[User]
Okay, I'm looking to create a customizable lithophane holder, and I'd like it to be parametric so I can adjust it to fit different sized lithophanes. I've seen a design that does something similar, and I'm hoping you can help me create something like it.

The basic idea is a box with a base and a separate top. The lithophane itself will slide into the box, held in place by a lip or border around the inner edge of the box. The specific dimensions of the lithophane should be adjustable. I'll need to specify the lithophane's width, height, and thickness. The border size should be adjustable as well, as that will determine how deep the lithophane sits inside the box.

I'd also like to set the height of the base, the thickness of the floor of the base, and also have a cable hole and space for a jack on the side of the box. I'd need to set the cable diameter, jack width, and jack length as parameters. The base will have four small pillars supporting the upper portion that holds the lithophane. There will also be a cylinder for an LED, whose diameter and thickness should also be adjustable.

The top should also fit over the box base and have cutouts that allow it to snap onto the pillar connections on the base. I'd also like the ability to add text to the top, and ideally, be able to choose whether that text is embossed or filled. If it is filled, the text should be a separate object so that it can be printed in a different color. Also, if filled I would like the text to be rotated 180 degrees horizontally for easier viewing once the part is placed. I'd like to have three lines of text, each with its own parameter to change what is displayed. I'd need to be able to pick the font, too - both Google fonts as well as local fonts would be ideal.

To help with the lid attaching to the base, can you incorporate the "Pin Connectors V2" library by Tony Buser? The library includes modules like `pinhole`, `pin`, and `pintack`. I understand I don't need to attach the files.

Finally, it should be able to output the base only, the top only, both, or just the text. This should be an easily changeable parameter.

Essentially, I need an OpenSCAD file (or maybe a couple of them if that's easier) that lets me set all of these parameters and generate the STL files I need. The core idea is a parametric lithophane holder with text, cable access, and a snap-on lid.

[Assistant]
litho-v2.5.scad:
```
// Params
//Litho-v2.5
//By T. Vogl  (trv)
//2.3: First published.
//2.4: Added alignment pins on base and top.
//   : Changed valid base sizes (min 5).
//   : Added option to fill text - generates text object.
//   : Reduced emboss text depth to 0.6.
//   : Rotated text on top to align with "front" panel (cosmetic only)

// Using the library:
//      Pin Connectors V2
//      BY: Tony Buser <tbuser@gmail.com>

//Select part to generate
part = "both"; // [first:Base Only,second:Top Only,text:Fill Text (use with 'Top Only'),both:All]

//Lithopane Width
lithw = 100;    //[65:1:200]

//Lithopane Heigth
lithh = 72;   //[65:1:200]

//Lithopane Depth (thickness)
lithd = 4;      //[0:.1:10]

//Lithopane Border size (determines inset depth)
lithb = 2;      //[1:.1:8]

//Heigth of base
baseh = 10;     //[5:1:20]

//thickness of 'floor'
floorh = 5;     //[1:.1:10]

//Cable Diameter
cablediameter = 4.2;    //[2:.1:6]

//width of jack cutout
jackw = 5.6;  //[0:.1:10]

//length of jackcutout
jackl = 13.1;  //[0:.1:20]

//diameter of LED cylinder
cylr=18;   //[0:1:80]

//thickness of LED cylinder
cylrthick=2;    //[0.2:.1:40]

//Emboss or fill Text?
textmode = "emboss"; //[emboss,fill]

//Text for Area A
texta = "John & Jane";

//Text for Area B
textb = "Married";

//Text for Area C
textc = "July 17, 2019";

//Font for text on lid.  Use any OpenSCAD or Google Font.  (fonts.google.com)
fontname = "Liberation Sans";

//Real constants
buffer=0+1.4;
smidge = 0+.01;
lipsize = 0+2;
textdepth = 0+ 0.6;
pinh = 0+5;
pinr = 0+2.5;
pint = 0+0.3;

//use <lib_pins.scad>
//-----------------------------------
//-----------------------------------
// Pin Connectors V2
// Tony Buser <tbuser@gmail.com>
module pinhole(h=10, r=4, lh=3, lt=1, t=0.3, tight=true) {
  // h = shaft height
  // r = shaft radius
  // lh = lip height
  // lt = lip thickness
  // t = tolerance
  // tight = set to false if you want a joint that spins easily

  union() {
    pin_solid(h, r+(t/2), lh, lt);
    cylinder(h=h+0.2, r=r);
    // widen the cylinder slightly
    // cylinder(h=h+0.2, r=r+(t-0.2/2));
    if (tight == false) {
      cylinder(h=h+0.2, r=r+(t/2)+0.25);
    }
    // widen the entrance hole to make insertion easier
    translate([0, 0, -0.1]) cylinder(h=lh/3, r2=r, r1=r+(t/2)+(lt/2));
  }
}

module pin(h=10, r=4, lh=3, lt=1, side=false) {
  // h = shaft height
  // r = shaft radius
  // lh = lip height
  // lt = lip thickness
  // side = set to true if you want it printed horizontally

  if (side) {
    pin_horizontal(h, r, lh, lt);
  } else {
    pin_vertical(h, r, lh, lt);
  }
}

module pintack(h=10, r=4, lh=3, lt=1, bh=3, br=8.75) {
  // bh = base_height
  // br = base_radius

  union() {
    cylinder(h=bh, r=br);
    translate([0, 0, bh]) pin(h, r, lh, lt);
  }
}

module pinpeg(h=20, r=4, lh=3, lt=1) {
  union() {
    translate([0, -h/4+0.05, 0]) pin(h/2+0.1, r, lh, lt, side=true);
    translate([0, h/4-0.05, 0]) rotate([0, 0, 180]) pin(h/2+0.1, r, lh, lt, side=true);
  }
}

// just call pin instead, I made this module because it was easier to do the rotation option this way
// since openscad complains of recursion if I did it all in one module
module pin_vertical(h=10, r=4, lh=3, lt=1) {
  // h = shaft height
  // r = shaft radius
  // lh = lip height
  // lt = lip thickness

  difference() {
    pin_solid(h, r, lh, lt);

    // center cut
    translate([-r*0.5/2, -(r*2+lt*2)/2, h/4]) cube([r*0.5, r*2+lt*2, h]);
    translate([0, 0, h/4]) cylinder(h=h+lh, r=r/2.5, $fn=20);
    // center curve
    // translate([0, 0, h/4]) rotate([90, 0, 0]) cylinder(h=r*2, r=r*0.5/2, center=true, $fn=20);

    // side cuts
    translate([-r*2, -lt-r*1.125, -1]) cube([r*4, lt*2, h+2]);
    translate([-r*2, -lt+r*1.125, -1]) cube([r*4, lt*2, h+2]);
  }
}

// call pin with side=true instead of this
module pin_horizontal(h=10, r=4, lh=3, lt=1) {
  // h = shaft height
  // r = shaft radius
  // lh = lip height
  // lt = lip thickness
  translate([0, h/2, r*1.125-lt]) rotate([90, 0, 0]) pin_vertical(h, r, lh, lt);
}

// this is mainly to make the pinhole module easier
module pin_solid(h=10, r=4, lh=3, lt=1) {
  union() {
    // shaft
    cylinder(h=h-lh, r=r, $fn=30);
    // lip
    // translate([0, 0, h-lh]) cylinder(h=lh*0.25, r1=r, r2=r+(lt/2), $fn=30);
    // translate([0, 0, h-lh+lh*0.25]) cylinder(h=lh*0.25, r2=r, r1=r+(lt/2), $fn=30);
    // translate([0, 0, h-lh+lh*0.50]) cylinder(h=lh*0.50, r1=r, r2=r-(lt/2), $fn=30);

    // translate([0, 0, h-lh]) cylinder(h=lh*0.50, r1=r, r2=r+(lt/2), $fn=30);
    // translate([0, 0, h-lh+lh*0.50]) cylinder(h=lh*0.50, r1=r+(lt/2), r2=r-(lt/3), $fn=30);

    translate([0, 0, h-lh]) cylinder(h=lh*0.25, r1=r, r2=r+(lt/2), $fn=30);
    translate([0, 0, h-lh+lh*0.25]) cylinder(h=lh*0.25, r=r+(lt/2), $fn=30);
    translate([0, 0, h-lh+lh*0.50]) cylinder(h=lh*0.50, r1=r+(lt/2), r2=r-(lt/2), $fn=30);

    // translate([0, 0, h-lh]) cylinder(h=lh, r1=r+(lt/2), r2=1, $fn=30);
    // translate([0, 0, h-lh-lt/2]) cylinder(h=lt/2, r1=r, r2=r+(lt/2), $fn=30);
  }
}

//-----------------------------------
//   END OF THIRD PARTY LIBRARY
//-----------------------------------

cubeadj = ((lithd*2)+(4*lipsize));
adj=((lipsize)*4)+(2*lithd);

module cone(){
    //color("red") cylinder(h = 4, r1 = (lipsize+adj/2)/3, r2 = 1, center = true/false);
    color("red") pin(h=pinh,r=pinr);
}

module pillers(){
  //pwidth = lipsize+((lithw+adj)-lithw)/2;
  pwidth = lipsize+adj/2;
  trans = ((lithw+adj)/2)-(pwidth/2);
  pillerh = baseh+lithh-(lithb*2);
  translate([trans,trans,pillerh/2]) color("cyan") cube([pwidth,pwidth,pillerh],true);
  translate([-trans,trans,pillerh/2]) color("cyan") cube([pwidth,pwidth,pillerh],true);
  translate([trans,-trans,pillerh/2]) color("cyan") cube([pwidth,pwidth,pillerh],true);
  translate([-trans,-trans,pillerh/2]) color("cyan") cube([pwidth,pwidth,pillerh],true);

  ts = (lithw)/2 + (.5*sin(45)*(lipsize+(adj/2)));
  translate([ts,ts,pillerh])   rotate(a=45, v=[0,0,1]) cone();
  translate([-ts,ts,pillerh])  rotate(a=-45,v=[0,0,1]) cone();
  translate([ts,-ts,pillerh])  rotate(a=-45,v=[0,0,1]) cone();
  translate([-ts,-ts,pillerh]) rotate(a=45, v=[0,0,1]) cone();
}

module base2(bw,bl,bh){
    difference(){
        translate([-bw/2,-bl/2,0]) cube([bw,bl,bh],false);
        translate([-(bw-cubeadj)/2,-(bl-cubeadj)/2,floorh
        +0.1]) cube([bw-cubeadj,bl-cubeadj,bh-floorh], false);
    }
}

module panels(pw,ph,pd,factor,fortop) {
    translate([0,(lithw/2)+(pd/2)+factor,baseh+(ph/2)-lithb]) color("red") rotate ([90,0,0]) cube([pw,ph,pd],true);

    translate([0,-((lithw/2)+(pd/2)+factor),baseh+(ph/2)-lithb]) color("green") rotate ([90,0,0]) cube([pw,ph,pd],true);
    // switch panel location for accurate color representation only (no impact on real model)
    if (fortop) {
        translate([0,(lithw/2)+(pd/2)+factor,baseh+(ph/2)-(lithb+.5)]) color("yellow") rotate ([90,0,0]) cube([pw,ph,pd],true);

        translate([0,-((lithw/2)+(pd/2)+factor),baseh+(ph/2)-(lithb+.5)]) color("green") rotate ([90,0,0]) cube([pw,ph,pd],true);
        translate([((lithw/2)+(pd/2)+factor),0,baseh+(ph/2)-(lithb+.5)]) color("blue") rotate ([90,0,90]) cube([pw,ph,pd],true);

        translate([-((lithw/2)+(pd/2)+factor),0,baseh+(ph/2)-(lithb+.5)]) color("black") rotate ([90,0,90]) cube([pw,ph,pd],true);
    } else {
        translate([0,(lithw/2)+(pd/2)+factor,baseh+(ph/2)-lithb]) color("yellow") rotate ([90,0,0]) cube([pw,ph,pd],true);
        translate([0,-((lithw/2)+(pd/2)+factor),baseh+(ph/2)-lithb]) color("green") rotate ([90,0,0]) cube([pw,ph,pd],true);

        // switch panel location for accurate color representation only (no impact on real model)
        translate([-((lithw/2)+(pd/2)+factor),0,baseh+(ph/2)-lithb]) color("blue") rotate ([90,0,90]) cube([pw,ph,pd],true);

        translate([((lithw/2)+(pd/2)+factor),0,baseh+(ph/2)-lithb]) color("black") rotate ([90,0,90]) cube([pw,ph,pd],true);
    }
}

module tube(fortop){
    ch = lithh+baseh-lithb;
    cradius = min(cylr,(lithw/2));
    if (fortop) {
        translate([0,0,(ch/2)]) cylinder(h=ch,r=cradius+0.2,center=true);
    } else {
    difference(){
        translate([0,0,(ch/2)]) cylinder(h=ch,r=cradius,center=true);
        translate([0,0,(ch/2)]) cylinder(h=ch+.1,r=max(0,cradius-cylrthick),center=true);

    }
}
}

module jack(){
   // translate([lithw/2+(lipsize*2),0,(cablediameter/2)+((baseh-cablediameter)/2)]) rotate([0,90,0]) color("red") cylinder(h=(lithw/2+adj+.2),r=cablediameter/2,center=true);

    hull(){
    translate([((lithw/2+adj+.2)/2)+cylr,0,cablediameter/2]) rotate([0,90,0]) color("red") cylinder(h=(lithw/2+adj+.2),r=cablediameter/2,center=true);

    translate([((lithw/2+adj+.2)/2)+cylr,0,-cablediameter/2]) rotate([0,90,0]) color("red") cylinder(h=(lithw/2+adj+.2),r=cablediameter/2,center=true);
    };

    //translate([(lithw/2+adj+.2)/2,0,cablediameter/2])     rotate([0,90,0]) cube([cablediameter/2,cablediameter,(lithw/2+adj+.2)],true);

    translate([cylr+jackw/2,0,0])  cube([jackw,jackl,lithh],true);

    //cylinder(h=lithh,r=jacksize,center=true);

}

//Main
module bottom(){
        adj=((lipsize)*4)+(2*lithd);

        difference(){
            union(){
                // base & pillars
                base2(lithw+adj,lithw+adj,max(baseh,floorh));
                translate([0,0,0]) pillers();
                tube(false);
            };
            // subtract out the panels
            panels(lithw+0.4,lithh,lithd+0.4,buffer,false);
            //subtract out the cable channel and plug path
            jack();
            //translate([0,0,0]) rotate(a=90,v=[0,0,1])
            rotate(a=90,v=[0,0,1]) rotate(a=180,v=[0,1,0]) translate([lithw/2,-lithw/2,-0.59]) color("red") linear_extrude(height=0.6) signature();
        };

        //test lithopane
        //translate([0,0,0]) panels(lithw+0.4,lithh,lithd+0.4,buffer, false);

        // subtract out the jack space
    }

module top(){
     //slicers seem to work better if top has holes either way

    trans2 = (lithw)/2 + (.5*sin(45)*(lipsize+(adj/2)));

     difference(){

                base2(lithw+adj,lithw+adj,max(baseh,floorh));
                translate([trans2,trans2,max(baseh,floorh)-pinh]) color("red") pinhole(h=pinh, r=pinr, t=pint, tight=false);

                translate([-trans2,trans2,max(baseh,floorh)-pinh]) color("red") pinhole(h=pinh, r=pinr, t=pint, tight=false);

                translate([trans2,-trans2,max(baseh,floorh)-pinh]) color("red") pinhole(h=pinh, r=pinr, t=pint, tight=false);

                translate([-trans2,-trans2,max(baseh,floorh)-pinh]) color("red") pinhole(h=pinh, r=pinr, t=pint, tight=false);

         //translate([0,0,(2*baseh)+lithh-(lithb*2)+0.1]) rotate(a=180,v=[0,1,0]) pillers();
                //translate([0,0,lithb]) tube(true);
                panels(lithw+0.4,lithh,lithd+0.4,buffer,true);
                placetext();
        };

     //test lithopane
     //translate([lithw*1.5,0,0]) panels(lithw+0.4,lithh,lithd+0.4,buffer, true);
}

module placetext(){
    translate([0,0,(textdepth-0.03)]) rotate(a=90,v=[0,0,1]) rotate(a=180,v=[0,1,0]) color("red") linear_extrude(height=textdepth) mtext();
}

module mtext(){
 translate([0,20,0]) text(texta, halign="center", font=fontname);
 translate([0,0,0])  text(textb, halign="center", font=fontname);
 translate([0,-20,0]) text(textc, halign="center", font=fontname);
}

module signature(){
   translate([0,0,0]) text("trv", halign="center", font="Liberation Sans:style=italic", size=6);
}

module print_part(){
    	if (part == "first") {
		bottom();
	} else if (part == "second") {
		top();
	} else if (part == "both") {
		bottom();
        translate([lithw*1.5,0,0]) top();
        if (textmode=="fill") {translate([lithw*3,0,0]) placetext();}
    } else if (part=="text"){
        placetext();
	} else {
		bottom();
        translate([lithw*1.5,0,0]) top();
        if (textmode=="fill") {translate([lithw*3,0,0]) placetext();}
	}
}

print_part();

```


[User]
Hi! I'm looking to get an OpenSCAD design for a dial indicator mount for a CNC router. I want it to be parametric, so I can adjust it for different routers. I've got some notes here on the basic design:

The mount will essentially be a ring that clamps around the router body with a couple of bolt-on tabs, and then another set of tabs perpendicular to those to mount the dial indicator.

Here are the key parameters that I think we need:
*   `inner_dia`: The diameter of the router body.
*   `ring_wall_thickness`: The thickness of the material used for the mounting ring.
*   `ring_height`: The height of the mounting ring.
*   `ring_gap`: The width of the gap in the ring (to allow tightening).
*   `tab_wall_thickness`: The thickness of the bolt tabs where bolts pass through.
*   `tab_length`: The length of the bolt tabs, measured from the inner diameter of the ring.
*   `bolt_dia`: The diameter of the bolts used.
*   `bolt_head_pt_to_pt`: The point-to-point measurement of the bolt head.
*   `gauge_tab_gap`: The gap between the mounting tabs for the dial indicator.

The ring itself should be a cylinder with a gap cut into it. The tabs should be essentially rectangular "tombstone" shapes with holes for the bolts to pass through, and bolt head recesses for the tightening tabs. Two of these tabs should be on opposite sides of the ring's gap, pointing outwards to allow for tightening, and the other two should be pointing perpendicular to those, to mount the dial indicator.

The "tombstone" shape is a rectangle with a rounded end and is described in the provided code. We should include that in the design.

Could you generate the necessary OpenSCAD file(s) to handle all of this? I don't have any specific preferences on library usage but if there are any libraries that will help create shapes (like the rounded end on the tab), feel free to use them!

[Assistant]
Bosch_Router_Dial_Gauge_Mount_V3.scad:
```
/************** BEST VIEWED IN A CODE EDITOR 80 COLUMNS WIDE *******************
*
* Bosch Router Dial Gauge Mount
* Benjamen Johnson <workshop.electronsmith.com>
* 20190712
* Version 3
* openSCAD Version:2015.03-2
*******************************************************************************/
// Diameter of the router body
inner_dia = 71;

// Wall thickness of the mounting ring
ring_wall_thickness = 7;

// Height of the entire mount
ring_height = 15;

// Width of the gap in the ring
ring_gap = 10;

// Thickness of bolt tabs (You want enough meat to bury the bolt head)
tab_wall_thickness = 10;

// Length of bolt tabs (measured from inner diameter of ring)
tab_length = 35;

// Diameter of the bolt shaft
bolt_dia = 7;

// Bolt head point to point measurement
bolt_head_pt_to_pt = 12.8;

// Thickness of the mounting tab on the gauge
gauge_tab_gap = 6.5;

// Calculate the outer diameter of the ring
outer_dia = inner_dia+2*ring_wall_thickness;

union(){
    // make the notched ring
    linear_extrude(height = ring_height, center=true, convexity=10,$fn=200)
        difference(){
            circle(d=outer_dia,center=true);
            circle(d=inner_dia,center=true);
            translate([(inner_dia+ring_wall_thickness)/2,0])square([inner_dia/2, ring_gap],center=true);
        } //end difference

    //make tabs for tightening
    translate([(inner_dia+tab_length)/2,(ring_gap+tab_wall_thickness)/2])tab(nut=true);
    translate([(inner_dia+tab_length)/2,-(ring_gap+tab_wall_thickness)/2])tab(nut=false);

    //make tabs for gauge mount
    translate([(gauge_tab_gap+tab_wall_thickness)/2,-(inner_dia+tab_length)/2]) rotate([0,0,-90])tab(nut=true);
    translate([-(gauge_tab_gap+tab_wall_thickness)/2,-(inner_dia+tab_length)/2]) rotate([0,0,-90]) tab(nut=false);
}// end union

module tab(nut){
    difference(){
        tombstone(tab_length, tab_wall_thickness,ring_height);
        translate([tab_length/2-bolt_head_pt_to_pt/2-2,0])rotate([90,0,0])cylinder(d=bolt_dia, h=tab_wall_thickness*2,center=true,$fn=50);
        if (nut)
            translate([tab_length/2-bolt_head_pt_to_pt/2-2,tab_wall_thickness/2,0])rotate([90,0,0])cylinder(d=bolt_head_pt_to_pt, h=tab_wall_thickness,center=true,$fn=6);
    } //end difference
} // end module

// module for making the tombstone shape (rectangle with rounded end)
module tombstone(l,w,h){
    union(){
        translate([-h/4,0,0])cube([l-h/2, w, h],center=true);
        translate([(l-h)/2,0,0])rotate([90,0,0])cylinder(d=h,h=w,center=true,$fn=100);
    } //end union
} // end module

```


[User]
I'd like to design a customizable speaker stand using OpenSCAD. I want to be able to control several parameters, such as the overall size of the base (width and depth), the thickness of the base, the radius and height of the support poles, and whether or not the base has a center cutout. The idea is to have a stand that consists of a top and bottom piece which are the same, and four cylindrical legs.

I need the design to be parametric so I can adjust these settings easily. Specifically, I need the following configurable parameters:

*   `base_width`: The width of the base/top (x-axis).
*   `base_depth`: The length of the base/top (y-axis).
*  `base_height`: The thickness of the base/top (z-axis).
*   `1_Solid_2_Cutout`: An option to choose whether the base/top should be solid (1) or have a center cutout (2).
*   `support_pole_radius`: The radius of the cylindrical support poles.
*   `support_pole_height`: The height of the support poles.
*   `1_base_2_poles`: A flag to select whether to print the base/top (1) or the support poles (2). When set to 1, it should only generate the base with the pole cutouts. When set to 2, it should print the 4 support poles.

The base/top should have rounded corners. I've used the `minkowski()` function with a cylinder to achieve this in the past, but I'm open to other methods.

Also, I'd prefer that the cutouts for the support poles have a slight tolerance built-in so they aren't an exact fit. Something like adding 0.1mm to the radius of the cutout cylinder should work. The cylinders extending out of the base for the support poles need to be slightly larger, maybe 4mm.

It would be ideal if the code was well-organized and easy to understand, maybe with comments explaining the different parts, if that's not too much to ask.

[Assistant]
SpeakerStand_v2.scad:
```
// Adjustable speaker stand version 2
// Brian Blankenship 7/22/2023

// number of fragments (higher = better quality)
$fn=128;

// Set to 1 and it prints the base/top which you will need to print twice. Set to 2 for printing the support poles.
1_base_2_poles = 1; //[1:1:2]

// Set the width (x axis) of the base/top
base_width = 240;  // [100:1:1000]

// Set the length (y axis) of the base/top
base_depth = 200; // [100:1:1000]

// set how thick to make the base/top in milimeters
base_height = 3; //  [3:1:25]

// Cut-out the center of the base/top?
1_Solid_2_Cutout = 2; // [1:1:2]

// set the radius of the support poles. This needs to be the same value for when printing the base/top and support poles.
support_pole_radius = 25; // [15:1:50]

// Height of the support poles. Probably needs to be 1mm less than the max build height of your printer.
support_pole_height = 210; // [30::1:500]

// Compensate for additional size minkowki rounding adds to specified dimentions
base_width_a = base_width - 14;
base_depth_a = base_depth - 14;

// x offset - leave at default of 7, this just helped verify dimentions during design
xo = 7;
// y offset, leave at default of 7, same as above
yo = 7;

if(1_base_2_poles==1) {
    difference() {

        // additons to the print
        union() {

              // base with rounded corners
             minkowski()
                {
                     translate([xo,yo,0]) cube([base_width_a,base_depth_a,base_height / 2]);
                    cylinder(r=7,h=base_height / 2);
                }

            translate([support_pole_radius + xo, base_depth_a - support_pole_radius + yo, base_height]) cylinder(h= 12 + base_height, r = support_pole_radius + 4);
            translate([base_width_a - support_pole_radius + xo, support_pole_radius + yo, base_height]) cylinder(h= 12 + base_height, r = support_pole_radius + 4);
            translate([support_pole_radius + xo, support_pole_radius + yo, base_height]) cylinder(h= 12 + base_height, r = support_pole_radius + 4);
            translate([base_width_a - support_pole_radius + xo,base_depth_a - support_pole_radius + yo, base_height]) cylinder(h = 12 + base_height,r =support_pole_radius + 4);
        }

        // subtracts
        union() {

            // cutout of center base/top
            if(1_Solid_2_Cutout==2) {
                minkowski()
                    {
                        translate([support_pole_radius * 2 + 4 + xo,support_pole_radius  * 2 + 4 + yo,0]) cube([base_width_a - (support_pole_radius * 4) - 8,base_depth_a - support_pole_radius * 4  - 8 ,base_height / 2]);
                        cylinder(r=7,h=base_height / 2 + 2);
                    }
                }

            // pole cutouts
            translate([support_pole_radius + xo, base_depth_a - support_pole_radius + yo, base_height]) cylinder(h= 12 + base_height + 1, r = support_pole_radius + .1);
            translate([base_width_a - support_pole_radius + xo, support_pole_radius + yo, base_height]) cylinder(h= 12 + base_height + 1, r = support_pole_radius + .1);
            translate([support_pole_radius + xo, support_pole_radius + yo, base_height]) cylinder(h= 12 + base_height + 1, r = support_pole_radius + .1);
            translate([base_width_a - support_pole_radius + xo,base_depth_a - support_pole_radius + yo, base_height + 1]) cylinder(h = 12 + base_height + 1,r =support_pole_radius + .1);
        }
    }
}
else
{
    // print support poles
    #translate([0,0,0]) cylinder(support_pole_height,r=support_pole_radius);
    #translate([support_pole_radius * 2 + 5,0,0]) cylinder(support_pole_height,r=support_pole_radius);
    #translate([0,support_pole_radius * 2 + 5,0]) cylinder(support_pole_height,r=support_pole_radius);
    #translate([support_pole_radius * 2 + 5,support_pole_radius * 2 + 5,0]) cylinder(support_pole_height,r=support_pole_radius);
}
```
240mm_poles.scad:
```
// Adjustable speaker stand version 2
// Brian Blankenship 6/25/2023
// Easiest way is to modify is to use the customizer in OpenSCAD, or on Thingiverse, or you can modify the values below manually in the openSCAD code.

// number of fragments (higher = better quality)
$fn=128;
// Set to 1 and it prints the base/top which you will need to print twice. Set to 2 for printing the support poles.
1_base_2_poles = 1; //[1:1:2]

// Set the width (x axis) of the base/top
base_width = 210;  // [100:1:1000]

// Set the length (y axis) of the base/top
base_depth = 210; // [100:1:1000]

// set how thick to make the base/top in milimeters
base_height = 3; //  [3:1:25]

// Cut-out the center of the base/top?
1_Solid_2_Cutout = 2; // [1:1:2]

// set the radius of the support poles. This needs to be the same value for when printing the base/top and support poles.
support_pole_radius = 22; // [15:1:50]

// Height of the support poles. Probably needs to be 1mm less than the max build height of your printer.
support_pole_height = 209; // [30::1:500]

// Compensate for additional size minkowki rounding adds to specified dimentions
base_width_a = base_width - 14;
base_depth_a = base_depth - 14;

// x offset - leave at default of 7, this just helped verify dimentions during design
xo = 7;
// y offset, leave at default of 7, same as above
yo = 7;

if(1_base_2_poles==1) {
    difference() {

        // additons to the print
        union() {

              // base with rounded corners
             minkowski()
                {
                     translate([xo,yo,0]) cube([base_width_a,base_depth_a,base_height / 2]);
                    cylinder(r=7,h=base_height / 2);
                }

            translate([support_pole_radius + xo, base_depth_a - support_pole_radius + yo, base_height]) cylinder(h= 12 + base_height, r = support_pole_radius + 4);
            translate([base_width_a - support_pole_radius + xo, support_pole_radius + yo, base_height]) cylinder(h= 12 + base_height, r = support_pole_radius + 4);
            translate([support_pole_radius + xo, support_pole_radius + yo, base_height]) cylinder(h= 12 + base_height, r = support_pole_radius + 4);
            translate([base_width_a - support_pole_radius + xo,base_depth_a - support_pole_radius + yo, base_height]) cylinder(h = 12 + base_height,r =support_pole_radius + 4);
        }

        // subtracts
        union() {

            // cutout of center base/top
            if(1_Solid_2_Cutout==2) {
                minkowski()
                    {
                        translate([support_pole_radius * 2 + 4 + xo,support_pole_radius  * 2 + 4 + yo,0]) cube([base_width_a - (support_pole_radius * 4) - 8,base_depth_a - support_pole_radius * 4  - 8 ,base_height / 2]);
                        cylinder(r=7,h=base_height / 2 + 2);
                    }
                }

            // pole cutouts
            translate([support_pole_radius + xo, base_depth_a - support_pole_radius + yo, base_height]) cylinder(h= 12 + base_height + 1, r = support_pole_radius + .1);
            translate([base_width_a - support_pole_radius + xo, support_pole_radius + yo, base_height]) cylinder(h= 12 + base_height + 1, r = support_pole_radius + .1);
            translate([support_pole_radius + xo, support_pole_radius + yo, base_height]) cylinder(h= 12 + base_height + 1, r = support_pole_radius + .1);
            translate([base_width_a - support_pole_radius + xo,base_depth_a - support_pole_radius + yo, base_height + 1]) cylinder(h = 12 + base_height + 1,r =support_pole_radius + .1);
        }
    }
}
else
{
    // print support poles
    #translate([0,0,0]) cylinder(support_pole_height,r=support_pole_radius);
    #translate([support_pole_radius * 2 + 5,0,0]) cylinder(support_pole_height,r=support_pole_radius);
    #translate([0,support_pole_radius * 2 + 5,0]) cylinder(support_pole_height,r=support_pole_radius);
    #translate([support_pole_radius * 2 + 5,support_pole_radius * 2 + 5,0]) cylinder(support_pole_height,r=support_pole_radius);
}
```


[User]
Hey, I'm looking for help generating jigsaw puzzles in OpenSCAD, and I have a specific design in mind based on this existing project. I'd like a parametric design that I can customize. Basically, I need a script that generates a puzzle with interlocking pieces using bezier curves for the puzzle tabs and slots. I'm not looking to just reuse the old code, but would like something inspired by that.

Here are the key features I'm looking for:

*   **Parametric Piece Size:** I need to be able to easily adjust the size of each puzzle piece (e.g., 20mm, 30mm, etc.)
*   **Parametric Puzzle Dimensions:** I need to specify the number of rows and columns of the puzzle, allowing me to make different puzzle shapes (e.g., 5x6, 7x7, etc.)
*   **Parametric Gap Between Pieces:** I need to control the gap, or the space between the puzzle pieces, as I need to account for a laser cutting kerf.
*   **Overall Height:** I want to control the thickness of the puzzle pieces.
*   **Bezier Tab & Slot Generation:** The puzzle edges should be created using bezier curves, and the exact curve should be generated randomly.
*   **Repeatable Randomness:** I need to be able to use a random seed, so I can generate different, but repeatable, puzzles by using different seed values.
*   **Frame:** The puzzle should have a frame that goes around the outside.
*   **No external Libraries**: I don't want to use external libraries. It should be able to be self-contained.

Can you create the necessary OpenSCAD file(s) for this? This is for my own personal use, so I'm looking for good code that's not too complex.

[Assistant]
jigsaw_generator.scad:
```
/*
 * =====================================
 *   This is public Domain Code
 *   Contributed by: Gael Lafond
 *   20 July 2019
 * =====================================
 *
 * Jigsaw puzzle piece cutter generator.
 * Inspired from:
 *     https://www.thingiverse.com/thing:490384
 *
 * Unit: millimetres.
 */

// Precision
$fn = 10;

// Random seed, for repeatable results. Change the number to get a different puzzle.
random_seed = 42; // [0:100]

// Size of the puzzle pieces, in mm
piece_size = 20; // [10:100]

// Space between puzzle pieces
thickness = 0.2; // [0.1:0.1:2]

// Number of rows
rows = 5; // [1:10]

// Number of columns
columns = 6; // [1:10]

// Height of the puzzle, in mm
height = 10;

linear_extrude(height) {
	puzzle(random_seed);
}

module puzzle(seed) {
	// Frame
	difference() {
		translate([-thickness, -thickness]) {
			square([
				piece_size * columns + thickness*2,
				piece_size * rows + thickness*2,
			]);
		}
		square([
			piece_size * columns,
			piece_size * rows,
		]);
	}

	if (rows > 1) {
		for (row = [1 : rows-1]) {
			translate([0, piece_size * row]) {
				puzzle_row(seed + row);
			}
		}
	}

	if (columns > 1) {
		for (column = [1 : columns-1]) {
			translate([piece_size * column, 0]) {
				puzzle_column(seed + rows + column);
			}
		}
	}
}

module puzzle_row(seed) {
	side_random_vect=rands(0, 1, columns, seed);
	flip_random_vect=rands(0, 1, columns, seed+1);

	for (index = [0 : columns-1]) {
		translate([piece_size * index, 0]) {
			mirror([0, flip_random_vect[index] > 0.5 ? 1 : 0]) {
				puzzle_side(piece_size, side_random_vect[index] * 1000);
			}
		}
	}
}

module puzzle_column(seed) {
	side_random_vect=rands(0, 1, rows, seed);
	flip_random_vect=rands(0, 1, rows, seed+1);

	for (index = [0 : rows-1]) {
		translate([0, piece_size * index]) {
			rotate([0, 0, 90]) {
				mirror([0, flip_random_vect[index] > 0.5 ? 1 : 0]) {
					puzzle_side(piece_size, side_random_vect[index] * 1000);
				}
			}
		}
	}
}

module puzzle_side(s, seed) {
	random_vect=rands(0, 1, 6, seed);

	_h = random_vect[0] * 0.2;  // height [0, 0.2]
	_t = random_vect[1] * 0.1;  // top [0, 0.1]
	_rh = random_vect[2] * 0.05; // right height [0, 0.05]
	_ro = random_vect[3] * 0.1; // right offset [0, 0.1]
	_lh = random_vect[4] * 0.05; // left height [0, 0.05]
	_lo = random_vect[5] * 0.1; // left offset [0, 0.1]

	bezier_stroke([
		[
			[0, 0],
			[0, 0],
			[(0.45+_ro)*s, (-0.05-_h+_rh)*s],
			[(0.35+_ro)*s, (0.07-_h+_rh)*s]
		],
		[
			[(0.35+_ro)*s, (0.07-_h+_rh)*s],
			[(0.25+_ro)*s, (0.15-_h+_rh)*s],
			[0.40*s, (0.25-_h+_t)*s],
			[0.50*s, (0.25-_h+_t)*s]
		],
		[
			[0.50*s, (0.25-_h+_t)*s],
			[0.60*s, (0.25-_h+_t)*s],
			[(0.75-_lo)*s, (0.15-_h+_lh)*s],
			[(0.65-_lo)*s, (0.07-_h+_lh)*s]
		],
		[
			[(0.65-_lo)*s, (0.07-_h+_lh)*s],
			[(0.55-_lo)*s,  (-0.05-_h+_lh) *s],
			[s, 0],
			[s, 0]
		]
	], thickness);
}

/**
 * Stripped down version of "bezier_v2.scad".
 * For full version, see: https://www.thingiverse.com/thing:2170645
 */

function BEZ03(u) = pow((1-u), 3);
function BEZ13(u) = 3*u*(pow((1-u),2));
function BEZ23(u) = 3*(pow(u,2))*(1-u);
function BEZ33(u) = pow(u,3);

function bezier_2D_point(p0, p1, p2, p3, u) = [
	BEZ03(u)*p0[0]+BEZ13(u)*p1[0]+BEZ23(u)*p2[0]+BEZ33(u)*p3[0],
	BEZ03(u)*p0[1]+BEZ13(u)*p1[1]+BEZ23(u)*p2[1]+BEZ33(u)*p3[1]
];

function bezier_coordinates(points, steps) = [
	for (c = points)
		for (step = [0:steps])
			bezier_2D_point(c[0], c[1], c[2], c[3], step/steps)
];

module bezier_stroke(points, width) {
	steps = $fn <= 0 ? 30 : $fn;
	bezier_points = bezier_coordinates(points, steps);
	for (index = [0 : len(bezier_points) - 2]) {
		hull() {
			translate(bezier_points[index]) circle(d = width);
			translate(bezier_points[index + 1]) circle(d = width);
		}
	}
}

module bezier_polygon(points) {
	steps = $fn <= 0 ? 30 : $fn;
	polygon(bezier_coordinates(points, steps));
}

```


[User]
Hey, I'm looking to design a coin holder, something that's basically a flat card with slots for coins. I want it to be flexible, so I'm thinking TPU. I've got some specific ideas on how it should work, but it needs to be parametric so I can adjust it if I need to for different coins or different materials later on.

Here's what I'm thinking:

*   **Coin Slots:**  I want it to hold two coins per slot, arranged side-by-side. So, for example, one slot would hold two pennies, and another might hold a nickel and a dime. I need to be able to define the diameter and thickness for each coin type. It should have a lip holding the coins in place, not just a hole.
*   **Coin Visibility:**  I want a round window in the face of the card on top of each coin, so that it's easy to see what coin is there.
*   **Inset:** The coins should be recessed into the card a bit; I don't want them sticking out too much. It should be a percentage of the coin diameter, so I can adjust it based on the material; maybe 70% for something soft like TPU.
*   **Card Structure:** The card should have horizontal walls and vertical walls around the coins to keep them secure, and also a border around the outside. I want to be able to control their thickness separately, and the side walls should be a little thicker than the internal horizontal walls.
*   **Dimensions:** The card's overall size should be determined by the coins and the wall thicknesses. The length should be based on how many rows of coins, and the width should be based on the widest coin plus an amount for the wall. I want to be able to specify the thickness of two coins as the slot height
*   **Flexibility:** The card should be designed to bend; since this will be printed in TPU, I am not worried about it breaking.
*   **Corner Radius:** The corners of the card should be rounded with a user-set radius.
*   **Top Surface:** The top of the card can either be a completely flat plane, or a flat plane with a strip down the middle of the top face of the card removed to reduce overhangs.  Ideally the top can also be solid if I have problems printing the cutouts.

For the OpenSCAD implementation, I'd like the parameters to be something like this:

*   `inset`: Percentage of coin diameter to recess into the card (e.g., 70)
*   `windowp`: Percentage of coin diameter for the viewing window (e.g., 85)
*   `toptype`:  Option for top surface. 0 = round, 1 = flat with strip, 2 = solid.
*   `hwall`: Thickness of horizontal walls between coins (e.g., 0.5)
*   `vwall`: Thickness of vertical walls on each side of the coin (e.g., 1.5)
*   `bwall`: Thickness of the border around the outside (e.g., 2)
*    `swall`: Thickness of the side walls (e.g., 2)
*   `sloth`: combined thickness of two coins (e.g., 3.4)
*  `coins`:  A list of lists for each coin, where each list is coin diameters in a pair (e.g. `[[19.2, 24.3], [21.3, 18], [24.3, 19.2]]`)
* `coinh`: list of coin thicknesses corresponding to the list above (e.g. `[[1.5, 1.7], [2, 1.5], [1.7, 1.5]]`)
*   `roundr`: Radius for the rounded corners (e.g., 3)
*   `$fn`:  Resolution for circles and curves, start with 60, but I need to be able to change this later.

I don't need to use any extra libraries for this; I should be able to do everything with the standard OpenSCAD primitives.

Let me know if you need any clarification. Thanks!

[Assistant]
coincard-tpu.scad:
```
// TPU coin card

// percentage inset of coin into card, suggset 60 for hard plastic, 70 for tpu
inset = 70;  // [51:90]
// percentage of coin diameter for viewing window
windowp = 85; // [ 0:95]
// If the top doesn't build right, try making it solid
toptype = 1; // [ 0:round , 1:partial flat, 2:solid ]

// horizontal wall thickness
hwall = 0.5;
// vertical wall thickness
vwall = 1.5;
// border band wall width; suggest 2 for tpu, 0 for hard plastic
bwall = 2;
// side walls need to be a hair thicker than other horizontal walls
swall = 2;

// slot thickness for two of the thickest coin
sloth = 3.4; // 1.7*2; 2 quarters

// coin diameters rounded up for tolerance, 2 columns
coins = [ [ 19.2, 24.3], [21.3, 18], [ 24.3, 19.2 ] ];
// coin thicknesses (rounded up)
coinh = [ [ 1.5, 1.7 ], [ 2, 1.5 ] , [ 1.7, 1.5 ] ];
// penny quarter
// nickle dime
// quarter penny

/* [extras] */
$fn = 60;
roundr = 3;  // round corner radius

function widest(v, i=0, r1=0, r2=0) = i<len(v) ? widest(v,i+1,r1>r2?r1:r2, v[i][0]+v[i][1]) : (r1>r2?r1:r2);

width = widest(coins)* inset/100 + hwall;
height = vwall + sloth + vwall;
height2 = height+sloth*2;

function makeoffsets(v, i=0, off=[swall, swall]) = i<len(v) ? concat( [ off+v[i]*0.5],
    makeoffsets(v,i+1,off+v[i]+[hwall,hwall])) : [off];

offsets = makeoffsets(coins);
echo(offsets);

lengthv = offsets[len(offsets)-1];
length = (lengthv[0]>lengthv[1] ? lengthv[0] : lengthv[1])-hwall+swall;
// center the shorter side
centero = (lengthv[0]>lengthv[1]) ? [ 0, (lengthv[0]-lengthv[1])/2] : [ (lengthv[1]-lengthv[0])/2, 0];

echo("width",width, lengthv, "length",length, len(coins));
echo("centero",centero,lengthv);
echo(coins);

/* [Hidden] */
eps = 0.01;

module roundcorner(x=0,y=0,r=0)
{
    translate([x,y,-eps]) rotate([0,0,r])
    difference() {
        translate([-eps,-eps,0]) cube([roundr+eps, roundr+eps, height+eps*2]);
        translate([roundr,roundr,0]) cylinder(r=roundr, h=height+eps*2);
    }
}

difference() {
    union() {
        difference() {
            cube([width, length, height]);
            // cutouts for coins
            translate([0,0,vwall]) for (i=[0:len(coins)-1]) {
                translate([ coins[i][0]*(inset-50)/100, offsets[i][0]+centero[0], 0]){
                    translate([0,0,sloth-coinh[i][0]*2])
                    cylinder(h=coinh[i][0]*2, d=coins[i][0]);
                    // window
                    translate([0,0,-vwall-0.01])
                    cylinder(h=(toptype==2)?height/2:height2, d=coins[i][0]*windowp/100);
                }
                translate([ width-coins[i][1]*(inset-50)/100, offsets[i][1]+centero[1],0]) {
                    //translate([0,0, sloth-coinh[i][1]*2])
                    cylinder(h=coinh[i][1]*2, d=coins[i][1]);
                    // window
                    translate([0,0,-vwall-0.01])
                    cylinder(h=toptype==2?height/2:height2,  d=coins[i][1]*windowp/100);
               }
            }
        }
        // put back a thin border to hold it together
        difference() {
            union() {
                cube([width, length, vwall]);
                translate([0,0,vwall+sloth]) cube([width, length, vwall]);
            }
            translate([bwall, bwall, -1]) cube([width-bwall*2, length-bwall*2, height+2]);
        }
        // try a strip down the top middle to reduce unprintable overhangs
        if (toptype==1)
            translate([width/3, 0, vwall+sloth]) cube([width/3, length, vwall]);
    }
    // round the corners
    roundcorner();
    roundcorner(width,0,90);
    roundcorner(width, length, 180);
    roundcorner(0,length,-90);
}

```


[User]
I'd like to create a customizable hose adapter for 3D printing, similar to the one described in the provided SCAD file. I need it to be parametric so I can easily change the dimensions. The basic shape is a hollow cylinder with a narrower section on one end, a wider section on the other end, and a middle section connecting them. I'd also like the option of adding barbs/ribs on the outer surface to better grip the tubing.

Here's the key parameters I need to control:

*   **Outer Diameter 1 (bottom):** The outer diameter of the wider end.
*   **Wall Thickness 1 (bottom):** The thickness of the wall at the wider end.
*   **Rib Thickness 1 (bottom):** The size/depth of the barbs/ribs at the wider end. Set to zero for no barbs.
*   **Length 1 (bottom):** The length of the wider section.
*   **Outer Diameter 2 (top):** The outer diameter of the narrower end.
*   **Wall Thickness 2 (top):** The thickness of the wall at the narrower end.
*   **Rib Thickness 2 (top):** The size/depth of the barbs/ribs at the narrower end. Set to zero for no barbs.
*  **Length 2 (top):** The length of the narrower section
*   **Middle Diameter:** The outer diameter of the middle section.
*   **Middle Length:** The length of the middle section.

The barbs should be evenly spaced along the length of their respective sections, maybe three barbs per section. I would also like the inner diameters to be automatically calculated based on the outer diameters and wall thicknesses.

Could you please generate a parametric OpenSCAD file for this? I'm not using any special libraries, just the standard OpenSCAD features.

[Assistant]
Hose_Adaptor.scad:
```
////////////////////////////////////////////////////////
// Created by Paul Tibble - 18/7/19                   //
// https://www.thingiverse.com/Paul_Tibble/about      //
// Please consider tipping, if you find this useful.  //
////////////////////////////////////////////////////////

$fn = 100*1;

//ignore, added to fix a bug, does nothing
ignore = 99;
// Outer Diameter (bottom)
outer_diameter_1 = 15;
// Wall Thickness (bottom)
wall_thickness_1 = 2;
// Rib Thickness (bottom), set to Zero to remove
barb_size_1 = 0.5;
// Length (bottom)
length_1 = 15;
// Outer Diameter (top), should be smaller than or equal to Outer Diameter (bottom)
outer_diameter_2 = 12;
// Wall Thickness (top)
wall_thickness_2 = 1;
// Rib Thickness (top), set to Zero to remove
barb_size_2 = 0.5;
// Length (top)
length_2 = 15;
// Middle Diameter
mid_diameter = 17;
// Middle Length
mid_length = 5;

//do not change these
inner_diameter_1 = outer_diameter_1 - (wall_thickness_1*2);
inner_diameter_2 = outer_diameter_2 - (wall_thickness_2*2);

module create_profile() {
    ////////
    // Middle
    ///////
    polygon(points=[[inner_diameter_1/2,length_1],[mid_diameter/2,length_1],[mid_diameter/2,length_1+mid_length],[inner_diameter_2/2,length_1+mid_length]]);
    //////
    //length 1
    /////
    translate([inner_diameter_1/2,0,0])square([wall_thickness_1,length_1]);
    //barb 1
    translate([outer_diameter_1/2,0,0])polygon(points=[[0,0],[0,(length_1/5)],[barb_size_1,(length_1/5)]]);
    //barb 2
    translate([outer_diameter_1/2,length_1*0.25,0])polygon(points=[[0,0],[0,(length_1/5)],[barb_size_1,(length_1/5)]]);
    //barb 3
    translate([outer_diameter_1/2,length_1*0.5,0])polygon(points=[[0,0],[0,(length_1/5)],[barb_size_1,(length_1/5)]]);
    //////
    //length 2
    /////
    translate([inner_diameter_2/2,length_1+mid_length,0])square([wall_thickness_2,length_2]);
    //rib 1
    translate([outer_diameter_2/2,(length_1+mid_length+length_2),0])polygon(points=[[0,0],[0,-1*(length_2/5)],[barb_size_2,-1*(length_2/5)]]);
    //rib 2
    translate([outer_diameter_2/2,(length_1+mid_length+length_2)-length_2*0.25,0])polygon(points=[[0,0],[0,-1*(length_2/5)],[barb_size_2,-1*(length_2/5)]]);
    //rib 3
    translate([outer_diameter_2/2,(length_1+mid_length+length_2)-length_2*0.5,0])polygon(points=[[0,0],[0,-1*(length_2/5)],[barb_size_2,-1*(length_2/5)]]);
}

rotate_extrude(angle = 360, convexity = 10) create_profile();
//create_profile();
```


[User]
Okay, I'm looking to create some 3D printable bases for LED-backlit acrylic signs, and I'd like to be able to customize them pretty thoroughly. I've seen some examples that look like they would work well, but I need something that's fully parametric.

Specifically, I need to be able to adjust the following:

*   **Acrylic Thickness:** This will obviously vary based on the specific material I'm using, so I need to be able to specify it precisely.
*   **Acrylic Width:** I need to specify how long the base should be for the acrylic sheet.
*   **Support Height:** How high the base needs to grip the acrylic for stability - I'd like to set this.
*   **Base Depth:** The depth of the base itself; how far back it should extend. A deeper base will probably be more stable, so it needs to be adjustable.
*   **Base Shape:** I need a choice between either a more angular "A" shape or a rounded "D" shape for the base's profile.
*   **Endcap Width and Overlap:** The endcaps for the base are important for finishing and cord routing, so the length they extend from the base and how much they overlap needs to be configurable.
*   **Connector Style:** The endcaps need to accommodate different power connection methods, so I need options for either a hole for a soldered wire, a clip-in strip connector, a larger hollow space to accommodate various wiring or a hole for a remote controller for an LED strip.
*   **Optional Features**:  I'd also like to optionally be able to add a small slot for a remote control for the LEDs and a small tray for business cards in front of the sign.

It would be ideal if the system could generate individual STLs for the base itself, the endcaps, and the endcap with the plug connection, and a full assembled option would also be helpful for testing fit. The base must incorporate a channel for a 10mm wide LED strip.

Could you generate OpenSCAD files for these components using those parameters? I'm not picky about libraries, but if any exist that would be helpful for this type of thing, feel free to use them.

[Assistant]
led-base-generator-v1.2.scad:
```
/*
 Generates LED backlighting bases for etched acrylic signs.
 v1.0 released in 2019 by Jeff Eaton (bonsai@angrylittletree.com)
 v1.1 released to fix Customizer bugs, add chamfering
 v1.2 Embarassing typo that broke Customizer again
*/

// Generate one part, multiple parts, or an assembled example
MODE = "set"; // ["base", "halfbase", "plugcap", "endcap", "set", "demo"]
// Rounded or angled base
BASE_SHAPE = "A"; // ["D", "A"]
// How are you supplying power to the LED strip?
CONNECTOR_STYLE = 1; //[1:"Soldered wire", 2:"Strip clip", 3:"Hollow with space for wiring", 4:"Micro-RF Remote"]

// Thickness of the acrylic sheet you're lighting
ACRYLIC_DEPTH = 3.2;
// Width of the acrylic sheet you're lighting
ACRYLIC_WIDTH = 200;
// How high the base should 'grip' the acrylic sheet for stability
SUPPORTED_HEIGHT = 25; // [10:5:50]
// How deep the base should be (deeper == more stable)
BASE_DEPTH = 60; // [20:5:100]
// Add a convenience slot in he base for a small remote control
BASE_REMOTE_HOLDER = false; // [true,false]
// Add a tray for business cards to the sign's base
BASE_CARD_TRAY = false; // [true,false]

// How far out from the sign should the base's endcaps protrude?
BASE_CAP_WIDTH = 20; // [10:5:60]
// How far should the sign's endcaps overlap the main base?
BASE_CAP_OVERLAP = 10; // [5:5:20]

/* [Hidden] */
LED_ELEVATION = 5;
LED_HEIGHT = 3;
LED_WIDTH = 11;
REMOTE_SIZE = [40,8,87];
CARD_TRAY_SIZE = [90,60];
CARD_TRAY_HEIGHT = 20;
BASE_HEIGHT = LED_ELEVATION + LED_HEIGHT + SUPPORTED_HEIGHT;

build(MODE);

module build(m=MODE) {
    if (m == "base") base();
    if (m == "halfbase") base(ACRYLIC_WIDTH/2);
    if (m == "endcap") endcap();
    if (m == "plugcap") plugcap();
    if (m == "set") {
        base();
        translate([BASE_DEPTH*2,BASE_DEPTH/2+5]) rotate([0,0,-90]) plugcap();
        translate([BASE_DEPTH/2+5,BASE_DEPTH/2+5]) rotate([0,0,-90]) endcap();
    }
    if (m == "demo") {
        base();
        translate([-BASE_CAP_OVERLAP*2,0,0])rotate([0,90,0]) endcap();
        translate([ACRYLIC_WIDTH + BASE_CAP_OVERLAP*2,0,0]) rotate([0,90,180]) plugcap();
        #cube([ACRYLIC_WIDTH, ACRYLIC_DEPTH, 200+SUPPORTED_HEIGHT]);
    }
}

module endcap() {
    difference() {
        cap_blank();
        translate([0,0,BASE_CAP_WIDTH-5]) linear_extrude(5.1) led_channel();
    }
}

module plugcap() {
    difference() {
        cap_blank();
        if (CONNECTOR_STYLE == 1) {
            // Hole for a soldered-on cord. Must be threaded through endcap before soldering.
            translate([-LED_ELEVATION,0,-.1]) linear_extrude(BASE_CAP_WIDTH+1) circle(r=2.5, $fn=12);
        }
        else if (CONNECTOR_STYLE == 2) {
            // Hole for a a 15x5mm solderless LED clip.
            translate([-LED_ELEVATION,0,-.1]) linear_extrude(BASE_CAP_WIDTH+1) square([5,15], center=true);
        }
        else if (CONNECTOR_STYLE == 3) {
            translate([0,0,2.4]) union() {
                linear_extrude(BASE_CAP_OVERLAP+BASE_CAP_WIDTH+1) offset(-2, $fn=12) base_profile();
                rotate([90,-90,0]) translate([15,4.5,15]) {
                    translate([0,-2.5,0]) cube([BASE_CAP_WIDTH+BASE_CAP_OVERLAP,5,20]);
                    cylinder(r=2.5, h=20, $fn=24);
                }
            }
        }
        else if (CONNECTOR_STYLE == 4) {
            // Hole for a a 15x5mm solderless LED clip.
            translate([-18,0,-.1]) linear_extrude(BASE_CAP_WIDTH+1) rotate([0,0,180]) scale([1.5,1.15]) led_channel();
        }

    }
}

module cap_blank() {
    difference() {
        linear_extrude(BASE_CAP_WIDTH+BASE_CAP_OVERLAP) offset(1.8, $fn=12) base_profile();
        translate([0,0,BASE_CAP_WIDTH]) linear_extrude(BASE_CAP_OVERLAP+1) union() {
            offset(.2, $fn=12) base_profile();
            acrylic_channel();
        }
    }
}

module base(length=ACRYLIC_WIDTH) {
    ROUNDING = (BASE_SHAPE == "A" ? 4 : 24);

    difference() {
        union() {
            rotate([0,90,0])linear_extrude(length) base_profile();
                if (BASE_CARD_TRAY) {
                    translate([ACRYLIC_WIDTH/2,-CARD_TRAY_SIZE[1]+BASE_DEPTH/3,0]) linear_extrude(LED_ELEVATION + CARD_TRAY_HEIGHT) offset(3.2, $fn=ROUNDING) square(CARD_TRAY_SIZE, center=true);
                }
        }

        union() {
            rotate([0,90,0]) {
                translate([0,0,-.5]) union() {
                    linear_extrude(length+1) union() {
                        led_channel();
                        acrylic_channel();
                    }
                }
                if (BASE_REMOTE_HOLDER) {
                    translate([-REMOTE_SIZE[0]/2 - LED_ELEVATION, 15, ACRYLIC_WIDTH/2]) cube(REMOTE_SIZE, center=true);
                }
            }
            if (BASE_CARD_TRAY) {
                translate([ACRYLIC_WIDTH/2,-CARD_TRAY_SIZE[1]+BASE_DEPTH/3,LED_ELEVATION]) linear_extrude(LED_ELEVATION + CARD_TRAY_HEIGHT*2) square(CARD_TRAY_SIZE, center=true);
            }
       }
    }

}

module base_profile() {
    if (BASE_SHAPE == "A") {
        offset(.5, $fn=6) offset(-.5)
        polygon(
            [[0,BASE_DEPTH/2],
            [-BASE_HEIGHT,ACRYLIC_DEPTH/2 + 2],
            [-BASE_HEIGHT,-ACRYLIC_DEPTH/2 - 2],
            [0,-BASE_DEPTH/2]]
        );
    }
    else if (BASE_SHAPE == "D") {
        intersection() {
            scale([BASE_HEIGHT*2, BASE_DEPTH]) circle(r=.5, center=true, $fn=72);
            translate([-BASE_HEIGHT/2,0]) square([BASE_HEIGHT,BASE_DEPTH], center=true);
        }
    }
}

module led_channel() {
    // Channel for the LED strip
    polygon(
        [[-LED_ELEVATION,-LED_WIDTH/2],
        [-LED_ELEVATION-LED_HEIGHT,-LED_WIDTH/2],
        [-LED_ELEVATION-LED_HEIGHT-3,0],
        [-LED_ELEVATION-LED_HEIGHT,LED_WIDTH/2],
        [-LED_ELEVATION,LED_WIDTH/2]]
    );
}

module acrylic_channel() {
    // Channel for theacrylic plate
    translate([-BASE_HEIGHT/2-LED_ELEVATION-LED_HEIGHT,0]) square([BASE_HEIGHT, ACRYLIC_DEPTH], center=true);
}
```


[User]
I'm looking to design a parametric toothbrush head stand for Oral-B style brush heads, and I'd like to be able to customize a few aspects of it. It should have a base with multiple slots to hold the brush head stands, and I want to choose how many stands it has, whether it's one solid piece or modular, the basic shape of the base (either square or round), and have a tolerance parameter for the stands.

Specifically, the design should have:

*   A customizable number of brush head stands (let's say between 1 and 10).
*   The option to print the stands separately ("Modular") or as part of the base ("Solid").
*   The ability to select a "Square" or "Round" base shape.
*   A tolerance parameter that adjusts how tightly the stand fits into the base when using the "Modular" setting.
*   The base should have a plinth section between the base and the stand mount itself.
*  The shape of the stands should be a cylinder with a rounded top and a section cut out of the side, as described in the original scad file (I can provide this if necessary, but I'm hoping you'll be able to figure out the shape from the description)
* The stands should have a stub underneath that mounts into the base. This should be a square with a semi-circle on each side.
*   I'm happy with you making some reasonable decisions about the various dimensions like base height, plinth height and width, etc.

I think that covers it. Can you generate the OpenSCAD file(s) for me? I'm not really fussed about whether it's one file or a few, whatever makes it easier for you. I'm not using any particular OpenSCAD libraries at the moment, so feel free to use whatever libraries you think makes the most sense.

[Assistant]
OralBModularBrushHeadStand.scad:
```
// Customiser options

// Adjust number of heads
numHeads = 3; // [1:10]
// Print stands separately "Modular" or integrated "Solid"
standsSeparate = "Solid"; // [Solid,Modular]
// What to print, "Stand" or "Base"
print = "Base"; //[Base,Stand]
// Basic shape, "Square" or "Round"
shape = "Round"; // [Square,Round]
// Adjust for tightness when printing stands separate
tolerance = 0.3; // [0:0.1:1]

// Other parameter (hidden form customiser)

/* [Hidden] */
plinthH = 4;
plinthW=11.7;
baseH = 5;
baseW = 35;
separation = 21.5;
stubW = 4;
stubD = 6;
stubH = 5;
depth = 2;
inset = 2;

if (stubH <= baseH - depth + plinthH - 1) {
    if (print=="Stand") stand(); else base();
    }
else
    echo("************* WARNING! Stub height to deep for base plus plinth heights! **************");

module standShape() {
// created this by emulating the stand shape from the referenced remix STL file. Hence all the weird values & no point in parameterising.
    difference() {
        union() {
            // create the lower cone
            cylinder (7.8,4.5,0,$fn=40);
            difference() {
                // create the upright rounded on two sides
                intersection() {
                    translate([0,0,7]) cube ([4.4,7.2,14],true);
                    linear_extrude(14) circle(3.595,$fn=40);
                    }
                    // subtract the divot in the side
                    t=0.006;
                    translate([1.47,0.25,0])
                    linear_extrude(15)
                        difference() {
                            translate([.005,0,0]) square(360*t);
                            union() {
                            for(i=[0:1:360]) {
                                translate([0,t*i,0]) square([(1+cos(i))/2.74,t]);
                            }
                        }
                    }
                }
        }
        // round off the top
        difference() {
            translate([0,0,13.5]) rotate_extrude($fn=40) translate([3.1,0,0]) square(.5);
            translate([0,0,13.5]) rotate_extrude($fn=40) translate([3.1,0,0]) circle(.5,$fn=40);
        }
    }
}

module plinth() {
    difference() {
        cylinder(h=plinthH,r=plinthW/2+plinthH,$fn=80);
        translate([0,0,plinthH]) rotate_extrude($fn=80) translate([plinthW/2+plinthH, 0, 0]) circle(plinthH,$fn=80);
    }
}

module base1() {
    if (shape=="Round") {
        difference() {
            cylinder(h=baseH,r=baseW/2,$fn=80);
            translate([0,0,baseH]) rotate_extrude($fn=80) translate([baseW/2-inset-depth, 0, 0]) circle(depth,$fn=80);
            translate([0,0,baseH-depth]) cylinder(h=depth,r=baseW/2-inset-depth,$fn=80);
        }
    }
    else {
        difference() {
            translate([-baseW/2,-baseW/2,0]) cube([baseW,baseW,baseH]);
            translate([-baseW/2+inset+depth,-baseW/2+inset+depth,baseH-depth])
                cube([baseW-2*(inset+depth),baseW-2*(inset+depth),depth+1]);
            translate([-baseW/2+inset,baseW/2-inset-depth,baseH]) rotate([0,90,0]) chamfer();
            translate([-baseW/2+inset,-(baseW/2-inset-depth),baseH]) rotate([90,270,90]) chamfer();
            translate([-baseW/2+depth+inset,-baseW/2+inset,baseH]) rotate([0,90,90]) chamfer();
            translate([baseW/2-(inset+depth),-baseW/2+inset,baseH])
            rotate([90,270,180])
            chamfer();
        }
    }
}

module chamfer() {
    difference() {
        cylinder(h=baseW-2*inset,r=depth,$fn=80);
        translate([0,-depth,0]) rotate([45,0,0]) cube(2*depth/sin(45),true);
        translate([0,-depth,baseW-depth/sin(45)/sin(45)]) rotate([-45,0,0]) cube(2*depth/sin(45),true);
    }
}

module base() {
    if (standsSeparate=="Modular")
        difference() {
            basePrep();
            for(i=[1:1:numHeads]) {
                translate([(i-1)*separation,0,baseH-depth+plinthH-stubH]) stub(tolerance);
            }
        }
    else
        basePrep();
}

module basePrep() {
    baseLHS();
    for(i=[1:1:numHeads]) {
        if (i<numHeads) translate([(i-1)*separation,0,0]) baseMid();
            translate([(i-1)*separation,0,baseH-depth]) plinth();
        if (standsSeparate=="Solid")
            translate([(i-1)*separation,0,baseH+plinthH-depth]) stand();
    }
    translate([(numHeads-1)*separation,0,0]) baseRHS();
}
module baseLHS() {
    intersection() {
        base1();
        translate([-(baseW+1)/2,-(baseW+1)/2,0]) cube([baseW/2+1,baseW+1,baseH+1]);
    }
}

module baseRHS() {
    intersection() {
        base1();
        translate([0,-(baseW+1)/2]) cube([baseW/2+1,baseW+1,baseH+1]);
    }
}

module baseMid() {
    difference() {
        translate([0,-baseW/2,0]) cube([separation,baseW,baseH]);
        translate([0,-baseW/2+inset+depth,baseH-depth]) cube([separation,baseW-2*(inset+depth),depth+1]);
        translate([0,baseW/2-inset-depth,baseH]) rotate([0,90,0]) cylinder(h=separation,r=depth,$fn=80);
        translate([0,-(baseW/2-inset-depth),baseH]) rotate([0,90,0]) cylinder(h=separation,r=depth,$fn=80);
    }
}

module stand() {
    if (standsSeparate=="Modular") {
        translate([0,0,stubH-tolerance])
        standShape();
        stub(0);
    }
    else
        standShape();
}

module stub(gap) {
    linear_extrude(stubH-tolerance+gap)
    union() {
        intersection() {
            square([stubW+gap,stubD+gap],true);
            circle((stubD+gap)/2,true, $fn=80);
        }
        translate ([0,(stubD+gap)/4,0])
        square([stubW+gap,(stubD+gap)/2],true);
    }
}

```


[User]
I'd like to design a customizable whiteboard eraser with a few key features. It should be a simple, rectangular prism shape, and I'd like to be able to optionally add a text label to it. Also, I want to incorporate a "belt" feature - essentially a recessed channel around the middle of the eraser, which I'm envisioning as a place where a felt material could be attached.

Here are the specific parameters I'm thinking of:

*   **Overall Dimensions:** I need to be able to set the width, length, and height of the eraser.
*   **Text Label:**
    *   I want to be able to specify the text string.
    *   I need control over the text's horizontal position using an offset.
    *   I need to select the font to use.
    *   I want to control the text size in mm.
    *   I should be able to set the text's height, with the ability to create either raised or engraved text by using a positive or negative value, respectively.
*   **Belt Feature:**
    *   The belt should be a recessed channel around the mid-height of the eraser.
    *   I'd like to control the belt's diameter.
    *   I'd like a small offset value to control how far the belt recesses into the main eraser body.

I'd like this designed as a parametric OpenSCAD file. No libraries are necessary; everything can be done with standard OpenSCAD. I'd like the main eraser object to be generated by a module called `eraser()` and the belt to be generated by a module called `belt()`, and the label by `label()`. I would like a function to use either positive or negative to have the text on the surface or cut into the material.

Could you generate the OpenSCAD code for this?

[Assistant]
Eraser.scad:
```

Width  = 40;
Length = 100;
Height = 30;

// Use spaces to center the text
label_text   = " RafaelEstevam";
// Controls the offset to center
label_ffsetX = 15;
// Font name
label_font   = "Liberation Sans";
// Font size in mm
label_size   = 10;
// Font heigh, use negative value to low relief text
label_heigh   = 1.5;

eraser();
//belt();

module eraser(){
  if (label_heigh > 0 && len(label_text) > 0) label();
  difference(){
    cube([Width, Length, Height]);
    belt();
    if (label_heigh < 0 && len(label_text) > 0) label();
  }
}
module label(){
  h = Height + (label_heigh < 0 ? label_heigh : -0.01);

  translate([label_size+label_ffsetX,0,h]) rotate(a=[0,0,90])
  linear_extrude(height = abs(label_heigh)) {
     text(label_text, font = label_font, size = label_size);
   }
}
module belt(){
  cd = Height/3;
  offset = 1;

  translate([0,0,cd*1.5]){
    rotate(a=[0,90]){
      translate([0,-offset])
        cylinder(d=cd,Width);
      translate([0,Length+offset])
        cylinder(d=cd,Width);
    }
    rotate(a=[-90,0]){
      translate([-offset,0])
        cylinder(d=cd,Length);
      translate([Width+offset,0])
        cylinder(d=cd,Length);
    }
  }
}
```


[User]
Hi there, I'd like to design a bird bath using OpenSCAD, and I'm looking for some help creating the necessary code. I've seen a design that I like which uses a few different levels, and it also puts some text on the side.

Essentially, the bird bath will consist of a main, cylindrical body with a mitered edge on both the top and bottom. Inside of this, there will be a series of smaller, nested cylinders offset from the center both horizontally and vertically, also with mitered edges. I need to be able to control these parameters.

More specifically, I need:
*   The overall radius of the bird bath.
*   The total height of the bird bath.
*   The radius of each of the inner cylinders.
*   The vertical distance of each inner cylinder from the bottom of the bird bath.
*   The horizontal offset of each inner cylinder from the center of the bird bath.
*   The rotation angle of each inner cylinder around the center of the bird bath.
*   The mitered edge width/height, both top and bottom, which should be the same for all cylinders.
*   The text to be placed on the side of the birdbath, as well as the font, font size, extrusion height, and text direction.

Additionally, I’d like to have three grooves cut into the bottom of the bird bath, similar to radial slices removed from the base. These grooves should be equally spaced and sized.

The design I'm imagining uses the `text_on` library, so I'll need that as well. It can be found here: [https://github.com/brodykenrick/text_on_OpenSCAD](https://github.com/brodykenrick/text_on_OpenSCAD).

It would be ideal if the code was parameterized, so that I can easily adjust these parameters to create different variations of the design without having to manually change hardcoded values. Could you help me with this?

[Assistant]
Birthbath1.scad:
```
//BIRD BATH WITH DIFFERENT LEVELS
//By Coat 2019

use <text_on/text_on.scad>  //used library

//---------
//parameters
//smoothness
  $fn=100;
//radius outside
  rad0=100;
//total height
  h0 = 50;
//radius innercircles
  rad1=60;
  rad2=60;
  rad3=60;

//distance innercylinders from bottom
  tz1=5;
  tz2=20;
  tz3=35;
//offset innercircle from middle
  ty1=25;
  ty2=25;
  ty3=25;
//rotation innercircle around middle
  rot1=0;
  rot2=120;
  rot3=240;
//width/height mitered edge
  mit=4;
//text on side
  text="I tawt I taw a puddy tat!****";
  //text="Customizable text!****";
  //text="*****************************";
  //text=":::::::::::::::::::::::::::::";

//The bath
difference()
{
  //body with text
  mitercyl(rad0,h0,mit,mit);
  text_on_cylinder(t=text,r1=rad0, r2=rad0, h=25, font="impact", direction="ttb", size=27, extrusion_height = 2);

  //grooves in bottom
  rotate([0,0,0])
    cube([3,3*rad0,mit], center = true);
  rotate([0,0,120])
    cube([3,3*rad0,mit], center = true);
  rotate([0,0,240])
    cube([3,3*rad0,mit], center = true);

  //innercircles
  rotate([0,0,rot1])
    translate([0,ty1,tz1])
      mitercyl(rad1,h0,0,mit);
  rotate([0,0,rot2])
    translate([0,ty2,tz2])
      mitercyl(rad2,h0,0,mit);
  rotate([0,0,rot3])
    translate([0,ty3,tz3])
      mitercyl(rad3,h0,0,mit);
}

//used modules
module mitercyl(rad,hei,mtop, mbot)
{
  cylinder(r1=rad-mbot, r2 = rad, h=abs(mbot));
  translate([0,0,abs(mbot)])
    cylinder(r=rad, h=hei-abs(mtop)-abs(mbot));
  translate([0,0,hei-abs(mtop)])
    cylinder(r1=rad, r2=rad-mtop, h=abs(mtop));
}

```


[User]
Hey, I'm trying to design a modular system of blocks that I can connect together to make different shapes. I've got a good start on what I want in OpenSCAD, but I need some help fleshing it out, especially with making it more parametric.

The basic idea is a square mesh with connectors on all four sides. Each side should have both a male pin and a female clasp connector, so they can all fit together. The connectors need to be designed so that when two blocks are placed next to each other, a pin will naturally fit into a clasp. I'd like this to work in 3D, so I can stack blocks on top of each other.

Here are the parameters I'm thinking of:

**Core Parameters:**

*   `$fn`: Number of segments for circles (this affects all circular features)
*   `mesh_size`: The length and width of the square mesh itself (excluding connectors)
*   `mesh_height`: The thickness of the mesh
*   `mesh_hole_diameter`: The diameter of each hole in the mesh
*   `mesh_border`: The width of the solid border around the mesh
*   `mesh_border_height`: The height/thickness of the mesh border
*   `mesh_grid_spacing`: The spacing between the mesh holes, as a fraction.
*   `con_depth`: The depth of the connector, which is also equal to the connector height
*   `con_height`: The height of the connector, which is also equal to the connector depth
*   `con_width`: The width of the connector, which is equal to the width of the mesh
*   `cp_length`: The length of the clasp pin
*   `cp_rad`: The radius of the clasp pin
*   `clasp_len`: The length of the clasp (the female connector), it should be a little shorter than `con_width`
*   `clasp_mouth`: The size of the gap in the clasp, should be related to the pin radius, so the pin can enter
*   `clasp_inner_rad`: The inner radius of the clasp, should be slightly bigger than the pin radius
*    `clasp_outer_rad`: The outer radius of the clasp, which determines how thick the clasp is.

I'd like the design to be modular, split into these parts:

*   **Mesh:** The square grid with holes and a surrounding border.
*   **Pin:** The male connector, a cylinder projecting from a mount.
*   **Clasp:** The female connector, a c-shaped clasp with a cut-out to allow the pin to enter.
*   **Assembly:** The main module that puts the Mesh with Pin and Clasp connectors all in one piece.

I'm expecting the output to be in OpenSCAD. I'm familiar with the basic `cube`, `cylinder`, `translate`, `rotate` and `difference` functions. I'm also comfortable with using modules and `for` loops. Let's not include any libraries for now, I want to keep this as vanilla OpenSCAD as possible!

Can you help me generate this design? I'm looking for code that I can copy and paste into OpenSCAD. I'd like to be able to adjust any of these parameters to change the size and shape of the blocks.

[Assistant]
combined.scad:
```
// ------------ START: assembly.scad -----------------

/* [Core] */
// Number of segments in a circle. Affects all circles - mesh, pins, clasps, etc
$fn=10;

// === Mesh Variables ============
/* [Mesh] */
// XY for the mesh only. Pins and clasp will be placed outside this size
// so ensure your printer bed can handle "mesh_size + con_depth"
mesh_size = 180;
// Z height of the mesh part where the holes go
mesh_height = 1;
// Size of each hole in the mesh
mesh_hole_diameter = 15;
// Depth (in XY) of the border around the mesh itself. Needed to support the mesh
mesh_border = 2.5;
// Z height of the border. Can be equal to mesh height or the connector height
mesh_border_height = 10;
// How close the mesh circles are to each other
mesh_grid_spacing = 3; // [1:10]
// === End =======================

// === Connector Variables ============
// These define the bounding box used by both
// the clasp pin and the clasp
/* [Connector Shared Variables For Clasp And Pin] */
// Width each connector gets. We currently have one connector per side so
// we use the full width of the mesh
con_width = mesh_size;
// Height each connector gets. Printing connectors seems to be easier if they are
// bigger, so we set them to be as tall as the mesh border to get maximum height
con_height = mesh_border_height;
// Depth each connector gets. Keeping the connectors in a square bounding box
// ensures 3D assemblies work OK. If you make it non-square then one of your
// resulting axis will end up longer when assembling multiple sides together
con_depth = con_height;
// === End =======================

// === Clasp Pin Variables ============
/* [Pin] */
// Length of the clasp pin
cp_length = con_width;
// Radius of the pin. Larger values print smoother but require larger mesh border
// height. Also, the clasp (the female half) will grow larger and may be taller
// than the mesh border height. If this happens, it is probably time to stop using
// Customizer and use OpenSCAD directly where you can see/edit many more variables
cp_rad = 2.5;
// TODO define cp_mount_width = 1;
// === End =======================

// === Clasp Variables ============
/* [Clasp] */
// Lenght of the clasp. We remove a bit so there is an empty space matching up to
// the pin mounts
clasp_len = con_width - 3;
// Amount of the gap we will cut out of the clasp circumference. 2 * the radius would
// allow the pin to fall out without obstruction, so we go a bit lower than taht
clasp_mouth = cp_rad * 1.65;
// Inner radius of the clasp. We add a small buffer due to printing defects. Remember
// the pin should rotate freely in the clasp
clasp_inner_rad = cp_rad + 0.65;
// The outer radius. This effectively describes the 'thickness' of the clasp. Thicker
// values are much harder to bend, while values too small make a weak clasp that cracks.
// Note that there is no safety check that the clasp_outer_rad will fit within the
// connector's bounding box, so you need to manually look at the Z-axis when making a
// thick clasp and ensure you're not making it so large it will not print properly
clasp_outer_rad = clasp_inner_rad * 1.25;
// === End =======================

/* [Hidden] */
// Overall mode
// 1 - Generate one side (mesh with clasps & pins)
// 2 - Testing code
mode = 1;

if (mode == 1) {
mesh_with_clasps_and_pins();
} else if (mode == 2) {
test();
}

module mesh_with_clasps_and_pins() {

// Make mesh & slide to have room for connectors
translate([con_depth, con_depth, 0])
mesh(side_length = mesh_size,
hole_diameter = mesh_hole_diameter,
height = mesh_height,
border = mesh_border,
border_height = mesh_border_height,
grid_spacing = mesh_grid_spacing / 10);

// Create male sides
color("red") translate([con_depth, 0 , 0])
male_pin_and_mount();
color("red") translate([0, mesh_size + con_depth,0])
rotate([0, 0, 270])
male_pin_and_mount();

// Create female sides
color("green") translate([con_depth, mesh_size + con_depth, 0])
female_clasp_and_mount();
color("green") translate([mesh_size + con_depth, mesh_size + con_depth,0])
rotate([0, 0, -90])
female_clasp_and_mount();

module female_clasp_and_mount() {
// Helper variables
clasp_thickness = clasp_outer_rad - clasp_inner_rad;
clasp_mount_depth = con_depth - clasp_outer_rad*2; // Does not incl. thickness
// Fudge factor, we need to keep the clasp within the
// bounding box or our 3D arrangement won't work right. However, we also
// need it to be roughly aligned with the pin or the 3D arrangement will
// be hard to assemble. Calculating directly is tough, as the bigger the
// mouth cut is, the more of a fudge factor we need. So we approx an OK val
clasp_extra_mount_depth = clasp_mouth / 3.6;

// Assume we need to reserve 3mm (total) in X-axis the clasp mounts
// Realign Y-axix to zero
translate([1.5, clasp_outer_rad + clasp_mount_depth,0])
union() {

// Shift clasp down to ease alignment
translate([0,
clasp_extra_mount_depth,
(mesh_border_height / 2) - clasp_outer_rad])
clasp(length = clasp_len,
pin_radius = cp_rad,
mouth = clasp_mouth,
inner_radius = clasp_inner_rad,
outer_radius=clasp_outer_rad);
// Build + align clasp mount
translate([0, -clasp_outer_rad-clasp_mount_depth, 0])
cube([con_width - 3,
clasp_mount_depth + clasp_thickness + clasp_extra_mount_depth,
con_height]);

// Debug (for ensuring the bounding box is right)
// translate([0, -clasp_outer_rad-clasp_mount_depth, 0])
// cube([1, con_depth, con_height]);
}
}

// Helper function
module male_pin_and_mount() {
// color("green") cube([con_width, con_depth, con_height]);
// Assume mounts are each 1mm wide
// Assume we want the CP 2.5mm deep
pin_mount_height = (mesh_border_height / 2) - cp_rad;
union() {
cube([1, con_depth, con_height]);
translate([0, 2.5, pin_mount_height])
clasp_pin(radius=cp_rad, length=cp_length);
translate([con_width-1, 0, 0])
cube([1, con_depth, con_height]);
}
}
}

// ------------ END: assembly.scad -----------------
// ------------ START: clasp.scad -----------------
// clasp(length = 10);
// Need a sample pin?
//color("blue") clasp_pin(radius = 5, height = 12);

module clasp(length=20,
pin_radius=5,
// All of these are defined below due to
// SCAD language limits (no derived params)
mouth = undef,
inner_radius = undef,
outer_radius = undef
) {
mouth = is_undef(mouth) ? pin_radius * 1.75 : mouth;
inner_radius = is_undef(inner_radius) ? pin_radius + 0.25 : inner_radius;
outer_radius = is_undef(outer_radius) ? inner_radius * 1.4 : outer_radius;

echo(str("Building clasp with: "));
echo(str(" Length: ", length));
echo(str(" In Radius: ", inner_radius));
echo(str(" Out Radius: ", outer_radius));
echo(str(" Mouth : ", mouth));
echo(str(" PinRad: ", pin_radius));

// Build clasp, lay horizontally, and reorient z-axis to zero
translate([0, 0, outer_radius])
rotate([0, 90, 0])
difference() {
cylinder(r=outer_radius,h=length);

translate([0,0,-1])
cylinder(r=inner_radius,h=length+2);

cutout_mouth(mouth, inner_radius);
}

// Helper module
module cutout_mouth(mouth, radius) {
echo(str("Cutting mouth with: "));
echo(str(" Mouth: ", mouth));
echo(str(" InnerRad: ", radius));
angle_rad = mouth / radius; // circle central angle (rad)
angle_deg = angle_rad * 57.2958; // (degrees)
echo(str(" Angle: ", angle_deg));

size = length + 2;
if (angle_deg <= 90) {
// Rotate so our cut always faces +Y
rotate([0, 0, 90 - angle_deg/2])
translate([0,0,-1])
intersection() {
cube(size);
rotate(angle_deg-90) cube(size);
}
} else if (angle_deg <= 180) {
// Rotate so our cut always faces +Y
rotate([0, 0, 90 - angle_deg/2])
translate([0,0,-1])
union() {
cube(size);
rotate(angle_deg-90) cube(size);
}
} else {
echo(str("FAILURE - Angle cannot exceed 180"));
}
}

}

module clasp_pin(radius, length) {
// You can rotate it to get a better print angle, but you
// will need 8xSupports while printing
// which is tedious to clean
// rotate(a=45, v=[1,0,0])

// Lay pins horizontally & reorient z-axis to zero
translate([0,0,radius])
rotate([0, 90, 0])
cylinder(r=radius, h=length);
}

/*
THIS is not working right now. It's a good idea to combine these, but
the sad truth is a large amount of the correct clasp pin design has to do
with how you combine it with the mesh border. So it's a bit hard to embed
with the clasp.scad file after the fact
module clasp_pin(length=cp_len,
radius=cp_rad) {

difference() {
// We oversize the cube (in Y and Z) to prevent edge artifacts
translate([0, -1, -1])
cube([length, 2+cp_box_depth, mesh_height+2]);

// You can rotate it to get a better print angle, but you
// will need 8xSupports while printing
// which is tedious to clean
// rotate(a=45, v=[1,0,0])
translate([-1, cp_box_depth/2, mesh_height/2])
rotate([0, 90, 0])
cylinder(r=radius, h=length+2);
}
}
*/

// ------------ END: clasp.scad -----------------
// ------------ START: mesh.scad -----------------
// mesh(side_length=50);
/*mesh(side_length,
hole_diameter,
height,
border,
grid_spacing / 10);
*/

module mesh(side_length,
hole_diameter = undef,
height=3,
border=undef,
border_height=undef,
grid_spacing=0.2) {

hole_diameter = is_undef(hole_diameter) ? side_length / 8 : hole_diameter;
border = is_undef(border) ? side_length *.1 : border;
border_height = is_undef(border_height) ? height : border_height;

echo(str("Building mesh with: "));
echo(str(" Side: ", side_length));
echo(str(" Hole Diameter: ", hole_diameter));
echo(str(" Height: ", height));
echo(str(" Border : ", border));
echo(str(" Border Height : ", border_height));
echo(str(" Grid Spacing: ", grid_spacing));

// Ensure the border is sane
// border = min(border, side_length / 2.5);
size = side_length;

// We can only place holes in the non-border, and
// each hole actually takes a bit of addl. spacing
hole_footprint = hole_diameter * (1 + grid_spacing);
s_avail = size - border*2;
hole_count = ceil(s_avail / hole_footprint);
hole_r = hole_diameter / 2;

// Diagnostic data
/*echo(str("We have ", s_avail, "mm of space for holes"));
echo(str("We will place ", hole_count, " holes"));
echo(str("Each hole has a footprint of ", hole_footprint, "mm-squared"));
*/

union(){
// Build the four border walls
color("gray") {
cube([size,border,border_height]);
cube([border,size,border_height]);

translate([size-border,0,0])
cube([border,size,border_height]);

translate([0,size-border,0])
cube([size,border,border_height]);
}

// Lay out the mesh and cut the circles
// TODO Do we want mesh to be in middle of border_height? Makes printing harder
difference() {
translate([border, border, 0])
cube(size=[size - 2*border, size - 2*border, height]);

translate([border + hole_r, border+hole_r, -1])
for (x = [0:hole_count - 1]) {
translate([x * hole_footprint, 0, 0])
for (y = [0:hole_count - 1]) {
translate([0, y * hole_footprint, 0])
cylinder(r=hole_diameter / 2, h=height*4, $fn=20);
}
}
}
}
}

// ------------ END: mesh.scad -----------------

```


[User]
I'm looking to create a parametric pen holder in OpenSCAD, and I want it to hold 25 pens. The basic idea is that it's a circular holder with angled tubes around the perimeter, each tube holding one pen.

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

*   **`holder_radius`**: The radius of the main circular base of the holder.
*   **`holder_thickness`**: The thickness of the material for the main base and the tube walls.
*  **`holder_height`**: The height of the main base.
*   **`tube_bottom_thickness`**: The thickness of the material at the bottom of the pen tubes.
*  **`pen_count`**: The number of pens the holder should accommodate, which will be 25 in this case.
*   **`pen_radius`**: The radius of the pens themselves.
*   **`pen_length`**: The length of the pens, which determines how long the tubes should be.
*   **`rotx`**: The angle of the pen tubes in the X direction, controlling how much the pens tilt upwards from the base.
*   **`rotz`**: The rotation of the pen tubes around the Z axis, controlling the slant angle of the pen tubes.

I need the code to create a solid base with the pen tubes angled up and slightly slanted outwards, positioned evenly around the circumference of the base. The tubes should start with the opening flush with the top surface of the base, and continue downwards to form a tube-like structure. It should not be possible for the pen to be pushed all the way through to the base. The bottom of the tube should be capped with a small thickness.

I'd also like to have a preview of the pens themselves, just as a visual aid. It can be commented out so it doesn't interfere with the actual generation of the holder. So the preview would show the pen cylinders extending out from the holder.

Could you generate the OpenSCAD file based on these parameters?

[Assistant]
penhold4_2017update_25pcs.scad:
```
holder_radius = 65;
holder_thickness = 3;
holder_height = 30;
tube_bottom_thickness = 1;
pen_count = 25;
pen_radius = 4.5;
pen_length = 150;
rotx = 35;
rotz = -40;

{ // pen model for editor preview
    for (a=[1:360/pen_count:360]) {
        rotate([0,0,a])
        translate([holder_radius,0,0])
        rotate([rotx,0,rotz])
        %cylinder(h=pen_length, r = pen_radius);
    }
}

//intermediate variables
r = pen_radius+holder_thickness;
bot_shift = tan(rotx)*r;
cutoff_h = 2*sin(rotx)*r;
cylinder_length = cutoff_h*2 + holder_height;
cylinder_length = 2*tan(rotx)*r + 1/cos(rotx)*holder_height;
cutoff_r = cylinder_length + holder_radius + r; //upper bound of each var

difference() {
  { //material part of the tubes
    for (a=[1:360/pen_count:360]) {
      rotate([0,0,a])
      translate([holder_radius,0,0])
      rotate([rotx,0,rotz])
      translate([0,0,-bot_shift])
      cylinder(h=cylinder_length, r = pen_radius + holder_thickness);
    }
  }
  difference() {
    {//hole part of the tubes
      for (a=[1:360/pen_count:360]) {
        rotate([0,0,a])
        translate([holder_radius,0,0])
        rotate([rotx, 0, rotz])
        translate([0,0,-bot_shift])
        cylinder(h=cylinder_length, r = pen_radius);
      }
    }
    //stop drilling that hole before hitting the bottom
    cylinder(h=tube_bottom_thickness, r=cutoff_r);
  }
  //cut out the bottom
  translate([0,0,-cutoff_h])
  cylinder(h=cutoff_h, r = cutoff_r);
  //cut out the top
  translate([0,0,holder_height])
  cylinder(h=cutoff_h, r = cutoff_r);
}

```


[User]
I'm looking to create a simple hollow box that will act as a cap for the cut-off legs of an IKEA Lack table. I need it to be parametric so I can adjust the size.

The basic idea is a rectangular box with an open top. I'll need to specify the inner dimensions (width and length), the overall height of the box, and the thickness of the walls. There should also be a floor, so I'll also need to specify its thickness.

So, in terms of parameters, I'd like:

*   `inner_width`: The internal width of the box (mm).
*   `inner_length`: The internal length of the box (mm).
*   `height`: The overall height of the box (mm).
*   `floor_thickness`: The thickness of the bottom of the box (mm).
*   `wall_thickness`: The thickness of the walls of the box (mm).

I need a single OpenSCAD file to create this. I don't require any libraries.

[Assistant]
lack_foot.scad:
```
// (mm)
inner_width = 50.8;
// (mm)
inner_length = 50.8;
// (mm)
height = 10;
// (mm)
floor_thickness = 0.4;
// (mm)
wall_thickness = 1;

difference(){
    cube([inner_length+(2*wall_thickness),inner_width+(2*wall_thickness),height]);
    translate([wall_thickness,wall_thickness,floor_thickness]) cube([inner_length,inner_width,height]);
}
```


[User]
Hey, I'm looking to design a self-watering insert for a flower pot, and I've got a pretty specific set of requirements. I've seen some designs out there but I want something more customizable. I'm hoping you can help me generate some OpenSCAD files for this.

Here's what I'm envisioning:

**Core Structure:**

*   A circular top plate that sits on the rim of the pot. I'd need to specify its diameter and thickness.
*   It needs a central, larger support pole with a series of drainage holes/perforations along its length. I want to be able to control its size relative to the side poles.
*   Four smaller, tapering side poles evenly spaced around the center. I need to control the top and bottom diameter of the poles, as well as the pole's height, and the height of a stilt at the bottom of each. The placement of the side poles relative to the center can also be adjusted.
*   All poles should have drainage holes near the top of each to allow water to flow back into the bottom of the pot.
*   Four drain panels, each with configurable numbers of rows and columns of small drainage holes, and spacing between the holes. I want to place these between each side pole, near the outer edge of the top plate.

**Watering Feature:**

*   An optional attachment for a watering tube/indicator. It'll need a configurable top and bottom diameter, height, and a position relative to the center. I'd like to enable/disable this feature with a variable.

**Customization:**

*   All dimensions should be controlled via variables, so I can easily adjust the design for different pot sizes.
*   I'd need to set overall quality for the design using `$fn`.

**Details:**

*   I need to specify the top plate diameter and thickness.
*   I need to specify the top and bottom diameter, height, stilt height, relative position, and drainage hole diameter for the side poles.
*   The center pole should have a scale factor relative to the side poles.
*   I need to control the diameter and the arrangement (rows, columns, and spacing) of the drainage holes in the panels.
*   For the watering tube/indicator attachment, I need to specify if it is enabled, plus the top and bottom diameters, height, and relative position.
*   I'll need a variable for a pole drainage hole adjustment.

Essentially, I want a parametric design that lets me adjust all these parameters to fit various pot sizes and preferences. If you could generate a set of SCAD files that achieves this, I'd really appreciate it. I think it should be doable with OpenSCAD's standard libraries.

[Assistant]
kvetinace_v2.scad:
```
/* [Top Plate] */

// Diameter of the top plate, in mm.
diam = 116;

// Thickness of the top plate, in mm.
thickness = 3;

/* [Tertiary Poles] */

// Diameter of the hole leading to one of the four side poles, in mm.
pole_diam_top = 20;

// Diameter of the bottom of the four side poles, in mm. Typically smaller than the top diameter for tapering. For minimal support structures, make the poles cone-shaped by keeping this number small so your printer can bridge the center pole gap.
pole_diam_bottom = 6;

// Height of the hollowed pole section (not counting stilt), in mm.
pole_height = 40;

// Height of the stilt (raised area at the bottom of the pole), in mm.
pole_stilt_height = 3;

// Relative position of pole away from center, between 0 and 1.
poles_center = 2/3;

// Diameter of the drainage hole at the bottom of the pole, in mm.
pole_hole = 3;

/* [Center Pole] */

// Size of the center pole relative to the tertiary ones, as a multiplier.
center_pole_scale = 2.5;

/* [Drainage Panels] */

// Diameter of a drainage hole in the panel, in mm.
hole = 2;

// Number of hole rows in one panel.
hole_rows = 4;

// Number of hole columns in one panel.
hole_cols = 4;

// Distance between holes, in mm.
hole_padding = 3;

/* [Watering tube/indicator] */

// Enable or disable the watering tube attachment.
watering_tube = false;

// Diameter of the watering tube attachment top, in mm.
watering_tube_top = 11.7;

// Diameter of the watering tube attachment bottom, in mm.
watering_tube_bottom = 11.7;

// Height of the watering tube attachment, in mm.
watering_tube_height = 5;

// Relative position of the watering tube attachment, between 0 and 1.
watering_tube_position = 13/16;

/* [Expert] */

// Quality
$fn=64;

// Pole drainage hole adjustment.
diff = 0.1;

module pole(cent = 0) {
    translate([diam/2*poles_center*(1-cent),0, thickness-diff])
        union(){
            cylinder(r1= pole_diam_top/2, r2= pole_diam_bottom/2, h= pole_height+diff);

        if(cent==0)
            translate([0,0,pole_height+diff]) {
                difference(){
                        cylinder(r1= pole_diam_bottom/2, r2= pole_diam_bottom/2, h=pole_stilt_height);
                        cylinder(r1= pole_diam_bottom*3/8, r2=pole_diam_bottom*3/8, h=pole_stilt_height);
                        cube([pole_diam_bottom,pole_diam_bottom,pole_stilt_height]);
                    }
                }
            }
}

module pole_in(cent = 0){
    translate([diam/2*poles_center*(1-cent),0, -diff]) cylinder(r1= pole_diam_top/2-thickness/2, r2= pole_diam_bottom/2-thickness/2, h= pole_height+diff);

    translate([diam/2*poles_center*(1-cent),0,pole_height-3]) rotate([0,90,0]) scale([1,1/center_pole_scale,1]) translate([0,0,-pole_diam_top/2]) cylinder(r = pole_hole/2, h = pole_diam_top);
    translate([diam/2*poles_center*(1-cent),0,pole_height-3]) rotate([90,0,0]) scale([1/center_pole_scale,1,1]) translate([0,0,-pole_diam_top/2]) cylinder(r = pole_hole/2, h = pole_diam_top);

    if(cent==0)
        translate([diam/2*poles_center*(1-cent),0,pole_height-3]) rotate([0,0,0]) translate([0,0,-pole_diam_top/2]) cylinder(r = pole_hole/2, h = pole_diam_top);
}

difference(){
    union(){
        cylinder(r=diam/2, h = thickness);
        scale([center_pole_scale,center_pole_scale,1])
            pole(cent = 1);

        for(i=[1:4])
            rotate([0,0,i*90+45])
                pole();

        if(watering_tube)
            translate([-diam/2*watering_tube_position, 0, 0]) cylinder(r1=(watering_tube_top+thickness)/2, r2=(watering_tube_bottom+thickness)/2, h=watering_tube_height);
    }

    for(i=[0:(pole_height/(pole_hole * center_pole_scale))-2])
        translate([0,0,i*-(pole_hole * center_pole_scale)])
            scale([center_pole_scale,center_pole_scale,1])
                pole_in(cent = 1);
    for(i=[1:4])
        rotate([0,0,i*90+45])
            pole_in();

    for(i=[1:4])
        rotate([0,0,i*90]) {
            translate([-diam/2*poles_center,hole_padding,-diff])
                for(j=[1:hole_rows])
                    for(k=[1:hole_cols])
                        translate([((j-(hole_rows/2))*(hole+hole_padding)),(k-1-(hole_cols/2))*(hole+hole_padding), 0]) {
                            cylinder(r= hole/2, h= thickness + 2*diff);
                        }
        }

    if(watering_tube)
        translate([-diam/2*watering_tube_position, 0, -diff]) cylinder(r1=(watering_tube_top)/2, r2=(watering_tube_bottom)/2, h=watering_tube_height+2*diff);
}
```


[User]
I'm trying to design a modular shelving system based on a hexagonal grid, and I need a bracket to connect the shelves. I've seen a few designs out there, but I want to make something customizable.

The core of the bracket should be based on a rectangular prism with a smaller rectangular prism removed from the front. This creates a U-shape or a C-shape. I'm imagining using multiple instances of this bracket, rotated around the z-axis, to form a triangle with a center cylinder. I need to be able to choose between having two or three of these brackets forming the larger piece, and the center cylinder needs to be a triangular prism that fills in the interior space.

Here are the parameters I'd like to be able to control:

*   `width`: This is the width of the gap in the protruding bits (the inner rectangle of the U/C-shape).
*   `depth`: This is the length of the protruding bits (the inner rectangle of the U/C-shape)
*   `thickness`: This is the thickness of the material (the difference in dimensions between the outer and inner rectangle of the U/C-shape)
*   `height`: This is the overall height of the bracket.
*   `two_or_three`: This parameter lets the user select whether two or three of the U/C-shapes will be generated and assembled into the bracket
*   `outer_width`: This is automatically calculated to be `width+thickness`
*    `outer_depth`: This is automatically calculated to be `depth+(thickness/2)`
*   `travel`: This is automatically calculated and should determine the distance from the center at which the U/C-shapes are placed. It is computed as `(outer_depth/2)+(sqrt(3)*outer_width)/6`

The brackets should be centered on the origin and rotated appropriately. The triangular prism at the center needs to have a radius equal to `sqrt(3)*outer_width/3` and be aligned with the center of the brackets with a rotational offset of 30 degrees around the z-axis.

I'd like the code to be well-documented and use variables for all the key parameters. It would be awesome if you could write the code for me! I don't think I need any libraries for this one since it's all primitive shapes.

[Assistant]
hex_shelving_bracket.scad:
```
/*

Hex Shelving Bracket

Revision History
- Patrick McGorrill 08/2019 - first version

This work is licensed under a
Commons Attribution-ShareAlike 4.0 International License.
To view a copy of the license, visit
https://creativecommons.org/licenses/by-sa/4.0/

*/

// this sets the width of the gap in the protruding bits
width = 7.5;

// this sets the length of the protruding bits
depth = 16.5;

// this sets the thickness of the shape
thickness = 4;

// this sets the height of the shape
height = 10;

//this sets whether the piece will have two or three protruding bits
two_or_three=2;// [1:Two, 2:Three,]

outer_width = width+thickness;

outer_depth = depth+(thickness/2);

travel = (outer_depth/2)+(sqrt(3)*outer_width)/6;

// this "bracket" is the base shape of the design
// a rectangular prism minus a smaller rectangular prism

module bracket(){
difference(){
    cube([outer_width,outer_depth,height],center=true);
    translate([0,thickness/4+1,0])
        cube([width,depth,height+1], center=true);
}
}

translate(v=[0,0,height/2]){

// for two or three iterations, we make the bracket shape and
// rotate it by 120 degrees around the z axis
// also we move the bracket shape, along its y axis, out from
// the center "travel" number of units so they form a triangle
// with sides roughly "outer_width" long

    for (i=[0:two_or_three])
        rotate(a=[0,0,i*120])
        translate(v=[0,travel,0])
        bracket();

// a triangular cylinder to fill in the center

    rotate(a=[0,0,30])
        cylinder(h=height, r=sqrt(3)*outer_width/3, center=true, $fn=3);
}
```