://www.hammondmfg.com/pdf/1590A.pdf
* 1590B: http://www.hammondmfg.com/pdf/1590B.pdf
* 1590G: http://www.hammondmfg.com/pdf/1590G.pdf

Thanks!

[Assistant]
parametric_hammond.scad:
```
/**
 * Available enclosures:
 *
 * Hammond:
 * + http://www.hammondmfg.com/pdf/1550A.pdf
 * + http://www.hammondmfg.com/pdf/1550B.pdf
 * + http://www.hammondmfg.com/pdf/1550P.pdf
 * + http://www.hammondmfg.com/pdf/1550Q.pdf
 *
 * + http://www.hammondmfg.com/pdf/1590A.pdf
 * + http://www.hammondmfg.com/pdf/1590B.pdf
 * + http://www.hammondmfg.com/pdf/1590G.pdf
 */

/* [Type] */
// Which part of the enclosure to view?
part = "both"; // [both, body, lid, test]

// Which type of box do you want?
type = "hammond1550a"; // [hammond1550a, hammond1550b, hammond1550p, hammond1550q, hammond1590a, hammond1590b, hammond1590g]

/* [Body] */

// Adjust in case your magnets do not fit width wise.
diameterOffsetBodyHole = -0.25; // [-5:0.05:5]

// Increase in case your magnet holders are too flimsy.
additionalWallBody = 0.00; // [-5:0.05:5]

// Decrease in case your magnets do not fit height wise.
zOffsetBodyHole = 0.00; // [-5:0.05:5]

/* [Lid] */

// Adjust in case your magnets do not fit width wise
diameterOffsetLidHole = 0.10; // [-5:0.05:5]

// Increase in case your magnet holder walls are too flimsy
additionalWallLid = 0.00; // [-5:0.05:5]

// Decrease in case your magnets do not fit height wise.
zOffsetLidHole = 0.00; // [-5:0.05:5]

// The width of the snaps
snapWidth = 1.00; // [-5:0.05:5]

/* [Hidden] */
$fn = 36;
print = true;

enclosure(type, part);

module enclosure(type, part, boxColor) {
  if(type == "hammond1550a")
    hammond1550a(part, boxColor);

  if(type == "hammond1550b")
    hammond1550b(part, boxColor);

  if(type == "hammond1550p")
    hammond1550p(part, boxColor);

  if(type == "hammond1550q")
    hammond1550q(part, boxColor);

  if(type == "hammond1590a")
    hammond1590a(part, boxColor);

  if(type == "hammond1590b")
    hammond1590b(part, boxColor);

  if(type == "hammond1590g")
    hammond1590g(part, boxColor);
}

module hammond1550a(part="both", boxColor="grey") {
  outerLength = 89;
  outerWidth = 35;
  outerHeight = 30.1;
  lidHeight = 4.1;

  innerLength = 86;
  innerWidth = 32;
  innerHeight = 27.1;

  postDiameter = 4;
  postWidthBody = 6.5;
  postWidthLid = 6.5;
  holeDiameterBody = 3.5;
  holeDiameterLid = 4;

  xOffsetHole = 5;
  yOffsetHole = 5;

  outerDiameter = 7;

  hammond(
    outerLength, outerWidth, outerHeight, lidHeight,
    innerLength, innerWidth, innerHeight,
    postWidthBody, holeDiameterBody,
    postWidthLid, holeDiameterLid,
    xOffsetHole, yOffsetHole,
    outerDiameter, postDiameter,
    part, boxColor);
}

module hammond1550b(part="both", boxColor="grey") {
  outerLength = 114.50;
  outerWidth = 64;
  outerHeight = 30.1;
  lidHeight = 4.1;

  innerLength = 111.50;
  innerWidth = 60.58;
  innerHeight = 27.1;

  postDiameter = 4;
  postWidthBody = 6.5;
  postWidthLid = 6.5;
  holeDiameterBody = 3.5;
  holeDiameterLid = 4;

  xOffsetHole = 5;
  yOffsetHole = 5;

  outerDiameter = 7;

  hammond(
    outerLength, outerWidth, outerHeight, lidHeight,
    innerLength, innerWidth, innerHeight,
    postWidthBody, holeDiameterBody,
    postWidthLid, holeDiameterLid,
    xOffsetHole, yOffsetHole,
    outerDiameter, postDiameter,
    part, boxColor);
}

module hammond1550p(part="both", boxColor="grey") {
  outerLength = 80;
  outerWidth = 55;
  outerHeight = 25.1;
  lidHeight = 4.1;

  innerLength = 76.13;
  innerWidth = 52;
  innerHeight = 22.1;

  postDiameter = 4;
  postWidthBody = 6.5;
  postWidthLid = 6.5;
  holeDiameterBody = 3.5;
  holeDiameterLid = 4;

  xOffsetHole = 5;
  yOffsetHole = 5;

  outerDiameter = 7;

  hammond(
    outerLength, outerWidth, outerHeight, lidHeight,
    innerLength, innerWidth, innerHeight,
    postWidthBody, holeDiameterBody,
    postWidthLid, holeDiameterLid,
    xOffsetHole, yOffsetHole,
    outerDiameter, postDiameter,
    part, boxColor);
}

module hammond1550q(part="both", boxColor="grey") {
  outerLength = 60;
  outerWidth = 55;
  outerHeight = 30.1;
  lidHeight = 4.1;

  innerLength = 57;
  innerWidth = 51;
  innerHeight = 26.8;

  postDiameter = 4;
  postWidthBody = 6.5;
  postWidthLid = 6.5;
  holeDiameterBody = 3.5;
  holeDiameterLid = 4;

  xOffsetHole = 5;
  yOffsetHole = 5;

  outerDiameter = 7;

  hammond(
    outerLength, outerWidth, outerHeight, lidHeight,
    innerLength, innerWidth, innerHeight,
    postWidthBody, holeDiameterBody,
    postWidthLid, holeDiameterLid,
    xOffsetHole, yOffsetHole,
    outerDiameter, postDiameter,
    part, boxColor);
}

module hammond1590a(part="both", boxColor="grey") {
  outerLength = 92.6;
  outerWidth = 38.5;
  outerHeight = 31;
  lidHeight = 4.1;

  innerLength = 89.10;
  innerWidth = 35;
  innerHeight = 27.4;

  postDiameter = 4;
  postWidthBody = 6.5;
  postWidthLid = 6.5;
  holeDiameterBody = 3.5;
  holeDiameterLid = 4;

  xOffsetHole = 5;
  yOffsetHole = 5;

  outerDiameter = 7;

  hammond(
    outerLength, outerWidth, outerHeight, lidHeight,
    innerLength, innerWidth, innerHeight,
    postWidthBody, holeDiameterBody,
    postWidthLid, holeDiameterLid,
    xOffsetHole, yOffsetHole,
    outerDiameter, postDiameter,
    part, boxColor);
}

module hammond1590b(part="both", boxColor="grey") {
  outerLength = 112.4;
  outerWidth = 60.5;
  outerHeight = 31;
  lidHeight = 4.1;

  innerLength = 108.1;
  innerWidth = 56.5;
  innerHeight = 27;

  postDiameter = 4;
  postWidthBody = 6;
  postWidthLid = 6;
  holeDiameterBody = 3.5;
  holeDiameterLid = 4;

  xOffsetHole = 5;
  yOffsetHole = 5;

  outerDiameter = 7;

  hammond(
    outerLength, outerWidth, outerHeight, lidHeight,
    innerLength, innerWidth, innerHeight,
    postWidthBody, holeDiameterBody,
    postWidthLid, holeDiameterLid,
    xOffsetHole, yOffsetHole,
    outerDiameter, postDiameter,
    part, boxColor);
}

module hammond1590g(part="both", boxColor="grey") {
  outerLength = 100;
  outerWidth = 50;
  outerHeight = 25;
  lidHeight = 4.1;

  innerLength = 96.2;
  innerWidth = 46.2;
  innerHeight = 21;

  postDiameter = 4;
  postWidthBody = 6.5;
  postWidthLid = 6.5;
  holeDiameterBody = 3.5;
  holeDiameterLid = 4;

  xOffsetHole = 5;
  yOffsetHole = 5;

  outerDiameter = 7;

  hammond(
    outerLength, outerWidth, outerHeight, lidHeight,
    innerLength, innerWidth, innerHeight,
    postWidthBody, holeDiameterBody,
    postWidthLid, holeDiameterLid,
    xOffsetHole, yOffsetHole,
    outerDiameter, postDiameter,
    part, boxColor);
}

module hammond(
  outerLength, outerWidth, outerHeight, lidHeight,
  innerLength, innerWidth, innerHeight,
  postWidthBody, holeDiameterBody,
  postWidthLid, holeDiameterLid,
  xOffsetHole, yOffsetHole,
  outerDiameter, postDiameter,
  part, boxColor)
{
  holeRadiusBody = holeDiameterBody / 2;
  holeRadiusLid = holeDiameterLid / 2;
  outerRadius = outerDiameter / 2;
  postRadius = postDiameter / 2;
  bodyHeight = outerHeight - lidHeight;

  xOffset = (outerLength - innerLength) / 2;
  yOffset = (outerWidth - innerWidth) / 2;
  zOffset = (outerHeight - innerHeight) / 2;

  screwPosts = [
    [0, 0, zOffset],
    [outerLength, 0, zOffset],
    [outerLength, outerWidth, zOffset],
    [0, outerWidth, zOffset]
  ];

  translate([outerWidth / 2, -outerHeight / 2, outerLength]) {
    rotate([0,90,90]) {
      if(part == "both" && !print) {
        translate([outerLength, 0, outerHeight])
          rotate([0,180,0])
            color(boxColor)
              renderBody();

        %renderLid();
      }

      if(part == "both" && print) {
        yOffset = (outerLength + outerWidth) / 2;
        pos = [outerLength, yOffset, 0];
        rot = [90, 0, 270];

        translate(pos)
          rotate(rot){
            renderBody();

            translate([0, outerWidth +3, 0])
              renderLid();
          }
      }

      if(part == "body") {
        yOffset = (outerLength + outerWidth) / 2;
        pos = (print) ? [outerLength, yOffset, 0] : [outerLength, 0, outerHeight];
        rot = (print) ? [90, 0, 270] : [0,180,0];

        translate(pos)
          rotate(rot)
            color(boxColor)
              renderBody();
      }

      if(part == "lid") {
        yOffset = (outerLength + outerWidth) / 2;
        pos = (print) ? [outerLength, yOffset, 0] : [0, 0, 0];
        rot = (print) ? [90, 0, 270] : [0, 0, 0];

        translate(pos)
          rotate(rot)
            color(boxColor)
              renderLid();
      }

      if(part == "test") {
        length = 13;
        width = 13;
        height = 10;

        translate([outerLength - outerHeight, 0, outerLength/4])
        rotate([0, 90, 0]) {
          intersection() {
            translate([0, 0, outerHeight - height])
              cube([length, width, height]);

            translate([outerLength, 0, outerHeight])
              rotate([0,180,0])
                  renderBody();
          }

          translate([0, -outerWidth +  (length * 2), 0])
            intersection() {
              translate([0, outerWidth - width, outerHeight - height])
                cube([length, width, height]);

              translate([outerLength, 0, outerHeight])
                rotate([0,180,0])
                  renderLid();
            }
        }
      }
    }
  }

  module renderBody() {
    postHeight = bodyHeight - zOffset;
    holeRadius = holeRadiusBody + diameterOffsetBodyHole / 2;

    difference() {
      difference() {
        roundBody(bodyHeight);

        difference() {
          translate([xOffset, yOffset, zOffset])
            cube([innerLength, innerWidth, bodyHeight]);

          screwPosts(postWidthBody + additionalWallBody, postHeight);
        }
      }

      postHoles(outerHeight, holeRadius, zOffsetBodyHole);
    }
  }

  module renderLid() {
    zOffsetPost = 0.1;
    postHeight = lidHeight - zOffset + zOffsetPost;

    holeHeight = 3;
    holeRadius = holeRadiusLid + diameterOffsetLidHole / 2;
    zOffsetHole = -zOffset + lidHeight - holeHeight + zOffsetLidHole;

    difference() {
      group() {
        difference() {
          roundBody(lidHeight);

          translate([xOffset, yOffset, zOffset])
            cube([innerLength, innerWidth, lidHeight]);
        }

        translate([0, 0, -zOffsetPost])
          screwPosts(postWidthLid + additionalWallLid, postHeight, holeRadiusLid);

        translate([outerLength / 2 - 3.5, yOffset, zOffset])
          cube([7, snapWidth, lidHeight - zOffset + 1]);

        translate([outerLength / 2 - 3.5, outerWidth - yOffset - snapWidth, zOffset])
          cube([7, snapWidth, lidHeight - zOffset + 1]);

        translate([yOffset, outerWidth / 2 - 3.5, zOffset])
          cube([snapWidth, 7, lidHeight - zOffset + 1]);

        translate([outerLength - yOffset - snapWidth, outerWidth / 2 - 3.5, zOffset])
          cube([snapWidth, 7, lidHeight - zOffset + 1]);
      }

      postHoles(outerHeight, holeRadius, zOffsetHole);
    }
  }

  module roundBody(cutHeight) {
    cornersBottom = [
      [outerRadius, outerRadius, outerRadius],
      [outerLength - outerRadius, outerRadius, outerRadius],
      [outerLength - outerRadius, outerWidth - outerRadius, outerRadius],
      [outerRadius, outerWidth - outerRadius, outerRadius]
    ];

    cornersTop = [
      [outerRadius, outerRadius, outerRadius],
      [outerLength - outerRadius, outerRadius, outerRadius],
      [outerLength - outerRadius, outerWidth - outerRadius, outerRadius],
      [outerRadius, outerWidth - outerRadius, outerRadius]
    ];

    bodyInnerWidth = outerWidth - outerRadius * 2;
    bodyInnerLength = outerLength - outerRadius * 2;
    bodyInnerHeight = cutHeight- outerRadius;

    translate([0, outerRadius,outerRadius])
      cube([outerLength, bodyInnerWidth, bodyInnerHeight]);

    translate([outerRadius, 0, outerRadius])
      cube([bodyInnerLength, outerWidth,  bodyInnerHeight]);

    for(pos = cornersTop)
      translate(pos)
        cylinder(r=outerRadius, h = bodyInnerHeight);

    //1832 // 7170
    difference() {
      hull() {
        for(pos = cornersBottom)
          translate(pos)
            sphere(r=outerRadius);
      }

      translate([-1, -1, cutHeight])
        cube([outerLength + 2, outerWidth + 2, cutHeight]);
    }
  }

  module postHoles(height, radius, zOffset) {
    for(i = [0:3])
      translate(screwPosts[i])
        rotate([0, 0, 90 * i])
          translate([xOffsetHole, yOffsetHole, zOffset])
            cylinder(r=radius, h=height);
  }

  module screwPosts(postWidth, height, holeRadius) {
    for(i = [0:3])
      translate(screwPosts[i])
        rotate([0, 0, 90 * i])
          screwPost(postWidth, height, holeRadius);
  }

  module screwPost(postWidth, height) {
    offsetRadius = postWidth - postRadius;

    translate([min(xOffset, yOffset), min(xOffset, yOffset), 0]) {
      cube([postWidth, postWidth - postRadius, height]);

      cube([postWidth - postRadius, postWidth , height]);

      translate([offsetRadius, offsetRadius, 0])
        cylinder(r=postRadius, h=height);
    }
  }
}
```


[User]
I'm looking to generate a set of parametric 3D printable nails in OpenSCAD, and I'd like to be able to customize several aspects of them. I'm not looking to do anything with them other than have something to print for a curiosity. I want a simple nail design, with a cylindrical shaft and a conical point, as well as a flat, circular head.

Specifically, I'd like the following parameters to be adjustable:

*   `quantity`: The total number of nails to generate.
*   `nail_diam`: The diameter of the nail shaft.
*   `nail_len`: The total length of the nail (excluding the head).
*   `nail_sides`: The number of sides of the nail shaft (e.g., 6 for hexagonal, 3 for triangular, etc.). For round shafts, this should probably be 12 or higher for good approximation, but the point will still be conical, so it may not need to be very high, depending on the application.
*   `nail_tip_angle`: The angle of the conical tip in degrees.
*   `head_diam`: The diameter of the nail head.
*   `head_thick`: The thickness of the nail head.

The code should also automatically compute intermediate values such as:

*   `nail_tiplen`: The length of the nail tip, calculated based on `nail_diam` and `nail_tip_angle`.
*   `nail_straightlen`: The length of the straight cylindrical portion of the nail shaft. It is the total length of the nail, minus the tip length.
*   `nail_zoff`: A z offset so that the cylindrical shaft does not have the tip going beyond the end of the head. The head and shaft are to be centered along the z-axis. It's a formula that relates to the shaft diameter and number of sides.
*   `nail_width`: The greater of the `nail_diam` or `head_diam`.

The code should have two modules:

*   `Nail()`: This module should generate a single nail.
*   `NailSet(quantity)`: This module should generate the given number of nails laid out in a grid so they fit within a reasonable bounding box. I'd like it to minimize wasted space on the build plate. Assume they're always printed on their sides.

I'm hoping to be able to adjust all of these in Customizer. Also, there aren't any special libraries needed for this, but if you think there might be a good way to use something, feel free to suggest it.

Also, I just had a thought. This is a curiosity, so it doesn't need to be super accurate, but could you possibly use a `render()` function in the `Nail()` module so that if someone were to try to assemble a complex object out of them, they wouldn't all be rendered if you only needed to work on a small section? Maybe the `NailSet` module would be fine without it, so only the individual nails would need it.

[Assistant]
nails.scad:
```
// Created in 2016 by Ryan A. Colyer.
// This work is released with CC0 into the public domain.
// https://creativecommons.org/publicdomain/zero/1.0/
//
// http://www.thingiverse.com/thing:1695879

quantity = 8;

nail_diam = 4;
nail_len = 40;
nail_sides = 6;
nail_tip_angle = 30;

head_diam = 8;
head_thick = 2;

nail_tiplen = (nail_diam/2) / tan(nail_tip_angle);
nail_straightlen = nail_len - nail_tiplen;
nail_zoff = (nail_diam/2) * cos(180/nail_sides);
nail_width = (nail_diam > head_diam) ? nail_diam : head_diam;

module Nail() {
  render() {
    // Head
    difference() {
      translate([0, 0, nail_diam/2])
        rotate([-90, 0, 0])
        cylinder(h=head_thick, r=head_diam/2, $fn=12*head_diam);
      translate([0, 0, -2*head_diam])
        cube([4*head_diam, 4*head_diam, 4*head_diam], center=true);
    }

    // Rod
    translate([0, head_thick - 0.01, nail_zoff])
      rotate([-90, 0, 0])
      rotate([0, 0, 180/nail_sides+90])
      cylinder(h=nail_straightlen + 0.01, r=nail_diam/2, $fn=nail_sides);

    // Tip
    translate([0, head_thick + nail_straightlen - 0.01, nail_zoff])
      rotate([-90, 0, 0])
      rotate([0, 0, 180/nail_sides+90])
      cylinder(h=nail_tiplen + 0.01, r1=nail_diam/2, r2=0.001, $fn=nail_sides);
  }
}

module NailSet(quantity=1) {
  colmax_1 = floor(sqrt(quantity*2*nail_width*1.5*(nail_len + head_thick))
    / (2*nail_width*1.35));
  rowmax = ceil(quantity / colmax_1);
  colmax = ceil(quantity / rowmax);

  for (i=[1:quantity]) {
    translate([2*nail_width*((i-1)%colmax),
      1.5*(nail_len+head_thick)*floor((i-1)/colmax), 0])
      Nail();
  }
}

NailSet(quantity);

```


[User]
I need a parametric OpenSCAD design for an SD card storage box. The box should have slots for holding SD cards and be customizable in terms of the number of slots, side enclosure style, and stackability features.

Here are the specific requirements:

*   **Number of Slots:** The design should allow the user to specify the number of SD card slots, ranging from 5 to 30. This needs to be a parameter I can easily change.

*   **Side Enclosure:** The sides of the box can be configured in a few different ways. I'd like options for:
    *   "Closed": Fully enclosed sides.
    *   "Open": No sides at all.
    *   "Halfway": Sides that extend half the height of the box.
    *   "Quarter": Sides that extend a quarter of the height of the box.

*   **Stackability:** The design should have options for stackability:
    *   "None": No stackability features.
    *   "Left": A groove on the left side of the box, allowing it to stack on top of another box (I'd like a matching lip on the bottom of the box to engage with the groove).
    *   "Right": A groove on the right side of the box, allowing it to stack on top of another box (with matching lip).
    *   "Both": Stackability features on both the left and right sides. The grooves should be on the top surface, and the lips should be on the bottom surface, and these should interlock correctly when boxes are stacked on top of each other.

*   **Dimensions:** The SD card slots should be the correct size to hold SD cards securely. The total length of the box will need to depend on how many slots there are, so the design should calculate that automatically based on the number of slots. I want each slot to be spaced correctly for an SD card. Each slot should have a small wall to separate cards, which I believe is 3 mm wide.

I don't have a specific library in mind, and would prefer the design to be self-contained if possible, but please make sure the file is well organized and easy to understand.

[Assistant]
SD-CardBox_v1.0.scad:
```
/*[Settings]*/
//Amount of SD-Card slots you want ?
Amount = 15; // [5:1:30]

/*[Extra]*/
// How do you want the sides ?
Sides = "Closed" ; // [Open,Closed,Halfway,Qaurter]

// do you want stackable boxes ?
StackableOnSide = "None" ; // [Left,Right,Both,None]

Device_Lenght = Amount*6+3;

difference () {
    translate ([0,0,0]) cube ([Device_Lenght,31,27]);
    translate ([-1,5,6]) cube ([Device_Lenght+1,21,27]);
    for (a =[3:6:Device_Lenght]){translate ([a,3,3]) cube ([3,25,32]);}
}

if (Sides == "Closed") {
    translate ([0,0,0]) cube ([3,31,27]);
    translate ([Device_Lenght-3,0,0]) cube ([3,31,27]);
}
if (Sides == "Qaurter") {
    translate ([0,0,0]) cube ([3,31,20]);
    translate ([Device_Lenght-3,0,0]) cube ([3,31,20]);
}
if (Sides == "Halfway") {
    translate ([0,0,0]) cube ([3,31,13]);
    translate ([Device_Lenght-3,0,0]) cube ([3,31,13]);
}

if (StackableOnSide == "Left") {
    difference () {
        translate ([0,31,0]) cube ([Device_Lenght,3,25]);
        for (a =[5:20:Device_Lenght]){translate ([a-0.10,31,0]) cube ([3.20,3,25]);}
    }
}
if (StackableOnSide == "Right") {
    for (a =[5:20:Device_Lenght]){translate ([a,-3,0]) cube ([3,3,25]);}
}
if (StackableOnSide == "Both") {
    difference () {
        translate ([0,31,0]) cube ([Device_Lenght,3,25]);
        for (a =[5:20:Device_Lenght]){translate ([a-0.10,31,0]) cube ([3.20,3,25]);}
    }
    for (a =[5:20:Device_Lenght]){translate ([a,-3,0]) cube ([3,3,25]);}
}
```


[User]
I'd like to design a circular knitting loom, and I think OpenSCAD is the perfect tool for the job! I'm envisioning a design where all the important dimensions can be adjusted.

Specifically, I need to be able to change:

*   The overall diameter of the loom.
*   The height of the base of the loom.
*   The number of pegs around the circumference.
*   The diameter of each peg.
*   The height of each peg.
*   And finally, the diameter of a small knob on the top of each peg.

The loom itself will be a simple cylinder with a hollowed-out center, and the pegs will be cylinders placed around the edge, with the option for a small spherical knob on top. The pegs should be evenly spaced. I'd like the knobs to only be added if the knob diameter is larger than the peg diameter, to avoid weird geometry.

Could you generate an OpenSCAD file (or multiple if it makes sense) that implements this parametric design? I'm not using any special libraries right now.

[Assistant]
Circular_Knitting_Loom.scad:
```
// mm
loom_diameter = 75; // [20:200]
// mm
loom_height = 10; // [5:100]
number_of_pegs = 8; // [3:50]
// mm
peg_diameter = 5; // [1:50]
// mm
peg_height = 15; // [5:100]
// mm. If less than Peg Diameter, then knobs will not be generated
knob_diameter = 8; // [0:10]

union() {
  difference() {
    cylinder(h = loom_height, d = loom_diameter, $fa=1, $fs=0.5);
    cylinder(h = loom_height, d = loom_diameter - peg_diameter * 2, $fa=1, $fs=0.5);
  }
  for (i = [0 : number_of_pegs - 1]) {
    rotate(a = i * (360 / number_of_pegs), v = [0, 0, 1]) {
      translate([loom_diameter / 2 - peg_diameter / 2, 0, loom_height]) {
        union() {
          cylinder(h = peg_height, d = peg_diameter, $fa = 1, $fs=0.5);
          if (knob_diameter > peg_diameter) {
            translate([0, 0, peg_height]) {
              sphere(d = knob_diameter, $fa=1, $fs=0.5);
            }
          }
        }
      }
    }
  }
}
```