[User]
I'm looking to design a customizable laptop stand using OpenSCAD. I'd like it to be parametric, so I can easily adjust it for different laptops and viewing angles. The stand should consist of two identical pieces, one for the left side of the laptop and one for the right.

Here are the key parameters I need to control:

*   **`laptopAngle`**: The angle of the laptop in degrees, where a lower value results in a flatter angle (say, between 40 and 80 degrees).
*   **`laptopBottomThickness`**: The thickness of the laptop's bottom part (without the screen) in millimeters, which will determine the width of the support slot. Let's set a range of 10 to 35mm for this.
*   **`lineWidth`**: The width of the stand's lines or beams in millimeters.  I need to be able to set this between 4 and 10 mm with steps of 0.5 mm.
*   **`lineHeight`**: The height of the stand's lines, effectively the width of the stand along the z-axis (or the 3D print's z-axis). This should be adjustable between 15 and 50 mm, with steps of 5 mm.
*  **`feedHeight`**: This is the height (in mm) of the base "feet" to lift the stand a bit.  This can vary between 0 and 5 mm, with steps of 0.5mm.

I'd like the stand to have a few different line segments making up its shape:

1.  A base line that rises from the bottom to the front edge of the laptop.
2.  A horizontal line providing support along the bottom of the laptop.
3.  A back support line that rises up to meet the back of the laptop.
4. A shorter support line connecting the back push line to the horizontal line.
5. A "tail" at the back of the horizontal line, providing a bit more stability.

I'd also like the ability to add some options for 3D printing:

*   **`brims`**: A boolean option to add brims to the ends and corners of the stand to prevent warping during 3D printing (0 = no, 1 = yes).
*   **`twoIn1STL`**: A boolean option to export both the left and right stand pieces in a single STL file (0 = no, 1 = yes).

Finally, it'd be useful to have a few view options for development:

*   **`showLaptop`**: A boolean to show a simplified 3D model of the laptop on the stand, which will allow me to better visualize how the stand will support it, *but only when previewing*.
*   **`showCenterPoints`**: A boolean to show the center points of each of the line endpoints (mainly for development, again only when previewing).

I'm not looking for any specific libraries to be used.

Could you generate the OpenSCAD file for me?

[Assistant]
Customizable_Laptop_Stand_-_version_1.23.scad:
```
// Customizable Laptop Stand
// =========================
//
// Date   : 2020.05.15
// Version: 1.23
// License: Creative Commons - BY NC SA
// Author : Erikjvl
// Shared : https://www.thingiverse.com/prototype-improve-share

//Customizer user interface
/*[Customizable Laptop Stand - The model]*/
//Laptop angle (in degrees, lower value is flatter)
laptopAngle=60; // [40:2:80]

//Laptop bottom thickness (in mm)
laptopBottomThickness=20; // [10:35]

//Line width (in mm)
lineWidth=6; // [4:0.5:10]

//Line height (in mm), is the laptop stand width
lineHeight=25; // [15:5:50]

//Feed height (in mm), to make a stable stand
feedHeight=2; // [0:0.5:5]

/*[3D Print settings]*/
//Custom 3D printer brims (outerend and corners only)
brims=0; // [0:no, 1:yes]
//Thingiverse customizer can't show boolean checkboxes. -->Yes/No option

//Left and right stand in 1 STL
twoIn1STL=0; // [0:no, 1:yes]

/*[View settings (offline openScad)]*/
//Show (animated) laptop on the two stands
showLaptop=false; // [false, true]

//Show centerpoints of line ends
showCenterPoints=true; // [false, true]

//End of customizer user interface

//Constant
$fn=$preview ? 36 : 120;;
laptopDepth=240*1;
alpha=($t) ? 40+40*$t : laptopAngle;

//Viewpoint in animation
$vpr = (true) ? [0, -10+20*$t, -20*$t] : 0; //The "if true" is to hide the setting in Thingiverses customizer.
$vpd = (true) ? 1800-300*$t : 0;
$vpt = (true) ? [90,200,100] : 0;

//Calculated coordinates
horLineY=feedHeight+0.15*lineWidth;
horizontalX1=tan(90-alpha)*horLineY;
horizontalX2=80+cos(alpha)*40;

frontEdgeLength=horizontalX1+feedHeight+(laptopBottomThickness/sin(alpha));
frontEdgeX2=cos(alpha)*frontEdgeLength;
frontEdgeY2=sin(alpha)*frontEdgeLength;
backpushY1=50*1;
backpushX1=lineWidth/2+((0.5*lineWidth+laptopBottomThickness)/sin(alpha)+(backpushY1+feedHeight)/tan(alpha));
backpushX2=horizontalX2;
backpushY2=horLineY;

backpushSupportX1=backpushX1;
backpushSupportY1=horLineY;
backpushSupportX2=backpushX1+0.25*(backpushX2-backpushX1);
backpushSupportY2=backpushY1+0.25*(backpushY2-backpushY1);

tailX1=horizontalX2;
//tailX2=horizontalX2+15+cos(alpha)*40;
tailX2=(laptopDepth*cos(alpha) > tailX1+12) ? laptopDepth*cos(alpha) : tailX1+12;

//The lines of the laptop stand
lines=[
    [0, 0, frontEdgeX2, frontEdgeY2, lineWidth, lineHeight],
    [horizontalX1, horLineY, horizontalX2, horLineY, lineWidth, lineHeight],
    [backpushX1, backpushY1, backpushX2, backpushY2, lineWidth, lineHeight],
    [backpushSupportX1, backpushSupportY1, backpushSupportX2, backpushSupportY2, 0.33*lineWidth, lineHeight],
    [tailX1, horLineY, tailX2, 0, lineWidth, lineHeight]
];

//Actual program to create 3D model of the laptop stand.
if (showLaptop && $preview){
    laptopMoveX=
    (1+1.4*sin(alpha)*((0.5*lineWidth+ horizontalX1)/sin(alpha)) +(laptopBottomThickness/sin(alpha)));

    laptopMoveY=horLineY+0.5*lineWidth;
    laptopMoveZ=-200;

    translate([0,0,-200+15]) stand();
    translate([laptopMoveX, laptopMoveY, laptopMoveZ]) laptop();
    translate([0,0,200-15-lineHeight]) stand();
} else {
    if (twoIn1STL) {
        translate([0,10,0]) stand();
        mirror([0,1,0]) stand();
    } else {
        stand();
    }
}
//End of program

//Modules ===================================================
module stand(){
    for (i=[0:len(lines)-1]) {
        line(lines[i][0], lines[i][1],   //x1,y1
        lines[i][2], lines[i][3],   //x2,y2
        lines[i][4],lines[i][5]);   //width, height
    }
}

module laptop(){
    rotate([0, 0, alpha]) difference(){ // laptop bottom with keyboard
        color("Black")
                cube([laptopDepth, laptopBottomThickness, 400]);

        color("Blue"){
            translate([0.50*laptopDepth,laptopBottomThickness-2,20])
                cube([0.3*laptopDepth, 4, 240]);
            translate([0.50*laptopDepth,laptopBottomThickness-2,400-20-100])
                cube([0.3*laptopDepth, 4, 120]);

        }
    }

    difference(){ //laptop lid with screen
        color("Gray")
            translate([cos(alpha)*laptopDepth, sin(alpha)*laptopDepth, 0])
                cube([4, laptopDepth, 400]);
        color("White")
            translate([cos(alpha)*laptopDepth-3, sin(alpha)*laptopDepth+30, 20])
                cube([4, laptopDepth-40, 360]);
    }
}

module line(x1,y1, x2,y2, width, height){
    hull(){
        translate([x1,y1,0]) cylinder(d=width, h=height);
        translate([x2,y2,0]) cylinder(d=width, h=height);
    }
    if (showCenterPoints && $preview){
        color("Red"){
            translate([x1,y1,-0.5]) cylinder(d=1, h=height+1);
            translate([x2,y2,-0.5]) cylinder(d=1, h=height);}
    }
    if ((brims && !showLaptop) || (brims && !$preview)) {
        //Manual brims
        color("Blue"){
            translate([x1,y1,0]) cylinder(d=20, h=0.4);
            translate([x2,y2,0]) cylinder(d=20, h=0.4);
        }
    }
}
//End of modules ============================================
//End of file
```


[User]
I'd like an OpenSCAD design for a Voronoi-patterned holder. It should have a cylindrical base with the Voronoi pattern cut out from the side.

Here are the specifics:

*   **Overall Shape:** The base should be a cylinder, and the Voronoi cutout should wrap around the cylinder's curved side.
*   **Voronoi Pattern:** The Voronoi pattern should be generated from a rectangular grid, which should have a parameter to control grid width. The grid of Voronoi cells should be inset slightly, creating some spacing between the cells and the cylinder outline.
*   **Dimensions:**  I'd like to be able to control the overall size (length and height) of the rectangular area used to calculate the Voronoi cells, and the thickness of the material. The radius of the cylindrical part will depend on the length/size of the overall shape used to generate the Voronoi pattern.
*   **Parameters:** I need to be able to control the following:
    *   `size`: A 2D vector representing the dimensions of the rectangular area used to generate the Voronoi cells.
    *   `grid_w`: The width of the grid for Voronoi cell generation (number of columns in the Voronoi grid).
    *   `thickness`: The thickness of the material used for the base of the cylinder, and for the material of the Voronoi pattern.
    *   `spacing`:  The amount of space between the edges of the cylinder cutout and the Voronoi cells.
    *   `frags`: The number of fragments for all circles (for smooth curvature).
*   **Additional Features:** The design needs to have:
    *  A small bottom ring (linear extrusion of a circle) that is slightly bigger than the main part, which is also a linear extrude.
    *  A small top ring (linear extrusion of a circle) that is slightly smaller than the main part, which is also a linear extrude.

The design should use the `dotSCAD` library, specifically `vrn2_cells_space.scad`, `bend_extrude.scad`, and `arc.scad`.

Could you generate a parametric design for this?

[Assistant]
voronoi_holder.scad:
```
use <bend_extrude.scad>;
use <arc.scad>;
use <voronoi/vrn2_cells_space.scad>;

size = [200, 72];
grid_w = 8;        // grid_w must divide size equally.
thickness = 2;
spacing = 1.5;
frags = 24;

module voronoi_holder() {
    half_spacing = spacing / 2;
    cells = vrn2_cells_space(
        size = size,
        grid_w = grid_w
    );

    r = size[0] / (2 * PI) - thickness * 1.5;

    difference() {
        bend_extrude(size = size, thickness = thickness * 3, angle = 360, frags = frags)
        render()
        difference() {
            square(size);
            render()
                for(cell = cells) {
                    offset(-half_spacing)
                    polygon(cell[1]);
                }
        }
        linear_extrude(size[1] - thickness)
           arc(radius = r, angle = 360, width = thickness, $fn = frags);
    }

    linear_extrude(thickness)
        circle(r + thickness * 1.75, $fn = frags);

    linear_extrude(thickness * 2)
        circle(r - 0.25 * thickness, $fn = frags);
}

voronoi_holder();

```


[User]
Hey, I'm looking to get some help with designing a parametric nose clip for fabric face masks. I've been trying to adjust existing designs, but I'm having a hard time getting exactly what I want, and frankly the code is pretty hard to follow. Could you help me generate a new OpenSCAD file (or files) that can do this?

The basic idea is a clip that goes across the bridge of the nose and then extends out to the cheeks, and I want to be able to customize the shape quite a bit. Here’s what I’m thinking:

First off, I need to control the overall dimensions. I need parameters for:
- `whole_width`: The distance between the end points of the clip (cheek to cheek), in mm.
- `whole_height`: The distance from the bridge of the nose to the line between the endpoints, in mm.

Then for the nose portion specifically, I need to control:
- `nose_width`: How wide the clip is where it transitions from the nose to the cheeks, in mm.
- `nose_height`: How far from the bridge of the nose to the line where it transitions to the cheeks, in mm.

And I need a way to add some curvature to the nose part:
- `nose_width_variance`: A percentage variance for the nose width from the top to the bottom of the clip. So, a value of 0 means the nose width is constant, and 10 would mean that the bottom of the nose section is 10% less wide than the top.
- `nose_height_variance`: A percentage variance in the nose height, similar to the nose width variance, from top to bottom of the clip.

For the actual clip itself, I need:
- `fabric_gap`: The space for the mask material's thickness in mm.
- `base_thickness`: The thickness of the base where the main body connects to the clip portion, in mm.
- `fillet_multiplier`: A percentage that controls the fillet height where the base meets the vertical clip part.

I also need some parameters for the band portion of the clip:
- `band_thickness`: How thick the band is, in mm.
- `width`: How wide the band is, in mm.

Finally, I would like options for how the cheek part transitions to the nose part:
- `transition_option`: An integer that selects the transition type: 0 for straight, 1 for a bump, and 2 for a slit.
- `transition_multiplier`: A float that controls the bump's size or the slit's position, depending on the selected `transition_option`.

I'd also like a function or module to create the bump at the nose to cheek transition if `transition_option` is set to 1. This bump should smoothly transition the band outwards.

The different transitions are important. "Straight" would be a basic transition with no additional features. "Bump" would create a small, curved bulge outwards from the main shape at the transition point. The "slit" option should create an indent where the material of the mask can be inserted between the nose and cheek portions.

I hope that's not too complicated, but let me know if you have questions. Also, please don't use any external libraries like BOSL2. I just need the base OpenSCAD program and its standard functions to generate the file.

[Assistant]
Parameterized_Nose_Clip_Remix_v0.scad:
```
// TeslaCoiled Remix of nosepiece for fabric mask
// A remix of : Version 3 of "nosepiece for fabic mask" by Kevin Karplus, 2020 April 30

/* [Nose-shape parameters] */

// how far are apart are end points (cheek to cheek) in mm?
whole_width=75;    // [25:1:100]
// how far from bridge of nose to line between endpoints in mm?
whole_height=35;  // [15:0.5:60]

// how wide where switching from nose to cheeks in mm?
nose_width=23;    //  [7:1:30]
// how far from bridge of nose to line between nose-cheek transitions in mm?
nose_height=19;   // [8:0.5:30]

// % variance in nose width from top to bottom of the clip
nose_width_variance=10; // [0:1:30]

// % variance in nose height from top to bottom of the clip
nose_height_variance=11; // [0:1:30]

/* [Clip parameters] */
// How much space for thickness of mask in mm?
fabric_gap =  2; // [0.5:0.1:4.5]
// How thick is base joining the main body and clips in mm?
base_thickness=2;  // [1.0:0.2:3.0]
// % of fabric gap for height of fillet
fillet_multiplier=100; //[0:10:300]

/* [Band parameters] */
// How thick is the band (in mm)?  (tradeoff: flexibility vs strength)
band_thickness = 1.5;  // [0.2:0.1:3.0]
// How wide is the band covering the mask (in mm)?
width= 13;   // [5:0.5:25]
// Cheek to Nose transsition option. 0 = straight, 1 = bump, 2 = slit
transition_option = 0; // [0:1:2]
// Changes how big the bump at the transition from Cheek to Nose is, or shifts the slit left and right
transition_multiplier=0.75; // [0.5:0.01:1]

// derived values:

varY = 1-(nose_height_variance/100);
varX = 1-(nose_width_variance/100);

// SHAPE AND LOCATION OF CLIP
// how thick is the clip part?
clip_thickness = band_thickness+fabric_gap;

// for shape of main piece
cheek_clip = [(nose_width/2)+clip_thickness*2,-whole_height+nose_height+clip_thickness*2,0];
nose_cheek = [nose_width/2,-whole_height+nose_height,0];  // where nose meets cheek
outer_cheek =  [whole_width/2,0,0];  // outer corner of cheek piece
b_angle = 180+atan2(cheek_clip[0]-nose_cheek[0],cheek_clip[1]-nose_cheek[1]);

// where on the main body does the clip start?
clip_corner= cheek_clip+
    (2*fabric_gap/norm(outer_cheek-cheek_clip))*(outer_cheek-cheek_clip);
// what angle is the clip at
clip_angle = 90-atan2(outer_cheek[0]-clip_corner[0],outer_cheek[1]-clip_corner[1]);

// The path for the shape of the cheek and transition to the nose bridge
cheek = [outer_cheek,
        cheek_clip,
        nose_cheek
        ];

// set up the points for the shape of the bottom of the nose-bridge piece
bridge_bot = [
    [nose_width/3.5,-whole_height+(nose_height/4),width],
    [nose_width/4,-whole_height+(nose_height/6),width],
    [(nose_width/6),-whole_height+(nose_height/14),width],
    [(nose_width/9),-whole_height+(nose_height/30),width],
    [(nose_width/20),-whole_height,width],
    [0,-whole_height,width]
    ];

// get nose-bridge top points by applying variance multipliers to the bottom points
bridge_top = [
    [bridge_bot[0][0]*varX,bridge_bot[0][1]*varY,0],
    [bridge_bot[1][0]*varX,bridge_bot[1][1]*varY,0],
    [bridge_bot[2][0]*varX,bridge_bot[2][1]*varY,0],
    [bridge_bot[3][0]*varX,bridge_bot[3][1]*varY,0],
    [bridge_bot[4][0]*varX,bridge_bot[4][1]*varY,0],
    [bridge_bot[5][0]*varX,bridge_bot[5][1]*varY,0]
    ];

module bridge_extrude(points1, points2, points3,sw) {
// This module performs the hull connections (creates 3d shape from the points) to create one side of the clip shape.
//  points1 = cheek points
//  points2 = bridge points (top or bottom)
//  points3 = bridge points (top or bottom)

    $fn=16;
    // Draw the cheek part
    for(i=[0:len(points1)-3]){
        hull(){
            translate(points1[i]) cylinder(r=band_thickness/2, h=width-band_thickness/2);
    translate(points1[i+1]) cylinder(r=band_thickness/2, h=width-band_thickness/2);
                        translate(points1[i]+[0,0,width-band_thickness/2]) sphere(r=band_thickness/2);
    translate(points1[i+1]+[0,0,width-band_thickness/2]) sphere(r=band_thickness/2);
        }
    }

    // This is the transition piece with the option to do a bump, a slit, or none.
    // 0 = none
    // 1 = bump
    // 2 = slit
    if(sw==0) { // Straight transition
        hull() {
            translate(points1[len(points1)-2]) cylinder(r=band_thickness/2, h=width-band_thickness/2);            translate(points1[len(points1)-1]) cylinder(r=band_thickness/2, h=width-band_thickness/2);
        translate(points1[len(points1)-2]+[0,0,width-band_thickness/2]) sphere(r=band_thickness/2);            translate(points1[len(points1)-1]+[0,0,width-band_thickness/2]) sphere(r=band_thickness/2);

        }
    } else {
        if(sw==1) { // Bump transition
            union(){
                                  // derived helper values
                    bump_angle = [cos(b_angle),sin(b_angle),1];
                    mid_length = norm(points1[len(points1)-2]-points1[len(points1)-1])/2;
                    midpoint = points1[len(points1)-2] + vMult(bump_angle,[mid_length,mid_length,0]);
                    bump_points = [midpoint-vMult(bump_angle,[mid_length*transition_multiplier,mid_length*transition_multiplier,0]),midpoint+vMult(bump_angle,[mid_length*transition_multiplier,mid_length*transition_multiplier,0])];

            // straight piece to clip section
         hull (){
               translate(points1[len(points1)-2]) roundedPoint(band_thickness, width);
                translate(bump_points[0]) roundedPoint(band_thickness, width);            }
            // straight piece to nose-bridge section
         hull (){
               translate(points1[len(points1)-1]) roundedPoint(band_thickness, width);
                translate(bump_points[1]) roundedPoint(band_thickness, width);            }
                // bump
                //diam height thickness resolution
                translate(midpoint) rotate([0,0,270-b_angle]) theBump(2*mid_length*transition_multiplier,width,band_thickness,7);

//                    nose_bump(points1, nose_bubble, b_angle,width, band_thickness);
                // second straight piece
//                hull() {
//                    translate(points1[len(points1)-2]) cylinder(r=band_thickness/2, h=width);
//                translate(points1[len(points1)-1]) cylinder(r=band_thickness/2, h=width);
//                    }
                    }
        } else {
            if(sw==2) { // Slit transition

                   // derived helper values
                    slit_multiplier = (transition_multiplier - 0.75)/0.25;
                    slit_angle = [cos(b_angle),sin(b_angle),1];
                    slit_angle_perp = [cos(b_angle+90),sin(b_angle+90),1];
                    mid_length = norm(points1[len(points1)-2]-points1[len(points1)-1])/2;
                    midpoint = points1[len(points1)-2] + vMult(slit_angle,[mid_length,mid_length,0])+vMult(slit_angle,[(mid_length-fabric_gap-band_thickness/2)*slit_multiplier,(mid_length-fabric_gap-band_thickness/2)*slit_multiplier,0]);
                    slit_points = [midpoint-vMult(slit_angle,[band_thickness/2+fabric_gap/2,band_thickness/2+fabric_gap/2,0]),midpoint+vMult(slit_angle,[band_thickness/2+fabric_gap/2,band_thickness/2+fabric_gap/2,0])];

                    // straight_piece towards bridge
                 hull() {
                        translate(points1[len(points1)-2]) cylinder(r=band_thickness/2, h=width-band_thickness/2);
                   translate(points1[len(points1)-2]+[0,0,width-band_thickness/2]) sphere(r=band_thickness/2);
                     translate(slit_points[0]+[0,0,width-band_thickness/2]) sphere(r=band_thickness/2);
                     translate(slit_points[0]) cylinder(r=band_thickness/2, h=width-band_thickness/2);
                    }
                    // straight piece towards nose
                 hull() {

                     translate(slit_points[1]+[0,0,width-band_thickness/2]) sphere(r=band_thickness/2);
                     translate(slit_points[1]) cylinder(r=band_thickness/2, h=width-band_thickness/2);
        translate(points1[len(points1)-1]) cylinder(r=band_thickness/2, h=width-band_thickness/2);
        translate(points1[len(points1)-1]+[0,0,width-band_thickness/2]) sphere(r=band_thickness/2);

                    }

                    translate(midpoint-vMult(slit_angle_perp,[-band_thickness/2,-band_thickness/2,0])) rotate([0,0,b_angle])
                   difference() {
                       cylinder(d=fabric_gap+2*band_thickness, h=base_thickness*2);
                       translate([0,0,base_thickness*1.75]) cube([fabric_gap,fabric_gap+2*band_thickness,base_thickness],center=true);
                       translate([0,-band_thickness*(3/2),base_thickness*(3/4)])  cube([fabric_gap+2*band_thickness,fabric_gap,base_thickness*3],center=true);

                      translate([0,0,base_thickness*1.75-base_thickness/2])
                       linear_extrude(band_thickness*2)
                       polygon([
                       [0,-band_thickness/2],
                       [0,(fabric_gap+2*band_thickness)/2],
                       [-cos(b_angle)*(fabric_gap+2*band_thickness),(fabric_gap+2*band_thickness)/2]]);
                       }

            }

            }
            }

    // Draw the transition from the cheek to the first part of the nose-bridge
    hull(){
        translate(points1[len(points1)-1]) cylinder(r=band_thickness/2, h=width-band_thickness/2);
        translate(points1[len(points1)-1]+[0,0,width-band_thickness/2]) sphere(r=band_thickness/2);
        translate(points2[0]) cylinder(r=band_thickness/2, h=0.1);
        translate(points3[0]+[0,0,-band_thickness/2]) sphere(r=band_thickness/2);
    }

    // Draw the rest of the nose-bridge
    for(q=[0:len(points2)-2]){
        hull(){
            translate(points2[q]) cylinder(r=band_thickness/2, h=0.1);
            translate(points3[q]+[0,0,-band_thickness/2]) sphere(r=band_thickness/2);
            translate(points2[q+1]) cylinder(r=band_thickness/2, h=0.1);
            translate(points3[q+1]-[0,0,band_thickness/2]) sphere(r=band_thickness/2);
        }
    }
}

module rounded_rod(ends, diam)
 // make a rod from ends[0] to ends[1] of diameter diam
 // that has spherical endcaps.
 // No part of the rod extends past end1 or end2
{
    end1=ends[0];
    end2=ends[1];
    rod_length = norm(end1-end2);
    center=(end1+end2)/2;
    assert(diam <= rod_length);
    $fa=5; $fn=20;
    c1 = end1 + diam/(2*rod_length) *(end2-end1);
    c2 = end2 + diam/(2*rod_length) *(end1-end2);
    hull() {
        translate(c1) sphere(d=diam);
        translate(c2) sphere(d=diam);
    }
}

function vMult(v1, v2) = [v1[0]*v2[0],v1[1]*v2[1], v1[2]*v2[2]];

module clip(top,bott, side="left")
{
    $fn=16;
    //horizontal base of clip
    clip_length=norm(top-bott);
    angle = 90-atan2(bott[0]-top[0],bott[1]-top[1]);

    angle_shift =  [-cos(90-angle),sin(90-angle),1];
    top_band = [top[0]+angle_shift[0]*(band_thickness/2),top[1]+angle_shift[1]*(band_thickness/2),0];
    bottom_band = [bott[0]-cos(90-angle)*(band_thickness/2),bott[1]+sin(90-angle)*(band_thickness/2),0];
    band_edge = [top_band, bottom_band];
    top_inner = band_edge[0]+vMult(angle_shift,[fabric_gap, fabric_gap,0]);
    bottom_inner = band_edge[1]+vMult(angle_shift,[fabric_gap, fabric_gap,0]);
    inner_edge = [top_inner, bottom_inner];

    clip_edge = [inner_edge[0]+vMult(angle_shift,[band_thickness/2, band_thickness/2,0]), inner_edge[1]+vMult(angle_shift,[band_thickness/2, band_thickness/2,0])];

    // base of clip
    translate(band_edge[0])
       rotate([90,0,angle+90])
           cube([(fabric_gap),base_thickness,clip_length]);

    //fillet to strengthen base
    color("blue") translate(band_edge[0] + [0,0,base_thickness])
       rotate([90,0,angle+90]) linear_extrude(clip_length)
    polygon(points=[[0,0],
        [0.5*fabric_gap,0],
        [0,0.5*(clip_thickness-band_thickness)*fillet_multiplier/100]]);

    color("blue") translate(inner_edge[1] + [0,0,base_thickness])
       rotate([90,0,angle+270]) linear_extrude(clip_length)
    polygon(points=[[0,0],
        [0.5*fabric_gap,0],
        [0,0.5*(clip_thickness-band_thickness)*fillet_multiplier/100]]);;

    // vertical part of clip
     color("red") hull(){
        translate([clip_edge[0][0],clip_edge[0][1],0]) cylinder(d=band_thickness, h=width-band_thickness/2);
        translate([clip_edge[1][0],clip_edge[1][1],0]) cylinder(d=band_thickness, h=width-band_thickness/2);
        translate([clip_edge[0][0],clip_edge[0][1],0]+[0,0,width-band_thickness/2]) sphere(d=band_thickness);
        translate([clip_edge[1][0],clip_edge[1][1],0]+[0,0,width-band_thickness/2]) sphere(d=band_thickness);
    }

    // bump on clip to hold fabric
    translate([0,0,width-band_thickness])
       rounded_rod(inner_edge,
                diam=band_thickness);
}
color("red") union(){
bridge_extrude(cheek, bridge_top, bridge_bot, transition_option);
mirror([1,0,0]) bridge_extrude(cheek, bridge_top, bridge_bot, transition_option);
}
color("pink") clip(clip_corner,outer_cheek);
color("pink") mirror([1,0,0]) clip(clip_corner,outer_cheek);

module roundedPoint(thickness, height){
       hull(){
            cylinder(d=thickness,h=height-thickness/2);
            translate([0,0,height-thickness/2]) sphere(d=thickness);
            }

}

module theBump (diam, height, thickness, resolution){
    $fn=16;

    for(i=[0:resolution-1]){
        hull(){
            translate([(diam/2)*cos(i*(180/resolution)),(diam/2)*sin(i*(180/resolution)),0]) roundedPoint(thickness,height);
            translate([(diam/2)*cos((i+1)*(180/resolution)),(diam/2)*sin((i+1)*(180/resolution)),0]) roundedPoint(thickness,height);
        }

    }
}
```


[User]
Hey, I'm looking to create a customizable planter that's kind of cute and whimsical. I saw this thing on Thingiverse ([https://www.thingiverse.com/apps/customizer/run?thing_id=4492176](https://www.thingiverse.com/apps/customizer/run?thing_id=4492176)) but I'd like to generate the code myself so I can understand it. It has a bulbous body, little legs, arms, and a simple face.

Here's what I'm thinking for the parameters:

**Body:**

*   `shell`: Thickness of the body in mm.
*   `body_inner_r`: Radius of the inner body in mm. The outer radius would be this plus the shell thickness.
*   `body_h`: Height of the main body (excluding the bottom bulge) in mm.
*   `butt_factor`: Controls how bulbous or flat the bottom is, 0 being completely flat.

**Legs:**

*   `legs_rotation`: Angle of the legs, negative for outwards, 0 for straight, positive for inwards.
*   `crotch`: Distance between the legs at the base, in mm.
*   `leg_h`: Height of the legs, in mm.
*   `leg_r`: Radius of the leg and ankle, in mm.

**Arms:**

*   `arms_rotation`: Similar to the legs, angle of the arms from outwards (negative) to inwards (positive).
*   `shoulders`: Distance between the shoulders, in mm.
*   `shoulder_h`: Height of the shoulder relative to the bottom of the body.
*   `arm_h`: Length of the arms, in mm.
*  `arm_r`: Radius (thickness) of the arms, in mm.
*   `arm_raise_rotation`: Angle the arms tilt away from the body, positive for outward.
* `fist_factor`: Multiplier for the thickness of the fist, greater than one for bigger fists.

**Face:**

*   `temple`: Distance between the eyes, in mm.
*   `eyes_h`: Height of the eyes, in mm.
*   `eye_r`: Radius of the eye, in mm.
*   `eyes_to_mouth_h`: Vertical distance between the eyes and the mouth, in mm.
*   `mouth_r`: Radius of the mouth when making the :o face, in mm.
*   `mouth_open_deg`: How open the mouth is in degrees, 180 would be a :D shape, 360 would be an :o shape.
*   `mouth_tilt_deg`: Tilts the mouth to make it D:, 0 degrees is upright.
* `mouth_stretch_open`: A scale factor that stretches the mouth opening.
*   `mouth_stretch_wide`: A scale factor that makes the mouth wider.
*   `lip_factor`: Thickness of the lip. If this is made big enough, you can use it to make a open mouth without using the rotation of mouth_open_deg.
*   `whisker_h`: Length of the whisker, 0 means no whisker.
*   `whisker_gap`: Gap between each whisker on one side of the face, in mm.
*   `snout`: Distance between the whiskers, in mm.
*   `snout_h`: Height of the whiskers relative to the eyes, in mm.
*   `snout_factor`: A scale factor to change all snout dimensions at the same time.

I'd prefer the code to be in OpenSCAD. I think the original design used the standard OpenSCAD libraries, but let me know if you think anything else is needed. Could you create an OpenSCAD file based on these parameters that I can modify?

[Assistant]
cute_planter.scad:
```
// preview[view:south, tilt:side]

/* [Body] */

// Thickness of the body, in mm.
shell = 3;

// Radius of the inner body, in mm. Add shell to calculate the outer body radius.
body_inner_r = 46;

// Height of the body (not including the butt), in mm.
body_h = 85;

// How bulbous should the bottom of the planter be, where flat = 0. If you made the butt too flat, you may have to enable print supports.
butt_factor = 0.2;

/* [Legs] */
// Legs point outwards (negative), straight (0) or inwards (postive), in degrees.
legs_rotation = -4; // [-89:89]

// Distance between the legs at the crotch, in mm.
crotch = 60;

// Height of the legs, in mm.
leg_h = 15;

// Radius of the leg and the ankle, in mm.
leg_r = 5;

// Arms point outwards (negative), straight (0) or inwards (positive), in degrees.
arms_rotation = -5;

// Distance between the arms, in mm.
shoulders = 80;

// Shoulder height relative to the bottom of the body (0 = hands at bottom), in mm.
shoulder_h = -16;

// Length of the arm, in mm.
arm_h = 20;

// Thickness of the arm, in mm.
arm_r = 5;

// Rotation of arm away from body (positive = hands outward) in degrees.
arm_raise_rotation = 12;

// Thickness of fists relative to arm (greater than 1 = bigger).
fist_factor = 1.2;

/* [Face] */
// Distance between eyes, in mm.
temple = 32;

// Height of eyes relative to bottom, in mm.
eyes_h = 56;

// Radius of eye, in mm.
eye_r = 3;

// Distance between eyes and mount, in mm.
eyes_to_mouth_h = 9;

// Radius of mouth making :o face, in mm.
mouth_r = 2;

// Mouth openness (180 = :D, 360 = :o), in degrees.
mouth_open_deg = 180; // [0:360]

// Mouth tilt, (180 = D:), in degrees.
mouth_tilt_deg = 0; // [0:180]

// When greater than 0, like this: :<==>
mouth_stretch_open = 0.3;

// When greater than 0, like this: .____.
mouth_stretch_wide = 0.3;

// Thickness of lips. If its large enough, its an open mouth!
lip_factor = 10;

// Length of the whisker, in mm. 0 = no whiskers.
whisker_h = 0;

// Gap between each whisker on one side of face, closest to nose, in mm.
whisker_gap = 2;

// Distance between whiskers, in mm.
snout = 26;

// Position of whiskers relative to eyes (larger = farther below), in mm.
snout_h = 8;

// Enlarges/shrinks whisker proportions and the above measurements.
snout_factor = 1;

/* [Hidden] */
$fa = 1;
$fs = 2;
body_r = body_inner_r + shell;

module fillet_cylinder(h, r1, r2, fillet) {
    union() {
        cylinder(h, r1, r2);
        if (h>0) scale([1,1,fillet]) sphere(r1);
    };
};

difference() {
    union() { // sealing the face
        difference() {
            union() {
                // outer body
                fillet_cylinder(body_h, body_r, body_r, butt_factor);

                // legs
                for (i=[0:2])
                    rotate(a=[0,0,i*120]) rotate(a=[-legs_rotation,0,legs_rotation]) translate([0,crotch/2,-leg_h]) fillet_cylinder(leg_h, leg_r, leg_r*1.3, 0.4);

                // arms
                translate([0,0,-shoulder_h])
                    for (i=[-1,1])
                        rotate(a=[0,arms_rotation*i,shoulders/2*i]) rotate(a=[-arm_raise_rotation,0,0]) translate([0,-body_r-(arm_raise_rotation*.25),0]) scale([1,.6,1])  union() {
                            fillet_cylinder(arm_h, arm_r*fist_factor, arm_r, 0.4);
                            if (arm_h>0) translate([0,0,arm_h]) scale([1,1,0.6]) sphere(arm_r);
                        }
            }

            // face
            translate([0,0,eyes_h]) {
                // eyes
                for (i=[-1,1])
                    rotate(a=[0,0,temple/2*i]) translate([0,-body_r,0]) scale([1,0.4,1]) sphere(eye_r);

                // mouth
                translate([0,0,-eyes_to_mouth_h])
                        translate([0,-body_r,0])
                            scale([mouth_stretch_wide,1,mouth_stretch_open])
                                rotate(a=[90,((180-mouth_open_deg)/2)+mouth_tilt_deg,0])
                                    rotate_extrude(angle = -mouth_open_deg, convexity = 10)
                                        translate([lip_factor, 0, 0])
                                            circle(r = mouth_r);

                // whiskers
                translate([0,0,-snout_h]) translate([0,-body_inner_r,0]) {
                    for (i=[0,1])
                        mirror([i,0,0]) for (j=[-1,0,1])
                            translate([snout/2,0,whisker_gap*-j]) rotate(a=[0,90+(10*j),0]) scale([snout_factor,10*snout_factor,snout_factor]) cylinder(whisker_h, 1, 1);
                }
            }
        }

        // sealing outer shell
        if (shell > 1) fillet_cylinder(body_h-shell, body_r - shell + 1, body_r - shell + 1, butt_factor);
    }

    // shell
    translate([0,0,shell]) fillet_cylinder(body_h+1, body_r - shell, body_r - shell, max(butt_factor/3, 0));
}
```


[User]
I need an OpenSCAD design for a screw-top container, and I want it to be parametric so I can easily adjust the size and other features. I'd like it to include a separate, flexible seal that will make it watertight.

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

*   **`d_diameter`**: The approximate diameter of the container.
*   **`d_length`**: The length of the screw threads.
*   **`d_bottom_height`**: The height of the bottom part of the container.
*   **`d_number_of_sides`**: The number of sides on the outer part of the container (for a faceted, rather than round, look).
*   **`d_divs`**: The resolution used for circles and threads (higher is smoother but renders slower). This should control the `$fn` parameter in OpenSCAD primitives.
*   **`generate_bottom`**: A boolean to enable or disable generation of the bottom container part.
*   **`generate_top`**: A boolean to enable or disable the top container part.
*   **`generate_seal`**: A boolean to enable or disable the separate, flexible seal part.
*   **`d_pitch`**: The pitch of the screw threads.

I want the design to be a screw-top, with the threads created using the `threads-library-by-cuiso-v1.scad` library.

The container should have a main body which is a hollow cylinder with a faceted exterior. The inside of the bottom part should be hollow, with the screw thread at the top of this hollow. The top part should be a cap with threads that mate with the threads on the bottom part.

The flexible seal should be a simple cylinder that fits snugly between the top and bottom parts when they are screwed together. It should be slightly wider than the inside of the container and slightly taller than the space it will fill, so it will be compressed when the container is closed.

I'd also like the walls of the container to have a variable thickness, based on the diameter. The calculation I used was `wall_thickness = 7 + (d_diameter * 0.07)`. Also, I calculated a horizontal offset with `part_offset = d_diameter + (wall_thickness * 3)` that should separate the parts.

Can you generate the OpenSCAD files for this design?

[Assistant]
screwcontainer_watertight_all_parts.scad:
```
use <threads-library-by-cuiso-v1.scad>

// Approximate container diameter
d_diameter=35;

// Length of the screw
d_length=8;

// Height of the bottom container
d_bottom_height = 20;

// Number of sides on the outside of container
d_number_of_sides=8;

// Resolution. Equates to the $fn parameter. Higher means smotther but more rendering time
d_divs=120;

// Generate the bottom part of the container
generate_bottom=true;

// Generate the top part of the container
generate_top=true;

// Generate the seal (this will need flexible filament to work)
generate_seal=true;

// Screw pitch
d_pitch=3;

wall_thickness = 7 + (d_diameter * 0.07);
part_offset = d_diameter + (wall_thickness * 3);

if(generate_bottom) {
    difference() {
        union() {
            translate([0, 0, d_bottom_height+2]) {
                thread_for_screw_fullparm(diameter=d_diameter, length=d_length, pitch=d_pitch, divs=d_divs);
            }
            cylinder(d=d_diameter+wall_thickness, h=d_bottom_height+2, $fn=d_number_of_sides);
            cylinder(d=d_diameter-1, h=d_bottom_height+4, $fn=d_divs);
        }
        translate([0, 0, 3]) {
            cylinder(d=d_diameter-7, h=d_bottom_height+d_length+12, $fn=d_divs);
        }
    }
}

if(generate_top) {
    translate([part_offset, 0, 0]) {
        difference() {
            cylinder(d=d_diameter + wall_thickness, h=d_length + 3, $fn=d_number_of_sides);
            translate([0, 0, 3]) {
                thread_for_nut_fullparm(diameter=d_diameter, length=d_length + 0.05, pitch=d_pitch, divs=d_divs);
            }
        }
    }
}

if(generate_seal) {
    translate([0, part_offset, 0]) {

        difference() {
            cylinder(d=d_diameter+wall_thickness, h=2, $fn=d_number_of_sides);
            translate([0, 0, -1]) {
                cylinder(d=d_diameter-1, h=4, $fn=d_divs);
            }
        }
    }
}

```
threads-library-by-cuiso-v1.scad:
```
/*
"OpenScad library. Threads for screws and nuts V1"
by ANDRES ROMAN (AKA Cuiso) September 2018

-> V1.1 23/08/2019 Change Log:
-Fixed bug. Using fullparms functions with "divs" no divider of 360 (200 for example) the thread could be incomplete. Now you can use any number of "divs" without problem.
-A small improvement. Now the diameter reductions at the beginning of the screw for easy entry are created with the same level of detail as the rest of the screw.

* Copyright 2018 ANDRES ROMAN (AKA Cuiso)
* Licensed under the Creative Commons - Attribution license.
* This software is free software, you can Share and Adapt under the terms of Attribution
(give appropriate credit).
*
* you can visit https://creativecommons.org/licenses/by/3.0/ for more details

* This software is distributed WITHOUT ANY WARRANTY.

*/

//For use this library you can put the file threads-library-by-cuiso-v1.scad in the same directory of your proyect and put the line use <threads-library-by-cuiso-v1.scad> in your own .scad file
//You can see examples of use in file examples.scad

/*
This is a library to include threads for screws and nuts in your own designs.

This library is focused to provide simple functions with preset parameters by default,
and not to be too demanding in CPU consumption neither in previsualizacion nor in rendering

This library has been tested printing on PLA with 0.1 layer. Except for smaller diameter
threads layers greater than 0.1 should work well.
Diamaters tested between 3mm and 10mm, but you can use any diameter of your choice.

Shape of the threads are similar (but not equal) to ISO METRIC threads.
Some tests have been done using screws and nuts printed with this library in
combination with screws and nuts of metal with acceptable results. However, they have
not been exhaustive tests.
*/

/*
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
AVAILABLE FUNCTIONS:

BASIC FUNCTIONS (USING PREDEFINED PARAMETERS):

thread_for_screw(diameter, length);
    Generates a screw thread of the diameter indicated by the "diameter" parameter and of the length indicated by "length". This function uses standard pitch values depending on the diameter specified.
    diameter: Free value, in milimeters.
    length: Free value, in milimeters.

    Example:
    thread_for_screw(diameter=10, length=30);

thread_for_nut(diameter, length, usrclearance=0);
    Generates a nut thread of the diameter indicated by the "diameter" parameter and of the length indicated by "length". This function uses standard pitch values depending on the diameter specified.
    The generated thread can be subtracted from any element of your design using the operator "difference()", thus obtaining a thread where a screw will fit.
    This function uses standard clearance for adjustment between screw and nut depending on the diameter specified.
    diameter: Free value, in milimeters.
    length: Free value, in milimeters.
    usrclearance: (optional) If the screw fits too tight on the nut you can specify a positive correction value (try 0.1 for example).
    If the screw fits too loose in the nut you can specify a negative correction value (try -0.1 for example).

    Example:
    thread_for_nut(diameter=10, length=20);

MORE AVAILABLE FUNCTIONS (WITH ADDITIONAL PARAMETERS):

thread_for_screw_fullparm(diameter, length, pitch, divs=50);
    Generates a screw thread of the diameter indicated by the "diameter" parameter and of the length indicated by "length", with pitch indicated by "pitch", and a resolution indicated by "divs".
    This function allows you to specify a non-standard "pitch" value.
    diameter: Free value, in milimeters.
    length: Free value, in milimeters.
    pitch: Pitch value.
    divs: (optional) you can obtain more or less resolution with parm. Higher values for more resolution (and more rendering time). Default value is 50.

    Example:
    thread_for_screw_fullparm(diameter=10, length=30, pitch=2, divs=60);

thread_for_nut_fullparm(diameter, length, usrclearance=0, pitch, divs=50, entry=1);
    Generates a nut thread with additional parameters:
    diameter: Free value, in milimeters.
    length: Free value, in milimeters.
    usrclearance: (optional) If the screw fits too tight on the nut you can specify a positive correction value (try 0.1 for example).
    If the screw fits too loose in the nut you can specify a negative correction value (try -0.1 for example).
    pitch: Pitch value.
    divs: (optional) you can obtain more or less resolution with parm. Higher values for more resolution (and more rendering time). Default value is 50.
    entry: By default, the nut threads include a wider entrance area at the beginning and end to facilitate the introduction of the screw and minimize "elephant foot" problems.
    Specify 1 in entry to use these zones and 0 to not use them.

    Example:
    thread_for_nut_fullparm(diameter=10,length=20,usrclearance=0.1,pitch=1.5,divs=60, entry=1);
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
*/

/*
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
SOME NOTES:
- At first preview(F5) of the design may appear in console a lot of messages:
"PolySet has nonplanar faces. Attempting alternate construction"
simply ignore those messages, they are not a problem.

- I have no lag problems in preview(F5) mode during the test of this library. If you are suffering lag problems in preview you can try to un-comment the "render()" al lines 254 and 261.

- This library uses by default PITCH values:
  DIAMETER    PITCH_VALUE
  3mm        0.5mm
  4mm        0.7mm
  5mm        0.8mm
  6mm        1.0mm
  8mm        1.25mm
 10mm        1.5mm
 ...
 24mm        3.0mm
 (complete list defined at get_std_pitch(diam))
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
*/

//EXAMPLE FOR CUSTOMIZER:
//1 to draw rod, 0 to not draw rod
drawrod=1;
//1 to draw nut, 0 to not draw nut
drawnut=1;
diameter=8;
lengthrod=15;
lengthnut=7;
//Example of USE, a rod SCREW:
if(drawrod==1)thread_for_screw(diameter=diameter, length=lengthrod);
//Example of USE, a FEMALE THREAD to be removed (with difference ()) from another figure:
if(drawnut==1)
translate([diameter,1.5*diameter,0]){
thread_for_nut(diameter=diameter, length=lengthnut);
}

//>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
module thread_for_screw(diameter, length)
{
stdpitch=get_std_pitch(diameter);
thread_for_screw_cuiso_tec(diameter,length,stdpitch,50);
echo(diameter);echo(stdpitch);
}

module thread_for_nut(diameter, length, usrclearance=0)
{
stdpitch=get_std_pitch(diameter);
stdclearance=get_std_clearance(diameter);

thread_for_nut_cuiso_tec
(diameter+stdclearance+usrclearance,length,stdpitch,50,entry=1);

echo(diameter);echo(stdpitch);echo(stdclearance+usrclearance);
}

//>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
module thread_for_screw_fullparm(diameter, length, pitch, divs=50)
{
if(divs<20) thread_for_screw_cuiso_tec(diameter,length,pitch,20);
    else if(divs>360) thread_for_screw_cuiso_tec(diameter,length,pitch,360);
        else thread_for_screw_cuiso_tec(diameter,length,pitch,divs);
}

module thread_for_nut_fullparm(diameter, length, usrclearance=0, pitch, divs=50, entry=1)
{
stdclearance=get_std_clearance(diameter);

if(divs<20)thread_for_nut_cuiso_tec
(diameter+stdclearance+usrclearance,length,pitch,20,entry=entry);
else
if(divs>360)thread_for_nut_cuiso_tec
(diameter+stdclearance+usrclearance,length,pitch,360,entry=entry);
else
thread_for_nut_cuiso_tec
(diameter+stdclearance+usrclearance,length,pitch,divs,entry=entry);
}

//>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
function get_std_pitch(diam) =
lookup(diam,[[3,0.5],[4,0.7],[5,0.8],[6,1.0],[8,1.25],[10,1.5],
[12,1.75],[14,2.0],[16,2.0],[18,2.5],[20,2.5],[22,2.5],[24,3.0]
]);

function get_std_clearance(diam) =
lookup(diam,[[3,0.4],[4,0.4],[5,0.5],[6,0.6],[8,0.6],[10,0.6],
[12,0.7],[14,0.7],[16,0.7],[18,0.7],[20,0.8],[22,0.8],[24,0.8]
]);
//>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
module thread_for_screw_cuiso_tec(diameter,lenght,pitch,divdelta){
delta=360/divdelta;
intersection(){
cubointter(long=lenght,pitch=pitch,diameter=diameter,divdeltacube=divdelta);
rosca(long=lenght,p=pitch,delta=delta,diameter=diameter);
}
//#cylinder(d=diameter,h=lenght,$fn=100);
}

module thread_for_nut_cuiso_tec(diameter,lenght,pitch,divdelta,entry){
delta=360/divdelta;
translate([0,0,-0.001])
intersection(){
rosca(long=lenght+0.002,p=pitch,delta=delta,diameter=diameter,nut=1);
cubointter_nut(lenght+0.002,pitch,diameter);
}
if(entry==1){translate([0,0,-0.001])cubointter_nut_entry(lenght+0.002,pitch,diameter,divdeltacube=divdelta);}
//#cylinder(d=diameter,h=lenght,$fn=100);
}

module cubointter(long,pitch,diameter,divdeltacube)
{
longcube=long-pitch;
translate([0,0,longcube/2+pitch/2])cube([diameter,diameter,longcube],center=true);
translate([0,0,longcube+pitch/2])
cylinder(d1=diameter,d2=diameter-2*pitch*0.866,h=pitch/2, $fn=divdeltacube);
cylinder(d2=diameter,d1=diameter-2*pitch*0.866,h=pitch/2, $fn=divdeltacube);
}

module cubointter_nut(long,pitch,diameter)
{
longcube=long;
translate([0,0,longcube/2])cube([diameter,diameter,longcube],center=true);
}

module cubointter_nut_entry(long,pitch,diameter,divdeltacube)
{
longcube=long-0.6;
translate([0,0,longcube])
cylinder(d2=diameter+0.4,d1=diameter,h=0.6, $fn=divdeltacube);
cylinder(d1=diameter+0.4,d2=diameter,h=0.6, $fn=divdeltacube);
}

module rosca(long,p,delta,diameter,nut=0)
{
vueltas=round(long/p+0.5)+1;
translate([0,0,-p/4])
for(v = [0 : 1 : vueltas-1])
translate([0,0,v*p])
vuelta(p=p,delta=delta,diameter=diameter,nut=nut);
}

module vuelta(p,delta,diameter,nut)
{
medio(p=p,delta=delta,diameter=diameter,nut=nut);

translate([0,0.001,0])
rotate([0,180,180])
medio(p=p,delta=delta,diameter=diameter,nut=nut);
}

module medio(p,delta,diameter,nut)
{
if(nut==1)
//render()
hull(){
for(k = [0 : delta : 180])
translate([0,0,k*p/360])rotate([0,0,k])pieza_nut(diameter=diameter, p=p);
translate([0,0,180*p/360])rotate([0,0,180])pieza_nut(diameter=diameter, p=p);
}
else
//render()
hull(){
for(k = [0 : delta : 180])
translate([0,0,k*p/360])rotate([0,0,k])pieza(diameter=diameter, p=p);
translate([0,0,180*p/360])rotate([0,0,180])pieza(diameter=diameter, p=p);
}
}

module pieza(diameter, p)
{
r=diameter/2;
h=p*0.866;
pp=p/2;
pm=-p/2;
hh=r-h;

polyhedron([
    [0,0,pp],[hh,0,pp],[r-h/8,0,p/16],[r-h/8,0,-p/16],[hh,0,pm],[0,0,pm]
    ],
    [[0,1,2,3,4,5]]);
}

module pieza_nut(diameter, p)
{
r=diameter/2;
h=p*0.866;
pp=p/2;
pm=-p/2;
hh=r-h;
polyhedron([[0,0,pp],[hh,0,pp],[r,0,0],[hh,0,pm],[0,0,pm]], [[0,1,2,3,4]]);
}
```


[User]
I need an OpenSCAD design for a GT2 timing pulley. I'd like it to be parametric, so I can easily adjust the number of teeth, the height, and the axle hole size. Also, I'd like to be able to add flanges to the top and/or bottom of the pulley, with configurable thickness. I've seen some designs that include a flat section on the axle bore, so that'd be useful to have as an option.

Here's what I'm looking for in terms of parameters:

*   `tooth`: The number of teeth on the pulley.
*   `height`: The overall height of the pulley body (not including flanges).
*   `axle_d`: The diameter of the axle hole.
*   `FlatAxle`: A value (divide by 10 to get mm) representing the 'depth' of the flat portion of the axle hole. A value of 0 would indicate no flat.
*   `BottomFlange`: A boolean (true/false) to include or omit the bottom flange.
*   `FlangeThickBottom`: Thickness of the bottom flange.
*   `TopFlange`: A boolean (true/false) to include or omit the top flange.
*    `FlangeThickTop`: Thickness of the top flange.

I'd prefer that the top flange be generated as a separate piece, so it can be printed separately and then glued on. The bottom flange should be integrated into the main pulley body. And please generate it so it is easy to modify later.  I don't think I need any special libraries beyond OpenSCAD primitives.  Please generate the scad file (or files, if necessary) for the pulley.

[Assistant]
GT2_Pulley.scad:
```
$fn=60+0;  // dont want this in customizer i think

tooth=20;        //  [12:200]  nr of teeth
height=6.6;      // height (add a bit of margin (i use 6.6 for 6mm belt))
axle_d=6;        // Diameter of the axle
FlatAxle=0;     //  value is divided by 10   >  0=not flat  10 = a flat 'depth' of 1mm

BottomFlange=true;  // if only a top  or bottom flange is needed use the bottom flange !
FlangeThickBottom=2;      // thickness of flange

TopFlange=true;     // seperately printed top flange (Glue it on!).
FlangeThickTop=2;      // thickness of flange

diam= tooth*2/PI;

// The cut out of one profile (a small trapezium)
module Profile(h=4)
{
    a=0.6;
    linear_extrude(height=h)polygon(points=[[0,-a],[0,a],[-1,a*3/4],[-1,-a*3/4]]);
}

// putting the axle in a separate module makes it easier to adapt
module Axle(d=6,height=5)
{
    translate([0,0,-0.1])
    difference()
    {
         cylinder(d=d,h=height+1);
         translate([(d/2)-FlatAxle/10,-15,0])cube([30,30,50]); // must be big enough
    }
}

module BaseShape(hh=6)
{
    // Base shape contains the tooth
    difference()
    {
       color("LightGreen")cylinder(d=diam,h=hh);

       for(i=[1:tooth])
       {
         rotate([0,0,360*i/tooth])translate([diam/2,0,-0.1])color("Red")Profile(h=hh+1);
       }
    }
    if (BottomFlange)
    {
       color("LightBlue")cylinder(d=diam+2,h=FlangeThickBottom);
    }
}

module Pulley()
{
     // Add the height of the bottom flange
     hh= (BottomFlange) ? height+FlangeThickBottom: height;

     // Cut out the axle from the base shape
     difference()
     {
         BaseShape(hh=hh);

         Axle(d=axle_d,height=hh);
     }

     // Top flange must be glued on top, easier to print like this
     if (TopFlange)
     {
         translate([diam+5,0,0])
         difference()
         {
            color("LightBlue")cylinder(d=diam+2,h=FlangeThickTop);
            Axle(d=axle_d,height=FlangeThickTop+1);
         }
     }

}

Pulley();

```


[User]
I need to generate some GT2 timing pulley models, and I'd like to be able to customize them with a few parameters. Could you create an OpenSCAD file (or files, if that makes it easier) that can do this?

Here's what I need to control:

*   **Number of teeth:** I need to be able to specify how many teeth the pulley should have.
*   **Pulley height/length:**  I need to be able to adjust the overall height of the pulley, which is the length along the axis of rotation.
*   **Axle diameter:** The diameter of the hole for the axle should be configurable.
*   **Flat axle:** I sometimes need a flat spot on the axle hole for a grub screw or to fit a D-shaped shaft. I'd like to be able to specify a depth for this flat section, with 0 meaning no flat and a positive value representing the depth of the flat.
*   **Bottom flange:**  I need to be able to include or exclude a bottom flange, and if included, set its thickness.
*  **Top flange:** I need a separate top flange, primarily for easy printing, with adjustable thickness that can be glued on. It should have the same axle hole and flat depth as the main body.
* I'd like to have it use the standard GT2 profile.

I'd like to avoid using libraries if it's not needed for this relatively simple task, but if you think that a library would make it significantly easier please use it.

Thanks!

[Assistant]
GT2_Pulley.scad:
```
$fn=60+0;  // dont want this in customizer i think

tooth=20;        //  nr of teeth
height=6.6;      // height (add a bit of margin (i use 6.6 for 6mm belt))
axle_d=6;        // Diameter of the axle
FlatAxle=10;     //  value is divided by 10  , 0=not flat  10 = a flat 'depth' of 1mm

BottomFlange=true;  // if only a top  or bottom flange is needed use the bottom flange !
FlangeThickBottom=2;      // thickness of flange

TopFlange=true;     // seperately printed top flange (Glue it on!).
FlangeThickTop=2;      // thickness of flange

diam= tooth*2/PI;

// The cut out of one profile (a small trapezium)
module Profile(h=4)
{
    a=0.6;
    linear_extrude(height=h)polygon(points=[[0,-a],[0,a],[-1,a*3/4],[-1,-a*3/4]]);
}

// putting the axle in a separate module makes it easier to adapt
module Axle(d=6,height=5)
{
    translate([0,0,-0.1])
    difference()
    {
         cylinder(d=d,h=height+1);
         translate([(d/2)-FlatAxle/10,-15,0])cube([30,30,50]); // must be big enough
    }
}

module BaseShape(hh=6)
{
    // Base shape contains the tooth
    difference()
    {
       color("LightGreen")cylinder(d=diam,h=hh);

       for(i=[1:tooth])
       {
         rotate([0,0,360*i/tooth])translate([diam/2,0,-0.1])color("Red")Profile(h=hh+1);
       }
    }
    if (BottomFlange)
    {
       color("LightBlue")cylinder(d=diam+2,h=FlangeThickBottom);
    }
}

module Pulley()
{
     // Add the height of the bottom flange
     hh= (BottomFlange) ? height+FlangeThickBottom: height;

     // Cut out the axle from the base shape
     difference()
     {
         BaseShape(hh=hh);

         Axle(d=axle_d,height=hh);
     }

     // Top flange must be glued on top, easier to print like this
     if (TopFlange)
     {
         translate([diam+5,0,0])
         difference()
         {
            color("LightBlue")cylinder(d=diam+2,h=FlangeThickTop);
            Axle(d=axle_d,height=FlangeThickTop+1);
         }
     }

}

Pulley();

```


[User]
Okay, I have this cool heart-shaped box design, and I'd like to make it parametric so I can easily adjust the size and clearances. I've already got a working design in OpenSCAD, but it's a bit hardcoded.  Here are the details:

It's a secret heart box that opens with a sort of sliding and rotating action. The box is made of four pieces: an upper left, a lower left, an upper right, and a lower right.  The upper and lower pieces are mirrored, and they connect via hinges. The box has a central parallel section with a length, a flat face width, and a total height. There's also some play in the box.

The opening is based on an angle of the cleave, and it incorporates a clasp mechanism that allows the pieces to latch together. There are some sliding nubs that need to move smoothly, and I need control over the clearance between these parts.  I need a couple of small hinges on each side to hold the halves together.

I want to be able to control the following parameters:

*   **`wallT`**: The wall thickness of the box.
*   **`tol`**: The tolerance (clearance) between moving parts.
*   **`L`**: The length of the parallel midsection.
*   **`W`**: The width of the flat face.
*   **`H`**: The overall height of the box.
*   **`x_hinge`**: The space between the hinges on each side.
*   **`nub`**: The depth of the sliding nubs.
*   **`quality`**: Control over render smoothness, but this does not need to be a functional parameter, as it only affects the rendering resolution.
*   **`cleaveAngle`**: The angle at which the box opens.
*   **`n`**: The number of zigzags on the inside of the heart shape (number of "rings").

I'm not using any special libraries for this, but I do have a design that already works as a basic template. I'd like the design to be in a single OpenSCAD file if possible. Could you generate the files for me, making sure to include all the parameters? Thanks!

[Assistant]
SecretHeart2_fixed.scad:
```
// All-at-once Secret Heart Box

assembly();
//animation();

//Wall Thickness
wallT=1.6;
//Tolerance between moving parts
tol=0.3;

//use <write/Write.scad>

//Length of parallel midsection
L=30+0;
//Width of flat face
W=25+0;
//Height of box
H=20+0;
//Space between hinges
x_hinge=16+0;
//Depth of sliding nubs
nub=2+0;
//Smoother renders slower
quality=4+0;//[1:Draft,2:Medium,4:Fine]
//Angle of opening (deg)
cleaveAngle=40+0;
//Number of zigzags
n=1+0;

T=wallT/2;
$fa=12/quality;
$fs=2/quality;
phi=atan(W/L);// heart angle
R=H/2-2*nub;// clasp radius
R1=H/2-2*nub;// cleave radius
t1=1-2*abs($t-0.5);// makes time loop back and forth

module animation(){
phi= t1<0.5 ? 0 : (t1-0.5)*2*90;
psi= t1<0.5 ? (t1-0.5)*2*180 : 0;
	LowerLeft();
	translate([0,R1/cos(cleaveAngle)+H/2+nub/2,-H/2+nub])rotate([-phi,0,0])
		translate(-[0,R1/cos(cleaveAngle)+H/2+nub/2,-H/2+nub])UpperLeft();
	rotate([psi,0,0]){
		translate([0,R1/cos(cleaveAngle)+H/2+nub/2,-H/2+nub])rotate([-phi,0,0])
			translate(-[0,R1/cos(cleaveAngle)+H/2+nub/2,-H/2+nub])UpperRight();
		LowerRight();
	}
}

module assembly()
translate([0,0,H/2]){
	LowerLeft();
	UpperLeft();
	LowerRight();
	UpperRight();
}

module UpperLeft()
difference(){
    cleave(lower=false)Left();
    translate([-3/2*tol-nub-T,0,0])hingeGap();
    translate([-x_hinge,0,0])mirror([1,0,0])hingeGap();
}

module LowerLeft() {
    cleave(lower=true)Left();
    difference(){
        clasp(inside=1);
        translate([-tol/2,0,-R+T+nub+2*tol])rotate([0,-25,0])translate([0,0,-H])cube(2*H,center=true);
    }
    translate([-3/2*tol-nub-T,0,0])hinge();
    translate([-x_hinge,0,0])mirror([1,0,0])hinge();
    brace();
}

module UpperRight()
difference(){
    cleave(lower=false)Right();
    translate([3/2*tol+nub+T,0,0])mirror([1,0,0])hingeGap();
    translate([x_hinge,0,0])hingeGap();
    clasp(inside=0);
}

module LowerRight()
difference(){
	union(){
		cleave(lower=true)Right();
		translate([nub+T,0,2*T-H/2])translate([6,5,0])scale(0.8)monogram(h=1);
		translate([3/2*tol+nub+T,0,0])mirror([1,0,0])hinge();
		translate([x_hinge,0,0])hinge();
		mirror([1,0,0])brace();
	}
	translate([nub+T+tol/2,0,0])rotate([0,90,0])cylinder(r=R,h=tol);
	clasp(inside=0);
}

module letter(word);
//translate([0,.2*fontsize,0])write(word,t=1,h=fontsize,center=true,font="../write/BlackRose.dxf");

//module letter1()
//scale(14/15)render()
//union(){
//    letter("A");
//    letter("B");
//    letter("C");
//    letter("D");
//    letter("E");
//    letter("F");
//    letter("G");
//    letter("H");
//    letter("I");
//    letter("J");
//    letter("K");
//    letter("L");
//    letter("M");
//    letter("N");
//    letter("O");
//    letter("P");
//    letter("Q");
//    letter("R");
//    letter("S");
//    letter("T");
//    letter("U");
//    letter("V");
//    letter("W");
//    letter("X");
//    letter("Y");
//    letter("Z");
//}

module brace()
intersection(){
	rotate([cleaveAngle,0,0])translate([0,R1,0])difference(){
		cylinder(r=nub+2*T+tol*3/2,h=3*H,center=true);
		translate([L-nub-T,0,0])cube(2*L,center=true);
		translate([L-nub-T-tol*3/2,L,0])cube(2*L,center=true);
	}
	difference(){
		translate([0,0,0])cube([L,2*(R1*sqrt(2)+H/2+nub),H-T],center=true);
		difference(){
			translate([0,0,L+H/2-3*T])cube(2*L,center=true);
			rotate([cleaveAngle-90,0,0])cube([2*L,2*L,2*R1],center=true);
		}
	}
}

module cleave(lower=true){
y = lower==true ? L+R1 : -L+R1+tol;
difference(){
	children(0);
	rotate([cleaveAngle,0,0])translate([0,y,0])cube(2*L,center=true);
}
}

module Right()
difference(){
	union(){
		mirror([1,0,0])hollowbase();
        intersection(){
            cube([L+W,L+W,H],center=true);
            for(i=[0:n-1])rotate([0,-90,0])ring(H/2+(4*i+1)*nub);
        }
        intersection(){
            rotate([0,-90,0])ring(R=H/2-nub);
            rotate([cleaveAngle,0,0])translate([-H/2,H/2-2*nub+tol/2,-H-tol/2])cube(H);
        }
	}
    difference(){
        rotate([0,-90,0])ring(R=H/2-nub);
        rotate([cleaveAngle,0,0])translate([0,2*nub,-H/2-tol/2])cube([3*nub,H,H],center=true);
    }
    for(i=[0:n-1])rotate([0,-90,0])ring(H/2+(4*i+3)*nub);
}

module Left()
difference(){
	union(){
		hollowbase();
        intersection(){
            cube([L+W,L+W,H],center=true);
            for(i=[0:n-1])rotate([0,90,0])ring(H/2+(4*i+3)*nub);
        }
        intersection(){
            rotate([0,90,0])ring(R=H/2-nub);
            rotate([cleaveAngle,0,0])translate([-H/2,H/2-2*nub+tol/2,tol/2])cube(H);
        }
	}
	difference(){
        rotate([0,90,0])ring(R=H/2-nub);
        rotate([cleaveAngle,0,0])translate([0,2*nub,H/2+tol/2])cube([3*nub,H,H],center=true);
    }
    for(i=[0:n-1])rotate([0,90,0])ring(H/2+(4*i+1)*nub);
}

module clasp(inside=0)
rotate([0,90,0])translate([0,0,tol/2+.01])union(){
	translate([0,0,T-nub])cylinder(r1=R-2*nub-tol*inside,r2=R-tol*inside,h=2*nub+.02);
    //cylinder(r=R-2*T-tol*inside,h=2*(nub+T),center=true);
}

module ring(R)
rotate_extrude()translate([R,-tol/2])rotate(45)square(nub*sqrt(2),center=true);

module hollowbase()
difference(){
	base(inside=0);
	difference(){
		base(inside=1);
		translate([-nub-T,0,0])hinge();
		translate([-L-x_hinge,R1/cos(cleaveAngle)+H/2,-H/2])cube([L,2*nub,nub]);
		translate([-L-x_hinge,R1/cos(cleaveAngle)+H/2+nub/2,-H/2+nub])
			rotate([0,90,0])cylinder(r=nub,h=L);
	}
}

module hinge()
translate([-nub/2,R1/cos(cleaveAngle)+H/2-nub/2,-H/2+nub])
difference(){
	union(){
		translate([0,-2*nub,0])cube([nub,6*nub,2*nub],center=true);
		translate([0,nub,0])rotate([0,90,0])cylinder(r=nub,h=nub,center=true);
		translate([nub/2-.01,nub,0])rotate([0,90,0])cylinder(r1=nub,r2=0,h=nub);
	}
	translate([0,-6*nub,2*nub])rotate([45,0,0])cube(6*nub,center=true);
}

module hingeGap()
translate([-nub/2,R1/cos(cleaveAngle)+H/2-nub/2,-H/2+nub]) {
	translate([0,tol-nub,0])cube([nub+2*tol,6*nub,2*nub+2*tol],center=true);
	translate([nub/2+tol-.01,nub,0])rotate([0,90,0])cylinder(r1=nub,r2=0,h=nub);
}

module base(inside=0){
W=W-4*T*inside;
intersection(){
	rotate([0,0,90+phi])union(){
		cube([L,W,2*H],center=true);
		translate([L/2,0,0])rotate([0,0,90])cylinder(r=W/2,h=2*H,center=true);
		translate([0,W/2-H/2,0])rotate([0,90,0])rotate([0,0,90])cylinder(r=H/sqrt(2),h=L,center=true);
		for(i=[-1,1])translate([i*L/2,0,0])rotate([0,0,90])
			rotate_extrude(convexity=2)difference(){
				translate([W/2-H/2,0])circle(r=H/sqrt(2));
				translate([-H,0])square(2*H,center=true);
			}
	}
	translate([-L-(nub+T)*inside-tol/2,0,0])cube([2*L,2*L,H-4*T*inside],center=true);
}
}

module monogram(h=1)
linear_extrude(height=h,center=true)
translate(-[3,2.5])union(){
	difference(){
		square([4,5]);
		translate([1,1])square([2,3]);
	}
	square([6,1]);
	translate([0,2])square([2,1]);
}
```


[User]
I need to design some replacement parts for a welding helmet's suspension system. The original parts are broken, and I want to create a robust, parametric design that I can customize and print. I've got three parts in mind: a retention pin, a flange bushing, and a knob.

The retention pin is the most crucial; it's like a screw-pin that holds the suspension band to the helmet. I want it to have a central, rounded section with a slit on one side. The side with the slit needs to be configurable so it can be either left or right. It needs a hole for a main screw, and a perpendicular hole for a set screw. There needs to be a pivot base with a round section that increases in diameter towards the middle and then tapers. The main screw will pass through the center of the pivot. I'm picturing it as mostly a cylinder, but with some cutouts for functionality. The pin needs to be able to be made for left or right helmet sides.

The flange bushing is the second part, which I want to have a round bushing shape with a flange on top. It needs a screw hole going through the middle, and a couple of stepped sections for other parts to sit in. It also needs small tabs on the edges for mounting. On the bottom side of the flange, there should be angled holes cut around the perimeter to allow for adjustability when it comes to mounting. These should be created as a hull of 2 cylinder cuts.

Finally, I need a knob that fits onto the screw of the retention pin. This knob should have a rounded, comfortable shape with some grip cutouts around the edge. It needs a hole for the screw, and it also needs an option to include a hexagonal nut trap, in case the screw doesn't hold well with just friction in the plastic.

I'd really like to have all of these designs be controlled by parameters, specifically for tolerances, screw diameters, and even nut width, so I can adjust them. Please generate the appropriate OpenSCAD files for these three parts. I am using version 2021.01 or later. I don't need any libraries that don't come standard with OpenSCAD.

Here are the specific dimensions I need, in millimeters:

**Retention Pin**
*   `side`: string, "left" or "right"
*   `screw_diameter`: float, size of screw hole, outer diameter if set-screw used, inner diameter if using nut
*   `set_screw_diameter`: float, inner diameter of set-screw hole
*   `tolerance`: float, added to all specified dimensions for fit
*   `res`: integer, segments for curves (e.g., 64 for a smooth circle)

**Flange Bushing**
*   `screw_diameter`: float, diameter of screw hole for smooth insertion
*   `tolerance`: float, tolerance added to dimensions
*   `res`: integer, segments for curves

**Knob**
*   `use_nut`: boolean, true to include a nut trap, false to assume press-fit for screw
*   `screw_diameter`: float, inner if not using a nut, outer if using a nut
*   `nut_width`: float, width of nut if using
*   `tolerance`: float, added to dimensions for fit
*   `res`: integer, segments for curves

I'm aiming for a design that is both functional and easy to print with common 3D printing materials. Thanks!

[Assistant]
retention_pin.scad:
```
/* [Options] */
// Which side to generate
side = "left"; // ["left","right"]

/* [Dimensions] */
// Size of screw hole (outer diameter if using set-screw, inner diameter if no set-screw and knob has nut)
screw_diameter = 2.8;
// Size of set-screw hole (inner diameter)
set_screw_diameter = 2.8;

/* [Quality] */
// Tolerance (added to specified dimensions)
tolerance = 0.1;
// Base segments for cylinders
res = 64;

/* [Hidden] */
nothing = 0.01;

difference() {
    union() {
        // center and rounded side
        difference() {
            translate([0, 0, -1])
                cylinder(r=22/2, h=5.5, $fn=res);
            translate([0, -5-19/2, 0])
                cube([100, 10, 10], center=true);
            translate([0, 5+19/2, 0])
                cube([100, 10, 10], center=true);
        }

        // side and slit
        difference() {
            translate([-5, -19/2, -1])
                cube([23, 19, 5.5]);
            if (side == "right") {
                translate([13.8-1, -30, 1.7])
                    cube([2.5, 60, 10]);
            }
            if (side == "left") {
                translate([13.8-1.5-1.3, -30, 1.7])
                    cube([2.5, 60, 10]);
            }
        }

        // pivot base
        difference() {
            union() {
                cylinder(r=14.2/2, h=10.6, $fn=res);
                translate([0, 0, 4.5])
                    cylinder(r1=17.5/2, r2=14.2/2, h=2, $fn=res);
            }
            translate([0, 0, 5.5])
                cylinder(r=11/2, h=10, $fn=res);
        }
    }

    // screw hole
    translate([0, 0, -10])
        cylinder(r=screw_diameter/2+tolerance, h=30, $fn=res/4);

    // set-screw hole
    translate([0, 0, 2])
    rotate([90, 0, 0])
        cylinder(r=set_screw_diameter/2+tolerance, h=30, center=true, $fn=res/4);
}

difference() {
    translate([0, 0, 10.6])
        cylinder(r=14.2/2, h=4.2, $fn=res);
    cylinder(r=11/2, h=20, $fn=res);
    if (side == "right") {
        rotate([0, 0, -30])
        translate([0, 10, 0])
            cube([20, 20, 50], center=true);
    }
    if (side == "left") {
        rotate([0, 0, 180+30])
        translate([0, 10, 0])
            cube([20, 20, 50], center=true);
    }
}

```
flange_bushing.scad:
```
/* [Dimensions] */
// Size of screw hole (outer diameter/should allow smooth insertion)
screw_diameter = 4;

/* [Quality] */
// Tolerance (added to specified dimensions)
tolerance = 0.1;
// Base segments for cylinders
res = 64;

/* [Hidden] */
nothing = 0.01;

difference() {
    union() {
        cylinder(r=20/2+tolerance, h=11.3, $fn=res);
        cylinder(r=8.4/2, h=12.3, $fn=res);
    }
    difference() {
        translate([0, 0, 1.5])
            cylinder(r=14.6/2+tolerance, h=10, $fn=res);
        cylinder(r=8.4/2, h=13.3, $fn=res);
    }

    // hole for screw
    translate([0, 0, -nothing])
        cylinder(r=screw_diameter/2+tolerance, h=20, $fn=res/4);
}

translate([6, 0, 6.5/2])
    cube([6, 5, 6.5], center=true);

difference() {
    translate([0, 0, 0])
        cylinder(r=74/2, h=2, $fn=res*2);

    // remove base area interference
    translate([0, 0, -10])
        cylinder(r=14.6/2, h=30, $fn=res);

    // cut flange
    rotate([0, 0, -28])
    translate([0, -100/2-3, 0])
        cube([100, 100, 10], center=true);
    rotate([0, 0, 28])
    translate([0, 100/2+3, 0])
        cube([100, 100, 10], center=true);

    // clip corners
    translate([0, 100/2+18, 0])
        cube([100, 100, 10], center=true);
    translate([0, -100/2-18, 0])
        cube([100, 100, 10], center=true);

    // angle set holes
    for (i=[0:5]) {
        rotate([0, 0, -25+(10*i)])
            hull() {
                translate([30.8, 0, -nothing])
                    cylinder(r=3.5/2, h=10, $fn=res/4);
                translate([32.8, 0, -nothing])
                    cylinder(r=3.5/2, h=10, $fn=res/4);
            }
    }
}
```
knob.scad:
```
/* [Options] */
// Use inserted nut instead of plastic to hold screw
use_nut = true;

/* [Dimensions] */
// Size of screw hole (inner diameter if 'use_nut' is False, outer diameter if 'use_nut' is True)
screw_diameter = 4;
// Width of nut if 'use_nut' is True
nut_width = 8;

/* [Quality] */
// Tolerance (added to specified dimensions)
tolerance = 0.1;
// Base segments for cylinders
res = 64;

/* [Hidden] */
nothing = 0.01;

difference() {
    union() {
        cylinder(r1=29/2, r2=30/2, h=0.5, $fn=res);
        translate([0, 0, 0.5])
            cylinder(r=30/2, h=1.5, $fn=res);
        translate([0, 0, 4])
            cylinder(r=14/2, h=8, $fn=res/2);
        difference() {
            translate([0, 0, 4])
                cylinder(r=22/2, h=7.5, $fn=res/2);
            for (i=[0:2]) {
                rotate([0, 0, (360/3)*i])
                translate([13, 0, 0])
                    cylinder(r=12, h=20, $fn=6);
            }
        }
        difference() {
            translate([0, 0, 2])
                cylinder(r1=29.3/2, r2=28/2, h=9.5, $fn=res);

            // center cutout and dome
            difference() {
                translate([0, 0, 6])
                    cylinder(r=21/2, h=8, $fn=res);
                translate([0, 0, 6])
                scale([1, 1, 0.25])
                    sphere(r=19/2, $fn=res);
            }

            // grip cutouts
            for (i=[0:9]) {
                rotate([0, 0, (360/10)*i])
                translate([17, 0, 3])
                    cylinder(r=8/2, h=10, $fn=res/2);
                rotate([0, 0, (360/10)*i])
                translate([17, 0, 3])
                scale([1, 1, 0.3])
                    sphere(r=8/2, $fn=res/2);
            }
        }
    }

    if (use_nut) {
        // nut trap
        translate([0, 0, 3])
            cylinder(r=(nut_width/2+tolerance)/sin(60), h=20, $fn=6);
    }

    // screw hole
    translate([0, 0, -nothing])
        cylinder(r=screw_diameter/2+tolerance, h=20, $fn=res/4);

    // inset for screw (make it easier to get in)
    translate([0, 0, -nothing])
        cylinder(r1=3.2, r2=3.2/2, h=3, $fn=res/2);
}

```


[User]
I need an OpenSCAD design for a gun holster meant to be mounted on the side of an arcade cabinet. The holster should securely hold a toy gun, and should be easily adjustable to fit different cabinet board thicknesses.

The holster should have a curved, cradle-like shape to hold the gun. I envision a design that uses a combination of cylinders to form this cradle, and these cylinders should have an adjustable diameter based on the diameter of the gun itself. The design should also include a supporting structure that extends back to the arcade cabinet, and this structure should be adaptable to various cabinet board thicknesses.

For the mounting, I’d like to have two options: either an overhang that clips onto the cabinet edge, or screw holes for a more secure attachment. The overhang should have a variable amount of "bite" based on the cabinet board thickness. The screw option should include countersunk screw holes.

Finally, I want to include a knob on the side for aesthetic reasons, and this knob should have a textured surface for easy grip.

Could you please generate an OpenSCAD file, or multiple files as needed, with parameters for:

*   `board_thickness`: The thickness of the arcade cabinet board.
*   `gun_diameter`: The diameter of the toy gun barrel.
*   `holster_depth`: The depth of the cradle for the gun.
*   `mount_type`: Either "overhang" or "screws" as described above.
*  `knob_radius`: Radius of the knob.
*  `knob_height`: Height of the knob.
* `screw_diameter`: Diameter of the screws.
* `screw_head_diameter`: Diameter of the screw head.
* `screw_head_height`: Thickness of the screw head.
* `screw_depth`: Length of the screw hole.

I think this should be doable with just the standard OpenSCAD primitives, but if you need any libraries to make it better, feel free.

[Assistant]
arcade_gun_holster.scad:
```
board_thickness = 18;
$fn = 60;

// How to attach the holster
type="overhang"; // [overhang,screws]

module holster(thickness) {
    radius = 20;
    hull() {
        translate([radius/2, 0, radius/2]) rotate([-90, 0, 0]) cylinder(d=radius-thickness, h=60+thickness);
        translate([40+12-radius/2, 0, radius/2]) rotate([-90, 0, 0]) cylinder(d=radius-thickness, h=60+thickness);
        translate([radius/2, 0, 90+8+5-radius/2]) rotate([-90, 0, 0]) cylinder(d=radius-thickness, h=60+thickness);
        translate([40+12-radius/2, 0, 90+8+5-radius/2]) rotate([-90, 0, 0]) cylinder(d=radius-thickness, h=60+thickness);
    }
}

 module knob() {
     translate([0, 0, -108]) {
        difference() {
            union() {
                rotate([0, 90, 0]) cylinder(d=40, h=60);
                minkowski() {
                    translate([55, 0, 0]) rotate([0, 90, 0]) cylinder(d=50, h=1);
                    sphere(d=8);
                }
            }
            translate([55.5,0,0]) rotate([60,0,0]) translate([0,10,-18]) cylinder(d=5, h=10, center=true);
            translate([55.5,0,0]) rotate([60,0,0]) translate([0,-10,-18]) cylinder(d=5, h=10, center=true);
        }
    }
 }

 module screw() {
    translate([board_thickness,0,0]) rotate([0,90,0]) cylinder(d=4,h=20);
    translate([board_thickness+4,0,0]) rotate([0,90,0]) cylinder(d1=4,d2=20,h=5);
 }

 offs = 4;
 module holder() {
    translate([0,0,65+10-offs]) rotate([30-90,0,0]) difference() {
        union() {

            translate([-board_thickness-2, -60, 0]) difference() {
                cube([board_thickness+6, 1000, 12]);
                translate([2, -1, -1]) cube([board_thickness, 1200, 10]);
                if(type=="screws") {
                    translate([2-20, -1, -1]) cube([board_thickness+20, 1200, 50]);
                }
            }

            hull() {
                translate([0, -60, 0]) translate([0, 0, 0]) cube([4, 1000, 12]);
                translate([0, -60, 0]) translate([0, 44, -120]) cube([4, 1000, 120]);
            }

            knob();

            translate([0, -20, -60]) rotate([-30, 0, 0]) difference() {
                holster(0);
                holster(8);
            }
        }

        if(type=="screws") {
            translate([-board_thickness-2, -60, 0]) {
                translate([0,15,0]) rotate([90,0,0]) screw();
                translate([0,40,0]) rotate([90,0,0]) screw();
                translate([0,65,0]) rotate([90,0,0]) screw();
            }
        }
    }
}

module cutout() {
    translate([0,0,-5000])  cube([1000, 1000, 10000], center=true);
}

difference() {
    holder();
    cutout();
}

translate([0,-100,0]) rotate([180,0,0]) translate([100,0,0]) intersection() {
    translate([0,0,65+10-offs]) rotate([30-90,0,0]) knob();
    cutout();
}

translate([100,-50,0]) {
    cylinder(d=5-0.3, h=9.5);
    translate([10,0,0]) cylinder(d=5-0.3, h=9.5);
}
```