[User]
I need an OpenSCAD design for a replacement wheel for a travel bag. I've found an example online that does the basic shape, but I'd like to be able to customize it a bit more.

The wheel should be a donut shape, created by taking a sphere, scaling it on the Z-axis to flatten it, and then intersecting it with a cube to give it a flat top and bottom. I need parameters for:

*   **`wheel_diameter`**: The overall diameter of the wheel.
*   **`wheel_width`**: The thickness/height of the wheel (the "donut" height).
*   **`center_hole_diameter`**: The diameter of the central hole for mounting the wheel on an axle.

I'd also like to be able to control the number of facets that make up the circle for the sphere and cylinder operations. I would think this could be done with a `$fn` parameter, but I would also like to control a separate variable, `wheel_segments` that I can set at the beginning. The `wheel_segments` variable should set the value of `$fn` for the sphere and cylinder modules within the design.

The basic shape should be a difference operation that removes a cylinder that is a bit larger than `center_hole_diameter` to make sure it cuts through the entire volume.

I don't need any supports or rafts/brims so please do not add that to the SCAD file. I also do not need the model to be pre-positioned in any way. I intend to print this without any extra supports, using materials like PLA or nylon.

Could you please generate the necessary OpenSCAD file? I don't use any external libraries, so I won't need you to include any, but if you do please let me know which ones you used! Thanks!

[Assistant]
WheelRedArc.scad:
```
// Total Whell size (diameter)
Size = 50;
// Radius of rotated circle / Height of "Donut"
Width = 10;
// Central Hole diameter to mount in millimeters
CenterHoleDiameter=5;

/* [Hidden] */
$fn=50;
difference(){
    intersection(){
        scale([1,1,0.5]) sphere(d=Size,$fn=100);
        cube([Size*2,Size*2,Width],center=true);
    }
    if(CenterHoleDiameter > 0)cylinder(d=CenterHoleDiameter+0.5,h=Width*3,center=true);
}
```


[User]
I need help designing a parametric endstop holder for a Mostly Printed CNC (MPCNC) machine. I've seen some existing designs, but they don't quite fit the microswitches I'm using. I'm familiar with OpenSCAD, but I want to start from scratch with a more flexible, parametric design, making it easier to adapt to different switches and conduit sizes in the future.

The basic design consists of a circular collar that clamps around the conduit, with a tab extending out for mounting the limit switch and another tab extending out for clamping. I'd like the design to be able to be easily customized based on these parameters:

*   **Conduit Outer Diameter (tube_od):** The outer diameter of the conduit the endstop will attach to (e.g., 23.5mm).
*   **Collar Gap (gap):** The width of the gap in the circular collar (e.g., 5mm) that allows for some flex when clamping.
*   **Mounting Hole Diameter (mount_hole_dia):** The diameter of the hole used to tighten the clamp (e.g., 4mm).
*   **Thickness (thickness):** The thickness of the part itself (e.g., 1.5mm).
*   **Height (height):** The height of the printed piece which becomes more like a width after deployment (e.g., 17mm).
*  **Relief Holes:**
    *   **Number of Relief Holes (num_relief_holes):** The number of holes to cut out of the collar to make it more flexible. (e.g. 5)
    *   **Angle of First Relief Hole (relief_hole_a0):** The start angle for the relief holes. (e.g. 150 degrees)
    *   **Angle of Last Relief Hole (relief_hole_a1):** The end angle for the relief holes. (e.g. 390 degrees)
     *   **Diameter of Relief Holes (relief_hole_dia):** The diameter of the relief holes. (e.g. height/2)
*   **Base Tab Length (base_tab_length):** How far the mounting tab extends out (e.g., mount_hole_dia\*2).
*   **Switch Mounting Parameters:**
    *   **Switch Hole Diameter (switch_hole_dia):** The diameter of the mounting holes for the limit switch (e.g., 3.5mm).
    *   **Switch Hole Coordinates (switch_holes):** An array of [x, y] coordinates for the mounting holes, relative to the lower-left corner of the switch mounting area. (e.g., `[[3, 3], [3, 13.4], [25.5, 3], [25.5, 13.4]]`).
    *   **Switch Tab Length (switch_tab_length):** The length of the limit switch mounting tab (e.g., 29mm), sufficient to accomodate all mounting holes.

I'd like a single `endstop_custom.scad` file that includes all the parameters mentioned above. Please make the design fully parametric, meaning that changing any of the above parameters should result in a functional part. Make use of modules and proper indentation to make the code readable. Please do not use external libraries in this solution. I'd prefer a solution that can be copy pasted and used directly in OpenSCAD.

[Assistant]
endstop_custom.scad:
```
//use <tyler.scad>;
$fn=32;

//////////// settings /////////////

// ===== basic settings: you can leave these for most cases =====

tube_od = 23.5; // outer diameter of conduit (mm) -- change this if using int'l edition
gap = 5; // opening size (mm)
mount_hole_dia = 4; // diameter of hole for tightening clamp (mm)
thickness=1.5; // thickness of the piece (mm) -- too high and it will break before it goes around the conduit
height=17; // height when printed; this is more like width when actually deployed (mm)

num_relief_holes = 5; // number of "relief" holes around the collar
relief_hole_a0 = 180-30; // angle of the first hole (deg)
relief_hole_a1 = 360+30; // angle of the last hole (deg)
relief_hole_dia = height/2; // diameter of the relief holes (mm)

base_tab_length = mount_hole_dia*2; // how far out the mounting tab goes (mm)

// ===== limit switch settings: adapt these to your switch =====

switch_hole_dia = 3.5; // diameter of the holes for mounting the limit switch (mm)

// array of XY coordinates for the mounting the limit switch (mm)
// these are measured from the lower-left corner of the limit switch zone of the piece
switch_holes = [
    [3   ,   3],
    [3   ,13.4],
    [25.5,   3],
    [25.5,13.4],
];
switch_tab_length = 29; // how long to make the limit switch tab (mm)
// set this big enough to accomodate all the holes specified above

/////////// basic modules ///////////
// both mirror and not-mirror by the given axis (for concise symmetry)
module bimirror(mr) {
    for (m = [[0,0,0],mr]) mirror(m) children();
}

module square2(size,aligns="LL",radius=0) {
    real_size = len(size) ? size : [size,size];
    tr = [
        aligns[0]=="C" ? 0 : aligns[0]=="R" ? (-real_size[0]/2) : (+real_size[0]/2),
        aligns[1]=="C" ? 0 : aligns[1]=="R" ? (-real_size[1]/2) : (+real_size[1]/2),
    ];
    translate(tr) {
        if (radius>0) {
            inner_size = [for (v=real_size) v-min(radius*2,v)];
            offset(r=radius) square(inner_size, center=true);
        } else {
            square(size,center=true);
        }
    }
}

module cube2(size,aligns="LLL",radius=0,xy_radius=0) {
    real_size = len(size) ? size : [size,size,size];
    tr = [
        aligns[0]=="C" ? 0 : aligns[0]=="R" ? (-real_size[0]/2) : (+real_size[0]/2),
        aligns[1]=="C" ? 0 : aligns[1]=="R" ? (-real_size[1]/2) : (+real_size[1]/2),
        aligns[2]=="C" ? 0 : aligns[2]=="R" ? (-real_size[2]/2) : (+real_size[2]/2)
    ];
    translate(tr) {
        if (xy_radius>0) {
            inner_size = [for (v=real_size) v-min(xy_radius*2,v)];
            linear_extrude(real_size[2], center=true) offset(r=xy_radius) square([inner_size[0],inner_size[1]], center=true);
        } else if (radius>0) {
            if (radius*2 >= max(real_size)) {
                resize(real_size) sphere(1);
            } else {
                inner_size = [for (v=real_size) v-min(radius*2,v)];
                minkowski() {
                    cube(inner_size,center=true);
                    sphere(r=radius);
                }
            }
        } else {
            cube(real_size,center=true);
        }
    }
}

////////// actual figure /////////////

difference() {

    // circular collar
    linear_extrude(height, convexity=5) difference() {
        circle(d=tube_od+2*thickness);
        circle(d=tube_od);
        square2([gap,50],aligns="CL");
    }

    // relief holes
    translate([0,0,height/2]) for (i=[0:num_relief_holes-1]) {
        pct = num_relief_holes==1 ? 0.5 : i/(num_relief_holes-1);
        theta = relief_hole_a0 + (relief_hole_a1-relief_hole_a0)*pct;
        rotate([0,90,theta]) cylinder(d=relief_hole_dia,h=tube_od+thickness+1);
    }
}

// mounting tab
bimirror([1,0]) translate([gap/2,tube_od/2,0]) {
    difference() {
        cube2([thickness,base_tab_length+thickness,height],aligns="LLL");
        translate([0,mount_hole_dia+thickness,height/2]) rotate([0,90]) cylinder(d=mount_hole_dia,h=20,center=true);
    }
}

// limit switch part of the tab
translate([gap/2,tube_od/2+base_tab_length+thickness,0]) {
    difference() {
        cube2([thickness,switch_tab_length,height],aligns="LLL");
        for (switch_hole = switch_holes) {
            translate([0,switch_hole[0],switch_hole[1]]) rotate([0,90]) cylinder(d=switch_hole_dia,h=20,center=true);
        }
    }
}

```


[User]
Hey there, I'm looking to get a parametric design for a 5.25" PC bay drawer created in OpenSCAD. I've got some specific dimensions and features in mind, and would like the drawer to be customizable for different PC cases.

Essentially, the design needs to consist of two main parts: the drawer itself and the mounting bracket that fits into the PC's drive bay.

For the mounting bracket, I'd like to be able to specify:
*   The overall width (x)
*   The length (y), going into the PC case
*   The height (z) of the bracket, which is the same height as the front panel.
*   A wall thickness for the bracket itself (mountWallThickness)
*   The number of mounting screw holes (mountHoles).
*   The diameter and depth of the mounting screw holes (mountScrewDiameter and mountScrewLength, respectively).

The drawer itself needs to have a few customizable options too:
*   A tolerance for the drawer so it slides nicely into the bracket (drawerTolerance).
*   The dimensions of the internal space of the drawer (width, length, height), which will be derived from the bracket's dimensions and the wall thickness (wallThickness) and the drawer tolerance above.
*   A wall thickness for the drawer itself.
*   Several options for the front of the drawer:
    *   A tab that extends from the front of the drawer (tabOption = 0). I would like to be able to set the tab thickness (tabThickness), a radius for rounded edges, (tabRadius), and the depth (tabDepth) of that tab.
    *   A handle that is essentially a semi-circular cutout (tabOption = 1). Here I would also like to set the tabThickness, tabRadius, and tabDepth.
    *   A knob that protrudes from the front (tabOption = 2).  I would need to be able to set the knob diameter (knobDiameter) and depth(tabDepth)
    *   A simple hole through the drawer face (tabOption = 3), with a diameter (holeDiameter).
    *   No tab or handle or hole at all (tabOption = 4).
*   An option to add a pattern to the front face of the drawer (drawerFaceOption). If selected, I would need to be able to set the spacing between the shapes (frontSpacing), their diameter (frontDesignDiameter), and the depth they protrude (frontDesignDepth).

I'd also like to have a "part" option that would allow me to display the mount, the drawer, or both at once.

I don't need any libraries other than the standard OpenSCAD stuff. Thanks so much!

[Assistant]
pcBayDrawer.scad:
```
/***********************************************************************
Name ......... : pcBayDrawer.scad
Description....: 5.25" PC Bay Drawer
Author ....... : Garrett Melenka
Version ...... : V1.0 2016/07/10
Licence ...... : GPL
***********************************************************************/
//Part Display Options
part = 1;//[0:All, 1:drawer, 2: Pc mount]

//Dimensions measured from Antec 300 PC Case
//width of drawer mount bracket
x=146;
//length of drawer mount bracket[50:5:150]
y=80;
//height of drawer mount bracket
z=42;

//thickness of drawer mount walls
mountWallThickness = 4;
//Add tolerance to bin dimensions so it slides easily into the mount
drawerTolerance = 1;

//Dimensions of Drawer
//Width of drawer
width = x-mountWallThickness-drawerTolerance;
//Height of Drawer
height = z-mountWallThickness-drawerTolerance;
//Length of Drawer
length = y-mountWallThickness-drawerTolerance;
//specify thickness of drawer walls
wallThickness = 2;

//mounting screws to connect the drawer mount to ATX case
//diameter of mounting screw
mountScrewDiameter = 2.75;
//depth of mounting screw
mountScrewLength = 5;
//number of screws to add to the drawer mount bracket
mountHoles = 2;

//Tab Option
tabOption = 3; //[0:tab, 1:handle, 2:knob, 3: half circle hole, 4: No Tab / Handle]
//Thickness of Tab/ handle
tabThickness = 5;
//Radius of Tab / handle
tabRadius = 30;
//Depth of tab/ handle
tabDepth = 10;
// knob diameter if tabOption == 2
knobDiameter = 20;
// hole diameter if tabOption == 3
holeDiameter = 20;
// Drawer Face Option
drawerFaceOption = 0; //[0:No pattern on drawer face, 1:pattern on drawer face]
//spacing for front face pattern
frontSpacing = 5;
//diameter of front face pattern
frontDesignDiameter = 2;
//depth of front face pattern
frontDesignDepth = 2;

//Drawer for PC Case
module pcBayDrawer()
{
    union()
    {
    difference()
    {
    translate([0,0,-height*0.5]){
    cube(size = [width, length, height], center = true);
    }

    translate([0,0,-(height-wallThickness)*0.5]){
    cube(size = [width-wallThickness, length-wallThickness, height], center = true);
    }

    if(drawerFaceOption ==1)
    {
    for (j = [-height:frontSpacing:height]){
    for (i = [-width:frontSpacing:width])
    {

    translate([i,length*0.5+0.5, -2+j])
    {
    rotate([90,0,0])
    {
    cylinder(h = frontDesignDepth, r = frontDesignDiameter*0.5, center = true);
    }
    }
    }
    }
    }
    // hole option
    if (tabOption ==3)
    {
        translate([0,length*0.5, -height*0.5])
        {
        rotate([90, 90, 0])
        {

        difference(){
        cylinder(h = wallThickness*2, r = holeDiameter*0.5, center = true);

        translate([holeDiameter*0.5, 0, 0]){
        cube(size = [holeDiameter, holeDiameter, wallThickness*2], center = true);
        }

        }
        }
        }
        }
    }

    // Drawer Tab Option
    if (tabOption ==0){
    translate([0, length*0.5+tabDepth*0.5, -height*0.5])
    {
    union()
    {
    cube(size = [tabDepth*2,tabDepth,tabThickness], center = true);

    translate([0,tabDepth*0.5,0]){
    cylinder(h=tabThickness, r=tabDepth, center = true);
    }
    }
    }
    }

    //Drawer Handle Option
    if (tabOption == 1)
    {

       translate([0,length*0.5,-height*0.5])
       {

       difference(){
       cylinder(h = tabDepth, r = tabRadius, center = true);

       cylinder(h = tabDepth, r = tabRadius-tabThickness, center = true);

       translate([0,-tabRadius*0.5,0])
       {
       cube(size = [tabRadius*2, tabRadius, tabDepth], center = true);
       }
        }
    }

    }

    //Drawer Knob Option
    if (tabOption ==2)
    {

        translate([0,length*0.5+tabDepth*0.5,-height*0.5])
        {
        rotate([-90,0,0])
        {
        hull(){
        cylinder(h = tabDepth, r=knobDiameter*0.5, center = true);

        translate([0,0,tabDepth]){
        cylinder(h = tabDepth, r=knobDiameter*0.5+5, center = true);
        }
        }
        }
        }

        }

    }

}
//Mount for PC Case
module pcBayMount()
{
    difference()
    {
    cube(size = [x, y, z], center = true);
    translate([0,(y-length)*0.5,0]){
    cube(size = [x-mountWallThickness, y-mountWallThickness, z-mountWallThickness], center = true);
    }

    mountHoleSpacing = (y-20) / mountHoles;
    echo(mountHoleSpacing);

    //for(i = [(-y*0.5 + 10):mountHoleSpacing:(y*0.5-10)])
    for(i = [-mountHoles:1:mountHoles])
    {

    translate([x*0.5-mountScrewLength*0.5, i*mountHoleSpacing, -height*0.25]){
    rotate([0,90,0]){
    cylinder(h=mountScrewLength, r = mountScrewDiameter*0.5, center = true);
    }
    }

    translate([x*0.5-mountScrewLength*0.5, i*mountHoleSpacing, height*0.25]){
    rotate([0,90,0]){
    cylinder(h=mountScrewLength, r = mountScrewDiameter*0.5, center = true);
    }
    }

    translate([-x*0.5+mountScrewLength*0.5, i*mountHoleSpacing, -height*0.25]){
    rotate([0,90,0]){
    cylinder(h=mountScrewLength, r = mountScrewDiameter*0.5, center = true);
    }
    }

    translate([-x*0.5+mountScrewLength*0.5, i*mountHoleSpacing, height*0.25]){
    rotate([0,90,0]){
    cylinder(h=mountScrewLength, r = mountScrewDiameter*0.5, center = true);
    }
    }

    }
    }

}

// Display Drawer and Mount
if (part == 0){

$fn = 60;
color("green")
translate([0,0,height*0.5]){
pcBayDrawer();
}

%pcBayMount();
}

// Display Drawer
if (part == 1)
{
    $fn = 60;
color("green")
//translate([0,20,height*0.5])
rotate([0,0,180])
    {
pcBayDrawer();
}
}
// Display Mount
if (part == 2)
{
  $fn = 60;
  pcBayMount();
}
```


[User]
Hey, I'm looking to create a 3D model of a traditional "Boton Charro" - it's a type of button or charm from Spain. I'd like the OpenSCAD code to be parametric so I can customize it easily.

Here's what it should include:

*   **Base:** A flat, cylindrical base with a given radius and height.
*   **Main Body:**  A sphere, mostly embedded in the base with a portion of it protruding. It should have a number of smaller sphere "balls" distributed around it.
*   **Balls:** These are smaller spheres, with a radius determined based on the main sphere radius and the number of balls. They should be evenly spaced around the main sphere's circumference. I'd also like a second ring of smaller balls halfway between the center and outer balls.
*   **Inner Rings:**  There should be optional inner rings, located above the balls.
*   **Outer Ring:** There should be an optional outer ring, located around the balls.
*   **Keyring Option:**  An optional keyring loop/cylinder that extends from the base.
*   **Resolution/Facets:** Let's allow for a variable to control the resolution, or number of facets of the spheres and cylinders used.

Here are the parameters I would need to control in the OpenSCAD code:

*   `Radius`: (Float) Radius of the main cylindrical base (and in some part the main body).
*   `Balls`: (Integer) The number of small balls around the main body.
*  `KeyRing`: (Boolean) Whether or not to include the keyring loop (1 for yes, 0 for no).
*   `BaseHeight`: (Float) Height of the flat cylindrical base.
*   `InnerRings`: (Boolean) Whether to include inner rings (1 for yes, 0 for no).
*   `OuterRing`: (Boolean) Whether to include an outer ring (1 for yes, 0 for no).
*   `Facets`: (Integer) Number of facets to use for all spheres and cylinders.

I think that should cover it. Could you please create an OpenSCAD file (or files) for this? Also please use the OpenSCAD standard library functions only.

[Assistant]
Boton_Charro.scad:
```
// Boton charro by Magonegro JUL-2016
// Radius (mm):
Radius=15;
// Number of balls:
Balls=12;
// Keyring or not:
KeyRing=1; // [0:No, 1:Yes]
// Height of the base:
BaseHeight=3;
// Inner Rings or not:
InnerRings=1; // [0:No, 1:Yes]
// Inner Rings or not:
OuterRing=0; // [0:No, 1:Yes]
// Resolution (typ. 30):
Facets=30;

/* [Hidden] */
Angle=360/Balls;
BallRadius=(3.1415926535*Radius/Balls)/1.2;

module Ball(X,Y,R)
{
    translate([X,Y,0])
    union()
    {
    difference()
        {
        sphere(r=R,center=true,$fn=Facets);
        translate([0,0,-R]) cylinder(r=R,h=R,$fn=Facets);
        }
    translate([0,0,-BaseHeight])
        cylinder(r=R,h=BaseHeight,$fn=Facets);
    }
}

module Ring(X,R,H)
{
translate([0,0,H])
rotate_extrude(convexity = 10,$fn=Facets)
translate([R, 0, 0])
    union()
    {
    circle(r = X, $fn = Facets);
    translate([-X,-(BaseHeight+H)])
        square([X*2,BaseHeight+H]);
    }
}

// Main
union()
{
    translate([0,0,-BaseHeight])
    cylinder(r=Radius,h=BaseHeight,$fn=Facets);
    difference()
    {
    translate([0,0,-Radius/1.3]) sphere(r=Radius*1.2,centre=true,$fn=Facets);
    translate([0,0,-Radius*2-BaseHeight]) cube([Radius*4,Radius*4,Radius*4],center=true);
    }
    translate([0,0,Radius/2.5]) Ball(0,0,BallRadius);
    for(i=[0:Balls-1])
    {
        Ball(Radius*cos(i*Angle),Radius*sin(i*Angle),BallRadius);
    }
    for(i=[0:Balls-1])
    {
        translate([0,0,Radius/3.5]) Ball(Radius/2*cos(i*Angle),Radius/2*sin(i*Angle),BallRadius/1.7);
    }
    if(InnerRings==1)
    {
    translate([0,0,Radius/5.5]) Ring(1,Radius-BallRadius-1,BallRadius/3);
    translate([0,0,Radius/3]) Ring(1,BallRadius+2,BallRadius/4);
    }
    if(OuterRing==1)
    {
    Ring(1,Radius+BallRadius-1,BallRadius/3);
    translate([0,0,-BaseHeight])
    cylinder(r=Radius+BallRadius-1,h=BaseHeight,$fn=Facets);
    }
    if(KeyRing==1)
    {
        translate([Radius+BallRadius+3,0,-BaseHeight])
        difference()
        {
        cylinder(r=6,h=BaseHeight,$fn=Facets);
        cylinder(r=3,h=BaseHeight,$fn=Facets);
        }
    }
}

```


[User]
Hi there,

I'm looking to design a wall mount for my Klipsch R-25C center channel speaker. I've got some specific requirements and would love some help creating an OpenSCAD file that I can customize.

Essentially, I need a flat mounting plate that attaches to the wall, and a tab that the speaker itself mounts onto using its existing terminal screws. The speaker should be offset from the wall by the thickness of the mounting tab.

Here are the specific parameters that need to be configurable:

*   **Mounting Plate Dimensions:**
    *   `mountingPlateHeight`: The height of the wall-mounting plate.
    *   `mountingPlateWidth`: The width of the wall-mounting plate.
    *   `mountingPlateThickness`: The thickness of the wall-mounting plate.
    *   `mountingPlateCornerRadius`: The radius of the rounded corners on the plate.
    * `mountingPlateScrewHoleDiameter`: diameter of mounting screw holes
    *   `mountingScrewHeadDiameter`: diameter of the head of mounting screw
    * `mountingScrewHeadThickness`: thickness of mounting screw head
*   **Mounting Tab Dimensions:**
    *   `mountingTabHeight`: The height of the mounting tab where the speaker sits.
    *   `mountingTabThickness`: The thickness of the mounting tab; this is key for supporting the speaker and should be reasonably beefy.
    *   `mountingTabWidth`:  The width of the mounting tab, which should be calculated based on the screw head dimensions to provide a secure fit. It should be twice the tab thickness + the mounting screw head diameter.
*   **Screw and Terminal Positioning:**
    *   `mountingScrewDiameter`: The diameter of the speaker's terminal screws.
    *   `mountingScrewWidthBottom`: The horizontal distance between the two lower mounting screws on the speaker.
    *   `mountingScrewWidthTop`: The horizontal distance between the two upper mounting screws on the speaker.
    *   `mountingScrewHeightSeparation`: The vertical distance between the upper and lower mounting screws on the speaker.
    *   `terminalHoleWidth`: Width of the cutout in the mounting plate for the speaker's terminal block.
    *   `terminalHoleHeight`: Height of the cutout in the mounting plate for the speaker's terminal block.
    * `terminalHoleCornerRadius`: corner radius of cutout in mounting plate for the speaker's terminal block.

I need a screw hole at each of the positions described by `mountingScrewWidthBottom`, `mountingScrewWidthTop` and `mountingScrewHeightSeparation` such that they align with the existing screw positions on the back of the speaker. The mounting tab should be placed just above the hole for the speaker terminals and should use the two lower screw holes. There should also be a recess for the head of the screw and a smaller hole for the shaft.

I'd like the design to be parametric, so I can easily adjust the dimensions if needed. I'm familiar with the basics of OpenSCAD, and I think I'll be able to adjust the provided code to create other variants.

I think we'll need to use the minkowski and hull operations for some of the more complex shapes, but I don't know enough to be able to write the whole thing myself. I don't need to use any specific libraries or modules.

Let me know if you need any more details!

[Assistant]
Klipsch_R-25C_Speaker_Mount.scad:
```
// model: Klipsch R-25C Center Channel Speaker Wall Mount
// author: fiveangle@gmail.com
// date: 2017feb07
// ver: 1.0.1
// notes: Uses original speaker terminal mounting screws so no alterations to the speaker are required
// history:
//     -1.0.1 - 2017feb07 - Fixed incorrect calculation that resulted in mountingTab being thinner than expected
//                        - Increased mountingTabThickness from default 3 to 4.3 to ensure adequate strength when
//                          installing with long mounting screw (to get it to angle downward) which could pull
//                          layers apart from the unexpected increased horizontal load
//     -1.0.0 - 2015jul11 - Released
//
// adjust to increase/decrease polygon count at expense of processing time
$fn = 200;

// Sets taper relative to mountingTabHeight
mountingScrewHeadThickness =10;
mountingScrewHeadDiameter = 10; // [8:15]
mountingTabHeight = 10;
mountingScrewDiameter = 4;
mountingPlateHeight = 130;
mountingPlateWidth = 112;

// Mounting plate thickness also sets mounting tab body and head retaining tabs thicknesses (don't make bigger than 3mm or you will probably need longer screws than the stock)
mountingPlateThickness = 3;
mountingTabThickness = 4.3;

// Don't change
mountingPlateCornerRadius = 15;
mountingPlateScrewHoleDiameter = 4;
mountingTabWidth = 2 * mountingTabThickness + mountingScrewHeadDiameter;
mountingScrewWidthBottom = 94;
mountingScrewWidthTop = 34;
mountingScrewHeightSeparation = 78;
terminalHoleWidth = 65;
terminalHoleHeight = 50;
terminalHoleCornerRadius = 5;

module ScrewHole(x = 0, y = 0) {
    translate([x, y, 0]) {
        cylinder(d = mountingPlateScrewHoleDiameter, h = mountingPlateThickness);
        translate([0, 0, 3]) {
        cylinder(d = mountingScrewHeadDiameter, h = mountingPlateThickness);
        }
    }
}

// mounting tab
translate([mountingScrewWidthBottom / 2, terminalHoleHeight + terminalHoleCornerRadius + mountingTabWidth / 2, mountingPlateThickness]) {
    // cube([mountingTabWidth, mountingScrewHeightSeparation + mountingPlateCornerRadius - terminalHoleHeight - terminalHoleCornerRadius, mountingPlateThickness + mountingTabHeight]);
    difference() {
        // body of raised mounting tab
        hull() {
            cylinder(d = mountingTabWidth, h = mountingTabHeight);
            translate([0, mountingScrewHeightSeparation + mountingPlateCornerRadius - terminalHoleHeight - terminalHoleCornerRadius - mountingTabWidth, 0]) cylinder(d = mountingTabWidth, h = mountingTabHeight - (mountingTabHeight - mountingScrewHeadThickness));
        }

        // screw head hollow
        hull() {
            cylinder(d = mountingScrewHeadDiameter, h = mountingTabHeight - mountingTabThickness);
            translate([0, mountingScrewHeightSeparation + mountingPlateCornerRadius - terminalHoleHeight - terminalHoleCornerRadius - mountingTabWidth, 0]) cylinder(d = mountingScrewHeadDiameter, h = mountingTabHeight - mountingTabThickness - (mountingTabHeight - mountingScrewHeadThickness));
        }

        // screw slot recess
        cylinder(d = mountingScrewHeadDiameter, h = mountingTabHeight);
        hull() {
            cylinder(d = mountingScrewDiameter, h = mountingTabHeight);
            translate([0, mountingScrewHeightSeparation + mountingPlateCornerRadius - terminalHoleHeight - terminalHoleCornerRadius - mountingTabWidth, 0]) cylinder(d = mountingScrewDiameter, h = mountingTabHeight);
        }

    }
}

difference() {
    // plate
    linear_extrude(height = mountingPlateThickness) { // need to extrude 2D minkowski sum rather than plate and cyclinder, otherwise plate will increase in thickness by the z-axis minkowski freedom (woops !)
        minkowski() {
            square([mountingScrewWidthBottom, mountingScrewHeightSeparation, ]);
            circle(r = mountingPlateCornerRadius);
        }
    }

    // mounting holes
    ScrewHole(0, 0);
    ScrewHole(mountingScrewWidthBottom, 0);
    ScrewHole((mountingScrewWidthBottom - mountingScrewWidthTop) / 2, mountingScrewHeightSeparation);
    ScrewHole((mountingScrewWidthBottom - mountingScrewWidthTop) / 2 + mountingScrewWidthTop, mountingScrewHeightSeparation);

    // hole for speakter terminals
    translate([(mountingScrewWidthBottom - terminalHoleWidth) / 2, 0, 0]) {
        minkowski() {
            cube([terminalHoleWidth, terminalHoleHeight, mountingPlateThickness]);
            cylinder(r = terminalHoleCornerRadius, h = mountingPlateThickness);
        }
    }
}
```


[User]
I'm looking to create a unique 3D-printable design, and I'd like your help to generate the OpenSCAD code for it. The concept is based on the intersection of two characters, similar to the example in the attached image, but I want it to be much more flexible.

Essentially, I want to design a 3D block where the shape is formed by the intersection of two different characters extruded at a 90-degree angle to each other. It's like taking the letter "T", extruding it, then taking the number "7", rotating it 90 degrees, extruding that, and then keeping only the parts where they overlap.

Here's what I'm looking for in the OpenSCAD design:

1. **Parametric Design:** The ability to easily change the two characters being used. Ideally, I should be able to input any two single characters (letters, numbers, or symbols) and have the code generate the corresponding 3D block.
2. **Font Customization:** I'd like to be able to adjust the font of the characters, including options for font family (like Arial, Times New Roman, etc.), style (bold, italic), and size.
3. **Extrusion Control:**  The ability to control the extrusion height of each character independently, just in case I need to make adjustments for certain character combinations.
4. **Centering:** The characters should be centered within the block.
5. **Rotation:** One of the characters should be automatically rotated 90 degrees relative to the other before extrusion and intersection.

I know this will involve using the `linear_extrude()` and `text()` functions, as well as `rotate()`, and `intersection()` in OpenSCAD. Also, it is likely that you will need to use the MCAD library.

[Assistant]
tofs_3d_letter_block.scad:
```
character1="3";
character2="D";

intersection() {
rotate([90,0,0]) linear_extrude(height = 100, center=true) text(character1, font = "arial:style=Bold", "center", size = 10, valign="center", halign="center");

rotate([90,0,90]) linear_extrude(height = 100, center=true) text(character2, font = "arial:style=Bold", "center", size = 10, valign="center", halign="center");
}
```


[User]
Hey, I'm working on a project where I need some wire looms, and I'd like to be able to customize them easily. I've seen some designs where the loom is basically a hollowed-out triangle with a toothed top edge for inserting wires, and that sounds perfect.

I need a parametric OpenSCAD design that will let me adjust the length, width, and height of the loom, and it needs to have a few specific features:

*   **Triangular Profile:** The base shape should be a hollow triangle, kind of like a 3-sided cylinder.
*   **Toothed Top Edge:** The top edge needs to have regularly spaced cutouts that look like sawteeth or slots. These will let me easily push wires into the loom.
*   **Screw Holes:**  I want to have some holes along the bottom for mounting the loom with screws.
*   **Side Exit Holes:** Also, it would be great to have angled holes along the sides to let wires exit the loom at various points, like you see in this wire loom design.

For the parameters, I need:

*   `length`:  This should control the overall length of the loom.
*   `width`: This parameter adjusts the base width of the triangle.
*   `height`:  This changes the vertical height of the triangle.

The design should generate a single part, and I'm looking for it to be reasonably efficient and not too slow to render. It would also be great if the design made use of the MCAD library where appropriate. I'd like to avoid using any other additional libraries if possible. The way the resizing was done in the example I was looking at seemed to have slow renders, so I'd prefer something with better performance.

Could you help me generate the necessary OpenSCAD code?

[Assistant]
wire_tube_scaled_cust.scad:
```
//WIRE LOOM by Spicer
//Customizer version
//Default length is 120mm about 4 3/4 inches half of what was set to print on my 2016 Creator Pro diagonally
//Default width/height is very small at 4mm 3 sided cylinder
//but that is why the options to scale the length, width, and height.
/* [Global] */
/*Customizer variables begin */

/* [LENGTH IN MM ]  "(size approximate)" */
// 180mm default length increased to a max of 480mm (how are ever going to print that?
 length = 1;//[1:120mm,1.5:180mm,2:240mm,3:360mm,4:480mm]
/* [BASE WIDTH IN MM]   "(size approximate)" */
//Large values are slow to calculate, be patient!
 width = 1;//[1:≈4mm,2:≈8mm,3:≈12mm,4:≈16mm,5:≈20mm,6:≈24mm]
/* [BASE TO PEAK HEIGHT IN MM]   "(size approximate)" */
//Large values are slow to calculate, be patient!
 height = 1;//[1:≈4mm,2:≈8mm,3:≈12mm,4:≈16mm,5:≈20mm,6:≈24mm]

// Customizer variables end

 rotate([180, 0, 0]) {
 M = [ [ length, 0, 0, 0 ],
       [ 0, width, 0, 0 ],
       [ 0, 0, height, 0 ],
       [ 0, 0, 0, 1 ] ] ;
 multmatrix(M) {
translate ([0, 0, -2]){
difference() {

//create triangle and make it hollow
rotate([0,90,0]) cylinder (120, 4, 4, $fn=3);
translate ([-0.5, 0, 0]) rotate([0,90,0]) cylinder (120.5, 2.75, 2.75, $fn=3);

//saw tooth the top to allow wire insert
for(sr = [1.725:8:120])  //slot right
translate ([sr-2, -3,-4]) cube ([4.95, 3, 2]);

for(sl = [5.725:8:120])  //slot left
translate ([sl-2, 0,-4]) cube ([4.95, 3, 2]);

//place holes in bottom for screws
for(cr = [1.75:4:120])  //circle
translate([cr,0,.5])  cylinder($fn = 15, h=2, r1=1.25/length, r2=.5/length);

// place holes in sides for wire exits
for(hr = [1.75:8:118])  //slot right
translate ([hr, -3,-1]) rotate ([-45,0,0]) cylinder ($fn = 12, h=2.25, r=1);

for(hl = [5.75:8:118])  //slot left
translate ([hl, 3,-1]) rotate ([45,0,0]) cylinder ($fn = 12, h=2.25, r=1);
}
}
}
}
```


[User]
Hi, I'm looking for some help designing a doorstop in OpenSCAD. I need it to be parametric so I can adjust it for different door thicknesses and stuff.

Basically, it needs to be a C-shaped piece that fits over the edge of a door. The main body should be a rectangular prism with a cutout on one side to allow it to clamp onto the door. The cutout should be a rectangular prism as well, leaving a channel for the door. I need to be able to adjust the door thickness and the length of the doorstop itself.

I'd also like to add some optional features. One would be two small cylindrical "tensioners" on each side of the door channel, to make the fit a little tighter. These should be optional, and I should be able to control their diameter and location a little. The other optional feature would be some small "guides" on either side of the door channel on the top of the piece. These would just be wedges to make it easier to slide the doorstop onto the door. The guides should also be optional, and their size should be adjustable.

I'm pretty new to OpenSCAD, so please generate the code from scratch. I'm hoping you can give me a single `.scad` file with all the parameters for these features. I don't want to use any libraries that require a lot of dependencies, but if something like `BOSL` or `BOSL2` is really needed for this project, that would be fine. But please try to keep it simple if you can.

I want parameters like:
-   `door_thickness`: the thickness of the door the stop will fit over.
-   `length`: the overall length of the doorstop (not including the guides, which might extend past this).
-   `height`: the height of the doorstop.
-   `stop_size`: the overall diameter of the cylinder used for the cutout that creates the C shape.
-   `tensioner_diameter`: the diameter of the cylindrical tensioners.
-   `part_thickness`: the thickness of the material the doorstop is made of.
-   `door_guides`: a boolean value to turn the guides on or off.
-   `door_tensioners`: a boolean value to turn the tensioners on or off.
-   `guide_height`: the height of the wedges.
- `guide_width`: the base width of the guides.

I hope that makes sense. Let me know if you need any clarification. Thanks!

[Assistant]
Doorstop3.scad:
```
door_thickness = 35.5;
length = 60; // not overall length, doesn't include the guides
height = 10;
stop_size = 20;
tensioner = 5;
part_thickness = 7;
door_guides = true;
door_tensioners = true;

cube([(door_thickness + (part_thickness)), (part_thickness/2), height]);

cube([(part_thickness/2), (length), height]);

translate([(door_thickness + (part_thickness/2)),0,0])
cube([(part_thickness/2), (length), height]);

difference(){

translate([0,part_thickness/2, height/2])
    color("blue")
    cylinder(r=stop_size/2,h=height,center=true)
     //cube([door_thickness + part_thickness, (length - part_thickness) + (part_thickness/2), height])

    ;

translate([part_thickness/2,part_thickness/2,0])
    color("Orange")
    cube([door_thickness, (length - part_thickness), height])
    ;
}

if (door_tensioners) {
//tensioner 1
translate([(part_thickness/2)+door_thickness,
            ((length - part_thickness)+(part_thickness/2))-(tensioner/2),
            (height/2)])
         color("red")
            cylinder(r=tensioner/2,h=height,center=true);

//tensioner 2
translate([part_thickness/2,
            ((length - part_thickness)+(part_thickness/2))-(tensioner/2),
            (height/2)])
        color("green")
            cylinder(r=tensioner/2,h=height,center=true);
}

//Guides to help put onto door
module guide0(l, w, h, trnx, trny){

translate([trnx,trny,height])
    rotate([90,90,180])

    color("pink")
    polyhedron(
               points=[[0,0,0], [l,0,0], [l,w,0], [0,w,0], [0,w,h], [l,w,h]],
               faces=[[0,1,2,3],[5,4,3,2],[0,4,5,1],[0,3,4],[5,2,1]]
               );
}
module guide1(l, w, h, trnx, trny){
translate([trnx,trny,0])

    rotate([180,270,90])

    color("purple")
    polyhedron(
               points=[[0,0,0], [l,0,0], [l,w,0], [0,w,0], [0,w,h], [l,w,h]],
               faces=[[0,1,2,3],[5,4,3,2],[0,4,5,1],[0,3,4],[5,2,1]]
               );
}

if (door_guides) {
    if (door_tensioners) {
        guide0(height, (part_thickness/2)+(tensioner/2), (tensioner*3),
                (part_thickness/2)+(tensioner/2),
                ((length - part_thickness)+(part_thickness/2))-(tensioner/2));

        guide1(height, (part_thickness/2)+(tensioner/2), (tensioner*3),
                (part_thickness/2)-(tensioner/2)+door_thickness,
                ((length - part_thickness)+(part_thickness/2))-(tensioner/2));
    }
    else{
         guide0(height, (part_thickness/2), (tensioner*3),
                (part_thickness/2),
                ((length - part_thickness)+(part_thickness/2)));

         guide1(height, (part_thickness/2), (tensioner*3),
                (door_thickness+part_thickness/2),
                ((length - part_thickness)+(part_thickness/2)));

    }
}

//difference(){
//  cube([door_thickness + part_thickness, (length - part_thickness) + (part_thickness/2), height]);
 // translate([part_thickness/2,part_thickness/2,0]) color("Orange") cube([door_thickness, (length - part_thickness), height]);
//}

```


[User]
I need a parametric OpenSCAD design for a D-ring. The D-ring should be fully customizable, allowing me to adjust the cross-section, outer width, the length of the straight sides, and the angle of the arc for the curved part.

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

*   **Cross-section:** This parameter will determine the thickness of the ring. I should be able to specify a value between 2 and 20 mm.
*   **Outer Width:** This will be the overall width of the D-ring, measured from the outermost points. I need to be able to set this between 6 and 200 mm.
*   **Side Length:** This parameter controls the length of the straight sides of the D, measured from the base up to where the curved arc begins. I'd like to adjust this from 0 to 150 mm.
*   **Included Angle:**  This determines the extent of the arc on the curved end of the D-ring. A smaller angle will result in a less pronounced curve. I need to be able to select an angle between 60 and 180 degrees, in 5-degree increments.

The design should be printable without supports, so it should have a flat bottom. The top should also be flat for symmetry. It needs to be strong when printed with high infill, but it's absolutely **not** intended for climbing or any load-bearing applications that could risk life or limb. It is appropriate for paracord keychains or backpack straps.

I'd like the design to be centered at the origin. The main components should be the base, the two straight sides, and the curved end, all unioned together. The curved end should use a `rotate_extrude` for a smooth curve. Please use the `MCAD` library for this design.

[Assistant]
Simple_D-Ring_R03.scad:
```
//D Ring - Simple D Ring - likely want in different sizes

//REV01 - initial version - will likely need to do different sizes
//REV02 - Larger size - 5 mm cross section - 30 mm wide
//REV03 - Customizable version - default values - cs=5, width=30, side=16, angle=115

//Variable requests for Thingiverse Customizer - Real word names here, but changed to shorter variable names below for easier use in code

//cross section of D-Ring
cross_section=5;//[2:20]

//outer dimension of D-Ring width
width_od=30;//[6:200]

//length of side from base up to start of arc
side_length=16;//[0:150]

//included angle of loop for and arc
included_angle=115;//[60:5:180]

//variables set to constants or from user input
cs=cross_section;//cross section
width=width_od;//base width
side=side_length;//side length
angle=included_angle;

$fn=24*1;//facets for spheres

//calculated variables
radius=(width-cs)/(2*sin(angle/2));
halfcord=(width-cs)/2;
offcenter=sqrt((radius*radius)-(halfcord*halfcord));

//move complete assembly to z=0 and close to center of x-y
translate([-halfcord,-side/2,cs/2]){//hole part translate

difference(){
	union(){
		//base part
		hull(){
			scale([1,1,1.2])
			sphere(d=cs);
			translate([width-cs,0,0])
			scale([1,1,1.2])
			sphere(d=cs);
		}
		//one of the sides
		hull(){
			scale([1,1,1.2])
			sphere(d=cs);
			translate([0,side,0])
			scale([1,1,1.2])
			sphere(d=cs);
		}
		//the other side
		hull(){
			translate([width-cs,0,0])
			scale([1,1,1.2])
			sphere(d=cs);
			translate([width-cs,side,0])
			scale([1,1,1.2])
			sphere(d=cs);
		}

		//curved end
		intersection(){
			//rect hull of sphere to keep part of rot extrude
			if(angle>160)
			translate([-cs/2,side,-cs/2-1])
			cube([width+cs,width+cs,cs+2]);
			else
			hull(){
				translate([0,side,0])
				scale([1,1,1.2])
				sphere(d=cs);
				translate([width-cs,side,0])
				scale([1,1,1.2])
				sphere(d=cs);
				translate([0,side+width/2,0])
				scale([1,1,1.2])
				sphere(d=cs);
				translate([width-cs,side+width/2,0])
				scale([1,1,1.2])
				sphere(d=cs);
			}
			//rotate extrude to create end arc
			translate([(width-cs)/2,(side-offcenter),0])
			rotate_extrude($fn=8640/angle)
			translate([radius, 0, 0])
			scale([1,1.2])
			circle(d=cs);
		}

	}//union end
translate([width/2,side/2,-cs*2.5])
cylinder(r=width+side,h=cs*2);
translate([width/2,side/2,cs/2])
cylinder(r=width+side,h=cs*2);

}//difference end

}//hole part translate end
```


[User]
I'm working on a project where I need to generate some 3D models of some fictional creatures - something like ancient, pre-Cambrian life, but alien. I want them to have a body plan with radial symmetry - kind of like a sea urchin or starfish. I'd like to be able to control the number of symmetrical segments, and each segment should be separated by a groove.

I also want the ability to vary the shape of the creature, so it would be good if I could control things like the length, radius, and curvature of the body. Ideally, the body would be made up of multiple segments that I could individually tweak. Also, for some of the designs, I'd like to have spiky protrusions coming out of the surface, but not all of them. The spikes should be able to vary in length, direction, and curvature.

Could you help me design a parametric OpenSCAD file that can generate these kinds of shapes? It should use the MCAD library.

[Assistant]
ProtoCambrianCom.scad:
```
Seed=1;//[0:0.001:1000]
part = 1; //[1,2,3,4,5,6]
show="naked";//[naked,spiky]
/* [Hidden] */
// global things
glx=rnd(1,3);
gly=4-glx;
ringseg = max(3, round(rnd(1,8))*2);//ring profile
moderator=0.2;
//late addition that gets passed thru all steps since a globalvaiable dont scale very well
//  controling spikes properties
spike1 = [abs(rnd(-5, 30-(ringseg/6))), 0, rnd(-0.5, 0.4), rnd(-0, 1.7)];
spike2 = [abs(rnd(-5, 30-(ringseg/6))), 0, rnd(-0.4, 0.5), rnd(-0, 1.7)];

grove = [rnd(0.5, 1.5), rnd(0.2, 0.3), rnd(0.1, 0.3)];
grove2 = [rnd(1, 1), rnd(0.2, 0.3), rnd(0.1, 0.3)];
r = 90;
r2 = 90;
r3 = 90;
l = rnd(50, 150);
l2 = rnd(50, 150);
lenseg = round(rnd(ringseg/4,ringseg/2));
echo (lenseg);

//here we make three packages of XYZs, Radus, 3 grove values and a list of XYZ points that make a profile
start = [
  [0, 0, 0], r, grove, xring(ringseg), rnd(2, 10)
];

end = [
  [sin(r) * l, 0, cos(r) * l], r2, grove2, xring(ringseg), rnd(10, l/3)
];
end2 = [end[0] + [sin(r2) * l2, 0, cos(r2) * l2], r2, grove, xring(ringseg), rnd(5, 10)];

// here we finally get go
union(){
seg(start, end, lenseg, spike1, 1, 0);
seg(end, end2, lenseg, spike2, 0, 1);
}

module seg(p1, p2, div, spike, cap1 = 1, cap2 = 1)
//segment constructor. These steps until quad are unnessearily complicated
//but it pretty much runs throu intermediates of p1 and p1 package and twostep calles for the construction of polygons connecting them  ringbridge via brige

{
  m1 = lerp(p1, p2, min(p1[2][2], 1 - p2[2][1]));
  m2 = lerp(p1, [p2[0], lerp(p1[1], p2[1], 0.5), p2[2], p2[3], p2[4]], max(1 - p2[2][1], p1[2][2]));

  if (cap1 == 1) cap(p1[2][0], p1, 1);
  bridge(p1[2][0], p1, m1, 1, spike);
  for ( in = [0: 1 / div: 1 - (1 / div)]) {
     bridge(1, lerp(m1, m2, SC3(in) ), lerp(m1, m2, SC3(in +(1 / div))), 1, spike);

  }

  bridge(1, m2, p2, p2[2][0], spike);
  if (cap2 == 1) cap(p2[2][0], p2, 0);

}

//endcaps
module cap(s1, ip1, reverse) {
  r1 = ringtrans(ringscale(ringrot(ip1[3], ip1[1]), s1 * ip1[4]), ip1[0]);
  c1 = avrg(r1);
  ring1 = concat(r1);
  last1 = len(ring1);
  color(rndc()) for (i = [0: last1 - 1]) {

    if (reverse == 1) polyhedron([ring1[i], ring1[(i + 1) % last1], c1], [
      [1, 0, 2]
    ]);
    else polyhedron([ring1[i], ring1[(i + 1) % last1], c1], [
      [0, 1, 2]
    ]);
  }
}
module bridge(s1, ip1, ip2, s2, spike) {
  r1 = ringtrans(ringscale(ringrot(ip1[3], ip1[1]), s1 * ip1[4]), ip1[0]);
  r2 = ringtrans(ringscale(ringrot(ip2[3], ip2[1]), s2 * ip2[4]), ip2[0]);
  c1 = avrg(r1);
  c2 = avrg(r2);
  ring1 = concat(r1);
  ring2 = concat(r2);
  last1 = len(ring1);
  last2 = len(ring2);

 ringbridge(ring1, ring2, spike);

}

module ringbridge(r1, r2, spike) {
// ok were ready to show what we got
  n = len(r1);
  cbr = concat(r1, r2);
// so we made a lumpy sausage, What if we reused that spaceship code to make it more agressive, quad replaces polyhedron but does alot more than a sqare. now skip to quad

if(show=="spiky")
{
 for (i = [0: n - 1]) {
    quad(      [cbr[n + i], cbr[n + (i + 1) % n], cbr[(i + 1) % n], cbr[i]], spike    );
  }

}
else{

   l=[for(i=[0:n])[i, (i+1)%n,n+(i+1)%n,n+i]];
   polyhedron(     concat(r1,r2),l);
}
};

module point(p1, p2, div) {

  translate(p1[0]) sphere(2);
}

module line(p1, p2, div) {
  hull() {
    translate(p1[0]) sphere(1);
    translate(p2[0]) sphere(1);
  }
}

//**********************************************************************
//**********************************************************************
//**********************************************************************
// base colors fo quad module , this should not be here
C0 = (un(rndc()) + [2, 0, 0]);
C1 = (un(rndc()) + [2, 2, 0]);
C2 = (un(rndc()) + [0, 2, 2]);
// quad  is the magic part, ring in this context is just four points the intended extention to polygon  never took place.
// modifyer is what previous passed as spike
// so this is a common  recursive non branching  extrusion .
module quad(ring, modifyer, i = 0) {
  c = avrg(ring); // center point list of XYZs
  n = un(p2n(ring[0], ring[1], ring[3]) + p2n(ring[3], ring[1], ring[2]));//unit normal of square is the avarege of its triangle. and base for extrude direction

  area = (polyarea(ring[0], ring[1], ring[3]) + polyarea(ring[3], ring[1], ring[2]));// finding combined area with herons formula
  ex = modifyer[0];   // extrude height
  sc = 0.7 * (3 - i) / (4 - ex / area);// extrude downscale
  sn = ([modifyer[1], modifyer[2]]); // things about the bending of spikes
  ns = sn[0] * n * ex;
  ew = sn[1] * n * ex;
  nsc = sn[0];
  ewc = sn[1];
  // echo(area);
// i guess modifyer modify it self here
  nextmodifyer = [modifyer[0] * modifyer[3], modifyer[1], modifyer[2], modifyer[3]];
// now the recusion if area is big enought and iterations is small and ex i significant for the area.
  if (i < 4 && area > 100 && abs(ex) > sqrt(area) * 0.1) {
// these are the new point of the extruded quad
    ep0 = lerp(c + n * ex, ((ring[0] + n * ex) + ns - ew), sc - ewc * 0.2 + nsc * 0.2);
    ep1 = lerp(c + n * ex, ((ring[1] + n * ex) - ns - ew), sc - ewc * 0.2 - nsc * 0.2);
    ep2 = lerp(c + n * ex, ((ring[2] + n * ex) - ns + ew), sc + ewc * 0.2 - nsc * 0.2);
    ep3 = lerp(c + n * ex, ((ring[3] + n * ex) + ns + ew), sc + ewc * 0.2 + nsc * 0.2);

    //    echo(ep0,ep1,ep2,ep3);
//And the color stuff. color and normals make best friends for pretty fake light
    color(un((C0 * abs(n[0]) + C1 * abs(n[1]) + C2 * abs(n[2]) + [1, 1, 1] * abs(n[2])) / 4)) {
//extrusion sided
//Yes right this is recyled code so instead of making sides by polyhedra we just lazy call quad with i=100 to halt recursion and making do it for us huh.
      quad([ring[0], ring[1], ep1, ep0], modifyer, 100);
      quad([ring[1], ring[2], ep2, ep1], modifyer, 100);
      quad([ring[2], ring[3], ep3, ep2], modifyer, 100);
      quad([ring[3], ring[0], ep0, ep3], modifyer, 100);
    }
    quad([ep0, ep1, ep2, ep3], nextmodifyer, i + 1); // this one contious the spike forward
    //if (i==0){       polyhedron([ring[0],ring[1],ring[2],ring[3],c],[[0,1,3],[1,2,3]]);}
  } else if (i == 100 || abs(ex) < sqrt(area) * 0.1)
// cach the spacial case of 100 and do normal polyhedron
{
    color(un((C0 * abs(n[0]) + C1 * abs(n[1]) + C2 * abs(n[2]) + [1, 1, 1] * abs(n[2])) / 4)) polyhedron([ring[0], ring[1], ring[2], ring[3], c + (n * ex / 10)], [
      [1, 0, 4],
      [2, 1, 4],
      [3, 2, 4],
      [0, 3, 4]
    ]);
  } else {
// dont remember what this was a fix for or if

    color(un((C0 * abs(n[0]) + C1 * abs(n[1]) + C2 * abs(n[2]) + [1, 1, 1] * abs(n[2])) / 4))
      //ERROR: Unable to convert point at index 0 to a vec3 of numbers WARNING: PolySet has degenerate polygons
    if (avrg(ring, len(ring)) != undef) {
      polyhedron([ring[0], ring[1], ring[2], ring[3], c + (n * ex)], [
        [1, 0, 4],
        [2, 1, 4],
        [3, 2, 4],
        [0, 3, 4]
      ]);
    }

  }

}
// thats it
//**********************************************************************

// ring operators transform ring profiles never mind
function ringrot(r = [ [0, 0, 0]
], v) = [ for (i = [0: len(r) - 1]) let (inx = r[i][0], iny = r[i][1], inz = r[i][2])[
  inx * sin(v) - inz * cos(v),  iny,  inx * cos(v) + inz * sin(v) ]];
function ringscale(v, scale) = [ for (i = [0: len(v) - 1])
  [   v[i][0] * scale,   v[i][1] * scale,   v[i][2] * scale  ]];
function ringtrans(v, t) = [ for (i = [0: len(v) - 1])  [   v[i][0] + t[0],   v[i][1] + t[1],   v[i][2] + t[2]  ]];
// more ring function concernigng generation skip this
function xring(x = 8, i = 0.5) = mirring([  for (i = [(360 / x) * 0.5: 360 / x: 359])[0, sin(i)*glx, cos(i)*gly] + rndV2(2/x+0.2)]);
function basering(x = 8) = mirring([  for (i = [(360 / x): 360 / x: 359])[0, sin(i), cos(i)] + rndV2(3)]);
function mirring(ring) =let (n = floor((len(ring) - 1) / 2))
concat(  [    for (i = [0: n]) ring[i]  ], [    for (i = [0: n])[ring[n - i][0], -ring[n - i][1], ring[n - i][2]]  ]);
function rndV2(t = 1) = [rands(-t, t, 1)[0], rands(-t, t, 1)[0], rands(-t, t, 1)[0]];

//**********************************************************************
//**********************************************************************
// helper functions

function avrg(v) = sumv(v, len(v) - 1) / len(v);
// averages any regular list of anything numeric

function sumv(v, i, s = 0) = (i == s ? v[i] : v[i] + sumv(v, i - 1, s));
// sums any regular list of anything numeric

function lerp(start, end, bias) = (end * bias + start * (1 - bias));
//lerp linear interpolation between two values

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]]);
//polygon to normal vector

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));
//lengh of 2 or 3d vector

function un(v) = v / max(len3(v), 0.000001) * 1;
//unit normal

function polyarea(p1, p2, p3) = heron(len3(p1 - p2), len3(p2 - p3), len3(p2 - p1));
// what i says

function rnd(a = 0, b = 1) = (rands(min(a, b), max(a, b), 1)[0]);
//random number

function rndc() = [rands(0, 1, 1)[0], rands(0, 1, 1)[0], rands(0, 1, 1)[0]];
//random color triplet or other use 0 to 1 triplet

function v3rnd(c) = [rands(-1, 1, 1)[0] * c, rands(-1, 1, 1)[0] * c, rands(-1, 1, 1)[0]] * c;
//general use -1 to 1 triplet

function heron(a, b, c) =
let (s = (a + b + c) / 2) sqrt(abs(s * (s - a) * (s - b) * (s - c)));
// Heron of Alexandria was a Greek mathematician, Heron's formula gives the area of a triangle by nothing but lengths of its sides

function SC3 (a)= let( b=clamp(a))(b * b * (3 - 2 * b));// smoothcurve and its two friends
function clamp (a,b=0,c=10)=min(max(a,b),c);
function gauss(x)=x+(x-SC3(x));
```


[User]
Hey, I'm looking to make a customizable fidget toy thing, and I've got some ideas. It's basically a series of nested rings, kind of like a gyro or a charro button as someone called it.

The core idea is that I want to be able to control the number of rings, the width of each ring, the minimum radius of the innermost ring, and the spacing between rings. Also, the overall height of the design is important, as it connects the rings, and I'd need to be able to set the resolution for the roundness of the shapes. I also want to add a little keyring loop at the outside.

So, let's break it down:

*   **Rings:**  I need a variable to set how many rings there are.
*   **Ring Width:** The rings should all be the same width, and this value will be multiplied by the nozzle size, but I just want to provide the multiple.
*   **Min Radius:** There's a minimum radius for the innermost ring, so I need a variable for that.
*   **Separation:**  There should be a variable to control the spacing between the rings.
*   **Resolution:** Need a variable to set the fineness of the circles/spheres for the rings.
*   **Height:** The height will be calculated based on the Min Radius, such that there is a center "shaft" for all rings. It must be calculated to hold all the rings together and must force the hole of the inner ring.
*   **Keyring Loop:** I need to be able to add a keyring loop, with the option to specify its outer radius, inner radius, and height. This keyring should be integrated with the outer ring and be outside of the main structure
*   **Sanity Checks:** I'd like some warnings if the design becomes unstable (e.g., if it becomes too tall, or separation is greater than half of the ring width).

The overall shape should use `sphere` and `cylinder` primitives, combining them using `difference` and `intersection` operations.

I think that's about it.  Can you generate an OpenSCAD file for me? I would like to use parametric values that can be edited with the customizer.

[Assistant]
Gyro.scad:
```
// Boton charro by Magonegro JUL-2016
// Number of rings:
Rings=5;
// Ring width multiple of the nozzle size (mm):
RingWidth=2.4;
// Min Radius (mm):
MINRadius=10;
// Separation between rings (mm typ 0.8):
Separation=0.8;
// Resolution (min.100 facets):
Facets=100;

/* [Hidden] */
// Hidden settings for normal users.
// Height should be calculated so that rings can be holded together.
Height=(MINRadius*2)-RingWidth; // Forces the hole of the inner ring
MaxRadius=MINRadius+(Rings*RingWidth)+(Rings*Separation);
// These are the keyring dimensions, increase it for a larger one (mm) Values choosen for a standard keyring.
KEYRINGRADIUSOuter=6;
KEYRINGRADIUSInner=3;
KEYRINHeightt=4;

module Ring(Radius,Width)
{
difference()
    {
    sphere(r=Radius+Width,center=true,$fn=Facets);
    sphere(r=Radius,center=true,$fn=Facets);
    }
}

module KeyRing()
{
// Ring designed this way for an easy print, not nice but functional.
difference()
    {
    translate([MaxRadius-1,0,-Height/2])
    difference()
        {
        cylinder(r=KEYRINGRADIUSOuter,h=KEYRINHeightt,$fn=Facets);
        cylinder(r=KEYRINGRADIUSInner,h=KEYRINHeightt,$fn=Facets);

        }
    sphere(r=MaxRadius-RingWidth,center=true,$fn=Facets);
    }
}

// Main
intersection()
{
    union()
    {
        for(i=[0:Rings-1])
        {
            Ring(MINRadius+(i*RingWidth)+(i*Separation),RingWidth);
        }
        KeyRing();
    }
        cylinder(r=MaxRadius*2,h=Height,$fn=Facets,center=true);
}

// Sanity checks
if(MaxRadius>Height*1.6)
{
    echo("<B>Error: Unstable build. Reduce ring number or increase Min radius</B>");
}
if(Separation>RingWidth/2.6)
{
    echo("<B>Too high separation or too low ringwidth</B>");
}

```


[User]
Okay, I'm trying to design a modular wire loom, and I've got some existing code for the bottom part, but it's really rough. It scales poorly, and the holes for screws are way off when you change the overall size. I'd like you to help me build a fully parametric version from scratch, that has separate files for the top and the bottom and that is much cleaner and easier to work with.

Here’s what I’m thinking:

**Overall Design:**

*   The loom is a two-part design: a bottom tray and a top cover.
*   The bottom tray has a main rectangular channel for wires, should have side walls and a "shoulder" that the top can attach to.
*   The sides of the bottom tray should have repeating saw-tooth cutouts for easy wire insertion, on opposite sides.
*   The bottom tray should have holes for mounting screws, positioned along the centerline of the base and sized appropriately for a given screw diameter.

**Parameters (that I want to control via a customizer):**

*   **`length`:** Overall length of the loom in mm.
*   **`width`:**  Overall width of the loom in mm. This will also essentially control the height of the side walls
*  **`wall_thickness`:** The thickness of the walls.
*   **`shoulder_height`:** How high the "shoulder" sits, the part the top will connect to.
*  **`shoulder_width`:** Width of the "shoulder" that the top will rest on
*   **`sawtooth_width`:** Width of the saw tooth cutouts.
*   **`sawtooth_spacing`:** Spacing between the saw tooth cutouts.
*   **`screw_hole_diameter`**: Diameter of the holes for the screws.
*   **`screw_hole_spacing`:** Spacing between the screw holes.
*   **`screw_hole_offset`**: offset from each edge of the base.

**Specific Issues with my Existing Code:**

*   The screw hole sizes don't scale correctly. They get smaller as the design gets bigger, which is backwards.
*   The side cutouts also get smaller and don't really scale right.
*   It's just generally messy and hard to follow the math and transformations.

**Desired Outcome:**

I’d like to end up with two .scad files:
* `wire_tray_bottom.scad`: containing the bottom part with all the parametric features described above.
* `wire_tray_top.scad`: containing the top part, also with parameters and designed to fit snuggly with the bottom part.

I think I'll need to use the `hull` or `minkowski` functions to build the shoulder and some of the other shapes. So it would be great if you could generate all the code for both parts. Could you also make the code parametric and scalable using OpenSCAD's customizer, and document everything clearly with comments?

[Assistant]
wire_tray_SQ_bottom.scad:
```
//WIRE LOOM SQUARE by Spicer
//Customizer version
//Default length is 120mm about 4 3/4 inches half of what was set to print on my 2016 Creator Pro diagonally
//Default width/height is very small at 4mm two sided box
//but that is why the options to scale the length, width, and height.
/* [Global] */
/*Customizer variables begin */

/* [LENGTH IN MM ]  "(size approximate)" */
// 180mm default length increased to a max of 480mm (how are ever going to print that?
 length = 1;//[1:120mm,1.5:180mm,2:240mm,3:360mm,4:480mm]
/* [WIDTH / HEIGHT IN MM]   "(size approximate)" */
 width = 2;//[1:≈4mm,2:≈8mm,3:≈12mm,4:≈16mm]

// Customizer variables end
 height = width;
 hol = (width + length / 2);

 M = [ [ length, 0, 0, 0 ],
       [ 0, width, 0, 0 ],
       [ 0, 0, height, 0 ],
       [ 0, 0, 0, 1 ] ] ;

 multmatrix(M) {
difference() {
{	//create box and make it hollow
difference() {
union () {  //add the shoulder to main box
	cube ([120, 4.75, 4.75]);  // main box
	translate ([0, -0.125, 3.75+0.35/height])
	minkowski() {cube ([120, 5, 0.35/height]); rotate ([0, 90, 0]) cylinder($fn=6, r=0.4, h=1); } // top lip shoulder
	}
translate ([-0.5, 0.625, 0.625])
	cube ([122, 3.5, 5.5]);

//saw tooth the sides to allow wire insert
for(sr = [2:6:120])  //slot right
translate ([sr, -0.75, 1]) cube ([1.5, 2, 4.5]);

for(sl = [2:6:120])  //slot left
translate ([sl, 3.25, 1]) cube ([1.5, 2, 4.5]);
}
//place holes in bottom for screws

for(cr = [1.75:4:120])  //circle
translate([cr,2.25,-1])  cylinder($fn = 15, h=3, r1=0.625/hol, r2=1.25/hol);
}
}

}
```


[User]
Hey, I'm trying to design a wire loom, specifically the top part, and I'm having some trouble with the way scaling affects the thickness. I've got the basics down in my existing code, but it gets a little wonky with the top cap section when I start changing the size. I was hoping you could help me build a parametric version of this.

Basically, it's a long, boxy shape with a kind of "shoulder" or lip that fits inside the lower part of the loom. Think of it like a rectangular box with a slightly smaller lip that runs along the top.

Here's what I need, broken down a bit:

*   **Overall Shape:** A rectangular box.
*   **Lid Lip:** A lip around the perimeter of the top that is slightly smaller and will fit into a corresponding lower box section. This lip is basically a little ledge that runs along all sides.
*   **Parameters:**
    *   `length`: The overall length of the wire loom top (in mm).
    *   `width`: The overall width of the wire loom top (in mm).
    *   `height`: The overall height of the wire loom top (in mm). It can be the same as the width if that's convenient.
    *   `lip_height`: The height of the "shoulder" or lip (in mm).
    *   `lip_inset`: How much smaller the lip is compared to the overall size (in mm). In my current file this is expressed as the height. It may be easier to do all sizing relative to width and length.
    *   `lip_thickness`: The thickness of the lip itself (in mm).
*   **Scaling Issues:** The big problem I'm running into is that when I scale things up using a matrix, the top cap ends up being way too thick. I need the *relative* thickness to stay consistent, but I'm having trouble keeping it in check. The way the top is cut out of a solid cube and the minkowski difference makes it hard to keep a consistent relationship when resizing.

I would like it to be set up so I can adjust all the parameters. Could you generate an OpenSCAD file (or files if necessary) that handles all of this? I don't really have any strong opinions on libraries, but if there's one that makes this easier, go for it. Thanks!

[Assistant]
wire_tray_SQ_top.scad:
```
//WIRE LOOM SQUARE by Spicer
//Customizer version
//Default length is 120mm about 4 3/4 inches half of what was set to print on my 2016 Creator Pro diagonally
//Default width/height is very small at 5mm lid to fit the matching box.
//but that is why the options to scale the length, width, and height.
/* [Global] */
/*Customizer variables begin */

/* [LENGTH IN MM ]  "(size approximate)" */
// 180mm default length increased to a max of 480mm (how are ever going to print that?
 length = 1;//[1:120mm,1.5:180mm,2:240mm,3:360mm,4:480mm]
/* [WIDTH and HEIGHT IN MM]   "(size approximate)" */
 width = 2;//[1:≈4mm,2:≈8mm,3:≈12mm,4:≈16mm]

// Customizer variables end

height = width;
 M = [ [ length, 0, 0, 0 ],
       [ 0, width, 0, 0 ],
       [ 0, 0, height, 0 ],
       [ 0, 0, 0, 1 ] ] ;
 multmatrix(M) {
translate ([0, 5.65, 5.65])  rotate ([180, 0, 0]) {  //flip and adjust
difference() {
	translate ([0.1,-1.125, 2.65]) cube ([119.8, 6.75, 2.9-height/6]);  //cap start to subtract bottom from, the rest is cut away
union () {  //add the shoulder to main box
	cube ([120, 4.5, 4.5]);  // main box
	translate ([-0.1, -0.25, 3.5+0.15/height])
	minkowski() {cube ([120, 5.03, 0.38/height]);
		rotate ([0, 90, 0]) cylinder($fn=6, r=0.4, h=1); } // top lip shoulder
		}
translate ([-0.5, 0.5, 0.5])
	cube ([122, 3.5, 4]);
}
}
}
```


[User]
Hi, I'm looking to generate some custom tool holders for my MPCNC. I need a way to create holders for a tool that has varying diameters along its length. I'd like to parameterize the tool holder so I can make multiple holders for the same tool, each conforming to a different diameter of the tool. I want to make these files using OpenSCAD and use it to generate STL files that I can print.

Here's what I need:

*   **Tool Diameter (td):** This will be the main parameter, specifying the diameter of the tool at the location where the holder will grip it. This value will change each time I export a holder STL.
*   **Tool Offset (to):** This determines the distance from the center of the tool to the side of the mount where it attaches to the MPCNC. This value needs to be automatically adjusted to avoid overlap of the tool and mount. I'll manually specify a minimum value (`to_proposed`) but the design should ensure that the effective offset (`to`) will be at least `td/2 + th` (where `th` is explained next). The effective offset needs to be printed to the console (like an `echo` in OpenSCAD). Crucially, I will need to keep the same value of *to* for all holders of the same tool.
*   **Thickness (th):** The thickness of the plastic ring that holds the tool.
*   **Height (ht):** The height of the tool holder.
*   **Gap (gap):** A gap between the two sides of the tool holder that allow tightening.
*   **Hole Diameter (hd):** The diameter of the mounting holes.
*   **Tool Coverage (tool_coverage):**  A value between 0 and 1 specifying how much of the tool's circumference is covered by the holder. This affects the size of the holding arc.

The design should include:

*   A ring that holds the tool using an arc, with an adjustable coverage using `tool_coverage`. The ring should have a tightening mechanism using a gap controlled by `gap` and a place for screws on either side.
*   Two "ears" for bolting the holder to the Z carriage of the MPCNC.
*   The mounting screws need to be moved higher if the tool ring gets too large so that the mount remains printable.
*   There should be cutouts for the tool itself, for tightening, and for the bolt.
*   I'd like to avoid the need for nut traps on the clamps for now.

I'd like the design to be modular. It should include functions for:
* `square2` with `size`, `aligns`, and `radius`
* `arc` with `r`, `a1`, `a2`, and `ir`.
* `tool` function to display a tool with a given variable diameter for testing purposes.
* `bimirror` for quick mirroring along axis.

The basic workflow I'm envisioning is that I will:

1.  Set the `td` value to the largest diameter for the specific tool.
2.  Run the script and examine the `echo` output to determine the minimum `to` value needed. Update the `to_proposed` value in the script based on the `echo` value or a value higher than that to improve ease of access.
3.  Check the model visually to ensure that the screws are accessible (there is a logic that moves the screws up, but I want to verify) and that the tool holder fits into the Z carriage well.
4.  If I am happy, I'll export to STL.
5.  Change `td` to the next largest tool diameter.
6.  Repeat steps 2-5, keeping the same `to_proposed` value for all holders of the same tool.

Could you please create the OpenSCAD file(s) for this? I don't need any specific libraries like MCAD. I don't want to generate code to handle the varying tool shape, just the holders.

[Assistant]
customizable_mount.scad:
```

// Instructions:
// 1. put the tool's biggest diameter into td
// 2. hit F5 and observe the "effective tool offset" -- all holders for the same tool must use the same tool offset, but this value will be auto-bumped up of the size of the tool necessitates it. put the shown value (or larger) into "to_proposed" and re-build (F5)
// 3. if you're happy with the first holder, F6 and save
// 4. put the tool's next biggest diameter into td, F5 to check, F6+save to get STL
// 5. repeat step 4 for all holders you need for your given tool
//
// refinements:
// - if you need more rigidity between the tool ring and mount, adjust tool_coverage
// - if you need more play in tightening, adjust gap
// - if you want a thicker or taller ring, adjust th and ht

th=5; // thickness of the holding plastic (mm)
ht=15; // height (mm)
td=44.9; // tool diameter (mm)
to_proposed=36; // tool offset: how far is the center of the tool from the side of the mount (mm)
gap=2; // gap for tightening (mm)
hd=4; // hole dia (mm)
tool_coverage=0.35; // value between 0 and 1 -- how much is the tool ring connected to the mount side?

$fn=32;

// both mirror and not-mirror by the given axis (for concise symmetry)
module bimirror(mr) {
    for (m = [[0,0,0],mr]) mirror(m) children();
}

module arc(r,a1,a2,ir=0) {
    // normalize to 0..360 (even for negatives)
    a1n = (a1 % 360 + 360) % 360;
    a2n = (a2 % 360 + 360) % 360;
    difference() {
        circle(r);
        if (ir != 0) circle(ir); // if inner radius given, subtract it away

        // get the a1 to interpolate to, adding a revolution if going the long way
        a1next = a2n>a1n ? a1n + 360 : a1n;

        polygon([
            [0,0],
            [cos(1.00*a2n + 0.00*a1next)*2*r,sin(1.00*a2n + 0.00*a1next)*2*r],
            [cos(0.66*a2n + 0.33*a1next)*2*r,sin(0.66*a2n + 0.33*a1next)*2*r],
            [cos(0.33*a2n + 0.66*a1next)*2*r,sin(0.33*a2n + 0.66*a1next)*2*r],
            [cos(0.00*a2n + 1.00*a1next)*2*r,sin(0.00*a2n + 1.00*a1next)*2*r],
        ]);
    }
}

module tool() {
    translate([0,0, 0]) cylinder(d=44.9,h=7);
    translate([0,0, 7]) cylinder(d=40.8,h=2);
    translate([0,0, 9]) cylinder(d=44.9,h=10);
    translate([0,0,19]) cylinder(d=44.9,d2=75,h=10);
    translate([0,0,29]) cylinder(d=75,h=17.7);
    translate([0,0,46.7]) cylinder(d=75,d2=67.4,h=7);
    translate([0,0,53.7]) cylinder(d=67.4,h=80);
}

//%tool();

module square2(size,aligns="LL",radius=0) {
    real_size = len(size) ? size : [size,size];
    tr = [
        aligns[0]=="C" ? 0 : aligns[0]=="R" ? (-real_size[0]/2) : (+real_size[0]/2),
        aligns[1]=="C" ? 0 : aligns[1]=="R" ? (-real_size[1]/2) : (+real_size[1]/2),
    ];
    translate(tr) {
        if (radius>0) {
            inner_size = [for (v=real_size) v-min(radius*2,v)];
            offset(r=radius) square(inner_size, center=true);
        } else {
            square(size,center=true);
        }
    }
}

module tool_holder_profile() {
    translate([-37/2,0]) difference() {
        polygon([
            [0,0],
            [-7.727,2.071],
            [-7.727+-5.780,2.071+5.765],
            [37+7.727+5.5780,2.071+5.765],
            [37+7.727,2.071],
            [37,0]
        ]);

        translate([37/2,-35.25+5.244]) circle(d=70.5, $fn=$fn*4);
    }
}

to = max(to_proposed,td/2+th);
echo("effective tool offset =",to);

offset_hole = td>45;

mount_hole_z = offset_hole ? ht*1.5 : ht*0.5;
real_ht = offset_hole ? ht*2 : ht;

difference(convexity=50) {
    linear_extrude(real_ht,convexity=50) {
        // mount interface side, 2d
        difference() {
            union() {
                // wings where the we bolt it to the mount
                bimirror([1,0]) translate([-37/2,0]) rotate(90+90-15) square2([8*2,th],aligns="CL");

                // round part that goes flush against the body of the mount
                translate([0,-35.25+5.244]) arc(r=35.25,a1=-63.304/2+90,a2=63.304/2+90,$fn=4*$fn);
            }
            // chop off southern bits (body of the arc)
            translate([0,-th]) square2([80,40],aligns="CR");
        }

        // tool grabber side, 2d
        difference() {
            union() {
                hull() {
                    // circle of the tool holder
                    //translate([0,-to]) offset(th) circle(d=td);
                    translate([0,-to]) arc(r=th+td/2,a1=90-180*tool_coverage,a2=90+180*tool_coverage,ir=td/2);

                    // hull target to join it with the mount interface side
                    square2([37,th],aligns="CR");

                }
                translate([0,-to]) offset(th) circle(d=td);
                // tightening wings
                bimirror([1,0,0]) translate([gap/2,-to-td/2]) square2([th,th+2*hd],aligns="LR");
            }
            // tool cut-out
            translate([0,-to]) circle(d=td,$fn=2*$fn);

            // gap for tightening
            translate([0,-to-td/2+1]) square2([gap,th+5],aligns="CR");
        }
    }

    // mount tightening screw
    bimirror([1,0]) translate([-37/2-4,0,mount_hole_z]) rotate([0,90,90-15]) cylinder(d=hd,h=th*2+1,center=true);

    // tool tightening screw
    translate([0,-to-td/2-th-hd,ht/2]) rotate([0,90]) cylinder(d=hd,h=gap+th*2+1,center=true);

    if (offset_hole) {
        bimirror([1,0]) {
            translate([37/2,-th,ht]) cube2([50,td+th*2+20,ht+1],aligns="LRL");
            translate([-37/2,0]) rotate(90+90-15) translate([0,th,ht]) cube2([8+th+5,th*5,ht+1],aligns="LL");
        }
        translate([0,-to,ht]) cube2([td+2*th+1,td,ht+1],aligns="CRL");
    }

}

// fake tool
//%translate([0,-to]) color([0,1,1,0.1]) cylinder(d=td,h=30);
```


[User]
I'd like to create a customizable magnetic bar, primarily for knives but potentially for other tools. I need an OpenSCAD design that lets me control quite a few aspects.

Firstly, the overall dimensions should be adjustable: I need to set the *length* and *width* of the bar. The bar itself should have rounded corners, and the *corner radius* should also be a parameter I can modify.

The design will hold magnets in a row. I need to specify the *magnet diameter* and *magnet height*. The distance between each magnet should also be adjustable via an *offset* parameter. The number of magnets should be calculated automatically based on the overall length, the magnet diameter, and the offset, keeping the magnets centered along the bar's length.

Finally, I want the *option* to include screw mounts. If I choose to include these, there should be two screw holes, one on each end of the bar. I will also need to set the *screw diameter* and *screw head diameter* . It would also be good if there is a small, very thin layer in the screw hole to improve printability for this feature.

The bar should be a solid object, with the magnets inset.

Can you provide an OpenSCAD file (or files) that accomplishes this, ensuring that it's fully parametric? I don't need any external libraries. I want to specify all the dimensions myself in the top level of the file.

[Assistant]
magnetic_knife_bar.scad:
```
/////////////////////////////////////////////////////////////////////
//
// File: magnetic_knife_bar.scad
// Author: Stephan Mueller
// Date: 2016-07-16
// Description: Customizable magnetic knife bar
//
/////////////////////////////////////////////////////////////////////

// Customizer Settings: //

/* [Options] */

//length of the knife bar
length = 160; // [50:1:500]

//width of the knife bar
width = 25; // [10:1:100]

//diameter of the magnet + offset
magnet_diameter = 10.4; // [5:0.1:20]

//height of the magnet + offset
magnet_height = 5.2; // [2:0.1:20]

//offset between magnets
offset = 5; // [1:0.1:50]

//corner radius
corner_radius = 5; // [0:1:50]

//create screw mounts
screw_mounts = "no"; // [yes, no]

//screw diameter
screw_diameter = 3.2; // [1:0.1:10]

//screw head diameter
screw_head_diameter = 6; // [1:0.2:20]

// Static Settings: //

/* [Hidden] */

wall = magnet_height + 1;
$fn = 100;

number_of_magnets = floor((length-((screw_mounts=="yes" ? 2 : 0)*(screw_head_diameter+1))) / (magnet_diameter+offset));
first_offset = (length - (number_of_magnets*(magnet_diameter+offset)) + offset) / 2;

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

module magnetic_knife_bar(){
    difference(){
        roundCube(length, width, wall, corner_radius);
        for (i = [0:1:(number_of_magnets-1)]){
            translate([first_offset + magnet_diameter/2 + i*magnet_diameter + i*offset, width/2, (wall - magnet_height)]) cylinder(h=magnet_height + 0.1, r=magnet_diameter/2);
        }
        if (screw_mounts=="yes"){
            translate([screw_head_diameter/2 + 1, width/2, wall-1.9]) cylinder(2, r=screw_diameter/2);
            translate([screw_head_diameter/2 + 1, width/2, -0.1]) cylinder(wall - 1.9, r=screw_head_diameter/2);
            translate([length - screw_head_diameter/2 - 1, width/2, wall-1.9]) cylinder(2, r=screw_diameter/2);
            translate([length - screw_head_diameter/2 - 1, width/2, -0.1]) cylinder(wall - 1.9, r=screw_head_diameter/2);
        }
    }

}

module roundCube(x, y, z, r = 1){
    r = max(0.01, r);
    hull(){
        translate([r, r, 0]) cylinder(r=r, h=z);
        translate([r, y-r, 0]) cylinder(r=r, h=z);
        translate([x-r, r, 0]) cylinder(r=r, h=z);
        translate([x-r, y-r, 0]) cylinder(r=r, h=z);
    }
}

magnetic_knife_bar();
```


[User]
Hi, I'm working on a vortex separator for my vacuum cleaner and need some help designing the inlet pipe fitting. I have a basic concept in mind, but I need to make it parametric so I can adjust it to fit different sizes of pipes and buckets.

Essentially, I need a pipe that enters a cylindrical chamber tangentially. The current design uses a fixed diameter pipe, a fixed flange, and fixed placement, but what I really want is for the pipe and chamber to be resizable and parametric. Also, I'd like for the flange to also be parametric and adjustable.

Here's a breakdown of the requirements:

1.  **Pipe Fitting:** This is the main part, a cylinder that forms the inlet pipe.
    *   It should be able to adjust the **outer diameter** and **wall thickness** of the pipe.
    *   The pipe needs to be a specific **length**.
    *   The pipe should enter the chamber **tangentially**. I need to be able to control how far from the chamber it starts (tangent offset, I think) and also the height at which it enters relative to the bottom of the chamber.
2.  **Mounting Flange:** This is the part that attaches to the side of the chamber and supports the pipe.
    *   The flange needs to be a rectangular shape with rounded corners and needs to be placed onto the pipe.
    *   The **size of the rectangle** of the flange must be adjustable. The corners must have an adjustable rounding radius.
    *   It should have **screw holes** that are parametrically controlled. I want to specify the number of holes, and their diameter, as well as the distance from the edges of the flange.
3.  **Chamber (Bucket):** This represents the cylindrical bucket/chamber part of the vortex separator. It's mostly for context so I know where the pipe is going and serves as a negative space.
    *  I need to be able to control the **inner and outer diameter** of this cylinder, as well as the **height**.

I'd like this design to be done using OpenSCAD, and it'd be great if you could include comments in the code so that I can easily understand it. I'm hoping to be able to adjust all these parameters using a Customizer interface in OpenSCAD.

For libraries, I don't need anything fancy. Just the usual functions should be fine - I'm not aware of any special libraries that would be helpful here. I'm hoping to have all of the code (even the variables) in one .scad file, so I don't have to load a bunch of different modules. Thanks!

[Assistant]
Vortex-1.scad:
```
// Side-pipe fitting for vortex

rotate([90,0,0]) difference() {
  // cylinder that is the pipe fitting, inside the flexible pipe
  translate([100,-50,100]) rotate([90,0,0]) difference() {
    union() {
      cylinder(d=32,h=100) ;
      // fitting flange
      translate([15,-30,-15]) rotate([0,-35,0])
      difference() {
        cube([20,60,80]) ;
        // screw holes
        translate([0,10,10]) rotate([0,90,0]) cylinder(d=6,h=20) ;
        translate([0,50,10]) rotate([0,90,0]) cylinder(d=6,h=20) ;
        translate([0,10,70]) rotate([0,90,0]) cylinder(d=6,h=20) ;
        translate([0,50,70]) rotate([0,90,0]) cylinder(d=6,h=20) ;
      }
    }
    cylinder(d=29,h=100) ;
  }
  // Cylinder that represents the bucket - Used as negative
  cylinder(d1=240,d2=280,h=250) ;
}

```


[User]
I need a custom support block for my bed frame. It needs to be rectangular with rounded ends, and have a groove running along its length on the top. Think of it like a rectangular block with half-cylinders on the ends and a half-cylinder cut out on the top, except the whole thing is a single solid piece.

I need to be able to control the overall length, width, and height of the block, as well as the radius of the groove.  The rounded ends should be based on the same radius as the diameter of the groove.

I'm thinking a single OpenSCAD file would be best for this. I don't need any external libraries, as far as I know, just simple primitives should do it. I want to be able to set these values at the top of the file:

*   `box_Length`: The total length of the block (including rounded ends)
*   `box_Width`:  The width of the block
*   `box_Height`: The height of the block
*   `groove_Radius`:  The radius of the groove on top and the ends

Could you generate that for me?

[Assistant]
BedframeSupport.scad:
```
/*--------------------------------------------*/
/*  Castor Replacement Generator v1           */
/*  Created by Alex Keeling                   */
/*  thingiverse@keeling.me                    */
/*  License: Creative Commons - Public Domain */
/*  2016-7-17 First version on Thingiverse    */
/*--------------------------------------------*/

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

// How long should it be? (mm)
box_Length = 80; // [6:250]

// How wide should it be? (mm)
box_Width = 50; // [25:250]

// How tall should it be? (mm)
box_Height = 30; // [15:250]

//How deep should the groove be? (mm)
groove_Radius = 5; // [1:10]

/* [Hidden] */

grooveR = groove_Radius;
cylR = 5;
cylH = box_Height;
cylFN = 100;

boxW = box_Length - cylR * 2;
boxD = box_Width - cylR * 2;

difference(){
hull() {
translate([cylR, cylR, 0])
	cylinder(r=cylR, h=cylH, center=false, $fn=cylFN);

translate([cylR + boxD, cylR, 0])
	cylinder(r=cylR, h=cylH, center=false, $fn=cylFN);

translate([cylR, cylR + boxW, 0])
	cylinder(r=cylR, h=cylH, center=false, $fn=cylFN);

translate([cylR + boxD, cylR + boxW, 0])
	cylinder(r=cylR, h=cylH, center=false, $fn=cylFN);
}

translate([cylR + boxD / 2, -5, cylH])
	rotate([-90, 0, 0])
		cylinder(r=grooveR, h=boxW + cylR * 2 + 10, center=false, $fn=cylFN);
}

// Written by Alex Keeling 2016
```


[User]
Hey, I'm looking to design a customizable optical encoder using OpenSCAD. I need something that'll let me adjust the physical dimensions and shaft type, and also include options for a set screw. Here are the key parameters I'd like to be able to control:

**Encoder Wheel:**

*   **Outer Diameter:** I need to be able to set the outer diameter of the encoder wheel.
*   **Wheel Height:** The height of the encoder wheel itself.
*   **Slit Length:** The length of the slits cut into the encoder wheel.
*   **Slit Count:** The number of slits around the wheel.
*   **Slit Ratio:** The ratio between the slit opening and the solid part between slits.
*   **Rim Width:** The distance from the outer edge to the start of the slits.

**Hub:**

*   **Hub Diameter:** The diameter of the inner hub.
*  **Hub Height:**  The length that the hub extends from the wheel.

**Shaft:**

*   **Shaft Type:** I need to be able to choose between different shaft types, like a circular shaft, a D-shaped shaft, a double-D shaft, a square shaft, hex shaft and octagonal shaft.
*   **Shaft Diameter:** The diameter of the hole for the shaft.
*   **Shaft Through Encoder:** Option for the shaft to go all the way through the encoder or only partway.
*   **Shaft Flat Depth:** Depth of the flat section for D and double-D shafts.

**Set Screw:**

*   **Set Screw Hole:** Option to include a hole for a set screw.
*   **Set Screw Diameter:** The diameter of the set screw hole.
*   **Set Screw Nut:** Option to include a slot for a set screw nut.
*   **Set Screw Nut Diameter:** The diameter of the set screw nut slot.
*   **Set Screw Nut Thickness:**  The thickness of the set screw nut slot.

Could you generate an OpenSCAD file for this, including all the parameters as customizable variables at the start of the file? Also, could you make sure the design checks for things like the set screw nut having enough space and disables itself when it doesn't? I'd also like it to give a warning of some kind if the hub is too small. I don't need to interface with any external libraries.

[Assistant]
optical_encoder.scad:
```
//customizable optical encoder
// James Wickware - 7/18/2016

// preview[view:north east, tilt:top diagonal]

/* [Encoder] */
// the outer diameter of the optical encoder in millimeters.
outer_diameter = 30; //[0:150]

// the height of the encoder wheel in millimeters.
wheel_height = 2; //[0.1:0.1:20]

// the length of the slits in millimeters.
slit_length = 6; //[0:0.5:75]

// the number of slits in the encoder.
slit_count = 24; // [2:100]

// the ratio of the slit opening to the solid section between the slits. (0.5 is equal )
slit_ratio = 0.5; // [0.05:0.05:0.95]

// the distance between the outer diameter and the opening of the slits in millimeters.
rim_width =  1.75; // [0:0.25:25]

/* [Hub] */
// the diameter of the inner hub in millimeters.
hub_diameter = 12; // [0:0.25:25]

// the length that the hub shaft extends from the encoder wheel in millimeters.
hub_height = 4; // [0:0.5:50]

/* [Shaft] */
// the type of shaft 0 for circular shaft, 1 d shaft (circular with 1 flat, 2 double d shaft (circular with 2 flats), 3 for square shaft 4 for hex shaft, 5 for octagonal shaft.
shaft_type =2; //[0:Cylindrical Shaft, 1:D Type Shaft,2:Double D type Shaft,3:Square Shaft, 4:Hexagonal Shaft, 5:Octagonal Shaft]

// the diameter of the hole for the shaft in millimeters.
shaft_diameter = 4.5; //[0:0.1:20]

// Choose whether or not you want the shaft to go all the way through the encoder wheel.
shaft_goes_through_encoder =0 ; // [0:False,1:True]

// the depth of the flat from the outside edge of the shaft in millimeters (for d and double d shaft type only).
shaft_flat_depth = 1; // [0:0.1:10]

/* [Set Screw] */
// choose whether to include a hole for a set screw
set_screw = 1; // [0:False,1:True]

// the size of the set screw in millimeters
set_screw_diameter = 3; // [0:0.5:10]

// choose whether to include a slot for a set screw nut (automatically disabled when there is not enough room for it).
set_screw_nut = 1; // [0:False,1:True]

// the set screw nut diameter in millimeters. (for hex nuts, the distance from one corner to the opposite corner)
set_screw_nut_diameter = 5; // [1:0.25:14]

//  the set screw nut thickness in millimeters
set_screw_nut_thickness = 2; //[0.25:0.25:10]

/* [Hidden] */

// the outer radius
outer_radius = max(outer_diameter/2, hub_diameter/2);

// the hub radius.
hub_radius = hub_diameter/2;
shaft_radius = shaft_diameter/2;

// the depth of the hole for the shaft in millimeters.
shaft_depth = hub_height + (wheel_height*shaft_goes_through_encoder);

// calcuate whether or not the set screw and or nut can safely be included.
min_set_screw_nut_diameter = set_screw_diameter + 0.5;
max_set_screw_nut_diameter = (hub_diameter - shaft_diameter) * 0.6; // allow 60% of distance between shaft and hub
max_set_screw_nut_thickness = (hub_radius - shaft_radius) * 0.6; // allow 60% of distance between shaft and hub

can_have_screw =  (hub_height-0.99 > set_screw_diameter)  ? 1:0 ;

can_have_nut =  ((set_screw_diameter > 0) ? 1: 0)
                 * ((set_screw_diameter < set_screw_nut_diameter) ? 1:0)
                * ((set_screw_nut_thickness < max_set_screw_nut_thickness) ? 1:0)
                * set_screw_nut
                * can_have_screw;
echo(can_have_screw);
echo(can_have_nut);

set_screw_nut_offset = (((shaft_type == 0) ? 1:0) * .95)
                       +(((shaft_type == 1) ? 1:0) * .85)
                       +(((shaft_type == 2) ? 1:0) * .85)
                       +(((shaft_type == 3) ? 1:0) * .925)
                       +(((shaft_type == 4) ? 1:0) * .925)
                       +(((shaft_type == 5) ? 1:0) * .925)
                       +(((shaft_type == 6) ? 1:0) * .925)
                       +(((shaft_type == 7) ? 1:0) * .925)
                       +(((shaft_type == 8) ? 1:0) * .925)
                       ;

                       echo(set_screw_nut_offset);
// fudge factor to prevent coplanar boolean issues
fudge = 0.01;
difference(){
    union(){

        // Setup variables for wheel
        outer_rad = max((outer_radius - rim_width ) + fudge, hub_radius + fudge) ;
        inner_rad = max((outer_radius - rim_width - max(slit_length,0)) + fudge , hub_radius + fudge );
        step = 360/slit_count;
        half_step = step/2;
        qtr_step =  half_step / 2 ;

        echo("step");
        echo (step);
        ratio_angle = (slit_ratio-0.5) * half_step;
        // don't create slits if some touch-hard has made the hub too big
        if(outer_rad > inner_rad){
            // create the wheel
            difference(){
                cylinder(r = outer_diameter/2, h= wheel_height, $fn = slit_count * 2, center = true);

                if( slit_count%2 == 0){

                    // create slits
                    for (i = [0 :  step : 360 - fudge  ])
                    {
                        points = [
                        [ sin(i +ratio_angle)*outer_rad, cos(i+ratio_angle)*outer_rad , -wheel_height ],
                        [ sin(i +ratio_angle)*inner_rad, cos(i+ratio_angle)*inner_rad,  -wheel_height ],
                        [ sin(i+half_step - ratio_angle)*inner_rad , cos(i+half_step- ratio_angle)*inner_rad, -wheel_height ],
                        [ sin(i+half_step - ratio_angle)*outer_rad,  cos(i+half_step- ratio_angle)*outer_rad, -wheel_height ],
                        [ sin(i+ratio_angle)*outer_rad, cos(i+ratio_angle)*outer_rad,  wheel_height ],
                        [ sin(i+ratio_angle)*inner_rad, cos(i+ratio_angle)*inner_rad,  wheel_height ],
                        [ sin(i+half_step - ratio_angle)*inner_rad , cos(i+half_step- ratio_angle)*inner_rad,  wheel_height ],
                        [ sin(i+half_step - ratio_angle)*outer_rad,  cos(i+half_step- ratio_angle)*outer_rad,  wheel_height ]
                        ];

                        faces = [
                        [0,1,2,3],
                        [4,5,1,0],
                        [7,6,5,4],
                        [5,6,2,1],
                        [6,7,3,2],
                        [7,4,0,3]];

                        rotate(0,0,i)
                        polyhedron( points, faces ) ;
                    }
                }
                else{
                    for (i = [0 :  step : 360  - fudge])
                    {
                        points = [
                        [ sin(i-qtr_step)*outer_rad, cos(i-qtr_step)*outer_rad , -wheel_height ],
                        [ sin(i-qtr_step)*inner_rad, cos(i-qtr_step)*inner_rad,  -wheel_height ],
                        [ sin(i+qtr_step)*inner_rad , cos(i+qtr_step)*inner_rad, -wheel_height ],
                        [ sin(i+qtr_step)*outer_rad,  cos(i+qtr_step)*outer_rad, -wheel_height ],
                        [ sin(i-qtr_step)*outer_rad, cos(i-qtr_step)*outer_rad,  wheel_height ],
                        [ sin(i-qtr_step)*inner_rad, cos(i-qtr_step)*inner_rad,  wheel_height ],
                        [ sin(i+qtr_step)*inner_rad , cos(i+qtr_step)*inner_rad,  wheel_height ],
                        [ sin(i+qtr_step)*outer_rad,  cos(i+qtr_step)*outer_rad,  wheel_height ]
                        ];

                        faces = [
                        [0,1,2,3],
                        [4,5,1,0],
                        [7,6,5,4],
                        [5,6,2,1],
                        [6,7,3,2],
                        [7,4,0,3]];

                        rotate(0,0,i)
                        polyhedron( points, faces ) ;
                    }
                }

            }
        }

        // create hub
        if(hub_height > 0){
            if(set_screw == 1 && set_screw_diameter > 0 && can_have_screw == 1){
                difference(){
                  translate([0,0, ((hub_height/2) + (wheel_height /2))] )
                  cylinder(r= min(hub_diameter/2, (outer_diameter/2)-fudge ), h = hub_height +(fudge*2), $fn = slit_count *2, center = true);

                    // set screw hole
                    translate([0,0, ((hub_height/2) + (wheel_height/2 ))] )
                    rotate([-90,0,0])
                     cylinder(r=set_screw_diameter/2, h=hub_diameter, $fn=16);
                    if(can_have_nut == 1){
                    // set screw nut
                   translate([0,(hub_radius - ((hub_radius-shaft_radius)/2))*set_screw_nut_offset, ((hub_height/2) + (wheel_height/2 ))] )
                    rotate([90,00,00])
                    cylinder(r=max(min_set_screw_nut_diameter/2,set_screw_nut_diameter/2), h=max(set_screw_nut_thickness,0.25) +fudge, $fn=6, center = true);

                   translate([0,(hub_radius - ((hub_radius-shaft_radius)/2))*set_screw_nut_offset, ((hub_height/2) + (wheel_height/2 )) +
                    (((hub_height/2) + (wheel_height/2 )+set_screw_nut_diameter /2 )-fudge) /2] )
                    cube([max(min_set_screw_nut_diameter ,set_screw_nut_diameter ) ,max(set_screw_nut_thickness,0.25)-fudge,(((hub_height/2) + (wheel_height/2 )+max(min_set_screw_nut_diameter ,set_screw_nut_diameter ) /2 ))  ],center=true);
                    }

                    }
            }
            else {
                translate([0,0, ((hub_height/2) + (wheel_height /2))] )
                cylinder(r= min(hub_diameter/2, (outer_diameter/2)-fudge ), h = hub_height +(fudge*2), $fn = slit_count *2, center = true);
            }
        }
    };

 // shaft
    // cylindrical shaft
    if(shaft_type == 0){
        translate([0,0, ((shaft_depth/2) + (wheel_height /2) + (hub_height ))]) // move shaft to the top of the hub
        translate([0,0,-min(shaft_depth, hub_height+wheel_height)]) // insert the shaft until it hits bottom >:)

        cylinder(r= shaft_diameter/2, h=shaft_depth + (fudge*4) , $fn = max(slit_count*2, 6) ,center = true);
    }

    // d type shaft
    if(shaft_type == 1)
    {
        translate([0,0, ((shaft_depth/2) + (wheel_height /2) + (hub_height ))]) // move shaft to the top of the hub
        translate([0,0,-min(shaft_depth, hub_height+wheel_height)]) // insert the shaft until it hits bottom >:)

        difference(){
            cylinder(r= shaft_diameter/2, h=shaft_depth + (fudge*4) , $fn = max(slit_count*2, 6) ,center = true);

            translate([0, max( shaft_diameter - shaft_flat_depth , shaft_diameter/2),0  ])
            cube ( [shaft_diameter*2,shaft_diameter, shaft_depth*2 ], center = true)  ;
       }
    }

    // double d type shaft -- double D = big breasts --
    if (shaft_type == 2)
    {
        translate([0,0, ((shaft_depth/2) + (wheel_height /2) + (hub_height ))]) // move shaft to the top of the hub
        translate([0,0,-min(shaft_depth, hub_height+wheel_height)]) // insert the shaft until it hits bottom >:)

        difference(){
            cylinder(r= shaft_diameter/2, h=shaft_depth + (fudge*4) , $fn = max(slit_count*2, 6) ,center = true);

            translate([0, max( shaft_diameter - shaft_flat_depth , shaft_diameter/2),0  ])
            cube ( [shaft_diameter*2,shaft_diameter, shaft_depth*2 ], center = true);

            translate([0, min( -( shaft_diameter - shaft_flat_depth), -(shaft_diameter/2)),0  ])
            cube ( [shaft_diameter*2,shaft_diameter, shaft_depth*2 ], center = true);
        }
    }

    // square shaft
    if (shaft_type == 3)
    {
        translate([0,0, ((shaft_depth/2) + (wheel_height /2) + (hub_height ))]) // move shaft to the top of the hub
        translate([0,0,-min(shaft_depth, hub_height+wheel_height)]) // insert the shaft until it hits bottom >:)
        rotate([0,0,45])
        cylinder(r= shaft_diameter/2, h=shaft_depth + (fudge*4) , $fn = 4 ,center = true);
    }

    // hex shaft
    if (shaft_type == 4)
    {
        translate([0,0, ((shaft_depth/2) + (wheel_height /2) + (hub_height ))]) // move shaft to the top of the hub
        translate([0,0,-min(shaft_depth, hub_height+wheel_height)]) // insert the shaft until it hits bottom >:)

        cylinder(r= shaft_diameter/2, h=shaft_depth + (fudge*4) , $fn =   6  ,center = true);
    }

    // octopus shaft
    if (shaft_type == 5)
    {
        translate([0,0, ((shaft_depth/2) + (wheel_height /2) + (hub_height ))]) // move shaft to the top of the hub
        translate([0,0,-min(shaft_depth, hub_height+wheel_height)]) // insert the shaft until it hits bottom >:)
      rotate([0,0,22.5])
        cylinder(r= shaft_diameter/2, h=shaft_depth + (fudge*4) , $fn =   8  ,center = true);
    }
}
```