[User]
I'd like to create a parametric OpenSCAD model of a Helicone sculpture, similar to the one described in the provided text and links. It's a fascinating kinetic sculpture where rotating a central shaft causes a series of layered discs with petal-like arms to either form a helix or a cone shape.

The key is that the discs have offset pins that interact with angled slots cut into each disc. The offset and angling of these slots are what determines the overall helix or cone shape. I want the model to be fully parametric, so I can experiment with different dimensions, shapes, and even the function that controls the offset of the arms.

Here are the specific parameters I think I need:

*   **Shaft Diameter (`shaft_d`)**: The diameter of the central shaft. Should probably include a small clearance.
*   **Pin Diameter (`pin_d`)**: The diameter of the pins that engage with the slots.
*   **Slot Diameter (`slot_d`)**: The diameter of the slot that the pins sit in, again with a small clearance.
*   **Disc Diameter (`disc_d`)**: The overall diameter of each disc.
*   **Slot Inset (`slot_inset`)**: How far the pin slot is inset from the edge of the disc.
*   **Disc Height (`height`)**: The height of each disc.
*   **Pin Height (`pin_height`)**: How far each pin should extend above the disc.
*   **Slot Height (`slot_height`)**: The height of the slot, should be a little taller than the pin.
*  **Arm Width (`arm_width`)**: The width of the "arms" connecting the petals.
*   **Petal Width (`petal_width`)**: The minor axis of the oval shape that defines the petals.
*   **Petal Length (`petal_length`)**: The major axis of the oval shape that defines the petals.
*   **Number of Slices (`slices`)**:  The total number of discs in the structure.
*   **Helix Angle A (`angle_a`)**: The primary angle of the helix, used in one of the examples.
*   **Increment Angle B (`angle_b`)**: The incremental angle added to the slots between discs.
*   **`$fa` and `$fs`**:  Standard OpenSCAD variables for circle fragment angle and fragment size, I guess.
*   **`slop`**: A small tolerance value.
*  **Markings (`markings`)**: A boolean to add or hide text markings on the underside of the petals.
*  **Part (`part`)**: To select which part is rendered (the whole assembly or individual slice).

I would also like to be able to experiment with different functions for `slice_r` (how far the petal is offset from center on each slice), so the function that generates this value should be easily modifiable. The given function uses an ellipse, but I may want to try others.

The model should create the following:

1.  **`slice(p)` module**: This generates one single slice or the top/bottom caps. This module will need to handle the disc, pin, petal arms, slot, and optional text markings.  It should render a different design depending on the integer passed to it.
    * if `p == -2`, the top cap. It has a full, un-offset slot.
    * if `p == -1`, the bottom cap. It has no slot.
    * if `p >= 0`, it represents a slice. It has a slot that is offset by the `angle_a` and `angle_b` parameters.
2. **`petal()` module**: This defines the shape of the petal itself as a scaled circle.
3.  **`slice_r(y)` function**: This determines the radius of the petal based on the slice number, should use the ellipse formula provided but be easy to change.
4.  **`helicone(i, theta)` module**: This builds the overall structure by placing individual slices, rotating each slice by a given amount.

I'd also like to have an easy way to render either the entire helicone using parameter `i` to specify the number of slices to build, or just a single slice by specifying an integer value.

I think I'll need a few conditional statements to generate the various parts correctly based on the value of `p` in the `slice()` module. I also need to calculate some angles and offsets and use them to create the correct slot shapes.

I don't need any external libraries for this.

Can you generate the necessary OpenSCAD files?

[Assistant]
helicone.scad:
```
// Shaft diameter. Measure diameter and allow an extra .3mm or so.
shaft_d = 5.2;

// Diameter of driving pins.
pin_d = 3;

// Slot in which pins sit. Allow a little extra to prevent binding.
slot_d = 3.2;

// Central disc diameter.
disc_d = 20;

// How far from the edge to inset the slot.
slot_inset = 1.2;

// Height of each disc.
height = 2;

// How far each pin should extend above the disc.
pin_height = 1;

// Allow a little extra to prevent binding.
slot_height = 1.2;

// Width of the arms.
arm_width = 3;

// Minor axis of ovals which define the petals.
petal_width = 10;

// Major axis of petals.
petal_length = 15;

// Label slices on the underside of one petal with the slice number.
markings = true; // [true, false]

part = "helicone_a"; // [helicone_a, -2, -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18]

/* [Hidden] */
slices = 36;
angle_a = 68.75;
angle_b = 90 / slices;
$fa = 5;
$fs = 0.5;
slop = 0.1;

// p == -2: top cap
// p == -1: bottom cap
// p >= 0: slice
module slice(p) {
     r = disc_d/2 - slot_inset - pin_d/2; // radius of center of pin
     x = slice_r(p);
     difference() {
	  union() {
	       cylinder(h=height, d=disc_d); // main disc
	       if (p >= -1) { // no pin for top cap
		    translate([-r, 0]) cylinder(h=height + pin_height, d=pin_d); // pin
	       }

	       if (p >= 0) {
		    difference() {
			 linear_extrude(height - .2) {
			      // petals
			      translate([x, 0]) petal();
			      translate([-x, 0]) petal();

			      // arms
			      square([x*2, arm_width], center=true);
			 }
			 // markings
			 if (markings) {
			      translate([x, 0]) rotate([180, 0, 90]) translate([0, 0, -.2])
				   linear_extrude(.2 + slop) text(str(p), halign="center", valign="center", size=5);
			 }
		    }
	       }
	  }
	  translate([0, 0, -slop]) cylinder(h=2*slop + height, d=shaft_d); // shaft hole
	  // additional angle to add to slot due to pin radius
	  additional_angle = asin(pin_d/2 / r);

	  // pin slot
	  if (p == -2) {
	       // top cap has full slot, bottom cap has no slot.
	       rotate_extrude()
		    translate([r - slot_d/2, -slop])
		    square([slot_d, slot_height + slop]);
	  } else if (p >= 0) {
	       rotate([0, 0, -angle_b - additional_angle])
		    rotate_extrude(angle=angle_a + angle_b + 2*additional_angle)
		    translate([r - slot_d/2, -slop])
		    square([slot_d, slot_height + slop]);
	  }
     }
}

module petal() {
     scale([1, petal_length/petal_width]) circle(d=petal_width);
}

// Complete ellipse with offset
// function slice_r(y) = (disc_d + petal_width)/2 + sqrt((1 - pow(y - slices/2, 2)/pow(slices/2 - 1, 2)) * pow(slices * .5, 2)) + 2;
// Truncated ellipse
function slice_r(y) = (disc_d + petal_width)/2 + sqrt((1 - pow(y - (slices - 1)/2, 2) / pow((slices + 1)/2, 2)) * pow(slices * .6, 2));

module helicone(i, theta=68.75) {
     for (j = [0:i]) {
	  translate([0, 0, j*height]) rotate([0, 0, j*theta]) slice(j);
     }
}

if (part == "helicone_a") {
     helicone(slices - 1, angle_a);
} else if (part == "helicone_b") {
     helicone(slices - 1, angle_b);
} else {
     slice(part);
}

```


[User]
Hey, I'm looking to generate a part that's basically a combination of a bearing mount and a flange, with some mounting holes. I've got a file already ([comboblock.scad](comboblock.scad)) which sort of does it, but it's pretty messy and hard to modify, and I'd like something cleaner and more parametric.

Specifically, I need to be able to control:

*   **Bearing Dimensions:** Both the radius and the width of the bearing.
*   **Bolt Hole Dimensions:** The radius of the bolt holes, the radius of the bolt heads, and the center-to-center distance between the bolt holes.
*   **Foot Dimensions:** The height and width of the "feet" or mounting flanges.
*   **Material Thickness:**  The thickness of the material around the bearing and the flange portions.
*   **Chamfer:**  A chamfer value that affects both the cylindrical features and the feet edges.
*   **Orientation:** The design should be able to be rendered in either a horizontal, vertical, or combined (both) orientations.
*   **Detail:**  A variable to control the level of detail of the part (specifically impacting `$fn`).

I'd like the part to have a central cylindrical section to hold the bearing, with "feet" or flanges extending out that can be bolted down. The bolt holes should be countersunk to accept standard bolts.  I'd like the feet to be reinforced in some way and to have variable width, ideally using a hull function to blend the foot and cylindrical section.

Could you create a parametric OpenSCAD file (or files) that does this? I'm not sure how best to structure the code, but I'd like it to be reasonably clear and maintainable. I'm not using any custom libraries currently, so please don't assume the existence of any.

[Assistant]
comboblock.scad:
```
detail=25;//[12:100]
$fn=detail;
Orientation =2;//[1:Horizontal,0: Vertical,2: Both]
Bearing_Radius=21;
Bearing_Width=20;
boltholeradius=4;
boltheadradius=10;
boltholeCC=52*1;
footheight=16;
footwidth=23;
material=6;
chamfer=2;

//Bearing_Radius=rnd(7,25);
//Bearing_Width=rnd(10,30);
//boltholeradius=rnd(Bearing_Width/6,Bearing_Width/4 );
//boltheadradius=rnd(boltholeradius*1.3,boltholeradius*2);
//
//boltholeCC=rnd(Bearing_Radius *2 ,Bearing_Radius*4);
// footheight=rnd(Bearing_Radius/4 ,Bearing_Radius/2 );
//footwidth=rnd(1,Bearing_Radius/2 );
//material=rnd(3,Bearing_Radius/4 );
//chamfer=rnd(1,2);
//$fn=30;
bcc=max(boltholeCC,material*2+Bearing_Radius*2+boltheadradius*2);

 fw=max(boltheadradius*2,footwidth);

//Bearing radius
r=Bearing_Radius;
//Bearing width
w=Bearing_Width;
//Bolt radius
br=boltholeradius;
//Height flange ears
fh=footheight;
//Material thickness around bearing
bm=material;
//Material thickness around flange
m=material;
//Bolt distance
bd=boltholeCC/2;
//Go easy with deatil, minkowski sums ahead,
$fa=15*1;
cc=max(bd,r+bm+boltheadradius);
bar=fh;

rotate([0,0,170])color("LightSteelBlue")if (Orientation==1) rotate([0,0,30])flange();
else if(Orientation==0) rotate([0,0,30])standing();
else {
translate([0,-Bearing_Radius*1.6,0])standing();
 translate([0,Bearing_Radius*1.6,0])flange();}

module standing(){

 difference(){
translate([0,0,Bearing_Radius+material]){rotate([90,0,0])roundcyl(Bearing_Radius+material ,Bearing_Width  ,center=true);}
bearinghole();
}
difference(){
union(){
 translate([0,0,Bearing_Radius+material]){rotate([90,0,0])roundcyl(Bearing_Radius+material*0.5,Bearing_Width  ,center=true);}
 linear_extrude(material*2 ) {
 square([Bearing_Radius*2+material*2,min(Bearing_Width,fw)],center=true);}
union(){
 smallfoothouse();
hull(){
intersection(){smallfoothouse();
 hull(){
scale([1,5,1.5])foot();}
}
foot();}
}
mirror([1,0,0])union(){
 smallfoothouse();
hull(){
intersection(){smallfoothouse();
 hull(){
scale([1,5,1.5])foot();}
}
foot();}
}}

holes1();}
}

module holes1(){
//holes
bearinghole();

//bolt hole
translate([bcc*0.5,0,0])cylinder(footheight*2,boltholeradius,boltholeradius,center=true);
translate([-bcc*0.5,0,0])cylinder(footheight*2,boltholeradius,boltholeradius,center=true);

 hull(){
 translate([bcc*0.5,0,footheight*0.99])
roundcyl(boltheadradius ,chamfer*3 ,boltheadradius  );

 translate([bcc*0.5+boltheadradius*3,0,footheight*0.99+Bearing_Radius +material*2])
roundcyl(boltheadradius*2 ,Bearing_Radius*2 ,boltheadradius*4 );

translate([bcc+fw*0.5 ,0,footheight*0.99])
roundcyl(boltheadradius*2,Bearing_Radius ,boltheadradius*4 );
}
 mirror([1,0,0])hull(){
 translate([bcc*0.5,0,footheight*0.99])
roundcyl(boltheadradius ,chamfer*3 ,boltheadradius  );

 translate([bcc*0.5+boltheadradius*3,0,footheight*0.99+Bearing_Radius +material*2])
roundcyl(boltheadradius*2 ,Bearing_Radius*2 ,boltheadradius*4 );

translate([bcc+fw*0.5 ,0,footheight*0.99])
roundcyl(boltheadradius*2,Bearing_Radius ,boltheadradius*4 );
}

}
module bearinghole(){
translate([0,0,Bearing_Radius+material])rotate([90,0,0])roundcyl(Bearing_Radius,(Bearing_Width+chamfer*2)  ,center=true);
translate([0,-Bearing_Width*0.499,Bearing_Radius+material])rotate([90,0,0])roundcyl(Bearing_Radius+material*0.5,Bearing_Width ,Bearing_Radius*2+material*2 );
mirror([0,1,0])translate([0,-Bearing_Width*0.499,Bearing_Radius+material])rotate([90,0,0])roundcyl(Bearing_Radius+material*0.5,Bearing_Width ,Bearing_Radius*2+material*2);
}

module roundcyl(r,h,r2=0,center=false){
if(center==true)
rotate_extrude(convex=10){
 offset(delta=+chamfer,chamfer=true) offset(delta=-chamfer,chamfer=true)translate([0,-h*0.5])
polygon([[0,0],[r,0],[r2==0?r:r2,h],[0,h]]);
translate([0,-h*0.5])square([r*0.5,h]);

}
else
rotate_extrude(convex=10){
 offset(delta=+chamfer,chamfer=true) offset(delta=-chamfer,chamfer=true)translate([0,0])
polygon([[0,0],[r,0],[r2==0?r:r2,h],[0,h]]);
translate([0,0])square([r*0.5,h]);

}
}

module foot(){
intersection(){translate([Bearing_Radius+material,-fw*0.5,0])cube([(boltheadradius+bcc)*0.5,fw,footheight]);
 hull(){
linear_extrude(footheight
//-(fw-Bearing_Width)/2
){
 translate([bcc*0.5,0,0])circle(boltheadradius-chamfer);
 square([bcc  ,fw-chamfer*2],center=true);
 }

linear_extrude(footheight-chamfer ) {
 translate([bcc*0.5,0,0])circle(boltheadradius );
square([bcc  ,fw],center=true);

//translate([0,0,Bearing_Radius+material])rotate([90,0,0])roundcyl(Bearing_Radius +material,Bearing_Width ,center=true);
}}}}
module smallfoot(){
intersection(){translate([Bearing_Radius+material,-fw*0.5,0])cube([(boltheadradius+bcc)*0.5,fw,footheight]);
hull(){
linear_extrude(footheight
//-(fw-Bearing_Width)/2
)
offset(delta=-chamfer,chamfer=true)
offset(delta=+chamfer,chamfer=true)
 offset(delta=-chamfer,chamfer=true)
square([bcc ,fw],center=true);

linear_extrude(footheight-chamfer )  offset(delta=+chamfer,chamfer=true) offset(delta=-chamfer,chamfer=true)square([bcc ,fw],center=true);
//translate([0,0,Bearing_Radius+material])rotate([90,0,0])roundcyl(Bearing_Radius +material,Bearing_Width ,center=true);
}}}
module smallfoothouse(){
hull(){
smallfoot();

//linear_extrude(footheight)
////offset((fw-Bearing_Width)/2)
//offset(delta=(fw-Bearing_Width)/2,chamfer=true)square([bcc,Bearing_Width],center=true);

house();

}};
module house(){
intersection(){
 union(){translate([-material,-fw*0.5,Bearing_Radius]){
cube([(boltheadradius*2+bcc)*0.5,fw,(Bearing_Radius+material)*2]);}
translate([Bearing_Radius*0.5,-fw*0.5,0]){
cube([(boltheadradius+bcc)*0.5,fw,(Bearing_Radius+material)*2]);}
}
translate([0,0,Bearing_Radius+material])rotate([90,0,0])roundcyl(Bearing_Radius+material,Bearing_Width ,center=true);}
 linear_extrude(material  ) {
 translate([Bearing_Radius+material,0,0])square([Bearing_Radius ,Bearing_Width],center=true);}
}

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])
  ;

module flange(){

color("LightSteelBlue")
intersection(convexity=10){
 cylinder(max(fh ,w ),cc+br+m ,cc+br+m );

difference(){
union(){
minkowski(convexity=10){
linear_extrude(max(0.0001,bar-m),convexity=10)offset(-m*2)offset(m*2){
offset(max(0,(bm-m)))centerhouse();
hull(){
bolthouse();

}}
bullet(m);
}

minkowski(){
linear_extrude(max(0.0001,min(bar-m*2,max(m,bar*0.5-m))),convexity=10)offset(-m*2)offset(m*2)hull(){
bolthouse();
offset(max(0,(bm-m)))centerhouse();
}bullet(m);}

 hull(){
minkowski(){
linear_extrude(max(0.0001,w-bm),convexity=10){centerhouse();}
bullet(bm);}

minkowski(){
linear_extrude(max(0.0001,bar-m),convexity=10){
offset(-m*2)offset(m*2)offset(max(0,(bm-m)))
centerhouse(); }bullet(m);
}

}

}

 linear_extrude(w*3+fh,center=true,convexity=10)centerhole();
 linear_extrude(w*3+fh,center=true,convexity=10)bolthole();
}
 }

}

module centerhouse()
{
circle(r);
}
module centerhole()
{
circle(r);
}
module centerbolthouse()
{
circle(br+m);
}
module bolthole()
{
translate([cc,0,0])circle(br);
translate([-cc,0,0])circle(br);
}

module bolthouse()
{
translate([cc,0,0])circle(br);
translate([-cc,0,0])circle(br);
}

module bullet(m)
{
 rotate_extrude($fn=12,convexity=10) union(){
square([m*(2/3),m ]);
square([m ,m*(2/3)]);
intersection(){
$fn=16;
square(m,m,m);

translate([m*(2/3),m*(2/3),0])circle(m/3);
}}}
```


[User]
Okay, I'm looking to create a parametric control horn for my RC plane, and I'd like it to be customizable in terms of size, hole placement, and base options. I saw this design online that looks pretty close to what I need. I'd like to have the following parameters:

**Horn Dimensions:**

*   `horn_height`: The vertical height of the horn, measured from the top of the base (or where the base would be) to the top of the horn.
*   `horn_width`: The width of the horn.
*   `horn_thickness`: The thickness of the horn itself.
*   `horn_elevate_tab_height`: The height of the tab-like section of the horn that joins the base.
*   `horn_corner_radius`: The radius for the rounded corners on the front top and back of the horn.

**Pushrod Holes:**

*   `holes_count`: The number of pushrod holes in the horn.
*   `holes_diameter`: The diameter of the pushrod holes.
*  `holes_radius`: Calculated as `holes_diameter/2`
*   `holes_top_offset`: The space between the top of the horn and the top hole.
*   `holes_bottom_offset`: The space between the bottom of the horn and the bottom hole.
*   `holes_back_offset`: The space between the back of the horn and the center of the holes.
*   `holes_spacing`: The calculated spacing between the holes, based on the overall horn height and offsets (should be automatically calculated based on the other params).

**Base Options:**

*   `base_attached`: A boolean or similar to indicate whether the base is attached to the horn or detached. This should be a dropdown with "yes" or "no" options.
*   `base_thickness`: The thickness of the base.
*   `base_hole_diameter`: The diameter of the screw holes in the base.
*  `base_hole_radius`: Calculated as `base_hole_diameter/2`.
*   `base_hole_offset`: The offset from the sides of the base to the screw holes.
*   `base_width`: The width of the base.
*   `base_length`: The length of the base.
*   `base_corner_radius`: Radius for the rounded corners on the base.
*   `base_fillet_on`: A boolean or similar to control if there is a fillet connecting the horn and the base, should be "yes" or "no" option in dropdown.
*   `base_fillet_radius`: The radius of the fillet between the base and the horn.
*  `base_tab_offset`: This is the distance between the edge of a detached base and the slot that will attach to the horn.
* `base_tab_extra_space`: Extra space added to the slot in a detached base to give tolerance for printing.

**Bottom Base:**
* `bottom_base_hole_diameter`: Diameter of the holes on the bottom base for screws.
*  `bottom_base_hole_radius`: Calculated as `bottom_base_hole_diameter/2`.

**Output Control:**

*   `part`: A dropdown option to select which parts of the design you want to see. The options should include "horn", "base", and "both".

I'd like to make sure the design has a few important characteristics:

*   The horn and base should be separate modules in the code to make it clean.
*   When the `base_attached` parameter is "no", the base should be detached and have a slot for the horn to slide in. It would be great if the slot was slightly larger than the horn for tolerance reasons.
*   When the base is detached, the base screws should not cut through into the horn slot.
*   The bottom base should be located off to the side, so it does not intersect the other parts and can be mounted to the plane.

I want to have all of the parts be created from scratch. I would also like to avoid any reliance on external libraries.

I think that covers everything for my control horn design.  Thanks so much!

[Assistant]
ControlHorn.scad:
```
// preview[view:south west, tilt:top diagonal]

$fs = 0.01;

///// USER PARAMETERS /////

// Which one would you like to see?
part = "both"; // [horn:Horn Only, base:Bottom Base Only, both:Horn and Bottom Base]

/* [Horn] */

horn_height = 25; //measured from top of base vertically to top of horn
horn_width = 25;
horn_thickness = 1.5;
// this is the part under the triangular part that joins to the base
horn_elevate_tab_height = 3;
// rounding on front top and back of horn
horn_corner_radius = 3;

/* [Pushrod Holes] */

holes_count = 5;
holes_diameter = 1.5;
holes_radius = holes_diameter/2;
// space between top of horn and top hole
holes_top_offset = 1.5;
// space between bottom of horn and bottom hole
holes_bottom_offset = 1.5;
// space between back of horn and holes
holes_back_offset = 2;

/* [Base] */
base_attached = "yes"; //[yes,no]
base_thickness = 1.5;
base_hole_diameter = 2;
// offset from sides of base to place screw holes
base_hole_offset = 1;
base_hole_radius = base_hole_diameter/2;
base_width = 10;
base_length = 15;
base_corner_radius = 1;
// creates a fillet between the base and the horn
base_fillet_on = "yes"; //[yes,no]
base_fillet_radius = 1;
// for detached base only - offset from side of base to start/end slot for perpendicular horn
base_tab_offset = 2;
// for detached base only - extra space to cut in slot to give tolerance
base_tab_extra_space = 0.01;

/* [Bottom Base] */
// This is where the screws will be drilled into
bottom_base_hole_diameter = 1;
bottom_base_hole_radius = bottom_base_hole_diameter/2;

holes_spacing = (horn_height - holes_top_offset - holes_bottom_offset - horn_elevate_tab_height - 2*holes_radius) / (holes_count-1);

//////////////////////////////
//////     MODULES       /////
//////////////////////////////

module horn(){
    translate([0,0,-horn_thickness/2])
    hull(){
        intersection(){
            translate([0,horn_elevate_tab_height,0])
                cube([horn_width,horn_height ,horn_thickness]);
            translate([horn_corner_radius,horn_elevate_tab_height,0])
                cylinder(r=horn_corner_radius, h=horn_thickness);
        }
        translate([horn_width-horn_corner_radius,horn_corner_radius+horn_elevate_tab_height,0])
            cylinder(r=horn_corner_radius, h=horn_thickness);
        translate([horn_width-horn_corner_radius,horn_height-horn_corner_radius,0])
            cylinder(r=horn_corner_radius, h=horn_thickness);
    }
}

module horn_holes(){
    for(i=[0:1:holes_count-1]){
        x = horn_width-holes_radius-holes_back_offset;
        y = horn_height-holes_radius-holes_top_offset - holes_spacing*i;
        echo(y);
        translate([x,y,-horn_thickness/2-1])
            cylinder(r=holes_radius, h=horn_thickness+2);
    }
}

module elevate_tab(){
    difference(){
        translate([0,-horn_thickness/2,-base_thickness])
            cube([base_length,horn_thickness,horn_elevate_tab_height+base_thickness]);
        if(base_attached=="no"){
            translate([-1,-horn_thickness/2-1,-base_thickness-1])
                cube([base_tab_offset+1,horn_thickness+2,base_thickness+1]);
            translate([base_length-base_tab_offset,-horn_thickness/2-1,-base_thickness-1])
                cube([base_tab_offset+1,horn_thickness+2,base_thickness+1]);
        }
    }

}

module screw_base(cut_through_ok=true){
    //translate([0,-base_width/2,-base_thickness])
    //cube([base_length,base_width,base_thickness]);
    difference(){
        translate([base_corner_radius,-base_width/2,-base_thickness])
            hull(){
                translate([0,0,0])
                    cylinder(r=base_corner_radius, h=base_thickness);
                translate([0,base_width,0])
                    cylinder(r=base_corner_radius, h=base_thickness);
                translate([base_length-2*base_corner_radius,0,0])
                    cylinder(r=base_corner_radius, h=base_thickness);
                translate([base_length-2*base_corner_radius,base_width,0])
                    cylinder(r=base_corner_radius, h=base_thickness);
            }
        if(base_attached=="no" && cut_through_ok){
            translate([ base_tab_offset+base_tab_extra_space-base_tab_extra_space*2,
                        -horn_thickness/2-base_tab_extra_space,
                        -base_thickness-1 ])
                cube([  base_length-base_tab_offset*2+base_tab_extra_space*2,
                        horn_thickness+base_tab_extra_space*2,
                        base_thickness+2 ]);
        }
    }
}

module base_holes(hole_radius=base_hole_radius){
    translate([ base_hole_radius+base_hole_offset,
                -base_width/2+base_hole_offset-base_hole_radius+base_hole_radius,
                -base_thickness-1 ])
        cylinder(r=hole_radius, h=base_thickness+2);

    translate([ base_hole_radius+base_hole_offset,
                base_width/2-base_hole_offset+base_hole_radius-base_hole_radius,
                -base_thickness-1 ])
        cylinder(r=hole_radius, h=base_thickness+2);

    translate([ base_length-base_hole_radius-base_hole_offset,
                -base_width/2+base_hole_offset-base_hole_radius+base_hole_radius,
                -base_thickness-1 ])
        cylinder(r=hole_radius, h=base_thickness+2);

    translate([ base_length-base_hole_radius-base_hole_offset,
                base_width/2-base_hole_offset+base_hole_radius-base_hole_radius,
                -base_thickness-1 ])
        cylinder(r=hole_radius, h=base_thickness+2);
}

module base_fillet(){
    difference(){
        translate([0,horn_thickness/2,0])
            cube([base_length,base_fillet_radius,base_fillet_radius]);
        translate([-1,horn_thickness/2+base_fillet_radius,base_fillet_radius])
        rotate([0,90,0])
            cylinder(r=base_fillet_radius, h=base_length+2);
    }
    difference(){
        translate([0,-horn_thickness/2-base_fillet_radius,0])
            cube([base_length,base_fillet_radius,base_fillet_radius]);
        translate([-1,-horn_thickness/2-base_fillet_radius,base_fillet_radius])
        rotate([0,90,0])
            cylinder(r=base_fillet_radius, h=base_length+2);
    }

}

module bottom_screw_base(){
    translate([  horn_width+5,
                -base_thickness/2,
                base_width/2+base_corner_radius ])
    rotate([90,0,0])
    difference(){
        screw_base(false);
        base_holes(bottom_base_hole_radius);
    }
}

module separate_screw_base(){
    translate([ horn_width+5,
                -base_thickness/2,
                base_width/2+base_corner_radius+base_width+5 ])
    rotate([90,0,0])
    difference(){
        screw_base();
        base_holes();
    }
}

//////////////////////////////
//////    BUILD MODEL    /////
//////////////////////////////

if(part=="horn" || part=="both"){
    rotate([90,0,0])
        difference(){
            // Create horn arm
            //translate([horn_corner_radius,horn_corner_radius,-horn_thickness/2])
            horn();
            horn_holes();
        }
    elevate_tab();
        if(base_attached=="yes"){
            difference(){
                screw_base();
                base_holes();
            }
            if(base_fillet_on=="yes"){
                base_fillet();
            }
        }
        if(base_attached=="no"){
            separate_screw_base();
        }
}

if(part=="base" || part=="both"){
    bottom_screw_base();
}

```


[User]
Hey, I'm looking to create a customizable counter using OpenSCAD, and I think I need some help designing it. I've seen examples of these kind of counters, and I want to make one with three interlocking rings, each with numbers. The outer and inner rings have numbers printed on their surface, and there's a middle ring that has a little pip or pointer that indicates the current numbers on the other rings.

Here are the basic parameters I'm thinking of:

*   **Ring Spacing:** I need a small gap between the rings to allow them to rotate. This needs to be adjustable to account for different printers.
*   **Outer Diameter:** The overall diameter of the counter, which would be the outer ring's diameter.
*   **Outer Ring Numbers:** I need to be able to specify the starting and ending numbers for the outer ring.
*   **Inner Ring Numbers:**  I also need the ability to set the start and end numbers for the inner ring.
*   **Disc Height/Thickness:** The thickness of all the rings.
*   **Text Size:** The size of the numbers.
*   **Text Height:** How far the numbers stand out from the ring's surface.
*   **Text Margin:** Space between the bottom of the numbers and the edge of the ring.
*   **Pip Radius:** The size of the pointer/pip.
*   **Foot Cut Radius:** A cut out of the bottom edge of the rings where they interlock to prevent welding.

I would also like to create a dimple in the inner ring to keep it centered on the main body. This would be a spherical indent, and should also be parametrically adjustable.

Can you generate an OpenSCAD file (or files, if it makes sense to organize it that way) for me based on these parameters? I don't need any special libraries at this point, just the basic built in functions. Let me know if you have any questions!

[Assistant]
custom_counter.scad:
```
// The space between each ring. This should be set to the minimum tolerance you can print and still separate so that the rings can move but with engouh resistance that they stay set.
slip_spacing = 0.4;

// Diameter of the outer ring. This is the maximum diameter of the part.
outer_dia = 60;

// Lowest number on the outer ring. This will normally be 1 or 0.
outer_start = 1;

// Highest number on the outer ring
outer_end = 20;

// Lowest number on the inner ring.
inner_start = 0;

// Highest number on the inner ring.
inner_end = 6;

// Height/thickness of the disc
disc_h = 5;

// Height of the font
text_size = 4.5;

// Thickness of the text. This is how high above the disc the numbers will be raised.
text_h = 0.8;

// Space between the bottom of the numbers and the outer perimiter of the ring
text_margin_bottom = 2;

// Radius of the pip indicating the current value
pip_r = 1.5;

// How much to cut out of the bottom edge at the ring interfaces. This helps avoid welding on the first layer.
foot_cut_r = 1;

outer_cut_r = outer_dia/2 - text_size - text_margin_bottom;
mid_cut_r = outer_cut_r - disc_h/2 - pip_r*2;

inner_dia = mid_cut_r*2 - slip_spacing*2 - disc_h/2;

dimple_sr = outer_dia/2;
dimple_cr = inner_dia/2 - text_size - text_margin_bottom - 0.4;
dimple_h = dimple_sr * cos(asin(dimple_cr/dimple_sr)) + disc_h;

module cut_numbers(start, end, z, dia) {
	count = abs(end-start);
	step = 360 / (count + 1);
	for (i = [start:end]) {
		rotate([0,0,step * i]) translate([0,text_margin_bottom - dia/2,z - 0.1])
			linear_extrude(height = text_h + 0.1)
				text(str(i), text_size, halign="center", valign="bottom", font="style:bold");
	}
}

module bicone(r, z) {
	translate([0,0,z]) rotate_extrude($fn=40)
		polygon([[0,-r], [r,0], [0,r]]);
}

module foot_cut(r) {
	translate([0,0,-2])
		cylinder(h=disc_h/2 + 2, r=r - disc_h/2 + foot_cut_r);
}

// Outer ring
difference() {
	union() {
		cylinder(h=disc_h, d=outer_dia);
		cut_numbers(outer_start, outer_end, disc_h, outer_dia);
	}

	// translate([0,0,-1])
	// 	cylinder(h=disc_h + 2, r=outer_cut_r);

	bicone(outer_cut_r, disc_h/2);

	foot_cut(outer_cut_r);
}

// Pip ring
union() {
	difference() {
		intersection() {
			cylinder(h=disc_h, d=outer_dia);
			bicone(outer_cut_r - slip_spacing, disc_h/2);
		}

		bicone(mid_cut_r, disc_h/2);

		translate([0,mid_cut_r, disc_h])
			sphere(pip_r, $fs=0.5);

		foot_cut(mid_cut_r);
	}

	difference() {
		translate([0,0,disc_h])
			cube([outer_cut_r*2 - slip_spacing*2 - disc_h - 0.5, 2, 1.5], center=true);

		cylinder(r=mid_cut_r - disc_h/2 + 0.5, h = disc_h*2);
	}
}

// Inner ring
union() {
	difference() {
		intersection() {
			cylinder(h=disc_h, d=outer_dia);
			bicone(mid_cut_r - slip_spacing, disc_h/2);
		}

		translate([0,0,dimple_h])
			sphere(r=dimple_sr, $fa=0.01, $fs=1);
	}

	rotate([0,0,360/14])
			cut_numbers(inner_start, inner_end, disc_h, inner_dia);
}

```


[User]
I'm looking to design a parametric cable clip, and I'd like to use OpenSCAD to do it. I have a specific design in mind, based around the idea of intersecting two profiles.

The clip itself will be formed by the intersection of two extruded shapes: one is a sort of "U" shape, and the other is a rectangular bar with two small cylindrical cutouts. The "U" shape will have rounded corners at the ends of the "U", created by offsetting and hulling circles. There will be an additional rectangle at the base of the "U".

Here are the parameters I'd like to control:

*   `r`: The radius of the rounded corners of the "U" shape, and the base circles for the hull.
*   `w`: The width of the overall "U" shape
*   `h`: The height of the rectangular bar and the total height of the "U" shape before extrusion.
*   `m`: A small amount of extra material to add for tolerance on the "U" shape and the base rectangle for the "U" shape.
*  `hr`: Radius of the circular cutouts on the rectangle that forms a hole for the cable
*  `rd`:  Radius of offset for the rectangle

I'd also like the ability to display the construction geometry, i.e. the two extruded shapes before intersection, as well as the final shape.  I envision having a `showconstruction` parameter that defaults to 0, but will cause the two extruded shapes to be drawn if set to 1, with the "U" shape in yellow and the rectangular bar in red. This will help me visualize how the design is being built.

I'm not currently using any external libraries but would be open to including one if that would simplify things.

Ultimately, I want a single .scad file that allows me to adjust those parameters and outputs both the final clip and optional construction geometry.  Could you help me generate the code for that?

[Assistant]
clip.scad:
```
showconstruction=1;//[1:yes,0:no]
r = 5;
w = 25;
h = 10;
m = 2;
hr = 1;
$fn = 50;
rd = 2;

intersection() {
    color("BlanchedAlmond")
linear_extrude(h*3,center=true, convexity = 10) a();
color("NavajoWhite")
 rotate([90, 0, 180])
    linear_extrude(r*5+ m,center=true,  convexity = 10) b();
}

if (showconstruction==1){
color("red")translate([0,r,0])
rotate([90, 0, 180])
linear_extrude(r*4,center=true, , convexity = 10) b();
color("yellow")translate([0,0,h/2]) linear_extrude(h*3,center=true, convexity = 10) a();
}

module a(){
      offset(-m*0.4 ) {
      offset(m*0.8) offset(-m *0.4) { difference() {
    intersection() {
      translate([-w / 2, 0])
      square([w, r * 2 + m]);
      union() {
        translate([-w / 2, 0])
        square([w, m]);
        hull() {
          translate([0, r])
          circle(r + m);
          translate([0, -r])
          circle(r + m);
        }
      }
    }
    hull() {
      translate([0, r])
      circle(r);
      translate([0, -r])
      circle(r);
    }
  }}}}

module b(){
    difference() {
      offset(rd) {
        offset(-rd) {
          translate([-w / 2, 0])
          square([w, h]);
        }
      }
      translate([(r + m + w / 2) / 2, h / 2])
      circle(hr);
      translate([-(r + m + w / 2) / 2, h / 2])
      circle(hr);
    }
  }

```


[User]
I'd like a parametric OpenSCAD design for a hand spinner. I want to be able to specify:

*   The length of the spinner arms.
*   The number of arms.
*   Two radii for creating the body.  Think of it like creating a circular ring with a given width, and then using that to define the basic shape of the spinner. The two radii specify the inner and outer edges of this ring and determine the width of the main body of the spinner.

I want to be able to render it in either 2D or 3D. In 3D, I'd like the main body to be extruded, and also have the option to render bearings as well (one in the center and one at the end of each arm). The bearings should be a standard type of bearing, with balls inside and should include color.

[Assistant]
handspinner.scad:
```
Visualisation = "2D";//[2D,3D]
Previsualisation = "oui";//[oui,non]
Longueur_de_bras = 25;
Nombre_de_bras = 3;
Arrondi_1 = 15;
Arrondi_2 = 10;

if(Visualisation=="2D")
{
  handspinner(l=Longueur_de_bras,b=Nombre_de_bras,a1=Arrondi_1,a2=Arrondi_2);
}
else
{
    translate([0,0,-2.5])
  linear_extrude(5)
  handspinner(l=Longueur_de_bras,b=Nombre_de_bras,a1=Arrondi_1,a2=Arrondi_2);
  if(Previsualisation=="oui")
  {
    roulement();
    for(i=[1:Nombre_de_bras])
    {
      rotate([0,0,360/Nombre_de_bras*i])
      translate([Longueur_de_bras,0,0])
      roulement();
    }
  }
}

module handspinner()
{
  a1 = a1<=a2 ? a2+1 : a1;
  translate([0,0,-2.5])
  difference()
  {

    offset(-a2,$fn=64)
    offset(a1,$fn=64)
    union()
    {
      circle(d=20,center=true);
      for(i=[1:b])
      {
        rotate([0,0,360/b*i])
        translate([l,0,0])
        circle(d=20,center=true);
      }
      for(i=[1:b])
      {
        rotate([0,0,360/b*i])
        square([l,0.1]);
      }

    }

    circle(d=20,center=true);
      for(i=[1:b])
      {
        rotate([0,0,360/b*i])
        translate([l,0,0])
        circle(d=20,center=true);
      }

  }

}

module roulement()
{
    color([0.1,0.1,0.1,1])
    {
    difference()
    {
        cylinder(d=20,h=5,center=true);
        cylinder(d=18,h=20,center=true);
    }
    difference()
    {
        cylinder(d=11,h=5,center=true);
        cylinder(d=9,h=20,center=true);
    }
    }
    color([0.8,.8,0.8,1])
    for(i=[0:8])
    {
        rotate([0,0,360/8*i])
        translate([7.25,0,0])
        sphere(d=5.5);
    }
}

```


[User]
I'm looking to design a customizable bearing cap for a standard 608 bearing, like the ones used in fidget spinners. I'd like the cap to have a few different options for the top surface, including:

1.  **Debossed Text:** I want to be able to specify text that is recessed into the surface of the cap.
2.  **Embossed Text:** I also want to be able to specify text that protrudes from the surface of the cap.
3.  **Cat Shape:** A stylized cat head shape, similar to the one in the provided example.
4.  **Paw Print:** A paw print design.
5.  **Heart Shape:** A simple heart shape.
6.  **Star Shape:** A five-pointed star.
7.  **Yin-Yang Symbol:** The classic yin-yang symbol.

For all of these options, I need to be able to adjust the overall size and thickness of the cap. The central bore for the bearing should always be sized for a 608 bearing (22mm outer diameter, 8mm inner diameter, and 7mm height). The cap should also include a cylindrical spacer that fits between the cap and the bearing to prevent wobble. I'd also like to define a parameter to change the font size for the embossed/debossed text. It would be great if you could also use `Open Sans:style=ExtraBold` for the font.

I'd like the design to be fully parametric, so I can adjust all of the dimensions easily. I'd like to use the minkowski function to get the rounded edges. Also, for the cat design, I need to include whiskers, nose, eyes, and a mouth, similar to the given example. I need to use the `star2d` module for the star shape, along with its accompanying functions for polar coordinates and increment calculations.

The main design has a diameter of 18.5mm, a disk height of 2.5mm, a spacer height of 1mm, and the post that goes into the bearing should have half the height of the bearing itself (3.5mm). The post has a diameter of 8mm.

Can you create a set of OpenSCAD files that implement all of these features?

[Assistant]
bearing-cap.scad:
```
// customizable bearing cap
// lucina
// 2017-07-03
// preview[view:north, tilt:bottom]
/* [bearing cap settings] */
// number of cats for the spinner
choice = "deboss text";   //[deboss text, emboss text, cat, paw, heart, star, yin-yang]
text = "LPM";
scaleText = 1; // [.1:.1:2.5]

/* [hidden] */
$fn = 60;
x = 0; y = 1; z = 2; id = 3;
thick = 3;
weight = [18, 18, 2];
bearing608 = [22, 22, 7, 8];
resolution = 60;
diskH = 2.5;
diskD = 18.5;
spacerH = 1;
postH = 8/2;

bearing = bearing608;
filRad = .75;
//ff = .56;
ff = .7;
//ff2 = .35;
ff2 = .42;

ffpaw = .21;
ff2paw = .28;
ffx = .75;
pos = [60, 21, -21, -60];
off = [.28, .29, .29, .28];

font = "Open Sans:style=ExtraBold";

module fcylinder(z, x, rad) {
   translate([0, 0, rad-z/2])
      minkowski() {
         cylinder(h=z-2*rad, d=x-2*rad);
         sphere(rad);
      }
}
module ftriangle(z, x, rad) {
   translate([0, 0, rad-z/2])
      minkowski() {
         cylinder(h=z-2*rad, d=x-2*rad, $fn = 3);
         sphere(rad);
      }
}
 module embossText(txt, ht, fontSize) {
   difference() {
      fcylinder(ht, diskD, filRad);
      translate([0, 0, ht/2])
         linear_extrude(ht, center=true)
            text(str(txt), font = font, size = fontSize, halign="center", valign="center");
   }
}
 module debossText(txt, ht, fontSize) {
   difference() {
      fcylinder(ht, diskD, filRad);
      translate([0, 0, ht/2])
         fcylinder(ht, diskD*.9, filRad);
   }
   linear_extrude(ht, center=true)
       text(str(txt), font = font, size = fontSize, halign="center", valign="center");
 }
module cat(wid, ht) {
   difference() {
      union() {
         fcylinder(ht, wid, filRad);
         translate([-(wid/4), wid/3, 0])
            difference() {
               ftriangle(ht, wid*ff, filRad);
               union() {
                  translate([0, 0, ht/2])
                     linear_extrude(height=2, convexity=10, center=true)
                        circle(d=wid*ff2, $fn=3);
               }
            }
         translate([wid/4, wid/3, 0])
            rotate([0, 0, -60])
               difference() {
                 ftriangle(ht, wid*ff, filRad);
                 union() {
                     translate([0, 0, ht/2])
                        linear_extrude(height=2, convexity=10, center=true)
                           circle(d=wid*ff2, $fn=3);
                 }
            }
      }
      union() {
            translate([0, -.12*wid, 0])
               whiskers(wid, ht);
            nose(wid, ht);
            eyes(wid, ht);
            mouth(wid, ht);
         }
   }

}
module nose(wid, ht) {
   translate([0, -.10*wid, ht/2])
      difference() {
      cylinder(h=2, d=.16*wid, center=true);
         union() {
            translate([-.04*wid, -.07*wid, 0])
               cylinder(h=4, d=.06*wid, center=true);
            translate([.04*wid, -.07*wid, 0])
               cylinder(h=4, d=.06*wid, center=true);
         }
      }
}
module eyes(wid, ht) {
   union() {
      translate([-.15*wid, .08*wid, ht/2])
         intersection() {
            translate([.05*wid, 0, 0])
               cylinder(h=2, d=.2*wid, center=true);
            translate([-.05*wid, 0, 0])
               cylinder(h=2, d=.2*wid, center=true);
         }
      translate([.15*wid, .08*wid, ht/2])
         intersection() {
            translate([.05*wid, 0, 0])
               cylinder(h=2, d=.2*wid, center=true);
            translate([-.05*wid, 0, 0])
               cylinder(h=2, d=.2*wid, center=true);
         }
   }
}
module mouth(wid, ht) {
   translate([-.07*wid, -.20*wid, ht/2])
   difference() {
      cylinder(h=2, d=.18*wid, center=true);
      union() {
         translate([0, .1*wid, 0])
            cube([.22*wid, .2*wid, 4], center=true);
         scale([1.6, 1, 1])
            cylinder(h=2, d=.18*wid-2*1.5, center=true);
      }
   }
   translate([.07*wid, -.20*wid, ht/2])
      difference() {
         cylinder(h=2, d=.18*wid, center=true);
         union() {
            translate([0, .1*wid, 0])
               cube([.22*wid, .2*wid, 4], center=true);
            scale([1.6, 1, 1])
            cylinder(h=2, d=.18*wid-2*1.5, center=true);
         }
      }
}
module whiskers(wid, ht) {
   difference() {
      union() {
         translate([0, 0, ht/2])
            union() {
               cube([wid+2*thick, 1.5, 2], center=true);
               rotate([0, 0, 20])
                  cube([wid+2*thick, 1.5, 2], center=true);
               rotate([0, 0, -20])
                  cube([wid+2*thick, 1.5, 2], center=true);
            }
      }
      cylinder(h=ht, d=.5*wid, center=true);
   }
}
module solidPaw(wid, ht) {
   echo("solidPaw", wid, ht);
   union() {
      for (a=[0:1:3]) {
         rotate([0, 0, pos[a]]) {
            translate([0, off[a]*wid, 0])
               scale([ffx, 1, 1])
                  cylinder(ht, d=wid*ffpaw, center=true);
         }
     }
      translate([0, -.07*wid, 0])
         cylinder(h=ht, d=1.3*wid*ff2paw, center=true);
      hull() {
         translate([-wid*ff2paw/2.1, -.9*wid*ffpaw, 0])
            cylinder(h=ht, d=wid*ff2paw, center=true);
         translate([wid*ff2paw/2.1, -.9*wid*ffpaw, 0])
            cylinder(h=ht, d=wid*ff2paw, center=true);
     }
  }
}

module deboss(wid, ht) {
   height = ht;
   difference() {
      fcylinder(height, wid, filRad);
      translate([0, 0, height/2])
         cylinder(h=height, d=wid*.9, center=true);
   }
   solidPaw(wid, height);
}

module heart(w, ht) {
   wid = w*.45;
   difference() {
      fcylinder(ht, w, filRad);
      translate([0, 0, ht/2])
         cylinder(h=ht, d=w*.9, center=true);
   }
   translate([0, -.2*wid, 0])
      rotate([0, 0, 45])
         union() {
            cube([wid, wid, ht], center=true);
            translate([0, .52*wid, 0])
               rotate([0, 0, -10])
                  cylinder(h=ht, d=wid, center=true);
            translate([.52*wid, 0, 0])
               rotate([0, 0, 100])
                  cylinder(h=ht, d=wid, center=true);
         }
}
module star(wid, ht) {
   difference() {
      fcylinder(ht, wid, filRad);
      translate([0, 0, ht/2])
         cylinder(h=ht, d=wid*.9, center=true);
   }
   linear_extrude(height = ht, center = true, convexity=10)
      star2d(5, wid*.85/2, wid*.35/2);
}
module star2d(points, outer, inner, ht) {
	// polar to cartesian: radius/angle to x/y
	function x(r, a) = r * cos(a);
	function y(r, a) = r * sin(a);
	// angular width of each pie slice of the star
	increment = 360/points;
	union() {
		for (p = [0 : points-1]) {
			// outer is outer point p
			// inner is inner point following p
			// next is next outer point following p
			x_outer = x(outer, increment * p);
			y_outer = y(outer, increment * p);
			x_inner = x(inner, (increment * p) + (increment/2));
			y_inner = y(inner, (increment * p) + (increment/2));
			x_next  = x(outer, increment * (p+1));
			y_next  = y(outer, increment * (p+1));
         polygon(points = [[x_outer, y_outer], [x_inner, y_inner], [x_next, y_next], [0, 0]], paths  = [[0, 1, 2, 3]]);
			}
		}
}
module yin(wid, ht) {
   outerR = wid/2*.9;
   difference() {
      fcylinder(ht, wid, filRad);
      union() {
         doYin(wid, ht);
         translate([0, -outerR/2, ht/2])
            cylinder(h = ht, r = outerR/2*.3, center=true);
      }
   }
   translate([0, outerR/2, 0])
      cylinder(h = ht, r = outerR/2*.3, center=true);
}
module doYin(wid, ht) {
   outerR = wid/2*.9;
   translate([0, 0, ht/2])
      union() {
         difference() {
            cylinder(h = ht, r = outerR, center = true);
            union() {
               translate([0, -(outerR/2), 0])
                  cylinder(h = ht*3, r = outerR/2, center=true);
               translate([outerR/2, 0, 0])
                  cube([outerR, 2*outerR, ht*3], center=true);
            }
         }
         translate([0, outerR/2, 0])
            cylinder(h = ht, r = outerR/2, center=true);
      }
}

if ( choice == "cat" )
   translate([0, 0, -diskH/2])
      rotate([0, 180, 0])
         cat(diskD, diskH);
if ( choice == "paw" )
   translate([0, 0, -diskH/2])
      rotate([0, 180, 0])
         deboss(diskD, diskH);
if ( choice == "heart" )
   translate([0, 0, -diskH/2])
      rotate([0, 180, 0])
         heart(diskD, diskH);
if ( choice == "star" )
   translate([0, 0, -diskH/2])
      rotate([0, 180, 0])
         star(diskD, diskH);
if ( choice == "yin-yang" )
   translate([0, 0, -diskH/2])
      rotate([0, 180, 0])
         yin(diskD, diskH);
if ( choice == "emboss text" )
   translate([0, 0, -diskH/2])
      rotate([0, 180, 0])
         embossText(text, 3, scaleText*5);
if ( choice == "deboss text" )
   translate([0, 0, -diskH/2])
      rotate([0, 180, 0])
         debossText(text, 3, scaleText*5);
// spacer
translate([0, 0, spacerH/2])
   cylinder(h=spacerH, d=10, center=true);
// post
translate([0, 0, bearing[z]/4+spacerH])
   cylinder(h=bearing[z]/2, d=bearing[id], center=true);

```


[User]
Hey, I'm looking to create a parametric diamond model for jewelry design using OpenSCAD. I've got some basic parameters in mind and a general idea of the facets, but I need help generating the code.

I need the diamond to have a crown, pavilion, and a table. I’d like to control the overall size and proportions using these parameters:

*   **`Color_Red`**, **`Color_Green`**, **`Color_Blue`**: Integer values ranging from 0 to 255, used for setting the color of the diamond.
*   **`Color_Alpha`**: A float value between 0 and 1 (using .1 increments), determining the transparency of the diamond.
*   **`Crown_Height`**: A float that controls the height of the crown, between 14 and 19.2 with 0.1 increments.
*   **`Pavilion_Depth`**: A float between 40 and 43.4, with 0.1 increments controlling the depth of the pavilion.
*   **`Table_Diameter`**: A float between 53 and 59, with 0.1 increments for controlling the diameter of the table.
*   **`Crown_Angle`**: A float between 34 and 41.1, with 0.1 increments for the angle of the crown facets.
*   **`Pavilion_Angle`**: A float between 39.7 and 41.7, with 0.1 increments for the angle of the pavilion facets.

The diamond needs to have the following facets, and I will want to adjust the angles and positions later, so please do it parametrically:

*   **Table:** A flat top surface.
*   **Crown Facets:**
    *   **Kite Facets:** 8 kite-shaped facets around the table.
    *   **Star Facets:** 8 star-shaped facets between the kite facets.
    *   **Upper Girdle Facets:** 16 facets along the girdle between crown and pavilion, both above and below the girdle.
*   **Pavilion Facets:**
    *   **Main Facets:** 8 main facets on the pavilion.
    *   **Lower Girdle Facets:** 16 facets at the bottom of the pavilion, both above and below the girdle.
*   **Culet:** A small point at the bottom of the pavilion.

I will also need to include a very small cylinder as a base to act as a reference for placing the diamond.

Could you generate the OpenSCAD code for this design? I'm not using any external libraries for this model.

[Assistant]
diamond.scad:
```
Color_Red=240; // [0:255]
Color_Green=10; // [0:255]
Color_Blue=10; // [0:255]
Color_Alpha=.9; // [0:.1:.9]
Crown_Height=19.2; // [14:.1:19.2]
Pavilion_Depth=41.5; // [40:.1:43.4]
Table_Diameter=56.1; // [53:.1:59]
Crown_Angle=41.1; // [34:.1:41.1]
Pavilion_Angle=39.7; // [39.7:.1:41.7]
//$vpr=[60,0,30];
//$vpd=67;

color([Color_Red/255,Color_Green/255,Color_Blue/255,Color_Alpha])difference(){
translate([0,0,-.00001])cylinder(d=10,h=7,$fn=16*3);
//Table
translate([-6,-6,Crown_Height/10+.9+Pavilion_Depth/10])cube(12);
//Crown
//Kite Fasets
for(i=[0:7])
rotate([0,0,i*45])translate([-6,Table_Diameter/20,Crown_Height/10+.9+Pavilion_Depth/10])rotate([Crown_Angle-90])cube(12);
//star Fasets
for(i=[0:7])
rotate([0,0,i*45+22.5])translate([-6,Table_Diameter/20*cos(22.5),Crown_Height/10+.9+Pavilion_Depth/10])rotate([Crown_Angle-73])cube(12);
//Upper Girdle Fasets
for(j=[-1,1])for(i=[0:7])
rotate([0,0,i*45+j*6])
translate([0,-5,Pavilion_Depth/10+.2689])
rotate([100.66+Crown_Angle,0,0])translate([-6,0,-12])cube(12);
//culet
translate([0,0,-1])cube(2,true);

//Pavilion
//Main Facets
for(i=[0:7])
rotate([0,0,i*45])
translate([0,-5,Pavilion_Depth/10])
rotate([-Pavilion_Angle,0,0])translate([-6,0,-12])cube(12);
//Lower Girdle Facets
for(j=[-1,1])for(i=[0:7])
rotate([0,0,i*45+j*6])
translate([0,-5,Pavilion_Depth/10+.0235])
rotate([-Pavilion_Angle-1,0,0])translate([-6,0,-12])cube(12);
}

```


[User]
Okay, I'd like to create a customizable pen holder that looks like a keyboard, and I'd also like a cap so I can turn it into a box. The design should be parametric so I can change several aspects.

Here's what I have in mind:

*   **Keyboard Base (Vase):** The main body should resemble a keyboard layout, but circular in shape and open at the top, like a vase. I should be able to specify how many rows (lines) of "keys" I want. Each key should have a letter on it, and I want to customize the text on each line of the keyboard. I want to be able to choose if the keys are aligned in a typical keyboard layout or arranged in a circle. I'd like the overall scale to be adjustable, and the text size to be parametric as well.

*   **Cap:** The cap should fit snugly on top of the keyboard base. It should also have a single line of customizable text.

Specifically, I need to be able to control these parameters:

*   `part`:  This will select which part to show in the preview. Options: "vase", "cap" and "both" to show the two parts.

*   `lines`: An integer between 1 and 4 inclusive, controlling the number of key lines (rows).

*   `line1`, `line2`, `line3`, `line4`: String variables defining the text for each line of keys on the base. Only the lines up to `lines` should be displayed.

*   `captext`: String variable defining the text on the cap.

*   `squared`: A "yes/no" option to choose between standard (staggered) or squared key alignment.

*   `line_height`: (optional) the height of each keyboard row; should default to 18, but I may want to change this.

*   `$fn`: (optional) controls the circle smoothness, can be set to 30 by default.

*   text size: I should be able to change the size of the text on the keys

*   overall scale: I should be able to scale the whole object up or down uniformly.

I would like the text to use the "Arial Rounded MT Bold" font. And if possible I'd like the letters to be extruded with a small height.

The base and cap should be separate modules for easier customization and reuse, and please make sure the cap fits the base nicely. Can you generate the OpenSCAD code for this?

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

    KeyBoard penholder

    Fernando Jerez 2017
    License: CC-NC Creative Commons, Non Commercial

*/
// Wich part want to see in preview?
part="vase"; //  [vase: Vase, cap: Cap]
// Number of key lines
lines = 4; // [1:4]

// 1st line (Top)
line1 = "1st Line";
// 2nd line
line2 = "2nd Line";
// 3rd line
line3 = "3rd Line";
// 4th line
line4 = "4th Line";

// Cap text
captext = "Cap text";

// Squared layout
squared = "no"; // [no,yes]

/* [Hidden] */
$fn=30;
line_height=18;

// Convert to string to ensure Thingiverse customizer dont treat as a number
t1 =str(line1);
t2 =str(line2);
t3 =str(line3);
t4 =str(line4);
capt = str(captext);

scale([1.05,1.05,1.05]){ // adjust to a real scale keyboard
    // Different files for Thingiverse Customizer
    if(part=="both"){

        translate([-50,0,0]) keyCylinder(lines,[t1,t2,t3,t4],cap = false);
        translate([50,0,line_height]) rotate([180,0,0])
          keyCylinder(1,[capt],cap = true);

    }else if(part=="vase"){

        keyCylinder(lines,[t1,t2,t3,t4],cap = false);

    }else if(part=="cap"){

        translate([0,0,line_height]) rotate([180,0,0]) keyCylinder(1,[capt],cap = true);

    }
}

module keyCylinder(lines,linetext,cap = false){
    rad = 29;
    total_height = line_height*(lines-1);

    union(){
        if(cap==true){
            // Cap
            difference(){
                union(){
                    cylinder(r=rad+1,h=line_height*lines,$fn=100);
                    translate([0,0,-4]) cylinder(r=rad-1.3,h=4+line_height*lines,$fn=100);
                }
                translate([0,0,-4.01]) cylinder(r=rad-3,h=line_height*lines,$fn=100);
            }
        }else{
            // Vase
            difference(){
                cylinder(r=rad+1,h=line_height*lines,$fn=100);
                translate([0,0,2]) cylinder(r=rad-1,h=line_height*lines,$fn=100);
            }
        }

        // keys
        translate([0,0,9]){
            for(i=[0:lines-1]){ //rows
                translate([0,0,total_height-i*line_height]){
                    for(j=[0:9]){ // circles...10 keys per loop

                        rot=(squared=="yes")?0:(i==0)?-35:(i==1)?-17:(i==2)?-10:8; // Adjust rotation for each line

                        // Select letter
                        letter= linetext[i][j];
                        // draw key
                        rotate([0,0,36*j+rot]) translate([rad,0,0]) rotate([90,0,90])
                        key(letter);
                    }
                }
            }

        }
    }
}
module key(letter){
    // some sort of key ...
    angle = 6;
    size = 17;
    difference(){
        // key body
        hull(){
            translate([0,0,0])
            roundRect([size,size,0.01],2);
            translate([0,0,5])
            rotate([angle,0,0])
            roundRect([size-5,size-5,0.01],2);
        }
        // curve on top
        translate([0,10,25])
        rotate([90+angle,0,0])
        cylinder(r=20,h=20,$fn=100);
    }
    // text
    color("white")
    translate([-4.5,-0.5,3])rotate([angle,4,0]){
        linear_extrude(height=1.8) text(letter, font = "Arial Rounded MT Bold:style=Bold", size = 5);
    }
}

// simple module for rounded rectangles
module roundRect(size, radius) {
	x = size[0];
	y = size[1];
	z = size[2];

	translate([-x/2,-y/2,0])
	linear_extrude(height=z)
	hull() {
		translate([radius, radius, 0])circle(r=radius);
		translate([x - radius, radius, 0])circle(r=radius);
		translate([x - radius, y - radius, 0])circle(r=radius);
		translate([radius, y - radius, 0])circle(r=radius);
	}
}
```


[User]
I need a parametric bike pump holder designed in OpenSCAD. I'd like to be able to adjust several key dimensions: the height of the holder, the diameter of the bike frame tube it will attach to, the diameter of the pump, and the width of the optional velcro strap.

I also need to be able to adjust the slot width for the velcro strap (and potentially disable it entirely). There should be an opening for pump insertion, defined as a percentage of the pump's diameter. The length of the central screws should be adjustable as well, along with a minimum distance between the pump and the frame.

For more advanced customization, I need to be able to control the wall thickness, the amount of shrinkage for the frame clamping ring, a tolerance value for small holes, the frame clamping slot width, the height of the nut, the nut wrench size, and the screw diameter.

The design should include a clamping mechanism using screws and nuts, a slot for an optional velcro strap, and an opening to slide the pump into place. It also needs to use hull() to join cylinders. I'm aiming for a robust design that will hold the pump securely. It might be helpful to render the top and bottom half separately (split along the horizontal) for better printability. It also needs to support M3 screws and nuts.

Could you please generate an OpenSCAD file, or files, for this? Please let me know if you need clarification on any of these parameters. I'm happy to provide more detail where necessary. Also, it would be helpful if the code used descriptive variable names, if possible. Also, if there is a more standard approach to defining things such as screw holes, feel free to utilize that (I am not expecting you to generate your own, from scratch). I'm not sure if it is necessary for this, but feel free to use BOSL2 if it makes the generation easier for you.

[Assistant]
pump-holder.scad:
```
// Holder height, in mm
height=35;
// Frame tube diameter, in mm
frame_diameter=32;
// Pump diameter, in mm
pump_diameter=30;

// Velcro strap width, in mm
strap_width=20;
// Velcro strap slot width, in mm. Set to 0 to disable strap slot
strap_slot=3;

// Pump insertion opening as percentage of the pump diameter, in %
opening = 86;

// Central screws length, in mm
screw_length=30;

// Minimum pump to frame distance, in mm
minimum_frame_distance=5;

/* [Advanced] */

// Wall thickness, in mm
wall=3;
// Frame clamping ring shrinkin, in mm
frame_pressure=0.5;
// Small holes tolerance, in mm
tolerance=0.2;
// Frame clamping slot width, in mm
clamp_slot=4;
// Nut height, in mm
nut_height=2.4;
// Nut wrench size, in mm
nut_size=5.5;
// Screw diameter in mm
screw_diameter=3;

/* [Hidden] */

$fn=64;

opening_angle=2*asin(opening/100);
nut_dia=nut_size*2/sqrt(3)+2*tolerance;

module reflect(v)
{
    children();
    mirror(v)
        children();
}

module part()
{
    // Add compensation for holes
    frame_diameter=frame_diameter+2*tolerance;
    // Add some pressure
    pump_diameter=pump_diameter-frame_pressure+2*tolerance;
    screw_diameter=screw_diameter+2*tolerance;
    strap_width=((strap_slot&&strap_width)?strap_width+1:0);
    actual_frame_distance=max(((strap_slot&&strap_width)?wall+strap_slot:0)+wall,minimum_frame_distance,screw_diameter+2);
    axis_distance=frame_diameter/2+actual_frame_distance+pump_diameter/2;

    difference() {
        hull() {
            cylinder(d=frame_diameter+2*wall,h=height,center=true);
            translate([axis_distance,0,0])
                cylinder(d=pump_diameter+2*wall,h=height,center=true);

            translate([-(frame_diameter/2+nut_dia/2+wall/2),0,0])
                rotate([90,0,0])
                    cylinder(d=nut_dia+2*wall,h=4*wall+clamp_slot,center=true);
        }

        cylinder(d=frame_diameter,h=height+2,center=true);
        translate([axis_distance,0,0])
            cylinder(d=pump_diameter,h=height+2,center=true);
        mirror([1,0,0])
            translate([0,-clamp_slot/2,-height/2-1])
                cube([frame_diameter/2+wall+nut_dia+wall+1,clamp_slot,height+2]);

        rr=pump_diameter/2+wall;
        dd=rr*tan(opening_angle/2);
        translate([axis_distance,0,0])
            linear_extrude(height=height+2,center=true)
                polygon([[0,0],[rr,-dd],[rr,dd]]);

        translate([axis_distance,0,0]) {
            difference() {
                cylinder(d=pump_diameter+2*wall+2*strap_slot,h=strap_width,center=true);
                cylinder(d=pump_diameter+2*wall,h=strap_width+2,center=true);
            }
        }

        translate([-(frame_diameter/2+nut_dia/2+wall/2),0,0]) {
            rotate([90,0,0]) {
                cylinder(d=screw_diameter,h=max(frame_diameter,pump_diameter)+2*wall+2,center=true);
                translate([0,0,clamp_slot/2+2*wall])
                    cylinder(d=nut_dia,h=max(frame_diameter,pump_diameter)/2+wall+1,$fn=6);
                mirror([0,0,1])
                    translate([0,0,clamp_slot/2+2*wall])
                        cylinder(d=nut_dia,h=max(frame_diameter,pump_diameter)/2+wall+1);
            }
        }

        reflect([0,0,1]) {
            d2=max(strap_width/2+screw_diameter/2+1,height/2-nut_dia/2-1);
            translate([frame_diameter/2+actual_frame_distance/2,0,d2]) {
                rotate([90,0,0]) {
                    cylinder(d=screw_diameter,h=max(frame_diameter,pump_diameter)+2*wall+2,center=true);
                    //dist=min(frame_diameter,pump_diameter)/2;
                    dist=(screw_length-nut_height-1)/2;
                    translate([0,0,dist])
                        cylinder(d=nut_dia,h=nut_height+10,$fn=6);
                    mirror([0,0,1])
                        translate([0,0,dist])
                            cylinder(d=nut_dia,h=nut_height+10);
                }
            }
        }
    }
}

module print() {
    translate([0,-2.5,0]) {
        intersection() {
            part();
            rotate([90,0,0])
                cylinder(r=100,h=50);
        }
    }
    translate([0,2.5,0]) {
        intersection() {
            part();
            rotate([-90,0,0])
                cylinder(r=100,h=50);
        }
    }
}

print();
```


[User]
Hey! I'm looking for some help designing a set of soft jaws for my lathe. I've seen a few designs online, and I have a specific one in mind. I'd like to be able to adjust the dimensions to fit different chucks, so a parametric design is a must.

Here's the basic idea: It's basically a rectangular block with a curved cutout on the top that will match the curvature of my chuck. There's also a 'step' or two on the side of the jaw, intended to provide a clamping surface at a different height. The jaws should have holes that I can use to secure them to the chuck. Finally, there should be a slightly lower recess on the bottom face so that the jaws sit more snug and don't get any pressure on the edges.

I would like to be able to adjust the following parameters:
- `t`: The thickness of the walls of the soft jaw.
- `w1`: The overall width of the rectangular base.
- `w2`: The width of the thinner upper portion of the soft jaw.
- `h1`: The height of the lower base portion.
- `h2`: The total height of the soft jaw.
- `d1`: The distance to the bottom of the step,
- `d2`: The depth of the curved recess

The design also uses a few handy helper functions and modules like `T()`, `Tx()`, `Ty()`, `Tz()` for translations, `D()` for difference, `Cu()` for a cube, and `hull()` to join objects together. It looks like these functions are coming from a separate file, so it would be great if we could have these defined in a different file that the main file references. This will help make the main file more readable. I'd like this helper function file to include these functions: `T`, `Tx`, `Ty`, `Tz`, `R`, `Rx`, `Ry`, `Rz`, `S`, `Sx`, `Sy`, `Sz`, `D`, `U`, `Sq`, `Ci`, `CiH`, `CiS`, `Cy`, `Cu`, `CyH`, `CyS`, `Ri`, `RiS`, `RiH`, `Pie`, `Sp`, `SpH`, `SpS`, `circle_half`, `circle_segment`, `cylinder_half`, `cylinder_segment`, `ring`, `ring_half`, `ring_segment`, `sphere_half` and `place_in_rect`, as well as a function called `help()` that prints out a list of all available functions.

I’m envisioning something similar to the model shown in the video I linked in the description, but I'd like a bit more control over the parameters. Can you help me generate the OpenSCAD files?

[Assistant]
softjaws.scad:
```
//use <./sc.scad>
t=2;
w1=40;
w2=15;
h1=15;
h2=16;
d1=20;
d2=80;
D(){hull(){
    Cu(w1+2*t,d2,h1+2*t);Tz(h2-h1/2)Cu(w2+t,d2,h1+2*t);}
    Ty(t)hull(){Cu(w1,d2,h1);Tz(h2-h1/2)Cu(w2,d2,h1);}
    Ty(d1)Cu(w1+3*t,d2-h1,h2+h1/2);
    T(0,t,-h1/2-t)hull(){Cu(w1-3*t,d2,0.001);Tz(t)Cu(w1,d2,0.001);}
    }

    // 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);
	}
}

```
sc.scad:
```
// 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]
Okay, I need a parametric OpenSCAD design for corner protectors for tables. I've got some specific requirements for how they should look and fit.

Basically, the protector will cup the corner of the table. I need to be able to specify the table's thickness (`h`), the width or length of the protector (`w`), the thickness of the protector material itself (`ep`), and a radius (`r`) for the corners. I'd also like a "thin" parameter that lets me switch between two slightly different styles.

Here's how the parameters should affect the design:

*   `h`: This is the *internal* height of the protector, matching the table thickness.
*   `w`: This is how far the protector extends along the edges of the table corner (in both X and Y).
*   `ep`: This controls two things: the thickness of the material around the table edge, and also the radius of the internal spherical cut-out at the corner. These should both be the same.
*   `r`: This determines the radius of the spherical part at the visible corner of the protector, the rounded edge you can see.

The "thin" parameter should act like a switch. When `thin=0` the edges of the protector should be rounded with the same radius `r`, resulting in a more blocky look. But when `thin=1`, the edges should have a smaller radius, and I want the entire part to be rotated so that it prints flat. The exact angle of rotation doesn't matter, just that the largest face lies flat on the print bed.

I'm not sure how to calculate that rotation angle myself, so if you could handle that I would appreciate it!

I'm not using any external libraries at the moment, so please keep to core OpenSCAD functions. Can you generate this for me?

[Assistant]
Table_Protector_v2.scad:
```
$fn=64;

/* [Basic settings] */
// Table thickness (glass table ~8mm)
h=8;   // [1:0.1:40]
// length of the protection
w=20;     // [15:1:50]

// Both thickness of piece and ray of corners
ep=1;   // [1:0.1:5]
// Ray of the protection
r=5;    // [1:1:10]

thin=1; // [0: Thin, 1: Large]

/* [Hidden] */
d = 0.707*(r-ep);

// Anyone knows how to compute this angle
// so the part is on the xy plane ???
alpha=0*thin*atan((r-d)/(w-d))/2;
r1=1;   // when thin=1, ray of ends, must be >= ep

//translate([0,0,ep])
rotate([90,alpha,0])
difference()
{
    part(h);
    hole();
}

module part()
{
    hull()
    {
        translate([d,d]) double_sph(r);
        if (thin)
        {
            translate([w,0,0]) double_sph(r1);
            translate([0,w,0]) double_sph(r1);
        }
        else
        {
            translate([w,d,0]) double_sph(r);
            translate([d,w,0]) double_sph(r);
        }
    }
}

module double_sph(r)
{
    dd=0.707*(r-ep);
    translate([0,0,h+ep-dd]) sphere(r=r);
    translate([0,0,ep+dd]) sphere(r=r);
}

module hole()
{
    translate([0,0,ep])
    linear_extrude(height=h)
        polygon(
            [[0,0],[w*10,0],[0,w*10]]
        );
}
```


[User]
Hey there, I'm looking to create a customizable slope test for my 3D printer, something like what I've already been using but with a bit more flexibility.

Basically, I want a design that produces a series of angled test pieces, each with a different slope angle. The core of each test piece should be a rectangular cube, and then I need angled faces along one of the longer edges of the cube to create an overhang.

Each of these tests should be right next to each other with a small gap and also have a small flat area between each test. Also, the angled faces need to go in opposite directions and meet at the top edge. I've been using one that uses a polygon and linear extrude and that seems like a pretty good way to do it.

It needs to have some text on one of the faces to mark each test with the degree of the angle.

I'd like to make it fully parametric so I can control:

*   The starting angle for the first test
*   The angle increment between each test
*   The total number of test pieces
*   The width of each individual test piece
*   The overall height of each piece (all tests will be the same height)
*   The depth of the text marking the angle
*   The gap between each test

I'd like to be able to specify each of these as variables at the top of the SCAD file.

Could you generate a single OpenSCAD file for me that handles all of this? I'd like to avoid using any external libraries like MCAD, BOSL, etc. if possible, just keep it pure vanilla OpenSCAD. Thanks!

[Assistant]
Slope_Test.scad:
```
/**
 * 3d Printer Angle Tests
 * Created by Kevin Gravier <kevin@mrkmg.com>
 *
 * Use this to test your 3d printers limits for overhangs
 *
 */

startingAngle = 30; // The first Angle
anglePerTest = 5; // The amount in degree's to increment the angle per test
numberOfTests = 10; // The number of tests to include
widthPerTest = 7; // The width in mm of each test
totalHeight = 3; // The overall height in mm
depthOfText = 1; // The depth of the text with each angle
testGap = 2; // Gap between the tests

union() {

    for (i = [startingAngle:anglePerTest:(numberOfTests - 1) * anglePerTest + startingAngle]) {
        index = (i-startingAngle) / anglePerTest;
        translate([
        (index * widthPerTest) + (index * testGap),
        0,
        0])
        slatedCube(
            angle = i,
            width = widthPerTest,
            height = totalHeight,
            textDepth = depthOfText);

        if (index != numberOfTests - 1)
        translate([(index * widthPerTest) + (index * testGap) + widthPerTest - .001, 0 ,0])
        cube([testGap + .002, widthPerTest, totalHeight]);
    }
}

module slatedCube(width=10, height=20, angle=0, textDepth=2) {
    l = round(tan(angle) * height * 100) / 100;
    f = round((width / 2) * 100) / 100;

    difference () {
        union() {
            cube([width, width, height]);

            translate([width, l+width-.001, height])
            rotate([180, 90, 0])
            linear_extrude(width)
            polygon([
                [0, 0],
                [height, l],
                [0, l]
            ]);

            translate([width, -l+.001, 0])
            rotate([0, -90, 0])
            linear_extrude(width)
            polygon([
                [0, 0],
                [height, l],
                [0, l]
            ]);
        };

        translate([width/2, width/2, height-textDepth])
        linear_extrude(textDepth)
        text(str(angle), f, halign="center", valign="center");
    }

};
```


[User]
I'm looking to design a quick-release clamp for t-slot aluminum extrusions, something similar to the design described in the provided example. I need it to be fully parametric and customizable for different extrusion sizes.

Specifically, I'd like the design to include these features:

*   **Extrusion Type:**  The clamp should be adaptable to various common aluminum extrusion profiles. I need to easily select between profiles like Misumi 15mm (1515), Misumi 20mm (2020), 80/20 1" (1010), 80/20 20mm (20-2020), OpenBeam, and MicroRax.  It would be best if these were selectable via a dropdown in the customizer and if it defaulted to "80/20 20-2020".
*   **Clamp Length:** The length of the clamp section that grips the extrusion should be adjustable, with a default of 30mm and a slider range from 10 to 100mm.
*   **Jaw Length:**  I also need control over the length of the clamp's jaw, defaulting to 100mm and ranging from 10mm to 500mm.
*   **Jaw Guiding Grooves:** I'd like the option to add guiding grooves to the jaw, where I can control the depth of these grooves.  The default should be 2.25mm, and the range should go from 0 to 5mm in increments of 0.1mm, with 0 disabling the feature.
*  **Lever Nub:** I would like to have a simple boolean option to include a nub on the cam-lock lever, which helps limit its rotation. It should default to on (1).
*  **Pad Ratio**: The end of the jaw should include a ribbed pad. The length of the pad should be calculable as a ratio of the jaw length, with a slider ranging from 0.0 to 1.0 in increments of 0.1. The default should be 0.5.

The overall design should be a two-part assembly, consisting of a sliding jaw piece and a cam-lock lever.  The cam-lock should apply pressure when closed and release smoothly so the jaw slides easily when unlocked. It needs to be printable without supports.

Please make sure to include a small logo on the design, and please use comments to explain the different sections of the code. I think that should cover all of the functional aspects.

Finally, please generate the necessary OpenSCAD files to achieve this, along with any necessary documentation. If there are any helper libraries that would assist in this design, I would like to know what those are.

[Assistant]
ex_clamp.scad:
```
// Quick T-Slot Clamp
// Design by Marius Gheorghescu (@mgx3d), July 2017

// Chose the extrusion type
extrusion_type = "80/20 20-2020"; // [1515:Misumi 15mm (1515),2020:Misumi 20mm (2020),80/20 1010:80/20 1" (1010),80/20 20-2020:80/20 20mm (20-2020), OpenBeam:OpenBeam 15mm,MicroRax: MicroRax 10mm]

// length of the clamp on the extrusion (longer => better grip)
clamp_len = 30; // [10:100]

// length of the jaw in milimeters
jaw_len = 100; // [10:500]

// jaw guiding grooves depth (set to 0 for no grooves)
groove_depth = 2.25; // [0:0.1:5]

// Add a nub to the lever to limit rotation?
lever_nub = 1; // [0,1]

// Pad grooves as a ratio of jaw (total clamp length is jaw + jaw*pad)
pad_ratio = 0.5; // [0.0:0.1:1.0]

/* [Hidden] */

wall_thickness = groove_depth+2;

extrusion_size =
    (extrusion_type == "1515")?15:
    (extrusion_type == "2020")?20:
    (extrusion_type == "80/20 1010")?25.4:
    (extrusion_type == "80/20 20-2020")?20:
    (extrusion_type == "OpenBeam")?15:
    (extrusion_type == "MicroRax")?10:
    10;

extrusion_groove_min =
    (extrusion_type == "1515")?3.55:
    (extrusion_type == "2020")?6.15:
    (extrusion_type == "80/20 1010")?6.5:
    (extrusion_type == "80/20 20-2020")?5.15:
    (extrusion_type == "OpenBeam")?3.25:
    (extrusion_type == "MicroRax")?4.90:
    3.3;

extrusion_groove_max =
    (extrusion_type == "1515")?5.5:
    (extrusion_type == "2020")?11.75:
    (extrusion_type == "80/20 1010")?14.5:
    (extrusion_type == "80/20 20-2020")?11.75:
    (extrusion_type == "OpenBeam")?5.75:
    (extrusion_type == "MicroRax")?6.0:
    5.5;

extrusion_groove_lip =
    (extrusion_type == "1515")?1.15:
    (extrusion_type == "2020")?2.3:
    (extrusion_type == "80/20 1010")?2.4:
    (extrusion_type == "80/20 20-2020")?1.55:
    (extrusion_type == "OpenBeam")?1.45:
    (extrusion_type == "MicroRax")?1.0:
    1.0;

extrusion_groove_depth =
    (extrusion_type == "1515")?4.2:
    (extrusion_type == "2020")?6.1:
    (extrusion_type == "80/20 1010")?7.2:
    (extrusion_type == "80/20 20-2020")?6.0:
    (extrusion_type == "OpenBeam")?4.2:
    (extrusion_type == "MicroRax")?3.1:
    4.0;

epsilon = 0.01;

cam_dia = min(extrusion_size*0.8, clamp_len/2);
cam_z_offset = cam_dia/2 ;
cam_lock_offset = 1;

// slide-in clearance between parts
clearance = 0.25;

$fn=100;

pad_len = epsilon + jaw_len*pad_ratio;

module round_rect_ex(x1, y1, x2, y2, z, r1, r2)
{
    brim = z/10;

    hull() {
        translate([-x1/2 + r1, y1/2 - r1, z/2-brim/2])
            cylinder(r=r1, h=brim,center=true);
        translate([x1/2 - r1, y1/2 - r1, z/2-brim/2])
            cylinder(r=r1, h=brim,center=true);
        translate([-x1/2 + r1, -y1/2 + r1, z/2-brim/2])
            cylinder(r=r1, h=brim,center=true);
        translate([x1/2 - r1, -y1/2 + r1, z/2-brim/2])
            cylinder(r=r1, h=brim,center=true);

        translate([-x2/2 + r2, y2/2 - r2, -z/2+brim/2])
            cylinder(r=r2, h=brim,center=true);
        translate([x2/2 - r2, y2/2 - r2, -z/2+brim/2])
            cylinder(r=r2, h=brim,center=true);
        translate([-x2/2 + r2, -y2/2 + r2, -z/2+brim/2])
            cylinder(r=r2, h=brim,center=true);
        translate([x2/2 - r2, -y2/2 + r2, -z/2+brim/2])
            cylinder(r=r2, h=brim,center=true);

    }
}

// groove slider with 0-reference on the face of the extrusion
module groove_clamp(len, depth)
{
    radius = 0.3;

    difference() {
        union() {
            hull() {

                translate([-extrusion_groove_max/2 + radius, -radius - extrusion_groove_lip, 0])
                    cylinder(r=radius, h=len, center=true);

                translate([extrusion_groove_max/2 - radius, -radius - extrusion_groove_lip, 0])
                    cylinder(r=radius, h=len, center=true);

                translate([0, - min(extrusion_size/2, extrusion_groove_max*cos(45)) + radius - extrusion_groove_lip, 0])
                    cylinder(r=radius, h=len, center=true);
            }

            // extension
            hull() {
                translate([0, -extrusion_groove_lip/2 - epsilon, 0])
                    cube([extrusion_groove_min, extrusion_groove_lip, len], center=true);

                translate([0, depth, 0])
                    cube([extrusion_groove_min, extrusion_groove_lip, cam_dia], center=true);

                translate([0, depth, 0])
                    cube([extrusion_groove_min, extrusion_groove_lip, len], center=true);

            }
        }

        // clear bottom of the groove
        translate([0, -extrusion_groove_depth - extrusion_groove_max/2, 0])
            cube([extrusion_groove_max, extrusion_groove_max, len + epsilon], center=true);

    }
}

module logo()
{
    rotate([-90,0,90]) {
    intersection() {
        union() {
            difference() {
                round_rect_ex(3, 10, 3, 10, 2, 1, 1);
                round_rect_ex(2, 9, 2, 9, 3, 1, 1);
            }

            translate([2.5, 0, 0])
                difference() {
                    round_rect_ex(3, 10, 3, 10, 2, 1, 1);
                    round_rect_ex(2, 9, 2, 9, 3, 1, 1);
                }
        }

        translate([0, -3.5, 0])
            cube([20,4,10], center=true);
    }

    translate([1.25, -2.5, 0])
        difference() {
            round_rect_ex(8, 7, 8, 7, 2, 1, 1);
            round_rect_ex(7, 6, 7, 6, 3, 1, 1);

            translate([3,0,0])
                cube([4,2.5,3], center=true);
        }

    translate([2.0, -1.0, 0])
        cube([8, 0.5, 2], center=true);

    translate([0,-2,0])
        cylinder(r=0.25, h=2, center=true, $fn=12);

    translate([2.5,-2,0])
        cylinder(r=0.25, h=2, center=true, $fn=12);
    }

}

module arm() {

    cam_shaft_clearance = 0.5;

    translate([0,0,-clamp_len/2])
    difference() {

        hull() {
            // extrusion shell
            translate([extrusion_size/4,0,0])
               cube([extrusion_size/2, extrusion_size, clamp_len], center=true);

            // pad
            translate([jaw_len - pad_len/2, 0, clamp_len/2 - wall_thickness/2])
               cube([pad_len, extrusion_size, wall_thickness], center=true);

        }

        // save material / add strength
        translate([jaw_len/2 - epsilon + extrusion_size, extrusion_size/5, -wall_thickness])
            cube([jaw_len , extrusion_size/5, clamp_len], center=true);

        translate([jaw_len/2 - epsilon + extrusion_size, -extrusion_size/5, -wall_thickness])
            cube([jaw_len, extrusion_size/5, clamp_len], center=true);

        // longitudinal groove
        translate([jaw_len - pad_len/2, 0 ,clamp_len/2])
        rotate([0,90,0])
        rotate([0,0,45])
            cube([groove_depth, groove_depth, pad_len], center=true);

        // cross-grooves
        translate([jaw_len - pad_len/2, 0, clamp_len/2 - wall_thickness/2])
        for(i=[0:max(extrusion_size/4, groove_depth*2):pad_len]) {
            translate([i-pad_len/2,0,wall_thickness/2])
            rotate([90,0,0])
            rotate([0,0,45])
            cube([groove_depth, groove_depth, extrusion_size + jaw_len], center=true);
        }
    }
}

module cam_lever()
{
    lever_len = clamp_len+extrusion_size/4;

    difference() {
        union() {

            // cam shaft
            translate([0, 0, extrusion_size/2])
                cylinder(r=cam_dia/2, h=extrusion_size, center=true);

            // handle
            translate([0, 0, -cam_dia/4 + epsilon])
            {
                // handle
                translate([0, 0, cam_dia/8])
                hull() {
                    cylinder(r=cam_dia/2, h=cam_dia/4, center=true);

                    translate([0, lever_len, 0])
                        cylinder(r=cam_dia/4, h=cam_dia/4, center=true);
                }

                if (lever_nub) {
                    // nub to prevent flipping around
                    translate([0, lever_len, cam_dia/4 + cam_dia/8 - epsilon])
                        cylinder(r=cam_dia/4, h=cam_dia/4, center=true);
                }

                // bevel
                translate([0, 0, -cam_dia/8 +epsilon])
                hull() {
                    cylinder(r1=cam_dia/4, r2=cam_dia/2, h=cam_dia/4, center=true);
                    translate([0, lever_len, 0])
                        cylinder(r1=cam_dia/8, r2=cam_dia/4, h=cam_dia/4, center=true);
                }

            }
         }

         // offset groove
         translate([0, cam_lock_offset, extrusion_size/2 - extrusion_groove_min/2])
         difference() {

            translate([0, 0, extrusion_groove_min/2 + cam_dia/2 + clearance])
                cylinder(r=cam_dia, h=extrusion_groove_min + cam_dia + 2*clearance, center=true);

            cylinder(r=cam_dia/2 - cam_lock_offset, h=extrusion_size, center=true);
            translate([0,0,cam_dia/2 + extrusion_groove_min - epsilon])
                cylinder(r1=cam_dia/2 - cam_lock_offset, r2=cam_dia*1.5, h=cam_dia, center=true);

         }
    }
}

module jaw()
{
    depth = extrusion_size/2 - extrusion_groove_lip/2;
    height = clamp_len;

    difference() {
        union() {
            groove_clamp(height, depth);

            // cam rider
            translate([0, cam_z_offset + cam_lock_offset*0, 0])
            rotate([90,0,90])
                cylinder(r=cam_dia/2 + cam_lock_offset, h=extrusion_groove_min, center=true);

            difference() {
                translate([0,clearance, -clamp_len/2])
                rotate([0,180,-90]) arm();

                // cam shaft clearance
                translate([0, cam_z_offset + cam_lock_offset*0, 0])
                rotate([90,0,90])
                    hull() {
                        cylinder(r=cam_dia/2 + clearance, h=60, center=true);

                        translate([-cam_lock_offset,0,0])
                            cylinder(r=cam_dia/2 + clearance, h=60, center=true);

                        translate([-cam_lock_offset - cam_dia, cam_dia/2,0])
                            cylinder(r=cam_dia/2 + clearance, h=60, center=true);
                    }
            }
        }

        translate([0, cam_z_offset - cam_lock_offset*1.5, 0])
        rotate([90,0,90])
            hull() {
                cylinder(r=cam_dia/2 + clearance, h=60, center=true);
            }

        //translate([extrusion_size/2 + 0.25, cam_z_offset + cam_dia, -2 - ((jaw_len < 40)?cam_dia/2:0)])
        translate([-1, extrusion_groove_lip + 0.5, clamp_len/2 + 0.5])
        rotate([0,-90,-90])
        scale((extrusion_size*1.5 - 8)/extrusion_size)
            logo();

    }

}

module clamp()
{
    depth = cam_dia;
    height = clamp_len;
    cam_shaft_clearance = 0.25;

    //translate([0,0,-clamp_len/2])

    difference() {
        union() {
            hull() {
                // extrusion shell
                translate([extrusion_size/4,0,0])
                   cube([extrusion_size/2, extrusion_size, clamp_len], center=true);

                // pad
                translate([extrusion_size/2 + jaw_len, 0, -clamp_len/2 + wall_thickness/2])
                   cube([pad_len, 0*2*wall_thickness + extrusion_size, wall_thickness], center=true);

                translate([cam_z_offset, 0,  0])
                rotate([0,90,90])
                    cylinder(r=cam_dia/2 + clearance + wall_thickness, h=extrusion_size, center=true);

            }
        }

        // locking plate clearance
        translate([jaw_len/2- epsilon,0, wall_thickness])
            cube([jaw_len, extrusion_groove_min, clamp_len+epsilon], center=true);

        // clear material
        translate([jaw_len/2 + pad_len/2 - epsilon + extrusion_size/2, 0, wall_thickness])
            cube([jaw_len + pad_len, extrusion_size/2, clamp_len], center=true);

        // longitudinal groove
        translate([(extrusion_size + jaw_len)/2 + extrusion_size,0, -clamp_len/2])
        rotate([0,90,0])
        rotate([0,0,45])
            cube([groove_depth, groove_depth, extrusion_size + jaw_len + pad_len], center=true);

        // cross-grooves
        translate([0*wall_thickness + extrusion_size/2 + jaw_len, 0, -clamp_len/2 - wall_thickness/2])
        for(i=[extrusion_size/4:extrusion_size/4:pad_len]) {
            translate([pad_len/2 - i,0,wall_thickness/2])
            rotate([90,0,0])
            rotate([0,0,45])
            cube([groove_depth, groove_depth, extrusion_size + jaw_len], center=true);
        }

        // cam shaft clearance
        translate([cam_z_offset, 0,  0])
        rotate([0,90,90])
            cylinder(r=cam_dia/2 + clearance, h=60, center=true);
    }
}

module locking_plate()
{
    difference() {

        union() {
            groove_clamp(clamp_len, cam_z_offset + cam_dia/2 + wall_thickness);

            harden_len = cam_z_offset + cam_dia/2 - extrusion_size/2 + wall_thickness + extrusion_groove_lip;

            translate([0, extrusion_size/2 + harden_len/2, 0])
                cube([extrusion_size/2, harden_len, clamp_len], center=true);
        }

        // cam shaft clearance
        translate([0, cam_z_offset - extrusion_groove_lip, -wall_thickness])
        rotate([0,90,0])
            cylinder(r=cam_dia/2 + clearance, h=extrusion_size, center=true);
    }

}

// show assembled?
if (0) {

    color([0.2,0.2,0.2,1.0]) jaw();
    color("red") translate([ -extrusion_size/2, cam_z_offset, 0]) rotate([90,0,90])
        cam_lever();

    %translate([0, -extrusion_size/2, 0]) cube([extrusion_size, extrusion_size, 5*clamp_len], center=true);

} else {

    jaw();
    translate([extrusion_size, 0, -clamp_len/2 +cam_dia/2]) cam_lever();

}

```