[User]
Hi! I'm looking for help designing a customizable wall hanger for my fitness bands and yoga straps. I want to be able to mount it on the wall and keep all that stuff off the floor.

Ideally, the design would have a horizontal bar with posts sticking out for hanging the bands. I'd like to be able to customize the text on the front of the bar, as well as the number of posts.  I'd also need some screw holes for mounting it.

Here's a breakdown of what I'm hoping for, and some initial parameters I was thinking:

**Core Elements:**

*   **Text:** Customizable text on the front, with adjustable size, thickness, and font (ideally using the `text()` module).  I'd like to be able to adjust horizontal offset too.
*   **Bar:** The main horizontal bar, with adjustable length, thickness, and height.
*   **Posts:**  Cylindrical posts sticking out from the bar, with adjustable diameter, length, and number of posts. Maybe with a spherical (or faceted) head on the end of each post.
*   **Mounting:** Screw holes with recesses for the screw heads.
*   **Optional Split:** The design should also have an option to split the main bar into two pieces, with a connector pin. This would make it easier to print a larger version.
*   **Hole Plugs:** Small plugs to cover the mounting screw holes.

**Initial Parameters (as a starting point - I'd want all of these adjustable):**

*   `text_string` = "YOGA"
*   `text_size` = 39
*   `text_thickness` = 10
*   `text_font` = "Nimbus Sans L:Bold"
*   `text_x_offset_adjust` = -1.5
*   `bar_length` = 230
*   `bar_thickness` = 12
*   `bar_height` = 14
*   `post_count` = 6
*   `post_diameter` = 10
*   `post_length` = 30
*   `post_head_diameter` = 12
*   `post_head_facets` = 12
*   `screw_diameter` = 3.5
*    `screw_recess_diameter` = 9
*   `split_position` = 113  (or 0 for no split)
*   `joiner_length` = 20
*   `joiner_looseness` = 0.97

**Modules:**

I would like the code to be well-modularized. Here are some modules I think would be useful:

*   `sign()`: Generates the text, the bar and posts.
*   `mount_holes()`: Creates the mounting holes with recesses.
*   `hole_plugs()`: Creates plugs for the mounting holes.
*   `joiner()`: Creates the connector pin for the split version.
*   `whole_sign()`: Combines the `sign()` and `mount_holes()`, with a difference to cut out the holes.

For the main module, I think it will need to check if `split_position` is zero, and if it isn't, create the two halves and the `joiner()`.

I'm picturing that the split version of the design would have two halves with the joiner pin in the middle. If no split, the whole thing is one piece.

I'd like this designed to be parametric so I can easily adjust all these values, and should be able to print it (both split and unsplit).

I'm not sure if any libraries would be useful here, but if so, please let me know. I don't want to overcomplicate it if not needed. Let me know if you have any questions! Thanks!

[Assistant]
fitness-band-hanger.scad:
```
// Fitness Band Hanger
// by Mark Thompson

text_string = "YOGA";
text_size = 39;
text_thickness = 10;
text_font = "Nimbus Sans L:Bold";
text_x_offset_adjust = -1.5;

bar_length = 230;
bar_thickness = 12;
bar_height = 14;

post_count = 6;
post_diameter = 10;
post_length = 30;
post_head_diameter = 12;
post_head_facets = 12;

screw_diameter = 3.5;
screw_recess_diameter = 9;

split_position = 113;       // set to 0 for no split
half_b_length = bar_length - split_position;
half_a_length = bar_length - half_b_length;
joiner_length = 20;
joiner_looseness = 0.97;    // scale of joiner bar vs hole that it fits in

max_z = bar_thickness + post_length + post_head_diameter;
max_y = bar_height + text_size;

$fn = 36;

module sign() {
    translate([text_x_offset_adjust,0,0])
        linear_extrude(height=text_thickness, convexity=4)
            text(text_string,size=text_size,font=text_font,halign="center",$fn=90);

    translate([0,-bar_height/2,bar_thickness/2])
        cube([bar_length,bar_height,bar_thickness],true);

    for (i=[0:post_count-1]) {
        translate([(i+0.5)*bar_length/post_count-bar_length/2,-bar_height/2,bar_thickness+post_length/2]) {
            cylinder(post_length,post_diameter/2,post_diameter/2,true);
            translate([0,0,post_length/2])
                sphere(post_head_diameter/2,$fn=post_head_facets);
        }
    }
}

module mount_holes() {
    for (i=[-1:2:1]) {
        translate([i*(bar_length/2-(bar_length/post_count)),-bar_height/2,bar_thickness/2]) {
            cylinder(bar_thickness+0.1,screw_diameter/2,screw_diameter/2,true);
            translate([0,0,bar_thickness/4])
                cylinder(bar_thickness/2+0.1,screw_recess_diameter/2,screw_recess_diameter/2,true);
        }
    }
}

module hole_plugs() {
    for (i=[-1:2:1]) {
        translate([i*(bar_length/2-(bar_length/post_count)),-bar_height*2,bar_thickness/2.5/2])
        cylinder(bar_thickness/2.5,screw_recess_diameter/2*1.01,screw_recess_diameter/2*0.93,true);
    }
}

module joiner() {
    translate([-bar_length/2+half_a_length,-bar_height*2,bar_thickness/4])
        cube([joiner_length,bar_height/2,bar_thickness/2],true);
}

module whole_sign() {
    difference() {
        sign();
        mount_holes();
    }

    hole_plugs();
}

{
    if (split_position) {
        translate([-5,0,0])
        difference() {
            intersection() {
                whole_sign();
                translate([-bar_length/2+half_a_length/2,0,max_z/2])
                    cube([half_a_length,max_y*2,max_z*2],true);
            }
            translate([-bar_length/2+half_a_length-joiner_length/4,-bar_height/2,bar_thickness/2])
                cube([joiner_length/2+0.1,bar_height/2,bar_thickness/2],true);
        }
        translate([5,0,0])
        difference() {
            intersection() {
                whole_sign();
                translate([bar_length/2-half_b_length/2,0,max_z/2])
                    cube([half_b_length,max_y*2,max_z*2],true);
            }
            translate([bar_length/2-half_b_length+joiner_length/4,-bar_height/2,bar_thickness/2])
                cube([joiner_length/2+0.1,bar_height/2,bar_thickness/2],true);
        }
        scale(joiner_looseness)
            joiner();
    } else {
        whole_sign();
    }
}
```


[User]
Hey there! I'm looking to get a custom OpenSCAD design made for ear stretching plugs and tunnels. I've been using a really basic script but it's limited, and I think you could make something much more useful.

Basically, I need a model that can create either a single-flange plug or tunnel for ear stretching. I'd like to be able to control a few key parameters:

*   **Diameter:** The diameter of the wearable area, I mean, the part that's going through the lobe. This will go from 1mm up to maybe 200mm, and it would be great to be able to adjust this in 0.1mm increments.
*   **Tunnel/Plug Toggle:**  A simple switch to choose whether it's a solid plug or a hollow tunnel.
*   **Flange Height:**  How tall the flange (the part that sticks out at the front) is. This should be adjustable from 0 up to 5mm.
*   **Flange Width:**  How wide the flange is. Should also be adjustable, from 0 to 5mm.
*   **Width (Wearable Area):** The length of the cylinder that goes through the lobe itself. I'd want to adjust this between 5 and 20mm to handle different lobe sizes.
*   **Thickness (Tunnel Only):** If it’s a tunnel, I need to control the thickness of the wall. This should go from 1mm up to 20mm.

I'm currently just using a simple cylinder difference operation to make these, and it's pretty barebones. Ideally, I'd like the model to be smooth and clean. I've also seen some designs use a rounded edge on the wearable edge and the flange, that would also be cool.

It would also be great if the model could easily be expanded to have a double flange in the future too!

Do you think you can help me build this? I'm not using any libraries or anything yet, but if there are some that make this sort of thing easier, I'd be happy to use them.

[Assistant]
TunnelSingleFlange.scad:
```
/* [Size of tunnel/plug] */
// Diameter of worn area
diameter = 25; // [1:0.1:200]
// Hole?
tunnel = true; // [true,false]

/* [Measurements of tunnel] */
// Height of flange
flange_height = 2; // [0:0.1:5]
// Width of flange
flange_width = 2; // [0:0.1:5]
// Width of worn area
width = 12; // [5:0.1:20]
//Thickness of worn area (only if tunnel)
thickness = 2.5; // [1:0.1:20]

tunnel_single_flange();

module tunnel_single_flange (){
	difference(){
        union(){
            cylinder(r=diameter/2+flange_height,h=flange_width, $fn=100);
			translate([0,0,flange_width])
			cylinder(r=diameter/2,h=width, $fn=100);
		}
        if (tunnel) {
            translate([0,0,-1])
            cylinder(r=(diameter/2)-thickness,h=width+(flange_width+2), $fn=100);
        }
	}
}
```


[User]
I'm looking for an OpenSCAD design for a jar gasket, specifically for those glass jars with the wire clamp and hinge. It needs to be parametric so I can adjust it for different sized jars.

The basic shape is a ring, and I'd like parameters for the outer diameter, inner diameter, and thickness of the ring. I also want the option to include a "grab tab" - a small cylindrical nub sticking out from the side, to make it easier to remove the gasket.

I'll be printing it in a flexible filament like TPU, so I need to account for shrinkage. It would be great if I could set a percentage for shrinkage that the design would automatically compensate for. And maybe a small fudge factor to make sure it's a tiny bit wider than the ideal inner diameter would help with fit.

So, in summary, I'd like:

*   **Parametric ring design** for a jar gasket
*   **Adjustable outer diameter, inner diameter, and thickness**
*   **Optional "grab tab"**
*   **Shrinkage compensation** using a percentage value
*   **Small adjustable fudge factor** to slightly increase the inner diameter
*   Please generate all code using only OpenSCAD built-in modules, I don't need any external libraries for this.

Thanks!

[Assistant]
Jar_Ring.scad:
```
/* [Size Adjustments] */
outerDiameter=92;
innerDiameter=78.9;
thickness=1.7;
grabTab=true;

/* [Hidden] */
shrinkPCT=.2; //%, PLA
fudge=.02;  //mm
shrinkFactor=1+shrinkPCT/100;

$fn=200;

outerDiam=outerDiameter*shrinkFactor;
innerDiam=innerDiameter*shrinkFactor;

difference()
  {
  cylinder(r=outerDiam/2, h=thickness);
  cylinder(r=innerDiam/2, h=thickness+fudge);
  }

if (grabTab)
  translate([-outerDiam/2,0,0])
    cylinder(d=outerDiam-innerDiam, h=thickness);

```


[User]
Hey, I need some help designing a bayonet-style ring system in OpenSCAD. I'm looking for a parametric design that includes both a body ring and a cover ring.

Here are the key parameters I need to control:

*   **Bore Diameter (inner diameter):** This should be adjustable, and I also need a tolerance value that can be added to it to adjust for printing accuracy. I'd like to specify the nominal bore diameter and the tolerance separately.
*   **Wall Thickness:** The thickness of the walls for both the body and cover rings should be adjustable.
*   **Part Gap:** There needs to be a small gap between the body ring and the cover ring, also adjustable.
*   **Thread Depth/Height:**  The thread/bayonet geometry needs to be configurable for both the depth/width of the "teeth" as well as their overall height/length.
*   **Part Selection:** The design should allow me to generate either the body ring or the cover ring, or neither (if I'm just using it as a library) using a simple parameter.
*   **Smoothness:** I'd like a parameter to control the facet resolution of the rendered circles and curves.

Basically, the design should work like this: The body ring has internal bayonet teeth, and the cover ring has external teeth that match up with the internal ones. The two rings should interlock and should be controlled by the given parameters. I'd like the code to also use some comments and echo statements where appropriate to improve readability and debugging.

I'm not using any external libraries in my work, so please make sure it's all done within a single file for now, or multiple files if needed.

Could you help me create an OpenSCAD file (or files) for this? Thanks!

[Assistant]
UBayonetRing.scad:
```
//// File: Bayonet.scad
//// Version: OpenSCAD 2015.03-2
//// Author: Kijja Chaovanakij
//// Date: 2020.10.14

//Sample library for the body
//thread(body_id=18, wall=2, gap=0.25, body=1);
//Sample library for the cover
//thread(body_id=18, wall=2, gap=0.25, body=2);

//parts smoothness
smooth=60; //[60:low, 90:medium, 120:fine]
$fn=smooth;

//To use it as a library, change the value of part to 0.
part=2; //[0:library, 1:body ring, 2:cover ring]

//The space between the inner and outer parts(Varies with printer)[0.25]
part_gap=0.25; //[0:0.05:0.95]

//Inner diameter tolerance(Varies with printer)[0.5]
i_tol=0.5; //[0:0.05:0.95]

//inner diameter of bore[52.5]
bore_idia=52.5;
bore_id=bore_idia+i_tol;

//wall thickness[2]
bore_wall=2; //[1:0.2:4]

//======== main ========//

if (part>0)
thread(body_id=bore_id, wall=bore_wall, gap=part_gap, body=part);

module thread(thread_tip=1, thread_dep=1, body_id, wall, gap, body){
  thread_hi=thread_tip+thread_dep*2;
  ring_hi=thread_tip*2+thread_dep*3;
  echo("ring_hi",ring_hi);
  cover_od=(body_id/2+wall*2+thread_dep+gap)*2;
  echo("cover_od",cover_od);
  for (i=[0:120:240])
  rotate([0, 0, i])
  color("Goldenrod")
  if (body==1){
    translate([0, 0, ring_hi-thread_hi])
      difference(){
        rotate_extrude()
        translate([body_id/2+wall, 0, 0])
          difference(){
            square([thread_dep, thread_hi]);
            for (i=[0, thread_hi])
              translate([thread_dep, i])
                rotate([0, 0, 45])
                square(thread_dep*sqrt(2), true);
          }//d
        cut_arc(cover_od, ring_hi, 50);
      }//d
  }//i
  else if (body==2){
    difference(){
      rotate_extrude()
      translate([cover_od/2-wall-thread_dep, 0, 0])
        difference(){
          square([thread_dep, thread_hi]);
          for (i=[0, thread_hi])
            translate([0, i])
              rotate([0, 0, 45])
              square(thread_dep*sqrt(2), true);
        }//d
      cut_arc(cover_od, ring_hi, 68);
    }//d
    difference(){
      rotate_extrude()
      translate([cover_od/2-wall-thread_dep, 0, 0])
        difference(){
          square([thread_dep, ring_hi]);
          for (i=[0, ring_hi])
            translate([0, i])
              rotate([0, 0, 45])
              square(thread_dep*sqrt(2), true);
        }//d
      cut_arc(cover_od, ring_hi, 16);
    }//d
  }//e
  color("MediumSeaGreen")
  if (body==1){
    linear_extrude(ring_hi)
    difference(){
      circle(r=body_id/2+wall);
      circle(r=body_id/2);
    }//d
  }//i
  else if (body==2){
    linear_extrude(ring_hi)
    difference(){
      circle(r=cover_od/2);
      circle(r=cover_od/2-wall);
    }//d
  }//e
module cut_arc(od, hi, angle){
  ep=0.002;
  for (i=[0, 180-angle])
    rotate([0, 0, i])
    translate([-od/2, 0, hi/2])
      cube([od, od, hi], true);
}//m
//
}//m
//

```


[User]
I'd like to create a double-threaded screw with customizable parameters for use in OpenSCAD. It needs to have two nuts, one on a left-hand thread and one on a right-hand thread.

Here are the specific things I need to be able to adjust:

*   **Output Selection:** I need to be able to choose whether to output the whole assembly ("All"), just the screw itself ("Screw only"), just the left-handed nut ("Left nut only"), or just the right-handed nut ("Right nut only").
*   **Thread Dimensions:**
    *   The outer radius of the screw thread
    *   The inner radius of the screw thread
    *   The pitch (distance between threads)
*   **Thread Counts:**
    *   The number of left-hand threads
    *   The number of right-hand threads
*   **Screw Length:** The overall length of the screw
*   **Nut Dimensions:**
    *   The radius of the nuts
    *   The height of the nuts
*   **Nut Tolerance:** A small tolerance value to increase if the nuts are too tight on the screw
*   **Thread Resolution:** How many radial subdivisions to use for the thread (should affect smoothness)

I'm hoping you can generate a single OpenSCAD file that uses the `revolve` function from the `revolve2` library. I know that this library is not a standard OpenSCAD library so it would need to be inlined. I'm thinking the code should have a `thread` module, a `screw` module and a `Nut` module. The `screw` module should call the thread module twice once for the left handed screw, and once for the right handed screw. I also want the tip of the screw to have a slight conical end.

Let me know if you have any questions!

[Assistant]
Double_Screw.scad:
```
what_to_output = "All"; // [All:All, Screw:Screw only, Left:Left nut only, Right: Right nut only]

thread_outer_radius = 10; // [1:50]
thread_inner_radius = 8;  // [1:50]
thread_pitch = 4; // [1:10]
left_threads = 7; // [1:20]
right_threads = 3; // [1:20]
screw_length = 50; //[10:300]
nut_radius = 16; //[10:60]
nut_height = 10; //[5:30]
//Increase this if the nut jams on the screw
nut_thread_tolerance = 0.1; //[0:0.05:1]
//radial subdivision of the thread
thread_resolution = 60; //[10:120]

// REVOLVE2 LIBRARY COMPONENTS INLINED FOR THINGIVERSE CUSTOMIZER
// NOTE: REVOLVE2 IS LICENCED UNDER Creative Commons - Attribution

// Vector generation
function linspace(start,stop, n) = let (step=(stop-start)/n)
  concat( [ for (i = [0:1:n-0.1]) start+i*step], stop);
function range(start,step,stop) = [ for (i=[start:step:stop]) i ];

// Operations of vectors
function front(v) = v[0];
function back(v) = v[len(v)-1];
function reverse(v) = [for (i=[len(v)-1:-1:0]) v[i]];
function empty(v) = len(v)==0;
function flatten(v) = [ for (a = v) for (b = a) b ] ;
function make_circular(v) = concat(v, [front(v)]);
function pos(v, p, L=-1, R=-1) = //binary_search (v must be sorted)
  L == -1 ? pos(v, p, 0, len(v)-1) :
  L <= R ? let( i = floor((L + R) / 2))
  v[i] < p ? pos(v, p, i + 1, R) :
  v[i] > p ? pos(v, p, L, i - 1) :
  i : -1;
function cum_sum(v, r=[0], i=0) =
  len(r)==len(v) ? r : cum_sum(v, concat(r, back(r)+v[i]), i+1);

// helper functions for dealing with raw_points = [index, x, y, z]
function raw2pt(ipt) = [ipt[1],ipt[2],ipt[3]];
function raw2z(ipt) = ipt[3];
function set_raw_z(ipt,z) = [ipt[0], ipt[1], ipt[2], z];
function raw2indx(ipt) = ipt[0];
function raw_pts2pts (raw_pts) = [ for (col=raw_pts) [for (pt=col) raw2pt(pt) ]];
function raw_pts2indx(raw_pts) = [ for (col=raw_pts) [for (pt=col) raw2indx(pt) ]];

// Geometric operations
function rotate_2D(p, a=0) = concat(
  [cos(a)*p.x-sin(a)*p.y, sin(a)*p.x+cos(a)*p.y],
  [for (i=[2:1:len(p)-1]) p[i]]);
function lookup_2D(pts, z) =
  let(x=[for (p=pts) [p[2],p[0]]], y=[for (p=pts) [p[2],p[1]]])
    [lookup(z,x), lookup(z,y), z];
function do_scale(r, z, table) = r*max(-1e3, lookup(z,table));

// Manipulations of the list of points
function trim_bottom(raw_pts, val) =
  concat([ for (i=[0:1:len(raw_pts)-2]) if ( raw2z(raw_pts[i+1])>val+1e-9 )
    (raw2z(raw_pts[i])<val) ?
      concat(raw2indx(raw_pts[i]), lookup_2D([raw2pt(raw_pts[i]),raw2pt(raw_pts[i+1])], val)) : raw_pts[i]
  ], [back(raw_pts)]);

function trim_top(raw_pts, val) =
  concat([ for (i=[len(raw_pts)-1:-1:1]) if ( raw2z(raw_pts[i-1])<val-1e-9 )
    (raw2z(raw_pts[i])>val) ?
      concat( raw2indx(raw_pts[i]), lookup_2D([raw2pt(raw_pts[i-1]),raw2pt(raw_pts[i])], val)) : raw_pts[i]
  ], [front(raw_pts)]);

function trim(raw_pts, b, t) =
  [ for (col=raw_pts) reverse(trim_top(trim_bottom(col, b), t)) ];

function add_bottom_top(raw_pts, minz, maxz) =
  [for (col=raw_pts) let(b=front(col), t=back(col))
    concat([[b[0]-1,b[1],b[2], minz]], col, [[t[0]+1,t[1],t[2], maxz]]) ];

// Helpers for triangulation
function filter_indx(fcs, indx) =
  [for (fc=fcs) [for (pt=fc) let(j=pos(indx,pt)) if (j!=-1) j]];

function split_square(v,normal=true) = normal ?
  [[v[0],v[1],v[3]], [v[1],v[2],v[3]]] :
// change the splitting diagonal to reduce face stretching
  [[v[0],v[2],v[3]], [v[0],v[1],v[2]]] ;

function filter(fcs, indx, normal) = let(tmp=filter_indx(fcs,indx))
  flatten([for (f=tmp) if (len(f)>=3) len(f)==3 ? [f] : split_square(f,normal)]);

function make_bottom_top_fcs(indx) = let(lns=[for (i=indx) len(i)])
  [cum_sum(lns,[0]), reverse(cum_sum(lns,[front(lns)-1],1))];

function expected_n_fcs(indx, n=0, i=0) =
  i == len(indx) ? n+2 :
    expected_n_fcs(indx, n+len(indx[i])+(i==0?len(back(indx)):len(indx[i-1]))-2, i+1);

// revolve module
module revolve(profile = [[]], length=0, nthreads=1, scale=1,
               preserve_thread_depth=false, preserve_thread_shape=false,
               $fn=$fn, force_alternate_construction=false) {

  // Extend the profile to accomodate the required length and number of threads
  period = back(profile)[0]-front(profile)[0];
  L = (length == 0) ? period : length;
  profile_ext = let(
    Nz = len(profile),
    zps = nthreads > 0 ?
      range(-period*(nthreads+1),period,L):
      range(-period,period,L-period*nthreads)
  ) concat(
    [for (zp = zps) for ( np=[0:1:Nz-2]) [ profile[np][0]+zp, profile[np][1]]],
    [[ profile[Nz-1][0]+back(zps), profile[Nz-1][1]]]
  );

  // Prepare some auxiliary variables
  minZ = min([for (p=profile_ext) p[0]])-1+(nthreads<0 ? period*nthreads : 0);
  maxZ = max([for (p=profile_ext) p[0]])+1+(nthreads>0 ? period*nthreads : 0);
  Nz = len(profile_ext)+1;
  z0 = profile[0][0];
  minR = min([for (p=profile) p[1]]);
  maxR = max([for (p=profile) p[1]]);
  Na = ($fn==undef || $fn<3) ? max(5, maxR*max(abs(scale),1)) : $fn;
  stepa = 360/Na;
  scale_table = [[z0,1],[z0+L, scale]];
  maxS = max(scale,1);

  // Compute the vector of points
  raw_pts = add_bottom_top(
    [for (an=[0:1:Na-1]) [for (pn=[1:1:Nz-2])
      let(ai=an*stepa, zi=profile_ext[pn][0]+an*period*nthreads/Na, ri=profile_ext[pn][1],
        r_z = scale==1? [ri,zi] :
          preserve_thread_shape ?
            rotate_2D([ri,zi], atan(minR*(1-scale)/L)) :
          preserve_thread_depth ?
            [do_scale(minR, zi, scale_table)+ri-minR, zi] :
            [do_scale(ri, zi, scale_table), zi],
        r = r_z[0], z = r_z[1]
      )
      if (r>0) concat(pn+an*Nz, rotate_2D([r, 0, z], ai))]],
    minZ, maxZ);

  // Extract the vector of indexes
  raw_indx = raw_pts2indx(raw_pts);

  // Compute the faces
  raw_fcs = concat(
    [for (col=[0:1:Na-2]) for (row=[0:1:Nz-2]) [
      raw_indx[col][row], raw_indx[col][row+1],
      raw_indx[col+1][row+1], raw_indx[col+1][row]
    ]],
    nthreads>=0 ?
    concat(
      //last side, 4-point faces
      [for (i=[0:1:Nz-nthreads*(len(profile)-1)-2])
        [raw_indx[Na-1][i], raw_indx[Na-1][i+1],
         raw_indx[0][i+nthreads*(len(profile)-1)+1],
         raw_indx[0][i+nthreads*(len(profile)-1)]]],
      //bottom connection, 3-point faces
      [for (i=[0:1:nthreads*(len(profile)-1)-1])
        [raw_indx[Na-1][0], raw_indx[0][i+1],raw_indx[0][i]]],
      //top connection, 3-point faces
      [for (i=[Nz-nthreads*(len(profile)-1)-1:1:Nz-2])
        [raw_indx[Na-1][i], raw_indx[Na-1][i+1],raw_indx[0][Nz-1]]]
      ) :
    concat(
      //last side, 4-point faces
      [for (i=[0:1:Nz-nthreads*(1-len(profile))-2])
        [raw_indx[Na-1][i+nthreads*(1-len(profile))],
         raw_indx[Na-1][i+nthreads*(1-len(profile))+1],
         raw_indx[0][i+1], raw_indx[0][i] ]],
      //bottom connection, 3-point faces
      [for (i=[0:1:nthreads*(1-len(profile))-1])
        [raw_indx[Na-1][i], raw_indx[Na-1][i+1],raw_indx[0][0]]],
      //top connection, 3-point faces
      [for (i=[Nz-nthreads*(1-len(profile))-1:1:Nz-2])
        [raw_indx[Na-1][Nz-1], raw_indx[0][i+1],raw_indx[0][i]]]
      )
  );

  if (force_alternate_construction) {
    revolve_alternate_construction(raw_pts, raw_fcs, nthreads, maxR*maxS, z0, L);
  } else {
    trim_raw_pts = trim(raw_pts,z0,z0+L);
    trim_indx = raw_pts2indx(trim_raw_pts);
    trim_fcs = concat(filter(raw_fcs, flatten(trim_indx), normal=(nthreads>=0)),
                      make_bottom_top_fcs(trim_indx));

    n_fcs = len(trim_fcs);
    exp_n_fcs = expected_n_fcs(trim_indx);
    if (n_fcs < exp_n_fcs) {
      echo(str("REVOLVE INFO: Using alternate construction."));
      revolve_alternate_construction(raw_pts, raw_fcs, nthreads, maxR*maxS,  z0, L);
    } else {
      trim_pts = flatten(raw_pts2pts(trim_raw_pts));
      polyhedron( points = trim_pts, faces = trim_fcs, convexity=10);
    }
  }
}

module revolve_alternate_construction(raw_pts, raw_fcs, nthreads, maxR, z0, length) {
  indx = raw_pts2indx(raw_pts);
  pts  = flatten(raw_pts2pts(raw_pts));
  fcs  = concat(filter(raw_fcs, flatten(indx), normal=(nthreads>=0)),
               make_bottom_top_fcs(indx));
  intersection() {
    polyhedron( points = pts, faces = fcs, convexity=10);
    translate([0,0,z0]) cylinder(r=maxR+1, h=length);
  }
}

////////////////////////////////////////// END OF REVOLVE2 LIBRARY

// THIS IS THE ACTUAL CODE YOU NEED IF YOU HAVE REVOLVE2 INSTALLED
// THE CODE BELOW IS PUBLIC DOMAIN, NO LICENCE, ENJOY

module thread(length = 10, n = 1, tol = 0) {
  revolve(
    [[0, thread_inner_radius+tol],
    [thread_pitch/2,thread_outer_radius+tol],
    [thread_pitch, thread_inner_radius+tol]],
    length = length,
    nthreads = n,
    $fn = thread_resolution
  );
}

module screw() {
  intersection() {
    thread(length = screw_length+nut_height, n = -left_threads);
    thread(length = screw_length+nut_height, n = right_threads);
    // add a bit of conicity to the tip, to help screwing the nuts
    cylinder( r1 = thread_inner_radius+screw_length+nut_height,
              r2 = thread_inner_radius*0.9,
              h = screw_length+nut_height);
  }
  // head
  minkowski() {
    translate([0,0,1]) cylinder(r=nut_radius-2, h=nut_height-2, $fn=6);
    sphere(r=1, $fn=20);
  }
}

module Nut(n_threads) {
  difference() {
    minkowski() {
      translate([0,0,1]) cylinder(r=nut_radius-2, h=nut_height-2, $fn=6);
      sphere(r=1, $fn=20);
    }
    translate([0,0,-nut_height/2]) thread(length = nut_height*2, n = n_threads, tol = nut_thread_tolerance);
  }
}

if ( what_to_output == "All" || what_to_output == "Screw") screw();
if ( what_to_output == "All" || what_to_output == "Right")
  translate([nut_radius*2+3,0,0]) Nut(right_threads);
if ( what_to_output == "All" || what_to_output == "Left")
  translate([0,-(nut_radius*2+3),0]) Nut(-left_threads);
```


[User]
Hey, I'm looking to create some drawer inserts for my parts drawers. I have a bunch of those Jaycar 30-drawer units (the ones they sell here in Australia - link: https://www.jaycar.com.au/30-drawer-unit-parts-cabinet/p/HB6323) and I want to be able to design inserts that fit properly and optionally have internal dividers.

I want to be able to customize the insert's length, width, and height to fit different drawers. There should also be a parameter for the wall thickness, which should affect the outer walls, the base and the internal dividers. I'd also like the option to specify how many segments the insert is divided into using internal walls. Finally, it'd be great to have the option to add chamfered edges to the top inside edge of each segment, making it easier to scoop out small parts.

I'm hoping to generate STLs for each different drawer size and segment configuration that I want to use, so I need a parametric OpenSCAD file to do this. I'm not very experienced with OpenSCAD, so I'm really hoping that you can generate this for me. I don't need any special libraries, just vanilla OpenSCAD code. Also, please use rounded edges on the base of the drawer, but not on any of the dividing segments.

Let me know if you have any questions!

[Assistant]
ToolboxInsert.scad:
```
length = 115;
width = 47;
height = 14.5;
wall_width = 1.6;
segments = 1;
chamfered = false;

inner_width = width - (wall_width * 2);
segment_length = (length - (wall_width * 2) - ((segments - 1) * wall_width)) / segments;

module drawer_insert(l, w, h) {
    roundedcube([length, width, height], .5, "zmin");
}

module drawer_segment(l, w, h) {
    if (chamfered) {
        roundedcube([segment_length, inner_width, (height * 2)], 5, "x");
    } else {
        cube([segment_length, inner_width, (height * 2)]);
    }
}

    difference() {
        drawer_insert();
        for (vp=[wall_width:(segment_length + wall_width):(segment_length * segments)]) {
            translate([vp,wall_width,wall_width]) drawer_segment();
        }

    }

// Higher definition curves
$fs = 0.01;

module roundedcube(size = [1, 1, 1], radius, apply_to) {
	translate_min = radius;
	translate_xmax = size[0] - radius;
	translate_ymax = size[1] - radius;
	translate_zmax = size[2] - radius;

	diameter = radius * 2;

	module build_point(type = "sphere", rotate = [0, 0, 0]) {
		if (type == "sphere") {
			sphere(r = radius);
		} else if (type == "cylinder") {
			rotate(a = rotate)
			cylinder(h = diameter, r = radius, center = true);
		}
	}

    hull() {
        for (translate_x = [translate_min, translate_xmax]) {
            x_at = (translate_x == translate_min) ? "min" : "max";
            for (translate_y = [translate_min, translate_ymax]) {
                y_at = (translate_y == translate_min) ? "min" : "max";
                for (translate_z = [translate_min, translate_zmax]) {
                    z_at = (translate_z == translate_min) ? "min" : "max";

                    translate(v = [translate_x, translate_y, translate_z])
                    if (
                        (apply_to == "all") ||
                        (apply_to == "xmin" && x_at == "min") || (apply_to == "xmax" && x_at == "max") ||
                        (apply_to == "ymin" && y_at == "min") || (apply_to == "ymax" && y_at == "max") ||
                        (apply_to == "zmin" && z_at == "min") || (apply_to == "zmax" && z_at == "max")
                    ) {
                        build_point("sphere");
                    } else {
                        rotate =
                            (apply_to == "xmin" || apply_to == "xmax" || apply_to == "x") ? [0, 90, 0] : (
                            (apply_to == "ymin" || apply_to == "ymax" || apply_to == "y") ? [90, 90, 0] :
                            [0, 0, 0]
                        );
                        build_point("cylinder", rotate);
                    }
                }
            }
        }
    }
}
```


[User]
I want to create a customizable trophy using OpenSCAD. I'm envisioning a design with a few key components: a base, a stem, and a plate with customizable text.

For the base, I'd like a star shape, where the number of points can be specified, but it should only be an even number of points. So, I'd specify a parameter that represents half the number of points of the star. The base should have two identical star shapes on top of each other with a slight rotation applied to the second.

The stem should be a twisted extrusion. I'd like to be able to control both the number of sides of the stem's cross-section, and the amount of twist. I don't need to control the scaling factor at all, as I'll handle this in the slicer. The twist is to be applied as a twist modifier so that a twist modifier of '1' is a full twist (360 degrees), a modifier of '0.5' is a half twist, etc.

Finally, there's the plate, which will sit on top of the stem and will hold some text. The plate will be a polygon with a certain number of sides. A key requirement here is that if the plate has very few sides, then I want the text to be visible with a cutout behind it. But, if the plate has many sides (a high number of sides), then the plate needs to be more circular, and the text shouldn't be in a cutout, but rather the plate should be solid behind the text. I'd like a parameter for specifying the number of sides of the plate shape. I also want a text parameter so I can specify the text that will go on the plate, preferably with the "News706 BT" font, and also be able to center it both horizontally and vertically. The text should sit slightly proud of the plate surface.

I'd like to be able to control the following parameters:

*   `ss`: The number of sides of the stem (integer).
*   `tm`: A twist modifier for the stem (float), where 1 represents a full twist (360 degrees), 0 represents no twist, etc.
*   `bs`: Half the number of points on the star base (integer).
*   `ps`: The number of sides of the plate shape (integer).
*   `text`: The text to display on the plate (string).

Could you generate the OpenSCAD code for this? I don't need any extra libraries.

[Assistant]
Trophy_Customizer.scad:
```
//variables;
 ss=6;
 tm=1;
 bs=3;
 ps=5;
 text="1";

//dependant variable;
 pr=90+(ps+1)%2*(180/ps);

//stem;
 union()
 {
  translate ([0,0,9.441])
  {
   linear_extrude(height = 64.72, center = false, convexity = 10, twist = tm*360/ss, scale= .33, $fn=200, slices= 500)
   offset(r = 1)
   {
    circle(r=15.276, $fn=ss);
   }
  }

//base;
 linear_extrude(height = 9.441, center = false, convexity = 10, scale= .9, $fn=100, slices= 100)
 offset(r = 2)
 {
  circle(r=27.466, $fn=bs);
 }
 rotate ([0,0,180/bs])
 {
  linear_extrude(height = 9.441, center = false, convexity = 10, scale= .9, $fn=100, slices= 100)
  offset(r = 2)
  {
   circle(r=27.466, $fn=bs);
  }
 }

//plate;
 translate([0,0,74.161+27.466*cos(180/ps)])
 {
  rotate([90,0,0])
  {
   union()
   {
    union()
    {
     difference()
     {
      rotate([0,0,pr])
      {
       linear_extrude(height = 5.834, center = false, convexity = 10, $fn=100, slices= 100)
       offset(r = 2)
       {
        circle(r=27.466, $fn=ps);
       }
      }
      translate ([0,0,3])
      {
       rotate([0,0,pr])
       {
        linear_extrude(height = 5.834, center = false, convexity = 10, $fn=100, slices= 100)
        offset(r = 2)
        {
         circle(r=22, $fn=ps);
        }
       }
      }
     }
     difference()
     {
      resize([22*cos(180/ps)], auto=true)
      {
       linear_extrude(height = 5.834, center = false, convexity = 10, $fn=100, slices= 100)
       text(text, font="News706 BT", halign="center", valign="center");
      }
      translate([0,0,5.834])
      {
       rotate([0,0,pr])
       {
        linear_extrude(height = 20, center = false, convexity = 10, $fn=100, slices= 100)
      circle(r=22, $fn=ps);
       }
      }
     }
    }
    mirror([0,0,1])
    {
    union()
    {
     difference()
     {
      rotate([0,0,pr])
      {
       linear_extrude(height = 5.834, center = false, convexity = 10, $fn=100, slices= 100)
       offset(r = 2)
       {
        circle(r=27.466, $fn=ps);
       }
      }
      translate ([0,0,3])
      {
      rotate([0,0,pr])
      {
       linear_extrude(height=5.834, center=false, convexity=10, $fn=100, slices=100)
       offset(r=2)
       {
        circle(r=22, $fn=ps);
       }
      }
     }
    }
    mirror ([1,0,0])
    {
     difference()
     {
      resize([22*cos(180/ps)], auto=true)
      linear_extrude(height = 5.834, center = false, convexity = 10, $fn=100, slices= 100)
      text(text, font="News706 BT", halign="center", valign="center");
      translate([0,0,5.834])
      {
       rotate([0,0,pr])
       {
        linear_extrude(height=20, center=false, convexity=10, $fn=100, slices=100)
        circle(r=22, $fn=ps);
       }
      }
     }
    }
   }
  }
 }
 }
 }
 }
```


[User]
I'm looking to create a customizable battery holder, and I really like the design and functionality of this one I found on Thingiverse (link: https://www.thingiverse.com/thing:57281). It's great that you can specify the battery type, number of rows/columns, and some other parameters. However, the Thingiverse customizer is not ideal. I would like a parametric OpenSCAD design that I can easily adjust through code, and which produces two parts: a base and a lid.

Here are the key features and parameters I would need in the design:

*   **Battery Type:**  The design needs to be configurable for different battery diameters. I'm primarily interested in AA, AAA, 123A, and CR2 battery sizes. I know their approximate diameters are: AA-14.6mm, AAA-10.7mm, 123A-16.9mm, and CR2-15.6mm. I would prefer to specify this using a string or enum value (e.g., "AA", "AAA", "123A", "CR2").

*   **Number of Batteries:** I need to specify the number of batteries in a grid using `columns` and `rows` parameters.

*   **Wall Thickness:** I need a parameter for the wall thickness around the batteries, and another for the base thickness.

*   **Lid/Base Interface:** The lid and base should have a lip to create a secure fit. I need a parameter for the height of the lip, as well as a parameter to control the gap between the lid and base to adjust the tightness of the fit.

*   **Labeling:**  It would be great to be able to add a text label, either embossed or extruded, on either the lid or base. I would need parameters for the text itself, the font file to use, and the depth of the extrusion or embossing, as well as the height of the text. I would prefer a selection of fonts that matches those found in the provided code (`write/orbitron.dxf`, `write/letters.dxf`, `write/knewave.dxf`, `write/BlackRose.dxf`, `write/braille.dxf`), and I assume you would also be using the `write` library for these.

*   **Output:** The final design should output two parts: the main base piece that holds the batteries and the lid piece which will fit onto the main base. The two parts should be next to each other on the output so that they can be printed at the same time.

The original design used functions like `cylinderAt`, `cubeAt`, and `roundRect`. I think those are useful modular functions, and if you could use those, it would be great. The `batteryGrid` function is also useful for creating the internal battery grid. I would like those functions included in whatever design you create.

Essentially, I'm looking for a very customizable battery holder that mirrors the functionality of the Thingiverse design but with the flexibility of an OpenSCAD script. The core functionality of the `batteryGrid` function should be kept, as it appears to work well. I want to be able to easily adjust all of the dimensions via parameters at the start of the file.

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

// part type, you will need a top and bottom piece
_part = "bottom"; //[top, bottom]

// AA-14.6mm, AAA-10.7mm, 123A-16.9mm, CR2-15.6mm
_batteryDiameter = 10.7;

// height of the battery recess (height of top and bottom piece should be equal to or slightly larger than the battery height)
_batteryHeight = 50.5;

// number of batteries across
_columns = 2; // [1:50]

// number of batteries deep
_rows = 2; // [1:50]

// thickness of the side walls
_walls = 0.8;

// thickness of the bottom layer
_base = 0.8;

// height of the lip where the parts overlap, increase the value for a more secure fit
_lipHeight = 3;

// gap between the top and bottom pieces, decrease the value for a tighter fit.
_fitGap = 0.05;

// rendered on top of the lid or on the bottom of the base (you'll need to rotate the tray to see the text underneath)
_labelText = "";

// font used to render the label
_labelFont = "write/orbitron.dxf"; // ["write/orbitron.dxf":Orbitron, "write/letters.dxf":Basic, "write/knewave.dxf":KneWave, "write/BlackRose.dxf":BlackRose, "write/braille.dxf":Braille]

// depth of the label (negative values to emboss, positive values to extrude)
_labelDepth = -0.3;

// height of the label in mm
_labelHeight = 8;

///////////////////////////////////////////////////////////////////////////

module cylinderAt(r, h, x, y, z) {
	translate([x,y,z]) {
		cylinder(r=r, h=h, center=true);
	}
}

module cubeAt(xy, h, x, y) {
	translate([x,y,0]) {
		cube(size=[xy,xy,h], center=true);
	}
}

module roundRect(width, depth, height, rounding) {
	hull()
	for (x=[-width/2 + rounding, width/2 - rounding])
	for (y=[-depth/2 + rounding, depth/2 - rounding]) {
		translate([x,y])
		cylinder(r=rounding, h=height);
	}
}

module batteryGrid(diameter, height, rows, columns) {
	angle = 35;
	r = diameter/2;
	cut = 2*r*sin(angle);
	tan = tan(angle);
	filletCenter = r - r * tan;
	filletCenter2 = r + r * tan;
	filletOffset = r * tan;
	filletRadius = r/cos(angle) - r;
	xstart = ((columns-1) * diameter)/2;
	ystart = ((rows-1) * diameter)/2;
	eps = 0.1;

	union() {
		difference() {
			union() {
				// cylinder
				for (x=[-xstart:diameter:xstart+eps]) {
					for (y=[-ystart:diameter:ystart+eps]) {
						cylinderAt(r,height,x,y,0);
					}
				}

				if (rows > 1) {
					for (x=[-xstart:diameter:xstart+eps])
					for (y=[-ystart+r:diameter:ystart-r+eps]) {
						cubeAt(cut, height, x, y);
					}
				}

				if (columns > 1) {
					for (x=[-xstart+r:diameter:xstart-r+eps])
					for (y=[-ystart:diameter:ystart+eps]) {
						cubeAt(cut, height, x, y);
					}

				}
			}

			if (columns > 1) {
				for (x=[-xstart+r:diameter:xstart-r+eps])
				for (y=[-ystart-r:diameter:ystart+r+eps])
				for(y2=[filletOffset, -filletOffset]) {
					cylinderAt(filletRadius,height+eps,x,r+y+y2,0);
				}
			}

			if (rows > 1) {
				for (x=[-xstart:diameter:xstart+eps])
				for (y=[-ystart:diameter:ystart+eps])
				for(x2=[filletOffset, -filletOffset]) {
					cylinderAt(filletRadius, height+eps,x + x2, r+y, 0);
				}
			}
		}
	}
}

module makeTray(diameter, height, rows, columns, wall, base, lipHeight, fitGap, label, lfont, ldepth, lheight) {
	eps = 0.1;
	wall2 = wall * 2;
	rounding = diameter/2 + wall;
	width = diameter * columns + wall*2;
	depth = diameter * rows + wall*2;
	gridHeight = (lipHeight > 0) ? height + lipHeight - fitGap : height;

	union() {
		difference() {
			roundRect(width, depth, gridHeight+base, rounding);

			translate([0,0,gridHeight/2 + base + eps/2]) {
				batteryGrid(diameter, gridHeight+eps, rows, columns);
			}

			if (lipHeight < 0) { // lid
				assign(gap = min(fitGap, -0.01)) {
					translate([0,0,base+height+lipHeight]) {
						roundRect(width - 2*wall+gap, depth - 2*wall+gap, -lipHeight+eps, rounding - wall);
					}
				}
			} else if (lipHeight > 0) {
				assign(gap = max(fitGap, 0.01)) {
					translate([0,0,base+height])
					difference() {
						translate([0,0,(lipHeight+eps)/2]) {
							cube(size=[width+eps, depth+eps, lipHeight+eps], center=true);
						}

						translate([0,0,-eps]) {
							roundRect(width - 2*(wall+gap), depth - 2*(wall+gap), lipHeight + 2*eps, rounding - wall - gap);
						}
					}

				//	bevel
				if (lipHeight > wall) {
					for (m = [-1,1]) {
						hull()
						for (o = [0,1]) {
							translate([0,m*(depth/2 + lipHeight/2 - wall*2 + o*wall - gap), base + height + 1.5*lipHeight - o*wall - gap]) {
								cube(size=[width, lipHeight, lipHeight], center=true);
							}
						}

						hull()
						for (o = [0,1]) {
							translate([m*(width/2 + lipHeight/2 - wall*2 + o*wall - gap),0, base + height + 1.5*lipHeight - o * wall - gap ]) {
								cube(size=[lipHeight, depth, lipHeight], center=true);
							}
						}
					}
					}
				}
			}

			if (ldepth < 0) {
				addLabel(label, (-ldepth+eps)/2 - eps, -ldepth+eps, lheight, lfont);
			}
		}
		if (ldepth > 0) {
			addLabel(label, -(ldepth+eps)/2 + eps, ldepth+eps, lheight, lfont);
		}
	}
}

module addLabel(label, zoffset, depth, height, font) {
	if (label != "") {
		translate([0,0,zoffset])
		mirror([0,1,0])
		write(label, t=depth, h=height, font=font, space=1.2, center=true);
	}
}

module make($fn=90) {

    top_height = 0.25 * _batteryHeight;
    bottom_height = _batteryHeight - top_height;

    // Top
		makeTray(_batteryDiameter, top_height, _rows, _columns, _walls, _base, -_lipHeight, _fitGap,
					_labelText, _labelFont, _labelDepth, _labelHeight);
    // Bottom
		translate([0,(_batteryDiameter*(_rows+1)),0]) makeTray(_batteryDiameter, bottom_height, _rows, _columns, _walls, _base, _lipHeight, _fitGap,
					_labelText, _labelFont, _labelDepth, _labelHeight);
}

make();

```


[User]
I'm looking to create a parametric belt clamp for various timing belt profiles, specifically GT2 2mm, T2.5, T5, T10, and MXL. I need it to be customizable with several parameters and be compatible with the threadlib and parametric_timing_belt libraries. Could you design the OpenSCAD code for this? I'd prefer it to be as modular as possible, so it's easy for me to change if necessary.

Here are the requirements:

*   **Belt Profiles:** Should support the belt profiles mentioned above (GT2 2mm, T2.5, T5, T10, and MXL), using the provided timing_belts library.
*   **Belt Width:** I need a parameter to set the belt width.
*   **Belt Oversize:** A parameter to define an oversize value for cutting out the bolt, ensuring that the cutout is correct when the belt is included.
*   **Thread:**  I'll need to be able to specify the thread type (e.g., "M7", "M8"). The bolt and nut threads should be generated using the threadlib library.
*   **Thread Turns:** Parameters to control the number of thread turns for both the bolt and the nut. I want the nut to have more thread turns so it can be used as an adjuster.
*   **Nut Hexagon:** Customizable hexagon parameters: height, wrench size, and cutaway diameter (for the bolt thread clearance).
*   **Bolt Flattening:** Options to flatten the bolt in X, Y, and Z dimensions for printing purposes, this should be optional.
*   **Display Options:**  I'd like to be able to display the assembled part with the belt, only the nut, only the bolt, or a recommended printing position.
*   **Rendering:** The design should have an adjustable `$fn` rendering constant.
*   **Part Offsets:**  When displaying parts separately, the nut should have adjustable X, Y and Z offsets relative to the bolt.

Essentially, I want a fully parametric clamp that allows me to specify all those different dimensions and properties. I'd prefer to have all of the code, including the helper modules, in one SCAD file.

[Assistant]
belt_clamp.scad:
```
use <threadlib/threadlib.scad> // Needed for the thread: https://github.com/adrianschlatter/threadlib
use <parametric_timing_belt/timing_belts.scad> // https://www.thingiverse.com/thing:194554

/* [ available belt profiles from timing belt library ] */
my_belt_profile = 0; // [0:GT2 2mm pitch, 1:T2.5, 2:T5, 3:T10, 4:MXL]

/* [ Customizable properties of the clamping ] */

// belt width
my_belt_width = 6;
// belt oversize to cut out the bolt properly (otherwise you won't get two half bolts -- rather only one with a hole)
my_belt_oversize  = 2;

// thread type (has to be manually adjusted to fit to the belt size / width)
type = "M7";
// thread turns of bolt
turns_bolt = 8;
// thread turns of nut (if you want to use it as adjuster these have to be more than the turns of the bolt)
turns_nut = 10;
/* [ Properties of the hexagon of the nut ] */
// height of the hexagon
hexagon_height = 6;
// hexagon wrenchsize
hexagon_wrenchsize = 9;
// diameter for cutaway of hexagon (has to be manually fitted to the thread)
hexagon_cutaway_diameter = 8;
// necessary for threadlib
Douter = thread_specs(str(type, "-int"))[2] * 1.2;
/* [ Optional: Flattening the bolt] */
// flatten x dimension of bolt (helpful especially in the recommended print position to avoid too much support) if this is smaller than the thread diameter, the bolt will be flattened
flatten_x = 6;
// flatten y dimension of bolt (normally not necessary. Just make sure that this is bigger than the thread diameter)
flatten_y = 10;
// flatten z dimension of bolt (normally not necessary. Just make sure that this is bigger than 2x the bolt length)
flatten_z = 100;
/* [ Printing and rendering] */
// Do you want to show the belt? (only necessary for testing purpose)
show = "no_belt"; // [show_belt:show the assembled part with belt, no_belt:nut and bolt without belt, only_nut:show nut only, only_bolt: show bolt only, printing_pos: recommended printing position]
// Rendering constant
$fn=60;
// Y offset between nut and bolt when printed separately without belt (not automatically adjusted to the nut/bolt size)
nut_y_offset = 10;
// Z offset for nut in preferred printing position (not automatically adjusted to the same baseline)
nut_z_offset = 2.5;
// X offset for nut in preferred printing position (not automatically adjusted to the length of bolt / width of nut)
nut_x_offset = 4;

// the belt
if(show == "show_belt") {
color("blue")
translate([0,0.3,-10])
rotate([0,-90,0])
belt_len(profile = my_belt_profile, belt_width = my_belt_width, len = 30);
}

// the bolt
if(!(show=="only_nut")) {
translate([show=="printing_pos"?-nut_x_offset:0,0,show=="printing_pos"?nut_z_offset:0])
rotate([0,show=="printing_pos"?90:0,0])
intersection() {
difference() {
color("yellow")
bolt(type, turns_bolt, Douter);

translate([0,0.3,-10])
rotate([0,-90,0])
color("blue")
belt_len(profile = my_belt_profile, belt_width = my_belt_width+my_belt_oversize, len = 30);
}
cube([flatten_x, flatten_y, flatten_z], center=true);
}
}

// the nut
if(!(show=="only_bolt")) {
translate([0,(show=="show_belt")?0:nut_y_offset,0])
union() {
color("green")
nut(type, turns_nut, Douter);
difference() {
color("green")
hexagon(hexagon_wrenchsize,hexagon_height);
cylinder(d=hexagon_cutaway_diameter,hexagon_height);
}
}
}

// will draw a hexagon with given width and height
module hexagon(width,height) {
/* the only calculation to be done is to get the second dimension of the base cube:
    - in the corner there's a 60° angle
    - r*sin(60)=width/2
    - r*cos(60)=depth/2
    therefore depth = 2*r*cos(60) = 2*width/(2*sin(60))*cos(60)
    depth = width*cos(60)/sin(60) = width/tan(60)
*/
depth = width/tan(60);
translate([0,0,height/2])
union() {
for (i=[0,120,240])
  rotate([0,0,i])
    cube([width,depth,height],center=true);
}
}

// will produce round edges by the minkowski function. But the object will grow in each dimension by "radius"
module round_edge(radius,fn_round) {
  minkowski() {
    children(0);
    sphere(radius,$fn=fn_round);
  }
}

// Johann Schuster
// version 0.04
// January 2021
```


[User]
I'd like to create a 3D model of a stylized flower, leaf, and pot that are designed to be assembled together using a wooden stick. The idea is to mimic a simple, handcrafted wooden flower I have, but make it parametric so I can easily adjust the sizes and shapes.

Here's a breakdown of the pieces and how they should be designed:

**Overall:**
*   The design will consist of three separate pieces: a pot, a leaf, and a flower.
*   They all will have a hole designed to fit a wooden stick of a specified diameter.
*   The design should be parametric, allowing for changes in key dimensions.
*   I'd like to use Bezier curves for the outlines of the flower and leaf.

**Pot:**
*   The pot should be a basic shape, like a truncated cone (cylinder with different top and bottom diameters) with an optional square base around the bottom.
*   It needs a central hole for the stick.
*   Parameters:
    *   `wooden_stick_diam`: Diameter of the wooden stick (affects the hole size).
    *   `upper_diameter`: Diameter of the top opening of the pot. If set to 0, it should default to a value relative to `wooden_stick_diam` (e.g., `wooden_stick_diam * 9`).
    *   `lower_diameter`: Diameter of the base of the pot. If set to 0, it should default to a value relative to `wooden_stick_diam` (e.g., `wooden_stick_diam * 14`).
    *   `pot_height`: Height of the pot. If set to 0, it should default to a value relative to `wooden_stick_diam` (e.g., `wooden_stick_diam * 12`).
    *   `square_border`: A 2D vector [x,y] representing the size of the square base before extrusion. If both x and y are 0, it should not be extruded.  If not it should be extruded at the lower part of the cylinder.
*   A small tolerance should be added to the hole to ensure a good fit for the wooden stick.

**Leaf:**
*   The leaf should be flat and have a curved shape, created using two Bezier curves.
*   It should have a hole for the wooden stick, positioned so the leaf has an intended angle.
*   Parameters:
    *   `wooden_stick_diam`: Diameter of the wooden stick (affects the hole size).
    *   `leaf_end`: 2D vector [x, y] determining the end point of the leaf's curve. One side of the leaf starts at [0,0].
    *    `curvature_control_side1`: 2D vector [width, height] controlling the shape of the first Bezier curve.
    *   `curvature_control_side2`:  2D vector [width, height] controlling the shape of the second Bezier curve. The width here should be negative for symmetry. The height should be equal to `curvature_control_side1`
    *   `leaf_angle`: Angle (in degrees) at which the leaf is attached to the stick.
*   A small tolerance should be added to the hole to ensure a good fit for the wooden stick.

**Flower:**
*   The flower should be a 3D, rounded shape, created by rotating a Bezier curve.
*   It should have a hole for the wooden stick.
*   Parameters:
    *   `wooden_stick_diam`: Diameter of the wooden stick (affects the hole size).
    *   `flower_heigth`: Overall height of the flower.
    *   `flower_mouth_width`: Diameter of the opening at the top of the flower.
    *   `curvature_control_width`: Max diameter inside the flower (the "belly").
    *   `curvature_control_heigth`: Height at which the "belly" diameter is at its maximum.
*   A small tolerance should be added to the hole to ensure a good fit for the wooden stick.
*   The design should avoid failing on 360 degree rotation in the rotate_extrude.

**General Parameters:**
*   `bezier_step`: Step size used in the Bezier curve computation.
*   `wall_width`: Minimum wall thickness for all pieces.
*   `tolerance`: Printer tolerance added to hole diameters.
*  `fn`: Resolution of the circles and cylinders.
*   `mode`: A string that can be set to "Assembly", "Pot", "Leaf", or "Flower" to render the corresponding model.

**Libraries**
*   Please generate a design that does not rely on any external libraries.

The code should define functions to calculate the Bezier curves, and each of the main parts (pot, leaf and flower) should be a separate module. The code should also have a final module for assembly, putting together all pieces. Finally the code should be able to render each one separately if the `mode` parameter is set as described.

I think that's all, let me know if I missed anything!

[Assistant]
wooden_stick_flower.scad:
```

/* [Export settings] */
// You can use this mode setting to export each of the models or see the final assembly with all of them
mode = "Assembly"; // [Assembly, Pot, Leaf, Flower]

/* [Model settings] */
// Diameter of the wooden stick to use. Note that the hole model depends on this measure :) (mm)
wooden_stick_diam = 2.8;

// The step between one point to the next in the bezier curve computation
bezier_step = 0.03;

// Minimum wall width
wall_width = 2;

/* [Flower settings] */
// The heigth of the flower (mm)
flower_heigth = 35;

// The diameter of the upper hole, the "mouth" (mm)
flower_mouth_width = 14;

// The max diameter inside the flower (the "belly") (mm)
curvature_control_width = 25;

// Heigth in which this max curvature is placed (mm)
curvature_control_heigth = 10;

/* [Leaf settings] */
// End point of the leaf, one of the sides is placed in [0,0] and the other is up to you (mm)
leaf_end = [0,50];

// The max width from center to side and hight in which this belly is placed  (mm)
curvature_control_side1 = [26,21];

// Same with side1 but on the other side. Set width to negative and same heigth to be simetric (mm)
curvature_control_side2 = [26,21];

// The hole for the stick is made so that the leaf remains at this angle (deg)
leaf_angle = 30;

/* [Pot settings] */
// Default related to wooden stick diam when is [0,0]. If set means X and Y of the square border before extrusion (mm)
square_border = [0,0];

// Default related to wooden stick diam when is 0. (mm)
upper_diameter = 0;

// Default related to wooden stick diam when is 0. (mm)
lower_diameter = 0;

// Default related to wooden stick diam when is 0. (mm)
pot_height = 0;

/* [Printer settings] */
// Printer tolerance. Printers are not perfect, pieces need a bit of margin to fit. Note that some
// of the pieces do not include this tolerance as they are supposed to fit tight (mm)
tolerance = 0.4;

/* [Other] */
// $fn resolution
fn = 120;

// Quadratic Bezier curve (take advantage of dot notation index for 2d points :) )
// p1 and p2 are the starting and end points, pC is the control point to adjust the curve, use step as you would use the fn param
function quadBezierX(p1, pC, p2, step) = pow(1-step,2) * p1.x + ( 1-step)*2*step*pC.x+pow(step,2)*p2.x;
function quadBezierY(p1, pC, p2, step) = pow(1-step,2) * p1.y + ( 1-step)*2*step*pC.y+pow(step,2)*p2.y;
function quadBezierZ(p1, pC, p2, step) = pow(1-step,2) * p1.z + ( 1-step)*2*step*pC.z+pow(step,2)*p2.z;

function quadraticBezierPoint2D(p1,pC,p2,step) = [quadBezierX(p1, pC, p2, step), quadBezierY(p1, pC, p2, step)];
function quadraticBezierCurve2D(p1, pC, p2) = [for (step=[0:bezier_step:1]) quadraticBezierPoint2D(p1, pC, p2, step)];

function quadraticBezierPoint3D(p1,pC,p2,step) = [quadBezierX(p1, pC, p2, step), quadBezierY(p1, pC, p2, step), quadBezierZ(p1, pC, p2, step)];
function quadraticBezierCurve3D(p1, pC, p2) = [for (step=[0:bezier_step:1]) quadraticBezierPoint3D(p1, pC, p2, step)];

// Pot
module pot()
{
    difference()
    {
        d1 = (upper_diameter == 0) ? wooden_stick_diam*9 : upper_diameter;
        d2 = (lower_diameter == 0) ? wooden_stick_diam*14 : lower_diameter;
        h = (pot_height == 0) ? wooden_stick_diam*12 : pot_height;
        union()
        {
            cylinder(d1= d1, d2 = d2, h = h, $fn = fn);

            sq_size_x = (square_border.x != 0) ?  square_border.x : wooden_stick_diam*2;
            sq_size_z = (square_border.x != 0) ? square_border.y : wooden_stick_diam*3;

            relation_x = 0.6;
            relation_z = 0.6;
            translation_x = d2/2-sq_size_x*relation_x;
            translation_z = h-sq_size_z*relation_z;
            translate([0,0,translation_z])
            rotate_extrude(angle = 360, convexity = 2, $fn = fn)
            translate([translation_x,0,0])
            square(size = [sq_size_x, sq_size_z]);
        }
        // Stick hole
        translate([0,0,wall_width*2])
        cylinder(d = wooden_stick_diam+tolerance, h = h, $fn = fn);
    }
}

// Base for the voronoi version
module base()
{
    h = wall_width*5;
    difference()
    {
        union()
        {
            d2 = (lower_diameter == 0) ? wooden_stick_diam*14 : lower_diameter;
            cylinder(d = d2, h = wall_width, $fn = fn);

            cylinder(d = wooden_stick_diam+tolerance+wall_width*2, h = h, $fn = fn);
        }
        translate([0,0,-0.1])
        cylinder(d = wooden_stick_diam+tolerance, h = h*2, $fn = fn);
    }
}

// Leaf
module leaf(translation = [0,0,0])
{

    p1 = [0,0];
    p2 = leaf_end;

    pC1 = [(curvature_control_side1.x/2)*2 - (p1.x + p2.x)/2 , curvature_control_side1.y*2 - (p1.y + p2.y)/2];
    pC2 = [(-abs(curvature_control_side2.x)/2)*2 - (p1.x + p2.x)/2 , curvature_control_side2.y*2 - (p1.y + p2.y)/2];

    points1 = concat([p1], quadraticBezierCurve2D(p1, pC1, p2), [p2]);
    points2 = concat([p1], quadraticBezierCurve2D(p1, pC2, p2), [p2]);

    translate(translation)
    difference()
    {
        translate([0,-wall_width*4,0])
        rotate([leaf_angle,0,0])
        linear_extrude(height = wall_width, convexity = 10)
        union()
        {
            polygon(points1);
            polygon(points2);
        }
        // stick hole
        cylinder(d = wooden_stick_diam + tolerance, h = wall_width*10, $fn = fn);
    }
}

module 2dline(points, point_rad)
{
    union()
    {
        for (index=[0:len(points)-2])
        {
            hull()
            {
                translate(points[index]) circle(r = point_rad, $fn = fn);
                translate(points[index+1]) circle(r = point_rad, $fn = fn);
            }
        }
    }
}

// Flower
module flower(translation = [0,0,0])
{
    // For a rotate extrude its better if all points are in the same cuadrant (X and Y > 0)
    p1 = [wall_width/2,wall_width/2];
    p2 = [flower_mouth_width/2,flower_heigth];
    pC = [(curvature_control_width/2)*2 - (p1.x + p2.x)/2 , curvature_control_heigth*2 - (p1.y + p2.y)/2];
    //pC = [curvature_control_width,curvature_control_heigth];

    points = quadraticBezierCurve2D(p1, pC, p2);
    points1 = quadraticBezierCurve2D(p1, [-pC.x,pC.y], [-p2.x,p2.y]);

    translate(translation)
    difference()
    {
        union()
        {
            // For some reason 360 fails -.- Make two partial instead
            rotate_extrude(angle = 270, convexity = 10, $fn = fn)
            2dline(points,wall_width/2); // Uses it as radious, not as diameter :)

            rotate([0,0,180])
            rotate_extrude(angle = 270, convexity = 10, $fn = fn)
            2dline(points,wall_width/2); // Uses it as radious, not as diameter :)

            // Make some structure for the stick :)
            diam = pC.x*2/3;
            translate([0,0,diam/2]) sphere(d = diam, $fn = fn);
        }
        // Hole for the stick
        h = wall_width*5;
        translate([0,0,-0.1]) cylinder(d = wooden_stick_diam + tolerance, h = h, $fn = fn);
    }
}

module assembly()
{
    color("white")
    pot();
    color("green")
    leaf([0,0,50]);
    color("red")
    flower([0,0,70]);

    // base();
}

// Exportable modules
if (mode == "Assembly") {
    assembly();
} else if (mode == "Pot") {
    pot();
} else if (mode == "Leaf") {
    leaf();
} else if (mode == "Flower") {
    flower();
}

```


[User]
I'm looking to create a drill-powered jig for my Addi Express King Size knitting machine. Basically, this jig will attach to the crank arm of the knitting machine and allow me to use a drill to rotate the mechanism for quicker knitting. I have an existing design but would like a parametric version that I can tweak.

The jig will consist of a cup-like structure that fits over the crank arm axis, with a cutout that matches the shape of the arm itself. I want two options for the attachment to the drill: either a male hex shaft that inserts into the drill chuck, or a female hex socket to receive the drill's hex bit.

Here are the parameters I would like to control:

*   **`cutout_height`**: The height of the cutout that corresponds to the height of the crank arm.
*   **`hole_width`**: The width of the crank arm cutout.
*   **`cup_thickness`**: The wall thickness of the cup part of the jig.
*   **`crank_axis_diameter`**: The diameter of the knitting machine's crank arm axis.
*   **`bit_height`**: The height or depth of the hex bit attachment (either the male or female end).
*   **`bit_diameter`**: The diameter of the hex bit across the corners (not side to side).
*   **`model_number`**: A selector to switch between the male (1) and female (2) drill attachment.
*   **`bolt_diameter`**: If using the female version, the diameter of the countersunk bolt needed.
*   **`contraction`**: A small amount that can be used to shrink the hole for a tighter fit around the drill bit.

I will be using the `MCAD` library for the flat head screw functionality, so that should be included in the code.

I'd like the design to include a main module which selects the male or female version, and then submodules that create the various parts. For example I imagine that `model_f()` for the male shaft design and `model_m()` for the female shaft design will make sense. These will call modules such as cup, cap, buttresses, crank_cutout, and some specific to each model number (such as bit_shaft or csk_bolt). I want the code to be well commented, and it should look very similar in structure and operation to the included file, but parametric, generated from the information I've provided.

[Assistant]
Knitting_Machine_Drill_Powered_Jig_2.scad:
```
//Knitting Machine Drill Power Jig
//January 2021
//Designed by Kimberly Schumann
//Shaft option and documentation by Ari M. Diacou

use <MCAD\metric_fastners.scad>

//The height of the crank arm
cutout_height=19;
//Width of the crank arm
hole_width=27;
//The thickness of the wall of the part
cup_thickness=2;
//Measure the diameter of the crank axis
crank_axis_diameter=51;
//Of the Hex bit
bit_height=13;
//Of the hex bit measured from corner to corner (not side to side)
bit_diameter=7.7;
//1:For use with a hex shaft 2:For use with a flathead bolt
model_number=1;//[1,2]
//For the male design, what size flathead screw in mm10-23 (US#8=2.9mm, US#6=2.6mm)
bolt_diameter=3.7;
contraction=.03;
//////////////////derived parameters
ep=0+0.05;
cup_diameter=crank_axis_diameter+cup_thickness*2;
cup_height=cutout_height+cup_thickness*1;
buttress_height=model_number==1?bit_height:cup_thickness*2;
buttress_thickness=bit_diameter*.75;
n=6+0;
///////////////////main
if(model_number==1)
    model_f();
else
    model_m();
//////////////////modules
module model_f(){
    difference(){
        union(){
            cup();
            translate([0,0,cup_height])
                intersection(){
                    cap();
                    buttresses();
                }
            }
        translate([0,0,-ep])
            crank_cutout();
        bit_hole();
        }
    }
module model_m(){
    difference(){
        union(){
            cup();
            bit_shaft();
            translate([0,0,cup_height])
            intersection(){
                cap();
                buttresses();
            }
        }
        translate([0,0,-ep])
            crank_cutout();
        translate([0,0,cutout_height-2*ep])
            csk_bolt(bolt_diameter,cup_height+buttress_height+bit_height);
    }
}
module bit_shaft(){
    $fn=6;
    translate([0,0,cup_height])
        cylinder(h=bit_height+buttress_height,d=bit_diameter);
}

module bit_hole(){
    $fn=6;
    translate([0,0,cup_height])
        cylinder(h=bit_height+ep,d=bit_diameter*(1+contraction));
}

module crank_cutout(){
    translate([0,cup_diameter/2-2.2*cup_thickness,0])
        scale([1,.4,1])
            cylinder(h=cutout_height+buttress_height+cup_thickness,d=hole_width);
}

module buttresses(){
    for(i=[0:n-1]){
        rotate([0,0,i*360/n])
            translate([cup_diameter/4,0,buttress_height/2])
                cube([cup_diameter/2,buttress_thickness,buttress_height],center=true);
    }
}

module cap(){
    cylinder(h=buttress_height,r1=cup_diameter/2,r2=2);
}

module cup(){
    difference(){
        cylinder(h=cup_height,d=cup_diameter,$fn=100);
        translate([0,0,-ep])
            cylinder(h=cutout_height,d=cup_diameter-2*cup_thickness);
    }
}
```


[User]
Hey, I'm looking to get a massage tool designed, kind of like a rolling pin but with a textured ball in the middle. I have a SCAD file I made already that roughly works, but I want to try to get a more robust, parametrizable version done from scratch, because mine feels a little clunky.

Essentially, it's a central textured ball, and running through it is a rod that acts as a handle, which needs to be able to rotate freely within the ball after printing. So, it's got to be print-in-place. I want to be able to adjust the size of the ball, the length of the rod, and the diameter of the rod. I'd also like to have a parameter to control how far the rod sits inside the ball (ideally a value where 0 means touching the inner cavity and 1 would be in the center.)

The textured ball should have studs or bumps all around it. My current design uses nested loops of rotated, translated spheres, but I'm open to other suggestions. The rod should have some kind of handle on each end. I just scaled down some spheres for my version, but maybe there's a better solution?

I'd like the parameters to be:

*   `roller_size`: The diameter of the main ball.
*   `rod_length`: The overall length of the rod/handle.
*   `rod_diameter`: The diameter of the rod section.
*   `clearance`: A value controlling how far into the ball's cavity the rod is positioned.
* `stud_radius`: Radius of each stud on the ball.
* `stud_spacing`: Angle between studs in degrees.

I'm not sure if this is necessary, but could we also try to use a library for the stud generation, and handle generation? Maybe some kind of sphere offset with a polygon on the outside? I'm not sure what libraries are available but I trust your judgement on that!

[Assistant]
MassageRoller.scad:
```
$fn=100;
// Ball size
roller_size = 25; // [20:34]
// Length of the handheld rod
rod_length = 150; // [80:200]
// Diameter of internal rod
rod_diameter = 15; // [5:20]
// Distance of rod above internal cavity (1 is center, 0 is touching)
clearance = 0.5; // [0:1]

// Create Whole Object
difference(){
    roller(roller_size);                // Studded Ball
    cavity();                           // Internal Cavity
}
translate([0,0,-1+clearance])rod();     // Rolling Rod

// Shape of cavity/crevice inside ball
module cavity(){
    // Cylinder part of cavity
    rotate([90,0,0])translate([0,0,-rod_length/2])cylinder(h=rod_length,d=rod_diameter+2);
    sphere(roller_size-5); // spherical part of cavity
}

// Rolling Rod shape
module rod(){
    sphere(roller_size-7);     // Sphere in center, to hold position
    // Cylinder piece
    rotate([90,0,0])translate([0,0,-rod_length/2])cylinder(h=rod_length,d=rod_diameter);
    // Two handles (scaled/squished spheres)
    translate([0,rod_length/2,0])scale([.3,1,.3])sphere((rod_length+roller_size)/4);
    translate([0,-rod_length/2,0])scale([.3,1,.3])sphere((rod_length+roller_size)/4);
}

module roller(size){
    // The sphere part
    sphere(size,$fn=100);
    // Nested loop to create all of the massaging studs
    for ( j = [0 : 20: 340] ){
        for ( i = [0 : 20: 340] ){
            rotate([i,j,0])translate([0,0,size-1])sphere(size/8,$fn=20);
        }
    }
}
```


[User]
I'd like to create a display model for Cura infill patterns, similar to the one I found on Thingiverse, but I need it to be fully parametric and customizable. I want to be able to easily adjust the base size, the infill cube size and spacing, text size and height, the font, and the density label. I'd like to be able to change the text for the infill types easily, as well, maybe as a list. The specific infills I need are: "Grid", "Lines", "Triangles", "Tri-Hexagon", "Cubic", "Cubic Subdiv.", "Octet", "Quart. Cubic", "Concentric", "Zig Zag", "Cross", "Cross 3D", "Gyroid". I also want to be able to change the density text, "15%", for instance.

The base should be a rounded rectangle and the infill blocks should be rounded cubes. Each infill type will get its own cube, with text labels below each one identifying its infill type. There should also be a title at the top and a density label. The infill pattern blocks should be arranged in a grid. I'd like the title text to be a bit larger than the infill labels and the density text to be somewhat smaller than the title but larger than the infill labels. I'd like the title to say "Cura Infill Patterns" and the density label to say "15% Density", and for both of these to be centered above the blocks.

I'm thinking of using the `minkowski` function to make the rounded cubes and rectangles. I think the `linear_extrude` function will be needed for the text labels. I don't want to have to specify each x and y coordinate for every infill cube, so it'd be great if that logic were automatic based on the number of infills specified in the list.

I don't know what libraries would be best. Please use the most common and easiest to use if there is one available.

[Assistant]
CuraInfillPatterns-v1.0.scad:
```
/* Cura Infill Patterns Display Model
   by Lyl3

Creates a display model for showing the different infill patterns available in Cura, as of version 4.8.

It requires the use of support blockers in Cura in order to modify the infill

This code is published at:
https://www.thingiverse.com/thing:4732170
licensed under the Creative Commons - Attribution - Share Alike license (CC BY-SA 3.0)

V0.1 - basic functioning code
V1.0 - ready for release
*/

/* [Sizing Parameters] */
// Enter the height of the base (mm)
baseHeight = 2;
// Enter the width (X) of the base (mm)
baseX = 126;
// Enter the depth (Y) of the base (mm)
baseY = 78;

// Enter the height of the infill cubes (mm)
infillCubeHgt = 8;
// Enter the width of the infill cubes (mm)
infillCubeSize = 18;
// Enter the spacing between the infill cubes (mm)
iSpacing = 24;

/* [Text Parameters] */
// Enter the text size for the cube labels. Display labels are also sized relative to this parameter.
textSize = 3.5;
// Enter the height of the text for the cube labels (mm)
textHeight = 0.6;
// Enter the height of the text for the display title (mm)
titleHeight = 0.8;
// Enter the height of the text for the density label (mm)
densityLabelHeight = 0.8;
// Enter the font used to create the text
fontName = "Roboto Condensed:style=Bold";
// Enter the text for the density setting
densityText = "15%";
// Enter the list of infill labels
infillText = ["Grid", "Lines", "Triangles", "Tri-Hexagon", "Cubic", "Cubic Subdiv.", "Octet", "Quart. Cubic", "Concentric", "Zig Zag", "Cross", "Cross 3D", "Gyroid"];

/* [Hidden] */
$fn=40;
fudge = 0.01;
// Enter the text size for the display title
titleTextSize = textSize * 1.5;
// Enter the text size for the density label
densityTextSize = textSize * 1.25;

infillX = [-iSpacing*2,-iSpacing,0,iSpacing,iSpacing*2,-iSpacing*2,-iSpacing,0,iSpacing,iSpacing*2,-iSpacing,0,iSpacing];
infillY = [iSpacing,iSpacing,iSpacing,iSpacing,iSpacing,0,0,0,0,0,-iSpacing,-iSpacing,-iSpacing];

translate([0,0,1]) roundedcube(cubeSize = [baseX, baseY, baseHeight], center = true, radius = 0.5);

for (infill=[0:12]) {
  translate([infillX[infill],infillY[infill],baseHeight+infillCubeHgt/2-fudge])
    roundedrectangle(cubeSize = [infillCubeSize, infillCubeSize, infillCubeHgt], center = true, radius = 2);
  translate([infillX[infill],infillY[infill]-infillCubeSize/2-textSize*1.2,baseHeight-fudge])
    linear_extrude(textHeight) text(infillText[infill],halign="center",size=textSize, font=fontName, spacing=1.0,$fn=10);
}

translate([infillX[0],infillY[12]+titleTextSize*0.75,baseHeight-fudge])
    linear_extrude(titleHeight) text("Cura",halign="center",size=titleTextSize, font=fontName, spacing=1.025,$fn=10);
translate([infillX[0],infillY[12]-titleTextSize/2,baseHeight-fudge])
    linear_extrude(titleHeight) text("Infill",halign="center",size=titleTextSize, font=fontName, spacing=1.025,$fn=10);
translate([infillX[0],infillY[12]-titleTextSize*1.75,baseHeight-fudge])
    linear_extrude(titleHeight) text("Patterns",halign="center",size=titleTextSize, font=fontName, spacing=1.025,$fn=10);

translate([infillX[4],infillY[12]+densityTextSize*0.125,baseHeight-fudge])
    linear_extrude(densityLabelHeight) text(densityText,halign="center",size=densityTextSize, font=fontName, spacing=1.025,$fn=10);
translate([infillX[4],infillY[12]-densityTextSize*1.125,baseHeight-fudge])
    linear_extrude(densityLabelHeight) text("Density",halign="center",size=densityTextSize, font=fontName, spacing=1.025,$fn=10);

module roundedcube(cubeSize = [1, 1, 1], center = false, radius = 0.5) {
	// If single value, convert to [x, y, z] vector
	cubeSize = (cubeSize[0] == undef) ? [cubeSize, cubeSize, cubeSize] : cubeSize;

	translate = (center == false) ?
		[radius, radius, radius] :
		[
			radius - (cubeSize[0] / 2),
			radius - (cubeSize[1] / 2),
			radius - (cubeSize[2] / 2)
	];

	translate(v = translate)
	minkowski() {
		cube(size = [
			cubeSize[0] - (radius * 2),
			cubeSize[1] - (radius * 2),
			cubeSize[2] - (radius * 2)
		]);
		sphere(r = radius);
	}
}

module roundedrectangle(cubeSize = [1, 1, 1], center = false, radius = 0.5) {
	// If single value, convert to [x, y, z] vector
	cubeSize = (cubeSize[0] == undef) ? [cubeSize, cubeSize, cubeSize] : cubeSize;
    cylinderHeight = 0.1;

	translate = (center == false) ?
		[radius, radius, 0] :
		[
			radius - (cubeSize[0] / 2),
			radius - (cubeSize[1] / 2),
			-(cubeSize[2] / 2)
	];

	translate(v = translate)
	minkowski() {
		cube(size = [
			cubeSize[0] - (radius * 2),
			cubeSize[1] - (radius * 2),
			cubeSize[2] - cylinderHeight
		]);
		cylinder(h=cylinderHeight, r = radius);
	}
}
```


[User]
I'd like a parametric OpenSCAD design for a simple polaroid picture stand. It should have a trapezoidal base that's extruded along its length, and a slot cut into the top edge for holding the picture.

The key parameters I need are:

*   `stand_len`: The length of the stand, basically the extrusion length of the base.
*   `slot_orientation`: This should be a toggle between 0 and 1. 0 means the slot is tilted forward, and 1 means it's a straight vertical slot.
*   `pic_slot_height`: The height of the picture slot itself.
*  `pic_slot_depth`: The depth of the slot, how far back it goes from the face of the base.
*   `trap_base1_len`: The length of the longer side of the trapezoid base.
*   `trap_base2_len`: The length of the shorter side of the trapezoid base.
*   `trap_height`: The height of the trapezoid.

I'd like the design to have a few built in checks to make sure it makes sense. It should ensure that `trap_base2_len` is smaller than `trap_base1_len`. `pic_slot_height` should also be smaller than `trap_height` and `pic_slot_depth` should be smaller than `trap_base2_len`.

The trapezoid should have points at `[trap_base1_len / 2, 0]`, `[trap_base2_len / 2, trap_height]`, `[-trap_base2_len / 2, trap_height]`, and `[-trap_base1_len / 2, 0]`. I’d like it to use `linear_extrude` to make the base.

I'd also like a `smooth()` module that applies `offset(r=r) offset(r=-r)` to smooth corners, and a `fillet()` module that does the opposite, using `offset(r=-r) offset(r=r)`. The base should be smoothed and filleted.

Finally the picture slot should be positioned based on the trapezoid and then rotated by 20 degrees if `slot_orientation = 0`, otherwise it will remain in a straight cut. I would like the slot itself to be a `cube`. The entire design should be a `difference` between the extruded base and the slot.

I'd like the base to be colored "Khaki", and the slot to be colored "PeachPuff."

I don't think I need any special libraries, just the built-in OpenSCAD functions. I'd also like `$fn = 60` for smooth curves.

[Assistant]
polaroid_stand.scad:
```
// polaroid_stand (c) by tangerine__
// polaroid_stand is licensed under a
// Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.
// You should have received a copy of the license along with this
// work. If not, see <http://creativecommons.org/licenses/by-nc-sa/4.0/>.

//Length of the picture stand
stand_len = 180;

//Picture slot orientation: (0) for tilted, (1) for straight
slot_orientation = 0; //[0, 1]

/* [hidden] */
pic_slot_height = 4;
pic_slot_depth = 1;

trap_base1_len = 15;
trap_base2_len = 10;
trap_height = 10;

$fn = 60;

/* Dimensions check */
assert(trap_base2_len < trap_base1_len, "stand base 2 must be smaller than base 1");
assert(pic_slot_height < trap_height, "pic slot height must be smaller than stand height");
assert(pic_slot_depth < trap_base2_len, "pic slot depth must be smaller than stand base 2");

trap_points = [
    [trap_base1_len / 2, 0],
    [trap_base2_len / 2, trap_height],
    [-trap_base2_len / 2, trap_height],
    [-trap_base1_len / 2, 0]
];

module smooth(r=2)
{
    offset(r=r)
    offset(r=-r)
    children();
}

module fillet(r=2)
{
    offset(r=-r)
    offset(r=r)
    children();
}

module stand_base()
{
    color("Khaki")
    linear_extrude(height = stand_len, center = false)
    smooth()
    fillet()
    polygon(trap_points);
}

module pic_slot()
{
    color("PeachPuff")
    translate([0, trap_height - pic_slot_height, 0])
    if(slot_orientation == 0)
    {
        rotate([0, 0, 20])
        cube([pic_slot_depth, pic_slot_height * 2, stand_len]);
    }
    else
    {
        cube([pic_slot_depth, pic_slot_height, stand_len]);
    }
}

difference()
{
    stand_base();
    pic_slot();
}
```


[User]
I'd like to design a hexagonal plant pot with a removable floor for easy transplanting. The pot and floor should be separate, printable pieces. I want to be able to adjust the pot's overall size, height, wall thickness, and floor thickness. The floor should fit snugly inside the pot with a small tolerance to account for printing variations.

Here are the basic parameters I'm thinking of:

*   **radius:**  The radius of the hexagon (circumradius).
*   **height:** The total height of the pot.
*   **floor_thickness:** The thickness of the removable floor.
*   **wall_thickness:** The thickness of the pot's walls.
*   **rim:** The size of the inset on the bottom of the pot to make room for the floor.
*  **hole_radius**: The radius of the hole in the center of the removable floor.
*   **tolerance:**  A small value to adjust the floor's size for a good fit (i.e. a gap between the floor and the pot).

I'd like two OpenSCAD files: one for the main pot and another for the floor. The main pot should be a hexagonal prism with a hollowed-out center and a small lip at the bottom to hold the floor. The floor should be a slightly smaller hexagon prism with a hole in the middle. It should also be slightly thicker than the rim of the pot. Both files should use parameters for all of the values I mentioned.

I'd also like to use the `regular_shapes.scad` library from MCAD if possible, because that library has the hexagon prism module.

[Assistant]
hexapot_floor.scad:
```
use <MCAD/regular_shapes.scad>

radius = 38;
floor_thickness = 3;
wall_thickness = 3;
hole_radius = 5;
tolerance = 0.3;

difference() {
    hexagon_prism(floor_thickness, radius - wall_thickness - tolerance);
    translate([0,0,-floor_thickness/2])
        hexagon_prism(floor_thickness*2, hole_radius);
}
```
hexapot.scad:
```
use <MCAD/regular_shapes.scad>

radius = 38;
height = 65;
floor_thickness = 3;
rim = 5;
wall_thickness = 3;

difference() {
    hexagon_prism(floor_thickness, radius);
    translate([0,0,-floor_thickness/2])
        hexagon_prism(floor_thickness*2, radius - wall_thickness - rim);
}
hexagon_tube(height - floor_thickness - 0.001, radius, wall_thickness);
```


[User]
Hey, I'm looking to design a case for a TTGO ESP32-OLED-18650 board, specifically the cheap "DollaTek" copy. I want the design to be parametric, so I can easily adjust it later if needed.

I'd like a two-part design: a base case and a lid. The lid should have a groove that fits into the base, providing a secure closure. I'm aiming for a press-fit or snap-fit kind of arrangement. The board should be held in place with distancers and clamp pegs, and there should be space for the OLED screen and the two buttons. I need cutouts for the USB and other ports, plus a slot for a power switch. The board should be held at a certain height from the base. The lid should also have a clip-in feature on one side that goes into the base.

Here are some specific parameters I need to be able to adjust:

*   **Overall Dimensions:** Width, Length, Height of the case.
*   **Wall Thickness:** The thickness of the case walls.
*   **PCB Space:** The space between the board and the lid/base.
*   **PCB Height:** The distance of the board from the bottom of the case.
*   **Distancer Distance:** The distance of the distancers from the corners.
*   **Display Length:** How far the display extends into the case.
*   **Screen Position:** The x and y position of the OLED screen.
*   **Screen Dimensions:** The width and height of the OLED screen cutout.
*   **Button Positions:** X positions for the enable and boot buttons.
*   **Button Radius:** The radius of the button cutouts.
*  **Lid Groove:** Height and Width of the groove on the lid.
*   **Clamp Pegs:** Size of the PCB clamp pegs.
*   **Clip Width, Depth, Height:** Dimensions of the lid clip-in feature.
*   **Lid Extension:** The extension of the lid above the board.
*   **Lid Insets:**  X and Y axis insets for adjusting the lid fit.
*   **PCB Holder Bar:**  Y offset, width, height and length of a bar to help support the pcb.

I'm planning on using the BOSL library, so you can use that in your code. Also, I need to be able to disable the display of the lid, the case, or the PCB independently - I'd also like an option to put the lid on the build plate instead of on top of the case.

I'm thinking of having the main file call a separate file for the PCB model (like in the example I saw), but if you think it's better to put it in the same file, that's fine. I'm open to suggestions if there's a more elegant way to structure this. I do not need the PCB model created as part of this request.

[Assistant]
esp32-oled-18650.scad:
```
// esp32-oled-18650 (c) by Normen Hansen
// v1.0 - initial release
// released under MIT License
// uses the BOSL Library (https://github.com/revarbat/BOSL)
include <BOSL/constants.scad>
use <BOSL/shapes.scad>

use <ttgo18650esp32.scad>

/** VARIABLES **/
// show the lid?
displayLid = true;
// show the case?
displayCase = true;
// show the PCB?
displayPCB = false;
// place the lid on the ground?
laydownLid = true;
// extension for the lid, increase to get more space above the PCB pins
lidextension = 2;
// x-axis inset for lid, increase if lid is too tight, reduce if its too loose
inset = 0.3;
// y-axis inset for lid, increase if lid is bending upwards, reduce if its too loose
insety = 0.6;
inset2 = 2*inset;
insety2 = 2*insety;
// height of the casing, increase if display doesn't fit
height = 26;
// width of the casing, should be okay
width = 34;
// length of the casing, should be okay
length = 120;
// wall thickness, 2mm keeps it stable
walls = 2;
// space for pcb (between lockdowns)
pcbspace = 2;
// pcb level (from z=0)
dheight = 20;
// pcb distancers distance to corner
ddist = 4.2;
// length of the display part
displength = 40;
// x position of screen
screenx=5;
// y position of screen
screeny=31;
// width of screen
screenw=24;
// height of screen
screenh=12;
// y position of buttons
buttony=35;
// x position of enable button
buttonenx=4;
// x position of boot button
buttonbootx=28.5;
// radius of button
buttond=1;
// lid groove height
grheight = 2;
// lid groove width
grwidth = .8;
// clamp down pegs
pegsize = (ddist-walls)*2;
// top side clip-in width
clipwidth = 10;
clipdepth = walls+grwidth+2;
// top side clip-in height
clipheight = 2;
// additional insets for clip hole (clip is inset too)
clipinset = 0.3;
clipinset2 = 2*clipinset;
// PCB holder bar
boff = length-displength; // y offset
// PCB holder bar width
bwidth = 2;
// PCB holder bar height
bheight = 5;
blength = length-boff-walls;

// code to display
if(displayLid){
  if(laydownLid){
  translate([-10,0,height+lidextension]) rotate([0,180,0])
    lid(lidextension);
  } else{
    lid(lidextension);
  }
}
if(displayCase){
  case();
}
if(displayPCB){
  color("blue") translate([2.5,2.5,20]) ttgo18650esp32();
}

// the lid
module lid(extheight = walls){
  // extension height (above board, not display part)
  // lid
  difference(){
    union(){
      // display part
      translate([0,length-displength,height])
        roundedCube(dimensions=[width,displength,walls]);
      // PCB pin box part
      difference(){
        translate([0,0,height])
          roundedCube(dimensions=[width,length-(displength-walls),extheight]);
        translate([0+walls+grwidth+inset,0+walls+grwidth+insety,height-0.1])
          roundedCube(dimensions=[width-(walls*2)-(grwidth*2)-inset2,length-displength-(walls*2)-insety-grwidth,extheight+0.1-walls]);
      }
      // groove (inset offset)
      difference(){
        translate([walls+inset,walls+insety,height-grheight])
          roundedCube(dimensions=[width-(walls*2)-inset2,length-(walls*2)-insety2,grheight]);
        translate([walls+grwidth+inset,walls+grwidth+insety,height-grheight-0.1])
          roundedCube(dimensions=[width-(walls*2)-(grwidth*2)-inset2,length-(walls*2)-(grwidth*2)-insety2,(grheight)+0.2]);
        cutouts();
      }
      // pcb clamp pegs
      translate([walls+inset,walls+insety,dheight+pcbspace])
        roundedCube(dimensions=[pegsize-inset2,pegsize-insety2,height+extheight-dheight-pcbspace]);
      translate([width-walls-pegsize+inset,walls+insety,dheight+pcbspace])
        roundedCube(dimensions=[pegsize-inset2,pegsize-insety2,height+extheight-dheight-pcbspace]);
      translate([walls+inset,length-walls-pegsize+insety,dheight+pcbspace])
        roundedCube(dimensions=[pegsize-inset2,pegsize-insety2,height-dheight-pcbspace]);
      translate([width-walls-pegsize+inset,length-walls-pegsize+insety,dheight+pcbspace])
        roundedCube(dimensions=[pegsize-inset2,pegsize-insety2,height-dheight-pcbspace]);
      // lid clip-in
      translate([(width/2)-(clipwidth/2),length-clipdepth,dheight+pcbspace]) lidClip();
    }
    // display
    translate([screenx,length-screeny,height-0.1])
      cube([screenw,screenh,10]);
    // EN button
    translate([buttonenx,length-buttony,height-0.1])
      cylinder(walls+0.2,buttond,$fn=32);
    // Boot button
    translate([buttonbootx,length-buttony,height-0.1])
      cylinder(walls+0.2,buttond,$fn=32);
    // pcb screw holes
    translate([ddist,ddist,dheight+pcbspace-0.1])
      cylinder(height+extheight,1,$fn=32);
    translate([width-ddist,ddist,dheight+pcbspace-0.1])
      cylinder(height+extheight,1,$fn=32);
    /*translate([ddist,length-ddist,dheight+pcbspace]) cylinder(height,1,$fn=32);
    translate([width-ddist,length-ddist,dheight+pcbspace]) cylinder(height,1,$fn=32);*/
  }
}

// the case (box)
module case(){
  // box
  difference(){
    union(){
      enclosure(width,length,height,walls);
      distancer(ddist,ddist,0,dheight);
      distancer(width - ddist,ddist,0,dheight);
      /*distancer(ddist,length - ddist,0,dheight);
      distancer(width - ddist, length - ddist,0,dheight);*/
      // PCB rails
      translate([walls,boff,dheight]) rotate([0,90,0])
        right_triangle([bheight,blength,bwidth], ORIENT_Y);
      translate([width-walls,boff+blength,dheight]) rotate([0,90,180])
        right_triangle([bheight,blength,bwidth], ORIENT_Y);
    }
    cutouts();
    // lid clip-in (slightly larger)
    translate([(width/2)-(clipwidth/2)-clipinset,length-clipdepth-clipinset,dheight+pcbspace-clipinset])
      cube([clipwidth+clipinset2,clipdepth+clipinset2,clipheight+clipinset2]);
  }
}

// lid clip
module lidClip(){
  rotate([90,0,90])
    linear_extrude(clipwidth)
      polygon([[0,0],
        [clipdepth-walls,0],
        [clipdepth,clipheight/2],
        [clipdepth-walls-insety,clipheight],
        [clipdepth-walls-insety,clipheight+(height-dheight-pcbspace-walls)],
        [0,clipheight+(height-dheight-pcbspace-walls)],
        [0,clipheight]]);
}

// the plug/switch cutouts
module cutouts(){
  translate([-1,7,dheight-1])
    cube([8,12,8]);
  translate([width-7,8.5,dheight+1.5])
    cube([8,10.2,4.6]);
}

// makes the base bottom enclosure
module enclosure(xSize = 25, ySize = 90, zSize = 25, walls = 2){
  difference(){
    roundedCube(dimensions=[xSize,ySize,zSize]);
    translate([walls,walls,walls])
      roundedCube(dimensions=[xSize-(walls*2),ySize-(walls*2),zSize-(walls*1)+0.5]);
  }
}

// places a distancer with a hole
module distancer(posX = 0, posY = 0, posZ = 0, height = 5, baseRadius=2.5, topRadius=2.5, holeRadius=1){
  translate([posX, posY, posZ]) difference() {
    cylinder(r1 = baseRadius, r2 = topRadius, h = height, $fn=32);
    cylinder(r =  holeRadius, h = height+0.5, $fn=32);
  }
}

// rounded cube from aurduino case library
module roundedCube( dimensions = [10,10,10], cornerRadius = 1, faces=32 ) {
	hull() cornerCylinders( dimensions = dimensions, cornerRadius = cornerRadius, faces=faces );
}

module cornerCylinders( dimensions = [10,10,10], cornerRadius = 1, faces=32 ) {
	translate([ cornerRadius, cornerRadius, 0]) {
		cylinder( r = cornerRadius, $fn = faces, h = dimensions[2] );
		translate([dimensions[0] - cornerRadius * 2, 0, 0]) cylinder( r = cornerRadius, $fn = faces, h = dimensions[2] );
		translate([0, dimensions[1] - cornerRadius * 2, 0]) {
			cylinder( r = cornerRadius, $fn = faces, h = dimensions[2] );
			translate([dimensions[0] - cornerRadius * 2, 0, 0]) cylinder( r = cornerRadius, $fn = faces, h = dimensions[2] );
		}
	}
}

```