[User]
I'm looking to create a parametric folding rod in OpenSCAD, similar to the one I have here but I need it to be fully parametric and I'd like to have some additional control over the joints.

Here's the basic idea: I want a central rod that can have joints at either end. These joints should allow for rotation in multiple directions. I want to control the size of the rod, the size of the joints, the size and placement of any internal ducts and the directions the joints face.

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

*   **`rod_size`**: The width/depth of the square rod.
*   **`rod_length`**: The length of the central rod section.
*   **`duct_dia`**: The diameter of any internal duct.
*  **`duct_insert`**: A boolean (or 0/1) flag to specify if an internal duct is included or not.
*   **`joint_a`**: An integer (0-4) representing the direction of joint A (0: no joint, 1: top, 2: bottom, 3: left, 4: right).
*   **`joint_b`**: An integer (0-4) representing the direction of joint B (0: no joint, 1: top, 2: bottom, 3: left, 4: right).
*   **`hole_dia`**: The diameter of the pin hole in the joint.
*   **`hole_tolerance`**: The tolerance added to the pin hole.

The duct, if included, should run down the center of the rod and be capped with angled spherical sections, like in the attached design. I'd like the joints to be flat faces that come off the sides of the rod with a circular base and a square-ish extrusion coming off the rod and connecting to that base - with the hole for the hinge pin running through the center of the circular base. I'd also like the joints to rotate in 90-degree increments. The exact look of the joint isn't critical, but something like the linked file is fine. I want to be able to use this part in other projects.

Could you generate a parametric OpenSCAD file (or files) for this? I'm not sure if that will require multiple files. I don't need to use any external libraries.

[Assistant]
FoldingRod.scad:
```
// File: FoldingRod.scad
// Version: OpenSCAD 2015.03-2
// Author: Kijja Chaovanakij
// Date: 2018.06.23
//
// Date: 2018.07.8
// Revise-1
// joint can rotate 4 directions
//
// Date: 2020.07.15
// Revise-2
// Rewrite for fast render

$fn=36; //[36:low, 48:medium, 60:high]

/*[rod]*/
rod_size=10; //10
rod_length=50; //50

/*[duct]*/
duct_dia=5; //5
duct_insert=1; //[0:no, 1:yes]

/*[joint]*/
hole_dia=2.7;
hole_tolerence=0.4;
joint_a=1; //[0:no joint,1:top,2:bottom,3:left,4:right]
joint_b=3; //[0:no joint,1:top,2:bottom,3:left,4:right]

/*[Hidden]*/
duct_length=rod_length-rod_size*sqrt(2)-duct_dia*2;

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

difference(){
  rod();
  if (duct_insert==1)
    duct();
}//d
//

//rod();
module rod(){
  color("Goldenrod")
  cube([rod_size,rod_length,rod_size],true);
  if (joint_a==1)
    translate([0, (rod_length+rod_size)/2, 0])
      joint();
  if (joint_a==2)
    translate([0, (rod_length+rod_size)/2, -rod_size/2])
      joint();
  if (joint_a==3)
    translate([-rod_size/2, (rod_length+rod_size)/2, 0])
    rotate([0,90,0])
      joint();
  if (joint_a==4)
    translate([0, (rod_length+rod_size)/2, 0])
    rotate([0,90,0])
      joint();

  if (joint_b==1)
    translate([0, -(rod_length+rod_size)/2, 0])
    rotate([0,0,180])
      joint();
  if (joint_b==2)
    translate([0, -(rod_length+rod_size)/2, -rod_size/2])
    rotate([0,0,180])
    joint();
  if (joint_b==3)
    translate([0, -(rod_length+rod_size)/2, 0])
    rotate([0,90,180])
      joint();
  if (joint_b==4)
    translate([rod_size/2, -(rod_length+rod_size)/2, 0])
    rotate([0,90,180])
      joint();
}//m
//

//joint();
module joint(){
  color("Gold")
  linear_extrude(rod_size/2)
  difference(){
    union(){
      circle(d=rod_size);
      translate([0,-rod_size/4,0])
        square([rod_size, rod_size/2],true);
    }//u
    circle(d=hole_dia+hole_tolerence, $fn=24);
  }//d
}//m
//

//duct();
module duct(){
  $fn=32;
  hull(){
    for (i=[duct_length/2, -duct_length/2])
      translate([0, i, 0])
        sphere(d=duct_dia);
  }//h
  translate([0, duct_length/2, 0])
  rotate([-45, 0, 0])
    cylinder(h=duct_length, d=duct_dia);
  translate([0, -duct_length/2, 0])
  rotate([45, 0, 0])
    cylinder(h=duct_length, d=duct_dia);
}//m
//
```


[User]
Hey, I'm looking for an OpenSCAD design for a bed leveling test print. It should generate a series of squares at the corners and center of the bed, and I need it to be fully customizable for bed size and layer height.

Right now, I just have a basic version in a single file, but I'd love a better version. I'm envisioning the following:

*   **Customizable bed dimensions:** I need to be able to specify the bed's X and Y dimensions.
*   **Customizable square size:** The size of the individual squares/pads should be adjustable.
*   **Customizable layer height:** The initial layer height for the print should be a parameter.
*   **Customizable offset from edges:** I should be able to adjust how far the squares are from the edges of the bed.
*   **Specific locations of squares:** The squares should be placed at each corner and at the center of the print bed.
*   **Single File Output:** I would prefer this to output as a single OpenSCAD (.scad) file, not multiple files.
*   **No library dependencies:** Ideally, I'd like to avoid external libraries if possible. If you have to use them, though, please let me know which ones and why.

Basically, I'm trying to make it really easy for myself to generate these leveling test prints for different printers and settings without having to edit the .scad file directly.

[Assistant]
bed_level_tool.scad:
```
BX=220; //Bed X dimension in mm
BY=220; //Bed Y dimension in mm
LH=.4; //Initial layer height
SQ=20; //Size of square pads
OFF=30; //Offset from edges in mm
module Target(){
    cube([SQ,SQ,LH],center=true);
}
MFact = OFF+SQ/2;
MX = BX-MFact;
MY = BY-MFact;
translate([MFact,MFact,0])Target();
translate([MX,MFact,0])Target();
translate([MFact,MY,0])Target();
translate([MX,MY,0])Target();
translate([BX/2,BY/2,0])Target();
```


[User]
Hey, I need some help designing some vice jaw plates. I have a SCAD file that I'm working from, but I'd like to make it parametric so I can easily adjust it for different sized vises.

The basic design is a rectangular bar with a couple of countersunk screw holes and some rounded edges. I'm going to paste the SCAD file I'm using below as a reference. Could you help me turn this into a fully parametric design? I'd prefer the file to be easily customizable from the top level rather than forcing me to go deep into the code if possible.

Here's the SCAD file I have:

```scad
bar_width = 114;
bar_depth = 6.5;   // normal is ~5
bar_heigh = 14.1;

screw_r1 = 5.45/2;
screw_h1 = 2.66;
screw_r2 = 10.45/2;
screw_h2 = 5-2.66;

screw_offx = 19.33+5.45/2;
screw_offy = 3.89+5.45/2;

chopsize = 1;

// the main bar
rotate([0,0,45])
difference()
{
    // the bar (base)
    linear_extrude(height=bar_depth)
        square([bar_width,bar_heigh]);

    // cutout the screw holes
    for(i=[screw_offx, bar_width-screw_offx]) translate([i,screw_offy,0]) union()
    {
        cylinder(h=screw_h1+0.1, r=screw_r1, $fn=18);
        translate([0,0,screw_h1]) cylinder(h=screw_h2, r1=screw_r1, r2=screw_r2, $fn=18);
        translate([0,0,screw_h1+screw_h2])
            cylinder(h=bar_heigh-screw_h2-screw_h1+0.1, r=screw_r2, $fn=18);
    }

    // cutout the bottom rounded area
    translate([-0.1,-0.1,-0.1])
    rotate([0,90,0]) rotate([0,0,90]) linear_extrude(height=bar_width+0.2)
        polygon(points=[[0,0], [0,chopsize], [chopsize,0]], paths=[[0,1,2]]);

    // round off the top
    translate([-0.1,bar_heigh/2,bar_depth+0.2]) rotate([0,90,0]) scale([0.2,1,1])
        cylinder(h=bar_width+0.2, r=(bar_heigh-3)/2, $fn=40);
}
```

Ideally, the parameters I'd like to control are:

*   `bar_width`: The overall width of the jaw plate.
*   `bar_depth`: The thickness of the plate.
*   `bar_heigh`: The height of the main rectangular part of the plate
*   `screw_r1`: The radius of the smaller part of the countersunk screw hole.
*   `screw_h1`: The depth of the smaller part of the countersunk screw hole.
*   `screw_r2`: The radius of the larger part of the countersunk screw hole.
*    `screw_h2`: The depth of the larger part of the countersunk screw hole.
*   `screw_offx`: The horizontal offset of the screw holes from the edges of the plate.
*   `screw_offy`: The vertical offset of the screw holes from the bottom edge of the plate.
*   `chopsize`: The size of the corner chamfer at the base.
* `roundover_r`: The radius of the roundover at the top of the part.  I don't need this to necessarily be a function of height.

I'd prefer if the screw hole parameters were all in relation to the _top_ of the plate rather than the bottom like in the given code. Also, if possible, could the rounding at the top be controlled with a true radius of the roundover instead of scaling a cylinder? It seems like it would be easier to manage that way.  I'd also prefer to use `union()` instead of the `for()` loop, as it's more readable to me.

I think that's everything. Thanks for your help!

[Assistant]
C__fakepath_irwin_bench_vise_grip.scad:
```

bar_width = 114;
bar_depth = 6.5;   // normal is ~5
bar_heigh = 14.1;

screw_r1 = 5.45/2;
screw_h1 = 2.66;
screw_r2 = 10.45/2;
screw_h2 = 5-2.66;

screw_offx = 19.33+5.45/2;
screw_offy = 3.89+5.45/2;

chopsize = 1;

// the main bar
rotate([0,0,45])
difference()
{
    // the bar (base)
    linear_extrude(height=bar_depth)
        square([bar_width,bar_heigh]);

    // cutout the screw holes
    for(i=[screw_offx, bar_width-screw_offx]) translate([i,screw_offy,0]) union()
    {
        cylinder(h=screw_h1+0.1, r=screw_r1, $fn=18);
        translate([0,0,screw_h1]) cylinder(h=screw_h2, r1=screw_r1, r2=screw_r2, $fn=18);
        translate([0,0,screw_h1+screw_h2])
            cylinder(h=bar_heigh-screw_h2-screw_h1+0.1, r=screw_r2, $fn=18);
    }

    // cutout the bottom rounded area
    translate([-0.1,-0.1,-0.1])
    rotate([0,90,0]) rotate([0,0,90]) linear_extrude(height=bar_width+0.2)
        polygon(points=[[0,0], [0,chopsize], [chopsize,0]], paths=[[0,1,2]]);

    // round off the top
    translate([-0.1,bar_heigh/2,bar_depth+0.2]) rotate([0,90,0]) scale([0.2,1,1])
        cylinder(h=bar_width+0.2, r=(bar_heigh-3)/2, $fn=40);
}

```


[User]
I'd like to create a vase with a customizable pattern around the outside. The pattern should consist of a series of cylinders and cubes that change in size and rotate as they move up the vase. The pattern should also be able to be mirrored on the opposite side. Here are the specifics:

**Pattern Parameters:**
*   `Pattern_amplitude`: This will control the maximum size of the cylinders and cubes in the pattern. Let's set this to 25 initially.
*   `Pattern_Bars`: This will determine the number of 'bars' or steps in the pattern progression from the start to the max amplitude. I'd like 100.
*   `Pattern_Rotation_Degrees`: This sets the total rotation of the pattern as it moves along the vase. Let's start with 720 degrees.
*   `Pattern_Constant_X_C`: This scales the x-dimension of the cubes. I'll start with 20.
*   `Pattern_Constant_Y_C`: This scales the y-dimension of the cubes, and I'll start this at 2.
*  `Pattern_Forward`: how much pattern moves along x axis when cylinder and cube gets bigger, lets start at 10.
*   `Pattern_Backward`: how much pattern moves along y axis when cylinder and cube gets bigger, lets start at 12.
*   `Pattern_Scale_X`, `Pattern_Scale_Y`, `Pattern_Scale_Z`: These will scale the entire pattern - initial values should be 2, 0.75, and 1 respectively.
*   `Pattern_Double`: A boolean value to mirror the pattern - lets start at `true`
*   `Pattern_Start`: This is the bar number of the starting pattern element, lets start at 10.

**Vase Parameters:**

*   `Vase_height`: The overall height of the vase; I'd like this to be 200.
*   `Vase_wall_thickness`: How thick the walls of the vase are; let's set this at 3.
*  `Vase_bottom_radius`: Radius of the cylinder at the base of the vase; I'm thinking 100.
*   `Vase_bottom_thickness`: The thickness of the base; let's use 3.
*   `Topside_ring_height`: The height of a decorative ring at the top of the vase; this can be 10.
*   `Topside_ring_offset`: Offset from the top, start with 0
*   `Bottomside_ring_height`: The height of a decorative ring at the bottom of the vase; let's use 10.
*   `Bottomside_ring_offset`: offset from the bottom, start with 0.
*   `Vase_radius`: The radius of the main body of the vase; let's make this 200.
*   `Offset`: The offset from the center of the sphere for creating the vase form, lets start with 50.
*   `Vase_scale_X`, `Vase_scale_Y`, `Vase_scale_Z`: These will scale the entire vase - lets start at 1 for each

The vase should be created using a sphere, and then subtracting the inner vase shape. Additionally, create the rings, a base and the custom pattern around it.

I'm not familiar with OpenSCAD libraries, so I guess this should all be defined in the same .scad file.

[Assistant]
Vaso_ovoidale.scad:
```
Pattern_amplitude=25;
Pattern_Bars=100;
Pattern_Rotation_Degrees=720;
Pattern_Constant_X_C=20;
Pattern_Constant_Y_C=2;
Pattern_Forward=10;
Pattern_Backward=12;
Pattern_Scale_X=2;
Pattern_Scale_Y=0.75;
Pattern_Scale_Z=1;
Pattern_Double=true;
Pattern_Start=10;

Vase_height=200;
Vase_wall_thickness=3;
Vase_bottom_radius=100;
Vase_bottom_thickness=3;
Topside_ring_height=10;
Topside_ring_offset=0;
Bottomside_ring_height=10;
Bottomside_ring_offset=0;
Vase_radius=200;
Offset=50;
Vase_scale_X=1;
Vase_scale_Y=1;
Vase_scale_Z=1;

$fn=36;

b=Pattern_amplitude;            //Ampiezza

c=Pattern_Bars;      //Inizio
d=Pattern_Rotation_Degrees;       //Gradi giro

kxc=Pattern_Constant_X_C;          //Coeffieciente divisione x del cubo
kyc=Pattern_Constant_Y_C;          //Coeffieciente divisione y del cubo
x=Pattern_Forward;
y=Pattern_Backward;

scalex=Pattern_Scale_X;
scaley=Pattern_Scale_Y;
scalez=Pattern_Scale_Z;

spessore=Vase_height;

difference()
{
    union()
    {
    intersection()
        {
        union()
            {
            for(a=[b/c*Pattern_Start:b/c:b])
                {
                if(a<b/2)
                rotate([0,0,d/b*a])
                translate([a*x,a*y,0])
                 rotate([0,0,a])
                  scale([scalex,scaley,scalez])
                    {
                   cylinder(r=a,h=spessore*2,center=true);
                    rotate([0,0,0])
                   cube([a*kxc,a/kyc,spessore*2],center=true);
                    }
                if(a>=b/2)
                rotate([0,0,d/b*a])
                translate([(b-a)*x,a*y,0])
                 rotate([0,0,a])
                  scale([scalex,scaley,scalez])
                    {
                   cylinder(r=b-a,h=spessore*2,center=true);
                    rotate([0,0,0])
                   cube([(b-a)*kxc,(b-a)/kyc,spessore*2],center=true);
                    }
                }
    if(Pattern_Double==true)
    rotate([0,0,180])
    for(a=[b/c*Pattern_Start:b/c:b])
                {
                if(a<b/2)
                rotate([0,0,d/b*a])
                translate([a*x,a*y,0])
                 rotate([0,0,a])
                  scale([scalex,scaley,scalez])
                    {
                   cylinder(r=a,h=spessore*2,center=true);
                    rotate([0,0,0])
                   cube([a*kxc,a/kyc,spessore*2],center=true);
                    }
                if(a>=b/2)
                rotate([0,0,d/b*a])
                translate([(b-a)*x,a*y,0])
                 rotate([0,0,a])
                  scale([scalex,scaley,scalez])
                    {
                   cylinder(r=b-a,h=spessore*2,center=true);
                    rotate([0,0,0])
                   cube([(b-a)*kxc,(b-a)/kyc,spessore*2],center=true);
                    }
                }
            translate([0,0,spessore-Topside_ring_height+Topside_ring_offset])
                cylinder(r=500,h=Topside_ring_height);
            translate([0,0,Bottomside_ring_offset])
                cylinder(r=500,h=Bottomside_ring_height);
            }

            difference()
                {
                difference()
                    {
                    scale([Vase_scale_X,Vase_scale_Y,Vase_scale_Z])
                        translate([0,0,Offset])
                            sphere(r=Vase_radius);
                    translate([0,0,-Vase_radius*Vase_scale_Z])
                        cylinder(r=Vase_radius*Vase_scale_Z,h=Vase_radius*Vase_scale_Z);
                    translate([0,0,Vase_height])
                        scale([Vase_scale_X,Vase_scale_Y,Vase_scale_Z])
                            cylinder(r=Vase_radius*Vase_scale_Z,h=Vase_radius*Vase_scale_Z);
                    }

                difference()
                    {
                    scale([Vase_scale_X,Vase_scale_Y,Vase_scale_Z])
                      translate([0,0,Offset])
                        sphere(r=Vase_radius-Vase_wall_thickness);
                    translate([0,0,-Vase_radius*2*Vase_scale_Z])
                        scale([Vase_scale_X,Vase_scale_Y,Vase_scale_Z])
                            cylinder(r=Vase_radius*Vase_scale_Z,h=Vase_radius*2);
                    }
                }
        }

   translate([0,0,0])
cylinder(r=Vase_bottom_radius,h=Vase_bottom_thickness);
    }

}

```


[User]
I need a design for creating stencils to spray paint numbers onto the angled tops of wooden Mölkky blocks. I have a basic understanding of OpenSCAD but am looking for a more flexible design where I can adjust parameters easily.

The basic idea is a stencil that fits over the top of a cylindrical block with a sloped top. The stencil itself should be a cylinder with a cutout for the number.

Here's what I need to control via parameters:
*   **`block_diameter`**: The diameter of the Mölkky block cylinder (around 55mm).
*   **`block_height`**: The height of the Mölkky block (around 150mm).
*   **`slope_angle`**: The angle of the sloped top surface (probably 45 degrees).
*   **`stencil_thickness`**: The thickness of the stencil material.
*   **`number_font`**: The font to use for the numbers.
*   **`number_size`**: The size of the number.
*   **`number_y_offset`**: The offset of the number from the center of the stencil (on the Y-axis).
*   **`number`**: A text parameter to specify the number that will be cut out.

The design should create a single stencil for a given number. I'd like to avoid the `hull()` module if possible in favor of a simpler and more precise extrusion/difference approach. I also need to be able to output a single stencil for each of numbers 1-12.

Could you generate an OpenSCAD file for this, or several if that makes sense? I'm not requesting a file that calls another external library, so please make sure everything is included in the generated files.

[Assistant]
moelkky.scad:
```
// Schräge, auf welcher die Zahl steht
winkel = 45;

// Innendurchmesser
durchmesser = 56;

// Höhe
hoehe = 70;

// Schriftart
font = "Stencil";

// Schriftgröße
fontsize = 33;

// Wandstärke
HullSize = 2;

// Y-Offset der Schrift
YOffset = -3;

//drawAll();
//drawSingleOne("1");
//drawSingleOne("2");
//drawSingleOne("3");
//drawSingleOne("4");
//drawSingleOne("5");
//drawSingleOne("6");
//drawSingleOne("7");
//drawSingleOne("8");
//drawSingleOne("9");
drawSingleOne("10");
//drawSingleOne("11");
//drawSingleOne("12");

// -------------------------------------------------------------------------------------------

module drawAll() {
    for(i=[1:12]) {
        translate([0, (i-1)*(durchmesser+HullSize*2+5), 0]) {
            drawSingleOne(i);
        }
    }
}

// -------------------------------------------------------------------------------------------

module drawSingleOne(nr) {
    difference() {
        drawHull();

        drawChunk();
        drawText(str(nr));
    }
}

// -------------------------------------------------------------------------------------------

module drawHull() {
    hull() {
        cylinder(r=durchmesser/2+HullSize, h=1, $fn = 64);
        translate([0, 0, hoehe-((durchmesser)/2)*tan(winkel) + HullSize/cos(winkel)])
            rotate([0, winkel, 0]) resize([(durchmesser+HullSize*2)/cos(winkel), durchmesser+HullSize])
                cylinder(r=durchmesser/2+HullSize*2, h=0.0001, center=true, $fn = 64);
    }
}

// -------------------------------------------------------------------------------------------

module drawChunk() {
    hull() {
        cylinder(r=durchmesser/2, h=1, $fn = 64);
        translate([0, 0, hoehe-(durchmesser/2)*tan(winkel)])
            rotate([0, winkel, 0]) resize([durchmesser/cos(winkel), durchmesser])
                cylinder(r=durchmesser/2, h=0.0001, center=true, $fn = 64);
    }
}

// -------------------------------------------------------------------------------------------

module drawText(text) {
    translate([0, YOffset, hoehe-(durchmesser/2)*tan(winkel)])   // verschiebung auf Y wegen spacing des textes notwendig.
        rotate([winkel, 0, 90])
            //color("gray")
                     linear_extrude(height=hullSize)
                        text(text=text, font=font, size=fontsize, valign="center", halign="center", spacing=0.8);
}

```


[User]
I want a design for a parametric vase generator in OpenSCAD. It should use a cubic Bezier curve for the profile, with four control points that I can adjust. I need to be able to set the number of faces (like a polygon), the wall thickness, the bottom thickness, and the Z-offset of the bottom of the vase. Also, let me rotate the bottom cylinder relative to the rest of the vase, for aesthetic purposes.

It would be helpful if I had an option to toggle the drawing of the control lines of the Bezier curve -- I'd want that to be on by default, but I need to be able to turn it off when I go to render. Also, the resolution of the Bezier curve needs to be adjustable. Finally, please include links to parts suppliers; that is incredibly useful.

[Assistant]
vaso_bezier_1.scad:
```

/*[Coordinates]*/
point1x=80;
point1z=0;
point2x=150;
point2z=80;
point3x=150;
point3z=120;
point4x=20;
point4z=200;
/*[Parameters]*/
Faces=4;
wall_thickness=4;//[0.1:0.1:100]
bottom_thickness=5;
bottom_Z_offset=0;
bottom_rotation=360/Faces/2;
resolution=0.01; //[0.01:0.01:0.1]

show_origin_line=1;

$fn=Faces;

function curve_bezier_3(point1,point2,point3,point4)=
    [for(a=[0:resolution:1])
        point1*pow(1-a,3)+3*point2*a*pow(1-a,2)+3*point3*pow(a,2)*(1-a)+point4*pow(a,3)];

module line(point1,point2,width)
    {
        hull()
            {
            translate(point1)
                circle(d=width/2);
            translate(point2)
                circle(d=width/2);
            }
    }

module track(points,index,width)
{
    if(index<len(points))
        {
        line(points[index-1],points[index],width);
        track(points,index+1,width);
        }
}

point1=concat(point1x,point1z);
point2=concat(point2x,point2z);
point3=concat(point3x,point3z);
point4=concat(point4x,point4z);

points1=[point1,point2,point3,point4];

if(Faces%2==1)
{
rotate_extrude() track(curve_bezier_3(point1,point2,point3,point4),1,wall_thickness);
translate([0,0,bottom_Z_offset])
rotate([0,0,bottom_rotation])
cylinder(r=point1x,h=bottom_thickness);
echo(point1x);
}
else
{
rotate_extrude() track(curve_bezier_3(point1,point2,point3,point4),1,wall_thickness);
translate([0,0,bottom_Z_offset])
rotate([0,0,bottom_rotation*2])
cylinder(r=point1x,h=bottom_thickness);
}

if(show_origin_line==0)
rotate([90,0,0])
{
    line(point1,point2,wall_thickness);
line(point2,point3,wall_thickness);
line(point3,point4,wall_thickness);
track(curve_bezier_3(point1,point2,point3,point4),1,wall_thickness);
}
```


[User]
Hey, I'm looking to create a customizable box using OpenSCAD, and I've got a few examples of what I'm after, but I'd like to have it all in one parametric file. Basically, I need a box with rounded corners, and it should be easy to adjust the dimensions.

Here's what I need in terms of parameters:

*   **Overall Dimensions:**
    *   `x`: Length of the box.
    *   `y`: Width of the box.
    *   `z`: Height of the box.

*   **Wall and Base Thickness:**
    *   `wall_thickness`: Thickness of the walls.
    *   `base_thickness`: Thickness of the base.

*   **Corner Radius:**
    *   `chamfer_edge`: Radius for the rounded corners.

The box should be created by subtracting a smaller rounded box from a larger one, leaving the walls and base. I'd also like to use the `hull()` function, similar to the examples I've got.

Could you write an OpenSCAD file for me that does all of this and also includes comments within the code explaining each section? I'd like to be able to change the `$fn` variable, so make sure it's handled correctly, maybe with something like `$fn = $fn + 250;`

The examples I've been working with are called `basic-af-box-v2.scad`, `round_basic-af-box-v2.scad`, and `small_basic-af-box-v2.scad`, but please don't rely on their exact code - just the concept. I'm not sure if this is a library, but all of the examples use a `roundedcube` module to create the shape. Let me know if you'd like any clarification. Thanks!

[Assistant]
basic-af-box-v2.scad:
```
//basic af box
// preview[view:south, tilt:top]

//CUSTOMIZER VARIABLES
$fn = $fn + 250;

//Length
x = 50; // [1:150]
//Width
y = 50; // [1:150]
//Height
z = 25; // [1:150]

wall_thickness = 1; // [1:150]
base_thickness = 1; // [1:150]
chamfer_edge = 5; // [1:150]

//CUSTOMIZER VARIABLES END

difference(){
    roundedcube(x,y,z,chamfer_edge);
    translate([wall_thickness,wall_thickness,base_thickness])
    roundedcube(x-(wall_thickness*2),y-(wall_thickness*2),z,chamfer_edge);
}

module roundedcube(xdim ,ydim ,zdim,rdim){
hull(){
    translate([rdim,rdim,0])cylinder(h=zdim,r=rdim);
    translate([xdim-rdim,rdim,0])cylinder(h=zdim,r=rdim);
    translate([rdim,ydim-rdim,0])cylinder(h=zdim,r=rdim);
    translate([xdim-rdim,ydim-rdim,0])cylinder(h=zdim,r=rdim);
}}
```
round_basic-af-box-v2.scad:
```
//basic af box
// preview[view:south, tilt:top]

//CUSTOMIZER VARIABLES
$fn = $fn + 250;

//Length
x = 50; // [1:150]
//Width
y = 50; // [1:150]
//Height
z = 25; // [1:150]

wall_thickness = 1; // [1:150]
base_thickness = 1; // [1:150]
chamfer_edge = 20; // [1:150]

//CUSTOMIZER VARIABLES END

difference(){
    roundedcube(x,y,z,chamfer_edge);
    translate([wall_thickness,wall_thickness,base_thickness])
    roundedcube(x-(wall_thickness*2),y-(wall_thickness*2),z,chamfer_edge);
}

module roundedcube(xdim ,ydim ,zdim,rdim){
hull(){
    translate([rdim,rdim,0])cylinder(h=zdim,r=rdim);
    translate([xdim-rdim,rdim,0])cylinder(h=zdim,r=rdim);
    translate([rdim,ydim-rdim,0])cylinder(h=zdim,r=rdim);
    translate([xdim-rdim,ydim-rdim,0])cylinder(h=zdim,r=rdim);
}}
```
small_basic-af-box-v2.scad:
```
//basic af box
// preview[view:south, tilt:top]

//CUSTOMIZER VARIABLES
$fn = $fn + 250;

//Length
x = 10; // [1:150]
//Width
y = 10; // [1:150]
//Height
z = 10; // [1:150]

wall_thickness = 1; // [1:150]
base_thickness = 1; // [1:150]
chamfer_edge = 1; // [1:150]

//CUSTOMIZER VARIABLES END

difference(){
    roundedcube(x,y,z,chamfer_edge);
    translate([wall_thickness,wall_thickness,base_thickness])
    roundedcube(x-(wall_thickness*2),y-(wall_thickness*2),z,chamfer_edge);
}

module roundedcube(xdim ,ydim ,zdim,rdim){
hull(){
    translate([rdim,rdim,0])cylinder(h=zdim,r=rdim);
    translate([xdim-rdim,rdim,0])cylinder(h=zdim,r=rdim);
    translate([rdim,ydim-rdim,0])cylinder(h=zdim,r=rdim);
    translate([xdim-rdim,ydim-rdim,0])cylinder(h=zdim,r=rdim);
}}
```


[User]
Hey! I'm looking to design a tablecloth clamp, and I found a great example online that's already done in OpenSCAD, but I'd like to have the code generated for me from scratch so I can get a better understanding of how it's done.

Here's a breakdown of the features of the clamp, based on the existing code:

**Overall Structure:**

*   The clamp is designed to attach to a table, clamping the tablecloth between the top and bottom parts.
*   It has a curved profile that fits over the edge of the table.
*   It should be fully parametric, with adjustable table thickness, clamp depth, clamp width, and profile height.
*   It has a "tabletop dummy" for previewing that should be rendered when the user presses F5.

**Key Components:**

*   **Arc (Bogen):** The main curved section of the clamp, which goes over the edge of the table.
    *   It's created using a difference of cylinders and cubes.
    *   It includes a semi-circular cutout.
*   **Top (Oben):**
    *   A box profile that sits on top of the table.
    *   It has a hollowed-out section and glide bearings on the sides.
*   **Bottom (Unten):**
    *   A box profile that sits under the table.
    *   It's similar to the top but only extends 2/3 of the depth of the top, and includes different glide bearing structures.
*  **Top Head (Kopfstueck) and Bottom Head (Kopfstueck):**
    * A circular feature on the top and bottom that blends into the corresponding box profiles.
    * The circular feature is composed of a cylinder and a resized sphere.
*   **Glide Bearings (Gleitlager):**
    *   Cylindrical structures with hemispherical ends that act as contact points, placed on the sides of the top and bottom profiles.
    * There are two sets of glide bearings: `Gleitlager` and `Gleitlager_2` and the bearing length varies based on whether they are in the top or bottom profile.
    * The `resize()` command is used to make the bearings printable on their sides.

**Parameters:**

*   `Tischplatte`: Tabletop thickness.
*   `KlammerTiefe`: Clamp depth.
*   `KlammerBreite`: Clamp width.
*   `Profilhoehe`: Profile height.
*   `Zylinder`: Calculated height based on `Profilhoehe` + 2.

**Specific Instructions:**

*   I need all of the code to be generated, including the modules.
*   Please use comments to explain what each section of the code is doing, especially when complex shapes are used.
*   I'm not using any external libraries for this design.
*   The preview dummy for the tabletop should be a transparent object so it doesn't obscure the view when rendering.

Can you help me generate the OpenSCAD code for this?

[Assistant]
Tischdeckenklammer_V3.scad:
```
/*Tischdeckenklammer - tablecloth clamp V3
20180616 P. de Graaff
20180618 Parameter neu an "Tischplatte" angepasst
20180623 Gleiterlager resize fuer bessere Druckbarkeit auf der Seite liegend
*/
Tischplatte=28.3;   //Staerke Tischplatte - tabletop thickness
KlammerTiefe=60;    //clamp depth
KlammerBreite=30;   //clamp width
Profilhoehe=4;      //profile height
Zylinder=Profilhoehe+2;

//Tischplattendummy zur Kontrolle bei Vorschau F5 - tabletop dummy for preview control F5
%translate([0,0,-Tischplatte/2])cube([KlammerBreite,100,Tischplatte]);

//Bogen - arc
difference(){
rotate([90,0,90])
    difference(){
        cylinder(d=Tischplatte+Zylinder+Profilhoehe,h=KlammerBreite,$fn=120);
        translate([0,0,-1])cylinder(d=Tischplatte+Zylinder-Profilhoehe,h=KlammerBreite+2,$fn=100);
        //Hälfte entfernen
        translate([0,-(Tischplatte)/2-2*Profilhoehe,-1])cube([KlammerBreite,KlammerTiefe,Tischplatte+2*Profilhoehe]);
    }
    //Halbkreisförmiger Ausschnitt
    translate([KlammerBreite/2,0,-Tischplatte/2-Profilhoehe-10])cylinder(d=KlammerBreite-10,2*Profilhoehe+Tischplatte+15,$fn=120);
    }
//Oben - top
//Kastenprofil
translate([0,0,(Tischplatte+Zylinder-Profilhoehe)/2])difference(){
    cube([KlammerBreite,KlammerTiefe,Profilhoehe]);
    translate([5,-1,-2])cube([KlammerBreite-10,KlammerTiefe+1,Profilhoehe+4]);
}
//Gleitprofile
Gleitlager(5/2,-4,(Tischplatte+Zylinder)/2);
Gleitlager(KlammerBreite-5/2,-4,(Tischplatte+Zylinder)/2);

//Kopfstueck
translate([KlammerBreite/2,KlammerTiefe,(Tischplatte+Zylinder-Profilhoehe)/2])
{
    cylinder(d=KlammerBreite,h=Profilhoehe,$fn=120);
    translate([0,0,Profilhoehe/2])resize(newsize = [KlammerBreite,KlammerBreite,Zylinder]) sphere(d=KlammerBreite,$fn=100);
}

//Unten - bottom
//Kastenprofil
translate([0,0,-(Tischplatte+Zylinder+Profilhoehe)/2])difference(){
    cube([KlammerBreite,2*KlammerTiefe/3,Profilhoehe]);
    translate([5,-1,-2])cube([KlammerBreite-10,KlammerTiefe+1,Profilhoehe+4]);
}
//Kopfstueck
translate([KlammerBreite/2,2*KlammerTiefe/3,-(Tischplatte+Zylinder+Profilhoehe)/2]){
    cylinder(d=KlammerBreite,h=Profilhoehe,$fn=120);
    translate([0,0,Profilhoehe/2])resize(newsize = [KlammerBreite,KlammerBreite,Zylinder]) sphere(d=KlammerBreite,$fn=100);
}
Gleitlager_2(5/2,-4,-(Tischplatte+Zylinder)/2);
Gleitlager_2(KlammerBreite-5/2,-4,-(Tischplatte+Zylinder)/2);

module Gleitlager(x,y,z){
    translate([x,y+Zylinder,z])rotate([-90,0,0])resize(newsize=[(KlammerBreite-10)/4,Zylinder,KlammerTiefe-12])cylinder(d=Zylinder,h=KlammerTiefe-20,$fn=50);
    translate([x,y+Zylinder,z])resize(newsize=[(KlammerBreite-10)/4,Zylinder,Zylinder])sphere(Zylinder/2,$fn=100);//resize fuer bessere Druckbarkeit
    translate([x,y+Zylinder+KlammerTiefe-12,z])resize(newsize=[(KlammerBreite-10)/4,Zylinder,Zylinder])sphere(Zylinder/2,$fn=100);
}
module Gleitlager_2(x,y,z){
    translate([x,y+Zylinder,z])rotate([-90,0,0])resize(newsize=[(KlammerBreite-10)/4,Zylinder,2*KlammerTiefe/3-10])cylinder(d=Zylinder,h=2*KlammerTiefe/3-10,$fn=50);
    translate([x,y+Zylinder,z])resize(newsize=[(KlammerBreite-10)/4,Zylinder,Zylinder])sphere(Zylinder/2,$fn=100);
    translate([x,y+2*KlammerTiefe/3-Zylinder*2/3,z])resize(newsize=[(KlammerBreite-10)/4,Zylinder,Zylinder])sphere(Zylinder/2,$fn=100);
}
```


[User]
I'm looking to create a customizable chain link system, similar to what's described in the provided text. I need the ability to generate several different link types, all based on a few core parameters.

Here's a breakdown of what I'm envisioning, and what I'd like the OpenSCAD code to be able to handle:

**Core Parameters:**

*   **`axleDiameter`:** The diameter of the axle that connects the links. This should be adjustable, and I imagine it in the range of 1 to 10, with steps of 0.5.
*   **`wallThickness`:** The thickness of the walls of the link. I'd like to be able to set this, probably between 1 and 5, also with 0.5 increments.
*   **`clearance`:** The space between moving parts. I'd like this adjustable as well, maybe between 0.1 and 0.5, with 0.05 increments.
*   **`centerLinkWidth`:** The width of the central link (type-C). This should be adjustable, say from 1 to 10, in 0.5 increments.
*   **`otherLinkWidth`:**  The width of all the other, non-central, links. Adjustable from 1 to 10, in 0.5 increments.
*   **`numLinksOnEachSide`:** The number of links extending from each side of the central link. I'd like to vary this, from 1 to maybe 4 or 5.
*  **`extraLength`:**  A way to make links longer by adding extra length to the middle of the link. This should range from 0 to 25, in integer steps.
*   **`pocketDepth`:**  The depth of the pocket for type-P links. This should be adjustable in the range of 0 to 20, with 0.5 increments.
*  **`magnetDiameter`:** The diameter of the magnet used for the type-M links, adjustable from 1 to 25, in 0.1 increments.
* **`magnetLength`:** The length of the magnet used for type-M links.  Adjustable from 1 to 25, in 0.1 increments.
*  **`topStopAngle`:** An angle that can limit the rotation of the links.  This should be adjustable from 0 to 90, with 90 meaning no stop.
*  **`bottomStopAngle`:**  An angle that can limit the rotation of the links on the bottom side.  Adjustable from 0 to 90, with 90 meaning no stop.

**Link Types:**

I need to be able to generate these different types of links based on a parameter, likely called `partToPrint`.

*   **Type-A (link with axle):** This is a basic link with axles on both sides.
*   **Type-B (link with bushing):** A link with bushings to connect to the type-A links.
*   **Type-C (center link):**  Essentially another Type-B link, but allows the `centerLinkWidth` to be different from the `otherLinkWidth`.
*   **Type-M (magnet lock):** This link has a pocket to house a magnet.
*   **Type-P (pocket):** A link with a pocket feature.
*   **Type-T (transformation link):**  This link allows you to connect chains of different widths together.

**Specific Requirements:**

*   The links should lie flat on the print bed.
*   The axles should be printed horizontally.
*   The links should snap together with a bit of force but still hold together.
*  For the type-T link, the "round part" on one of the axles needs to be able to accept a normal type-B link connection. It's not going to be a standard axle connection (it should have slots to limit the motion).

I am not looking for the AI to improve on this design, but to create all of this from scratch using my requested parameters. I would also appreciate it if you could generate all the code into a single .scad file.

Let me know if you have any questions.

[Assistant]
missing-link.scad:
```
// Missling Link provided by Stellar Innovation
// http://www.thingiverse.com/stellarinnovation/about
// under Creative Commons License, Attribution (BY)

// Diameter of the axle
axleDiameter = 4; // [1:0.5:10]

// Thickness of various walls
wallThickness = 2; // [1:0.5:5]

// Clearance between moving parts
clearance = 0.3; // [0.1:0.05:0.5]

// part to print
partToPrint = 1; // [1:type-A (link with axle), 2: type-B (link with bushing), 3: type-C (center link), 4: type-M (magnet lock), 5: type-P (pocket), 6: type-T (transformation link)]

// Width of link at the center
centerLinkWidth = 4; // [1:0.5:10]

// Width of all other links
otherLinkWidth = 4; // [1:0.5:10]

// Number of links on each side of the center
numLinksOnEachSide = 2; // [1:4];

// Longer links
extraLength = 0; // [0:25]

// Depth of pocket (type-P links)
pocketDepth = 2.5; // [0:0.5:20]

// Magnet diameter (type-M links)
magnetDiameter = 4; // [1:0.1:25]

// Magnet length
magnetLength = 6; // [1:0.1:25]

// Top stop angle (90 = no stop block)
topStopAngle = 90; // [0:90]

// Bottom stop angle (90 = no stop block)
bottomStopAngle = 90; // [0:90]

outerDiameter = axleDiameter + 2*wallThickness;

if (partToPrint==1)
  TypeALink(centerLinkWidth, otherLinkWidth, numLinksOnEachSide, outerDiameter, axleDiameter, extraLength, clearance, topStopAngle);
else if (partToPrint==2)
  TypeBLink(otherLinkWidth, outerDiameter, axleDiameter, extraLength, clearance, topStopAngle, bottomStopAngle);
else if (partToPrint==3)
  TypeBLink(centerLinkWidth, outerDiameter, axleDiameter, extraLength, clearance, topStopAngle, bottomStopAngle);
else if (partToPrint==4)
  TypeMLink(centerLinkWidth, otherLinkWidth, numLinksOnEachSide, outerDiameter, axleDiameter, magnetDiameter, magnetLength, extraLength, wallThickness, clearance, topStopAngle);
else if (partToPrint==5)
  TypePLink(centerLinkWidth, otherLinkWidth, numLinksOnEachSide, outerDiameter, axleDiameter, extraLength, pocketDepth, wallThickness, clearance, topStopAngle);
else if (partToPrint==6)
  TypeTLink(centerLinkWidth, otherLinkWidth, numLinksOnEachSide, outerDiameter, axleDiameter, extraLength, clearance, topStopAngle);

// Link with axle (type-A)

module TypeALink(centerLinkWidth,
                    otherLinkWidth,
                    numLinksOnEachSide,
                    outerDiameter,
                    axleDiameter,
                    extraLength = 0,
                    clearance = 0,
                    topStopAngle = 90) {

  HalfALinkWithAxle(centerLinkWidth, otherLinkWidth, numLinksOnEachSide, outerDiameter, axleDiameter, 0.5*extraLength, clearance, topStopAngle);
  mirror([1, 0, 0])
    HalfALinkWithAxle(centerLinkWidth, otherLinkWidth, numLinksOnEachSide, outerDiameter, axleDiameter, 0.5*extraLength, clearance, topStopAngle);
}

// Link with bushing (type-B)

module TypeBLink(linkWidth,
                 outerDiameter,
                 axleDiameter,
                 extraLength = 0,
                 clearance = 0,
                 topStopAngle = 90,
                 bottomStopAngle = 90) {
  linear_extrude(height=linkWidth-clearance) {
    HalfALink(outerDiameter = outerDiameter,
               axleDiameter = axleDiameter,
               openingGap = 0.5*axleDiameter,
               extraLength = 0.5*extraLength,
               clearance = clearance,
               topStopAngle = topStopAngle,
               bottomStopAngle = bottomStopAngle);
    mirror([1, 0, 0])
      HalfALink(outerDiameter = outerDiameter,
                 axleDiameter = axleDiameter,
                 openingGap = 0.5*axleDiameter,
                 extraLength = 0.5*extraLength,
                 clearance = clearance,
                 topStopAngle = topStopAngle,
                 bottomStopAngle = bottomStopAngle);
  }
}

// Link with magnet lock (type-M)

module TypeMLink(centerLinkWidth,
                    otherLinkWidth,
                    numLinksOnEachSide,
                    outerDiameter,
                    axleDiameter,
                    magnetDiameter,
                    magnetLength,
                    extraLength,
                    wall,
                    clearance = 0,
                    topStopAngle = 90) {
  totalWidth = centerLinkWidth + 2*numLinksOnEachSide*otherLinkWidth - clearance;
  r1 = 0.5*(axleDiameter - clearance);
  z1 = sqrt(0.75)*r1;
  r2 = 0.5*outerDiameter;
  z2 = sqrt(3)*r2;
  height = z1+z2-r2-0.5*clearance;
  length = wall + magnetLength + extraLength;

  mirror([1, 0, 0])
    HalfALinkWithAxle(centerLinkWidth, otherLinkWidth, numLinksOnEachSide, outerDiameter, axleDiameter, 0, clearance, topStopAngle);

  difference() {
    union() {
      translate([0, -0.5*totalWidth])
        cube([length, totalWidth, height]);
      translate([wall+extraLength, 0, 0.5*magnetDiameter+wall])
        rotate([0, 90])
          cylinder(d=magnetDiameter+2*wall, h=magnetLength, $fn=60);
    }

    // hole for magnet
    translate([wall+extraLength, 0, 0.5*magnetDiameter+wall])
        rotate([0, 90])
          cylinder(d=magnetDiameter, h=magnetLength, $fn=60);

    // clearance for type-B links
    intersection() {
      translate([-0.5*outerDiameter, 0, z1])
        rotate([90, 0])
          cylinder(d=outerDiameter+clearance, h=totalWidth, center=true, $fn=48);
      SlotsForTypeBLinks(centerLinkWidth, otherLinkWidth, numLinksOnEachSide, outerDiameter, 0, clearance);
    }
  }
}
// Link with pocket (type-P)

module TypePLink(centerLinkWidth,
                 otherLinkWidth,
                 numLinksOnEachSide,
                 outerDiameter,
                 axleDiameter,
                 extraLength,
                 pocketDepth,
                 wall,
                 clearance = 0,
                 topStopAngle = 90) {
  totalWidth = centerLinkWidth + 2*numLinksOnEachSide*otherLinkWidth - clearance;
  r1 = 0.5*(axleDiameter - clearance);
  z1 = sqrt(0.75)*r1;
  r2 = 0.5*outerDiameter;
  z2 = sqrt(3)*r2;
  height = z1+z2-r2-0.5*clearance;
  pocketWidth = totalWidth - 2*wall;
  pocketLength = extraLength - 2*wall;

  // Pocket
  difference() {
    union() {
      TypeALink(centerLinkWidth, otherLinkWidth, numLinksOnEachSide, outerDiameter, axleDiameter, extraLength, clearance, topStopAngle);

      if (extraLength>2*clearance)
          rotate([90, 0])
            linear_extrude(height=totalWidth, center=true) {
                TypePSideView(outerDiameter, axleDiameter, 0.5*extraLength, wall, clearance);
                mirror([1, 0])
                  TypePSideView(outerDiameter, axleDiameter, 0.5*extraLength, wall, clearance);
            }
    }

    if (pocketDepth>0 && pocketWidth>0 && pocketLength>0)
      translate([0, 0, height-pocketDepth])
        Pocket(pocketLength, pocketWidth, pocketDepth, 1);
  }
}

// Transformation link (type-T) has space for a single, wide, link on one of the axles
// and any given number of links on the other axle.

module TypeTLink(centerLinkWidth,
                 otherLinkWidth,
                 numLinksOnEachSide,
                 outerDiameter,
                 axleDiameter,
                 extraLength=0,
                 clearance = 0,
                 topStopAngle = 90) {
  transformedLinkWidth = 2*(numLinksOnEachSide-1)*otherLinkWidth + centerLinkWidth;
  TypeALink(transformedLinkWidth, otherLinkWidth, 1, outerDiameter, axleDiameter, extraLength, clearance, topStopAngle);

  // Use entirely round parts on the left axis
  totalWidth = centerLinkWidth + 2*numLinksOnEachSide*otherLinkWidth - clearance;
  r = 0.5*(axleDiameter - clearance);
  z1 = sqrt(0.75)*r;
  translate([-0.5*(outerDiameter + extraLength), 0]) {
    difference() {
      // the "round part"
      translate([0, 0, z1])
        rotate([90, 0])
          cylinder(d=outerDiameter-clearance, h=totalWidth, center=true, $fn=48);

      // remove slots for the type-B links
      translate([-0.5*outerDiameter, 0])
        SlotsForTypeBLinks(centerLinkWidth, otherLinkWidth, numLinksOnEachSide, outerDiameter, extraLength, clearance);

      // remove sub-zero part
      translate([-0.5*outerDiameter, -0.5*totalWidth, -outerDiameter])
        cube([outerDiameter, totalWidth, outerDiameter]);
    }

    axleWidth = 0.5*(axleDiameter-clearance);
    AxleWithBumps(centerLinkWidth, otherLinkWidth, numLinksOnEachSide,
                     axleDiameter, axleWidth, totalWidth, clearance);
  }
}

// (Right) half a type-A link. Left side is the mirror image.

module HalfALinkWithAxle(centerLinkWidth,
                         otherLinkWidth,
                         numLinksOnEachSide,
                         outerDiameter,
                         axleDiameter,
                         extraLength=0,
                         clearance = 0,
                         topStopAngle = 90) {
  totalWidth = centerLinkWidth + 2*numLinksOnEachSide*otherLinkWidth - clearance;

  difference() {
    // extruded type-A link
    rotate([90, 0])
      linear_extrude(height=totalWidth, center=true)
        TypeASideView(outerDiameter=outerDiameter,
                        axleDiameter=axleDiameter,
                        extraLength=extraLength,
                        clearance=clearance,
                        topStopAngle=topStopAngle);

    // Remove slots for the type-B links
    SlotsForTypeBLinks(centerLinkWidth, otherLinkWidth, numLinksOnEachSide, outerDiameter, extraLength, clearance);
  }

  // Axle
  axleWidth = 0.5*(axleDiameter-clearance);
  translate([0.5*outerDiameter + extraLength, 0])
    AxleWithBumps(centerLinkWidth, otherLinkWidth, numLinksOnEachSide,
                     axleDiameter, axleWidth, totalWidth, clearance);
}

// Cuts out slots for the type-B links in one half of a type-A link.

module SlotsForTypeBLinks(centerLinkWidth, otherLinkWidth, numLinksOnEachSide, outerDiameter, extraLength=0, clearance=0) {
    totalWidth = centerLinkWidth + 2*numLinksOnEachSide*otherLinkWidth - clearance;
    // Possible cut-out for center link
    if (numLinksOnEachSide % 2 == 1)
      translate([0, -0.5*(centerLinkWidth+clearance)])
        cube([outerDiameter+extraLength, centerLinkWidth+clearance, outerDiameter]);

    // Cut-out for "other links"
    for (n=[1:2:numLinksOnEachSide-1], s=[+1,-1]) {
      y = 0.5*(totalWidth + clearance) - (n+0.5)*otherLinkWidth;
      translate([0, s*y - 0.5*(otherLinkWidth + clearance)])
        cube([outerDiameter+extraLength, otherLinkWidth+clearance, outerDiameter]);
    }
}

// The axles has "bumps" that prevents type-B links to fall off

module AxleWithBumps(centerLinkWidth,
                     otherLinkWidth,
                     numLinksOnEachSide,
                     diameter,
                     width,
                     length,
                     clearance=0) {
  length = centerLinkWidth + 2*numLinksOnEachSide*otherLinkWidth - clearance;

  Axle(diameter, width, length, clearance);

  // "bumps"
  bump = 0.8;
  for (n=[1:2:numLinksOnEachSide-1], s=[+1,-1]) {
    y = 0.5*(length + clearance) - (n+0.5)*otherLinkWidth;
    translate([0, s*y])
      Axle(diameter, width+2*bump, bump, clearance);
  }

  // if center link is cut out, then place a "bump" there too
  if (numLinksOnEachSide % 2 == 1) {
    Axle(diameter, width+2*bump, bump, clearance);
  }
}

// The axle is extruded from the Axle cross-view
//
// diameter    axle diameter (plus clearance)
// width       width of axle at bottom (<diameter)
// length      length of extruded axle
// clerance    distance between moving parts

module Axle(diameter, width, length, clearance=0) {
  rotate([90, 0])
   linear_extrude(height=length, center=true)
     AxleCrossView(diameter, width, clearance);
}

// The axle lies flat when printed, but it is rounded at the top
//
// diameter    axle diameter (plus clearance)
// width       width of axle at bottom (<diameter)
// clerance    distance between moving parts

module AxleCrossView(diameter, width, clearance=0) {
  r = 0.5*(diameter - clearance);
  x1 = 0.5*width;
  y1 = sqrt(0.75)*r;

  intersection() {
    translate([0, y1])
      circle(r=r, $fn=36);
    translate([-x1, 0])
      square([width, y1+r]);
  }
}

// The pocket has round corners
//
// length  length of pocket (x-coordinate)
// width   width of pocket (y-coordinate)
// depth   depth of pocket (z-coordinate)
// radius  corner radius

module Pocket(length, width, depth, radius) {
  r = (radius>0 && width>=2*radius && length>=2*radius)? radius : 0;

  if (r>0)
     for (j=[-0.5, +0.5], k=[-0.5,+0.5])
       translate([j*(length-2*r), k*(width-2*r)])
         cylinder(r=r, h=depth, $fn=16);
  translate([-0.5*length, -0.5*width+r])
    cube([length, width-2*r, depth]);
  translate([-0.5*length+r, -0.5*width])
    cube([length-2*r, width, depth]);
}

// Type-P links are constructed from type-A parts with extra length in the middle of the link,
// where a pocket is cut out. This is the part from which the pocket is cut out (side view).
//
// outerDiameter       Diameter of the link (plus clearance)
// axleDiameter        Diameter of the axle (plus clearance)
// extraLength         Length of this part
// wall                Thickness of walls around the pocket
// clearance           Distance between moving parts

module TypePSideView(outerDiameter,
                         axleDiameter,
                         extraLength,
                         wall,
                         clearance = 0) {
  r0 = 0.5*(outerDiameter - clearance);
  r1 = 0.5*(axleDiameter - clearance);
  z1 = sqrt(0.75)*r1;
  r2 = 0.5*outerDiameter;
  z2 = sqrt(3)*r2;
  height = z1+z2-r2-0.5*clearance;

  difference() {
    union() {
      square([extraLength+wall, height]);
      translate([extraLength, 0])
        square([wall, z2]);
    }

    translate([extraLength, z1+z2])
      circle(d=outerDiameter+clearance, $fn=48);
    translate([0.5*outerDiameter+extraLength, z1])
      circle(d=outerDiameter+clearance, $fn=48);
  }
}

// Half a type-A link viewed from the side
//
// outerDiameter       Diameter of the link (plus clearance)
// axleDiameter        Diameter of the axle (plus clearance)
// openingGap          Specifies the width of a possible opening gap (less clearance)
// extraLength         Makes the links longer
// clearance           Distance between moving parts
// topStopAngle        Angle of top stop block

module TypeASideView(outerDiameter,
                         axleDiameter,
                         extraLength = 0,
                         clearance = 0,
                         topStopAngle = 90) {
  r = 0.5*(axleDiameter - clearance);
  y1 = sqrt(0.75)*r;

  difference() {
    translate([0, y1])
      HalfALink(outerDiameter=outerDiameter,
                 extraLength=extraLength,
                 clearance=clearance,
                 flatBottom=true,
                 topStopAngle=topStopAngle);
    translate([0, -outerDiameter])
      square([outerDiameter+extraLength, outerDiameter]);
  }
}

// Half a Link is the right half of a (Type-A or B) link. It can also be combined with other parts.
//
// outerDiameter       Diameter of the link (plus clearance)
// axleDiameter        A positive value for a bushing with a hole for the axle (i.e type-B link)
// openingGap          Specifies the width of a possible opening gap (less clearance)
// extraLength         Makes the links longer
// clearance           Distance between moving parts
// flatBottom
// topStopAngle        Angle of top stop block
// bottomStopAngle     Angle of bottom stop block

module HalfALink(outerDiameter,
                 axleDiameter=0,
                 openingGap=0,
                 extraLength = 0,
                 clearance = 0,
                 flatBottom = false,
                 topStopAngle = 90,
                 bottomStopAngle = 90) {
  x0 = 0.5*outerDiameter + extraLength;
  D1 = outerDiameter - clearance;

  difference() {
    union() {
      translate([x0, 0]) {
        circle(d=D1, $fn=48);
        // stop angles (90 degrees=no stop)
        StopBlock(D1, topStopAngle);
        mirror([0,1])
          StopBlock(D1, bottomStopAngle);
      }

      // connection between link halves
      y_t = 0.25*sqrt(3)*D1;
      y0 = flatBottom? -0.5*D1 : -y_t;
      translate([0, y0])
        square([x0, y_t-y0]);
    }

    // axle and opening
    translate([x0, 0]) {
      if (axleDiameter > 0)
        circle(d=axleDiameter+clearance, $fn=36);
      if (openingGap > 0) {
        HalfAnOpening(openingGap, outerDiameter, axleDiameter, topStopAngle, clearance);
        mirror([0, 1])
          HalfAnOpening(openingGap, outerDiameter, axleDiameter, bottomStopAngle, clearance);
      }
    }

    // Narrow mid part
    D2 = outerDiameter + clearance;
    y2 = 0.5*sqrt(3)*outerDiameter;
    translate([extraLength, y2])
      circle(d=D2, $fn=48);
    translate([0, y2-0.5*D2])
      square([extraLength, D2]);

    if (!flatBottom) {
      translate([extraLength, -y2])
        circle(d=D2, $fn=48);
      translate([0, -y2])
      square([extraLength, 0.5*D2]);
    }
  }
}

// The stop block limits the rotation of the links
//
// diameter        diameter of link
// stopAngle       angle (CCW rotation) of stop block

module StopBlock(diameter, stopAngle) {
  r = 0.5*diameter;

  intersection() {
    square([r, r]);
    rotate(stopAngle)
      square([r,r]);
  }
}

// Half an opening is the upper half of the opening of a type-B (bushing) link
//
// opening gap     width of opening (less clearance), half of which is in the upper half (this part)
// axleDiameter    (less clearance)
// stopAngle       angle of stop block (90 degrees=no stop block)
// clearance       distance between moving parts (e.g. axle and bushing)

module HalfAnOpening(openingGap,
                        outerDiameter,
                        axleDiameter,
                        stopAngle = 90,
                        clearance = 0) {
    // bushing for axle
  R = 0.5*(outerDiameter - clearance);
  w = 0.5*(outerDiameter - axleDiameter) - clearance;

  // opening
  y0 = 0.5*openingGap + 0.5*clearance;
  // fancy fillet/radius
  r = 0.5*w;
  Rmid = R - r;
  y1 = y0+r;
  y_t = R*sin(stopAngle);
  // touches outer perimeter or stop block?
  x1 = (y_t < y1)? (Rmid-y1*sin(stopAngle))/cos(stopAngle) : sqrt(Rmid*Rmid-y1*y1);
  x2 = 1.5*R;
  y2 = (y_t < y1)? y1 + (x2-x1)*tan(stopAngle) : y1*x2/x1;
  difference() {
    polygon([[0, 0], [0, y0], [x1, y0], [x1,y1], [x2,y2], [x2, 0]]);
    translate([x1, y1])
      circle(r=r, $fn=24);
  }
}

```


[User]
I'd like a customizable bottle opener design, something like a flat, tapered shape with a coin slot, a keyring hole, and options for text and image embossing. I want to be able to adjust pretty much every dimension.

Here's what I'm thinking for the core functionality:

*   **Basic Shape:** It should be a rounded trapezoid, where I can control the length, base width, top width (which is based on the angle of the sides), and overall thickness. I need control over the radii of the rounded corners too. I'd like to be able to choose an angle that's more rectangular if I want more space on the opener. And I want the main body to be inset from the edge, kind of a bevel.

*   **Coin Slot:**  I need a slot for a coin, with adjustable radius, thickness, and overhang (how much bigger the hole around the coin is), and coin type options for US, Canadian, EU, and UK coins.  I also want a manual option to specify all three of those dimensions.

*  **Keyring Hole:** A key ring slot with adjustable width, height and inset.

*   **Text:** I want to add text to the surface, with controls for the text string, height, depth, horizontal and vertical offset from the coin slot. I need control over letter spacing, and the font to use.

*   **Image:** I want to emboss an image onto the surface too, from a PNG. I need control over the image's height, width, and offset.

*   **Layout:** I need options to generate an array of these on a build plate, specifying the number of rows and columns, and the spacing between the openers in each direction. It'd be great to use the "utils/build_plate.scad" library to generate a build plate for display only. I'd also need options for standard build plates, and to be able to specify manual dimensions.

*   **Tapering:** I'd like the body of the opener to have a main thickness and then taper down to a center thickness.

For the file structure, I'm thinking one main SCAD file that calls different modules within itself.  I'd also like the `utils/build_plate.scad` library to be included. I think that covers everything!

[Assistant]
PennyOpener_v1.1.scad:
```
use <utils/build_plate.scad>
/***************************************************************************************
 * Tapered pocket coin-op by Brett Beauregard (br3ttb)
 * Modified by mphardy for easier customization
 * Version 1.1 Modified by ALittleSlow
 --------------------------------------
 * Added image customization
 * Eliminated some non-manifold surfaces
 * Made build plate optional
 * Made trapezoid angle adjustable to fit more text or larger images
 * Converted from obsolete write() to text()
 *
 * Notes:
 * -  with the non-tapered pocket coin-op I tested changing all the input variables.  I'm pretty confident in the
 *    geometry now, so I don't think people will need to adjust very much.  I did test the coin and thickness
 *    variables though, as those may actually be modified.
 *
 * - if you adjust the coin size you may get an error when trying to export the stl.  this is likely due to an
 *   intersection between the coin hole and the key ring slot.  you can either adjust the slot dimensions or
 *   the coin overhang to correct this
 ***************************************************************************************/

/* Licenses
 * OpenSCAD_surface_example_input_image.png licensed by CC-BY-SA 3.0
 */

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

/* [Text] */
// The text to use
Text="Text";
// Size of letters
TextHieght=90; // [20 : 170]
// Depth/hieght of text (0=no text)
TextRelief=-10; // [-10 : 20]
// Text offset from slot
TextPositionX=-30; // [-120 : 0]
// Left/right text position
TextPositionY=0; // [-120 : 120]
// Spacing between letters
TextSpacing=10; // [6 : 20]
// The fontface to use. See https://en.wikibooks.org/wiki/OpenSCAD_User_Manual/Text
Font = "";
/* [Image] */
// 100 x 100 PNG image to convert to height map. Blank for no image. Doesn't work on Thingiverse, sorry.
image="OpenSCAD_surface_example_input_image.png"; // [image_surface:100x100]
// max height of image
image_height=0.9;
// image width. 0 for automatic
image_width=0; // [0:0.5:50]
// move image up or down
ImageOffsetX=0; //[-10:0.5:10]

/* [Coin] */
// Type of coin to use
CoinType = "US"; // [US:US 1 Cent, CA:CA 1 Cent, EU:EU 5 Cent, UK:UK 1 Penny, XX:Manual]
// Manual coin radius
ManualRadius=9.5;
// Manual coin thickness
ManualThickness=1.75;
// Manual coin overhang
ManualOverhang=3;

/* [Opener Shape] */
// Width of the key ring end
base=22;
// angle of the key ring corner
corner_angle=103.5; // [90.0:0.5:106]

/* [Plate] */
//for display only, doesn't contribute to final object
build_plate_selector = -1; //[-1:None,0:Replicator 2,1: Replicator,2:Thingomatic,3:Manual]
//manual x-dimensino
build_plate_manual_x = 100; //[`100:400]
//manual y-dimension
build_plate_manual_y = 100; //[100:400]
// Number of rows
NumberOfRows=1; // [1 : 6]
// Gap between rows
RowSpacing=0; // [0 : 10]
// Number of columns
NumberOfColumns=1; // [1 : 6]
// Gap between columns
ColumnSpacing=0; // [0 : 10]

/* [Hidden] */
spacing = TextSpacing / 10;
xpos = TextPositionX / 10;
ypos = TextPositionY / 10;
relief = TextRelief / 10;
hieght = TextHieght / 10;

//Thickness / Taper
thickness=6;
inset=1.75;
centerthickness=2.5;

//Overall Opener Configuration
length=50;
baseR1=5;
baseR2=5;
angle=corner_angle-90;

//Hole Configuration
holeBaseLoc=25.5;
holeLength=19.5;
// calculate base minimum base width to get 30 mm at the top
//extra=sin(angle)*holeLength
holeTopWidthMinimum=30; //=holeBaseWidth+2*extra
holeBaseWidth=max(23, holeTopWidthMinimum-2*holeLength*sin(angle));
holeR1=2;
holeR2=6;

//KeyRingSlot
slotWidth=17;
slotHeight=5;
slotInset=2.5;

rowoffset=35 + RowSpacing;
columnoffset=51 + ColumnSpacing;

$fs=1;

module placeImage() {
	imageWidth=(image_width==0) ? holeBaseWidth : image_width;
	translate([0, -length/6+ImageOffsetX, thickness+image_height])
//	intersection()
	{
		resize([imageWidth, 0,image_height], auto=true) surface(file=image, center=true, invert=true);
//		translate([0, 0, -image_height/2]) cube(size=[imageWidth, 100, image_height*2], center=true);
	}
}

module opener_row() {
  difference() {
    union() {
      rotate([0,0,90]) translate([-0.5*length, -0.5*base,0]) {
        if (CoinType=="US") {
		    opener(9.5, 1.75, 3);
        }
        if (CoinType=="CA") {
	  	    opener(9.5, 1.97, 3);
        }
  		  else if (CoinType=="EU") {
	 	    opener(9.4, 2.11, 3);
        }
		  else if (CoinType=="UK") {
		    opener(10.2, 2.07, 3);
        }
		  else if (CoinType=="XX") {
		    opener(ManualRadius, ManualThickness, ManualOverhang);
        }
	  }
	  if (relief>0)
		translate([ypos,xpos-(hieght/2),thickness+relief/2])
		linear_extrude(relief) text(text=Text, size=hieght, font=Font, halign="center", valign="center", spacing=spacing);

	}
    translate([0,-20,14.5]) rotate([90,90,0]) cylinder(r=12,h=6);
    if (relief<0) translate([ypos,xpos-(hieght/2),thickness+relief/2])
		linear_extrude(-relief) text(text=Text, size=hieght, font=Font, halign="center", valign="center", spacing=spacing);
  }
  if (image!="") placeImage();

}

module opener(coinRadius, coinThickness, coinOverhang) {
  difference() {
		// the body
		roundedInsetTrapezoid(length=length, r1=baseR1, r2=baseR2,mainthick=thickness,
					        baseW=base, angle=angle, inset=inset, centerthick=centerthickness);
		// over-thick holes to prevent non-manifold surfaces
		translate([holeBaseLoc,(base-holeBaseWidth)/2,-thickness/2])
			roundedTrapezoid(thick=thickness*2, baseW=holeBaseWidth, angle=angle, length=holeLength, r1=holeR1, r2=holeR2);
		translate([slotHeight/2+slotInset,(base-slotWidth+slotHeight)/2, -thickness/2]) cylinder(r=slotHeight/2, h=thickness*2);
		translate([slotHeight/2+slotInset,(base+slotWidth-slotHeight)/2, -thickness/2]) cylinder(r=slotHeight/2, h=thickness*2);
		translate([slotInset,(base-slotWidth+slotHeight)/2, -thickness/2])cube([slotHeight,slotWidth-slotHeight,thickness*2]);

		translate([holeBaseLoc-coinRadius+coinOverhang,base/2,(thickness-coinThickness)/2])
		{
			translate([0,-coinRadius,0])cube([coinRadius,2*coinRadius,coinThickness]);
			cylinder(r=coinRadius,h=coinThickness);
		}
	}
}

module roundedTrapezoid(thick=5, length=19.5, r1=2, r2=9.5, angle=13.5, baseW=23)
{
	x1 = length*sin(angle);
	difference()
	{
	trapezoidSolid(thick = thick, length = length, r1=r1, r2=r2, angle = angle, baseW=baseW);
		translate([length,-1*x1,0])cube([2*r2-length,baseW+2*x1,thick]);
		rotate([0,0,-1*angle])translate([0,-1*(r1+r2),0])cube([length,r1+r2, thick]);
		translate([0,baseW,0]) rotate([0,0,angle])cube([ length,r1+r2, thick]);
	}
}

module trapezoidSolid(thick=5, length=19.5, r1=1, r2=9.5, angle=13.5, baseW=23)
{
	r1oSet = length/cos(angle)-r1*tan((90+angle)/2);// -r1-r1*tan(angle);//-r1/cos(angle);
	sideoSet = r2*tan((90-angle)/2);// r2*(1- tan(angle));
	sidelen = r1oSet-sideoSet;
	bottomoSet = (length*sin(angle))-r1*tan((90+angle)/2);

	rotate([0,0,-1*angle])
	{
		translate([r1oSet,r1,0])cylinder(h=thick, r=r1);
		translate([sideoSet,r2,0])cylinder(h=thick,r=r2);
		translate([sideoSet,0,0]) cube([sidelen,2*r1,thick]);
	}
	translate([0,baseW,0])rotate([0,0,angle])
	{
		translate([0,-2*r1,0])
		{
			translate([r1oSet,r1,0])cylinder(h=thick, r=r1);
			translate([sideoSet,-r2+2*r1,0])cylinder(h=thick,r=r2);
			translate([sideoSet,0,0]) cube([sidelen,2*r1,thick]);
		}
	}
	translate([0,sideoSet,0])cube([length,baseW-2*sideoSet,thick]);
	translate([r2,-bottomoSet,0])cube([length-r2,baseW+2*bottomoSet,thick]);
}

module MakerbotM(height, thickness)
{
	radius = height/5.5;
	translate([-1.25*radius,1.5*radius,0])
	{
		difference() {
			cylinder(r=radius,h = thickness, $fn=20);
			translate([0,-1*radius,0])cube([radius,radius,thickness]);
		}
		translate([2.5*radius,0,0])difference() {
			cylinder(r=radius,h = thickness, $fn=20);
			translate([-1*radius,-1*radius,0])cube([radius,radius,thickness]);
		}
		translate([-1*radius,0,0]) {
			translate([0,-3.5*radius,0])cube([radius,3.5*radius,thickness]);
			translate([radius/2,-3.5*radius,0])cylinder(r=radius/2,h=thickness, $fn=20);
		}
		translate([0.75*radius,0,0]) {
			translate([0,-3.5*radius,0])cube([radius,4.5*radius,thickness]);
			translate([radius/2,-3.5*radius,0])cylinder(r=radius/2,h=thickness, $fn=20);
		}
		translate([2.5*radius,0,0]) {
			translate([0,-3.5*radius,0])cube([radius,3.5*radius,thickness]);
			translate([radius/2,-3.5*radius,0])cylinder(r=radius/2,h=thickness, $fn=20);
		}
		cube([2.5*radius,radius,thickness]);
	}
}

module roundedInsetTrapezoid(mainthick=6, length=19.5, r1=2, r2=9.5, angle=13.5, baseW=23, inset =1.75, centerthick=2.5)
{
	thick = (mainthick-centerthick)/2;
	 topr1=r1-inset;
	topr2=r2-inset;
	x1 = length*sin(angle);
	r1oSet = length/cos(angle)-r1*tan((90+angle)/2);// -r1-r1*tan(angle);//-r1/cos(angle);
	sideoSet = r2*tan((90-angle)/2);// r2*(1- tan(angle));
	sidelen = r1oSet-sideoSet;
	bottomoSet = (length*sin(angle))-r1*tan((90+angle)/2);
	sideangle = atan(inset/thick);
	difference()
	{
		union(){
			translate([0,0,thick+centerthick])roundedInsetSolid(thick=thick, length=length, r1=r1, r2=r2, angle=angle, baseW=baseW, inset =inset);
			translate([0,0,thick])roundedInsetSolid(thick=centerthick, length=length, r1=r1, r2=r2, angle=angle, baseW=baseW, inset =0);
			translate([0,baseW,thick])rotate([180,0,0])
				roundedInsetSolid(thick=thick, length=length, r1=r1, r2=r2, angle=angle, baseW=baseW, inset =inset);
		}

		//top angles
		translate([0,0,thick+centerthick])
		{
			translate([0,baseW,0]) rotate([0,0,angle])rotate([sideangle,0,0])cube([ length,r1+r2, thick+r1]);
			rotate([0,0,-1*angle])translate([0,-1*(r1+r2),0])translate([0,(r1+r2),0])
				rotate([-1*sideangle,0,0])translate([0,-1*(r1+r2),0])cube([length,r1+r2, thick+r1]);
			rotate([0,sideangle,0])translate([-2*thick,0,0])cube([2*thick,baseW+2*length*tan(angle),2*thick]);
			translate([length,-1*length*tan(angle),0])rotate([0,-1*sideangle,0])cube([2*thick,baseW+2*length*tan(angle),2*thick]);
		}

		//side angles
		rotate([0,0,-1*angle]) translate([0,-1*(r1+r2), -mainthick/2])cube([length,r1+r2, mainthick*2]);
		translate([0,baseW, -mainthick/2]) rotate([0,0,angle])cube([ length,r1+r2, mainthick*2]);

		//bottom angles
		translate([0,baseW,thick])rotate([180,0,0])
		{
			translate([0,baseW,0]) rotate([0,0,angle])rotate([sideangle,0,0])cube([ length,r1+r2, thick+r1]);
			rotate([0,0,-1*angle])translate([0,-1*(r1+r2),0])translate([0,(r1+r2),0])rotate([-1*sideangle,0,0])
				translate([0,-1*(r1+r2),0])cube([length,r1+r2, thick+r1]);
			rotate([0,sideangle,0])translate([-2*thick,0,0])cube([2*thick,baseW+2*length*tan(angle),2*thick]);
			translate([length,-1*length*tan(angle),0])rotate([0,-1*sideangle,0])cube([2*thick,baseW+2*length*tan(angle),2*thick]);
		}

		//top bottom
		translate([0,-1*length*tan(angle),mainthick])cube([length,baseW+2*length*tan(angle),2*mainthick]);
		translate([0,-1*length*tan(angle),-2*mainthick])cube([length,baseW+2*length*tan(angle),2*mainthick]);
	}

}

module roundedInsetSolid(thick=2, length=19.5, r1=2, r2=9.5, angle=13.5, baseW=23, inset =1)
{
	 topr1=r1-inset;
	topr2=r2-inset;
	x1 = length*sin(angle);
	r1oSet = length/cos(angle)-r1*tan((90+angle)/2);// -r1-r1*tan(angle);//-r1/cos(angle);
	sideoSet = r2*tan((90-angle)/2);// r2*(1- tan(angle));
	sidelen = r1oSet-sideoSet;
	bottomoSet = (length*sin(angle))-r1*tan((90+angle)/2);
	sideangle = atan(inset/thick);
	rotate([0,0,-1*angle])
	{
		translate([r1oSet,r1,0])cylinder(h=thick, r1=r1, r2=topr1,$fn=20);
		translate([sideoSet,r2,0])cylinder(h=thick,r1=r2, r2=topr2,$fn=20);
		translate([sideoSet,0,0])rotate([-1*sideangle,0,0]) cube([sidelen,2*r1,thick+r1]);
	}
	translate([0,baseW,0])rotate([0,0,angle])
	{
		translate([0,-2*r1,0])
		{
			translate([r1oSet,r1,0])cylinder(h=thick, r1=r1, r2=topr1,$fn=20);
			translate([sideoSet,-r2+2*r1,0])cylinder(h=thick,r1=r2, r2=topr2,$fn=20);
			translate([sideoSet,0,0])translate([0,2*r1,0])rotate([sideangle,0,0])translate([0,-2*r1,0]) cube([sidelen,2*r1,thick+r1]);
		}
	}
	translate([0,sideoSet,0])cube([length,baseW-2*sideoSet,thick]);
	translate([r2,-bottomoSet,0])cube([length-r2,baseW+2*bottomoSet,thick]);
}

module main() {
	rotate([0,0,90])
	  translate([-((rowoffset*(NumberOfRows-1))/2),-((columnoffset*(NumberOfColumns-1))/2),0])
    for (column = [0 : NumberOfColumns-1])
      translate([0,column*columnoffset,0])
        for (row = [0 : NumberOfRows-1])
          translate([row*rowoffset,0,0])
            rotate([0,0,(row%2)*180])
              opener_row();
	if (build_plate_selector>=0) build_plate(build_plate_selector,build_plate_manual_x,build_plate_manual_y);
}

main();

```


[User]
Hi, I'm looking for help designing a parametric finger pen holder. I've seen a few designs online but I'd like one that's easily customizable based on finger and pen size.

Basically, the holder needs to have two circular openings – one for a finger and one for a pen. The size of each opening should be adjustable based on the measured circumferences, but the wall thicknesses for each opening should be fixed. The design also needs to include a connecting web between the two circles and a cut-out section from both circles, and a flat profile that gives the holder its vertical shape. I think it would also be great to have the option to adjust the height and width of the vertical flat part of the holder. The whole thing should be designed in millimeters.

Specifically, I'd need parameters for:

*   **finger\_perimeter:** The circumference of the finger opening (in mm).
*   **pen\_perimeter:** The circumference of the pen opening (in mm).
*   **finger\_wall:** The thickness of the wall for the finger opening (fixed at 2 mm).
*   **pen\_wall:** The thickness of the wall for the pen opening (fixed at 1.5 mm).
*   **overall\_height:** The total height of the holder.
*   **pen\_height:** The height of the pen holding part of the holder, which can be less than the overall height.
*  **bar**: The length of the separator between the finger and pen holes (could be a fraction of pen diameter).
*   **finger\_cut\_angle:** The angle of the cut-out from the finger opening in degrees.
*   **pen\_cut\_angle:** The angle of the cut-out from the pen opening in degrees.

The holder is intended to be vertical, resting on its "flat" profile with the finger hole above the pen hole. I'd need you to create an OpenSCAD file that includes all of these parameters so that I can easily adjust the holder's dimensions for different fingers and pens. I'd like it to be pretty smooth, so high `$fn` value would be great. I'm not looking for specific libraries to use - just that it would be a single .scad file. Thanks!

[Assistant]
Parametric_Finger_Pen_Holder_Vertical.scad:
```
// parametric finger pen holder, remix for MMC
// of their https://www.thingiverse.com/thing:2802074
// scruss - 2018-06
// *** All dimensions millimetres because of course they are ***

//CUSTOMIZER VARIABLES

// Measured finger circumference, mm
finger_perimeter = 60;
// Measured pen circumference, mm
pen_perimeter = 31.4;

// CUSTOMIZER VARIABLES END

module naff() { }       // to make Customizer look no further

// derived diameters
finger_d = finger_perimeter / PI;
pen_d = pen_perimeter / PI;

// fixed design parameters
$fn = 64;	            // OpenSCAD arc smoothness: fairly high
finger_wall = 2.0;		// wall thickness, finger side
pen_wall = 1.5;			// wall thickness, pen side
overall_height = 18;	// total height of holder
pen_height = 10;		// height of (shorter) pen holder
bar = 0.75 * pen_d;		// length of separator between finger and pen
pen_centre_x = bar + (pen_d + finger_d) / 2; // x-coord of centre of pen
finger_cut_angle = 50;	// angle cut out from finger side, degrees
pen_cut_angle = 60;		// angle cut out from pen side

// length - which we need for the side details - depends on
//  the segments we left out of the finger and pen side
overall_length = ((finger_d / 2) + finger_wall) * cos(finger_cut_angle / 2) + pen_centre_x + ((pen_d / 2) + pen_wall) * cos(pen_cut_angle / 2);
// model isn't symmetrical, so we need to calculate minimum
//  coord for correct placement
min_x = 0 - ((finger_d / 2) + finger_wall) * cos(finger_cut_angle / 2);

/*  sine rule fillet - scruss 2018-06
    circle radius r1, centre at origin
    circle radius r2, centre at [x, 0]
  requires
    fillet radius (x - r1)
    centre *polar* coords [ x, 2 * asin((r2 + x - r1) / (2 * x)) ]
*/
module sine_fillet(r1 = 20, r2 = 10, x = 40) {
    angle = 2 * asin((r2 + x - r1) / (2 * x));
    difference() {
        polygon([
            [0, 0],
            [x * cos(-angle), x * sin(-angle)],
            [x, 0],
            [x * cos(angle), x * sin(angle)]
        ]);
        union() {
            translate([x * cos(angle), x * sin(angle)]) {
                circle(r = x - r1, center = true);
            }
            translate([x * cos(-angle), x * sin(-angle)]) {
                circle(r = x - r1, center = true);
            }
        }
    }
}

// generate two circles with fillet web between them
module filleted_circles(r1 = 20, r2 = 10, x = 40) {
    union() {
        sine_fillet(r1, r2, x);
        circle(r = r1, center=true);
        translate([x, 0])circle(r = r2, center=true);
    }
}

// cut a triangular segment out of a circle origin 0,0
module segment(start_angle  = -30,
               end_angle    =  30,
               radius       =  10) {
    scale(radius)polygon([
                   [0,                 0],
                   [cos(start_angle),  sin(start_angle)],
                   [cos(end_angle),    sin(end_angle)]
    ]);
}

// 2D model of the finger and pen holes, XY plane
module plan_outline() {
    // positive then negative offset results in smoothed corners
    offset(r=0.5)offset(r=-0.5)difference() {
        filleted_circles((finger_d / 2) + finger_wall, (pen_d / 2) + pen_wall, pen_centre_x);
        // this union is the finger and pen holes
        union() {
            circle(d=finger_d, center=true);
            segment(180 - finger_cut_angle / 2, 180 + finger_cut_angle / 2, finger_d);
            translate([pen_centre_x, 0]) {
                circle(d=pen_d, center=true);
                segment(-pen_cut_angle / 2, pen_cut_angle / 2, pen_d);
            }
        }
    }
}

// 2D model of the vertical profile, XZ plane
module elevation_outline() {
    // again with the offset ... offset smoothing
    offset(r=2)offset(r=-2)translate([min_x, -overall_height / 2]) {
        difference() {
            // side profile is basically a rectangle ...
            square([overall_length, overall_height]);
            union() {
                // ... less a rounded relief out the TR corner for pen
                translate([finger_d + 2 * finger_wall + overall_height - pen_height, overall_height])hull() {
                    circle(r=overall_height - pen_height);
                    translate([finger_d, 0])circle(r=overall_height - pen_height);
                }
                // ... also less a rounded gap in the finger grip
                translate([-finger_d / 6, overall_height / 3])offset(r=1)offset(r=-1)square([finger_d, overall_height / 3]);
            }
        }
    }
}

// intersect extrusions of the 2D profiles at 90 degrees to make model
intersection() {
    linear_extrude(height=overall_height, center=true)plan_outline();
    rotate([90, 0, 0]) {
        linear_extrude(height=2 * overall_height, center=true)elevation_outline();
    }
}

```


[User]
Hey, I'm looking to create a parametric pyramid design in OpenSCAD, mainly for testing 3D printer settings like overhangs and stringing. I've got a basic idea in mind, but I need it to be flexible.

Essentially, I want a pyramid that's formed by a wireframe structure - think of it like connecting spheres with tubes. I'd need to be able to adjust things like:

*   **Base Length:** The length of one side of the square base.
*   **Pyramid Height:** The overall height of the pyramid.
*   **Tube Radius/Thickness:** The radius of the tubes (or "posts") that form the wireframe. I'd like all posts to have the same radius.
*   **Resolution:** The resolution/number of segments used in the spheres for smoothness.

The pyramid should be constructed from spheres at each corner (and one at the apex) connected by those cylindrical posts. I would like the pyramid to be hollow for calibration purposes.

Oh! One more thing. I also need the option to make the base of the pyramid *solid*, if desired. Maybe a boolean switch for this, with the default being hollow.

Could you generate the OpenSCAD code for this?  I don't have anything specific in mind for organization.  I can do that myself if needed, but please do whatever is most appropriate. Thank you!

[Assistant]
Parametric_Pyramid.scad:
```

Resolution=30; // Resoultion

Length=30; // Side Length of base

Height=34; // Height of base

Radius=2; // Radius of posts

/* Hidden */
r=Radius;

$fn=Resolution;

lng=Length-r-r;

// Customizable Square Pyramid wireframe by skitcher

module sphere1(){
    sphere(r);
}

module sphere2(){
    translate([lng,0,0]) sphere(r);
}

module sphere3(){
    translate([lng,lng,0]) sphere(r);
}

module sphere4(){
    translate([0,lng,0]) sphere(r);
}

module sphere5(){
    translate([lng/2,lng/2,Height-r]) sphere(r);
}

// HULL //

//base
hull(){
    sphere1();
    sphere2();
}

hull(){
    sphere2();
    sphere3();
}

hull(){
    sphere3();
    sphere4();
}

hull(){
    sphere4();
    sphere1();
}

//top
hull(){
    sphere1();
    sphere5();
}

hull(){
    sphere2();
    sphere5();
}

hull(){
    sphere3();
    sphere5();
}

hull(){
    sphere4();
    sphere5();
}

// END //

```


[User]
I need a parametric battery box generator for AA batteries. It should let me specify how many cells I want, and whether or not to include mounting holes.

The box should have rounded edges, and include cutouts for springs and solder flanges for the contacts, and also cutouts for the wires. It should also have polarity markings. I'd also like cutouts on the bottom for wire routing and for connecting multiple cells, if there's more than one. Finally, there should be a cutout on top to make it easier to remove the batteries, and the end plates should have rounded corners too.

For the core design, let's go with the following parameters: the battery compartment should be 50mm long, and the diameter of each battery holder should be 15mm. The main box should be 10mm high with endplates 20mm high. The spring cutouts should be 1mm wide, and the solder flange cutouts should be 7mm wide. The bottom wire cutouts should be 2.6mm deep, and the mounting holes, if enabled should be 3.3mm diameter. The end plate corners should be rounded using a 4mm radius and the end plate to battery cradle interface should be rounded using a 3mm radius. The polarity markings should be 4mm tall, and I think 6x2 rectangles and 2x6 rectangles should work well. I think a flange thickness of 3mm and a width of 4mm should be good for the mounting holes.

I'm not particular about which library you use to generate the rounded corners. I would prefer not to have any code in the file that uses non-standard libraries though.

[Assistant]
battery_box.scad:
```
/*
 * Variables for Thingiverse Customizer
 * ==================================================================
 *
 */

// The number of AA cells in your battery holder
Cell_Count = 1;

// Mounting holes needed or not
Mounting_Holes = "yes";//[yes,no]

/*
 * Library function: edge
 * ==================================================================
 *
 * Used to make roundes edges on objects
 *
 */
module edge(radius, height)
{
	difference()
	{
		translate([radius/2-0.5, radius/2-0.5, 0])
			cube([radius+1, radius+1, height], center = true);

		translate([radius, radius, 0])
			cylinder(h = height+1, r1 = radius, r2 = radius, center = true, $fn = 100);
	}
}

module battery_box(cells,mounting_holes)
{
	difference()
	{
		union()
		{
			translate([0, 0, 10/2])
				cube(size=[50+8+8, 15*cells, 10], center=true);

			translate([50/2+7+2/2, 0, 20/2])
				cube(size=[2, 15*cells, 20], center=true);

			translate([-(50/2+7+2/2), 0, 20/2])
				cube(size=[2, 15*cells, 20], center=true);

			translate([-(50/2+7-3/2), 0, 11.5/2+10/2])
				cube(size=[3, 15*cells, 11.5], center=true);

			translate([(50/2+7-3/2), 0, 11.5/2+10/2])
				cube(size=[3, 15*cells, 11.5], center=true);

			// mounting flanges
            if (mounting_holes=="yes")
            {
			translate([20, cells*15/2+4/2, 3/2])
				cube(size=[7, 4, 3], center=true);

			translate([20, cells*15/2+4, 3/2])
				cylinder(r=7/2, h=3, center=true, $fn = 60);

			translate([-20, cells*15/2+4/2, 3/2])
				cube(size=[7, 4, 3], center=true);

			translate([-20, cells*15/2+4, 3/2])
				cylinder(r=7/2, h=3, center=true, $fn = 60);

			translate([20, -(cells*15/2+4/2), 3/2])
				cube(size=[7, 4, 3], center=true);

			translate([20, -(cells*15/2+4), 3/2])
				cylinder(r=7/2, h=3, center=true, $fn = 60);

			translate([-20, -(cells*15/2+4/2), 3/2])
				cube(size=[7, 4, 3], center=true);

			translate([-20, -(cells*15/2+4), 3/2])
				cylinder(r=7/2, h=3, center=true, $fn = 60);
            }
		}

		for (i=[0:cells-1])
		{
			// battery cradle
			translate([0, -cells*15/2+15/2+15*i, 15/2+10/2])
			rotate(90, [0, 1, 0])
				cylinder(r=15/2, h=50+4+4, center=true, $fn = 100);

			// spring cut-out
			translate([50/2+7-1/2, -cells*15/2+15/2+15*i, 15/2+10/2])
				cube(size=[1, 5.5, 30], center=true);

			translate([50/2+7-1.4/2, -cells*15/2+15/2+15*i, 11.5/2+10/2])
				cube(size=[1.4, 10.5, 11.6], center=true);

			translate([-(50/2+7-1/2), -cells*15/2+15/2+15*i, 15/2+10/2])
				cube(size=[1, 5.5, 30], center=true);

			translate([-(50/2+7-1.4/2), -cells*15/2+15/2+15*i, 11.5/2+10/2])
				cube(size=[1.4, 10.5, 11.6], center=true);

			// solder flange cut-out
			translate([(50/2+7-7/2), -cells*15/2+15/2+15*i, 3/2])
				cube(size=[7, 5.5, 3.1], center=true);

			translate([(50/2), -cells*15/2+15/2+15*i, 3/2])
				cylinder(r=5.5/2, h=3.1, center=true, $fn = 50);

			translate([-(50/2+7-7/2), -cells*15/2+15/2+15*i, 3/2])
				cube(size=[7, 5.5, 3.1], center=true);

			translate([-(50/2), -cells*15/2+15/2+15*i, 3/2])
				cylinder(r=5.5/2, h=3.1, center=true, $fn = 50);

			// polarity marking (+)
			translate([20, -cells*15/2+15/2+15*i, 4/2+4.5])
				cube(size=[6, 2, 4], center=true);

			translate([20, -cells*15/2+15/2+15*i, 4/2+4.5])
				cube(size=[2, 6, 4], center=true);

			// polarity marking (-)
			translate([-20, -cells*15/2+15/2+15*i, 4/2+4.5])
				cube(size=[6, 2, 4], center=true);
		}

		if (cells>=2)
		{
			for (i=[0:cells-2])
			{
				// bottom cut-out for cell connections
				translate([0, -cells*15/2+15+15*i, 2.5/2])
				rotate(17, [0, 0, 1])
					cube(size=[50, 2, 2.6], center=true);
			}
		}

		// bottom cut-out for output wires
		translate([25/2, -cells*15/2+15/2+15*0, 2.5/2])
			cube(size=[25, 2, 2.6], center=true);

		translate([3/2, -cells*15/2+15/2+15*0+1, 2.5/2])
			edge(4, 2.6);

		translate([3/2, -cells*15/2+15/2+15*0-1, 2.5/2])
		rotate(-90, [0, 0, 1])
			edge(4, 2.6);

		translate([-25/2, -cells*15/2+15/2+15*(cells-1), 2.5/2])
			cube(size=[25, 2, 2.6], center=true);

		translate([-3/2, -cells*15/2+15/2+15*(cells-1)+1, 2.5/2])
		rotate(90, [0, 0, 1])
			edge(4, 2.6);

		translate([-3/2, -cells*15/2+15/2+15*(cells-1)-1, 2.5/2])
		rotate(180, [0, 0, 1])
			edge(4, 2.6);

		// bottom polarity marking (+)
		translate([7, -cells*15/2+15/2+15*0-4.5, 1.5/2])
			cube(size=[4, 1.5, 1.6], center=true);

		translate([7, -cells*15/2+15/2+15*0-4.5, 1.5/2])
			cube(size=[1.5, 4, 1.6], center=true);

		// bottom polarity marking (-)
		translate([-7, -cells*15/2+15/2+15*(cells-1)+4.5, 1.5/2])
			cube(size=[4, 1.5, 1.6], center=true);

		// mounting holes
		if (mounting_holes=="yes")
        {
        translate([20, cells*15/2+4, 3/2])
			cylinder(r=3.3/2, h=4, center=true, $fn = 30);

		translate([-20, cells*15/2+4, 3/2])
			cylinder(r=3.3/2, h=4, center=true, $fn = 30);

		translate([20, -(cells*15/2+4), 3/2])
			cylinder(r=3.3/2, h=4, center=true, $fn = 30);

		translate([-20, -(cells*15/2+4), 3/2])
			cylinder(r=3.3/2, h=4, center=true, $fn = 30);
        }
		// bottom cut-out for output wire
		translate([0, 0, 2.5/2])
			cube(size=[3, cells*15+5, 2.6], center=true);

		// cutout to ease battery removal
		translate([0, 0, 20/2+10/2])
		rotate(90, [1, 0, 0])
			cylinder(r=20/2, h=cells*15+5, center=true, $fn = 100);

		// rounded corners on end plates
		translate([0, -cells*15/2, 20])
		rotate(90, [0, 1, 0])
			edge(4, 50+8+8+5);

		translate([0, cells*15/2, 20])
		rotate(90, [0, 1, 0])
		rotate(-90, [0, 0, 1])
			edge(4, 50+8+8+5);

		translate([0, -cells*15/2, 16.5])
		rotate(90, [0, 1, 0])
			edge(3, 50+7+7);

		translate([0, cells*15/2, 16.5])
		rotate(90, [0, 1, 0])
		rotate(-90, [0, 0, 1])
			edge(3, 50+7+7);
	}
}

battery_box(Cell_Count,Mounting_Holes);
```