[User]
Hey there! I'm trying to make a little tool to help me mark the center of things. I've got a basic idea, but I'd like to make it parametric so I can adjust it easily.

Basically, I need a flat, cross-shaped piece with a circle in the middle. The cross will be made from two intersecting rectangles. I want to be able to control:

*   The overall width of the cross (call it `w`).
*   The thickness of the rectangles that make up the cross (call it `t`).
*   The height/thickness of the whole thing (call it `h`).
*   A small offset amount for the center circle, so that when I use a pen to mark the center the mark is the actual center and not the edge of the design. Call this `sharpie`.

I'd also like a final circle to be added in the center, which should mark the actual center of the cross.

I'm thinking I'd use OpenSCAD for this, and I'd like it to be a single, parametric file with all of those variables defined at the top.

To help make sure the code is easy to understand, would you also add in all of these helpful functions from a library I was using named `ShortCuts.scad`. It has all the common transformation functions, primitives, and logical functions. Basically, the library includes these functions/modules:

**Transformations:**

*   `T(x, y, z)`: Translate
*   `Tx(x)`: Translate on X
*   `Ty(y)`: Translate on Y
*   `Tz(z)`: Translate on Z
*   `R(x, y, z)`: Rotate
*   `Rx(x)`: Rotate around X
*   `Ry(y)`: Rotate around Y
*   `Rz(z)`: Rotate around Z
*   `S(x, y, z)`: Scale
*   `Sx(x)`: Scale on X
*   `Sy(y)`: Scale on Y
*   `Sz(z)`: Scale on Z

**Logical Operators:**

*   `D()`: Difference
*   `U()`: Union
*   (And the library code notes that an intersection is missing, but I believe it's possible to do using OpenSCAD directly).

**Primitives:**

*   `Ci(r)`: Circle
*   `CiH(r, w)`: Half Circle
*   `CiS(r, w1, w2)`: Circle Segment
*   `Sq(x, y, center)`: Square
*   `Cy(r, h, center)`: Cylinder
*    `Cu(x, y, z, center)`: Cube
*   `CyH(r, h, w, center)`: Cylinder Half
*   `CyS(r, h, w1, w2, center)`: Cylinder Segment
*   `Ri(R, r, h, center)`: Ring
*    `RiH(R, r, h, w, center)`: Ring Half
*   `RiS(R, r, h, w1, w2, center)`: Ring Segment
*   `Sp(r)`: Sphere
*    `SpH(r, w1, w2)`: Sphere Half
*    `SpS(r, w1, w2, w3)`: Sphere Segment
* `Pie(r, h, w1, w2, center)`: Cylinder segment

I'm also wondering if it's possible to generate the center mark as a very thin cylinder rather than just an outline (to make it easier to print). It doesn't need to actually be a cylinder; any similar geometry that would work well for an FDM printer should be fine.

Thanks!

[Assistant]
centerfinder.scad:
```
//use <sc.scad> needed to be included due to customizer not being able to import libs

h=5;
w=50;
t=5;
sharpie=0.1;

D(){intersection(){Cu(w+t,2*(w-t/2),h);U(){Tx(t/2)Cu(w,t,h);
T(w/2,w/2-t/2,0)Cu(t,w,h);
T(w/2,0,0)Rz(45)T(t/2+sharpie,w/2+2*t,0)Cu(t,sqrt(2)*w-t,h);}}
T(0,w/2,h/2)Cu(w,w,h);}

//========================================
// ShortCuts.scad
// Autor: Rudolf Huttary, Berlin 2015
//
$fn = 100;

//show_examples();

module show_examples()
	place_in_rect(30, 30)
	{
		Cy(h = 10);
		CyH(h = 10);
		CyH(h = 10, w = 30);
		CyS(h = 10);
		CyS(h = 10, w1 = 25, w2 = 75);
		Cu(10);
		Ri(h = 10);
		RiH(h = 10);
		RiS(h = 10, w1 = 10);
		RiS(h = 10, w1 = 30, w2 = 300);
		Sp();
		SpH(10, 30, 30);
	}

module help()
{
echo("===============");
echo("help(): shows this help");
echo("show_examples(): shows some examples");
echo("place_in_rect(): places children objects in grid");
echo("Transformations:");
echo(" transform :  T(x=0, y=0, z=0), Tx(x=0) , Ty(y=0), Tz(z=0)");
echo(" rotate :  R(x=0, y=0, z=0), Rx(x=0) , Ry(y=0), Rz(z=0)");
echo(" scale :  S(x=1, y=1, z=1), Sx(x=1) , Sy(y=1), Sz(z=1)");
echo("Logical");
echo(" difference :  D()");
echo(" union :  U()");
echo(" intersection : *missing*");
echo("Primitives");
echo(" circle :  Ci(r=10)");
echo(" circle_half :  CiH(r=10, w=0)")
echo(" circle_segment :  CiS(r=10, w1=0, w2=90)")
echo(" square :  Sq(x=10, y=0, center=true))");
echo(" cylinder :  Cy(r=10, h=1, center=true)");
echo(" cylinder_half :  CyH(r=10, w=0)")
echo(" cylinder_segment: CyS(r=10, h=1, w1=0, w2=90,center=true)");
echo(" cylinder_segment: Pie(r=10, h=1, w1=0, w2=90,center=true)");
echo(" cube :  Cu(x=10, y=0, z=10, center=true)");
echo(" ring :  Ri(R=10, r=5, h=1, center=true)");
echo(" ring_half :  RiH(R=10, r=5, h=1, w=0 center=true)");
echo(" ring_segment :  RiS(R=10, r=5, h=1, w1=0, w2=90, center=true)");
echo(" sphere:  Sp(r=10))");
echo(" sphere_half:  SpH(r=10, w1 = 0, w2 = 0))");
echo("===============");
}

// Euclidean Transformations

module T(x=0, y=0, z=0){translate([x, y, z])children(); }
module Tx(x) { translate([x, 0, 0])children(); }
module Ty(y) { translate([0, y, 0])children(); }
module Tz(z) { translate([0, 0, z])children(); }

module R(x=0, y=0, z=0){rotate([x, y, z]) children();}
module Rx(x=90){rotate([x, 0, 0]) children();}
module Ry(y=90){rotate([0, y, 0]) children();}
module Rz(z=90){rotate([0, 0, z]) children();}

module S(x=1, y=1, z=1){scale([x, y, z]) children();}
module Sx(x=1){scale([x, 1, 1]) children();}
module Sy(y=1){scale([1, y, 1]) children();}
module Sz(z=1){scale([1, 1, z]) children();}

module D() difference(){children(0); children([1:$children-1]);}
module U() children([0:$children-1]);
// module I() intersection()children([0:$children-1]); // does not work for some reason

// primitives - 2D

module Sq(x =10, y = 0, center = true)
{
   if(y==0)
		square([x, x], center = center);
	else
		square([x, y], center = center);
}
module Ci(r = 10)
{
	circle(r = r);
}

// derived primitives - 2d
module CiH(r = 10, w = 0)
  circle_half(r, w);

module CiS(r = 10, w1 = 0, w2 = 90)
  circle_segment(r, w1, w2);

// primitives - 3d
module Cy(r = 10, h = 1, center = true)
{
	cylinder(r = r, h = h, center = center);
}
module Cu(x = 10, y = 0, z = 10, center = true)
{
  if (y==0)
	cube([x, x, x], center = center);
  else
	cube([x, y, z], center = center);
}

// derived primitives - 3d
module CyH(r = 10, h = 1, w = 0, center = true)
  cylinder_half(r, h, w, center);

module CyS(r = 10, h = 1, w1 = 0, w2 = 90, center = true)
  cylinder_segment(r, h, w1, w2, center);

module Ri(R = 10, r = 5, h = 1, center = true)
  ring(R, r, h, center);

module RiS(R = 10, r = 5, h = 1, w1 = 0, w2 = 90, center = true)
   ring_segment(R, r, h, w1, w2, center);

module RiH(r1 = 10, r2, h = 1, w = 0, center = true)
   ring_half(r1, r2, h, w, center);
module Pie(r = 10, h = 1, w1 = 0, w2 = 90, center = true)
  cylinder_segment(r, h, w1, w2, center);
module Sp(r = 10)
  sphere(r);
module SpH(r = 10, w1 = 0, w2 = 0)
  sphere_half(r, w1, w2);
module SpS(r = 10, w1 = 0, w2 = 90, w3 = 90)
  sphere_segment(r, w1, w2);

// clear text definitions
module circle_half(r = 10, w = 0)
{
	difference()
	{
		circle(r);
     rotate([0, 0, w-90])
     translate([0, -r])
		square([r, 2*r], center = false);
	}
}

module circle_segment(r = 10, w1 = 0, w2 = 90)
{
  W2 = (w1>w2)?w2+360:w2;
  if (W2-w1 < 180)
    intersection()
		{
       circle_half(r, w1);
       circle_half(r, W2-180);
 		}
	else
    union()
		{
       circle_half(r, w1);
       circle_half(r, W2-180);
 		}
}

module cylinder_half(r = 10, h = 1, w = 0, center = true)
{
  linear_extrude(height = h, center = center)
  circle_half(r, w);
}

module cylinder_segment(r = 10, h = 1, w1 = 0, w2 = 90, center = true)
{
  linear_extrude(height = h, center = center)
  circle_segment(r, w1, w2);
}

module ring(R = 10, r = 5, h = 1, center = true)
{
	difference()
	{
	cylinder(r = R, h = h, center = center);
   translate([0, 0, -2*h])
	cylinder(r = r, h = 4*h, center = false);
	}
}

module ring_half(R = 10, r = 5, h = 1, w = 0, center = true)
{
	difference()
	{
		ring(R, r, h, center);
     rotate([0, 0, w])
     translate([0, -R/2, 0])
		cube([2*R, R, 3*h], center = true);
	}
}

module ring_segment(R = 10, r = 5, h = 1, w1 = 0, w2 = 90, center = true)
{
  W2 = (w1>w2)?w2+360:w2;
  if (W2-w1 < 180)
    intersection()
		{
       ring_half(R, r, h, w1, center);
       ring_half(R, r, h, W2-180, center);
 		}
	else
    union()
		{
       ring_half(R, r, h, w1, center);
       ring_half(R, r, h, W2-180, center);
 		}
}

module sphere_half(r = 10, w1 = 0, w2 = 0)
{
	difference()
	{
   	sphere(r);
      rotate([-w1, -w2, 0])
     	translate([0, 0, r])
		cube(2*r, 2*r, r, center = true);
	}

}

// additional code
module place_in_rect(dx =20, dy=20)
{
  cols = ceil(sqrt($children));
  rows = floor(sqrt($children));
  for(i = [0:$children-1])
	{
	  T(dx*(-cols/2+(i%cols)+.5), dy*(rows/2-floor(i/cols)-.5))
		 children(i);
	}
}

```


[User]
I'm looking for a parametric stand for my RICOH Theta camera, and I'd like to be able to customize its dimensions. I've got some basic ideas, and I'll describe what I'm looking for.

The stand should have a central shell that the camera sits inside, and four legs extending outward to provide stability. The central shell should be formed by taking the cross-section of the Theta camera's body, then extruding it vertically. I'd like to be able to specify the stand's height, the wall thickness of the shell, the spread of the legs, and a little bit of extra clearance between the shell and the camera, so it doesn't fit *too* tightly.

Specifically, I need the following parameters to be adjustable:

*   **`height`**: The overall height of the stand.
*   **`stand_thickness`**: The thickness of the shell walls and legs.
*   **`base_r`**:  The radial distance from the center of the camera to the tip of each leg. This will affect how wide the legs spread.
*   **`clearance`**: Additional space around the camera within the shell.

I'm assuming you know the basic dimensions of the RICOH Theta, but I'll include those, too, just to be sure:

*   **`tetha_r`**:  Radius of the camera's main body.
*   **`tetha_depth`**: Thickness of the camera.
*   **`tetha_width`**: Width of the camera.

The legs should be triangular with the wider end meeting the shell and the point ending at the base_r radius. There should also be cylinders connecting the legs to the stand to provide a smooth curve.

I'd like a single SCAD file to accomplish this, and I don't require any external libraries.

[Assistant]
theta_stand.scad:
```
// Stand for RICOH THETA SC

/* [Basic parameters] */

// Height of the stand
height = 20;          // [5:95]
// Wall thickness
stand_thickness = 1.6;  // 0.3
// Leg spread
base_r = 100;            // [50:200]
// additional clearance for inserting camera
clearance = 1.5;         // [0:5]

/* [Camera Dimensions] */

//Radius of the theta body
tetha_r = 75;
//Thickness of theta
tetha_depth = 18;
//Width of theta
tetha_width = 45;

module theta_profile(extra=0) {
    r = tetha_r;
    r_dist = tetha_depth + extra;
    w = tetha_width + extra;

    intersection() {
        translate([-r+r_dist/2,0,0])
        circle(r=r, $fn=180);

        translate([r-r_dist/2,0,0])
        circle(r=r, $fn=180);

        square([r_dist,w], center=true);
    }
}

module theta_body(extra=0, height=10) {
    linear_extrude(height=height) {
        theta_profile(extra=extra);
    }
}

module theta_shell(thickness=2, height=130, extra=0) {

    difference() {
        theta_body(extra=2*thickness+extra, height=height);

        translate([0,0,thickness])
        theta_body(extra=extra, height=height);
    }
}

module theta_mount_leg(height=20, len=20, thickness=2) {

    translate([0,-thickness/2,0])
    rotate([90,0,180])
    linear_extrude(height=thickness) {
        polygon(points=[[0,0],[0,height],[len,0]]);
    }

    translate([-len,0,0])
    cylinder(r=thickness*2, h=thickness);

}

module theta_stand(extra=0, height=20, thickness=2, base_r=70) {
    r_dist = tetha_depth+extra;
    w = tetha_width+extra;

    l1 = (base_r - r_dist) / 2 - 2*thickness - thickness;
    l2 = (base_r - w) / 2 - 2*thickness - thickness;

    theta_shell(height=height, thickness=thickness, extra=extra);

    translate([-r_dist/2-thickness,0,0])
    theta_mount_leg(height=height, len=l1);

    translate([r_dist/2+thickness,0,0])
    rotate([0,0,180])
    theta_mount_leg(height=height, len=l1);

    translate([0,-w/2-thickness,0])
    rotate([0,0,90])
    theta_mount_leg(height=height, len=l2);

    translate([0,w/2+thickness,0])
    rotate([0,0,-90])
    theta_mount_leg(height=height, len=l2);

}

theta_stand(extra=clearance, height=height, thickness=stand_thickness, base_r=base_r);

```


[User]
Hey, I'm looking to create a customizable robot similar to the Otto DIY robot, but I want the design to be fully parametric and generated with OpenSCAD.  I've got some rough requirements and ideas, and I was hoping you could help me generate the necessary OpenSCAD files.

First, the robot should be broken down into the following parts: a head, a body, two legs, and two feet (left and right). I need to be able to select which part I want to preview or print through a variable (like `part="all"` would show the whole assembled bot). I want to be able to specify different brain mounting options as well using a variable `brain_type`, including Arduino Nano with a servo shield, Arduino Nano with a proto board, Arduino Uno with a servo shield, or just the Arduino Uno itself with wires. That variable should change the hole pattern in the head.  Also, the servo types for both the hips and ankles should be configurable with the `servo_type_hip` and `servo_type_ankle` variables which can select between SG90 (nylon gear) and MG90S (metal gear) micro servos.

I'd like to control overall dimensions of the bot with variables for the body's width (`body_width`), depth (`body_depth`), and height (`body_height`), as well as a variable for head height (`head_height`).  The shell thickness for both the body (`body_thickness`) and head (`head_thickness`) should also be adjustable. There also needs to be a way to control the nose, with a variable for the diameter (`nose_diameter`), and its vertical distance from the eyes (`nose_distance`). Finally I need variables to manage the brain mounting screws, including screw size (`brain_screw_size`) and whether the screw goes all the way through the head (`brain_screw_thru`). I also need an option to make the legs solid or not using `leg_solid`.

I'm also using a couple of constant values within the code, like `part_clearance=0.25`, `arduino_holes=[[-27,-7],[-27,20.9],[25.2,26.1],[23.825,-22.25]]`, and `proto_holes=[[27,-10],[-17.9,-10],[26,25.5],[-17.7,25.5]]`, these could be good to keep as constants as well if that works better.

The design should use chamfered boxes rather than just cubes, and I noticed you might need some custom modules like `box_chamfer`, `box_chamfer2`, and `box_chamfer3` as well as modules to mirror in X and Y, `mirrorx` and `mirrory` respectively.  The original code uses a lot of `difference()`, `union()`, and `translate()` for shaping, as well as some `linear_extrude()` and `rotate()`. A `warnings()` module is also needed to error out when there are conflicts with specific board types and the specified dimensions.

Can you generate OpenSCAD code with the necessary modules and variables? It should all be within one or a few .scad file(s) but I'm happy with however you choose to organize it. No included libraries are needed.

[Assistant]
Otto.scad:
```
// Part to print
part="all"; // [all:Preview Bot,head:Head,body:Body,leg:Leg,foot_left:Left Foot,foot_right:Right Foot]

// Brain type (hole pattern in head)
brain_type="nano_shield"; // [nano_shield:Stock (Arduino Nano + Servo Shield),nano_proto:Arduino Nano + Proto board,uno_shield:Arduino Uno + Servo Shield,uno:Arduino Uno (and wires)]

// Servo Type for hip
servo_type_hip="sg90"; // [sg90:SG90 (nylon gear micro servo),mg90s:MG90S (metal gear micro servo)]

// Servo Type for ankle
servo_type_ankle="sg90"; // [sg90:SG90 (nylon gear micro servo),mg90s:MG90S (metal gear micro servo)]

// Body Width (Head width is based off this)
body_width=67; // [67:200]

// Body Depth (Head depth is based off this)
body_depth=68; // [68:200]

// Body Height
body_height=38; // [20:200]

// Head Height
head_height=34; // [20:200]

// Body Shell Thickness
body_thickness=1.75; // [0.25:0.25:8]

// Head Shell Thickness
head_thickness=2; // [0.25:0.25:8]

// Nose Diameter (6 = Small Toggle Switch)
nose_diameter=6; // [0:24]
// Vertical distance between center of eyes and nose
nose_distance=15; // [-8:190]

// Brain Screw Size (2 = Stock)
brain_screw_size=2; // [2:5]

// Make Brain Screw thru Skull
brain_screw_thru=0; // [1:Yes,0:No]

// Solid leg
leg_solid=0; // [1:Yes, solid,0:No, my printer doesn't like those overhangs]

/* [Hidden] */
part_clearance=0.25;

arduino_holes=[[-27,-7],[-27,20.9],[25.2,26.1],[23.825,-22.25]];
proto_holes=[[27,-10],[-17.9,-10],[26,25.5],[-17.7,25.5]];

print_part();

module print_part() {
  warnings()
    draw_part();
}

module draw_part() {
  if(part=="head")
    head();
  else if(part=="body")
    body();
  else if(part=="leg")
    leg();
  else if(part=="foot_left")
    foot();
  else if(part=="foot_right")
    mirror([1,0]) foot();
  else if(part=="all")
    rotate([0,0,-90]) otto();
}
module otto() {
  head(move=1);
  body(move=1);
  mirrory() {
    translate([0,body_width/2-33.5,0])
    {
      mirror([1,0]) foot(move=1);
      translate([0,24,-1]) mirror([0,0,1]) leg(move=0);
    }
  }
}
function brain_type_text() = (
  brain_type=="nano_shield"?"Arduino Nano + Servo Shield":(
  brain_type=="uno_shield"?"Arduino Uno + Servo Shield":(
  brain_type=="nano_proto"?"Arduino Nano + Proto board":"Unknown")));
module warnings() {
  if(brain_type=="nano_shield")
  {
    if(body_width<67)
      error(str("If ",brain_type_text()," is used, Body Width must be >= 67!"));
    else if(body_depth<67)
      error(str("If ",brain_type_text()," is used, Body Depth must be >= 67!"));
    else children();
  } else if(brain_type=="uno_shield"||brain_type=="uno")
  {
    if(body_width<81)
      error("If Arduino Uno is used, body width MUST be greater than 81!");
    else children();
  } else children();
}
module error(s) {
  echo(str("***ERROR*** ",s));
  rotate([0,0,-45])
        rotate([80,0,0]) color("red") text(s);
}
module body(dims=[body_depth-1,body_width,body_height]) {
  left=dims[0]/-2; // -33.5
  botm=dims[1]/-2; // -33.5
  right=dims[0]/2; // 34
  servozoff=servo_type_hip=="sg90"?2:0;
  *#import("Otto_DIY/files/OTTO_body_v3.stl");
  mirrorx(0.4) mirrory(0.25) translate([left+body_thickness,botm+body_thickness+13.775,body_thickness]) {
      cube([dims[0]/2-9,2.5,12.4]);
      translate([0,2.5,12.39]) rotate([90,0,90]) mirror([1,0]) linear_extrude(dims[0]/2-9,convexity=10) polygon([[0,0],[1.2,0.825],[2.5,0.825],[2.5,0]]);
  }
  mirrory() mirrorx() translate([left+body_thickness-.01,botm+6,dims[2]-16]) difference(){
    cube([2,13.7,5]);
    translate([0,-.01]) rotate([0,41]) cube([3,13.72,5]);
  }
  mirrory() for(x=[0,28.2]) translate([x-9.5,botm+body_thickness,body_thickness]) difference() {
    union(){
      cube([2,13.775,6.18-servozoff]);
      translate([0.98,6.85,0]) cylinder(d1=5.7,d2=4.4,h=0.85,$fn=30);
      translate([0.98,6.85,0.84]) cylinder(d=4.4,h=5.35-servozoff,$fn=40);
    }
      translate([0.98,6.85,-.01]) cylinder(d=1.9,h=7,$fn=20);
  }
  for(mx=[0,1],my=[0,1]) mirror([mx,0]) mirror([0,my]) translate([mx?-11:0,0])
  translate([left+body_thickness+22.2,botm+body_thickness,body_thickness]) difference() { union() {
      if(!mx&&!my)
        translate([-10.7,6.61])
          cylinder(d=16,h=6.25-servozoff,$fn=50);
      else if(!mx&&my)
        translate([-17.5,0,.01]) cube([11.9,13.2,6-servozoff]);
      translate([-1-(left+33),5.64,0]) mirror([1,0]) cube([(mx?-22:-12)-left,2,6.1-servozoff]);
    }
    if(!mx&&!my)
      translate([-10.72,6.61,-.01]) cylinder(d=12,h=6.27,$fn=40);
    else if(!mx&&my)
      translate([-15.9,5,-.01]) {
        cube([8.35,8.2,7]);
        translate([0,-6]) cube([8.35,4,7]);
      }
  }
  difference() {
      translate([left,botm,0]) box_chamfer(dims,ch=2,chvx=5,chvy=5);
//    translate([left+1.75,botm+1.75,2]) box_chamfer([dims[0]-3.5,dims[1]-3.5,dims[2]],ch=1,chvx=4,chvy=4,inside=1);
    translate([left+body_thickness,botm+body_thickness,2]) box_chamfer([dims[0]-body_thickness*2,dims[1]-body_thickness*2,dims[2]],ch=1,chvx=4,chvy=4,inside=1);
    translate([0,0,-1]) linear_extrude(10,convexity=10) {
      mirrory() {
        translate([.1,botm+8.5]) circle(d=12,$fn=30);
        translate([6,botm+8.5]) circle(d=servo_type_hip=="mg90s"?6.5:7,$fn=20);
        offset(-1) offset(1)
        translate([-14.5,-15]) square([29,4]);
      }
      translate([left+9,-botm-13.5]) square([5.2,5.2]);
      translate([left+12.8,botm+8.35]) {
        circle(d=2,$fn=20);
        for(r=[2:360/7:359]) rotate([0,0,r]) translate([4.1,0]) circle(d=2,$fn=20);
      }
    }
    mirrory() translate([-11.7,right-body_thickness-.51,dims[2]-11]) {  cube([22.35,body_thickness+0.6,4]);
      translate([0,body_thickness+.02,4.1]) rotate([-35,0]) mirror([0,0,1]) mirror([0,1,0]) cube([22.35,4,5.4]);
    }
  }
}
module head(dims=[
    body_width-(body_thickness+part_clearance)*2,
    body_depth-(body_thickness+part_clearance)*2,
    head_height],brain_type=brain_type,head_thickness=head_thickness,move=0) {
  left=dims[0]/-2; // -31.5
  botm=dims[1]/-2; // -32.25
  right=dims[0]/2; // 31.5
  translate(move?[0,0,body_height+head_height-3]:[]) rotate(move?[180,0,-90]:[]) {
    //#import("Otto_DIY/files/OTTO_head_v3.stl");
    difference(){
      translate([left,botm,0]) box_chamfer(dims,ch=2,chy1=3.5,chvx=5.5,chvy=4);
      translate([left+head_thickness,botm+head_thickness+1.501,head_thickness]) box_chamfer([dims[0]-head_thickness*2,dims[1]-head_thickness*2-1.5,dims[2]],ch=1,chvx=2.75,chvy=2.75,inside=1);
      translate([left,botm-.01,dims[2]-3.8]) cube([dims[0],1.5,10]);
      for(x=[-13.25,13.25])
        translate([x,botm-.01,15]) rotate([-90,0]) cylinder(d=16.5,h=4,$fn=50);
      brain_holes(brain_type,top=dims[1]/2-20,right=dims[0]/2);
      translate([-5.6,-29.555,3.75]) {
        translate([11.25,0]) rotate([-90,0]) rotate([0,0,180]) intersection() {
          box_chamfer([11.3,7.6,2],ch=0,chvx=1.6,chvy=1.6);
          translate([0,0,-.8]) box_chamfer([11.3,7.6,4],ch=1.6,chvx=0,chvy=0);

        }
      }
      if(nose_diameter>0&&dims[2]-(nose_diameter/2+nose_distance)>18)
      {
        translate([0,botm-.01,15+nose_distance]) rotate([-90,0]) cylinder(d=nose_diameter,h=head_thickness+2.02,$fn=30);
      } else echo(str("Warning: Hiding nose."));
    }
    // tabs
    mirrorx() translate([-left-2,-9.25,dims[2]]) rotate([-90,0]) mirror([0,1,0]) linear_extrude(21,convexity=10) polygon([[0,0],[0,8.4],[1.98,8.4],[4.1,6.3],[4.1,4.2],[2,2.5],[2,0],]);
    mirrory(0.75) mirrorx(0) translate([left+4.5,botm+1.5,dims[2]]) rotate([90,0]) mirror([0,0,1]) linear_extrude(2) polygon([[0,0],[0,6],[2,8],[12,8],[14,6],[14,1.5],[15.5,0]]);
    brain(brain_type=brain_type,top=dims[1]/2-20,right=dims[0]/2);
  }
}
module leg(move=0) {
  bo=servo_type_ankle=="sg90"?0:(
    servo_type_ankle=="mg90s"?1.6:0);
  translate(move?[0,24,-40]:[]) rotate([0,0,0]) union(){
  //#import("Otto_DIY/files/OTTO_leg_v4.stl");
  difference() {
    translate([-14.5,-8.25,0]) {
      intersection() {
        cube([29,16.5,38.5]);
        union(){
          box_chamfer([29,16.5,20],2);
          translate([0,0,38.6]) mirror([0,0,1]) box_chamfer([29,16.5,20],1.25,chvx=2,chvy=2);
          *translate([1,1,30])
            box_chamfer2([29-2,16.5-2,7],2);
        }
      }
    }
    translate([-12.5,-6.25,4.25]) cube([25,12.5,50]);
    translate([12,-3,5]) cube([6,6,7.5]);
    translate([0.5,0,2.6-(servo_type_hip=="mg90s"?0:1)]) rotate([0,0,90]) {
      linear_extrude(3.4)
        polygon([[-3.1,0],[-2,20],[2,20],[2.8,0]]);
      translate([0,0,-3.01]) cylinder(d=servo_type_ankle=="mg90s"?7.8:7.4,h=8,$fn=30);

    }
    translate([-14.5-.01,0,28.5]) rotate([0,90,0]) {  cylinder(d=4,h=5,$fn=30);
      rotate([0,0,90]) translate([0,0,5]) {
        cylinder(d=12,h=30,$fn=30);
        translate([0,-5.5]) cylinder(d=servo_type_ankle=="mg90s"?6.5:7,h=30,$fn=20);
        translate([-6,0]) cube([12,30,30]);
      }
    }
    if(!leg_solid)
      mirrory() translate([-11.525,-8.3,4.9]) mirror([0,1,0]) rotate([90,0]) linear_extrude(5) {
      //square([21.565,12.93]);
      polygon([[0,0],[0,5.7],[6.1,12.93],[21.565-5.7,12.93],[21.565,5.7],[21.565,0]]);
    }
    translate([-15,0,9]) rotate([0,90,0]) cylinder(d=2.5,h=5,$fn=20);
  }
  difference() {
    translate([8.55-bo,-3.8,4]) cube([4+bo,7.6,7.5]);
    translate([10-bo,-3,5]) cube([4+bo,6,8]);
    translate([8.5-bo,0,9]) rotate([0,90,0]) cylinder(d=2.2,h=2,$fn=20);
  }
}
}
module foot(move=0) {
  servohornoff=(servo_type_ankle=="sg90"?2:0);
  translate(move?[0,34.5,-48]:[])
  //*translate([0,44,0]) import("Otto_DIY/files/OTTO_footL_v4.stl");
  difference(){
    union(){
      translate([-31,-20,0]) {
        intersection() {
          cube([62,40,5]);
          translate([0,0,-3]) box_chamfer3([62,40,8.01],2);
          *translate([2.8,2.8,0]) box_chamfer2([56.3,34.4,2.5],4);
        }
      }
      translate([15.8,-9.5,15.75]) sphere(d=4,$fn=30);
      for(m=[0,1]) mirror([m,0])
      translate([-21.15,-20,0]) difference() {
        intersection(){
          cube([4+(m?1.1:1.5),21,24.5+(m?0:2)]);
          box_chamfer3([41.8,21,25+(m?0:2)],2);
          *translate([2.8,2.8,0]) box_chamfer2([36.2,15.4,22.5],4);
        }
        translate([5.5,-.01,-.01]) cube([31.3,21.02,25.02]);
        if(m==0)
        translate([-.01,10.5,15.5]) rotate([0,90]) {
            cylinder(d=7.3,h=6+servohornoff,$fn=30);
            translate([-8,0]) cylinder(d=1,h=6+servohornoff,$fn=10);
            rotate([0,0,90]) linear_extrude(2+servohornoff) {
            polygon([[-3.5,0],[-2,10+(m?0:2)],[2,10+(m?0:2)],[3.5,0]]);
          }
        }
      }
    }
    translate([-15.7,-21.01,1]) {
      translate([0,-1,0]) box_chamfer3([31.8,26.02,10],2);
      *intersection(){
        cube([31.8,25.02,10]);
        translate([2,0,2.8]) box_chamfer2([27.3,22,8],4);
      }
    }
  }
}
module brain_holes(brain_type=brain_type,
    right=(body_width-(body_thickness+part_clearance)*2)/2,
    top=(body_depth-(body_thickness+part_clearance)*2)/2-20) {
    blo=(brain_type=="uno_shield"||brain_type=="uno"?14:0);
    bto=(brain_type=="uno_shield"?4:(brain_type=="nano_shield"?-.5:0));
  if(brain_type=="nano_proto") {
    translate([right-2.76,-.2,20.5]) rotate([0,90]) rotate([0,0,90]) usb_mini();
  }
  if(brain_type=="nano_shield"||brain_type=="uno_shield"||brain_type=="uno")
  {
    translate([right-31.5-blo,top-12.5-bto,brain_screw_thru?-.01:head_thickness]) for(pos=arduino_holes) translate(pos) cylinder(d=brain_screw_size,h=3+head_thickness+.02,$fn=24);
  }
  if(brain_type=="nano_shield") {
    translate([0,top-12])
    {
    translate([right+.01,18.163,12.875]) rotate([0,-90]) cylinder(d=8,h=4,$fn=24);
    translate([right-2.76,12.5,4.815]) cube([2.06,10.5,14.2]);
    translate([right-2.76,-2.4,19.5]) rotate([0,90]) rotate([0,0,90]) usb_mini();
    }
  } else if(brain_type=="uno_shield"||brain_type=="uno") {
    translate([right-head_thickness-.01,top,7]) {
      cube([head_thickness+.02,8.9+part_clearance*2,10.9+part_clearance*2]);
      translate([0,-31.7]) cube([head_thickness+.02,12+part_clearance*2,10.9+part_clearance*2]);
    }
  }
}
module brain(brain_type=brain_type,
  right=(body_width-(body_thickness+part_clearance)*2)/2,
  top=(body_depth-(body_thickness+part_clearance)*2)/2-20)
{
  blo=(brain_type=="uno_shield"||brain_type=="uno"?14:0);
  bto=(brain_type=="uno_shield"?4:(brain_type=="nano_shield"?-.5:0));
  translate([right-31.5-blo,top-12.5-bto]) {
  if(brain_type=="nano_shield"||brain_type=="uno_shield"||brain_type=="uno") {
    translate([-25.4,-25,2]) mirror([0,1]) cube([2,4.9+(top-12),3.9]);
    translate([-27-brain_screw_size/2,-8,2]) mirror([1,0]) cube([3-brain_screw_size/2+(right-34),2,3]);
    translate([-27-brain_screw_size/2,20,2]) mirror([1,0]) cube([3-brain_screw_size/2+(right-34),1.98,3]);
    translate([-25.375,29.075,2]) cube([2,1.5+bto,3.9]);
    translate([23.626,29.075,2]) cube([2,1.5+bto,3.9]);
    translate([27,25,2]) cube([4,2,3]);
    translate([22.877,-24,2]) mirror([0,1]) {
      translate([0,1.125]) cube([2,4.875+(top/2+bto-6),3.9]);
      cube([2,6,3]);
    }
    translate([0,0,1.99]) for(pos=arduino_holes)
      translate(pos) brain_screw();
  } else if(brain_type=="nano_proto") {
    translate([0,2,2]) cube([10,4,3]);
    translate([0,0,2]) for(pos=proto_holes)
       translate(pos) {
         difference() {
           union() {
             brain_screw();
             if(pos[1]>0)
              translate([-1,2]) cube([2,4,3]);
             else if(pos[0]>15)
               translate([0,-1]) cube([4,2,3]);
           }
           translate([0,0,-.01]) cylinder(d=2,h=4.02,$fn=20);
       }
     }
     }
  }
}
module brain_screw(brain_screw_size=brain_screw_size) {
  difference() {
    union(){
      cylinder(d=brain_screw_size+2.3,h=3,$fn=30);
      cylinder(d1=brain_screw_size+4,d2=brain_screw_size+2.3,h=1,$fn=30);
    }
    translate([0,0,-.01]) cylinder(d=brain_screw_size,h=4.02,$fn=20);
  }
}
module usb_mini() {
  linear_extrude(3,convexity=10) {
    translate([0.6,0]) union() {
      translate([0,0.1]) square([8-1.202,4]);
      for(x=[0.1,6.7]) translate([x,0.1]) circle(r=0.1,$fn=20);
      translate([0.1,0]) square([6.6,4]);
    }
    mirrorx(3.999) translate([0.4,1.81]) difference() {
      square([0.2,0.2]);
      circle(r=0.2,$fn=20);
    }
    translate([0,2.008]) union() {
      translate([0.1,0.2]) square([7.8,1.9]);
      translate([0.2,0]) square([7.6,2.1]);
      translate([0,0.1]) square([8,1.9]);
      for(x=[0.2,7.8])
        translate([x,0.2]) circle(r=0.2,$fn=20);
      for(x=[0.1,7.9])
        translate([x,2]) circle(r=0.1,$fn=20);
    }
  }
}

module box_chamfer3(dims,ch=1,bot=1)
{
  render() intersection() {
    cube(dims);
    minkowski()
    {
      translate([ch,ch,ch]) cube([dims[0]-ch*2,dims[1]-ch*2,dims[2]-ch*2]);
      *sphere(r=ch/sin(60),$fn=10);
      for(m=[0,1]) mirror([0,0,m])
        cylinder(r1=ch,r2=m?(bot?0:ch):0,h=ch,$fn=4);
    }
  }
}
module box_chamfer2(dims,ch=1)
{
  render() minkowski()
  {
    cube(dims);
    intersection()
    {
      rotate([45,0,45]) cube(ch,center=true);
      rotate([45,0,-45]) cube(ch,center=true);
    }
  }
}
module box_chamfer(dims,ch=1,chx1="auto",chx2="auto",chy1="auto",chy2="auto",chvx="auto",chvy="auto",inside=0) {
  x1=chx1=="auto"?ch:chx1;
  x2=chx2=="auto"?ch:chx2;
  y1=chy1=="auto"?ch:chy1;
  y2=chy2=="auto"?ch:chy2;
  vx=chvx=="auto"?ch:chvx;
  vy=chvy=="auto"?ch:chvy;
  difference(){
    cube(dims);
    if(x1)
    {
      translate([x1,-.01]) rotate([0,-45]) mirror([1,0]) cube([x1*2,dims[1]+.02,x1*2]);
      *if(vx)
      translate([9.9,0]) rotate([0,0,45]) translate([-5+x1,0]) translate([x1,-.01]) rotate([0,-45]) mirror([1,0])  cube([x1*2,dims[1]+.02,x1*2]);
    }
    if(x2)
      translate([dims[0]-x2,-.01]) rotate([0,45]) cube([x2*2,dims[1]+.02,x2*2]);
    if(y1)
      translate([-.01,y1]) rotate([45,0]) mirror([0,1,0]) cube([dims[0]+.02,y1*2,y1*2]);
    if(y2)
      translate([-.01,dims[1]-y2]) rotate([-45,0]) cube([dims[0]+.02,y2*2,y2*2]);
    if(vx)
    {
      mirrorx(dims[0]/2) {
        translate([vx,0,-.01]) rotate([0,0,45]) mirror([1,0]) cube([vx*2,vx*2,dims[2]+.02]);
        translate([inside?-1.4:-1.5,inside?0:-1.1]) rotate([0,0,45])
        mirror([1,0,0]) rotate([0,45,0])
        translate([-vx,-vx]) translate([0,0,vx/-.75]) cube([10,vx*2,vx*2]);
      }
    }
    if(vy)
      mirrorx(dims[0]/2) {
        translate([0,dims[1]-vy,-.01]) rotate([0,0,-45]) mirror([1,0]) cube([vy*2,vy*2,dims[2]+.02]);
        translate([0,dims[1]+(inside?-0.25:0.5),-.01])
          rotate([0,0,-45]) mirror([1,0,0])
          rotate([0,-45,0])
          translate([-vx,-vx]) translate([0,0,vx/-.75])
          cube([10,vx*2,vx*2]);
      }
  }
}
module mirrory(offset=0)
{
  translate([0,offset,0]) for(m=[0,1]) mirror([0,m,0]) translate([0,offset*-1,0]) children();
}
module mirrorx(offset=0)
{
  translate([offset,0]) for(m=[0,1]) mirror([m,0]) translate([offset*-1,0]) children();
}
module otto_stl() {
  translate([0,0,66]) rotate([180,0,-90]) import("Otto_DIY/files/OTTO_head_v3.stl");
  import("Otto_DIY/files/OTTO_body_v3.stl");
  translate([0,-34.5,-48]) import("Otto_DIY/files/OTTO_footR_v4.stl");
  translate([0,34.5,-48]) import("Otto_DIY/files/OTTO_footL_v4.stl");
  for(y=[-25,25])
    translate([0,y,-40]) rotate([0,0,0]) import("Otto_DIY/files/OTTO_leg_v4.stl");
}
```


[User]
Hey, I'm looking for some help generating a set of OpenSCAD files for creating pegboards and/or peg holes for other projects. I've been playing around with an existing file but would like to start fresh with something a bit more tailored to my specific workflow.

Basically, I'd like a design that can create either a full pegboard with a surrounding border or just the peg holes themselves, depending on what I need at the time. I want it to be parametric, so I can easily adjust sizes for things like board width and height, the thickness, peg spacing and hole diameter, peg height, and the size of the chamfer on the corners of the board. I'd like to be able to switch between generating the full board or just the peg holes, with the peg holes centered on the board.

Specifically, the parameters should include:
*   `board_width`:  The width of the pegboard.
*   `board_height`: The height of the pegboard.
*   `board_thick`: The thickness of the pegboard.
*   `hole_offset`: The center-to-center spacing between peg holes.
*   `hole_dia`: The diameter of the peg holes.
*   `hole_height`: The height of the pegs (for when creating pegs).
*   `chamfer`: The size of the chamfer on the corners of the board.
*   `type`: A variable to switch between "pegboard" mode (1) which includes the surrounding board and "pegs only" mode (0).

I would like the output to be a set of .scad files. I'm not planning to use any custom libraries, so a pure vanilla OpenSCAD solution should be great.

[Assistant]
Pegboard_and_Holes_v2.scad:
```
/* Open SCAD Name.: PegboardandHoles_v2.scad
*  Copyright (c)..: 2017 www.DIY3DTech.com
*
*  Creation Date..: July-2017
*  Description....: Code to create pegboard or pegboard holes
*
*  Rev 1: Develop Model
*  Rev 2:
*
*  This program is free software; you can redistribute it and/or modify
*  it under the terms of the GNU General Public License as published by
*  the Free Software Foundation; either version 2 of the License, or
*  (at your option) any later version.
*
*  This program is distributed in the hope that it will be useful,
*  but WITHOUT ANY WARRANTY; without even the implied warranty of
*  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
*  GNU General Public License for more details.
*/

/*------------------Customizer View-------------------*/

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

/*---------------------Parameters---------------------*/

//board width in mm
board_width         =   90; //[1:1:500]

//board height in mm
board_height        =   90; //[1:1:500]

//board thickness in mm
board_thick         =     3; //[1:0.5:10]

//hole offset (1 inch or 25.6mm is standard)
hole_offset         =    25.60;//[10:0.1:30]

//hole diamiter (standard is 1/4 inch or 6.25mm)
hole_dia            =     6.25; //[5:0.25:8]

//Peg height for export
hole_height         =     6.0; //[1:1:30]

//chamfer of of the board corners (will add to width)
chamfer             =     3; //[1:0.5:5]

//Pegboard = 1 Pegs Only = 0
type                =     1; //[0:1:1]

/*-----------------------Execute----------------------*/

main_module();

/*-----------------------Modules----------------------*/

module main_module(){ //create module
    difference() {
            union() {//start union

    if (type ==1) {
                    translate ([((board_width/2)-((board_width-(round((board_width-(hole_offset-(hole_dia/2)))/hole_offset))*hole_offset)/2)),((board_height/2)-((board_height-(round((board_height-(hole_offset-(hole_dia/2)))/hole_offset))*hole_offset)/2)),0]) rotate ([0,0,0]) rounded(board_width,board_height,board_thick,chamfer,true);
                }else{
                    for (i=[0:round((board_width-(hole_offset-(hole_dia/2)))/                        hole_offset)])
                                for (j=[0:round((board_height-(hole_offset-(hole_dia/2)))/                            hole_offset)])translate ([i*hole_offset,j*hole_offset,0]) rotate ([0,0,0]) cylinder(hole_height,hole_dia/2,hole_dia/2,$fn=60,true);

            }; //end if union if tstaement

                    } //end union

    //start subtraction of difference
                     if (type ==1) {
                            for (i=[0:round((board_width-hole_offset)/                        hole_offset)])
                                for (j=[0:round((board_height-hole_offset)/                            hole_offset)])

                                {translate ([i*hole_offset,j*hole_offset,0]) rotate ([0,0,0]) cylinder(hole_height,hole_dia/2,hole_dia/2,$fn=60,true);
                   }

                }
             else{

                }; //end of diff if statement

    } //end difference
}//end module

module rounded(x,y,z,c,center) {

    // c = Chamfer amount this will add (in mm) to each axis

     //create overlapping cubes
        //cube one overlapps in the X axis with chamfer "c" being doubled
        cube ([x+(c*2),y,z],true);
        //cube two overlapps in the Y axis with chamfer "c" being doubled
        cube ([x,y+(c*2),z],true);
     //end overlapping cubes

     //create corner circles
        translate ([-(x/2),-(y/2),0]) { cylinder( z,c,c,$fn=60,true);
        }
        translate ([-(x/2),(y/2),0]) { cylinder( z,c,c,$fn=60,true);
        }
        translate ([(x/2),-(y/2),0]) { cylinder( z,c,c,$fn=60,true);
        }
        translate ([(x/2),(y/2),0]) { cylinder( z,c,c,$fn=60,true);
        }
     //end coner circle

} //end module

/*----------------------End Code----------------------*/
//translate ([0,0,0]) rotate ([0,0,0]) cylinder(5,3,3,true);
//translate ([0,0,0]) rotate ([0,0,0]) cube([18,18,18],true);
//translate ([0,0,0]) sphere($fn = 0, $fa = 12, $fs = 2, r = 1);
//translate ([0,0,0]) rotate ([0,0,0]) rounded (15,15,1,1,true);
```


[User]
Hey, I'm looking to create a generative design for some reef-like structures, starting with anemones. I've got a basic concept in mind, but I need help putting it into code, specifically in OpenSCAD.

I'd like to have a parametric anemone generator, similar to the one I saw that uses noise functions to create the tentacle shapes. The design should include a base and a set of tentacles that curl and twist in a somewhat organic-looking way. I need to be able to control the number of tentacles, how much they twist, their max and min lengths, and the overall size of the base.

Here's a breakdown of the features I'm looking for:

*   **Base:** A roughly cylindrical base that tapers slightly, and has some organic variation around the edges, like it’s a natural growth.
*   **Tentacles:**
    *   The number of tentacles should be adjustable.
    *   Each tentacle should have a twisting, curling shape.
    *   The amount of twist should be controllable via a parameter.
    *   There should be parameters for the maximum and minimum lengths of the tentacles to vary their size.
    *   The tentacles should have a smooth, organic curve to them, not just a simple straight line or perfect spiral.
*   **Noise:** I like the way some designs use 1D noise to generate the shapes. I'd like that included, if possible. I want the ability to control how the noise affects the twist and potentially the tentacle lengths, making each anemone slightly different. The code I've seen uses a `single_noise_1d` function for this. It might be helpful to use the `smooth_curve` `clamp` and `lerp` functions along with `rands` similar to that one.
*   **Customization:** It would be great if the generator could output several variations easily – like the base and the tentacles as separate pieces, and then a version with everything together as a single part.

I'm thinking of using the noise functions and random number generation to give each anemone a unique look, as I plan on printing a variety of them. I also need some basic OpenSCAD knowledge to begin. I really like the way the other designer used recursion to generate the positions of the tentacles.

Could you generate the OpenSCAD code to achieve this? I don't have any existing code to provide.

[Assistant]
anemone_thingiverse.scad:
```
//    Anemone generator
//    Fernando Jerez 2017
//    License:CC Attributtion only
//    This script uses Noise functions taken from Torleif website:
//    https://openscadsnippetpad.blogspot.com.es/2017/05/1-dimensional-noise.html
//
//

// This is only to force Customizer create many files. Changes doesnt matter. Just click CREATE THING
part = "all"; // [all:See anemone and base, anemone1: Anemone 1, anemone2: Anemone 2,base1: Base 1,base2: Base 2]

// Number of tentacles
tentacles = 20; //[1:40]

// Twist (of tentacles)
twist = 50; // [0:100]

// Tentacle max length
maxlength = 60; //[1:100]

// Tentacle min length
minlength = 30; //[1:100]

/* [Hidden] */

sem = round(rands(1,10000,1)[0]); // Random seed

// Generates a Smooth Noise list with values between -0.5 and 0.5
maxnoi = 1000;
noi2 = [ for (i = [0 : maxnoi]) single_noise_1d(i*0.1+sem)-0.5];
// Reduces non-rotating zones from noise sequence
noi = [ for (i = [0 : maxnoi]) noi2[ (i + 1*max(0.1,5-10*abs(noi2[i])))%maxnoi] ];

// Generate a rotation list using Recursion
function noiserot(i,n) = (i==0) ? 0 : noiserot(i-1,n) + twist*noi[(i+n)%maxnoi];
rotlist = [for (i=[0:maxnoi]) noiserot(i,0)];

// Generates a list of positions using RECURSION
function stepPos(steps,i,n)=
    (i==0)
    ?
    [0,0,0]
    :
    stepPos(steps,i-1,n)+[(steps-i)*0.75*sin(rotlist[(i+n)%maxnoi]),(steps-i)*0.75*cos(rotlist[(i+n)%maxnoi]),(steps-i)*0.75*sin(rotlist[(i+n)%maxnoi])];

lados = tentacles;
grados = 360/lados;
limits = rands(min(maxlength,minlength),max(maxlength,minlength),lados,sem);

// FIGURE

if(part=="all" || part=="base1" || part=="base2" || part=="base3" ){
    // anemone - base
    translate([0,0,-10]){
        color("Orange") anemone_base(radius=10,height=20);
    }
}

if(part=="all" || part=="anemone1" || part=="anemone2" || part=="anemone3" ){
    // anemone - tentacles
    cylinder(r=10,h=7);
    translate([0,0,-1]) cylinder(r1=9,r2=10,h=1);

    translate([0,0,5])
    difference(){
        scale([0.1,0.1,0.1]){
            for(g=[0:grados:360-grados]){
                // Generate position list var g is for offset in noiserot list
                limit = round(limits[g/grados]);
                offs = g;

                poslist = [for (i=[0:limit]) stepPos(limit,i,offs)];

                rotate([0,0,g])
                translate([0,0,0.3*limit*limit])
                {
                // Draw geometry using list positions

                    for(i=[0:limit]){
                        rad = limit-i;
                        px = poslist[i][0];
                        py = poslist[i][1];
                        pz = -0.3*rad*rad;
                        translate([px,py,pz]) rotate([90+38,0,-rotlist[i+offs]]) cylinder(r=rad, h=rad*1.3,$fn=12);
                    }
                }
            }
        }
        translate([0,0,-50]) cube([300,300,100], center = true);
    }
}

module anemone_base(radius = 10, height=30){
    numpuntos = height;
    puntos = concat([[2,height],[0,height-2]],[[0,0]],[ for (i = [0 : numpuntos]) [0.2*(height-i)+1+radius*0.35*single_noise_1d(i*0.2+sem),i] ]);
    rotate_extrude(angle=360){
        translate([radius,0,0])
        polygon( puntos);
    }
}

// NOISE FUNCTIONS
// https://openscadsnippetpad.blogspot.com.es/2017/05/1-dimensional-noise.html
function single_noise_1d(i)=
let(
a=floor(i),
b=ceil(i),
c=smooth_curve(i-a),
arnd=rnd(1,0,a),
brnd=rnd(1,0,b),
out=lerp(arnd,brnd,c)
)
out
;

function smooth_curve(a) =let (b = clamp(a))(b * b * (3 - 2 * b));
function clamp(a, b = 0, c = 1) = min(max(a, b), c);
function lerp(start, end, bias) = (end * bias + start * (1 - bias));
function rnd(a = 1, b = 0, s = []) =
  s == [] ?
   (rands(min(a, b), max(   a, b), 1)[0])
  :
   (rands(min(a, b), max(a, b), 1, s)[0])
  ;

```


[User]
Hey, I'm looking to generate some octopus models for 3D printing, and I came across this cool design that uses noise functions to make each one unique. I'd like to have a parametric design that lets me create different kinds of octopuses, similar to what's described.

Specifically, I want to be able to choose between two main styles for the tentacles: a "mechanic" style, which uses cylinders, and an "organic" style, which uses spheres. I also need to be able to choose between "mechanic" and "organic" styles for the head. The mechanic head has some cylinder-based features, while the organic head is more like a smooth ball with eye-like protrusions.

The tentacles should have a kind of winding, slightly random path, and each tentacle should be the same, originating from a central point. I'd want the number of tentacles to be adjustable, as well as the length and general "waviness" or "curviness" of each tentacle. The head should sit centered above the tentacles.

I'm hoping to use similar noise functions to the ones described to make each octopus slightly different, even if I generate them using the same parameters. I also need to be able to easily scale the entire model up or down. It would also be great if the generated model has some base to make it easily printable.

Could you help me generate the necessary OpenSCAD code, including any required noise functions? I don't have any library preferences. Thanks!

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

    Octopus generator

    Fernando Jerez 2017

    License:CC-NC. Creative Commons, Non Commercial

    This script uses Noise functions taken from Torleif's website:
    https://openscadsnippetpad.blogspot.com.es/2017/05/1-dimensional-noise.html

*/

// This is only to force Customizer create many files. Changes doesnt matter.
part = "octopus1"; // [octopus1: Octopus #1,octopus2: Octopus #2,octopus3: Octopus #3,octopus4: Octopus #4,octopus5: Octopus #5 ]

// Tentacles style
style = "mechanic"; // [mechanic: Mechanic style, organic: Organic style]
// head style
headstyle = "mechanic"; // [mechanic: Mechanic style, organic: Organic style]

/* [Hidden] */

// Generates a Smooth Noise list with values between -0.5 and 0.5
sem = round(rands(1,1000,1)[0]);
echo (sem);
//sem=705;
maxnoi = 1000;
noi2 = [ for (i = [0 : maxnoi]) single_noise_1d(i*0.1+sem)-0.5];
//echo(min(noi));
//echo(max(noi));

// Reduces 'non-rotating zones' from noise sequence
noi = [ for (i = [0 : maxnoi]) noi2[ (i + 1*max(0.1,5-10*abs(noi2[i])))%maxnoi] ];
//echo (noi);

// Generate a rotation list using Recursion
function noiserot(i,n) = (i==0) ? 0 : noiserot(i-1,n) + 50*noi[(i+n)%maxnoi];
rotlist = [for (i=[0:maxnoi]) noiserot(i,0)];

// Generates a list of positions using RECURSION
function stepPos(steps,i,n)=
    (i==0)
    ?
    [0,0,0]
    : let(m=(steps-i)*0.75, g=rotlist[(i+n)%maxnoi])
    stepPos(steps,i-1,n)+[m*sin(g),m*cos(g),m*sin(g)];

lados = 8;
grados = 360/lados;

difference(){
    scale([0.1,0.1,0.1]){
        for(g=[0:grados:360-grados]){
            // Generate position list (var g is for offset in noiserot list)
            limit = 60;
            offs = g;

            poslist = [for (i=[0:limit]) stepPos(limit,i,offs)];

            rotate([0,0,g])
            translate([50,0,0])//0.45*limit*limit])
            {
            // Draw geometry using list positions

                for(i=[0:limit]){
                    rad = limit-i;
                    px = poslist[i][0];
                    py = poslist[i][1];
                    pz = (800*cos((i)))/(i+3);// -0.45*rad*rad;//rad;
                    gg=-pz*0.15;

                    if(style=="organic"){
                        // organic
                        translate([px,py,pz]) rotate([90-45,0,-rotlist[i+offs]])  sphere(r=rad,$fs=20);
                    }else if(style=="mechanic"){
                        // Mechanic
                        translate([px,py,pz])
                        rotate([90+gg,0,-rotlist[1+i+g]])
                        translate([0,0,-rad*1])
                        cylinder(r1=rad*1,r2=rad*0.6,h=rad*1.4,$fn=5);
                    }

                }
            }
        }
    }
    translate([0,0,-50]) cube([500,500,105], center = true);
}
if(headstyle=="organic"){
    // organic head
    color("Orange") translate([-10,0,30]) scale(1.2) octopushead_ball();
}else if(headstyle=="mechanic"){
    // mechanic head
    color("Orange") translate([-5,0,30]) scale(1.2) octopushead_punk();
}

module octopushead_punk(){
    rotate([0,-30,0])
    scale([2,1,1])
    randomRock(10,2,20);

    translate([-5,0,0]){
        rotate([0,-75,60]){
            difference(){
                cylinder(r=4,h=9);
                translate([0,0,7])
                cylinder(r=3,h=5);
            }
            translate([0,0,7]) sphere(r=3);
        }
        rotate([0,-70,-60]){
            difference(){
                cylinder(r=4,h=9);
                translate([0,0,7])
                cylinder(r=3,h=5);
            }
            translate([0,0,7]) sphere(r=3);
        }
    }

    rotate([0,15,0])
    translate([5,0,0])
    scale([2,2.75,2])
    randomRock(5,2,10);

}

module octopushead_ball(){
    difference(){
        hull(){
            translate([0,0,-2]) rotate([0,-20,0]) scale([0.5,0.5,0.5]) sphere(r=12);
            translate([15,0,5])
            scale([1,0.7,0.7]) sphere(r=18);
        }

    }
    translate([3, 4,5]) rotate([-25,0,0]) scale([1,1,0.75])sphere(r=6);
    translate([3,-4,5]) rotate([25,0,0]) scale([1,1,0.75]) sphere(r=6);
}

module randomRock(radius,corner_size,number_of_corners){
    // Draw rock
    hull(){
        // Make a hull..
        for(i=[0:number_of_corners]){
            // random position in 'sphere'
            y = rands(0,360,1)[0];
            z = rands(0,360,1)[0];
            rotate([0,y,z])

            // translate radius (minus half of corner size)
            translate([radius-corner_size*0.5,0,0])

            // draw cube as corner
            rotate([rands(0,360,1)[0],rands(0,360,1)[0],rands(0,360,1)[0]]) // random rotation
            cube(rands(corner_size*0.5,corner_size,1)[0],center = true);

            rotate([0,y,-z])

            // translate radius (minus half of corner size)
            translate([radius-corner_size*0.5,0,0])

            // draw cube as corner
            rotate([rands(0,360,1)[0],rands(0,360,1)[0],rands(0,360,1)[0]]) // random rotation
            cube(rands(corner_size*0.5,corner_size,1)[0],center = true);

        }
    }

    // Done!
}

// NOISE FUNCTIONS
// https://openscadsnippetpad.blogspot.com.es/2017/05/1-dimensional-noise.html
function single_noise_1d(i)=
let(
a=floor(i),
b=ceil(i),
c=smooth_curve(i-a),
arnd=rnd(1,0,a),
brnd=rnd(1,0,b),
out=lerp(arnd,brnd,c)
)
out
;

function  noise_1d(i,
low_range=1/4,mid_range=1,hi_range=8,
low_magnitude=1/2,mid_magnitude=0.25,hi_magnitude=0.5)=
 (
single_noise_1d(i/low_range)*low_magnitude+
single_noise_1d(i/mid_range)*mid_magnitude+
single_noise_1d(i/hi_range)*hi_magnitude

)/(low_magnitude+mid_magnitude+hi_magnitude);

function smooth_curve(a) =let (b = clamp(a))(b * b * (3 - 2 * b));
function clamp(a, b = 0, c = 1) = min(max(a, b), c);
function lerp(start, end, bias) = (end * bias + start * (1 - bias));
function rnd(a = 1, b = 0, s = []) =
  s == [] ?
   (rands(min(a, b), max(   a, b), 1)[0])
  :
   (rands(min(a, b), max(a, b), 1, s)[0])
  ;

```


[User]
I need to design a customizable pipe reducer for 3D printing. I'd like to be able to specify the inner or outer diameters for each end of the reducer, as well as the wall thickness, and heights of each section.

Specifically, the design should have three different modes:

1.  **Inner-to-Inner:** where I specify the *inner* diameter for both ends of the reducer.
2.  **Inner-to-Outer:** where I specify the *inner* diameter for one end and the *outer* diameter for the other.
3.  **Outer-to-Outer:** where I specify the *outer* diameter for both ends.

For each mode, I'll need to specify these parameters:

*   `Wall_Thickness`: The thickness of the walls (this should be a multiple of 0.4mm, for common 3D printing nozzle sizes, so I'd like to be able to pick from values like 1.2, 1.6, 2.0, etc.)
*   `Collet_A_Diameter`: The diameter of the first end.
*   `Collet_A_Height`: The height of the first collet.
*   `Reducer_Height`: The height of the sloped, reducing section between the collets.
*   `Collet_B_Diameter`: The diameter of the second end.
*   `Collet_B_Height`: The height of the second collet.

Could you create an OpenSCAD file (or files, if that makes more sense) that implements this? I'd prefer if the code uses named modules and isn't just one big block, so it's easier to understand. I don't think I need to include any external libraries for this.

[Assistant]
Simple_Pipe_Reducer.scad:
```
//Simple Pipe Reducer
//Copyright Paul Beyleveld
//31 Jul 2017
//This is a customizable reducer designed to be used for basic 3d printed pipe reducers.

// Specify inner or outer diameters for collets.
Type = "one"; // [one:Inner to Inner,two:Inner to Outer,three:Outer to Outer]

// Set wall thicknes (provides steps for 0.4mm extruder size)
Wall_Thickness = 1.6; // [1.2:0.4:8]

// Specify the diameter of the first collet (mm)?
Collet_A_Diameter = 30;

// Specify the height of the first collet(mm)?
Collet_A_Height = 18;

// Specify the desired height of the reducer (mm)?
Reducer_Height = 15;

// Specify the diameter of the second collet (mm)?
Collet_B_Diameter = 40;
// Specify the height of the second collet (mm)?
Collet_B_Height = 18;

/* [Hidden] */
fine = 250;

color("SteelBlue") { draw_reducer(); }

module draw_reducer() {
	if (Type == "one") {
		one();
	} else if (Type == "two") {
		two();
	} else if (Type == "three") {
		three();
	} else {
		one();
	}
}

//Inner to Inner - set inner diameter on both sides
module one() {

    difference () {
        union() {
            //Draw collet A
            cylinder (h = Collet_A_Height, d = Collet_A_Diameter+Wall_Thickness, center = false, , $fn=fine);
            // Draw reducer and move up by collet A height
            translate([0,0,Collet_A_Height]) { cylinder(h = Reducer_Height, d1 = Collet_A_Diameter+Wall_Thickness, d2 = Collet_B_Diameter+Wall_Thickness, center = false, $fn=fine); }
            // Draw collet B and move up by collet A and reducer height
            translate([0,0,Collet_A_Height+Reducer_Height]) { cylinder (h = Collet_B_Height, d = Collet_B_Diameter+Wall_Thickness, center = false, $fn=fine); }
        }

        union() {
            //Draw pipe cutout
            translate([0,0,-1]) { cylinder (h = Collet_A_Height+1.1, d = Collet_A_Diameter, center = false, $fn=fine); }
            translate([0,0,Collet_A_Height]) { cylinder(h = Reducer_Height, d1 = Collet_A_Diameter, d2 = Collet_B_Diameter, center = false, $fn=fine); }
            translate([0,0,Collet_A_Height+Reducer_Height-0.1]) { cylinder (h = Collet_B_Height+1.1, d = Collet_B_Diameter, center = false, $fn=fine); }
        }
    }

}

//Inner to Outer - set inner diameter on one side and outer diameter on the other
module two() {

   difference () {
        union() {
            //Draw collet A
            cylinder (h = Collet_A_Height, d = Collet_A_Diameter+Wall_Thickness, center = false, , $fn=fine);
            // Draw reducer and move up by collet A height
            translate([0,0,Collet_A_Height]) { cylinder(h = Reducer_Height, d1 = Collet_A_Diameter+Wall_Thickness, d2 = Collet_B_Diameter, center = false, $fn=fine); }
            // Draw collet B and move up by collet A and reducer height
            translate([0,0,Collet_A_Height+Reducer_Height]) { cylinder (h = Collet_B_Height, d = Collet_B_Diameter, center = false, $fn=fine); }
        }

        union() {
            //Draw pipe cutout
            translate([0,0,-1]) { cylinder (h = Collet_A_Height+1.1, d = Collet_A_Diameter, center = false, $fn=fine); }
            translate([0,0,Collet_A_Height]) { cylinder(h = Reducer_Height, d1 = Collet_A_Diameter, d2 = Collet_B_Diameter-Wall_Thickness, center = false, $fn=fine); }
            translate([0,0,Collet_A_Height+Reducer_Height-0.1]) { cylinder (h = Collet_B_Height+1.1, d = Collet_B_Diameter-Wall_Thickness, center = false, $fn=fine); }
        }
    }

}

//Outer to Outer - set outer diameter on both sides
module three() {

   difference () {
        union() {
            //Draw collet A
            cylinder (h = Collet_A_Height, d = Collet_A_Diameter, center = false, , $fn=fine);
            // Draw reducer and move up by collet A height
            translate([0,0,Collet_A_Height]) { cylinder(h = Reducer_Height, d1 = Collet_A_Diameter, d2 = Collet_B_Diameter, center = false, $fn=fine); }
            // Draw collet B and move up by collet A and reducer height
            translate([0,0,Collet_A_Height+Reducer_Height]) { cylinder (h = Collet_B_Height, d = Collet_B_Diameter, center = false, $fn=fine); }
        }

        union() {
            //Draw pipe cutout
            translate([0,0,-1]) { cylinder (h = Collet_A_Height+1.1, d = Collet_A_Diameter-Wall_Thickness, center = false, $fn=fine); }
            translate([0,0,Collet_A_Height]) { cylinder(h = Reducer_Height, d1 = Collet_A_Diameter-Wall_Thickness, d2 = Collet_B_Diameter-Wall_Thickness, center = false, $fn=fine); }
            translate([0,0,Collet_A_Height+Reducer_Height-0.1]) { cylinder (h = Collet_B_Height+1.1, d = Collet_B_Diameter-Wall_Thickness, center = false, $fn=fine); }
        }
    }

}
```


[User]
I'm looking to design a customizable wall-mounted hook using OpenSCAD. I want to be able to adjust several parameters to fit my specific needs. I'd like the design to be parametric, meaning I can easily change dimensions.

Here are the parameters I'm thinking of:

**Overall Hook Dimensions:**
*   `hookLength`: The total length of the hook along the wall.
*   `hookHeight`: The height of the part that attaches to the wall.
*   `hookDepth`: The distance the hook extends out from the wall.
*   `hookThickness`: The thickness of the main hook body (currently fixed in the example I have). This should control the thickness of the flat part against the wall, and the hooked portion.

**Hole Parameters:**
*   `holeCount`: The number of screw holes.
*   `holeDiameter`: The diameter of the screw holes.
*   `holeOffset`: The distance from the edges of the hook to the center of the screw holes. This offset should apply to the top/bottom edges as well as the sides for the first and last hole.
*   `holeTapered`: A boolean option (0 or 1) to control whether the screw holes are countersunk/tapered.

**Multiple Hooks:**
*   `hookCount`:  The number of separate hook units next to each other horizontally.
*   `hookDistance`: The spacing between each separate hook unit, center to center.

**Aesthetics:**
*   `roundCorners`: A boolean option (0 or 1) to control whether the hook has rounded corners. If this is enabled, the hook should get thicker by 2mm, but the edges should be rounded using `minkowski` and a sphere.

I'd like the hook to have a flat back for mounting against the wall, a flat top and a hook shape that extends outward. It would be ideal if you could manage that the hook part is also flat and not a rod/circle. When multiple hooks are used, a thin support structure should be in between the hooks but not between the wall and the first hook, nor after the last hook. I think this can be done by using the `difference` modifier on a cube.

It would be good if you generate the code in a single file, and please use descriptive variable names and comments for clarity. I don't need any external libraries for this.

[Assistant]
custom_hook.scad:
```
// length of the hook
hookLength = 63;

// height of the wall mounted part
hookHeight = 40;

// depth of the hook area
hookDepth = 23;

// number of holes
holeCount = 2; // [0:70]

// hole diameter
holeDiameter = 5;

// hole offset to the top and the sides of the hook
holeOffset = 12;

// activates the tapered holes
holeTapered = 1; // [0:No, 1:Yes]

// separated hook count
hookCount = 1;

// distance from hook to hook
hookDistance = 20;

// activate rounded Corners (the hook will get 2mm thicker) [EXPERIMENTAL]
roundCorners  = 0; // [0:No, 1:Yes]

holeRadius = holeDiameter / 2.;
holeRadiusCountersunk = holeRadius * 2;
holeDepthCountersunk = holeRadius * 1;
holeZ = hookHeight - holeOffset;

holeDistance = (hookLength - (2 * holeOffset)) /
(holeCount - 1);

hookSeperatorDistance = (hookLength - (hookDistance * (hookCount - 1))) / (hookCount);

module MyHook(){

    // set number of faces
    $fn=30;

    difference(){
        if(roundCorners){
            minkowski(){
                plainMultipleHook();
                sphere(1, centered=true, $fn=20);
            }
        }else{
            plainMultipleHook();
        }
        generateHoles();

    }
}

module plainMultipleHook(){
    difference(){
        plainHook();
        multipleHookSpacers();
    }
}

module plainHook(){
    union(){
        // upper
        cube([7,hookLength,hookHeight]);

        // lower
        translate([7,0,0]) cube([hookDepth ,hookLength,7]);
        // hook
        translate([7 + hookDepth ,0,0]) cube([7,hookLength,15]);

        // corners
        translate([2,0,9]) rotate([0,45,0]) cube([10,hookLength,6]);
        translate([hookDepth + 5 ,0,2]) rotate([0,-45,0]) cube([10,hookLength,6]);
   }
}

module multipleHookSpacers(){
    // seperator boxes
    if(hookCount >= 2){
        for(seperator = [1: hookCount - 1]){
            translate([13, seperator * hookSeperatorDistance + hookDistance * (seperator - 1), -1]) cube([hookDepth + 7, hookDistance, 17]);
        }
    }
}

module generateHoles(){
    if(holeCount == 1){
        holeYPosition = hookLength / 2;
        generateSingleHole(holeYPosition);
    }else{

        for(hole = [0: holeCount - 1]){
            holeYPosition = hole * holeDistance + holeOffset;
            generateSingleHole(holeYPosition);
        }
    }
}

module generateSingleHole(holeYPosition){
    translate([0, holeYPosition, holeZ]){

        // hole
        translate([-5,0,0])
        rotate([0,90,0])
        cylinder(22, holeRadius, holeRadius);

        // tapering
        if(holeTapered){
            translate([7 - holeDepthCountersunk, 0, 0])
            rotate([0,90,0])
            cylinder(3.1, holeRadius, holeRadiusCountersunk);

            translate([7.59, 0, 0])
            rotate([0,90,0])
            cylinder(10,holeRadiusCountersunk, holeRadiusCountersunk);
        }
    }
}

MyHook();
```


[User]
Okay, I need a custom coin generator. I'd like to be able to control a lot of the details about the coin, like its outer shape, inner hole, and add text on both sides. I'm thinking something parametric with OpenSCAD.

For the outer edge, I want to define the radius and shape. It would be nice to have an option to make it an ellipse rather than a circle, and have a parameter to control how elliptical it gets. I also want to be able to set the number of sides on the outer edge, which would basically make it a polygon, or a circle if the number of sides is high enough. Then, I'd like options for the outer border – whether it's a polygon, a custom shape (controlled by a "dent" parameter), or a star shape (2- or 3-regular). I need control over the width and height of this border as well, and the ability to rotate the border in steps of half a side. Finally, I'd like to be able to choose whether to have a bottom border, and if so, it should be bridged when printing.

For the inner hole, I would want a similar set of parameters: radius, elliptical shape, number of sides, border style (polygon, custom, or star), width and height of the inner border, and the ability to rotate it, similar to the outer border. Also, I want the option to only create the border around the inner hole without actually cutting the hole all the way through, and be able to offset the inner hole in the x and y directions.

Then, I need to add text. I want to put text on both the top and bottom of the coin, and two lines of text on each side. For each text, I should be able to define the text string, text size, font (I think it would be good to be able to choose different fonts like Helvetica, Times, etc. and different styles, like Bold or Italic) and an offset (X, Y, and also rotation). I want to also specify how many times to repeat the text around the coin.

Finally, I want to control the smoothness of the corners of both the outer and inner edges. I should be able to specify the number of subdivisions and a smoothing factor for both.

It would be great if the generated code used some helper functions to make things easier to understand, like functions for star shapes, ngon (for creating regular polygons), subdivision, smoothing, and averaging points.

Could you create all the necessary .scad files? I would prefer not to use any pre-existing libraries. I think all of this can be accomplished in a single file but if multiple files are required, that's fine.

[Assistant]
coin_factory.scad:
```
/* [Outer] */

//Outer radius of the coin, the size will be roughly 2 times this value depending on other settings.
outer_radius = 18;

//Forms an ellipse instead of a circle by playing this parameter
outer_radius_shape = 1;

//Height of the coin without borders
height = 1;

//The number of sides on the outer edge of the coin. Set to a very high value to make it circular. Values 2 and higher will create meaningful shapes.
outer_sides = 4;

//Type of the outer border. Not all star shapes can be 2 and 3 regular.
outer_mod = 2; //[0:Polygon, 1: Custom, 2: 2-regular star, 3: 3-regular star]

//This parameter controls the distance of the dents that makes the outer shape. Used if the type is set to Custom. Setting this value to 1 will make the shape a polygon.
outer_shape = 1;

//Width of the outer border, set 0 to disable. If outer border is disabled and inner border is enabled, part will either need support or bottom_border should be disabled as well.
outer_border = 1.6;

//Height of the outer borders. Keep inner and outer borders are synchronized, otherwise the part will need support.
outer_border_height = 0.5;

//Rotates the outer border in multiples of half sides
outer_rotation = 0.5;

//Whether to create bottom border. If the settings check out, the bottom part will be bridged. If you have trouble printing the part, or changed border settings to a point where bridging is not possible, then disabling this might help.
bottom_border = 1;//[1:Yes,0:No]

/* [Inner] */

//Radius of the inner hole, excluding the inner border. Set 0 to disable.
inner_radius = 3;

//Forms an ellipse instead of a circle by playing this parameter
inner_radius_shape = 1.3;

//Sides of the inner hole of the coin. Set to a very high value to make it circular. Values 2 and higher will create meaningful shapes.
inner_sides = 5;

//Type of the inner border. Not all star shapes can be 2 and 3 regular.
inner_mod = 2; //[0:Polygon, 1: Custom, 2: 2-regular star, 3: 3-regular star]

//This parameter controls the distance of the dents that makes the inner shape. Used if the type is set to Custom. Setting this value to 1 will make the shape a polygon.
inner_shape = 0.98;

//Radius of the border around the hole, set 0 to disable. If inner border is disabled, outer border is enabled and the inner radius is non-zero, part will either need support or bottom_border should be disabled as well.
inner_border = 3;

//Height of the inner border in terms of the outer border height. Keep this value 1 or disable bottom_border, otherwise the part will need support.
inner_border_height = 1;

//Rotates the inner border in multiples of half sides
inner_rotation = -0.5;

//Only add a border for innersection, no
inner_border_only = 0;//[1:Yes,0:No]

//Offset the inner hole sideways
inner_offset_x = 0;

//Offset the inner hole up and down
inner_offset_y = 0;

/* [Top text] */
//The text that will be displayed on top of the coin, remember to change bottom text as they are not the same.
top_text = "";

//Second text is rendered below the first one, it will be offset the same amount as the first but to the other direction. Thus if the offset is 0, they will be on top of each other.
second_top_text = "";

//Size of the text, roughly its height
text_size = 5;

//Size of the second text, roughly its height
second_text_size = 4;

//Offset of the text away from the center. Negative offsets work.
text_offset_y = 6;

//Offset of the second text away from the center. Negative offsets work.
second_text_offset_y = -.5;

//Offset of the text to the sideways
text_offset_x = -8;

//Offset of the second text to the sideways
second_text_offset_x = -8;

//How many times the text will be repeated around the coin
text_repeat = 2;

/* [Bottom text] */
//The text that will be displayed on top of the coin
bottom_text = "";

//Second text is rendered below the first one, it will be offset the same amount as the first but to the other direction. Thus if the offset is 0, they will be on top of each other.
second_bottom_text = "";

//Size of the text, roughly its height
bottom_text_size = 4;

//Size of the second text, roughly its height
second_bottom_text_size = 4;

//How many times the text will be repeated around the coin
bottom_text_repeat = 8;

//Offset of the text away from the center. Negative offsets work.
bottom_text_offset_y = 12;

//Offset of the second text away from the center. Negative offsets work.
second_bottom_text_offset_y = 0;

//Offset of the text to the sideways
bottom_text_offset_x = 0;

//Offset of the second text to the sideways
second_bottom_text_offset_x = 0;

/* [Text settings] */

//Height of the text in terms of outer border
text_height = 1;

//Font that will be used to render the text
text_font = "Nunito Sans"; //[Helvetica,Times,Oxygen,Lobster,Pacifico,Nunito Sans,Roboto Mono,Anton,Cabin,Bree Sherif,Cairo,Source Serif Pro,Kanit,Josefin Slab,Cinzel,Julius Sans One,Russo One,Concert One,Orbitron,Kaushan Script,Katibeh,Alfa Slab One,Audiowide,Luckiest Guy,Sigmar One,Press Start 2P,Bowlby One SC,Sedgwick Ave Display,Baloo Chettan,Candal,Carter One,Jockey One,Rammetto One,Bungee Inline,Titan One,Slackey,Lemon,Germania One,Ranchers,Caesar Dressing]

text_style = 1; //[0:Regular, 1:Bold, 2:Italic, 3: Bold Italic]

//rotates the text around, this is per half rotations
text_rotation = 0;

//rotates the text around, this is per half rotations
second_text_rotation = 0;

/* [Smoothing] */
//Divides the lines in the outer edge of the coin, this allows smoothing to smooth locally. Set 1 to not to divide lines. Increase both subdivisions and smooth to make rounded corners softer.
outer_subdivisions = 40;

//Smooths the corners in the outer edge. Set 0 to remove smoothing. Increase to enlarge the effect of smoothing. Generally you should keep this value less then outer subdivisions. If the values are equal you will have a circle.
outer_smooth = 3;

//Divides the lines in the inner edge of the coin, this allows smoothing to smooth locally. Set 1 to not to divide lines. Increase to make rounded corners softer. Increase both subdivisions and smooth.
inner_subdivisions = 7;

//Smooths the corners in the inner edge. Set 0 to remove smoothing. Increase to enlarge the effect of smoothing. Generally you should keep this value less then inner subdivisions. If the values are equal you will have a circle.
inner_smooth = 2;

/* [hidden] */

function pmod(v, mod) = v%mod < 0 ? v%mod + mod : v%mod;

function subdivide(in, times) =
    let(inlen = len(in))
    [for(i=[0:inlen-1]) for(j=[0:times-1])
        (in[pmod(i+1, inlen)] - in[i]) * j/times + in[i]
    ]
;

function sum(in, p, to) = p == to+1 ? [for(i=in[0]) 0] : sum(in, p+1, to) + in[pmod(p, len(in))];

function average(in, from, to) = sum(in, from, to) / (to - from + 1);

function smooth(in, n) =
    let(inlen = len(in))
    [for(i=[0:inlen-1])
        average(in, i-n, i+n)
    ]
;

function star(r_out, r_in, sides, shape = 1, angle_off = 0) =
    let(a = 360 / (sides*2))
    [for(i = [0:(sides*2-1)])
        let(rx = i%2 ? r_out : r_in, ry = i%2 ? r_out - r_in + (r_in * shape) : r_in * shape)
        [cos(a*i+angle_off) * rx, sin(a*i+angle_off) * ry]];

function ngon(r, sides) = star(r, r, sides / 2);

function star_inner(sides, mod, custom) =
    mod   == 0  ? cos(180/sides) :
    mod   == 1  ? custom * cos(180/sides) :
    sides == 5  ? 0.5 * sqrt(3 - sqrt(5)) :
    sides == 6  ? sqrt(3) / 3 :
    sides == 8  ? (
             mod == 2 ? sqrt(2 - sqrt(2))
                      : sin(22.5*3) - sin(22.5) ):
    sides == 10 ? (
             mod == 2 ? sqrt( (5+sqrt(5)) / 10 )
                      : sqrt(5 - 2*sqrt(5)) ):
    sides == 12 ? (
             mod == 2 ? sqrt(2) * (3-sqrt(3)) / 2
                      : sqrt(6) / 3 ):
    custom
;

difference() {
    //rotate([0, 0, outer_rotation * 360 / outer_sides / 2])
    linear_extrude(
        height = height + outer_border_height + bottom_border * outer_border_height,
        convexity=8)
    polygon(smooth(subdivide(
        star(outer_radius,
             outer_radius * star_inner(outer_sides, outer_mod, outer_shape),
             outer_sides, outer_radius_shape, outer_rotation * 360 / outer_sides / 2
        )
    , outer_subdivisions), outer_smooth));

    outer_border_shape = 1 +
        ((outer_radius_shape - 1) * outer_radius) / (outer_radius - outer_border);

    //rotate([0, 0, outer_rotation * 360 / outer_sides / 2])
    translate([0,0,height + (bottom_border * outer_border_height) + 0.1])
    linear_extrude(height = outer_border_height + 0.1, convexity=8)
    polygon(smooth(subdivide(
        star(outer_radius - outer_border,
             (outer_radius - outer_border) *
                star_inner(outer_sides, outer_mod, outer_shape),
             outer_sides, outer_border_shape, outer_rotation * 360 / outer_sides / 2
        )
    , outer_subdivisions), outer_smooth));

    if(bottom_border) {
        //rotate([0, 0, outer_rotation * 360 / outer_sides / 2])
        translate([0,0,-0.1])
        linear_extrude(height = outer_border_height + 0.1, convexity=8)
        polygon(smooth(subdivide(
            star(outer_radius - outer_border,
                 (outer_radius - outer_border) *
                    star_inner(outer_sides, outer_mod, outer_shape),
                 outer_sides, outer_border_shape, outer_rotation * 360 / outer_sides / 2
            )
        , outer_subdivisions), outer_smooth));
    }

    inner_border_shape = 1 +
        ((inner_radius_shape - 1) * inner_radius) / (inner_radius - inner_border);

    if(inner_radius > inner_border && !inner_border_only) {
        translate([inner_offset_x,inner_offset_y,0])
        //rotate([0, 0, inner_rotation * 360 / inner_sides / 2])
        translate([0,0,-0.1])
        linear_extrude(
            height = height + outer_border_height * inner_border_height * 2 + 0.2,
            convexity=8)
        polygon(smooth(subdivide(
            star(inner_radius - inner_border,
                 (inner_radius - inner_border) *
                    star_inner(inner_sides, inner_mod, inner_shape),
                 inner_sides, inner_border_shape, inner_rotation * 360 / inner_sides / 2
            )
        ,inner_subdivisions),inner_smooth));
    }
}

if(inner_radius > 0)
difference() {
    inner_border_shape = 1 +
        ((inner_radius_shape - 1) * inner_radius) / (inner_radius - inner_border);

    translate([inner_offset_x,inner_offset_y,0])
    //rotate([0, 0, inner_rotation * 360 / inner_sides / 2])
    linear_extrude(
        height = height + outer_border_height * inner_border_height + bottom_border *
        outer_border_height * inner_border_height,
        convexity=8)
    polygon(smooth(subdivide(
        star(inner_radius,
             inner_radius * star_inner(inner_sides, inner_mod, inner_shape),
             inner_sides, inner_radius_shape, inner_rotation * 360 / inner_sides / 2
        )
    ,inner_subdivisions),inner_smooth));

    if(inner_radius > inner_border) {
        translate([inner_offset_x,inner_offset_y,0])
        //rotate([0,0, inner_rotation * 360 / inner_sides / 2])
        translate([0,0,-0.1])
        linear_extrude(height = height + outer_border_height * inner_border_height * 2 + 0.2, convexity=8)
        polygon(smooth(subdivide(
            star(inner_radius - inner_border,
                 (inner_radius - inner_border) *
                    star_inner(inner_sides, inner_mod, inner_shape),
                 inner_sides, inner_border_shape, inner_rotation * 360 / inner_sides / 2
            )
        ,inner_subdivisions),inner_smooth));
    }
}

text_stylenames = ["", ":style=Bold", ":style=Italic", ":style=Bold Italic"];

font_string = str(text_font, text_stylenames[text_style]);

ang = 360 / text_repeat;
for(i=[0:text_repeat-1]) {

    rotate([0,0,(i+text_rotation/2)*ang])
    translate([text_offset_x, text_offset_y, text_height * outer_border_height + height - 0.1])
    linear_extrude(height = text_height * outer_border_height + 0.1)
    text(text = top_text, size = text_size,
         font = font_string,
         halign = "center", valign = "center");

    rotate([0,0,(i+second_text_rotation/2)*ang])
    translate([second_text_offset_x, -second_text_offset_y, text_height * outer_border_height + height - 0.1])
    linear_extrude(height = text_height * outer_border_height + 0.1)
    text(text = second_top_text, size = second_text_size,
         font = font_string,
         halign = "center", valign = "center");
}

bang = 360 / bottom_text_repeat;
for(i=[0:bottom_text_repeat-1]) {
    rotate([0,0,(i+text_rotation/2)*bang])
    translate([-bottom_text_offset_x, bottom_text_offset_y, 0])
    mirror(1,0,0)
    linear_extrude(height = text_height * outer_border_height + 0.1)
    text(text = bottom_text, size = bottom_text_size,
         font = font_string,
         halign = "center", valign = "center");

    rotate([0,0,(i+second_text_rotation/2)*bang])
    translate([-second_bottom_text_offset_x, -second_bottom_text_offset_y, 0])
    mirror(1,0,0)
    linear_extrude(height = text_height * outer_border_height + 0.1)
    text(text = second_bottom_text, size = second_bottom_text_size,
         font = font_string,
         halign = "center", valign = "center");

}

```


[User]
Hey, I'm looking to design a magnetic cable holder that I can stick to the side of my metal bed frame. I have a design in mind but need some help turning it into an OpenSCAD model. I need it to be parametric so I can easily adjust it for different magnet and cable sizes in the future.

Here are the key parameters:

*   **Magnet Diameter:** I'll be using disc magnets, so I need to specify the diameter of the magnet.
*   **Magnet Thickness:** The thickness of the magnet is also important.
*   **Cable Diameter:** The diameter of the cable that the holder will manage.
*   **Bottom Thickness:**  The thickness of the base layer that will hold the magnet. This can be a small, fixed value.
*   **Cover Thickness:** The thickness of the top layer covering the magnet.
*   **Top Clearance:** A small clearance between the top cover and the magnet, to ensure easy assembly.

The holder should essentially be a circular base with a cavity for the magnet and a channel for the cable. The cable channel should run perpendicularly to the magnet and be large enough to hold the cable. I'd prefer that the magnet be completely covered, and that there is a lip to hold the cable securely.

For more context, I'm using a 12.5 mm diameter, 3mm thick neodymium magnet, and my cable is around 7mm in diameter. I would like it to be able to be mounted on metal.

I'm thinking I might want to use a mirror function to create the shape.

Could you generate an OpenSCAD file for this? I don't need any special libraries or anything.

[Assistant]
Cable_Magnet.scad:
```
// Diameter of your magnet
Magnet_Diameter = 12.5;

// Thickness of your magnet
Magnet_Thickness = 3;

// Diameter of your cable
Cable_Diameter = 7;

// Thickness of the bottom layer holding the magnet. The default should be fine.
Bottom_Thickness = 0.4;

// Thickness of top cover. The default should be fine.
Cover_Thickness = 2;

// Increase clearance if the two parts can't fit, reduce if it's too loose.
Top_Clearance = 0.5;

/* [Hidden] */
$fs = 1;
$fa = 6;

Magnet_Radius = Magnet_Diameter / 2;
Cable_Radius = Cable_Diameter / 2;

module copy_mirror(vec=[0,1,0]) {
 union() {
  children();
  mirror(vec) children();
 }
};

difference() {
    union() {
        cylinder(r=Magnet_Radius+1, h=Magnet_Thickness+Bottom_Thickness);
        difference() {
            cylinder(r=Magnet_Radius+2, h=Magnet_Thickness+Bottom_Thickness+Cover_Thickness+1+Top_Clearance);
            copy_mirror([1,0,0]) translate([3,-(Magnet_Diameter+6)/2,0]) cube([Magnet_Radius+3, Magnet_Diameter+6, Magnet_Thickness+Bottom_Thickness+Cover_Thickness+1+Top_Clearance]);
        }
    }
    translate([0,0,Bottom_Thickness]) cylinder(r=Magnet_Radius, h=Magnet_Thickness+Cover_Thickness+1+Top_Clearance);
    translate([0,0,Magnet_Thickness+Bottom_Thickness]) cylinder(r=Magnet_Radius+1, h=Cover_Thickness+Top_Clearance);
}

//color("green") translate([0,0,Magnet_Thickness+Bottom_Thickness]) {
color("green") translate([Magnet_Diameter+5,0,0]) {
    difference() {
        intersection() {
            union() {
                cylinder(r=Magnet_Radius+1, h=Cover_Thickness);
                translate([-(Magnet_Diameter+2)/2, -(Cable_Diameter+2)/2, 0]) cube([Magnet_Diameter+2, Cable_Diameter+2, (Cable_Diameter+1)/2]);
                translate([0,0,Cable_Radius]) rotate([0,90,0])cylinder(r=Cable_Radius+1, h=Magnet_Diameter+2, center=true);
            }
            cylinder(r=Magnet_Radius+1, h=Cable_Diameter+1);
        }
        translate([-(Magnet_Diameter+2)/2, -Cable_Radius, 0]) cube([Magnet_Diameter+2, Cable_Diameter, (Cable_Diameter+1)/2]);
        translate([0,0,Cable_Radius]) rotate([0,90,0])cylinder(r=Cable_Radius, h=Magnet_Diameter+2, center=true);
        translate([0,0,-1]) cylinder(r=Magnet_Radius+1, h=1);
    }
}
```


[User]
Hey, I'm looking to create a parametric CNC dial indicator collar for my CNC machine, similar to the one described in the text you provided. I need it to be adjustable for different spindle sizes and mounting configurations.

Here's a breakdown of what I'm after:

**Core Collar:**

*   A central cylindrical collar that clamps around the spindle.
*   The inner diameter of the collar needs to be parametrically adjustable based on the spindle diameter. I'll call this `spindle_dia`. It should have a default value of 65.2mm but I'll need to be able to change it.
*   The wall thickness of the collar should also be parametric. I'll call this `wall_Thick`, with a default of 5mm.
*   The height of the collar needs to be adjustable too, called `collar_height`, with a default of 40mm.

**Cinch Mechanism:**

*   There should be a cinch tab on the side of the collar to allow tightening around the spindle.
*   It needs a cutout for the cinch to operate and a hole for a tightening bolt.
*  I need to be able to adjust the length of the tab, let's call this `cinch_tab_length`, with a default of 50mm. It should also be adjustable with a constant depth of 15mm.

**Mounting Arms:**

*   **X/Y Mounts:** Two mounting arms extending outwards on the X/Y plane, positioned on opposite sides of the collar. These should attach to the collar using an oblong shape with a through hole on each end.
    *   I need the length of these arms to be adjustable, call this `x_length`, with a default of 90mm
    *   The width of the mounting arm should also be parametric as `mount_width`, but I'd like to stick with the value 18mm by default and not plan to change it.
    *   I need a cylindrical support under the x mount, attached to the main collar. The length should match the `x_length`, the diameter 10mm, and the position of the cylinder should be offset by 10mm vertically.
*   **Z Mount:** A single mounting arm that extends in the Z direction. This one also needs an oblong shape with a through hole on each end to mount.
    *   The length needs to be parametric as `z_length` with a default of 20mm
    *   The width of this mounting arm should be the same `mount_width` as the X/Y arms.

**Holes and Cutouts:**

*   The cinch mechanism needs a rectangular cutout on the collar, and the bolt hole needs to be 6.4mm in diameter.
*   The mount arms also need through holes for attachment, also 6.4mm in diameter.

**Other considerations:**

* I'd like to be able to control the `fn` value for curves.
*   Everything should be centered at the origin.
*   I would like all the variables exposed as customizer parameters.
*   I'm not looking to use any libraries for this project.

Could you generate the OpenSCAD code to achieve this? Thanks!

[Assistant]
CNC_Indicator_Collar_v3.scad:
```
/* Open SCAD Name.: CNC_Indicator_Collar_v1.scad
*  Copyright (c)..: 2017 www.DIY3DTech.com
*
*  Creation Date..: 08/03/2017
*  Description....: Collar CNC Dial Indicator
*
*  Rev 1: Develop Model
*  Rev 2:
*
*  This program is free software; you can redistribute it and/or modify
*  it under the terms of the GNU General Public License as published by
*  the Free Software Foundation; either version 2 of the License, or
*  (at your option) any later version.
*
*  This program is distributed in the hope that it will be useful,
*  but WITHOUT ANY WARRANTY; without even the implied warranty of
*  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
*  GNU General Public License for more details.
*  This version is for non-comerical use only.
*/

/*------------------Customizer View-------------------*/

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

/*---------------------Parameters---------------------*/

//Dia of Spindle in mm (0.2mm is for contraction)
spindle_dia     =   65.2;//[50.2:1:75.2]

//Wall Thickness in mm
wall_Thick      =    5;//[3:1:5]

//Height of collar in mm
collar_height   =   40;//[40:1:50]

//Lengeth of x/y mount in mm
x_length       =    90;//[100:2:200]

//Lengeth of z mount in mm
z_length        =   20;//[10:1:30]

//Mount width in mm (do not recommend changing)
mount_width     =   18;//[18:1:20]

/*-----------------------Execute----------------------*/

main_module();

/*-----------------------Modules----------------------*/

module main_module(){ //create module
    difference() {
            union() {//start union

                //crreate main body of collar
                translate ([0,0,0]) rotate ([0,0,0]) cylinder(collar_height,(spindle_dia+wall_Thick)/2,(spindle_dia+wall_Thick)/2,$fn=60,true);

                //create cinch tab
                translate ([spindle_dia/2,0,0]) rotate ([0,0,0]) cube([50,15,collar_height],true);

                //create x mounts
                translate ([-((spindle_dia+wall_Thick)/2)+(mount_width/2),-((spindle_dia+wall_Thick))+(spindle_dia/4),(collar_height/2)-2.5]) rotate ([0,0,0]) oblong(mount_width,x_length,5,0,6.4,true);

                //create x support
                translate ([-((spindle_dia+wall_Thick)/2)+(mount_width/2),-((spindle_dia+wall_Thick))+(spindle_dia/4)+10,(collar_height/2)-5]) rotate ([90,90,0]) cylinder(x_length,10/2,10/2,$fn=60,true);

                //create z mount
                translate ([(spindle_dia+mount_width+14)/2,5,-z_length-2.5]) rotate ([90,0,0])oblong(18,(z_length+collar_height),5,0,6.4,true);

                    } //end union

    //start subtraction of difference

                //Differance center of collar
                translate ([0,0,0]) rotate ([0,0,0]) cylinder(collar_height*2,(spindle_dia)/2,(spindle_dia)/2,$fn=60,true);

                //create opening for cinch
                translate ([spindle_dia/2,0,0]) rotate ([0,0,0]) cube([52,5,collar_height+2],true);

                //create hole for cinch bolt
                translate ([(spindle_dia+25)/2,0,0]) rotate ([90,0,0]) cylinder(20,6.4/2,6.4/2,$fn=60,true);

    } //end difference
}//end module

module oblong(dia,len,tall,hole_1,hole_2,center){
    difference() {
        union() {
            //create base oblong structure
            cube([dia,len,tall], center);
            translate ([0,len/2,0]) {cylinder(tall,dia/2,dia/2,$fn=60, center);
            }
            translate ([0,-len/2,0]) {cylinder(tall,dia/2,dia/2,$fn=60, center);
            }
        } //end union
     //if hole is greater than zero, remove hole otherwise do nothing
     if (hole_1>0) {
        translate ([0,len/2,-1]) {cylinder(tall+3,hole_1/2,hole_1/2,$fn=60, center);
        }}
        if (hole_2>0) {
        translate ([0,-len/2,-1]) {cylinder(tall+3,hole_2/2,hole_2/2,$fn=60, center);
        }}
    } //end differance
}//end module

/*----------------------End Code----------------------*/
//translate ([0,0,0]) rotate ([0,0,0]) cylinder(5,3,3,true);
//translate ([0,0,0]) rotate ([0,0,0]) cube([18,18,18],true);
//translate ([0,0,0]) sphere($fn = 0, $fa = 12, $fs = 2, r = 1);
//translate ([0,0,0]) rotate ([0,0,0]) rounded (15,15,1,1,true);
```


[User]
I'm looking to create a customizable knuckle grip for a GoPro, similar to the one I saw on Thingiverse. It should have a few adjustable parameters:

1.  **Number of Finger Rings:** I want to be able to specify how many finger rings it has, ideally between 1 and 4.
2.  **Finger Ring Diameter:** Each ring's diameter should be adjustable, probably in the range of 20-28mm.
3.  **Palm Bar:** I need an option to include or exclude a palm bar for extra grip.

The design should also include a GoPro-compatible mount, specifically a triple-arm mount like in the original design. I don't think I need to customize the mount itself, but it does need to be included. It should be designed to accommodate an M5 lock nut.

I need the OpenSCAD code to be parametric so I can easily tweak these settings. I'd prefer a clean and well-organized design, and I'd like it to take into account that these kinds of parts are typically 3D printed, so overhangs should be minimized where possible.

I do not want to use any libraries except for OpenSCAD's built in functions.

[Assistant]
custom_grip.scad:
```
/* [grip parameters] */
//number of finger rings
fingers = 4;   //[1, 2, 3, 4]
//finger ring diameter
fingerWidth = 22; //[20:1:28]
// include palm bar
palmBar = "no";   //[yes, no]

/* [hidden] */
$fn = 40;
x = 0; y = 1; z = 2;
height = 7;
thick = 3;
width = [fingerWidth, fingerWidth, fingerWidth, .82*fingerWidth];
xOffset = [0, 4, 2, -13];
radius = 2;
scaleX = thick / height;

module fcylinder(ht, x1, xScale, yScale, rad) {
   minkowski() {
      scale([xScale, yScale, 1])
      cylinder(h=ht-2*rad, d1=x1-2*rad, center=true);
         sphere(rad, center=true);
   }
}
module fcube(wi, de, he, rad) {
   minkowski() {
      cube([wi-2*rad, de-2*rad, he-2*rad], center=true);
      sphere(r=rad);
   }
}
module torus(ht, innerD) {
   rotate_extrude(convexity = 10)
      translate([innerD/2+ht*scaleX/2, 0, 0])
         scale([scaleX, 1])
            circle(d=ht);
}
translate([0, -30.8, 0])
   gopro_connector("triple");
hull() {
   translate([0, -width[0]/2-3.8, 0])
      scale([1, 1, .4])
         rotate([90, 0, 0])
            fcylinder(7, 14.7, 1, 1, radius);
   translate([0, -18, 0])
      cube([14.7, 4, 14.7], center=true);
}
for ( n=[0:1:fingers-1]) {
   yOffset = (n==3) ? (width[0]+thick)*n-6 : (width[0]+thick)*n;
   translate([xOffset[n], yOffset, 0])
      torus(height, width[n]);
}

// crossbar
crossbarXOffset = -width[0]/2-thick/2-14/2;
if ( palmBar == "yes" )
   translate([crossbarXOffset, 0, 0])
      rotate([90, 0, 90])
         scale([.75, 1, 1])
            cylinder(h=14, d=7, center=true);
// palm bar
palmBarXOffset = -width[0]/2-thick-14+3.5;
if ( palmBar == "yes" )
   union() {
      hull() {
         translate([palmBarXOffset, 0, 0])
            sphere(d=height, center=true);
         translate([palmBarXOffset-4, 1.7*width[0], 0])
            scale([1, 3, 1])
            sphere(d=height, center=true);
      }
      hull() {
         translate([palmBarXOffset-4, 1.7*width[0], 0])
            scale([1, 3, 1])
           sphere(d=height, center=true);
         translate([palmBarXOffset, 3.4*width[0], 0])
            sphere(d=height, center=true);
      }
   }
// The gopro connector itself (you most probably do not want to change this but for the first two)

// The locking nut on the gopro mount triple arm mount (keep it tight)
gopro_nut_d= 9.2;
// How deep is this nut embossing (keep it small to avoid over-overhangs)
gopro_nut_h= 2;
// Hole diameter for the two-arm mount part
gopro_holed_two= 5;
// Hole diameter for the three-arm mount part
gopro_holed_three= 5.5;
// Thickness of the internal arm in the 3-arm mount part
gopro_connector_th3_middle= 3.1;
// Thickness of the side arms in the 3-arm mount part
gopro_connector_th3_side= 2.7;
// Thickness of the arms in the 2-arm mount part
gopro_connector_th2= 3.04;
// The gap in the 3-arm mount part for the two-arm
gopro_connector_gap= 3.1;
// How round are the 2 and 3-arm parts
gopro_connector_roundness= 1;
// How thick are the mount walls
gopro_wall_th= 3;

gopro_connector_wall_tol=0.5+0;
gopro_tol=0.04+0;

// Can be queried from the outside
gopro_connector_z= 2*gopro_connector_th3_side+gopro_connector_th3_middle+2*gopro_connector_gap;
gopro_connector_x= gopro_connector_z;
gopro_connector_y= gopro_connector_z/2+gopro_wall_th;
module gopro_connector(version="double", withnut=true, captive_nut_th=0, captive_nut_od=0, captive_rod_id=0, captive_nut_angle=0)
{
	module gopro_profile(th)
	{
		hull()
		{
			gopro_torus(r=gopro_connector_z/2, rnd=gopro_connector_roundness);
			translate([0,0,th-gopro_connector_roundness])
				gopro_torus(r=gopro_connector_z/2, rnd=gopro_connector_roundness);
			translate([-gopro_connector_z/2,gopro_connector_z/2,0])
				cube([gopro_connector_z,gopro_wall_th,th]);
		}
	}
	difference()
	{
		union()
		{
			if(version=="double")
			{
				for(mz=[-1:2:+1]) scale([1,1,mz])
						translate([0,0,gopro_connector_th3_middle/2 + (gopro_connector_gap-gopro_connector_th2)/2]) gopro_profile(gopro_connector_th2);
			}
			if(version=="triple")
			{
				translate([0,0,-gopro_connector_th3_middle/2]) gopro_profile(gopro_connector_th3_middle);
				for(mz=[-1:2:+1]) scale([1,1,mz])
					translate([0,0,gopro_connector_th3_middle/2 + gopro_connector_gap]) gopro_profile(gopro_connector_th3_side);
			}

			// add the common wall
			translate([0,gopro_connector_z/2+gopro_wall_th/2+gopro_connector_wall_tol,0])
				cube([gopro_connector_z,gopro_wall_th,gopro_connector_z], center=true);

			// add the optional nut emboss
			if(version=="triple" && withnut)
			{
				translate([0,0,gopro_connector_z/2-gopro_tol])
				difference()
				{
					cylinder(r1=gopro_connector_z/2-gopro_connector_roundness/2, r2=11.5/2, h=gopro_nut_h+gopro_tol);
					cylinder(r=gopro_nut_d/2, h=gopro_connector_z/2+3.5+gopro_tol, $fn=6);
				}
			}
		}
		// remove the axis
		translate([0,0,-gopro_tol])
			cylinder(r=(version=="double" ? gopro_holed_two : gopro_holed_three)/2, h=gopro_connector_z+4*gopro_tol, center=true, $fs=1);
	}
}
module gopro_torus(r,rnd)
{
	translate([0,0,rnd/2])
		rotate_extrude(convexity= 10)
			translate([r-rnd/2, 0, 0])
				circle(r= rnd/2, $fs=0.2);
}

```