[User]
Okay, I need a parametric OpenSCAD design for a phone tripod mount, kind of like the one I've described but with more customization options. Basically, it needs a quick-release shoe that fits into a standard tripod head, a platform for the phone to rest on, some posts that slide into the upper part that holds the phone, and a backrest to keep the phone from sliding out the back. A hair tie will secure the phone on the platform.

Here's a breakdown of what I'm looking for:

**Base/Tripod Shoe:**

*   The base needs to be a quick-release shoe, 41mm wide at its base. I need to be able to change this easily in the code; I want a variable for the base width at the bottom, and a variable for its inner width.
*   The height or thickness of the base should be adjustable via a variable.
*   It needs to have a "lip" on the back, that the phone will butt up against.

**Platform:**

*   The platform should be a square and its width should be a variable, `plat_w`.
*   The thickness of the platform should also be adjustable via a variable, `plat_h`.
*   The platform needs to have a slot and space for a hair tie or rubber band to wrap around the phone.

**Posts:**

*   Two posts, one on each side of the phone, that slide into the upper part of the mount.
*   The height and width of these posts need to be configurable variables, `post_h` and `post_w`.
*   These posts should have rounded edges.

**Backrest:**

*   The backrest will be behind the phone on the base platform.
*   The backrest needs adjustable variables for its width, height, and spacing from the posts, `br_w`, `br_h`, and `br_s`, respectively.
* The backrest should also have a rounded slot for the hair tie to pass through.

**Other Variables:**

*   `phone_thick`: the thickness of the phone, or phone+case.
*   `band_w`: the width of the band (hair tie)
*  `hole_clearance`: how much extra space should be around the slidey posts where they insert into the upper part.
*   All dimensions should be in millimeters.

I'd like to use rounded rectangles for most of the shapes for a smoother look, and I think using the `minkowski()` function with a `circle()` will achieve this. I would like to use the `hull()` function in some places to smooth transitions.

I would prefer that the design uses the `rotate()` and `translate()` functions to position the different parts. I think that will make it easier to understand what is happening in the code. It would also be helpful if there are some comments in the code to help me follow along, and it would be best if it was broken up into modular sections with comments so I can easily make future changes. I'm assuming the final OpenSCAD code will not use any specific libraries beyond those that are built into OpenSCAD itself. Also, I don't need any hard-coded supports since I plan to use my printer's built-in support generation. I don't need any test parts either, but thank you.

[Assistant]
phone_tripod_clip.scad:
```

// -- VARIABLES ---
//height or thickness of the clip/shoe in mm
clip_base = 41;
//inner/upper measurement of the clip/shoe in mm
clip_in = 33;
//height or thickness of the clip/shoe in mm
clip_h = 9;
//width [side of square] of the platform, in mm
plat_w = 50;
//height or thickness of the platform, in mm
plat_h = 12;
//height or length of the slidey posts, in mm
post_h = 105;
//width or thickness of the slidey posts, in mm
post_w = 4;
// "backrest width", mm
br_w = 6;
// "backrest height", mm
br_h = 25;
// "backrest spacing", mm
br_s = 4;
// width of the band (hair tie), in mm
band_w = 4;
//thickness of the phone, in mm (14 should be OK for most phones/cases)
phone_thick = 14;
//make this number larger if the slidey posts are too snug in the slidey post holes
hole_clearance = 0.55;
band_r = band_w/2;
//if you prefer my hard-coded supports to those of your printer software, uncomment the supports section below
support_th = 0.6;

module round_rect(w, l, r){
	translate([-(w-2*r)/2, -(l-2*r)/2, 0])minkowski(){
		square([w-2*r, l-2*r]);
		circle(r, $fn=16);
	}
}

// -- BASE ---
translate([-br_s-post_h, 0, 0])
	union(){
        //backstop
		hull(){
			translate([0, -(plat_w/2+post_w)/2, 0])
				cube([br_h, plat_w/2+post_w, post_w+br_s]);
			translate([-band_w, -plat_w/4-post_w/2, post_w+br_s+br_w-(br_w-band_w)])
				cube([br_h + band_w, plat_w/2+post_w, br_w-band_w]);
		}
		difference(){
			translate([-plat_h, 0, plat_w/2]){
                //clip-shoe
				rotate([0, 270, 0])
					linear_extrude(height=clip_h, scale=[clip_base/clip_in, clip_base/clip_in])
						round_rect(clip_in,clip_in,3);
				rotate([0, 90, 0]){
                    //Base
					linear_extrude(height=plat_h)
						round_rect(plat_w, plat_w, 5);
                    // LIP
                    difference(){
                        translate([plat_w/2-(post_w+br_s+br_w)-(phone_thick+band_w), -plat_w/2, 0])cube([phone_thick+band_w, plat_w, plat_h+band_w]);
                        translate([band_w,-plat_w/2,plat_h])cube([plat_w/3,plat_w/8,band_w*2]);
                        translate([band_w,plat_w/2-plat_w/8,plat_h])cube([plat_w/3,plat_w/8,band_w*2]);
                        hull(){
                            translate([plat_w/2-phone_thick-band_w,-plat_w/2,plat_h+band_w])
                            rotate([-90,0,0])
                            cylinder(r=band_w, h=plat_w, $fn=32);
                            translate([plat_w/2-phone_thick*2+band_w,-plat_w/2,plat_h+band_w])
                            rotate([-90,0,0])
                            cylinder(r=band_w, h=plat_w, $fn=32);
                        }
                    }
                    hull(){
                        translate([plat_w/2-(post_w+br_s+br_w)-(phone_thick+band_w), -plat_w/2, 0])cube([1, plat_w, plat_h+band_w]);
                        translate([-plat_w/2+5,plat_w/2-5,plat_h-1])cylinder(r=5, h=1);
                        translate([-plat_w/2+5,-plat_w/2+5,plat_h-1])cylinder(r=5, h=1);
                    }
				}
			}
			difference(){
				translate([plat_h+1, 0, (phone_thick + br_w + band_r*6)/2 + post_w + br_s])
					rotate([0, 270, 0])
						linear_extrude(height=band_w*2+plat_h)
							round_rect(phone_thick+br_w+band_r*6, plat_w/2+post_w+band_w*3.5, band_r);
				for (i=[-1,1]){
					translate([-band_w*2, i*plat_w*sqrt(2)/2, -plat_w*sqrt(2)/2+(phone_thick + br_w + band_r*6) + post_w + br_s])
						rotate([45, 0, 0])
							cube([band_w*2+plat_h+2, plat_w, plat_w]);
				}
			translate([0, 0, br_s + post_w + br_w])
				hull(){
					translate([-band_w, 0, band_r + phone_thick])
						rotate([0, 90, 0])
							cylinder(h=band_w*3, r=band_r, $fn=12);
						translate([-band_w, -plat_w/4 - post_w/2, 0])
							cube([band_w*3, plat_w/2 + post_w, 0.1]);
				}
			}
		}
        //POST
		for (i=[1,-1]){
			translate([0, -post_w/2 + i*plat_w/4, 0])cube([post_h, post_w, post_w]);
		}
        translate([0,0,post_w])rotate([0,90,0])cylinder(r=post_w, h=post_h, $fn=32);
        difference(){
            translate([0,-plat_w/4,0])cube([post_h, plat_w/2, post_w*0.5]);
            for (i=[1,-1]){
                hull(){
                    translate([post_h-post_w*1.5,i*(plat_w/8+post_w/4),0])cylinder(r=(plat_w/4 - post_w*1.5)/2, h=post_w, $fn=24);
                    translate([br_h+post_w*1.5,i*(plat_w/8+post_w/4),0])cylinder(r=(plat_w/4 - post_w*1.5)/2, h=post_w, $fn=24);
                }
            }
        }
	}

// -- base supports ---
//translate([-plat_h-br_s-post_h-clip_h,0,0]){
//    difference(){
//        translate([0,-21,0])cube([8,40,8]);
//        for (i = [-21:6:21]){
//            translate([0,i,0])cube([clip_h-1-support_th,3-support_th,clip_h-1]);
//            translate([support_th,i-3,0])cube([clip_h-1-support_th,3-support_th,clip_h-1]);
//        }
//        translate([clip_h, 0, plat_w/2 - 0.05])
//        rotate([0, 270, 0])
//        linear_extrude(height=clip_h, scale=[clip_base/clip_in, clip_base/clip_in])
//        round_rect(clip_in,clip_in,3);
//    }
//}

// -- TOP --
difference(){
	union(){
        difference(){
            hull(){
                translate([br_s+(phone_thick+band_r+br_w)/2, 0, 0])
                    linear_extrude(height=br_w)
                        round_rect(phone_thick+band_r+br_w, plat_w/2 + post_w, band_r);
                // ---lip
                translate([br_s, -(plat_w/2 + band_w)/2, br_w+band_w-1])
                    cube([phone_thick+band_r, plat_w/2 + band_w, 1]);
            }
            hull(){
                translate([br_s+phone_thick-band_r,-plat_w/4-band_r,br_w+band_w])rotate([-90,0,0])cylinder(h=plat_w/2+band_w, r=band_w, $fn=24);
                translate([br_s+band_w*1.5,-plat_w/4-band_r,br_w+band_w])rotate([-90,0,0])cylinder(h=plat_w/2+band_w, r=band_w, $fn=24);
            }
        }

        //backrest
		translate([br_s + band_r + phone_thick, 0, (br_w+br_h)/2])
			rotate([0, 90, 0])
				linear_extrude(height=br_w)
					round_rect(br_w+br_h, plat_w/2 + post_w, band_r);
        //slothouse
		translate([(br_w*2+br_s*2 + post_w)/2+br_s+band_r+phone_thick, 0, 0])
			linear_extrude(height=br_w+br_h-band_r)
				round_rect(br_s*2 + post_w, plat_w/2 + post_w+band_w, band_r);
	}
    // slide holes
	for (i=[1,-1]){
		translate([br_s*2+band_r+phone_thick+br_w-0.5, -(post_w+1)/2 + i*plat_w/4, -5])
			cube([post_w+hole_clearance, post_w+hole_clearance, post_h]);
	}
    translate([br_s*2+band_r+phone_thick+br_w-0.5+post_w/2, -plat_w/4, -5])cube([post_w/2+hole_clearance,plat_w/2,post_h]);
    translate([br_s*2+band_r+phone_thick+br_w-0.425,0,-5])cylinder(r=post_w+hole_clearance/2, h=post_h, $fn=32);

    // Band Slot
	translate([br_s+band_r*2.5+phone_thick, 0, 0])
		rotate([90,0,0])translate([0,band_r/2,-(br_h+br_w)/2])cylinder(r=band_r, h=br_h+br_w, $fn=24);
}
```


[User]
I'm looking to create a 3-way joint system for 3D printing, and I'd like the design to be parametric so I can easily adjust the dimensions for different projects. Specifically, I need three identical pieces that interlock to form a stable 3-way connection, like a 'T' but with an extra leg.

Each piece should have a main rectangular shaft, and at the end of the shaft, the interlocking mechanism will be some type of mortise/tenon arrangement. I'd like to be able to specify:

*   **`width`**: the width of the square shaft.
*   **`height`**: the height of the main, solid part of the shaft before the interlocking feature starts.
*   **`tolerance`**: a tolerance value, probably a small number, which will be used to create a gap so the pieces will fit together nicely without excessive filing after printing. It should be incorporated into the mortise/tenon connections.

Essentially, the final assembly should look like three pieces meeting at a point, and each piece should be identical so that they can be manufactured in multiples. Can you create the appropriate OpenSCAD code with the customizable parameters as described above? I don't need any extra features like fillets/chamfers for now, just the basic interlocking joint. Also, please make sure that the code is well-commented for clarity.

[Assistant]
3way_joint_plus_tolerance_V2.scad:
```
//this is the user inputed width of the square shaft
width=9;
//this is the user inputed height of the solid shaft (not including the joint)
height=12;
//this is the user inputed tolerance. may be printer specific. incorporating about 0.01" gap works well on my Makerbot Replicator
tolerance=0.01;

module joint(width, height){
    cube([width, width, height]);
    translate([0,0,height]){cube([width/3-tolerance/2,width, width/3]);}
    translate([0,width/3+tolerance/2,height+width/3]){
        cube([width/3-tolerance/2,width/3-tolerance,2*width/3]);}
    translate([2*width/3+tolerance/2,width/3+tolerance/2,height]){
        cube([width/3-tolerance/2,width/3-tolerance,width]);}

}

module piece1(width, height1){
    joint(width,height1);
}

piece1(width,height);
```


[User]
I need a way to connect two panels of different thicknesses while keeping one face of both panels aligned. It's like a clip that grabs both panels, but doesn't center them. I've got this simple design in mind, but I'd like the OpenSCAD code to be parametric so I can adjust it easily.

Specifically, I need to be able to control:

*   **clip\_length:** The overall length of the clip.
*   **clip\_thickness:** The minimum wall thickness of the clip itself.
*   **clip\_height:**  The height of the clip, essentially how far up it extends on the panels.
*   **clip\_gap1:** The width of the gap for the thicker panel.
*   **clip\_gap2:** The width of the gap for the thinner panel.

The design should basically create a 'U' shape, but with different depths for the two 'legs' of the U. One 'leg' should have a gap of `clip_gap1`, and the other should have a gap of `clip_gap2`. The back of the U should be positioned so the panels are flush on one side. It'll also need a divider down the center to separate the two panel slots.

Could you generate an OpenSCAD file that does this? I don't need any external libraries for it. I've included an example of the clip from an older project, but I'm starting over with this.

[Assistant]
horiz-clip-v2.scad:
```
//   Horizontal clip to pinch two materials of different thicknesses
//   R. Lazure  February 2017
//
//  Keeps a common face of both materials inline
//   i.e. does not center the materials relative to one another
//
//   The HClip2 module is a modification of WilliamAAdams' Yazzonic Panel Clips
//   http://www.thingiverse.com/thing:5208
//
///// inputs ////////////////
// How long?
clip_length = 25.4;  //[15:50]
//
// Minimum wall thickness?
clip_thickness = 2;  //[1:5]
//
// height ?
clip_height = 15; //[10:50]
//
// largest gap width?
clip_gap1 = 3; //[2:10]
//
// smallest gap width?
clip_gap2 = 2; //[2:10]
//
 /* [Hidden] */

gDefaultExtent = clip_length/2;
gGap1 = clip_gap1;
gGap2 = clip_gap2;
gDefaultThickness = clip_thickness;
gDefaultLength = clip_height;

HClip2(gDefaultLength, gDefaultExtent, gDefaultThickness, gGap1, gGap2);

module HClip2(length, extent, thickness, gap1, gap2)
// for 2 different widths
// RLazure added January 11, 2017
{
	difference()
	{
		// full block size
		translate([-extent-thickness/2, 0,0])
		cube(size=[thickness+extent*2, gap1+2*thickness, length]);

        union ()
        {
        // gap1 section
		color("red")translate([-extent-thickness/2-1, thickness,-1])
		cube(size=[thickness+extent+1, gap1+0.25, length+2]);

        // gap2 section
        color("blue")translate([thickness/2-1, thickness,-1])
		cube(size=[thickness+extent+1, gap2+0.6, length+2]);
        }
        }
		// divider wall along y-axis
		color("green")translate([-thickness/2, thickness-1, 0])
		cube(size=[thickness, gap1+thickness+0.25, length]);

}

```


[User]
I'd like to create a customizable dog tag that I can 3D print. I'd like it to be bone-shaped with my pet's name and my phone number on it. The bone shape should be formed by two cylinders on each side connected by a rectangular center section.

Here's the specific things I'd need to be able to control:

*   **`bone_height`**: This is the thickness of the dog tag, and it should apply to all parts of the bone shape.
*   **`pet_name`**: This is the pet's name which should be printed on the center part of the bone.
*   **`phone_number`**: This is my phone number to be printed under the name.
*   **`font_height`**: This should allow me to set the height of both the name and phone number text. I'm okay with the phone number having a smaller font than the name, and for the text to be printed on the bone, but I'd like these to be able to be controlled using variables.
*   **Attachment hole**: There needs to be a hole on the left of the bone to attach a keyring.

I would like this to be completely parametric. I'm thinking it would be best if everything was constructed relative to the origin. Could you make the OpenSCAD file for me? I'm not really sure how to approach this.

[Assistant]
DogTag2.scad:
```

pet_name="NAME"; //Your pet name
phone_number="000-0000000"; //Your phone number
bone_height = 5; //Tag height in mm
font_height=2; //Font height in mm

module t(t){
 translate([-1,(-len(t)*3.8),bone_height])
   rotate([0, 0, 90])
    linear_extrude(height = font_height)
      text(t, 10, $fn = 16);
}
module t2(t){
 translate([-1,(-len(t)*3.8),bone_height])
   rotate([0, 0, 90])
    linear_extrude(height = font_height)
      text(t, 7, $fn = 16);
}

//bone
//left side of bone
translate([-10,-30,0])
{
    translate([20,0,0]) cylinder(h=bone_height, r=14);
    cylinder(h=bone_height, r=14);
};
//right side of bone
translate([-10,30,0])
{
    translate([20,0,0]) cylinder(h=bone_height, r=14);
    cylinder(h=bone_height, r=14);
};
//center of bone
translate([-15,-25,0]) cube([30,50,bone_height]);
translate([0,-5,0])
t(pet_name);
translate([11,14,0]) t2(phone_number);

//tag attachment
difference(){
    translate([-16,0,0]) cylinder(r=6, h=bone_height);
    //prevents non-manifold
    translate([-16,0,-1]) cylinder(r=3, h=((bone_height)+2));
}

```


[User]
I need a parametric OpenSCAD module for generating various sizes of V-slot aluminum extrusion profiles. I'd like to be able to specify the profile shape and the length, and the module should generate the correct 3D model. The available shapes are: "20x20", "20x40", "20x60", "20x80", "40x40", and "C-beam".

I want a single module called `V_slot(shape, length)` that handles generating all the different shapes. The `shape` parameter will be a string, and `length` should be a number. For example, calling `V_slot("20x40", 53.2)` should generate a 20x40 profile that's 53.2 units long.

I expect that the code to generate this will be organized in a single file that can be included in other SCAD files. For each type of V-Slot, there is a 'center' section in the middle, edge 'corner' pieces, and 'raccord' pieces that transition between the center and edges. 'C-beam' has an additional 'inner corner' piece. The center, corner, raccord, and inner_corner pieces are also defined as modules within the same file for reuse within the V_slot module.

[Assistant]
V-slot_customizer.scad:
```
shape="20x20";//[20x20,20x40,20x60,20x80,40x40,C-Beam]
lenght=10;

//////////////
$fn=60;
module center() {
    difference() {

        intersection() {
            translate([0,0,0.5]) cube([7.79,7.79,1],center=true);
            cylinder(d=13.5,h=3,center=true,$fn=4);
        }

        cylinder(d=4.2,h=3,center=true);
        for(i=[0:90:270]) rotate([0,0,i]) translate([7.2425,0,0]) rotate([0,0,45]) cube(5,center=true);
    }
}

module corner() {
    difference() {
        translate([5.5,5.5,0]) cube([3,3,1]);
        translate([5.5+1.07,5.5+1.07,-0.5]) cube([3,3,2]);
    }
    translate([3,3,0])rotate([0,0,45]) translate([0,-0.75,0]) cube([5.8,1.5,1]);
    difference() {
        hull() {for(i=[0,1],j=[0,1]) translate([i*8.5,j*8.5,0]) cylinder(d=3,h=1);}
        for(i=[0,90]) rotate([0,0,i]) translate([12.45,0,0]) rotate([0,0,45]) cube(10,center=true);
        cube(16.4,center=true);
    }
}

module raccord() {
    translate([-10,0,0]) {
        difference() {
            translate([0,8.2,0]) cube([20,1.8,1]);
            for(i=[0,20]) translate([i,12.45,0]) rotate([0,0,45]) cube(10,center=true);
        }
        translate([10,0,0]) for(i=[-1,1]) scale([i,1,1]) translate([5.39868/2,10-1.8-1.96,0]) cube([1.8,2,1]);
         for(i=[0,1]) translate([i*20,0,0]) rotate([0,0,i*90]) translate([3,3,0])rotate([0,0,45]) translate([0,-0.75,0]) cube([5.33205,1.5,1]);
    }
}

module inner_corner() {
    difference() {
        union() {
            translate([10,0,0]) raccord();
            translate([0,10,0]) rotate([0,0,-90]) raccord();
        }
        translate([0,0,-0.5]) cube([11,8.2,3]);
        translate([0,0,-0.5]) cube([8.2,11,3]);
    }
    translate([3,3,0])rotate([0,0,45]) translate([0,-0.75,0]) cube([9,1.5,1]);
}

module V_slot(shape,lenght) {
scale([1,1,lenght]) {
    if (shape=="20x20") {
            center();
            for(i=[0:90:270]) rotate([0,0,i]) corner();
        }

    else if (shape=="20x40") {
            for(i=[-1,1]) translate([i*10,0,0]) center();
            for(i=[-1,1]) scale([1,i,1]) raccord();
            for(j=[-1,1]) scale([j,1,1]) translate([10,0,0]) for(i=[0,-90]) rotate([0,0,i]) corner();
        }

    else if (shape=="20x60") {
            for(i=[-1,0,1]) translate([i*20,0,0]) center();
            for(i=[-1,1]) scale([1,i,1]) for(i=[-1,1]) translate([i*10,0,0]) raccord();
            for(j=[-1,1]) scale([j,1,1]) translate([20,0,0]) for(i=[0,-90]) rotate([0,0,i]) corner();
        }

    else if (shape=="20x80") {
            for(i=[-3,-1,1,3]) translate([i*10,0,0]) center();
            for(i=[-1,1]) scale([1,i,1]) for(i=[-1,0,1]) translate([i*20,0,0]) raccord();
            for(j=[-1,1]) scale([j,1,1]) translate([30,0,0]) for(i=[0,-90]) rotate([0,0,i]) corner();
        }

    else if (shape=="40x40") {
            for(i=[0:90:270]) rotate([0,0,i]) {
                translate([10,10,0]) center();
                translate([0,10,0]) raccord();
                translate([10,10,0]) corner();
            }
        }

    else {

        for(i=[-3,-1,1,3]) translate([i*10,-10,0]) center();
        for(i=[-3,,3]) translate([i*10,10,0]) center();

        scale([1,-1,1]) for(i=[-1,0,1]) translate([i*20,10,0]) raccord();
        for(i=[-90,90]) rotate([0,0,i]) translate([0,30,0]) raccord();
        translate([0,-10,0]) raccord();

        for(j=[-1,1]) scale([j,1,1]) translate([30,-10,0]) rotate([0,0,-90]) corner();
        for(j=[-1,1]) scale([j,1,1]) translate([30,10,0]) for(i=[0,90]) rotate([0,0,i]) corner();

        for(j=[-1,1]) scale([j,1,1]) translate([-30,-10,0]) inner_corner();

    }
}

}

V_slot(shape,lenght);

```
V-slot_lib.scad:
```
//EXEMPLES use V_slot(shape,lenght);
//V_slot("20x20",10);
//V_slot("20x40",20);
//V_slot("20x60",30);
//V_slot("20x80",40);
//V_slot("40x40",20);
//V_slot("C-beam",10);
//////////////
$fn=60;
module center() {
    difference() {

        intersection() {
            translate([0,0,0.5]) cube([7.79,7.79,1],center=true);
            cylinder(d=13.5,h=3,center=true,$fn=4);
        }

        cylinder(d=4.2,h=3,center=true);
        for(i=[0:90:270]) rotate([0,0,i]) translate([7.2425,0,0]) rotate([0,0,45]) cube(5,center=true);
    }
}

module corner() {
    difference() {
        translate([5.5,5.5,0]) cube([3,3,1]);
        translate([5.5+1.07,5.5+1.07,-0.5]) cube([3,3,2]);
    }
    translate([3,3,0])rotate([0,0,45]) translate([0,-0.75,0]) cube([5.8,1.5,1]);
    difference() {
        hull() {for(i=[0,1],j=[0,1]) translate([i*8.5,j*8.5,0]) cylinder(d=3,h=1);}
        for(i=[0,90]) rotate([0,0,i]) translate([12.45,0,0]) rotate([0,0,45]) cube(10,center=true);
        cube(16.4,center=true);
    }
}

module raccord() {
    translate([-10,0,0]) {
        difference() {
            translate([0,8.2,0]) cube([20,1.8,1]);
            for(i=[0,20]) translate([i,12.45,0]) rotate([0,0,45]) cube(10,center=true);
        }
        translate([10,0,0]) for(i=[-1,1]) scale([i,1,1]) translate([5.39868/2,10-1.8-1.96,0]) cube([1.8,2,1]);
         for(i=[0,1]) translate([i*20,0,0]) rotate([0,0,i*90]) translate([3,3,0])rotate([0,0,45]) translate([0,-0.75,0]) cube([5.33205,1.5,1]);
    }
}

module inner_corner() {
    difference() {
        union() {
            translate([10,0,0]) raccord();
            translate([0,10,0]) rotate([0,0,-90]) raccord();
        }
        translate([0,0,-0.5]) cube([11,8.2,3]);
        translate([0,0,-0.5]) cube([8.2,11,3]);
    }
    translate([3,3,0])rotate([0,0,45]) translate([0,-0.75,0]) cube([9,1.5,1]);
}

module V_slot(shape,lenght) {
scale([1,1,lenght]) {
    if (shape=="20x20") {
            center();
            for(i=[0:90:270]) rotate([0,0,i]) corner();
        }

    else if (shape=="20x40") {
            for(i=[-1,1]) translate([i*10,0,0]) center();
            for(i=[-1,1]) scale([1,i,1]) raccord();
            for(j=[-1,1]) scale([j,1,1]) translate([10,0,0]) for(i=[0,-90]) rotate([0,0,i]) corner();
        }

    else if (shape=="20x60") {
            for(i=[-1,0,1]) translate([i*20,0,0]) center();
            for(i=[-1,1]) scale([1,i,1]) for(i=[-1,1]) translate([i*10,0,0]) raccord();
            for(j=[-1,1]) scale([j,1,1]) translate([20,0,0]) for(i=[0,-90]) rotate([0,0,i]) corner();
        }

    else if (shape=="20x80") {
            for(i=[-3,-1,1,3]) translate([i*10,0,0]) center();
            for(i=[-1,1]) scale([1,i,1]) for(i=[-1,0,1]) translate([i*20,0,0]) raccord();
            for(j=[-1,1]) scale([j,1,1]) translate([30,0,0]) for(i=[0,-90]) rotate([0,0,i]) corner();
        }

    else if (shape=="40x40") {
            for(i=[0:90:270]) rotate([0,0,i]) {
                translate([10,10,0]) center();
                translate([0,10,0]) raccord();
                translate([10,10,0]) corner();
            }
        }

    else {

        for(i=[-3,-1,1,3]) translate([i*10,-10,0]) center();
        for(i=[-3,,3]) translate([i*10,10,0]) center();

        scale([1,-1,1]) for(i=[-1,0,1]) translate([i*20,10,0]) raccord();
        for(i=[-90,90]) rotate([0,0,i]) translate([0,30,0]) raccord();
        translate([0,-10,0]) raccord();

        for(j=[-1,1]) scale([j,1,1]) translate([30,-10,0]) rotate([0,0,-90]) corner();
        for(j=[-1,1]) scale([j,1,1]) translate([30,10,0]) for(i=[0,90]) rotate([0,0,i]) corner();

        for(j=[-1,1]) scale([j,1,1]) translate([-30,-10,0]) inner_corner();

    }
}

}

```


[User]
Hey, I'm looking to design a cam lock cover for some Ikea-style furniture, and I'm hoping you can help me out with a parametric OpenSCAD file. Basically, the cover needs to have a circular cap that sits on the surface and a cross-shaped peg that press-fits into the cam lock.

Here's what I'm envisioning:

*   **Cap:** A circular disc that covers the cam lock. I need to be able to adjust its diameter and thickness.
*   **Cross-Peg:** A cross shape that extends from the back of the cap. This cross needs to be adjustable in terms of the total depth, thickness of each arm, and the width of the rectangular "arms".
*   **Parametric Design:** Everything should be easily adjustable via parameters so I can tweak it to fit different cam lock sizes without needing to do any weird transformations or manually change numbers for the components.

I'd really like to be able to change these parameters:

*   `cap_diameter`: Diameter of the circular cap.
*   `cap_depth`: Thickness/depth of the circular cap.
*   `cross_depth`: Total depth of the cross-shaped peg.
*   `cross_thickness`: Thickness of each of the 'arms' of the cross.
*   `cross_height`: Height of one of the cross pieces.
*   `cross_width`: Width of the other cross piece.

The whole design should be centered on the Z axis, so when printed, the cover sits right on top.  Ideally, it'd also be nice if it used the BOSL2 library. I think it would be easier to parameterize this way.

[Assistant]
camcover-v01.scad:
```
/*  Cam lock cover for Ikea & other cheap furniture
    Russell Salerno 2/7/2017
*/

$fn=120;

crossDepth = 3.5;
crossThickness = 1.2;
crossHeight = 8.9;
crossWidth = 6.4;

capDepth = 0.8;
capDia = 14.7;

translate([0, 0, capDepth]) linear_extrude(crossDepth) square([crossThickness, crossHeight], center=true);
translate([0, 0, capDepth]) linear_extrude(crossDepth) square([crossWidth, crossThickness], center=true);
linear_extrude(capDepth) circle(d=capDia, center=true);
```


[User]
I'd like to design a fully parametric fidget spinner in OpenSCAD. I want it to be a "nuclear" style spinner, with arms extending from a central body, each ending in a bearing mount. It should use standard 608 bearings, and I need to be able to adjust the arm length, the number of arms, the cut angle of the arms where they connect to the center, the center radius, and the distance between the bearings and the walls around them.

Specifically, I'm envisioning these parameters:

*   **arm\_distance**: The length from the center of the spinner to the center of the outer bearing (adjustable, default 39mm).
*   **number\_of\_arms**: How many arms the spinner has (adjustable, default 3 for a tri-spinner, values 2-5 supported).
*   **tab\_extra\_angle**:  An extra angle to add when cutting the tabs where the arms meet the center (adjustable, default 5 degrees).
*   **center\_r**: The radius of the center grip ring (adjustable, default 7mm).
*   **bearing\_distance\_to\_wall**: The gap between the outer bearing and the wall of the bearing mount (adjustable, default 2mm).
*  **printer\_threshold**: A small offset to account for printer tolerances in the bearing holes (adjustable, default 0.15).
*   **chanfer**: A boolean parameter on whether to include chamfers (default "true" or false).
*   **chamfer\_unit**: If chamfers are enabled, this is the size of the chamfer (adjustable, default 1.5 mm).
*   **arm\_fn**: A rendering detail setting to control the smoothness of the curves.

I'd also like two modes: one for printing the calibration piece for the bearing, and one for printing the main body. I'll need a way to switch between them using a `part` variable.

The 608 bearing dimensions are fixed within the design as:
 * **bearing\_dia** = 22mm + printer\_threshold\*2 (diameter)
 * **bearing\_inner\_dia** = 8mm (inner diameter)
 * **bearing\_thickness** = 7.2mm (thickness)

The design should:

1.  Create a central cylinder (optionally chamfered).
2.  Cut holes for the central bearing and each of the outer bearings.
3. Create the cut-out tabs that make the arms distinct.
4.  Create a separate calibration piece with just the outer bearing hole, to check printer fit.
5. Use the `Chamfer.scad` library to create chamfers if enabled, found here: [https://github.com/SebiTimeWaster/Chamfers-for-OpenSCAD/releases](https://github.com/SebiTimeWaster/Chamfers-for-OpenSCAD/releases).

[Assistant]
Nuclear_Spinner.scad:
```
/*=========================================
Program Name :	EDC Nuclear Spinner
Base Language:	English
Created by   :	Esmarra
Creation Date:  08/02/2017
Rework date entries:
Program Objectives:
Observations:
	You Will Need Chamfer library installed:
		http://www.thingiverse.com/thing:1305888
		https://github.com/SebiTimeWaster/Chamfers-for-OpenSCAD/releases

Special Thanks:
	@SebiTimeWaster for is lib
=========================================*/

include <Chamfers-for-OpenSCAD/Chamfer.scad>;

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

// Set Detail (Rendering:40 Printing:120)
arm_fn = 40 ;  // [40,120]

// Which one would you like to see?
part = "cal_bearing"; // [cal_bearing:Bearing Calibration,final:Main Body]

/* [Spinner] */
// How long do you want the arm to be?
arm_distance= 39 ; // [38:50]
//Default 39

// How manny arms?
number_of_arms = 3 ; //[2:5]
// Tri-Spinner -> 3

// Set Cut Angle
tab_extra_angle = 5 ;
// Default 5

// Center Radius Grip Ring
center_r = 7 ;
// Default 7

// Outter Bearing Distance to Wall
bearing_distance_to_wall= 2 ;
//Default 2

// To Use Chanfer Donwload Nuclear_Spinner.scad and open on PC
chanfer = "true" ; // [ture,false]

// Set Chamfer Unit
chamfer_unit=1.5 ;

/* [Printer] */
// If your Calibration doesn't fit increase this. Else descreasing untill you get a tight fit.
printer_threshold= 0.15 ;
// My Printer 0.21

/* [Bearing] */
// #### 608 Bearing Settings ####
bearing_dia=22+printer_threshold*2 ;
bearing_inner_dia= 8 ;
bearing_thickness=7.2 ;
// ===== #### =====

/* [Hidden] */
angle=360/number_of_arms;
tab_angle = 360/number_of_arms - 60 -tab_extra_angle ;
main_angle_z=angle/2 ; // Set Zero angle
arm_length=arm_distance-bearing_distance_to_wall-bearing_dia/2 ; // Work Arround arm distance
extra_cut=100 ; // IF THE CUT BUGGS INCREASE THIS
$fn=arm_fn;
/* ====== */

//=======  MAIN  =======

//cal_bearing();
//final();
print_part();

//======= Modules =======
module bearing(){
	cylinder(d=bearing_dia,h=bearing_thickness+2,center=true,$fn=arm_fn); // Bearing
}

module cal_bearing(){
	difference(){
		cylinder(d=bearing_dia+2,bearing_thickness,center=true,$fn=arm_fn); // Shell
		cylinder(d=bearing_dia,bearing_thickness+2,center=true,$fn=arm_fn); // Bearing
	}
}

module bearing_holes(){
	bearing(); // Center Bearing Hole
	for (i = [1:number_of_arms]){
		rotate([0,0,angle*i])translate([arm_length,0,0])bearing(); // Arm Bearing Hole
	}
}

module cut_tab(){
    hull(){
        rotate([0,0,main_angle_z-tab_angle/2])translate([(arm_distance+extra_cut)/2,0,0]) cube([arm_distance+extra_cut,0.1,bearing_thickness+1],center=true);
        rotate([0,0,main_angle_z+tab_angle/2 ])translate([(arm_distance+extra_cut)/2,0,0])cube([arm_distance+extra_cut,0.1,bearing_thickness+1],center=true);
    }
}

module final(){
	difference(){
		union(){
			if(chanfer=="true")translate([0,0,-bearing_thickness/2])chamferCylinder(bearing_thickness, arm_distance,arm_distance,chamfer_unit);
			else cylinder(r=arm_distance,h=bearing_thickness,center=true,$fn=arm_fn); //Main Body
		}
		union(){
			bearing_holes();
			for (i = [1:number_of_arms]){
				rotate([0,0,angle*i])cut_tab();
			}
		}
	}

	difference(){
		if(chanfer=="true")translate([0,0,-bearing_thickness/2])chamferCylinder(bearing_thickness, (bearing_dia+center_r)/2,(bearing_dia+center_r)/2,chamfer_unit);
		else cylinder(d=bearing_dia+center_r,h=bearing_thickness,center=true,$fn=arm_fn);
		bearing_holes();
	}

}

module print_part() {
	if (part == "cal_bearing") cal_bearing();
	else final();
}

```


[User]
I need a parametric OpenSCAD design for a pegboard hook. I'd like to be able to customize a few key things, and it should support both common types of pegboards.

First, there are two types of pegboard, which I'll call "A" and "B". Type A has 1/8 inch holes, and Type B has 1/4 inch holes. The design should be able to handle either.

Second, the hook part has a bend. I need to be able to specify:
  *   `BendAngle`: the angle of the bend, from straight out to straight up, in degrees.
  *   `BendRadius`: the radius of the bend itself, in millimeters.
  *   `Gape`: This is the distance from the base to the start of the hook's bend, in millimeters.
  *   `Throat`: The vertical distance from the lowest point of the gape to the height of the end of the hook, in millimeters.

I'd also like to control the resolution of circles and spheres using the `$fn` variable.

The pegboard has fixed hole spacing of 1 inch. For Type A pegboards, the hole diameter is 3/16", and for Type B it's 1/4".

I want to be able to center the object. If the center flag is enabled, I would like the origin point to be centered within the bounding box of the entire model in x and y directions, otherwise the origin point should be at the pegboard wall, in x and y directions.

I'm also working in millimeters, so all dimensional units should be in mm.

The design should be a single module that will create the hook using the `BendAngle`, `BendRadius`, `Gape`, `Throat`, `PegBoardType`, and `center` variables, in addition to `$fn`.

I don't require any additional libraries for this.

[Assistant]
Customizable_Peg_board_Hook_v1.1.scad:
```
// preview[view:south east, tilt:top]

// - There are two types of peg board, they vary in thickness and hole size.
PegBoardType = "A"; //[A:Type A (1/8" holes),B:Type B (1/4" holes)]

// degrees - This angles the point from straight out to straight up.
BendAngle = 90; //[0:90]

// millimeters - This defines the radius of the bend from the shank (the wall) to the point.
BendRadius = 10; //[0:100]

// millimeters - Not a true gape (gap), this is the distance from the shank (the wall) to the bend in the hook.
Gape = 10; //[0:100]

// millimeters - The throat (bite) is the measure in millimeters from the lowest point in the gape(gap)to the height of the point.
Throat = 10; //[0:100]

// Circle/Sphere resolution
$fn = 40;

// millimeters - The peg board thickness, either 1/8" or 1/4"
pbt = PegBoardType == "A" ? 3.175 : 6.35;

// millimeters - The hole spacing is fixed at 1" for either type of peg board
hs = 25.4 * 1;

// millimeters - The hole diameter, either 3/16" or 1/4"
hd = ( PegBoardType == "A" ? 4.7625 : 6.35 ) - 1;

// millimeters - The hole radius, half the diameter.
hr = hd/2;

//To support pre 2016 versions of OpenSCAD
module rotateExtrude(angle=360, convexity=12) {
    difference() {
        rotate_extrude(angle=angle, convexity=convexity)
        //rotate_extrude(convexity=convexity)
            children();

        if( version_num() < 20161004 ) {
            render()
                union(){

            dim = max(Gape,Throat)+hd;

            //NE
            if(angle < 90) {
                rotation = angle > 0 ? angle : 0;

                rotate([0,0,rotation])
                    translate([0,0,-dim/2])
                        cube([dim,dim,dim]);
            }

            //SE
            if(angle < 360) {
                rotation = angle > 270 ? angle-270 : 0;

                difference() {
                    rotate([0,0,rotation])
                        translate([0,-dim,-dim/2])
                            cube([dim,dim,dim]);

                    cube([dim,dim,dim]);
                }
            }

            //SW
            if(angle < 270) {
                rotation = angle > 180 ? angle-180 : 0;

                rotate([0,0,rotation])
                    translate([-dim,-dim,-dim/2])
                        cube([dim,dim,dim]);
            }

            //NW
            if(angle < 180) {
                rotation = angle > 90 ? angle-90 : 0;

                rotate([0,0,rotation])
                    translate([-dim,0,-dim/2])
                        cube([dim,dim,dim]);
            }
        }
                }
    }
}
module CircularHook(radius=2.5, angle=90, height=5, width=5, arcRadius=0) {

    m = min(height,width,arcRadius);      // Arc should be no greater than the smallest
    arc = m > radius ? m-radius : m;

    arcX = arc * cos(0) - arc * cos(angle);
    arcY = arc * sin(angle) - arc * sin(0);

    ht = height < arcX ? 0 : height-arcX; // Calculate height minus the arc
    w = width < arcY ? 0 : width-arcY;    // Calculate width minus the arc
    h = ht > radius ? ht-radius : 0;      // Compensate for the rounded tip

    translate([radius,width,radius*2])
        union() {

            if(width > 0) {
                translate([0,-w-arcY,-radius])
                    rotate([-90,0,0])
                        union() {
                            cylinder(h=w,r=radius,center=false);

                            if(height <= 0)
                                translate([0,0,w])
                                    sphere(r=radius);
                        }
            }

            if(height > 0) {
                rotate([0,90,0])
                    translate([-arc,-arcY,0])
                        rotateExtrude(angle=angle)
                            // rotate_extrude in v2015 can't handle objects touching
                            // the Y-Axis so we need to bump over the slightest bit
                            // in case arc is zero.
                            translate([radius+arc+.00001,0,0])
                                circle(r = radius);

                translate([0,-arcY,arc])
                    rotate([-90+angle,0,0])
                        translate([0,radius+arc,0])
                            union() {
                                cylinder(h=h,r=radius,center=false);

                                translate([0,0,h])
                                    sphere(r=radius);
                            }
            }
        }
}

module PegBoardAnchor() {
    union() {
        // Upper pegboard anchor
        translate([pbt+hd+hr,pbt+hd,hd])
            rotate([0,90,180])
                CircularHook(hr,90,pbt+hr,pbt);

        // The shank of the hook
        translate([pbt+hr/2,pbt+hd,0])
            cube([hs+hd+hr,hr,hd]);

        // Lower pegboard anchor
        translate([hs+pbt+hr,pbt+hd,0])
            rotate([180,-90,0])
                CircularHook(hr,60,hr,pbt);

    }
}

module PegBoardHook(gape, throat, bendRadius, bendAngle, center=false) {
    pbaX = hs+pbt+hd+hr+hr/2;
    pbaY = pbt+hd+hr;

    partX = pbaX + max(pbaX,throat+hd+hr/2) - pbaX;
    partY = pbaY + gape + hd;

    offsetX = center ? (-partX/2 - (throat > pbaX ? pbaX-throat-hd-hr/2 : 0)) : 0;
    offsetY = center ? (-partY/2) : 0;

    translate([offsetX,offsetY,0])
        union() {
            PegBoardAnchor();

            translate([pbaX-hr/2,pbaY,0])
                rotate([0,-90,0])
                    CircularHook(hr, bendAngle, throat, gape, bendRadius);
        }
}

//render()
    PegBoardHook(Gape, Throat, BendRadius, BendAngle, true);

```


[User]
Okay, I'm looking to create a 3D printable open-cell foam structure, and I'd like to use OpenSCAD to make it parametric. I've seen a basic example that uses a cube and subtracts randomly placed spheres, but I want something more sophisticated.

Here's what I'm envisioning:

1.  **Overall Shape:** I'd like to start with a bounding box that can be a cube, but ideally I'd also be able to make it a rectangular prism, or even a cylinder. I need parameters to control the dimensions of this shape (length, width, height, radius if a cylinder).

2.  **Cell Structure:** Instead of just random spheres, I want to be able to control the cell shape more. I'd prefer to use polyhedra, or maybe even something like a Voronoi pattern for the cell locations. It should be easy to change the cell size, and their distribution within the overall shape. I don't need all of those options at once, but having some different structures would be very helpful, and definitely the ability to use polyhedra with a parameter for the number of faces.

3.  **Parametric Cell Variation:** Within the selected cell structure, I need the ability to control things like the cell diameter (or size if using a cube or polyhedra), the spacing between cells, and the wall thickness of the cells. I would like to be able to adjust the wall thickness independently from the cell size. If using Voronoi cells, I would need to be able to control their overall size as well as the distribution of their center points (including a random distribution). If using random locations, the distribution should not necessarily be fully random, but allow for some clumping.

4.  **Smoothness Control:** The example I saw used a variable called "resolution" to smooth the spheres. I'd need something similar, where I could control the detail of the cells (or the smoothness of the shapes if that's easier to implement).

5.  **Visualization Options:** I would need to be able to visualize the cells on their own before subtraction from the overall shape, similar to the "See_Spheres" variable in the example. I'd also like the ability to color the cells before subtraction or color them after the boolean subtraction.

6.  **Units:** I need to be able to specify units, preferably using the `use <metric.scad>` from MCAD, I guess? I'm using metric measurements.

7.  **Extensibility:** I'd like this to be easily expandable in the future, if I want to add, for example, some porosity grading or changes in cell shape within a single object.

Could you generate an OpenSCAD design, or set of design files, that accomplishes these goals? Please ensure the code is well-commented and uses appropriate variable names.

[Assistant]
Foam.scad:
```
/* [Parameters] */
//The "smoothness" of the pores, higher number means smoother pores
resolution = 10; // [5:25]
//Size of the cube
Cube_Size = 15;
//Number of pores in the cube
Pore_Count = 60; // [10:400]
//Diameter of the spheres
Pore_Size = 2;
//Set to "true" to see just the pores, set to "false" otherwise
See_Spheres = "false"; // [false, true]

/* [Hidden] */
$fn = resolution;

difference(){
    if(See_Spheres == "false")
        cube([Cube_Size,Cube_Size,Cube_Size]);

    for(i = [1:Pore_Count]) {
        xDist = rands(0,Cube_Size,1);
        roundedXDist = round(xDist[0]);

        yDist = rands(0,Cube_Size,1);
        roundedYDist = round(yDist[0]);

        zDist = rands(0,Cube_Size,1);
        roundedZDist = round(zDist[0]);

        translate([roundedXDist, roundedYDist, roundedZDist]){
            sphere(d = Pore_Size);
        }
    }
}
```


[User]
I'd like a parametric OpenSCAD design for a chocolate mold, specifically a heart-shaped one with engraved text. I have a base design, but I need something I can easily adjust.

Here’s what I’m thinking:

1.  **Heart Shape:** The heart should be created from a base that uses a series of points along a half-circle to make one side, mirrored to create the full heart. I want the heart to have a rounded, almost filleted edge. It should also have depth (a non-flat profile). The base design uses a hull and offset layers to create a 3D heart shape, and I'd like to keep that approach or something similar.

2.  **Text Engraving:** I need to be able to engrave text into the top of the heart. The text should be customizable, and I need to control the font size. The engraving depth should be adjustable but 0.7mm is fine as a default.

3.  **Mold Design:** The mold should be composed of two parts: a "shell" and an "inner part." These should be separate, but printable as one object by having a small gap between them. The shell creates the outer shape of the chocolate, and the inner part sits inside to define the cavity. The shell should have a thin wall (like 0.8mm). The gap between the shell and the inner part should also be adjustable. The mold should also have a small block section for separating the shell and the inner part.

4.  **Parameters:**
    *   `engraved_text`:  The text to engrave on the heart (string). Should default to "K+T"
    *   `font_size`: The size of the engraved text. Should default to 13 and have a min/max of [8:1:13].
    *   `heart_size`:  Overall size of the heart.
    *   `shell_wall_thickness`: Thickness of the shell wall. Should default to 0.8.
    *   `engrave_depth`: The depth of the text engraving. Should default to 0.7.
    *   `gap_size`: The distance between the shell and inner part. Should default to 0.5
    *   `heart_depth`:  Overall depth/thickness of the heart mold.

I'd like to be able to adjust the heart's size, text, and some of the mold dimensions. Please provide this as an OpenSCAD file, or if it makes sense a few files. I'm not too concerned about libraries since this should be relatively simple, but if you choose to use a library, just let me know which one.

[Assistant]
valientine.scad:
```
// text to engrave; to fit the frame properly, use capital letters only
engraved_text = "K+T";

// font size
font_size=13; // min/max:[8:1:13]

module half_heart_base(sizefactor=1, offset=0) {
    halfcircle_r = [ for (i = [0 : 1 : 225]) [sin(i)*(sizefactor-offset), cos(i)*(sizefactor-offset)-1*sizefactor+offset]];
    points = concat([[-2.5*sizefactor+2*offset,0]], halfcircle_r);
    polygon(points=points);
}

module half_extruded_filleted_heart() {
    hull() {
        linear_extrude(height=7) half_heart_base(15);
        linear_extrude(height=8) half_heart_base(15, offset=0.3);
        linear_extrude(height=9) half_heart_base(15, offset=1);
        linear_extrude(height=10) half_heart_base(15, offset=3);
    }
}

module extruded_filleted_heart() {
    union() {
        translate([0,0.1,0]) half_extruded_filleted_heart();
        mirror([0,1,0]) half_extruded_filleted_heart();
    }
}

module engraved_heart(text="K+T") {
    difference() {
        extruded_filleted_heart();
        translate([-font_size-(12-font_size)/2+0.25,0,9.4])
        linear_extrude(height=0.7) rotate([0,0,-90])
        text(text, halign="center", size=font_size, font="Liberation Sans:style=Bold");
    }
}

module text_border() {
    difference() {
        translate([-13,-20,-0.1]) cube([14,40,5]);
        translate([-12.5,-19.5,-0.2]) cube([13,39,6]);
    }
}

module heart_shell(text) {
    difference() {
        linear_extrude(height=11.2)
        offset(r=0.8) {
            half_heart_base(sizefactor=15);
            mirror([0,1,0]) half_heart_base(sizefactor=15);
        }
        translate([0,0,11.3]) rotate([180,0,0]) engraved_heart(text);
        text_border();
    }
}

heart_shell(engraved_text);

```


[User]
Hey, I'm looking to design a modular cube system using 3-way joints, and I need some help generating the OpenSCAD files.

The basic idea is that I have a shaft with a 3-way joint mirrored on *both* ends. Each of these shafts can then slide into other shafts to form a cube. I need 12 of these to complete the cube.

Here are the parameters I need to be able to customize:

*   **`width`**: This is the width of the square shaft itself.
*   **`height`**: This is the height of the *solid* part of the shaft, *not* including the joints on either end.
*   **`tolerance`**: This should be a small value, say around 0.01, to create a gap for easier assembly after printing. I need to be able to adjust this.

The joint itself should consist of three interlocking pieces coming off the main shaft (see the description in the included SCAD file for more details). They should have a rectangular prism shape.

I'd like the generated SCAD code to be parametric so I can change the `width`, `height`, and `tolerance` easily. I don’t need any external libraries for this but I do want the code to be as modular and readable as possible. I should be able to render this and produce a printable part easily.

Can you help me with this?

[Assistant]
Mirrored_3-way_joint_-_Cube_Assembly.scad:
```
//this is the user inputed width of the square shaft
width=9;
//this is the user inputed height of the solid shaft (not including the joint)
height=12;
//this is the user inputed tolerance. may be printer specific. incorporating about 0.01" gap works well on my Makerbot Replicator
tolerance=0.01;

module joint(width, height){
    cube([width, width, height]);
    translate([0,0,height]){cube([width/3-tolerance/2,width, width/3]);}
    translate([0,width/3+tolerance/2,height+width/3]){
        cube([width/3-tolerance/2,width/3-tolerance,2*width/3]);}
    translate([2*width/3+tolerance/2,width/3+tolerance/2,height]){
        cube([width/3-tolerance/2,width/3-tolerance,width]);}

}

module piece1(width, height1){
    joint(width,height1);
}

piece1(width,height/2);
rotate(v=[1,0,0],a=180){
    translate([0,-width,0]){
    piece1(width,height/2);
}}
```


[User]
I'm looking to design a new carriage for my Anet A8 3D printer, specifically to mount an E3D v6 hotend and move to a bowden setup. I've seen a design on Thingiverse, "CarriageV3__AnetA8_E3Dv6_Mount_TNS" that has most of what I want, but I'd like to make my own from scratch to better suit my needs and also to make sure I understand the parameters.

Essentially, the core of the design is a backplate with several mounting points for the E3D hotend and the linear rail. This plate should also have optional zip tie holes for cable management. In the Thingiverse design, it seems the backplate has a rounded-rectangle shape, which is great. Additionally, I need an optional fan holder that can attach to this backplate, ideally with some adjustability in the X, Y, and Z directions, along with the possibility to include another zip tie hole on the fan holder.

The design should also have an optional sensor holder, the diameter, height, and wall thickness should be easily adjustable as well as the x, y, and z position, since I will be adding a proximity sensor for auto bed leveling.

For fine-tuning, I'd like parameters for things like the backplate thickness, its edge radius, the hotend mounting point offset in the X direction, and the radius of that mounting point's finish. Also, I need independent offset parameters for the fan holder in the X, Y and Z directions.

Finally, the design should use the same mounting points as the Anet A8 for the linear slide and belt holder, as well as the E3Dv6 mounting points, including the screw holes. I'd like to be able to turn on a render mode that has a low-poly approximation for faster preview generation. Please ensure all necessary parameters for this are exposed within the code.

Could you generate all the necessary OpenSCAD code files for this project, keeping it as parametric as possible? I don't need any specific library to be included, I will handle all dependencies on my end.

[Assistant]
CarriageV3__AnetA8_E3Dv6_Mount_TNS.scad:
```
/* [Basic] */

// Render mode with rougher edges (CAUTION: turn OFF before thing creation! - preview will fail (script timeout) but export will work!)
render_mode = 1; // [0:off, 1:on]

// Total height of hotend (top to nozzle tip) in mm (E3Dv6: ~63mm, Some Clones: ~74mm)
hotend_height = 63; // [60:85]

// Zip tie holes on backplate
zip_tie_holes_backplate = 1; // [0:no, 1:yes]

// Include cooling fan holder
include_fan_holder = 1; // [0:no, 1:yes]

// Zip tie hole on fan holder
zip_tie_hole_fan_holder = 1; // [0:no, 1:yes]

/* [Sensor Holder] */

// Add a sensor holder to the carriage (if activated: print with support advised!) - ATTENTION: Depending on the position of your sensor holder, it may interfere with other components (e.g. cooling fan of hotend, cable chain, ...) -> Based on this fact, the sensor holder on the back of the carriage is still the recommended version (links can be found in the thing-description.)
include_sensor_holder = 0; // [0:no, 1:yes]

// X-Offset of sensor holder mounting point in mm (>0mm recommended)
x_offset_sensor = 0; // [-8:0.1:20]

// Y-Offset of sensor holder mounting point in mm (0mm recommended)
y_offset_sensor = 0; // [-2:0.1:20]

// Z-Offset of sensor holder mounting point in mm
z_offset_sensor = 0; // [-12:0.1:15]

// Select your sensor diameter (Most common: M18, M12, M8)
sensor_diameter = 18; //[6:1:20]

// Height/thickness of the sensor holder (default: 8mm)
sensor_holder_height = 8; //[5:0.1:20]

// Thickness of the wall surrounding the sensor (default: 4mm)
sensor_holder_wall_thickness = 4;  //[2:0.1:10]

/* [Expert Fine Tuning] */

// Thickness of backplate in mm (6mm recommended)
thickness_backplate = 6;   // [5:0.1:10]

// Radius of backplate finish in mm (5mm recommended)
finish_backplate = 5;  // [1:0.1:8]

// X-Offset of hotend mounting point in mm (0mm recommended)
x_offset_hotend = 0;  // [-8:0.1:8]

// Radius of hotend mounting point in mm (5mm recommended)
finish_hotend_mount = 5;  // [0:0.1:8]

// Fan holder offset in z-direction in mm (printer coordinate system - up/down)
z_offset_fan_holder = 0;  // [-3:0.1:10]

// Fan holder offset in x-direction in mm (printer coordinate system - left/right)
x_offset_fan_holder = 0;  // [-10:0.1:3]

// Fan holder offset in y-direction in mm (printer coordinate system - back/forth)
y_offset_fan_holder = 0; // [-10:0.1:6]

/* [Hidden] */

// Circle resolution
$fn= render_mode? 10: 50;

// Get extension of building plate to the left based on fan holder position
bp_left_extension = (!include_fan_holder) ? 0 : max(0,3.2+(-x_offset_fan_holder));

// Merge z offset fan and hotend length
z_offset_fan_holder_merge = (74-hotend_height) + z_offset_fan_holder;

// Get extension of building plate to the bottom based on fan holder position
bp_bottom_extension = (!include_fan_holder) ? 0 : max(0,0-z_offset_fan_holder_merge);

if(render_mode){

translate([0,100,30])
rotate([90,0,45])
text("Render Mode");

translate([0,100,10])
rotate([90,0,45])
text("Text will dissapear", size = 7);

translate([0,100,0])
rotate([90,0,45])
text("with render mode 'off'!", size = 7);
}

Backplate();

// Backplate
module Backplate(){

    difference(){
        union(){
            translate([-bp_left_extension,-bp_bottom_extension,0])      roundedRect([62+bp_left_extension,84+bp_bottom_extension,thickness_backplate], finish_backplate);

            MountingpointE3D(16+x_offset_hotend,37.24,13.75);

            if(include_fan_holder)
            {
                FanHolder2(x_offset_fan_holder-3,z_offset_fan_holder_merge, -y_offset_fan_holder);
            }

            if(include_sensor_holder)
            {
                sensorHolder(65+x_offset_sensor,25+z_offset_sensor,20+y_offset_sensor,sensor_diameter,sensor_holder_height,sensor_holder_wall_thickness);
            }
        }

    ScrewHolesBackplate();
        ScrewHolesBelt();

        if(zip_tie_holes_backplate)
            {
            ZiptieHoles();
            }
    }

}

module FanHolder2(offset_x, offset_y, offset_z){
thickness = 6;
y_lower_screw = 9.5;
z_lower_screw = 62.5;

difference(){

translate([offset_x-0.1, offset_y, offset_z])
difference(){

    union(){
    difference(){
    union(){
        hull(){
        FanHolder_Shape([0,0,0],thickness,1,7.5,7.5,offset_y>=9.5? offset_y-9.5 : 0);
        }

        // Support
        FanHolder_Support();
    }

    hull(){
    FanHolder_Shape([0-0.1,6,-15],thickness+0.2,0.1,2,10,30);
    }
    }

    // Rounded inner edge
    inner_radius = 1;

    FanHolder_Shape([0,6,-15],thickness,inner_radius,3,10,30);

   // infill between rounded edges
    translate([inner_radius,0,0]) rotate([0,90,0]) linear_extrude(height = thickness-inner_radius*2) projection() rotate([0,-90,0]) FanHolder_Shape([0,6,-15],thickness,inner_radius,3,10,30);

    }

    // Add screw holes
    translate([-0.1,y_lower_screw,z_lower_screw])
    rotate([0,90,0])
    cylinder(h=thickness+0.2, r=1.25);

    translate([-0.1,y_lower_screw+41,z_lower_screw-41])
    rotate([0,90,0])
    cylinder(h=thickness+0.2, r=1.25);

    // Zip tie hole fan holder
    if(zip_tie_hole_fan_holder){
        hull(){
        translate([-0.1,65,13])
        rotate([0,90,0])
        cylinder(h=thickness+0.2, r=0.75);

        translate([-0.1,65-2.7,13+2.7])
        rotate([0,90,0])
        cylinder(h=thickness+0.2, r=0.75);
        }
    }

}

    // Cut too long bottom elements
    translate([-500,-500,-500]) cube([1000,1000,500]);
}
}

module FanHolder_Support(){
    thickness = 3;
    width = 10;

    translate([0,0.3,0])
    difference(){
    union(){
    difference(){

        union(){
            hull(){
            translate([28,5,-33])
            rotate([0,-14,0])
            cylinder(h=100, r=thickness/2);

            translate([28,5+width-thickness,-33])
            rotate([0,-14,0])
            cylinder(h=100, r=thickness/2);
            }

            translate([4.6,5-thickness/2,40])
            rotate([0,-14,0])
            cube([5,width,15], centering=false);
        }

        difference(){
        translate([7,1,40])
        rotate([-90,0,0])
        cylinder(h=width+5, r=2.9);

        translate([7,1,30])
        rotate([0,-14,0])
        cube([10,width+5,10], centering=false);
        }
    }

    angle2 = 180;
    angle1 = 14;

    start = 5;
    end = 5+width-thickness;

    for(y_stop = [start , end])
    {
        // bend
        translate([7,y_stop,40])
        rotate([90,0,0])
        difference()
        {
        // torus
        rotate_extrude()
        translate([1.2 + thickness/2, 0, 0])
        circle(r=thickness/2);
        // lower cutout
        rotate([0, 0, angle1])
        translate([-50 * (((angle2 - angle1) <= 180)?1:0), -100, -50])
        cube([100, 100, 100]);
        // upper cutout
        rotate([0, 0, angle2])
        translate([-50 * (((angle2 - angle1) <= 180)?1:0), 0, -50])
        cube([100, 100, 100]);
        }
    }

    // infill between rounded edges
    translate([0,5,0]) rotate([-90,0,0]) linear_extrude(height = width-thickness/2*2) projection() rotate([90,0,0])
    {
        // bend
        translate([7,start,40])
        rotate([90,0,0])
        difference()
        {
        // torus
        rotate_extrude()
        translate([1.2 + thickness/2, 0, 0])
        circle(r=thickness/2);
        // lower cutout
        rotate([0, 0, angle1])
        translate([-50 * (((angle2 - angle1) <= 180)?1:0), -100, -50])
        cube([100, 100, 100]);
        // upper cutout
        rotate([0, 0, angle2])
        translate([-50 * (((angle2 - angle1) <= 180)?1:0), 0, -50])
        cube([100, 100, 100]);
        }
    };

}
translate([-4.2,0,0])
cube([10,20,100]);
}
}

module FanHolder_Shape(offset,thickness,radius,bend1,bend2,reduceHeight = 0){

bend_radius = bend1 - radius*2;
bend_radius2 = bend2 - radius*2;

// Leave like this
angle_1 = 0;
angle_2 = 135;
angle_3 = 180;
length_1 =75;
length_2 =80-(reduceHeight/cos(angle_2-90));
length_3 =20+reduceHeight;

start = (0+radius);
end  = (thickness-radius);

union(){
for(x_stop = [start , end])
{
translate([offset[0]+x_stop,10+offset[1],60+offset[2]])
rotate([90,0,-90])
union() {
// lower arm
rotate([0, 0, angle_1])
translate([bend_radius + radius, 0.02, 0])
rotate([90, 0, 0])
cylinder(r=radius, h=length_1+0.04);

// middle arm
rotate([0, 0, angle_2])
translate([bend_radius + radius, -0.02, 0])
rotate([-90, 0, 0])
cylinder(r=radius, h=length_2+0.04);

// upper arm
translate([-sin(angle_2)*length_2+ cos(angle_2)*(bend_radius - bend_radius2),cos(angle_2)*length_2+ sin(angle_2)*(bend_radius - bend_radius2),0])
rotate([0, 0, angle_3])
translate([bend_radius2 + radius, -0.02, 0])
rotate([-90, 0, 0])
cylinder(r=radius, h=length_3+0.04);
// bend
difference()
{
// torus
rotate_extrude()
translate([bend_radius + radius, 0, 0])
circle(r=radius);
// lower cutout
rotate([0, 0, angle_1])
translate([-50 * (((angle_2 - angle_1) <= 180)?1:0), -100, -50])
cube([100, 100, 100]);
// upper cutout
rotate([0, 0, angle_2])
translate([-50 * (((angle_2 - angle_1) <= 180)?1:0), 0, -50])
cube([100, 100, 100]);
}

// bend2
translate([-sin(angle_2)*length_2 + cos(angle_2)*(bend_radius - bend_radius2),cos(angle_2)*length_2 + sin(angle_2)*(bend_radius - bend_radius2),0])
difference()
{
// torus
rotate_extrude()
translate([bend_radius2 + radius, 0, 0])
circle(r=radius);
// lower cutout
rotate([0, 0, angle_2])
translate([-50 * (((angle_3 - angle_2) <= 180)?1:0), -100, -50])
cube([100, 100, 100]);
// upper cutout
rotate([0, 0, angle_3])
translate([-50 * (((angle_3 - angle_2) <= 180)?1:0), 0, -50])
cube([100, 100, 100]);

}
}
}
}
}

module ZiptieHoles(){
   translate([62-6.5,63,thickness_backplate-5+0.1]) ZiptieHole();

   translate([17.5,84-6.5,thickness_backplate-5+0.1]) rotate([0,0,90]) ZiptieHole();

   translate([49,84-6.5,thickness_backplate-5+0.1]) rotate([0,0,90]) ZiptieHole();

}

module ZiptieHole(){
    ZiptieWidth = 5;
    ZiptieHeight = 1.5;
    ZiptieBendRadius = 2.5;

    union(){

    difference(){
        translate([ZiptieBendRadius,0,ZiptieBendRadius])
            rotate([-90,0,0])
       cylinder(h=ZiptieWidth, r=ZiptieBendRadius, center=false);

        translate([ZiptieBendRadius,-1,0]) cube([ZiptieBendRadius+1,ZiptieWidth+2,ZiptieBendRadius*2.1], center=false);

        translate([0,-1,ZiptieBendRadius]) cube([ZiptieBendRadius*2.1,ZiptieWidth+2,ZiptieBendRadius+1], center=false);

        translate([ZiptieBendRadius,-1,ZiptieBendRadius])
            rotate([-90,0,0])
       cylinder(h=ZiptieWidth+2, r=ZiptieBendRadius-ZiptieHeight, center=false);
    }

    translate([ZiptieBendRadius-0.01,0,0]) cube([6.5-ZiptieBendRadius+1,ZiptieWidth,ZiptieHeight], center=false);

    translate([0,0,ZiptieBendRadius-0.01]) cube([ZiptieHeight,ZiptieWidth,5-ZiptieBendRadius+1], center=false);

    }
}

module MountingpointE3D(x_pos,y_pos,dh){
    width = 30;
    height = 12.68;
    height_upper_ring_hotend = 3.8;
    height_ring_rinse = 5.88;

    translate([x_pos,y_pos,thickness_backplate-0.01])
    difference(){
        union()
        {
            roundedPlateau(width,height,finish_hotend_mount);

            cube([width,height,dh], center=false);
        }

        // Screw holes
        translate([4,height/2,0.1])
   cylinder(h=dh, r=2.83/2, center=false);

        translate([width-4,height/2,0.1])
   cylinder(h=dh, r=2.83/2, center=false);

        // Mounting clip
        translate([width/2,-1,dh])
        rotate([-90,0,0])
   cylinder(h=height-height_ring_rinse-height_upper_ring_hotend+1, r=8.17, center=false);

        translate([width/2,height-height_upper_ring_hotend,dh])
        rotate([-90,0,0])
   cylinder(h=height_upper_ring_hotend+1, r=8.17, center=false);

        translate([width/2,-1,dh])
        rotate([-90,0,0])
   cylinder(h=height+2, r=6, center=false);
    }
}

module ScrewHolesBelt(){
    // Generate screw holes for belt attachment
  color("LightSeaGreen"){
  translate([5.437,43.51,-1])
  cylinder(h=thickness_backplate,   r=2.7/2, center=false);

    translate([11.94,43.51,-1])
  cylinder(h=thickness_backplate,   r=2.7/2, center=false);

    translate([11.94,32.535,-1])
  cylinder(h=thickness_backplate,   r=2.7/2, center=false);

    translate([50.014,43.51,-1])
  cylinder(h=thickness_backplate,   r=2.7/2, center=false);

    translate([50.014,32.535,-1])
  cylinder(h=thickness_backplate,   r=2.7/2, center=false);

    translate([56.517,43.51,-1])
  cylinder(h=thickness_backplate,   r=2.7/2, center=false);
  }
}

module ScrewHolesBackplate(){
    // Generates holes for mountingplate

    // top left mounting point
    ScrewHolesLinearSlide(6.28,53.66);

    // top right mounting point
    ScrewHolesLinearSlide(37.68,53.66);

    // bottom mounting point
    ScrewHolesLinearSlide(21.96,7.7);

}

module ScrewHolesLinearSlide(x, y){
// define position of bottom right screwhole and the other ones are adapted correspondingly

  ScrewHole(x, y);

  ScrewHole(x, y+24.19);

  ScrewHole(x+18.04, y+24.19);

  ScrewHole(x+18.04, y);
}

module ScrewHole(x, y){
   translate([x,y,-1])
   color("LightSteelBlue")
   union()
    {
   cylinder(h=thickness_backplate+2,   r=4.3/2, center=false);
   translate([0,0,4])
   cylinder(h=8, r=6.7/2, center=false);
   translate([0,0,11.9])
   cylinder(h=15, r1=6.7/2, r2=0, center=false);
   }
}

module roundedPlateau(dx,dy,h){
    // Generates plateau of height h with rounded edges reaching tangential to the ground
    translate([-h,-h,0])
    difference(){
    cube([dx+2*h, dy+2*h,h], center=false);

    translate([0,-1,h])
    rotate([-90,0,0])
    cylinder(h=dy+2*h+2, r=h, center=false);

    translate([dx+2*h,-1,h])
    rotate([-90,0,0])
    cylinder(h=dy+2*h+2, r=h, center=false);

    translate([-1,0,h])
    rotate([0,90,0])
    cylinder(h=dx+2*h+2, r=h, center=false);

    translate([-1,dy+2*h,h])
    rotate([0,90,0])
    cylinder(h=dx+2*h+2, r=h, center=false);
    }
}

module roundedRect(size, radius){
    x = size[0];
    y = size[1];
    z = size[2];

    // Difference is used for cutting of part generated by spheres
    difference(){
        hull()
        {
            // place 4 cylinders and spheres in  the corners, with the given radius
            translate([(radius), (radius), 0])
            cylinder(h=z-radius, r=radius);

            translate([(radius), (radius), z-radius])
            sphere(r=radius);

            translate([(x)-(radius), (radius), 0])
            cylinder(h=z-radius, r=radius);

            translate([(x)-(radius), (radius), z-radius])
            sphere(r=radius);

            translate([(radius), (y)-(radius), 0])
            cylinder(h=z-radius, r=radius);

            translate([(radius), (y)-(radius), z-radius])
            sphere(r=radius);

            translate([(x)-(radius), (y)-(radius), 0])
            cylinder(h=z-radius, r=radius);

            translate([(x)-(radius), (y)-(radius), z-radius])
            sphere(r=radius);
        }
        translate([0,0,-(z+radius)*2]) cube([x,y,(z+radius)*2], center=false);
    }
}

module sensorHolder(x,y,z,dia,thickness,wall){

    difference(){
        union(){
            hull(){
                translate([x,y,z])
                    rotate([90,0,0])
                        cylinder(r=dia/2+wall, h=thickness);

                // Position on left in carriage
                translate([50,y,wall/2+0.1])
                    rotate([90,0,0])
                        cylinder(r=wall/2, h=thickness);

                // Position on right in carriage
                translate([60,y,wall/2+0.1])
                    rotate([90,0,0])
                        cylinder(r=wall/2, h=thickness);

            }
        }

        translate([x,y+1,z])
                rotate([90,0,0])
                    cylinder(r=dia/2, h=thickness+2);

    }

}

```


[User]
I'd like to create a customizable fidget spinner that uses a yin-yang design with weights on the outer edges. It should have a central bearing and several (between 2 and 4) peripheral "yin-yang" shapes that hold the weights. I'd like to be able to customize the type of weight used, the edge roundness, and the rotation of the peripheral yin-yang pieces.

Specifically, I'd like to be able to choose from the following types of weights: 608 bearing, 5/16 hex nut, 3/8 hex nut, 1/2 hex nut, M8 hex nut, M10 16 hex nut, M10 17 hex nut, M12 18 hex nut, M12 19 hex nut, M4 square nut, penny, nickel, dime, quarter, 5/16 ball bearing, 3/8 ball bearing, 1/2 ball bearing, and 5/8 ball bearing.

The center bearing should be customizable by diameter and I'd like to be able to set the number of peripheral objects (2, 3 or 4), the edge roundness (radius), the angle of the peripheral objects, and how much the bearing frame overlaps the weight frames. I'd also like to reduce the "tail" portion of the yin-yang shapes.

I think the design can be accomplished using the standard OpenSCAD libraries. No need for anything fancy like BOSL or MCAD. Could you help generate the OpenSCAD code for me?

[Assistant]
spin-yin-yang-2019-08-27.scad:
```
// lucina
// 2019-08-27  added center bearing diameter setting
// 2017-09-29
// preview[view:south, tilt:top]

/* [settings] */
// the number of peripheral objects
objects = 3; //[2,3,4]
// the type of weight
whichWeight = "5/16 hex nut";   //[608 bearing, 5/16 hex nut, 3/8 hex nut, 1/2 hex nut, M8 hex nut, M10 16 hex nut, M10 17 hex nut, M12 18 hex nut, M12 19 hex nut, M4 square nut, penny, nickel, dime, quarter, 5/16 ball bearing, 3/8 ball bearing, 1/2 ball bearing, 5/8 ball bearing]
// edge roundness in mm; > 0 causes timeout but Create Thing still works
radius = 0; //[0:.5:3]
// angle of the peripheral objects: 2 objects: use ~120, 4 objects: use ~170
rotation = 140;  //[115:5:170]
// the overlap in mm between the bearing frame and the weight frames
overlap = 1;  //[1.0, 1.5, 2.0, 2.5]
// reduce "tail"
reduce = 0; //[0:.1:2]

/* [center bearing] */
// outside diameter in mm of the center bearing
centerBearingDiameter = 22;   //[10:.5:30]

/* [Hidden] */
$fn = 60;
x = 0; y = 1; z = 2;
thick = 3;
space = 2;
inch = 25.4;

bearing = [centerBearingDiameter, centerBearingDiameter, 7]; //center bearing

bearing608 = [22, 22, 7];  // 608 bearing
sae = [.577*inch, .5 * inch, 7]; // 5/16 hex nut
sae38 = [.650*inch,.562*inch, 7];	// 3/8
sae12 = [.866*inch, .75*inch, 7];	// 1/2
metric8 = [15, 13, 7];   // M8 hex nut
metric10_16 = [17.77, 16, 7];   // M10 16 hex nut
metric10_17 = [19.6, 17, 7];   // M10 17 hex nut
metric12_18 = [20.03, 18, 7];   // M12 18 hex nut
metric12_19 = [21.9, 19, 7];   // M12 19 hex nut
metric4sq = [7, 7, 3.2];
penny = [19.05, 19.05,1.55];  //x4
nickel = [21.21, 21.21, 1.95]; //x3
dime = [17.91, 17.91, 1.35]; //x5
quarter = [24.26, 24.26, 1.75];  // x4
ball516 = [5/16*inch, 5/16*inch, 5/16*inch];
ball38 = [3/8*inch, 3/8*inch, 3/8*inch];
ball12 = [1/2*inch, 1/2*inch, 1/2*inch];
ball58 = [5/8*inch, 5/8*inch, 5/8*inch];

step = 360 / rays;
stop = (rays-1) * step;
weight = (whichWeight == "608 bearing") ? bearing608:
   (whichWeight == "5/16 hex nut") ? sae :
   (whichWeight == "3/8 hex nut") ? sae38 :
   (whichWeight == "1/2 hex nut") ? sae12 :
   (whichWeight == "M8 hex nut") ? metric8 :
   (whichWeight == "M10 16 hex nut") ? metric10_16 :
   (whichWeight == "M10 17 hex nut") ? metric10_17 :
   (whichWeight == "M12 18 hex nut") ? metric12_18 :
   (whichWeight == "M12 19 hex nut") ? metric12_19 :
   (whichWeight == "M4 square nut") ? metric4sq :
   (whichWeight == "penny") ? penny :
   (whichWeight == "nickel") ? nickel :
   (whichWeight == "dime") ? dime :
   (whichWeight == "quarter") ? quarter :
   (whichWeight == "5/16 ball bearing") ? ball516 :
   (whichWeight == "3/8 ball bearing") ? ball38 :
   (whichWeight == "1/2 ball bearing") ? ball12 : ball58;
echo(whichWeight, weight[x], weight[y], weight[z]);
resolution = (whichWeight == "5/16 hex nut") ? 6 :
(whichWeight == "3/8 hex nut") ? 6 :
(whichWeight == "1/2 hex nut") ? 6 :
(whichWeight == "M8 hex nut") ? 6 :
(whichWeight == "M10 16 hex nut") ? 6 :
(whichWeight == "M10 17 hex nut") ? 6 :
(whichWeight == "M12 18 hex nut") ? 6 :
(whichWeight == "M12 19 hex nut") ? 6 :
(whichWeight == "M4 square nut") ? 4 : 60;

step = 360 / objects;
stop = (objects-1) * step;
outerR = weight[x]+2*space-radius;

module yin(rad) {
   translate([0, -outerR/2, 0])
         minkowski() {
            union() {
               difference() {
                  cylinder(h = bearing[z]-2*rad, r = outerR, center = true);
                  union() {
                     translate([0, -(outerR/2), 0])
                        scale([1+reduce, 1, 1])
                           cylinder(h = bearing[z]*2, r = outerR/2, center=true);
                     translate([outerR/2, 0, 0])
                        cube([outerR, 2*outerR, 2*bearing[z]], center=true);
                  }
               }
               translate([0, outerR/2, 0])
                  cylinder(h = bearing[z]-2*rad, r = outerR/2, center=true);
            }
         sphere(rad);
   }
}

module fcylinder(z, x, rad) {
   translate([0, 0, rad-z/2])
      minkowski() {
         cylinder(h=z-2*rad, d=x-2*rad);
         sphere(rad);
      }
}
difference() {
   union() {
      fcylinder(bearing[z], bearing[x]+2*thick, radius);
      for ( angle = [0 : step : stop] ) {
         rotate([0, 0, angle])
            translate([(bearing[x])/2 + thick + outerR/2-overlap, 0, 0])
               rotate([0, 0, -rotation])
                  yin(radius);
      }
   }
   // holes
   union() {
      cylinder(h=2*bearing[z], d=bearing[x], center=true);
      for ( angle = [0 : step : stop] ) {
         rotate([0, 0, angle])
            translate([(bearing[x])/2 + thick + outerR/2-overlap, 0, 0])
               rotate([0, 0, 30])
                  cylinder(h=2*bearing[z], d=weight[x], center=true, $fn=resolution);
      }
   }
}

```


[User]
Hey, I'm looking for help creating a parametric cactus generator in OpenSCAD. I've got a basic idea of what I want, kind of like the code I attached, but I'd like to make it more flexible and tweakable.

Basically, I want to generate a group of cacti, each with a randomized shape, size, and position. Here are the core features I'm thinking about:

*   **Number of Cacti:** I'd like to be able to control the number of cacti generated. So, there should be a variable for this, something like `num_of_cacti`.
*   **Cactus Shape:** I'd like the cacti to be based on spheres that have been stretched and squashed in random ways. Each cactus should have a random width, length and height. Also, they should be 'faceted' like they have flat sides instead of being a smooth sphere. There should be a variable controlling how many facets to use, like `cacti_side_facets`. All the cacti should have the same number of sides.
*   **Randomization:** Each cactus should have a random position (x, y, and z) and random rotation (around x, y, and z axis), within certain ranges. Also the height of the initial sphere for each should be randomized.
*   **Base:** I'd like a base for the cacti to sit on. This should be a flat disk, and I would like to be able to set the disk's diameter and height.
*   **Color:** I'd like each of the cacti to be a shade of green, and for the base to be brown.
*   **No Libraries:** I'm not using any libraries.

The code I attached gets the basic functionality, but I'm hoping to make this more robust and have better defined parameters for each cactus. Also, the way the code does the random numbers isn't great. Can you generate a version of this from scratch?

[Assistant]
cactusgen.scad:
```
/* [Global] */
/* [Cacti settings] */
// The amount of cacti still randomizes, this just ups the highest limit. ALSO WHAT YOU SEE IS NOT WHAT GETS GENERATED! Just click the button and see what it churns out.
num_of_cacti = 5; // [1:50]
// This is a static number, all cacti will have the same number of side facets.
cacti_side_facets = 10; // [5:50]

/* [Hidden] */
listcactip = rands(0,num_of_cacti,1);

module cactusPart(height){
    listcw = rands(.55,.85,1);
    cactusw=listcw[0];
    listcl = rands(.35,.45,1);
    cactusl=listcl[0];
    listch = rands(1.75,3,1);
    cactush=listch[0];
    difference(){
        scale([cactusw,cactusl,cactush]) sphere(d=height, $fn = cacti_side_facets);
        translate([-10,-10,-90])cube([1000,1000,80]);
    }
}

module cactusMake(){
    cactip=listcactip[0];
    for (i = [0 : cactip]){
        //i in the list lets us pull 1 of the num_of_cacti values generated depending on what i is as it cycles the for loop.
        //angles start here.
        listcxa = rands(-20,20,num_of_cacti);
        cactusxa=listcxa[i];
        listcya = rands(-20,20,num_of_cacti);
        cactusya=listcya[i];
        listcza = rands(-40,40,num_of_cacti);
        cactusza=listcza[i];

        //axises start here.
        listcx = rands(-25,25,num_of_cacti);
        cactusx=listcx[i];
        listcy = rands(-25,25,num_of_cacti);
        cactusy=listcy[i];
        listcz = rands(-5,0,num_of_cacti);
        cactusz = listcz[i];

        //Height value for the generator.
        listcsh = rands(10,30,num_of_cacti);
        cactussh = listcsh[i];
        //Combining the code.
        color([.3, .5, .3])translate([cactusx,cactusy,cactusz])rotate([cactusxa,cactusya,cactusza])cactusPart(cactussh);
        i=i+1;
    }
}

difference(){
    cactusMake();
     translate([0,0,-15])cube([100,100,30],true);
}
color([.9, .7, .3])translate([0,0,0])scale([1,1,4])circle(50,h=10);
```


[User]
I'd like to design some clock hands for a clock I'm making. I need two different hand types: one for minutes and one for hours, and I need them to be parametric. I'd like to be able to specify the length of the hands, and they should have a circular tip with a diameter of 8mm.

Here are the specifics:

*   **Hand Types:** I need two distinct hand types: "minutes" and "hours".
*   **Length:** The length of both hands should be customizable via a parameter.
*   **Tip:** Both hand types should have a circular tip of 8mm diameter.
*   **Thickness:** The hour hand should be slightly thicker than the minute hand.
*   **Hole Shape:** The hole for attaching the hands to the clock mechanism should be different for the hours and minutes hand. The minute hand hole should have a "stretched circle" shape, sort of like a flattened oval with two half circles on the ends, and it should have two such holes, one inside the other. The hour hand hole should be a circle with a smaller circle cut out of the middle, sort of like a donut.
*   **Units:**  I'm working in millimeters (mm).
*   **Libraries:** I'm not using any external libraries, so we can keep it to just standard OpenSCAD functions.

Could you generate an OpenSCAD file or files for this?

[Assistant]
clock_hands.scad:
```

$fn= 128*1;

// Length of clock hand in mm
length = 120; // [10:200]
// Minutes or hours clock hand
clockhandType = "minutes"; // ["minutes", "hours"]

module streched_circle(d, s) {
    //d is diameter of circle, s is length of the part in the middle
    hull() {
        translate([0, -s/2, 0]) half_circle(d);
        rotate([0,0,180]) translate([0,-s/2,0]) half_circle(d);
    }
}

module half_circle(d) {
        difference() {
        scale([1,0.9, 1]) circle(d=d);
        translate([0,d/2,0]) square(size=d, center=true);
    }
}

module hole_shape_hours() {
    //shape of the hole of the clock hand for hours
    difference() {
        circle(d=10);
        circle(d=5.2);
    }
}

module hole_shape_minutes() {
    //minutes clock hand
    difference() {
        streched_circle(6, 4);
        streched_circle(3, 1.8);
    }
}

module pointer(h, length) {
    d=8;
    yf = length/(1.5*d);

    difference() {
        linear_extrude(h) {
            hull() {
                translate([0,d*yf,0]) scale([1, yf, 5]) circle(d=d);
                    scale([1, 1, 5]) circle(d=d+2);
                }
        }

    difference() {
        hull() {
            linear_extrude(h) children();
            }
        linear_extrude(h) children();
    }

    }

}

if (clockhandType == "minutes") {
    pointer(h=1, length=length) {hole_shape_minutes();}
}

if (clockhandType == "hours") {
    pointer(h=2, length=length) {hole_shape_hours();}
 }

```