[User]
Hi, I'm looking to create a rain cover for my bike's steering head bearing, which is surprisingly exposed to the elements. I've got a design in mind that I'd like to be parametric, so it can be easily adjusted for different bikes.

Essentially, the cover will sit beneath the steering tube spacers and over the bearing. It's a bit of a complex shape, so I've got some key measurements and design features:

*   **Steering Tube Spacers OD:** This is the outer diameter where the cover needs to fit underneath. Currently, it's 36.1 mm.
*   **Bearing (Curved) Part OD:** This is the outer diameter of the bearing area, which the cover needs to extend over. It's 45 mm.
*   **Flange OD:** Below the spacers, there's a narrower section. The outer diameter of this part is 34 mm.
*   **Flange Height:** The height of the inward flange that steps down from the spacer section is 1.5mm
*   **Flange Step Height:** This is the z-height of the step, 1.5mm
*   **Flange Width:** That is the difference between the radius of the steering tube spacers (36.1mm OD) and the flange outer diameter (34mm OD), calculated by `R1-FlangeR`, so it's a delta value, not absolute.
*   **Toroid (Curved) Part:** There is a curved part connecting the two diameters, it's a section of a toroid. The offset to centre of the toroid is `tx=1` and the radius of toroid is `tr` which is calculated from the diameters.
*   **Skirt Height:** Below the curve, there's an overhang or "skirt" that extends down for extra protection. It's about 3mm high.
*    **Skirt Taper:** The skirt also tapers inwards. The taper is calculated based on the skirt height (SkirtH/3).
*   **Slope Height:** The height of the sloped section up to the point where the curved part starts, calculated based on `OR` radius.

I'd like the design to be parametric, so I can adjust the dimensions as needed using variables like `D1`, `D2`, `FlangeD`, `FlangeH`, `FlangeZ`, `tx`, `SkirtH`, `SkirtTaper`, and `SlopeH`. I would also like a `ShowCrossSection` parameter which, when set to 1, shows a 90 degree section of the cover, for testing the fit. When set to 0, the full 360 degree cover is shown. This parameter affects the `Angle` variable which will be either 90 or 360 degrees.

Ideally, the design would use `rotate_extrude` and `difference` functions to create the shape. I'd like it to be able to adjust the polygon profile of the part and remove the toroid shape, as shown in the code I've been using, below.

```
//rain Cover for bike steering head top bearing
// Astonishingly the bearing has the part line on the top surface with no cover, so
// rain runs straight in to it.

// First part made from ABS cracked a little after a while, maybe from hoop-stress or grease, so made with nylon 2nd time

//sjb

/* [All] */
//.n.b Thingiverse customizer doesn't accept angle to rotate_extrude, only360
ShowCrossSection=0; //[0:Full 360 deg Cup, 1:90 deg Section for Fitting]

// View, 90deg section to test fit
Angle = (ShowCrossSection)  ? 90 : 360; //crosssection, full cup

// steering tube spacers OD
D1= 36.1 ;
R1= D1/2 ;  // steering tube spacers radius

// Bearing (curved) part OD
D2= 45;
R2= D2/2;

// OD of narrow part below spacers
FlangeD= 34;
FlangeR= FlangeD/2;
//height of inward flange
FlangeH= 1.5;
// position of step
FlangeZ=1.5;

FlangeW=R1-FlangeR;

dR=R2-R1;
OR=dR+2;

//offset to centre of toroid (curve) part
tx=1;
tr= dR-tx; //radius of toroid   part

//Skirt is overhang part below the curve
SkirtH=3;
SkirtTaper=SkirtH/3;
SlopeH=OR*1.2;

/* [Hidden] */

$fn=50;

rotate_extrude(angle = Angle, convexity = 2)
  translate([R1,0,0])
    difference() {
      polygon([ //make the straight lines profile of the shape
         [0,0] , [0,-FlangeZ-tr], [-FlangeW,-FlangeZ-tr], [0, -tr-FlangeZ-FlangeH],
         [0,-SlopeH], [1,-SlopeH], [OR,0], [OR,0],
         [OR-SkirtTaper,SkirtH],
         [dR,SkirtH], [dR,0],
         [tx,-tr] , [0, -tr] , [0,0] ]);
      translate([tx, 0,0]) circle(r=tr);  //cut the curve out
    }

```

I don't need any external libraries for this. Could you generate the OpenSCAD code for this design? Thanks!

[Assistant]
SteeringHeadCover1.scad:
```
//rain Cover for bike steering head top bearing
// Astonishingly the bearing has the part line on the top surface with no cover, so
// rain runs straight in to it.

// First part made from ABS cracked a little after a while, maybe from hoop-stress or grease, so made with nylon 2nd time

//sjb

/* [All] */
//.n.b Thingiverse customizer doesn't accept angle to rotate_extrude, only360
ShowCrossSection=0; //[0:Full 360 deg Cup, 1:90 deg Section for Fitting]

// View, 90deg section to test fit
Angle = (ShowCrossSection)  ? 90 : 360; //crosssection, full cup

// steering tube spacers OD
D1= 36.1 ;
R1= D1/2 ;  // steering tube spacers radius

// Bearing (curved) part OD
D2= 45;
R2= D2/2;

// OD of narrow part below spacers
FlangeD= 34;
FlangeR= FlangeD/2;
//height of inward flange
FlangeH= 1.5;
// position of step
FlangeZ=1.5;

FlangeW=R1-FlangeR;

dR=R2-R1;
OR=dR+2;

//offset to centre of toroid (curve) part
tx=1;
tr= dR-tx; //radius of toroid   part

//Skirt is overhang part below the curve
SkirtH=3;
SkirtTaper=SkirtH/3;
SlopeH=OR*1.2;

/* [Hidden] */

$fn=50;

rotate_extrude(angle = Angle, convexity = 2)
  translate([R1,0,0])
    difference() {
      polygon([ //make the straight lines profile of the shape
         [0,0] , [0,-FlangeZ-tr], [-FlangeW,-FlangeZ-tr], [0, -tr-FlangeZ-FlangeH],
         [0,-SlopeH], [1,-SlopeH], [OR,0], [OR,0],
         [OR-SkirtTaper,SkirtH],
         [dR,SkirtH], [dR,0],
         [tx,-tr] , [0, -tr] , [0,0] ]);
      translate([tx, 0,0]) circle(r=tr);  //cut the curve out
    }
```


[User]
I'd like to design a simple interlocking puzzle, kind of like a 3D version of a tangram, but with rod-shaped pieces. I have a basic idea for the shape of the pieces and how they fit together, and I'd also like to animate the solution, sort of like an assembly instruction video.

Each puzzle piece is essentially a long rectangular prism (a rod), with two cylindrical pegs on one of the long sides. The pegs will fit into corresponding cutouts on other pieces. I want the pegs to be slightly smaller than the cutouts, so there's a tiny bit of play. Also, the pegs only extend a little bit from the side of the rod, not all the way through.

For the animation, I would like to be able to have different colors to show which piece is new, which pieces are moving, and which are just temporary support.

For the sizing, I'd like the rod to have a base dimension (let's call it `arrete`) and the length to be a multiple of that, say 7 times `arrete`. The cylinder's diameter should be slightly less than `arrete` and its height about half of `arrete`. The space around the pegs also needs to be a little larger, let's call that `marge`. I guess for now, I'll just make that a value, like 0.1, that I can tweak.

I'm envisioning a specific final puzzle configuration, but I want to be able to switch between animating the solution and printing the individual pieces.  I'm thinking we could define a "mode" variable, with "animation" and "pieces" as the options.

For the animation, I need to control the puzzle piece placement step by step, and have colors to show the new piece, existing moving piece and temporary piece. This probably requires using the time variable `$t` to step through the process. I'd want maybe 18 phases in total, using the `floor($t*nb_phase)` to define the current phase. And for a smooth movement, I will also need to use `sous_phase`, defined by `($t - phase * 1/(nb_phase))* nb_phase`

The initial setup would have two base pieces.  Then a new piece is added. Then two more pieces together, then other pieces around them, rotating into place and finally some pieces going down and a part of the piece is moving before it gets to its final place.
I also need a way to move multiple pieces in the last steps.

Finally, for printing, I'll need to arrange all the pieces in an easy-to-print layout. I would want some padding around each piece.

Can you generate an OpenSCAD file (or files) to do this?

[Assistant]
puzzle_pieces_anime.scad:
```
/* [Size] */
// size of the rod
arrete = 10;
longueur = 7*arrete ;

// margin used for the space between the stud
marge = 0.1 ;

$fn=16 ;

/* [mode] */
mode = "animation" ; // [animation, pieces]

// color for new piece
color_new = "red" ;
// color for moving existing piece
color_move = "green" ;
// color for building piece
color_temp = "pink" ;

/* [Hidden] */
nb_phase = 18 ;
phase = floor($t*(nb_phase)) ;
sous_phase = ($t - phase * 1/(nb_phase))* nb_phase ;

module piece(fin=false)
{
    cube ([longueur,arrete,arrete]) ;
    translate([ 3*arrete/4, arrete/2, arrete-marge]) cylinder(r=arrete/4-marge, h=arrete/2) ;
    if (fin == false)
       translate([25*arrete/4, arrete/2, arrete-marge]) cylinder(r=arrete/4-marge, h=arrete/2) ;
}

if (mode == "animation")
{
   color(phase==0 && $t!=0 ? color_new : undef) translate([1*arrete,2*arrete,7*arrete]) rotate([0,+90,0]) piece() ;
   color(phase==0 && $t!=0 ? color_new : undef) translate([4*arrete,2*arrete,0]) rotate([0,-90,0]) piece() ;

   if (phase >= 1 || $t==0) {
      color(phase ==1 ? color_new : undef) translate([3*arrete,-2*arrete,1*arrete]) rotate([0,0,90]) piece() ;
   }

   if (phase >= 2 || $t==0)
   {
      color(phase==2 ? color_new : undef) translate([6*arrete,2*arrete,0]) rotate([0,-90,0]) piece() ;
      color(phase==2 ? color_new : undef) translate([5*arrete,-2*arrete,1*arrete]) rotate([0,0,90]) piece() ;
   }

   if (phase >= 3 || $t==0 ) color(phase==3 ? color_new : undef) translate([0*arrete,+4*arrete,2*arrete]) rotate([+90,0,0]) piece() ;

   if (phase >= 4 || $t==0) color(phase==4 ? color_new : undef) translate([0*arrete,+1*arrete,3*arrete]) rotate([-90,0,0]) piece() ;

   if (((phase >= 5) && (phase < 12)) || (phase > 15) || $t==0)
   {
      color(phase==5 ? color_new : undef) translate([5*arrete,-2*arrete,3*arrete]) rotate([0,0,90]) piece() ;
      color(phase==5 ? color_new : undef) translate([3*arrete,-2*arrete,3*arrete]) rotate([0,0,90]) piece() ;
   }

   if (phase == 6)
   {
      color(color_new) translate([4*arrete,(-5+3*sous_phase)*arrete,6*arrete]) rotate([180,0,90]) piece() ;
      color(color_new) translate([2*arrete,(-5+3*sous_phase)*arrete,6*arrete]) rotate([180,0,90]) piece() ;
   }
   if (((phase > 6) && (phase < 12)) || (phase > 15) || $t==0)
   {
      translate([4*arrete,-2*arrete,6*arrete]) rotate([180,0,90]) piece() ;
      translate([2*arrete,-2*arrete,6*arrete]) rotate([180,0,90]) piece() ;
   }

   if (phase == 7)
   {
      if (sous_phase < 0.5) color(color_new) translate([(-5 + 10*sous_phase)*arrete,+0.5*arrete,5*arrete]) rotate([-90,0,0]) piece() ;
      if (sous_phase >= 0.5) color(color_new) translate([0*arrete,(sous_phase)*arrete,5*arrete]) rotate([-90,0,0]) piece() ;
   }
   if (phase > 7 || $t==0) translate([0*arrete,+1*arrete,5*arrete]) rotate([-90,0,0]) piece() ;

   if (phase == 8) color(color_new) translate([(-1+2*sous_phase)*arrete,0,7*arrete]) rotate([0,+90,0]) piece() ;
   if (phase > 8 || $t==0) translate([1*arrete,0,7*arrete]) rotate([0,+90,0]) piece() ;

   if (phase == 10)
      color(color_new) translate([4*arrete,(sous_phase-1)*4*arrete,0]) rotate([0,-90,0]) piece() ;
   if (phase > 10 || $t==0) translate([4*arrete,0,0]) rotate([0,-90,0]) piece() ;

   if (phase == 11) color(color_new) translate([(8-2*sous_phase)*arrete,0,0]) rotate([0,-90,0]) piece() ;
   if (phase > 11 || $t==0) translate([6*arrete,0,0]) rotate([0,-90,0]) piece() ;

   if (phase == 12)
      translate ([0,(2*sous_phase)*arrete,0]) color(color_move)
   {
      translate([5*arrete,-2*arrete,3*arrete]) rotate([0,0,90]) piece() ;
      translate([3*arrete,-2*arrete,3*arrete]) rotate([0,0,90]) piece() ;
      translate([4*arrete,-2*arrete,6*arrete]) rotate([180,0,90]) piece() ;
      translate([2*arrete,-2*arrete,6*arrete]) rotate([180,0,90]) piece() ;
   }
   if ((phase > 12) && (phase < 15))
      translate ([0,2*arrete,0])
   {
      translate([5*arrete,-2*arrete,3*arrete]) rotate([0,0,90]) piece() ;
      translate([3*arrete,-2*arrete,3*arrete]) rotate([0,0,90]) piece() ;
      translate([4*arrete,-2*arrete,6*arrete]) rotate([180,0,90]) piece() ;
      translate([2*arrete,-2*arrete,6*arrete]) rotate([180,0,90]) piece() ;
   }

   if (phase == 13)
   {
      if (sous_phase < 0.5) color(color_new) translate([0*arrete,(-2+2*sous_phase)*arrete,4*arrete]) rotate([-90,0,0]) piece() ;
      if (sous_phase >= 0.5) color(color_new) translate([0*arrete,-1*arrete,(5-2*sous_phase)*arrete]) rotate([-90,0,0]) piece() ;
   }
   if (phase > 13 || $t==0) translate([0*arrete,-1*arrete,3*arrete]) rotate([-90,0,0]) piece() ;

   if (phase == 14)
   {
      if (sous_phase < 0.5) color(color_new) translate([-(0.5-sous_phase)*10*arrete,5*arrete,4*arrete]) rotate([+90,0,0]) piece() ;
      if (sous_phase >= 0.5) color(color_new) translate([0*arrete,(6-2*sous_phase)*arrete,4*arrete]) rotate([+90,0,0]) piece() ;
   }
   if (phase > 14 || $t==0) translate([0*arrete,+4*arrete,4*arrete]) rotate([+90,0,0]) piece() ;

   if (phase == 15)
      translate ([0,2*(1-sous_phase)*arrete,0]) color(color_move)
   {
      translate([5*arrete,-2*arrete,3*arrete]) rotate([0,0,90]) piece() ;
      translate([3*arrete,-2*arrete,3*arrete]) rotate([0,0,90]) piece() ;
      translate([4*arrete,-2*arrete,6*arrete]) rotate([180,0,90]) piece() ;
      translate([2*arrete,-2*arrete,6*arrete]) rotate([180,0,90]) piece() ;
   }

   if (phase == 16 ) color(color_new) translate([(sous_phase-1)*6*arrete,-1*arrete,5*arrete]) rotate([-90,0,0]) piece(true) ;
   if (phase > 16  || $t==0) translate([0*arrete,-1*arrete,5*arrete]) rotate([-90,0,0]) piece(true) ;

   // temporary piece for supporting the puzzle
   if (phase>=1 && phase<=8) color(color_temp) translate([0, -arrete, 0]) rotate([90,0,0]) piece() ;
   if (phase==9) color(color_temp) translate([sous_phase*4*arrete, -arrete, 0]) rotate([90,0,0]) piece() ;
   if (phase>=10 && phase<=11) color(color_temp) translate([4*arrete, -arrete, 0]) rotate([90,0,0]) piece() ;
}
else
{
   // Generate pieces for printing
   for (i=[0:1])
      for (j=[0:8])
         translate ([i*(longueur+10),j*15,,0]) piece(((i+j)==0)) ;
}

```


[User]
I need an OpenSCAD design for a jig to cut PTFE tubing for 3D printer extruders. I'd like it to be customizable and similar to the existing design I have, which I will describe.

The jig has two main parts: a main length-cutting jig and an end-truing jig attached to the side of it. The length-cutting jig is a long block with a hole running lengthwise through it for the PTFE tube. There’s a diagonal cut that goes through the top side. There are some identifying text elements engraved into the top. The jig also has an optional middle and end retainer to keep the tubing secure. A bevel is provided on two of the bottom edges. There is a slot cut from the top, lengthwise, to allow for easier removal of the PTFE tube. The end-truing jig is a smaller block attached to the main jig. It has a tube-sized hole through it. It also has diagonal cut and bottom bevels similar to the main jig, and top slots going through it.

I need the following parameters to be customizable:

*   `tube_length`: The desired length of the PTFE tube (float, in mm).
*   `tube_diameter`: The outer diameter of the PTFE tube (float, in mm).
*   `middle_retainer`: A boolean indicating whether or not to include the middle retainer (yes/no option).
*   `end_retainer`: A boolean indicating whether or not to include the end retainer (yes/no option).

The design should derive the following values:

*   `tube_radius`: Half the tube diameter.
*  `hole_radius`: Calculated radius of the hole for the PTFE tubing, compensating for the polygon sides using `cos(180/$fn)`. Note that `$fn` should be a parameter for the entire design.
*   `mid_support`: Boolean value derived from the `middle_retainer`.
*   `end_pocket`: A numeric value based on if the `end_retainer` is included. Should be `2.5` if yes, otherwise `0`.
*   `oa_len`: Overall length of the main jig, equal to `tube_length + 2.5`.
*   `oa_wth`: Overall width of the jig, equal to `tube_radius * 6.5`.
*   `oa_hgt`: Overall height of the jig, equal to `tube_radius * 4.5`.

The main length cutting jig should be a difference of:

*   A cube with dimensions of `[oa_len, oa_wth, oa_hgt]`
*   A cylinder centered through the cube to form the tube hole (using the `hole_radius` and `tube_length` + a small buffer of `2.5` and rotated by `[0,90,0]`).
*  An angled hollow cut that goes through the top. The cut should be a rotated cube with the dimensions `[oa_len-5-end_pocket, oa_wth, oa_wth]` and the support should be a box with `[2.5, oa_wth+.01, oa_wth+.01]`.
*  Identifying text should be placed on the angled face, displaying both the tube length and diameter.
*  A top slot, `[oa_len+.01, tube_radius, oa_hgt]` in size, offset by half the height and a short amount of vertical space.
* Two bottom edge bevels that use `cube()` and `rotate()` transformations for creation.
* Optional end retainers, if needed.

The end truing jig should also be a difference of:

* A cube with dimensions `[oa_wth, oa_wth, oa_hgt]` rotated by 90 degrees on the Z axis. It should be placed adjacent to the length cutting jig.
* A centered cylinder to form the hole for the PTFE tube, using `hole_radius` and `oa_wth` + a small buffer of `0.01`, and rotated by `[0,90,0]`.
* An angled hollow cut that goes through the top, similar to the length cutting jig but with dimensions `[oa_wth-2.5, oa_wth, oa_wth]`.
* Top slots, using a `for()` loop and `rotate()` transformation to position four equally spaced slots around the block, with a size of `[oa_wth+.01,tube_radius,oa_hgt]`.
* Two edge bevels, similar to the ones in the length cutting jig, created through rotation of `cube()` elements.

Could you generate this for me? I don't need any extra libraries.

[Assistant]
PTFE_extruder_tube_jig.scad:
```
// OpenSCAD file to create custom sized cutting jig for PTFE tubes used in 3D printer extruders.
// Setup for use with Thingiverse.com Customizer.
//
// preview[view:south east, tilt:top diagonal]
//
// Original code created August 23, 2019 by Allan M. Estes
// Posted to Thingiverse September 9, 2019. All rights reserved.

$fn=12*2;

// Customizer values:

tube_length = 46.4;
tube_diameter = 4.125;
middle_retainer = "yes";//[yes,no]
end_retainer = "yes";//[yes,no]

// Derived values:

tube_radius = tube_diameter/2;
hole_radius = tube_radius/cos(180/$fn);    // adjust diamter for holes, see https://en.wikibooks.org/wiki/OpenSCAD_User_Manual/undersized_circular_objects
mid_support = middle_retainer=="yes";
end_pocket = end_retainer=="yes"?2.5:0;
oa_len = tube_length + 2.5;
oa_wth = tube_radius * 6.5;
oa_hgt = tube_radius * 4.5;

// This is the length jig
difference() {
    cube([oa_len,oa_wth,oa_hgt],true);

    // hole for tube
    translate([2.5,0,0]) rotate([0,90,0]) cylinder(r=hole_radius,h=tube_length+2.5,center=true);

    // angled hollow
    translate([end_pocket/2,0,oa_wth*sqrt(2)/2-tube_radius/3]) rotate([45,0,0]) difference() {
        cube([oa_len-5-end_pocket,oa_wth,oa_wth],true);
        if (mid_support) cube([2.5,oa_wth+.01,oa_wth+.01],true);
    }

    // identifying text
    translate([0,0,-tube_radius/3]) rotate([45,0,0]) translate([0,tube_radius*2.5,-.6]) linear_extrude(height=.61) {
        translate([-(oa_len-5)/4,0,0]) text(str(tube_length),size=hole_radius*1.5,valign="center",halign="center");
        translate([(oa_len-5)/4,0,0]) text(str(tube_radius*2),size=hole_radius*1.5,valign="center",halign="center");
    }

    // lengthwise top slot
    translate([0,0,oa_hgt/2-1]) cube([oa_len+.01,tube_radius,oa_hgt],true);

    // bottom edge bevels
    for(a=[0,180]) rotate([0,0,a]) {
        translate([oa_len/2-tube_radius/3,-(oa_wth+.01)/2,-oa_hgt/2]) rotate([0,35,0])
            cube([tube_radius,oa_wth+.01,oa_hgt]);
        translate([-(oa_len+.01)/2,oa_wth/2-tube_radius/3,-oa_hgt/2]) rotate([-35,0,0])
            cube([oa_len+.01,tube_radius,oa_hgt]);
    }

    // optional hold down for end of tube
    if (end_pocket>0) translate([-oa_len/2+2.5,-(tube_radius*1.5)/2,0]) cube([end_pocket*2,tube_radius*1.5,oa_hgt]);
}

// this is the end truing jig that gets tacked onto the length jig
translate([-oa_len/2-oa_wth/2+2,0,0]) rotate([0,0,90]) difference() {
    cube([oa_wth,oa_wth,oa_hgt],true);

    // hole for tube
    rotate([0,90,0]) cylinder(r=hole_radius,h=oa_wth+.01,center=true);

    // angled hollow
    translate([0,0,oa_wth*sqrt(2)/2-tube_radius/3]) rotate([45,0,0])
        cube([oa_wth-2.5,oa_wth,oa_wth],true);

    // top slots and bottom edge bevels
    for(a=[0:90:270]) {
        // slots
        if (a<91) rotate([0,0,a]) translate([a/90*oa_wth/-2,0,oa_hgt/2-1]) cube([oa_wth+.01,tube_radius,oa_hgt],true);
        // bevels
        rotate([0,0,a]) translate([oa_wth/2-tube_radius/3,-(oa_wth+.01)/2,-oa_hgt/2]) rotate([0,35,0])
            cube([tube_radius,oa_wth+.01,oa_hgt]);
    }
}
```


[User]
Hey! So, I'm looking to get a parametric design for a windsurfing mast plug. I found this other one online, but I think I could do with some modifications and a more flexible design. Basically, I need a plug that fits into the open end of a windsurfing mast to keep water from filling it.

Here's what I'm thinking for the general structure:

1.  **Plug Body:** The main part of the plug that goes inside the mast. This should be a cylinder with a diameter slightly larger than the mast's inner diameter, so it fits snugly. We should have parameters for both the mast's inner diameter and the plug length, and the plug's diameter should be calculable from the mast's inner diameter and O-ring diameter(s), if used.

2.  **O-ring Grooves:** I want to include one or more grooves on the plug body for O-rings to create a watertight seal. I should be able to specify the diameter of the O-rings and their positions along the plug's length. The grooves themselves should be small semi-circles in a vertical cut of the plug.

3.  **Top Cap:** There should be a cap on top of the plug that sits flush with the mast's outer edge. I would need to be able to specify the height of this cap and the mast's outer diameter, so that the cap is sized accordingly. I think it should be a rounded or chamfered cylinder with a bit more thickness towards the outer edge.

4.  **Optional Hole:** I'd like the option of having a hole going through the center of the plug. This would be useful for attaching a rope or something similar. The hole's diameter should be based on the plug's overall diameter, so it always leaves at least 2mm of wall thickness, and the hole depth should match the plug's length.

I'd like this to be fully customizable, with parameters for:

*   `plugLength`:  The length of the plug that goes into the mast.
*   `mastInnerDiameter`: The inside diameter of the mast.
*   `mastOuterDiameter`: The outside diameter of the mast.
*   `capHeight`: The height of the top cap.
*  `oRingDiameter`: The diameter of any O-rings used. If 0, then no O-rings should be included.
*  `oRingPos1`, `oRingPos2`, etc.: the positions of the O-rings. I'd like to have at least 2 O-rings with independently definable positions, and it would be nice to have a way of adding more if necessary.
*   `useHole`: A boolean flag to enable or disable the central hole.

It'd be great if you could handle all the math for calculating the plug diameter based on the mast diameter and O-ring diameter so it's a perfect fit! And make sure the grooves and hole dimensions are calculated to allow 2mm wall thickness between the hole and plug edge (when a hole is used) and between the grooves and plug edge.

I'm not sure how complex you can make this, but the more parameters the better! I'd really like to be able to modify this to fit any of my masts. I think that's it for now. Let me know if you need any more details!

[Assistant]
mastplugg.scad:
```
/*
Awesome customizable mast plug makes a perfect plug for your mast given its dimensions.

Written by Torkel Borjeson 2019-09-09 <torkelb@gmail.com>
https://www.thingiverse.com/torkel_b
*/
echo(version=version());
plugLength = 40; // Total length of plug (and depth of hole)
mastInnerDiameter = 25.6; // Inside diameter of mast at the top, used to calculate diameter of plug together with O-ring diameter
mastOuterDiameter = 30; // Outer diameter of mast at the top
capHeight = 5*1;  // Height of material on top of plug
oRingDiameter = 3; // Diameter of supplied O-rings, set to zero if no O-rings should be used

oRingPos1 = plugLength/4;
oRingPos2 = plugLength*3/4;
plugDiameter = mastInnerDiameter-oRingDiameter+oRingDiameter/8;
holeDiameter = plugDiameter - oRingDiameter - 4;
useHole = true; // Hole in top or not, hole depth is equal to plug length, hole diameter is set so there is 2 mm thick walls
$fn=80*1;

module plug() {
    difference() {
        cylinder(plugLength, d=plugDiameter, true);
        rotate_extrude(convexity = 10) {
            translate([plugDiameter/2, oRingPos1, 0]){
                circle(r = oRingDiameter/2, $fn = 100);
            }
        }
        rotate_extrude(convexity = 10) {
            translate([plugDiameter/2, oRingPos2, 0]){
                circle(r = oRingDiameter/2, $fn = 100);
            }
        }
    }
}

module cap() {
    cylinder(capHeight, d=mastOuterDiameter-2*capHeight, true);
    difference() {
        rotate_extrude(convexity = 10) {
            translate([mastOuterDiameter/2-capHeight, capHeight, 0]){
                circle(r = capHeight, $fn = 100);
            }
        }
        translate([0, 0, capHeight])
            cylinder(capHeight, d=2*mastOuterDiameter, false);
    }
}

module hole() {
    translate([0, 0, -0.1])
        cylinder(plugLength, d = holeDiameter, true);
}

module solidPlug() {
    cap();
    translate([0, 0, capHeight]) {
        plug();
    }
}

if (useHole) {
    difference() {
        solidPlug();
        hole();
    }
} else {
    solidPlug();
}

```


[User]
I need help designing a clip to attach my Kryptonite U-lock to my bike's rear rack. I've got some measurements, and I'd like to be able to adjust them easily in the code. I'm thinking I'll need to print at least two of these clips.

Here's how it should work: the clip will essentially have two circular cutouts, one for the rack and one for the U-lock, connected by a bar. I need to be able to control the radius of both cutouts, as well as the distance between their centers. I'd like control over the overall thickness of the clip too, and also the "clip thickness" which I guess would add material outside of the circle that actually connects to the rack/lock.  Additionally, I need to be able to set the distance from the center of the rack to the center of its circular cutout (same for the lock).

Specifically, here are the parameters I envision:

*   `centerdiff`: The linear distance between the center of the rack-side cutout and the center of the lock-side cutout.
*   `height`: The overall height/thickness of the clip.
*   `bracket_radius`: The radius of the cutout for the bike rack.
*   `lock_radius`: The radius of the cutout for the U-lock.
*   `clip_thickness`: The extra thickness added to the outside of the cutout circles (like, the amount the clip extends beyond where the rack/lock would actually touch).
*   `bracket_center_radius`: The distance between the center of the entire clip assembly and the center of the rack cutout.
*    `lock_center_radius`: The distance between the center of the entire clip assembly and the center of the lock cutout.

The design needs to make it easy to insert the rack and lock. I think that means there needs to be a sort of gap/opening into each cutout on the side. I was thinking that the opening for the lock rail needs to be a bit bigger than its radius to make it easier to slide the lock in. Maybe like 110% of the `lock_radius`?

Finally, I'm going to need two clips, one for each side of the rack (and I assume lock). They should be connected by a thin bar.

Could you generate a parametric OpenSCAD file for this? I don’t have any experience with OpenSCAD libraries, so hopefully that’s fine. I can handle generating the STL files after I get the SCAD.

[Assistant]
bike_lock_clip.scad:
```
//kryptonite u-lock to rear rack clip by Brandon Whaley <redkrieg@gmail.com>
//measure your rack and lock, insert the values of their respective radii below

// linear distance between center of bracket and center of lock rails
centerdiff = 11; // [10:16]
// increase for a wider clip
height = 10; // [5:25]
// measured radius of bike rack bracket
bracket_radius = 5.3; // [4:9.5]
// measured radius of lock
lock_radius = 8.0; // [4:9]
// increase to add material to the clip
clip_thickness = 3; // [2:5]
// distance between center of rack and center of rack rail
bracket_center_radius = 65; // [45:69.8]
// distance between center of lock and center of lock rail
lock_center_radius = 58.85; // [54:82]
center_radius = (bracket_center_radius + lock_center_radius) / 2;
$fn=100; //smoother circles

module clip() //this is one side of the full clip
{
    difference()
    {
        union()
        {
            translate([-centerdiff, 0, 0]) //bracket side of clip
            {
                cylinder(height, r=bracket_radius + clip_thickness, center=true);
            }
            translate([centerdiff, 0, 0]) //lock side of clip
            {
                cylinder(height, r=lock_radius + clip_thickness, center=true);
            }
            cube([centerdiff + clip_thickness, bracket_radius*2, height], center=true); //connector between clips
        }
        union()
        {
            translate([-centerdiff, 0, 0]) //cutout for bracket rail
            {
                cylinder(height*2, r=bracket_radius, center=true);
            }
            translate([centerdiff, 0, 0]) //cutout for lock rail
            {
                cylinder(height*2, r=lock_radius, center=true);
            }
            translate([-(centerdiff+bracket_radius+clip_thickness/2), 0, 0]) //opening for bracket insertion
            {
                cylinder(height*2, r=bracket_radius, center=true);
            }
            translate([(centerdiff+lock_radius+clip_thickness/2), 0, 0]) //opening for lock insertion
            {
                cylinder(height*2, r=lock_radius*1.10, center=true); //change 1.10 here to increase/decrease opening for lock rail
            }
        }
    }
}
union() {
    cube([clip_thickness, center_radius*2, height], center=true); //connector between sides
    //these rotate the clips such that the distance from 0 to the center of the bracket clip is bracket_center_radius.  because of the center_radius translation, this results in the lock clip being correctly centered
    translate([0,-center_radius,0]) rotate([0, 0, asin((bracket_center_radius - center_radius)/centerdiff)]) clip();
    translate([0,center_radius,0]) rotate([0, 0, -asin((bracket_center_radius - center_radius)/centerdiff)]) clip();
}
```


[User]
Hey, I'm looking to design a holder for my EasyBBQ digital Bluetooth thermometer and its six probes. I've seen some designs online, but I'd like to create one tailored to my preferences, and I'd like to use OpenSCAD for this.

Essentially, I need a rectangular box with six cylindrical holes to hold the thermometer probes. Here's what I'm thinking:

*   **Overall Box:**
    *   The box needs to have inner dimensions for holding the thermometer unit itself, and then it'll have some extra width for the probe holes. The inner width should be adjustable, let's call it `InnerWidth`, and the inner depth `InnerDepth`, and the overall height `Height`.
    *   I'd like to specify the wall thickness as `WallThickness` and a separate thickness for the area that contains the probe holes, `ProbeWallThickness`.
*   **Probe Holes:**
    *   There need to be six holes in total, spaced in pairs along the depth of the box. Each probe hole should have a diameter that's slightly larger than the probe diameter; let's call this `ProbeHoleDiameter`.
    * The probe holes should be offset from the walls by a distance.
*   **Rounding:**
    *   I'd like the edges of the box to be rounded to add some nice aesthetics. This rounding should be specifiable via a parameter `SmothnessRadius`.

I think it would be best if everything were parameterized so I can adjust these dimensions later if needed. Could you provide me with the OpenSCAD code for this, using `minkowski` for the rounding?

I'm not sure how to generate that exactly in code. I'd prefer not to rely on external libraries beyond the standard OpenSCAD features if possible.

[Assistant]
EasyBBQ_Organizer.scad:
```
//  Thing Name: EasyBBQ Digital Thermometer Organizer
// Description: Used to hold the EasyBBQ digital Bluetooth 6-probe Thermometer,
// 	            or similar device, along with all 6 probes.
//  Created by: Doug Krahmer
//  Created on: 2019-09-12

// With $fn = 30 rendering takes 8 minutes (4Ghz i7)
// With $fn = 60 rendering takes 2 hours, 15 minutes (4Ghz i7)

$fn = 30;

InnerWidth = 95;
InnerDepth = 100;
Height = 50;

WallThickness = 3;
ProbeWallThickness = 15;

ProbeHoleDiameter = 4.5;

SmothnessRadius = 1.25;

main();

module main()
{
	Width = InnerWidth + ProbeWallThickness * 2;
	Depth = InnerDepth + WallThickness;

	minkowski()
	{
		difference()
		{
			cube([Width - SmothnessRadius * 2, Depth - SmothnessRadius * 2, Height - SmothnessRadius * 2]);

			translate([ProbeWallThickness - SmothnessRadius * 2, 0 - SmothnessRadius, WallThickness - SmothnessRadius * 2])
				cube([Width - ProbeWallThickness * 2 + SmothnessRadius * 2, Depth - WallThickness + SmothnessRadius, Height - WallThickness + SmothnessRadius * 2]);

			translate([-SmothnessRadius, -SmothnessRadius, -SmothnessRadius])
				AllProbeHoles(Width, Depth);
		}
		sphere(r = SmothnessRadius);
	}
}

module AllProbeHoles(Width, Depth)
{
	ProbeHoleCenterOffset = Depth / 3;

	translate([0, -ProbeHoleCenterOffset, 0])
		ProbeHolePair(Width, Depth);

	ProbeHolePair(Width, Depth);

	translate([0, ProbeHoleCenterOffset, 0])
		ProbeHolePair(Width, Depth);
}

module ProbeHolePair(Width, Depth)
{
	ProbeHole(Width, Depth);
	translate([InnerWidth + ProbeWallThickness, 0, 0])
		ProbeHole(Width, Depth);
}

module ProbeHole(Width, Depth)
{
	translate([ProbeWallThickness / 2, Depth / 2, WallThickness])
		cylinder(h = Height - WallThickness, d = ProbeHoleDiameter + SmothnessRadius * 2);
}

```


[User]
Hey, I'm looking for an OpenSCAD design for a customizable tiny bookcase. I've got a basic idea from this thingiverse project: [https://www.thingiverse.com/thing:3860734](https://www.thingiverse.com/thing:3860734)

I'd like a parametric design that lets me control:

*   The number of shelves.
*   The overall width of the bookcase.
*   The height of each shelf.
*   The depth of each shelf.
*   The height of the base (the area below the bottom shelf).
*   The thickness of the bookcase walls.

The thingiverse description also mentions that the files are licensed under Creative Commons - Attribution - Share Alike license (CC BY-SA 3.0), so I'm okay with you using that in any new designs. I would prefer to avoid libraries, but it is acceptable to use MCAD for any of the standard shapes if that makes your life easier. I will likely use this for 3d printing.

[Assistant]
TinyBookcase-v1.scad:
```
/* Tiny Bookcase
   by Lyl3

Creates a tiny bookcase for the tiny secret books that are scaled to 50%

This code is published at:
https://www.thingiverse.com/thing:3860734
licensed under the Creative Commons - Attribution - Share Alike license (CC BY-SA 3.0)
*/

/* [Basic parameters] */

// The number of shelves in the bookcase
numShelves = 3; // [1:1:10]

// The width of the bookcase (mm)
caseWidth = 50; // [15:1:200]

/* [Advanced parameters] */

// The height of each shelf (mm)
shelfHeight = 24;

// The depth of each shelf (mm)
shelfDepth = 21;

// The height of the base (below the bottom shelf) of the bookcase (mm)
baseHeight = 3; // [0:1:10]

// The width of the walls (mm)
wallWidth = 1.6; // [0.8:0.1:10]

fudge = 0.005 + 0.0;

caseHeight = numShelves*(shelfHeight+wallWidth) + baseHeight + wallWidth;
caseDepth = shelfDepth + wallWidth;

translate([caseHeight/2,-caseWidth/2,caseDepth]) rotate([-90,0,90])
difference() {
  cube([caseWidth,caseDepth,caseHeight]);
  translate([wallWidth,-fudge,-fudge]) cube([caseWidth-2*wallWidth,caseDepth-wallWidth+fudge,baseHeight+fudge]);
  for (i = [1:numShelves]) {
    translate([wallWidth,-fudge,(i-1)*(shelfHeight+wallWidth)+baseHeight+wallWidth]) cube([caseWidth-2*wallWidth, caseDepth-wallWidth+fudge, shelfHeight]);
  }
}
```


[User]
Hey, I'm looking to get a parametric OpenSCAD design for a sphericon generator. I saw this one online a while back, and I’d like to have something similar.  I'm not super familiar with OpenSCAD, so I'll do my best to explain what I need.

Basically, I need a design that can generate three different things:

1.  A full sphericon. This would be a single 3D shape, like if you took two halves and fused them.
2.  A half sphericon, with a hole in the middle for a connecting pin. This will have to be designed to fit a pin generated in #3
3.  The connecting pin itself. This pin can be either a cylinder or a key type of pin.

The generator should have these main parameters:

*   **Diameter:** The overall size of the sphericon.
*   **Side Count:** The number of sides of the base polygon for the sphericon.
*   **Smoothness:**  This controls how smooth the shape will look when rendered. Higher values mean more faces and a smoother look, but it'll probably take longer to render.

There also needs to be a way to choose between generating the full sphericon, half a sphericon with a pin hole, or just the pin itself.

For the half sphericon and pin, these settings are needed:

*   **Pin Type:** Choose between a cylinder pin (allowing rotation after assembly) or a key pin (which requires disassembly to change orientation).
*  **Pin Clearance:** Controls the clearance on the pin diameter.
*   **Pin Depth Difference:** Controls the clearance on the pin depth (the distance of the pin from the overhangs).

For the full sphericon, this is also needed:

*   **Rotation Steps:** The amount to rotate the second half. I want a default value here to make it a proper sphericon, but I'd also like to change it for other purposes.

I'm not including any OpenSCAD code files here, since I'm looking for a complete generation solution for this object and related parts. Do you think this is something that you could help me with?

[Assistant]
SphericonV2.scad:
```
/*==============================================================================*\
	Welcome to my sphericon generator.

	I made this because I got tired of drawing sphericons after the second one.
	I'm a programmer, so in my mind it was impossible to not think about
	automating the drawing of this sort of shape.

	All units are meant to be in mm but I guess you can choose to use imperials
	if you want to keep suffering.

	Hit F6 to generate the half sphericon, and use the settings below to modify
	its properties.
\*==============================================================================*/

//========================Main settings========================
/* [ Main settings ] */

//Size of the sphericon
diameter = 50;

//Number of sides
sidecount = 8;

//Generation complexity (how smooth you want it to be. High values take longer to render)
smoothness = 300;

//========================Settings for fixture pin========================
/* [ Fixture pin ] */

//Set to true to generate sphericon, set to false to generate fixture pin
genSphericon = "yes"; // [yes,no]

//Set to true for cylinder pin, allowing rotation while assembled. Set to false for key pin, requiring desassembly to change face orientations
genCylinder = "no"; // [yes,no]

//clearance of fixture pin on its diameter
clearance = 0.2;

//clearance of fixture pin on its depth (aka the distance to the overhangs)
depthDiff = 2;

//========================Settings for full sphericon========================
/* [ Full sphericon ] */

//set to true to draw full sphericon (not half), useful to visualize the final result or if you have soluble support filament or a resin printer, you could print it in one piece.
drawFull = "yes"; // [yes,no]

//steps of rotation of second half (keep at 1 for "true" sphericon) note: not all step counts allign both half correctly, it depends on how many sides the base polygon has. (I was too lazy to understand it, so just play around with it until it looks right.)
rotationSteps = 1;

/*==============================================================================*\
	Code begins after this point, don't judge, it's my first attempt at openSCAD,
	so yes it's some very ugly code, but it works. I will most likely rework it
	in the future to add some generation features or simply to make it less
	disgusting.

	Read at your own risks, might burn your eyes.
\*==============================================================================*/

/* [ Hidden ] */

//main logic
if (genSphericon == "yes")
{
	if (drawFull == "no")
	{
		difference()
		{
			rotate(a = [-90,0,-90]) drawHalfSphericon();

			if (genCylinder == "yes")
			{
				drawCylinderPin();
			}
			else
			{
				drawKeyPin();
			}
		}
	}
	else
	{
		union()
		{
			rotate(a = [-90, 0, 0]) drawHalfSphericon();
			rotate(a = [90, 0, getPolygonAngle(sidecount) * rotationSteps])drawHalfSphericon();
		}
	}
}
else
{
	if (genCylinder == "yes")
	{
		drawCylinderPin(clearance, depthDiff);
	}
	else
	{
		drawKeyPin(clearance, depthDiff);
	}
}

//Modified from suggested code on openSCAD's wiki to allow half polygons
module regularPolygon(order, r=1, half=false)
{
 	angles=[ for (i = [0:order-1]) i*(360/order) ];
 	coords=[ for (th=angles) [r*cos(th), r*sin(th)] ];

	if (half == true)
	{
		coords2=[ for (i = [0:getCoordCount(order) - 1]) coords[i]];
		coords3=concat([for (i=[0:len(coords2)-2]) coords[i]], [[coords2[len(coords2)-1][0], 0]]);

		polygon(coords3);
	}
	else
	{
		polygon(coords);
	}
 }

 //Gets how many vertices should be kept to draw half polygon
 function getCoordCount(count) = (floor(0.5*count) + (count%2) + 1);

 //Gets the angle between edges of the polygon
 function getPolygonAngle(sideCount) = (((sideCount - 2)*180)/sideCount);

 //Draws the half polygon using global variables and centers it
 module drawHalfSphericon()
 {
	translate([ 0, 0,diameter/2]) rotate_extrude(angle = 180, $fn = smoothness)
	{
		rotate(a=[0,0,90]) translate([-diameter/2, 0, 0]) regularPolygon(sidecount,
																		 diameter/2,
																		 true);
	}
 }

 //Draws the cylinder pin
 module drawCylinderPin(pClearance = 0, pDepthDiff = 0)
 {
	cylinder(h = diameter/3 - pDepthDiff,
			r = diameter/10 - pClearance,
			center = true,
			$fn = smoothness);
}

//Draws the key pin
module drawKeyPin(pClearance = 0, pDepthDiff = 0)
{
	linear_extrude(height = diameter/3 - pDepthDiff, center = true) regularPolygon(sidecount, diameter/5 - pClearance);
}
```


[User]
I'd like to create a series of nested, scaled, and angled bowl-like shapes based on a sphere.  The basic idea is that we'll have a sphere, then we cut off a portion of the sphere with a plane defined by an angle, leaving an opening. The interior of the bowl will also be a spherical cut, creating a shell. I'd also like to add a small ring feature at both the opening and the base, basically defining the edges of the bowls. Finally, I need to be able to scale the entire object, and the scaling should apply to all aspects of the design: the cuts, the sphere, and the rings.

Here are the key parameters:

*   **Sphere Diameter:** The base sphere will be 200mm in diameter.
*   **Wall Thickness:** The shell thickness should be 3mm, but it would be nice if this parameter was scaleable, with the wall thickness being 3/100 * scale, so if scale is 100 then it's 3mm, but if scale is 50 then its 1.5mm.
*   **Angle of Opening:** This angle will define the plane that cuts off the top of the sphere, and it should be controllable from 0 (a horizontal cut) to maybe 75 or 80 degrees. This should be specified in degrees, as that's what I'm used to.
*   **Scale:** This is a percentage applied to the entire object. So, at 100%, the object remains as designed, 50% would shrink it to half size in every dimension.
*   **Opening Ring:** There should be a ring at the top opening. This ring should extend a short distance on the z-axis above and below the cut. Its height should be 4mm, and its diameter should be 160mm.
*  **Opening Ring Wall Thickness:** The opening ring thickness should be scaleable, with the wall thickness being 5/100 * scale, so if scale is 100 then it's 5mm, but if scale is 50 then it's 2.5mm
*   **Base Ring:** There should be a ring at the bottom, a short distance below the sphere’s base. Its height should be 2mm and diameter should be 105mm.

I'd like to be able to easily adjust all of these parameters using Customizer. I'm not worried about printing orientation; I'll handle that myself, and the part will be printed with the open part of the bowl down toward the printer bed. Could you generate OpenSCAD code for this?

[Assistant]
kugel-schalen.scad:
```
$fn=360;

// angle of the opening, 0 is horizontal
ANGLE=30;  // [0:73]

// scale in per cent, e.g.100, 85.0, 72.2, 61.4, 52.2, 44.4, 37.7, 32.0
SCALE=100;

scale([SCALE/100,SCALE/100,SCALE/100]) m(ANGLE);

module m(w=30)
    {
    difference() {
        sphere(d=200);
        sphere(d=200 -3/SCALE*100);
        rotate([w,0,0]) translate([0,0,160]) cube([200,200,200],center=true);
        translate([0,0,-185]) cube([200,200,200],center=true);
        }

    rotate([w,0,0])
        difference() {
            translate([0,0,160-200/2]) cylinder(d=160, h=4,center=true);
            translate([0,0,160-200/2]) cylinder(d=160 -5/SCALE*100, h=5,center=true);
            }
    translate([0,0,-185+200/2]) cylinder(d=105, h=2,center=true);
    }
```


[User]
Hi, I'm looking to create a customizable pill case using OpenSCAD. I really like the design of a circular pill case with segmented compartments, and I have a few specific features in mind.

First, I'd like to be able to control the number of compartments, the overall outer diameter of the case, the inside height, and the wall thickness. These should be parameters I can easily adjust in the customizer. The case should have a lid that fits snugly, and I'd like it to also be parametric so it scales properly.

I also want a few advanced options:

*   **Build Plate Display:** I'd like to have an optional display of the build plate in the preview, to make sure it fits on my printer. I'd like to be able to choose from common printer models like the Replicator 2, Replicator, Thingomatic, or a custom size. This display should use the "build_plate.scad" library for the build plate visualization.
*   **View Selection:** I want to be able to select different views in the customizer: "Body" to only show the base of the pill case, "Lid" to only show the lid, "Print" to show both the body and the lid positioned as they would be for printing, and "Fit" to show the body and lid intersected for a visual check of the fit.
*   **Labeling:** I want to be able to label each compartment. I need three options: "None" for no labels, "Numbers" to label each compartment with a number (1, 2, 3, etc.), or "Text" to label them with custom text. If I choose "Text", I should also be able to specify a list of strings to use as the labels. The text labels should be placed on the top of the body at the compartment dividers. The size of both text and number labels should scale with the overall case size, and adjust to stay within the available space on the divider.
*   **Detents:** The case should have detents to help align the lid with the compartments when closing, I'd like these to be small, but pointed and a bit deeper for a solid "click".
*   **Center Compartment:** I would like an optional center compartment that's hidden and accessible from the top of the case. This compartment would be separate from the other segmented compartments. This should be togglable via a customizer variable.

For some additional design details:

*   The lid should have small splits at the compartment dividers to allow the detents to function, and to accommodate for any dimensional errors from printing. Make sure these cut through the detents.
*   The pill case body should have an internal floor.
*   I'd like the text labels to use the "Arial" font, if available.
*   I'd also like to see the calculated volume of a single compartment printed to the console as well as the file name and parameter values as an echo statement when it renders. This should be calculated in cm^3.

Could you please generate the OpenSCAD code to implement these features? I am particularly interested in having a very clear and well-commented code structure, as I would like to be able to easily understand and modify it later. Thanks!

[Assistant]
Pill_Case_2.scad:
```
// Pill_Case_2
//  Original by YK42
//  Mods by bratoff -
//    - Add build plate display
//    - Add view selection in customizer
//    - Add a bit more space between parts in Print view
//    - Add labeling options
//    - Adjust text width based on label type
//    - Enlarged detents and made them pointy
//    - Added optional hidden center compartment
//    - Corrected lid splits not cutting through notch
//    - Reduced lid clearance a little bit
//

use <utils/build_plate.scad>

View_Mode = "Print";  //["Body","Lid","Print","Fit"]
Show_Build_Plate = true;
Center_Compartment = true;
Labels = "Text";   //["None","Numbers","Text"]
Label_Text = ["Su","Mo","Tu","We","Th","Fr","Sa"];

// - Number of segments
N = 7;

// - Outer diameter of body
D = 70;

// - inside height of body
H = 18;

// - wall thickness
t = 1.2;

// - print quality
$fn=64;

/* [Hidden] */
c = 0.6;
R = D/2;
cps = 0.8;
NotchZ = max(H-10, H/2);
unitVol = (3.14159*pow(R-t,2) - (R-t)*t )*H /(1000*(N+1));
echo(unitVol, "cm^3");
echo(str("FileName: PillCase2 ",N," ",D," ",H," ",t));

if(Show_Build_Plate)
  %build_plate(4,105);

if(View_Mode == "Body")
  Body();
if(View_Mode == "Lid")
  translate([0,0,H+c+t]) rotate([0,180,0]) Lid();
if(View_Mode == "Print")
  PrintConfig();
if(View_Mode == "Fit")
  FitConfig();

module Body() {
    //body polygon starting at origin and going CCW
    pBody = [
        [0,         0],         //origin
        [R,       0],           //Bottom outer edge
        [R,       NotchZ-t/2],  //Bottom of notch
        [R-t/2,   NotchZ],      //Center of notch
        [R,       NotchZ+t/2],  //Top of notch
        [R,       H],           //Top outer edge
        [R-t,     H],           //Top inner edge
        [R-t,     t],           //Bottom inner edge
        [0,         t]];        //I/S Center
    difference() {
      union() {
        rotate_extrude() {
            polygon(pBody);
        }
        //walls
        for(a=[0:360/(N+1):360]) {
            rotate(a) translate([0, -t/2, 0]) {
                cube([R-t, t, H]);
            }
        }
        //filled segment. N-NE
        intersection() {
            linear_extrude(H)
            polygon([
                [0,0],
                [D,0],
                [D,D*10],
                [R*cos(360/(N+1)), R*sin(360/(N+1))]]);
            cylinder(d=D-t,H);
        }
        if(Center_Compartment) {
          translate([0,0,t]) cylinder(d=cps*R,H-t);
        }
      }
      if(Center_Compartment) {
        translate([0,0,t]) cylinder(d=cps*R-2*t,H);
      }
    }

    //locating notches
    rotate(0) translate([R-0.3*t,0,NotchZ]) scale([1,1,2]) {
        sphere(d=2*c, $fn=6);
    }
    rotate(360/(N+1)) translate([R-0.3*t,0,NotchZ]) scale([1,1,2]) {
        sphere(d=2*c, $fn=4);
    }

    if(Labels != "None") {
      //labels going CW
      textWd = (Labels == "Numbers") ? min(3.14159*D/(N+1)*0.8, D/10) : 3.14159*D/(N+1)*0.5;
      textHt = min(textWd*1.4, H/2-2);
      textTk = 0.7;
      for(n = [1:N]) {
          ang = -360/(N+1)*(n-0.5);
          rotate(ang)
          translate([R-textTk*1.5, 0, 0.5*NotchZ])
          rotate([90,0,90])
          linear_extrude(3*textTk)
          resize([textWd, textHt])
          if(Labels == "Numbers")
            text(str(n), halign="center",, valign="center", font="Arial");
          else
            text(Label_Text[n-1], halign="center",,valign="center",font="Arial");
      }
    }

}

module Lid() {
    //lid polygon starting inside center and going CCW
    pLid = [
        [0,       H+c],             //inside center
        [R+c,     H+c],             //top inside ring
        [R+c,     NotchZ+t/2+c],    //top of notch
        [R-t/2,   NotchZ],          //point of notch
        [R+t+c,     NotchZ],          //back of notch
        [R+t+c,     H+c+t],           //top outer edge
        [0,       H+c+t]];          //top center

    difference() {
        //body
        rotate_extrude() {
            polygon(pLid);
        }
        //splits
        splitLen = min(R/2, 15, 0);
        for(a=[0:360/(N+1):360]) {
            rotate(a) translate([R-splitLen-t, -c/2]) {
                cube([R,c,H*2]);
            }
        }
        //opening
        difference() {
            //triangular wedge
            linear_extrude(H*2)
            polygon([
                [0,0],
                [D,0],
                [D,D*10],
                [R*2*cos(360/(N+1)), R*2*sin(360/(N+1))]]);
            //central cylinder
            cylinder(d=R,H*2);
        }
    }
}

module PrintConfig() {
    Body();
    rotate([180,0,0]) translate([D+t*4, 0, -H-t-c]) {
        Lid();
    }
}

module FitConfig() {
    intersection() {
        union() {
            Body();
            Lid();
        }
        rotate(-45/2) cube(D);
    }
}
```
build_plate.scad:
```
//use this to include a build plate visualization in your openSCAD scripts. Very useful for things designed to be edited in Makerbot Customizer

//to use, either include or use <utils/build_plate.scad>

//then just call build_plate(); with the following arguments (also, you have to have a real object in your scene for this to render)

//putting 0 as the first argument will give you a Replicator 2 build plate
//putting 1 as the first argument will give you a Replicator 1 build plate
//putting 2 as the first argument will give you a Thingomatic build plate
//putting 3 as the first argument will give you a manually adjustable build plate (note: if you use this option, you need to specify your build plates X length (in mm) as the second argument and the Y length (in mm) as the third argument. eg. build_plate(3,150,120);)
//putting 4 as the first argument will give you a circular build plate of diameter second argument

/*

to give your user control of which build plate they see in Customizer, include the following code:

use <utils/build_plate.scad>

//for display only, doesn't contribute to final object
build_plate_selector = 0; //[0:Replicator 2,1: Replicator,2:Thingomatic,3:Manual]
//when Build Plate Selector is set to "manual" this controls the build plate x dimension
build_plate_manual_x = 100; //[100:400]
//when Build Plate Selector is set to "manual" this controls the build plate y dimension
build_plate_manual_y = 100; //[100:400]

build_plate(build_plate_selector,build_plate_manual_x,build_plate_manual_y);

*/

//to see how this works, uncomment the following code

//build_plate_selector = 4; //[0:Replicator 2,1: Replicator,2:Thingomatic,3:Manual,4:Circular]
//build_plate_manual_x = 110; //[100:400]
//build_plate_manual_y = 100; //[100:400]
//
//build_plate(build_plate_selector,build_plate_manual_x,build_plate_manual_y);
//
//cube(5);

module grid_mask(manX) {
  difference() {
    translate([0,0,-0.01]) cube([manX+1,manX+1,1.04],center=true);
    translate([0,0,-0.02]) cylinder(d=manX-0.01,h=1.05,center=true);
  }
}

module make_grid(manX,manY) {
  for(i = [-(floor(manX/20)):floor(manX/20)]){
    translate([i*10,0,0])
      %cube([.5,manY,1.01],center = true);
  }
  for(i = [-(floor(manY/20)):floor(manY/20)]){
    translate([0,i*10,0])
      %cube([manX,.5,1.01],center = true);
  }
}

module build_plate(bp,manX,manY){

		translate([0,0,-.52]){
			if(bp == 0){
				%cube([285,153,1],center = true);
			}
			if(bp == 1){
				%cube([225,145,1],center = true);
			}
			if(bp == 2){
				%cube([120,120,1],center = true);
			}
			if(bp == 3){
				%cube([manX,manY,1],center = true);
			}
      if(bp == 4) {
        %cylinder(d=manX,h=1,center = true);
      }

		}
		translate([0,0,-.5]){
			if(bp == 0){
				for(i = [-14:14]){
					translate([i*10,0,0])
					%cube([.5,153,1.01],center = true);
				}
				for(i = [-7:7]){
					translate([0,i*10,0])
					%cube([285,.5,1.01],center = true);
				}
			}
			if(bp == 1){
				for(i = [-11:11]){
					translate([i*10,0,0])
						%cube([.5,145,1.01],center = true);
				}
				for(i = [-7:7]){
					translate([0,i*10,0])
						%cube([225,.5,1.01],center = true);
				}
			}
			if(bp == 2){
				for(i = [-6:6]){
					translate([i*10,0,0])
						%cube([.5,120,1.01],center = true);
				}
				for(i = [-6:6]){
					translate([0,i*10,0])
						%cube([120,.5,1.01],center = true);
				}
			}
			if(bp == 3){
        make_grid(manX,manY);
			}
      if(bp == 4) {
        difference() {
          make_grid(manX,manX);
          grid_mask(manX);
        }
      }
		}
}
```


[User]
I'd like to create a customizable LEGO brick with text on all four sides. I want to be able to specify the length, width, and height of the brick in studs and LEGO height units, respectively. Also I need to be able to control if there are studs on top and under-studs underneath for skinny bricks (those with length or width of 1).

For the text, I need to specify the text for each of the four sides (front, back, left, right), as well as the scale of the text, and whether it's raised or recessed. It should be possible to have some sides with raised text, and some recessed.

I'd also like a tolerance parameter to account for 3D printing inaccuracies. I need to be able to choose from a list of common fonts that look good, or specify any font from the Google Fonts repository, and control the text size, the spacing between the letters, and the depth of the engraved/raised text. A text z-shift parameter is also required to move the text up or down. The number of fragments for circles should also be controllable.

Finally, I need to be able to override the default LEGO dimensions like the unit length, plate height, roof thickness, wall thickness, stud diameter and height, undertube diameters, understud diameter, and the play between bricks.

Can you create an OpenSCAD file that allows me to specify all of these parameters?

[Assistant]
LEGOTextBrick-v2p1.scad:
```
/* LEGO Text Bricks
   by Lyl3

Create LEGO compatible bricks with text engraved on the sides

This code is published at:
https://www.thingiverse.com/thing:3867358
and
https://www.printables.com/model/253433
and is licensed under the Creative Commons - Attribution - Share Alike license (CC BY-SA 4.0)

V0.1 - working code
V0.2 - corrected brick dimensions to have 0.1 mm play on each side
       corrected stud height to be 1.8 mm instead of 1.6 mm
       corrected roof thickness to be 1.0 mm instead of 1.6 mm
V0.3 - cleaned the code
V0.4 - adjusted wall thickness from 1.6 mm to 1.4 mm
       fixed math for stud positions
       fixed math for play so that it's split between sides instead of on just one side
V0.5 - added tolerance parameter
V0.6 - corrected position of text to account for play and tolerance
V0.7 - set sane ranges for all parameters
V1.0 - adjusted diameter of under-stud from 6.51 to 6.41
       adjusted width of walls from 1.4 mm to 1.5 mm
       ready for release
V1.1 - changed boolean parameters to yes/no parameters to make them Thingiverse Customizer-friendly
V1.2 - allowed $fn to be adjusted from previous hard-coded value of 100
V1.3 - allow text Z shift to be negative
V1.4 - added parameter for spacing between letters
V1.5 - moved studs down 0.00001 mm so that the brick and studs are a single mesh
V1.6 - bug fix: parameter for spacing between letters now applied to text on back,left and right sides
     - allowed LEGO dimensions to be overridden
V1.7 - modified font selection method to work around bug that Thingiverse customizer recently introduced
         that prevents direct selection of fonts with a style specified
       added capability to select any font
V1.8 - added capability to have raised text instead of embossed text
V1.9 - added capability to specify raised or recessed text for each side
V2.0 - fixed the incorrect height of the understuds which were too short to reach the top of the brick
V2.1 - simply changed the default value for the tolerance parameter from 0.05 to 0.0
*/

/*
   Set default brick to be #2456 6x2
*/
/* [Brick Parameters] */

// Brick length (specified in number of studs).
brickLength = 6; // [1:1:48]

// Brick width (specified in number of studs).
brickWidth = 2;  // [1:1:48]

// Brick height (specified in LEGO height units: 3 is normal brick height, 1 is plate height).
brickHeight = 3; // [1:1:18]

// Studs on top of the brick?
withStuds = "yes"; // [yes,no]
createStuds = (withStuds=="yes") ? true : false;

// Under-studs on underneath of skinny bricks? Skinny bricks that are only one unit wide have smaller solid cylinders (under-studs) underneath instead of the usual hollow cylinders. These have a tiny footprint and may not stick to the build-plate, so you may want to avoid printing them.
withUnderStuds = "no"; // [yes,no]
createUnderStuds = (withUnderStuds=="yes") ? true : false;

/* [Text Parameters] */

frontText = "Text Bricks";
frontTextScale = 1.0; // [0:0.01:1]
frontTextType = "raised"; // [raised,recessed]

backText = "";
backTextScale = 1.0; // [0:0.01:1]
backTextType = "recessed"; // [raised,recessed]

leftText = "";
leftTextScale = 1.0; // [0:0.01:1]
leftTextType = "recessed"; // [raised,recessed]

rightText = "";
rightTextScale = 1.0; // [0:0.01:1]
rightTextType = "recessed"; // [raised,recessed]

/* [Advanced parameters] */

// Tolerance to account for 3D printing inaccuracies (mm). This decreases the sizes of all vertical surfaces (brick walls, studs, under-tubes, and under-studs) to provide a better fit. It is equivalent to a negative horizontal expansion setting in the Cura slicer. If you printed some bricks and they were too tight, increase this a small amount and try again.
tolerance = 0.00; // [0:0.01:0.1]

// Some suitable fonts
//fontName = "Arial Black:style=Regular";    // Not available on Thingiverse customizer
//fontName = "Biryani:style=Black";          // Has short numbers
//fontName = "Heebo:style=Black";            // Has tight kerning
//fontName = "Maven Pro:style=Black";        // Has tight spacing on "g"
//fontName = "Nunito Sans:style=Black";      // Has tight kerning
//fontName = "Orbitron:style=Black";         // Has blocky letters
//fontName = "Palanquin Dark:style=Bold";    // Has descended numbers
//fontName = "Raleway:style=Black";          // Has descended numbers
//fontName = "Roboto:style=Black";           // No issues
//fontName = "Yantramanav:style=Black";      // No issues

// Choose from a small selection of similar fonts that should work well in this application (NOTE: Arial is not available on Thingiverse).
fontName = 9; // [2:Biryani Black, 3:Heebo Black, 4:Maven Pro Black, 5:Nunito Sans Black, 6:Orbitron Black, 7:Palanquin Dark Bold, 8:Raleway Black, 9:Roboto Black, 10:Yantramanav Black, 0:other, 1:Arial Black]

// If "other" is selected above, you can specify any font available from the Google fonts repository . See https://fonts.google.com/ for available fonts. For example, specify "Overpass Mono:style=Bold" to allow entering some special symbols like heart, club, etc.
otherFont = "Overpass Mono";

// The base size of the text on all sides (can be scaled down in the text parameters section).
textSize = 5.5; // [1:0.1:10]

// Spacing between letters. (ratio: 1 is normal spacing of the font) It's better to have this a little higher for this application.
letterSpacing = 1.05;  // [0.9:0.01:2.0]

// How much to shift the text in the Z dimension (mm).
textZShift = 2.0;         // [-5:0.1:8]

// The depth of the text (mm). You should probably decrease this from the default of 0.8 if you plan on scaling the model up in your slicer.
textDepth = 0.8;  // [0.2:0.01:1.0]

// Resolution of circles. 50 fragments is more than enough for such a small cylinders unless the model will be later scaled up
numberFragments = 50;                 // [6:1:100]
$fn = numberFragments;

/* [Advanced parameters: Override LEGO dimensions] */

// X and Y dimension of one brick unit (mm)
UNIT_LENGTH = 8; // [0.8:0.01:80]

// plate height (a standard brick is 3 times this height) (mm)
PLATE_HEIGHT = 3.2; // [0.32:0.01:32]

// thickness of brick roof (mm)
ROOF_THICKNESS = 1; // [0.1:0.01:10]

// thickness of brick outer wall as in the original 1.5 mm wall without nubs (mm)
WALL_THICKNESS = 1.5; // [0.15:0.01:15]

// diameter of the studs (solid cylinders) on top of a brick (mm)
STUD_DIAMETER = 4.8; // [0.48:0.01:48]

// height of the studs (solid cylinders) on top of a brick (mm)
STUD_HEIGHT = 1.8; // [0.18:0.01:18]

// outer diameter of the under-tubes (hollow cylinders) on the underside of bricks with length > 1 and width > 1 (mm)
UNDERTUBE_OUTER_DIAMETER = 6.41; // [0.64:0.01:64.1]

// inner diameter of the under-tubes (hollow cylinders) on the underside of bricks with length > 1 and width > 1 (mm)
UNDERTUBE_INNER_DIAMETER = 4.8; // [0.48:0.01:48]

// diameter of the under-studs (solid cylinders) on the underside of bricks with length = 1 or width = 1 (mm)
UNDERSTUD_DIAMETER = 1.6; // [0.16:0.01:16]

// the necessary play between bricks so that they fit together
PLAY = 0.2; // [0.02:0.01:2]

/* [Hidden] */
fudge = 0.01;               // Amount to expand some dimensions to ensure manifold model

// This convoluted way of selecting the font from an array was a requirement introduced by a change
// on the Thingiverse customizer that broke the ability to directly select fonts with a style specified.
// This issue was first noticed 2010-02-26 and probably happened within the two months prior to that date.
fontNames = ["other", "Arial Black:style=Regular", "Biryani:style=Black", "Heebo:style=Black", "Maven Pro:style=Black", "Nunito Sans:style=Black", "Orbitron:style=Black", "Palanquin Dark:style=Bold", "Raleway:style=Black", "Roboto:style=Black", "Yantramanav:style=Black"];

selectedFont = (fontName==0) ? otherFont : fontNames[fontName];

frontTextBack = (frontTextType == "raised") ? 0 : textDepth;
backTextBack = (backTextType == "raised") ? 0 : textDepth;
leftTextBack = (leftTextType == "raised") ? 0 : textDepth;
rightTextBack = (rightTextType == "raised") ? 0 : textDepth;

difference() {
  union() {
    translate([-brickLength/2*UNIT_LENGTH, -brickWidth/2*UNIT_LENGTH, 0])
      brick (brickLength, brickWidth, brickHeight);
    if (frontTextType == "raised") makeFrontText() ;
    if (backTextType == "raised") makeBackText() ;
    if (leftTextType == "raised") makeLeftText() ;
    if (rightTextType == "raised") makeRightText() ;
  }
  if (frontTextType == "recessed") makeFrontText() ;
  if (backTextType == "recessed") makeBackText() ;
  if (leftTextType == "recessed") makeLeftText() ;
  if (rightTextType == "recessed") makeRightText() ;
}

/*
   Module to make a simple rectangular LEGO compatible brick
   Makes a #3001 4x2 brick by default
*/
module brick(length=4, width=2, height=3) {

  // The brick
  translate([PLAY/2+tolerance, PLAY/2+tolerance, 0])
    difference() {
      cube([length*UNIT_LENGTH-PLAY-2*tolerance, width*UNIT_LENGTH-PLAY-2*tolerance, height*PLATE_HEIGHT]);
      translate([WALL_THICKNESS-2*tolerance, WALL_THICKNESS-2*tolerance, -ROOF_THICKNESS])
        cube([length*UNIT_LENGTH-2*WALL_THICKNESS-PLAY+2*tolerance, width*UNIT_LENGTH-2*WALL_THICKNESS-PLAY+2*tolerance, height*PLATE_HEIGHT]);
    }

  // The studs
  if(createStuds) {
    translate([0,0, height*PLATE_HEIGHT-0.00001])
      for (y = [0:width-1]) {
        for (x = [0:length-1]) {
          translate([(x+0.5)*UNIT_LENGTH, (y+0.5)*UNIT_LENGTH, 0])
            cylinder(h=STUD_HEIGHT, d=STUD_DIAMETER-2*tolerance);
        }
      }
  }

  // The under-tubes (hollow cylinders)
  if (width > 1 && length > 1) {
    for (y = [1:width-1]) {
      for (x = [1:length-1]) {
        difference() {
		  translate([x*UNIT_LENGTH, y*UNIT_LENGTH, 0])
			cylinder(h=height*PLATE_HEIGHT-ROOF_THICKNESS+fudge, d = UNDERTUBE_OUTER_DIAMETER-2*tolerance);
		  translate([x*UNIT_LENGTH, y*UNIT_LENGTH, -fudge])
			cylinder(h=height*PLATE_HEIGHT-ROOF_THICKNESS+fudge, d = UNDERTUBE_INNER_DIAMETER+2*tolerance);
		}
	  }
	}
  }

  // The under-studs (smaller solid cylinders) along the length
  if (width == 1 && length > 1 && createUnderStuds) {
	for (x = [1:length-1]) {
	  translate([x*UNIT_LENGTH, 0.5*UNIT_LENGTH, 0])
	    cylinder(h=height*PLATE_HEIGHT-ROOF_THICKNESS+fudge, d=UNDERSTUD_DIAMETER-2*tolerance);
	}
  }

  // The under-studs (smaller solid cylinders) along the width
  if (length == 1 && width > 1 && createUnderStuds) {
	for (y = [1:width-1]) {
	  translate([0.5*UNIT_LENGTH, y*UNIT_LENGTH, 0])
		cylinder(h=height*PLATE_HEIGHT-ROOF_THICKNESS+fudge, d=UNDERSTUD_DIAMETER-2*tolerance);
	}
  }

}

module makeFrontText () {
  translate([0, -brickWidth/2*UNIT_LENGTH+frontTextBack+PLAY/2+tolerance, textZShift]) rotate([90, 0, 0])
    linear_extrude(textDepth+fudge) text(frontText, font=selectedFont, size=textSize*frontTextScale, halign="center", spacing=letterSpacing);
}
module makeBackText () {
  translate([0, brickWidth/2*UNIT_LENGTH-backTextBack-PLAY/2-tolerance, textZShift]) rotate([90, 0, 180])
    linear_extrude(textDepth+fudge) text(backText, font=selectedFont, size=textSize*backTextScale, halign="center", spacing=letterSpacing);
}
module makeLeftText () {
  translate([-brickLength/2*UNIT_LENGTH+leftTextBack+PLAY/2+tolerance, 0, textZShift]) rotate([90, 0, 270])
    linear_extrude(textDepth+fudge) text(leftText, font=selectedFont, size=textSize*leftTextScale, halign="center", spacing=letterSpacing);
}
module makeRightText () {
  translate([brickLength/2*UNIT_LENGTH-rightTextBack-PLAY/2-tolerance, 0, textZShift]) rotate([90, 0, 90])
    linear_extrude(textDepth+fudge) text(rightText, font=selectedFont, size=textSize*rightTextScale, halign="center", spacing=letterSpacing);
}

```


[User]
I need to create a customizable mount for attaching a tube to a flat surface. I've seen a design that looks pretty close to what I need, but I'd like it to be fully parametric so I can adjust it easily.

The mount should basically have a flat base with a curved section that cradles the tube. I need to be able to specify the following:

*   **Tube Diameter:** The outer diameter of the tube that the mount will hold.
*   **Base Thickness:** The thickness of the flat base of the mount.
*   **Base Length:** The length of the flat base, running along the axis of the tube.
*   **Screw Hole Diameter:** The diameter of the screw hole for mounting the base to a surface (if I don't need a hole, I'd like to set this to 0).
*   **Top Countersink Depth:** The depth of a countersink on the top of the screw hole (where the screw head will be). Should be able to set this to 0 to have no countersink.
*  **Bottom Countersink Depth:** The depth of a countersink on the bottom of the screw hole. Should be able to set this to 0 to have no countersink.
*   **Base Corner Radius:** The radius of the curves at the corners of the flat base.
*  **Top Corner Radius:** The radius of the curves where the base transitions to the tube cradle.

I'd also like to be able to control the $fa and $fs variables for the OpenSCAD file for controlling the polygon resolution. I'm looking for an OpenSCAD file or files that will do this, including all the modules needed. I don't need anything to interface with existing libraries.

[Assistant]
Tube_Saddle_Mount_Customizer.scad:
```
// Copyright 2019 Geoff Sobering - All Rights Reserved
//
// This design is licensed under the Creative Commons
//   Attribution-NonCommercial-ShareAlike 3.0 Unported License
//  (CC BY-NC-SA 3.0)
//  https://creativecommons.org/licenses/by-nc-sa/3.0/
//  https://creativecommons.org/licenses/by-nc-sa/3.0/legalcode
//
// For commerical use, please contact us (geoff@geoffs.net).

// The outside diameter of the tube
Tube_Diameter = 26.7;
// The thickness of the base under the tube
Base_Thickness = 6;
// The length of the base in the direction of the tube
Base_Length = 60;
// The diameter of the screw hole (0=no hole)
Screw_Hole_Dia = 5;
// The depth of the countersink under the tube (0=no countersink)
Top_Countersink_Depth = 0;
// The depth of the countersink in the bottom of the mount (0=no countersink)
Bottom_Countersink_Depth = 2;
// The radius for the base at the surface
Base_Corner_Radius = 6;
// The radius of the base where is comes to the tube
Top_Corner_Radius = 6;
// The minimum angle for a fragment(degrees) - OpenSCAD $fa variable
FA = 5;
// The minimum size of a fragment (mm) - OpenSCAD $fs variable
FS = 0.5;

adapter(
  Tube_Diameter,
  Base_Thickness,
  Base_Length,
  Screw_Hole_Dia,
  Top_Countersink_Depth,
  Bottom_Countersink_Depth,
  Base_Corner_Radius,
  Top_Corner_Radius,
  FA, FS);

/* difference()
{
  adapter(tubeOD, baseThickness, baseLength, screwDia, topCountersinkDepth, bottomCountersinkDepth);
  translate([-100, -200, -100]) cube(200);
} */

module adapter(tubeOD, baseZ, baseY, screwHoleDia, topCountersinkDepth, bottomCountersinkDepth, baseCornerRadius, topCornerRadius, FA, FS)
{
  $fa = FA;
  $fs = FS;
  baseX = tubeOD * 1.3 + 2*baseCornerRadius; // + 20;

  topX = tubeOD + 2*topCornerRadius;
  topY = baseY;

  pvcTubeCenterlineZ = tubeOD/2+baseZ;

  baseCentering = [-baseX/2, -baseY/2,0]; //[-baseX/2+baseCornerRadius, -baseY/2+baseCornerRadius, 0];

  baseP1 = [baseCornerRadius, baseCornerRadius, 0] + baseCentering;
  baseP2 = [baseCornerRadius, baseY-baseCornerRadius, 0] + baseCentering;
  baseP3 = [baseX-baseCornerRadius, baseCornerRadius, 0] + baseCentering;
  baseP4 = [baseX-baseCornerRadius, baseY-baseCornerRadius, 0] + baseCentering;
  echo(str("baseP1 = ", baseP1));
  echo(str("baseP4 = ", baseP4));

  topCentering = [-topX/2, -topY/2, 0]; //[-topX/2+topCornerRadius, -topY/2+topCornerRadius, 0];
  tz = pvcTubeCenterlineZ-topCornerRadius;
  topP1 = [topCornerRadius, topCornerRadius, tz] + topCentering;
  topP2 = [topCornerRadius, topY-topCornerRadius, tz] + topCentering;
  topP3 = [topX-topCornerRadius, topCornerRadius, tz] + topCentering;
  topP4 = [topX-topCornerRadius, topY-topCornerRadius, tz] + topCentering;
  echo(str("topP1 = ", topP1));
  echo(str("topP4 = ", topP4));

  difference()
  {
    union()
    {
      hull()
      {
        translate(baseP1) sphere(r=baseCornerRadius);
        translate(baseP2) sphere(r=baseCornerRadius);
        translate(baseP3) sphere(r=baseCornerRadius);
        translate(baseP4) sphere(r=baseCornerRadius);

        translate(topP1) sphere(r=topCornerRadius);
        translate(topP2) sphere(r=topCornerRadius);
        translate(topP3) sphere(r=topCornerRadius);
        translate(topP4) sphere(r=topCornerRadius);
      }
    }

    // Put in the screw-hole if needed:
    if(screwHoleDia > 0)
    {
      translate([0,0,-1]) cylinder(d=screwHoleDia, h=100);
      if(topCountersinkDepth > 0)
      {
        d1 = 2*topCountersinkDepth+screwHoleDia+3;
        hb= d1/2;
        dz = baseZ - screwHoleDia/2 - topCountersinkDepth; //  + bottomCountersinkDia/2 - 0.5; //-screwHoleDia/2; //-screwHoleDia/2+baseZ/2;
        translate([0,0,dz]) cylinder(d1=0, d2=d1, h=hb);
      }
      if(bottomCountersinkDepth > 0)
      {
        d1 = 100;
        hb= d1/2;
        dz = -hb + screwHoleDia/2 + bottomCountersinkDepth; //  + bottomCountersinkDia/2 - 0.5; //-screwHoleDia/2; //-screwHoleDia/2+baseZ/2;
        translate([0,0,dz]) cylinder(d1=d1, d2=0, h=hb);
      }
    }

    // Cut out the tube:
    translate([0, 100, pvcTubeCenterlineZ]) rotate(90,[1,0,0]) cylinder(d=tubeOD, h=200);

    // Cut off anything below Z=0:
    translate([-100, -100, -200]) cube(200);
  }
}

```


[User]
I need an OpenSCAD design for a customizable faceplate for a T-LOC Systainer latch or knob. It should have several parameters that can be adjusted:

*   **`faceplateLabel1`**:  A string for the first line of text on the faceplate.
*   **`label1Scale`**: A number for scaling the first line of text (with reasonable min/max values).
*   **`label1Shift`**: A number for shifting the first line of text vertically (with reasonable min/max values).
*   **`faceplateLabel2`**: A string for the second line of text (can be an empty string).
*  **`label2Scale`**: A number for scaling the second line of text (with reasonable min/max values).
*   **`label2Shift`**: A number for shifting the second line of text vertically (with reasonable min/max values).
*   **`addArrow`**: A yes/no choice to add a rotation arrow to the faceplate.
*   **`createFaceplate`**: A yes/no choice to create the faceplate or just the text (for dual extrusion printing).
*   **`swapTower`**: A yes/no choice to include a small cylinder swap tower to prime the nozzle (for single extruder dual color printing).

The base faceplate should be designed to fit a standard T-LOC systainer latch/knob, with tabs for a pressure fit.  The faceplate is 1.5 mm tall, and the text is 1.0 mm tall. If no faceplate is created, the text should still be placed appropriately. The arrow, if included, should be engraved into the faceplate. I'd also like the text to be centered horizontally and baseline-aligned vertically relative to its assigned Y position. Finally, ensure that all paths are properly combined to produce a single, manifold mesh (or text only if faceplate is disabled) and make minor adjustments to location and dimension using a fudge variable if necessary to ensure the model is manifold. Please also use `$fn=80` for arc resolution.

[Assistant]
SystainerLatchFaceplateText-V1p5.scad:
```
/* T-LOC Systainer Latch Faceplate with Text
   by Lyl3

Create a T-LOC Systainer latch/knob faceplate with customizable text

This code is published at:
https://www.thingiverse.com/thing:3870473
licensed under the Creative Commons - Attribution - Share Alike license (CC BY-SA 3.0)

V1.0 - working code
       ready for release
V1.1 - fixed bug that had separate meshes for the faceplate and each of the 4 tabs
V1.2 - reduced text height from 1.5 mm to 1.0 mm
v1.3 - changed boolean (true/false) parameter for swap tower into yes/no selection to make it Thingiverse Customizer-friendly
V1.4 - added option to add arrow indicating rotation motion
V1.5 - added option to create text label only for dual extrusion prints

*/
/* [Parameters] */

// The text that is added to the faceplate
faceplateLabel1 = "Tools";

// Ratio to scale text
label1Scale = 1;    // [0.25:0.01:2]

// Amount to shift the text in the Y dimension (mm)
label1Shift = 0;    // [-15:0.01:15]

// The second line of text that is added to the faceplate
faceplateLabel2 = "";

// Ratio to scale label 2
label2Scale = 1;    // [0.25:0.01:2]

// Amount to shift label 2 in the Y dimension (mm)
label2Shift = 0;    // [-15:0.01:15]

// Add an engraved arrow on the faceplate indicating rotation motion?
addArrow = "yes"; // [yes,no]

// Create the faceplate? (an answer of "no" will create the text only for dual extruders)
createFaceplate = "yes"; // [yes,no]

// Create a filament swap tower to prime the nozzle?
swapTower = "yes"; // [yes,no]

/* [Hidden] */
$fn = 80;         // Resolution of arcs
fudge = 0.001;   // Amount to adjust some dimensions or locations to ensure manifold model

//import("T-Loc_Blank-centered.stl");  // Original faceplate 80.2824 x 45.3749

//scale ([1.000291556, 1.001107564, 1]) // Scale to resize to exact size of original
// Model from STL->SVG path->SCAD polygon is 80.259 x 45.3247
if (createFaceplate=="yes") union() {
  difference() {
    no_tabs(1.5);
    if (addArrow=="yes") translate([0, -16.5, 1.1+fudge]) rotate([0,0,180]) arrow(0.4);
  }
  scale([0.9985,0.9985,1]) difference() {    // needs to be scaled back down so that the final part is a single mesh
    with_tabs(0.82);
    scale([1.0015,1.0015,1]) no_tabs(0.82);  // needs to be scaled up to remove tiny differences in the paths generated by Inkscape
  }
}

translate([0,-4+label1Shift,1.5-fudge]) linear_extrude (1.0) text(faceplateLabel1, size=label1Scale*15, halign="center", valign="baseline");
translate([0,-15+label2Shift,1.5-fudge]) linear_extrude (1.0) text(faceplateLabel2, size=label2Scale*15, halign="center", valign="baseline");

if (swapTower=="yes") translate([46.8,17.9,0]) cylinder(h=2, d=10);

module no_tabs(h)
{
  translate([0,-0.185,0]) union()
  {
    linear_extrude(height=h)
      polygon([[-0.844921,22.496630],[-10.839923,22.418730],[-21.164919,22.338430],[-27.029919,22.238050],[-32.274919,22.143550],[-33.739919,22.082850],[-36.264919,21.943090],[-37.324919,21.863990],[-37.704919,21.760570],[-38.084919,21.657150],[-38.434919,21.419990],[-38.784919,21.182840],[-38.923209,20.995480],[-39.176099,20.651310],[-39.290689,20.494500],[-39.409629,20.111310],[-39.528559,19.728120],[-39.744579,17.993120],[-39.960599,16.258120],[-40.025099,15.378120],[-40.114799,13.703120],[-40.129499,12.173120],[-40.068699,10.558120],[-40.018399,9.678120],[-39.844399,8.193120],[-39.670389,6.708120],[-39.470069,5.648120],[-39.118729,3.948120],[-38.414229,1.353120],[-37.860739,-0.601880],[-37.386159,-2.066880],[-36.911569,-3.531880],[-36.718269,-3.892800],[-36.524979,-4.253720],[-36.228229,-4.530830],[-35.931479,-4.807930],[-25.933229,-11.460540],[-15.934979,-18.113150],[-14.674979,-18.793230],[-13.414979,-19.473310],[-12.479983,-19.889500],[-11.544983,-20.305690],[-10.685019,-20.616400],[-8.855297,-21.222590],[-7.885538,-21.518070],[-7.085261,-21.711410],[-5.584983,-22.035240],[-4.211951,-22.251940],[-3.066951,-22.377690],[-1.304981,-22.456990],[-0.014981,-22.496690],[1.215019,-22.461390],[3.000019,-22.381590],[4.248549,-22.247100],[4.942079,-22.157100],[5.878549,-21.971360],[6.815019,-21.785610],[7.620019,-21.577040],[8.425019,-21.368470],[9.562289,-20.997220],[10.699559,-20.625980],[11.517289,-20.302190],[12.335019,-19.978410],[13.025019,-19.650970],[14.830019,-18.715570],[15.945019,-18.107620],[25.937709,-11.458450],[35.930399,-4.809270],[36.227709,-4.531520],[36.525019,-4.253770],[36.718309,-3.892760],[36.911599,-3.531750],[37.386189,-2.066750],[37.860779,-0.601750],[38.414259,1.353250],[39.118749,3.948250],[39.470059,5.648250],[39.670359,6.708250],[39.844379,8.193250],[40.018399,9.678250],[40.068699,10.558250],[40.129499,12.173250],[40.114699,13.703250],[40.024999,15.378250],[39.960599,16.258250],[39.744599,17.993250],[39.528609,19.728250],[39.409579,20.111780],[39.290539,20.495300],[39.172089,20.656780],[38.920339,20.999980],[38.787039,21.181710],[38.436009,21.419680],[38.084979,21.657650],[37.704979,21.761220],[37.324979,21.864790],[36.334979,21.938690],[35.154979,22.023190],[32.394979,22.138590],[21.194979,22.338020],[0.359979,22.496410],[-0.845021,22.496690]]);
  }
}

module with_tabs(h)
{
  union()
  {
    linear_extrude(height=h)
      polygon([[-23.920142,22.576505],[-25.430142,22.477805],[-26.010142,22.332195],[-26.626949,22.176945],[-26.684449,22.135045],[-26.718619,22.085445],[-29.171121,22.013145],[-32.045140,21.947645],[-35.185140,21.822975],[-36.289628,21.742575],[-37.309116,21.667775],[-37.684628,21.567595],[-38.080140,21.458955],[-38.796751,20.971325],[-39.054141,20.625045],[-39.295000,20.297275],[-39.414957,19.910045],[-39.534914,19.522815],[-39.750229,17.792815],[-39.965544,16.062815],[-40.030264,15.177815],[-40.120044,13.507815],[-40.134664,11.977815],[-40.074264,10.362815],[-39.929473,8.567815],[-39.834643,7.642815],[-39.669306,6.577815],[-39.503969,5.512815],[-39.238910,4.312815],[-38.973851,3.112815],[-38.420318,1.157815],[-37.866784,-0.797185],[-37.392247,-2.262185],[-36.917710,-3.727185],[-36.723924,-4.089695],[-36.530138,-4.452215],[-36.240138,-4.723495],[-35.950138,-4.994775],[-33.585138,-6.569185],[-30.412917,-8.680385],[-29.605696,-9.217185],[-29.605186,-9.277185],[-29.532406,-9.447815],[-29.105135,-9.906275],[-28.750135,-10.254105],[-28.166881,-10.715645],[-26.761881,-11.746185],[-25.230135,-12.751505],[-24.044375,-13.444995],[-23.109234,-13.895675],[-22.527116,-14.111825],[-22.336933,-14.116825],[-22.269483,-14.099325],[-19.469807,-15.962365],[-16.305133,-18.067465],[-15.940133,-18.309525],[-14.830133,-18.914065],[-13.030133,-19.846185],[-11.738529,-20.417765],[-10.255521,-20.967265],[-9.374116,-21.272755],[-8.096411,-21.627165],[-6.818706,-21.981585],[-6.099419,-22.131165],[-4.690135,-22.381205],[-4.000135,-22.481655],[-2.958606,-22.562055],[-0.610135,-22.677015],[0.949865,-22.668015],[1.889865,-22.643615],[2.939864,-22.562515],[3.989864,-22.481415],[4.918674,-22.336175],[6.343674,-22.082235],[7.614864,-21.772895],[9.094864,-21.350995],[9.799864,-21.129715],[11.064864,-20.651715],[12.329864,-20.173715],[13.434865,-19.626475],[15.234865,-18.694535],[15.929864,-18.309845],[18.584864,-16.543805],[21.753214,-14.436265],[22.266565,-14.094775],[22.328265,-14.114475],[22.389965,-14.134175],[22.974114,-13.917905],[23.558265,-13.701635],[24.899374,-12.906175],[26.240484,-12.110725],[27.485224,-11.186885],[28.729964,-10.263045],[29.162315,-9.800225],[29.594655,-9.337405],[29.594915,-9.277405],[29.595175,-9.217405],[32.762574,-7.110015],[35.929965,-5.002625],[36.224964,-4.727255],[36.519964,-4.451875],[36.713754,-4.089645],[36.907545,-3.727405],[37.382045,-2.262405],[38.196474,0.352595],[38.536415,1.502595],[38.899824,2.942595],[39.378474,4.947595],[39.659084,6.577595],[39.824474,7.642595],[39.919274,8.567595],[40.064064,10.362595],[40.124364,11.977595],[40.134664,12.722595],[40.085264,13.907595],[40.035865,15.092595],[39.950164,16.002595],[39.694524,18.217595],[39.524564,19.522595],[39.404674,19.909825],[39.284774,20.297055],[39.043925,20.624825],[38.786495,20.971215],[38.087755,21.450665],[37.687295,21.562825],[37.299914,21.666915],[36.279914,21.742615],[33.864914,21.877075],[29.559914,22.002615],[26.919815,22.063215],[26.719715,22.069215],[26.684815,22.118215],[26.614915,22.176515],[25.999915,22.331165],[25.419915,22.476455],[23.869914,22.576735],[22.319914,22.677015],[20.764914,22.617115],[19.209914,22.557215],[18.604914,22.422085],[17.974914,22.255095],[17.928414,22.197895],[17.906914,22.172495],[10.503414,22.225795],[1.529914,22.289995],[-1.645086,22.289625],[-10.583827,22.225725],[-17.917573,22.173025],[-17.938823,22.198125],[-17.985073,22.254925],[-18.615719,22.421615],[-19.221365,22.556595],[-20.785719,22.616895],[-22.380072,22.675995],[-23.920073,22.576095]]);
  }
}

module arrow(h)
{
  union()
  {
    linear_extrude(height=h)
      polygon([[-10.286752,0.899845],[-11.076897,1.910865],[-13.300000,-2.189925],[-8.671237,-3.102895],[-8.994270,-1.868485],[-6.819661,-1.109760],[-4.702512,-0.608347],[-2.482609,-0.313158],[0.000262,-0.173105],[2.497179,-0.338619],[4.797999,-0.671681],[7.007755,-1.179301],[9.231479,-1.868485],[9.108475,-3.102895],[13.300000,-2.189925],[11.038358,1.910865],[10.265900,0.899845],[7.602175,1.811312],[5.124905,2.499336],[2.651724,2.938377],[0.000262,3.102895],[-2.721424,2.935405],[-5.277756,2.529966],[-7.766832,1.860230],[-10.286752,0.899845]]);
  }
}

```


[User]
I'm looking to create a parametric design for a push pin magnet holder that can accommodate different sized disc magnets. I've seen some designs out there, but I want one that’s highly customizable.

Specifically, I'd like the design to have these parameters:

*   `magnetDiam`: The diameter of the disc magnet.
*   `magnetHeight`: The height (or thickness) of the disc magnet.
*   `margin`: A tolerance around the magnet within the socket. This can be zero for a tight fit, positive for a looser fit, or even negative for an intentionally tighter fit.
*   `totalHeight`: The overall height of the push pin holder.

The design should include:

1.  A circular socket to hold the magnet at the base. This socket needs to account for the `magnetDiam`, `magnetHeight`, and the `margin`.
2.  A connecting link from the top of the socket to a disc shaped push pin handle.
3.  The push pin handle should have a flat top that a user could press and be a circle with a slightly larger diameter than the base (socket).
4.  The overall shape should be a rotationally symmetric object created with `rotate_extrude` for a smooth, rounded feel. The part will be rotated around the y-axis by 180 degrees.
5.  For smoothing, I think the `smooth` module shown in the example would be great - it uses multiple offsets.
6. The `PushPinMagnet` module should take all of the above parameters as arguments. I want the module to include a security variable that is used to give some extra space to the handle to avoid the sharp edge of the magnet.
7.  The main part should be a difference of two parts to be created within `rotate_extrude`. The first part is all the needed components to form the push pin holder. The second part cuts away the other half of the part after the shape is created so it can be rotated.

I want to be able to adjust these parameters to fit a variety of magnet sizes and preferences. Could you generate an OpenSCAD file that implements this? I don't need any libraries.

[Assistant]
PushPinMagnet.scad:
```
// Parametric model inspired by https://www.thingiverse.com/thing:2912160/files

$fn = 150;
magnetDiam = 10;
magnetHeight = 3;
margin = 0;
totalHeight = 17;

PushPinMagnet(magnetDiam = magnetDiam, magnetHeight = magnetHeight, margin = margin, totalHeight = totalHeight);

module smooth(rounding) {
    offset(rounding) { offset(-rounding) { offset(-rounding) { offset(rounding) {
        children(0);
    }}}}
}
module PushPinMagnet (magnetDiam, magnetHeight, totalHeight, margin) {
    security=2;
    // Extra size of circle around the magnet, we make sure to have at least
    // a space of 'security' between the corner of the magnet and the round part.
    border = sqrt(magnetDiam*magnetDiam/4 + magnetHeight*magnetHeight) + security - magnetDiam/2;

    rotate([0,180,0]) {
        rotate_extrude(angle = 360, convexity = 6) {
            difference () {
                smooth(0.3) {
                    union () {
                        // handle
                        translate ([0,totalHeight,0]) {
                            difference() {
                                circle(magnetDiam/2);
                                translate([0,magnetDiam/2]) { square([magnetDiam+1,magnetDiam], center = true); }
                            }
                        }
                        // Link
                        polygon([[-magnetDiam/2,magnetHeight],[magnetDiam/2,magnetHeight],[magnetDiam/5,totalHeight],[-magnetDiam/5,totalHeight]]);
                        // Socket
                        difference () {
                            circle(magnetDiam/2+border+margin);
                            translate([0,-magnetDiam/2]) { square([magnetDiam+2*border+2*margin+1,magnetDiam], center=true); }
                            // Room for the magnet
                            square([magnetDiam+2*margin,magnetHeight*2], center=true);
                        }
                    }
                }
                // Cutting half for rotate_extrude
                square([magnetDiam+border, totalHeight+1]);
            }
        }
    }
}

```


[User]
I'd like to create a 3D model of the SGI cube logo, but I want it to be parametric so I can easily adjust its size, smoothness, and other features. It should have the distinct appearance of interconnected cylinders forming a cube structure with rounded corners, similar to the original SGI logo.

Specifically, I need the following adjustable parameters:

*   **`cube_dia`**: The diameter of the cylindrical rods that form the cube's structure.
*   **`cube_size`**: The overall size of the cube (edge length, roughly).
*   **`cube_corner_radius`**: The radius of the rounded corners where the cylinders meet.
*   **`cube_gaps`**: The spacing or gap between adjacent cylinders.
*   **`$fn`**: The fragment number (number of facets) used to create smooth curves. This should be adjustable, and I'd like to be able to specify different `$fn` values for the circles and the rotated extrusions (elbows). Perhaps you could make `$fn` a single parameter and derive the others from it? I’m thinking the elbows would need a higher value than the cylinder circles.

The main features that need to be generated are:

1.  **Cylindrical Rods:** The core structure is made of cylindrical rods that form the edges of the cube, which should be connected at right angles, forming a sort of hollow cube skeleton.
2.  **Rounded Corners:** The intersections between these cylinders need to be smooth, using rounded elbows or bent cylinders.
3.  **Open Structure:** The final object will have an open or skeletal form, as opposed to a solid cube. The gaps are important.

I want to be able to adjust all of the parameters above and generate a functional, parametric design. The design should be made so that the connections work correctly no matter the value of the parameters (within reason, of course), and the cylinders should always meet up properly even when the parameters are varied.

I'd like to have all of this in one or more OpenSCAD files. Please use a single file if you think it's manageable. I don’t need any libraries to be attached as I have them installed already.

[Assistant]
sgi_cube.scad:
```
// Smooth SGI Cube Generator - 2019 sgstair@akkit.org

$fn = 48; // Should be a multiple of 4 for everything to connect up properly.
cube_dia = 7;
cube_size = 60;
cube_corner_radius = 8;
cube_gaps = 2;

// Computed values
  ang_dist = cube_dia + cube_gaps;
  cyl_dx = sqrt(ang_dist*ang_dist/2);
  cyl_x = cube_size/2 - cyl_dx - cube_dia/2;
  cyl_y = cyl_x + cyl_dx;
  cyl_x2 = cyl_x - cyl_dx;
  cyl_y2 = cyl_y - cyl_dx;
  cyl_length = cyl_x*2 - cube_corner_radius*2;
  cyl_e = cyl_x - cube_corner_radius;
  cyl_e2 = cyl_x2 - cube_corner_radius;
  cyl_cr = cube_corner_radius;

module elbow()
{
  rotate_extrude(angle=90, convexity=2, $fn=$fn*3)
  {
    translate([cube_corner_radius,0,0])
      circle(d=cube_dia, $fn = $fn/3);
  }
}
module cube_face()
{
  for(r = [0,90])
    rotate([r,0,0])
      translate([cyl_y, cyl_x, 0])
        cylinder(d=cube_dia, h=cyl_length, center=true);
  rotate([180,0,0])
    translate([cyl_y, cyl_x, -cyl_dx/2])
      cylinder(d=cube_dia, h=cyl_length-cyl_dx, center=true);
  rotate([270,0,0])
    translate([cyl_y, cyl_x, cyl_dx/2])
      cylinder(d=cube_dia, h=cyl_length-cyl_dx, center=true);
  for(r = [0,90,180])
    rotate([r,0,0])
      translate([cyl_y, cyl_e, -cyl_e])
        rotate([0,90,0])
          elbow();

  rotate([270,0,0])
  {
    translate([cyl_y-cyl_cr, cyl_e-cyl_dx, -cyl_e-cyl_cr])
      rotate([0,180,270])
        elbow();
    translate([cyl_y-cyl_cr, cyl_e+cyl_cr, -cyl_e+cyl_dx])
      rotate([180,90,90])
        elbow();
  }
}
module cube_face_partial()
{
  rotate([0,0,0])
    translate([cyl_y2, cyl_x2, -cyl_dx])
      cylinder(d=cube_dia, h=cyl_length, center=true);
  rotate([90,0,0])
    translate([cyl_y2, cyl_x2, cyl_dx])
      cylinder(d=cube_dia, h=cyl_length, center=true);

  rotate([90,0,0])
    translate([cyl_y2, cyl_e2, -cyl_e2])
      rotate([0,90,0])
        elbow();
}
module sgi_cube()
{

  union()
  {
    // For each face, draw the cylinders
    cube_face();
    rotate([270,270,0]) cube_face();
    rotate([270,180,270]) cube_face();

    rotate([270,90,90])cube_face_partial();
    rotate([0,180,90])cube_face_partial();
    rotate([270,0,180])cube_face_partial();
  }
}

sgi_cube();
```