[User]
Hey, I'm looking to design a hex wrench handle in OpenSCAD, and I'd like it to be parametric so I can easily adjust it for different wrench sizes and mounting options. I've been playing around with some existing designs, but I'd like something a bit more polished from scratch.

Here are the key features I need:

*   **Parametric Hex Hole:** The design should have a hexagonal hole to insert the wrench. The size of this hole needs to be easily adjustable using a variable (e.g., `hex_size`). I need to also have a `hole_delta` variable that adds a little extra to that size to avoid tight fits with 3D printed parts.

*   **Handle:** A cylindrical handle, with a parametric diameter (`handle_diameter`) and height (`handle_height`). I'd like the ends of the cylinder to be a little rounded - maybe a sphere at one end and some kind of chamfer at the other.

*   **Knurling:** I like the idea of knurling on the handle for grip. It doesn't have to be a super detailed, but enough to add texture.

*   **Screw Mounting Option:** I would like to have the option of securing the wrench with a screw. I need to define the screw size and head size using `screwSize` and `screwHead` variables. The screw hole should be slightly undersized so a screw can tap into the hole. It would also be good to have a clearance cutout for the screw head so that it sits flush. It'd also be good to be able to specify the size of the screw via text, like "M2", "M3", etc, and have that text printed on the side of the handle. I'd like to use Liberation Sans font in bold for this.

*   **Removable Locking Option:** I'm also interested in a snap-fit locking mechanism to secure the wrench, instead of using the screw, but I still want the user to be able to choose between the screw or the locking version. I'm thinking a cylindrical cut with an additional slot on the side that allows the wrench to "snap" in, maybe using a `lockType` variable where `0` means screw and `1` means snap-fit.

*   **Wrench Placement:**  The position of the wrench and any locking features should be adjustable vertically using a variable (e.g., `shiftWrenchLevel`).

I don't need to worry about zip ties, so you can skip those features from the original code I was looking at. Can you generate a parametric OpenSCAD file (or files if you think it's better structured that way) that does all of this? I don't think I need any additional libraries.

[Assistant]
HexWrenchHandleWithScrewandText.scad:
```
// Diameter of hole for the hex wrench
hex_size = 2.2;

// Increase slot size by this amount
hole_delta = 0.15;

// Diameter of the handle
handle_diameter = 15;

handle_height = 40;

handle(hex_size);

//Diameter parameters for screw
screwSize = 3.1;
screwHead = 6;

text="M2";

module handle(hex_size)

{
    hex_radius = (hex_size + hole_delta) / 2;
	hex_size = hex_size + hole_delta;
	handle_radius = handle_diameter / 2;
	knurl_offset = handle_radius * 1.2;
	//handle_height = 50;
	slot_width = 1.2 * handle_radius;
	zip_tie_back = 0.6 * handle_radius;
	slot_bottom = 15;

	$fn=40;									// Control quality of mesh

	hole_radius = hex_radius + .2;	// Give a little more room for small hole

	rotate([0,0,180]){difference()
	{
		union()
		{
			cylinder(h = 5, r1 = handle_radius - 3, r2 = handle_radius);
			translate(v=[0, 0, 5])
				cylinder(h = handle_height - 5, r = handle_radius);
			translate(v=[0, 0, handle_height])
				sphere(handle_radius);
		}

		for (angle = [-30:-60:-300])
			translate(v=[knurl_offset * cos(angle), knurl_offset * sin(angle), 0])
				cylinder(h = handle_height + handle_radius, r = handle_radius / 2.7);
translate([0,0,-5]){               // Shifted all the cut features down by 5 so shorter handles can be handled without hitting the wrench as much
		// Shaft hole
		cylinder(h = handle_height + handle_radius, r = hole_radius);

        //Hole for the screw
        translate([handle_radius/2.5,handle_diameter/2,slot_bottom+3/2+hex_size])rotate([90,0,0])cylinder(handle_diameter,d=screwSize-0.2);

        //Hole for the screwhead
        translate([handle_radius/2.5,-handle_radius/1.75,slot_bottom+3/2+hex_size])rotate([90,0,0])cylinder(handle_diameter,d=screwHead);

        //Cutout to keep the material above the screwhead from needing support Leitnin
        intersection(){
        translate([handle_radius/2.5,-handle_radius/1.75,slot_bottom+3/2+hex_size])rotate([90,0,0])cylinder(handle_diameter,d=screwHead*2);
        translate([handle_radius/2.5,-handle_radius/1.75-handle_radius/1.5,slot_bottom+3/2+hex_size])rotate([45,0,0])cube([screwHead-1,10,10], center=true);
        }

        // Text

        font1 = "Liberation Sans:style=Bold"; // here you can select other font type
        content = text;

        rotate([0,0,45])translate ([handle_diameter/2-0.8,2,handle_height-10]) {
        rotate ([0,-90,180]) {
        linear_extrude(height = 1.5) {
        text(content, font = font1, size = handle_diameter/3, direction = "ltr", spacing = 1 );
        }
        }
        }

		// Small cone at bottom
		cylinder(h = 2, r1 = hole_radius + .6, r2 = hole_radius);

		// Slot for the wrench
		translate(v=[0, -hex_size /2, slot_bottom])
			cube(size = [handle_radius, hex_size, handle_height + handle_radius]);

//		// Slot for bend in wrench
		translate(v=[0, -hex_size / 2, slot_bottom - 1.5 * hex_size])
			cube(size = [1.5 * hex_size, hex_size, 2 * hex_size]);

		// Lower slot for zip-tie
//		translate(v=[zip_tie_back, -slot_width / 2, slot_bottom - 6])
//			cube(size=[3, slot_width, 3]);

		// Upper slot for zip tie
//		translate(v=[zip_tie_back, -slot_width / 2, slot_bottom + sin(60) * hex_size - 1])
//			cube(size=[3, slot_width, 3]);

		// Zip Tie Opening
//		translate(v=[zip_tie_back, slot_width / 4, slot_bottom - 6])
//			cube(size=[3, slot_width / 4, 6 + sin(60) * hex_size + 2]);
//
//		translate(v=[zip_tie_back, -slot_width / 2, slot_bottom - 6])
//			cube(size=[3, slot_width / 4, 6 + sin(60) * hex_size + 2]);
}
}
	}
}

```
Update2_HexWrenchHandleWithScreworSnapandText.scad:
```
// Diameter of hole for the hex wrench
hex_size = 3.4;

// Increase slot size by this amount
hole_delta = 0.15;

// Diameter of the handle
handle_diameter = 15;

handle_height = 35;

handle(hex_size);

//Diameter parameters for screw
screwSize = 3;
screwHead = 6;

text="M3";

lockType=0; //0 = removable  1 = screw

shiftWrenchLevel = -5;  //Height adjustment factor for where the wrench,screw,etc are located.

module handle(hex_size)

{
    hex_radius = (hex_size + hole_delta) / 2;
	hex_size = hex_size + hole_delta;
	handle_radius = handle_diameter / 2;
	knurl_offset = handle_radius * 1.2;
	//handle_height = 50;
	slot_width = 1.2 * handle_radius;
	zip_tie_back = 0.6 * handle_radius;
	slot_bottom = 15;
    z_adjust = 0;

	$fn=40;									// Control quality of mesh

	hole_radius = hex_radius + .2;	// Give a little more room for small hole

	rotate([0,0,180]){

        difference()

	{
		union()
		{
			cylinder(h = 5, r1 = handle_radius - 3, r2 = handle_radius);
			translate(v=[0, 0, 5])
				cylinder(h = handle_height - 5, r = handle_radius);
			translate(v=[0, 0, handle_height])
				sphere(handle_radius);
		}

		for (angle = [-30:-60:-300])
			translate(v=[knurl_offset * cos(angle), knurl_offset * sin(angle), 0])
				cylinder(h = handle_height + handle_radius, r = handle_radius / 2.7);

translate([0,0,shiftWrenchLevel]){               // Shifted all the cut features down by 5 so shorter handles can be handled without hitting the wrench as much
		// Shaft hole
		cylinder(h = handle_height + handle_radius, r = hole_radius);

        //Hole for the screw
    if(lockType == 1){
        translate([handle_radius/2.5,handle_diameter/2,slot_bottom+3/2+hex_size])rotate([90,0,0])cylinder(handle_diameter,d=screwSize-0.1);

        //Hole for the screwhead
        translate([handle_radius/2.5,-handle_radius/1.75,slot_bottom+3/2+hex_size])rotate([90,0,0])cylinder(handle_diameter,d=screwHead);

        //Cutout to keep the material above the screwhead from needing support Leitnin
                intersection(){
        //translate([handle_radius/2.5,-handle_radius/1.75,slot_bottom+3/2+hex_size])rotate([90,0,0])cylinder(handle_diameter,d=screwHead*2);

                translate([handle_radius/2.5+4,-handle_radius/1.75-handle_radius,slot_bottom+3/2+hex_size])rotate([45,0,0])cube([screwHead+8,handle_diameter,handle_diameter], center=true);
                translate([handle_radius/2.5+4,-handle_radius/1.75-handle_radius,slot_bottom+3/2+hex_size])rotate([0,0,0])cube([screwHead+8,handle_diameter,handle_diameter], center=true);
        }

}

        // Text

        font1 = "Liberation Sans:style=Bold"; // here you can select other font type
        content = text;

        rotate([0,0,45])translate ([handle_diameter/2-0.8,2,handle_height-10]) {
        rotate ([0,-90,180]) {
        linear_extrude(height = 1.5) {
        text(content, font = font1, size = handle_diameter/3, direction = "ltr", spacing = 1 );
        }
        }
        }

		// Small cone at bottom
		cylinder(h = 2, r1 = hole_radius + .6, r2 = hole_radius);

		// Slot for the wrench
		translate(v=[0, -hex_size /2, slot_bottom])
			cube(size = [handle_radius, hex_size, handle_height + handle_radius]);

//		// Slot for bend in wrench
		translate(v=[0, -hex_size / 2, slot_bottom - 1.5 * hex_size])
			cube(size = [1.5 * hex_size, hex_size, 2 * hex_size]);

		// Lower slot for zip-tie
//		translate(v=[zip_tie_back, -slot_width / 2, slot_bottom - 6])
//			cube(size=[3, slot_width, 3]);

		// Upper slot for zip tie
//		translate(v=[zip_tie_back, -slot_width / 2, slot_bottom + sin(60) * hex_size - 1])
//			cube(size=[3, slot_width, 3]);

		// Zip Tie Opening
//		translate(v=[zip_tie_back, slot_width / 4, slot_bottom - 6])
//			cube(size=[3, slot_width / 4, 6 + sin(60) * hex_size + 2]);
//
//		translate(v=[zip_tie_back, -slot_width / 2, slot_bottom - 6])
//			cube(size=[3, slot_width / 4, 6 + sin(60) * hex_size + 2]);

if(lockType == 0){
        // Wrench rotation slot
        translate(v=[0,0, slot_bottom])
        difference(){

            cylinder(h = hex_size+z_adjust, r1 = handle_radius, r2 = handle_radius);

            translate(v=[-handle_radius,0,0])
            cube(handle_radius);
            translate(v=[-handle_radius,-handle_radius,0])
            cube(handle_radius);
            translate(v=[0,-handle_radius,0])
            cube(handle_radius);
        }

// Bend rotation slot
        translate(v=[0, 0, slot_bottom - 1.5 * hex_size])
            difference(){
            cylinder(h=2*hex_size,r2=norm([1.5*hex_size,hex_size]), r1=hex_size);

            translate(v=[-2*hex_size,0,0])
            cube(2*hex_size);
            translate(v=[-2*hex_size,-2*hex_size,0])
            cube(2*hex_size);
            translate(v=[0,-2*hex_size,0])
            cube(2*hex_size);
            }
        rotate([0,0,90])
            translate(v=[0, -hex_size / 2, slot_bottom - 1.5 * hex_size])
                cube(size = [1.5 * hex_size, hex_size, 2 * hex_size]);

        // Lock slot
        rotate([0,0,90])
        translate(v=[0, (-hex_size+.1) / 2, slot_bottom])
			cube(size = [handle_radius, (hex_size-.1), hex_size*2]);
        translate(v=[0, 0, slot_bottom+2*hex_size])
            rotate([-90,0,0])
                cylinder(h=handle_radius, d=hex_size);
        }
}
}
	}
}

```


[User]
I need a parametric can dispenser for my refrigerator, and I'd like to use OpenSCAD to design it. I'm thinking it should have two side pieces, some supports for the bottom, and a top shelf. I want to be able to customize it for different sized cans, and possibly even omit the top shelf if I don't need to put things on top.

Here are the parameters I think I'll need:

*   **Can Dimensions:**
    *   `can_diameter`: Diameter of the can (in mm).
    *   `can_height`: Height of the can (in mm).
    *   `can_support_height`: How far up from the bottom the can should be supported (in mm).

*   **Dispenser Dimensions:**
    *   `depth`: Depth of the dispenser (in mm).
    *   `height`: Height of the dispenser (in mm).
    *   `shelf_y`: How far from the front the top shelf should begin (in mm).

*   **Rear Notch:**
    *   `should_notch_rear`: Boolean to notch the bottom rear corner to avoid a rim on the fridge shelf.
    *   `rear_notch_height`: Height of the rear notch (in mm).
    *   `rear_notch_depth`: Depth of the rear notch (in mm).

*   **Nitpicky Details:**
    *   `wall_thickness`: Minimum wall thickness (in mm).
    *  `top_thickness`: Thickness of the top shelf (in mm).
    *   `bottom_brace_width`: Width of the bottom braces (in mm).
    *  `bottom_brace_thickness`: Thickness of the bottom braces (in mm).
    *   `slope_angle`:  Slope of the can ramps (as a percent, e.g. 0.026 for 2.6%)
    *   `assembly_slack`: Extra space in assembly slots (in mm).
    *   `brace_middle_addl_thickness`: Extra thickness for the middle of bottom braces and top (in mm).
    *   `brace_middle_extra_width`: How much the thicker middle should overlap the sides (in mm).
    *   `slack`:  Extra space to add to the can's size to ensure smooth rolling.

The design should include:

*   **Can Tracks:**  A path for the cans to roll down, with a slope (using `slope_angle`) towards the back for dispensing, and then a slope back down so a can can move forward when the next one is removed.
*   **Supports:**  Slots for bottom supports and the top shelf to slide into.
*   **Finger Cutout:** A cutout near the front of the lower can path to make it easy to remove the can.
*   **Half sides/top:** The ability to print half of the sides or top if necessary due to printer size.

I think I'd like to have a variable `part` that can be set to:

*   `fullside`:  To generate the entire side piece.
*   `frontside`:  To generate the front half of a side.
*   `rearside`:  To generate the rear half of a side.
*   `supports`: To generate bottom supports.
*   `top`: To generate the full top shelf.
*   `halftop`: To generate half of the top shelf.
*   `topcutout`: STL for slic3r to make top for full top mesh.
*    `halftopcutout`: STL for top mesh for half top.

I think that's everything. Can you generate the OpenSCAD files for this?

[Assistant]
Can_Dispenser.scad:
```
/*
FourOhFour
2018-03-08

License: http://creativecommons.org/licenses/by-sa/4.0/

A can dispenser for your fridge. Print two sides (mirror one in your slicer), one set of supports for the bottom, and a top shelf. Half sides and top provided if, like me, you don't have a large printer. If you aren't going to place items on top of the dispenser, you can save some plastic and replace the top shelf with another set of supports.

*/

/* [Can Dimensions] */
// Diameter of the can, mm
can_diameter = 67;

// Height of the can, mm
can_height = 123;

// How far from the edge should the can be supported, mm
can_support_height = 30;

/* [Dispenser Dimensions] */
// depth of dispenser, mm
depth = 341;

// height of dispenser, mm
height=160;

// how far from the front does the top shelf begin, mm
shelf_y = 100;

// which object?
part = "fullside"; // [fullside:Entire side piece, frontside:Front half of side, rearside:Rear half of side, supports, top, halftop:Half of top, topcutout:STL for slic3r to make top for full top mesh, halftopcutout:STL for top mesh for half top]

/* [Rear Notch] */
//notch out the bottom rear corner to avoid a rim on the fridge shelf?
should_notch_rear = false;
rear_notch_height = 33;
rear_notch_depth = 9;

/* [Nitpicky Details] */
// min wall thickness, mm
wall_thickness = 2.2;

// top shelf thickness, mm
top_thickness = 2;

// size of the bottom braces, mm
bottom_brace_width = 15;

// bottom brace thickness, mm
bottom_brace_thickness = 1.4;

// slope of ramps, percent
slope_angle = .026;

// extra space in assembly slots, mm
assembly_slack = .10;

// extra thickness for the middle of bottom braces and top, mm
brace_middle_addl_thickness = 1;

// how much should the thicker middle overlap the sides, mm
brace_middle_extra_width = 2;

// ammount to add to the size of the can, mm
slack = 2;

// render quality, lower better, min 0.01 def 12
$fa = 3;

track_radius = (can_diameter + slack) / 2;

module can_track(slope_dir) {
  y = depth - 3*track_radius - 2*wall_thickness;
  hull() {
    cylinder(h=can_support_height, r=track_radius);
    translate(
      [y * slope_angle * slope_dir,
      y,
      0]
    ) {
      cylinder(h=can_support_height+.1, r = track_radius);
      // adding some to height to make the preview render better
    }
  }
}

module support_inset(y, face) {
  thickness = (face==1 ? top_thickness : bottom_brace_thickness);
  translate([(face==1 ? 0 : -.1),0,-1]) cube(
    [thickness + assembly_slack+.1,
    y,
    can_support_height + wall_thickness+2]
  );
  translate([
    -face * assembly_slack - (face==1 ? brace_middle_addl_thickness : -thickness),
    0,
    can_support_height + wall_thickness - brace_middle_extra_width - assembly_slack
  ]) {
    cube([
      assembly_slack + brace_middle_addl_thickness,
      y,
      assembly_slack + brace_middle_extra_width
    ]);
  }
}

module support_piece(width, thickness) {
  support_length = can_height + slack;
  union() {
    cube([support_length + 2*wall_thickness, width, thickness]);
    translate([wall_thickness + can_support_height - brace_middle_extra_width, 0, thickness]) {
      cube([support_length - 2*can_support_height + 2*brace_middle_extra_width, width, brace_middle_addl_thickness]);
    }
  }
}

module finger_cutout() {
  translate([track_radius, -track_radius, -wall_thickness - .2]) {
    hull() {
      cylinder(h=can_support_height + 2*wall_thickness, r=track_radius);
      translate([height, 0, 0])
        cylinder(h=can_support_height + 2*wall_thickness, r=track_radius);
    }
  }
}

module can_path() {
  can_track(1); // lower track, slope up towards rear

  // cutout for can removal
  translate([0, -track_radius-wall_thickness,0]) {
    intersection() {
      cube([2*track_radius, 2*track_radius, can_support_height+.1]);
      cylinder(h=can_support_height + .1, r=2*track_radius);
    }
  }

  translate(
    [(depth - 3*track_radius - 2*wall_thickness) * slope_angle * 2 + 2*track_radius + wall_thickness,
    0,
    0]
  ) {
    /*translate([-(depth-track_radius)*slope_angle,track_radius,0])
      finger_cutout();*/
    can_track(-1); // upper track, slope down towards rear
  }

  // switchback
  translate(
    [(depth-2*track_radius-2*wall_thickness)*slope_angle+track_radius,
    depth-3*track_radius-2.5*wall_thickness,
    0]
  ) {
    difference() {
      // additional height so preview renders better
      cylinder(h=can_support_height+.1, r=2*track_radius + wall_thickness/2);
      translate([-2*track_radius,-2*track_radius-wall_thickness,-5]) {
        cube([4*track_radius,2*track_radius+wall_thickness,can_support_height+5],false);
      }
    }
  }
}

module dispenser_splitter() {
  translate([-1,-1,-1]) { // move away from origin so preview doesn't flicker
    midpoint_x = height/2 + 1; // account for the previous line
    midpoint_y = depth/2 + 1;
    linear_extrude(height = can_support_height + wall_thickness + 2) polygon(
      points = [
        [0,           0         ],
        [0,           midpoint_y],
        [midpoint_x,  midpoint_y],
        [midpoint_x,  midpoint_y - bottom_brace_width],
        [height+2,    midpoint_y - bottom_brace_width],
        [height+2,    0]
      ]
    );
  }
}

module can_dispenser() {
  difference() {
    cube([height,depth,can_support_height + wall_thickness]);

    // rear notch
    if(should_notch_rear) {
      translate([0, depth - rear_notch_depth,0]) {
        cube([rear_notch_height,rear_notch_depth,can_support_height+wall_thickness]);
      }
    }

    // slot for top shelf
    translate(
      [height - top_thickness - assembly_slack,
      track_radius + wall_thickness - .01,
      0]
    ) {
      support_inset(depth - track_radius - wall_thickness + .02, 1); //facing right
    }

    // slots for bottom braces
    translate(
      [0,
      depth - bottom_brace_width - assembly_slack - (should_notch_rear ? rear_notch_depth : 0),
      0]
    ) {
      support_inset(bottom_brace_width + assembly_slack+.1, -1);
    }
    translate(
      [0,
      depth / 2 - bottom_brace_width,
      0]
    ) {
      support_inset(2*bottom_brace_width + assembly_slack, -1);
    }

    // can path
    translate([track_radius+wall_thickness,track_radius+wall_thickness,wall_thickness]) {
      finger_cutout();
      can_path();

      // rounded lower corner
      translate([0,0,-wall_thickness])
        intersection() {
          translate([-2*track_radius,-2*track_radius,0])
            cube([track_radius*2,track_radius*2,can_support_height+wall_thickness]);
          difference() {
            cylinder(h=can_support_height+wall_thickness, r=2*track_radius);
            cylinder(h=can_support_height+wall_thickness, r=track_radius+wall_thickness);
          }
        }
    }
  }
}

if(part == "fullside" || part == "frontside" || part == "rearside") {
  // printing only half?
  if(part == "fullside") {
    can_dispenser();
  } else if(part == "frontside") {
    intersection() {
      can_dispenser();
      dispenser_splitter();
    }
  } else {
    difference() {
      can_dispenser();
      dispenser_splitter();
    }
  }
} else if(part == "supports") {
  support_piece(bottom_brace_width, bottom_brace_thickness);

  translate([0,bottom_brace_width + 5,0])
    support_piece(2*bottom_brace_width, bottom_brace_thickness);
} else if(part == "top") {
  support_piece(depth - track_radius - wall_thickness, top_thickness);
} else if(part == "halftop") {
  support_piece((depth - track_radius - wall_thickness)/2, top_thickness);
} else if(part=="topcutout") {
  translate([can_support_height + wall_thickness,0,0])
    cube([can_height + slack - 2*can_support_height, depth - track_radius - wall_thickness, top_thickness + brace_middle_addl_thickness]);
} else if(part=="halftopcutout") {
  translate([can_support_height + wall_thickness,0,0])
    cube([can_height + slack - 2*can_support_height, (depth - track_radius - wall_thickness)/2, top_thickness + brace_middle_addl_thickness]);
} else {
  translate([track_radius+wall_thickness,track_radius+wall_thickness,-(can_support_height/2)])
    can_path();
}

```


[User]
I'd like to design a holder for my Sodastream bottle that will hang on a Cornelius keg. I have an existing design that I'd like to use as a base, but I need it to be parametric so I can adjust it to fit different bottles and kegs and have it generated from scratch.

The holder consists of a central "spine" with two collars that grip the Sodastream bottle, a hook at the top to hang it on the keg, and two buckles for straps to secure it around the keg. The back of the holder is curved to match the keg's curvature.

Here's a breakdown of the parameters I need to be able to customize:

**Holder:**
*   `thickness_of_holder`: The thickness of the spine connecting the collars (range: 5-10mm).
*   `width_of_holder`: The width of the spine (range: 10-50mm).
*   `height_of_holder`: The total height of the holder (range: 175-350mm).

**Collars:**
*   `upper_collar_position`: The vertical position of the upper collar from the bottom of the holder (range: 150-300mm).
*   `height_of_collars`: The height of each collar (range: 10-50mm).
*   `thickness_of_collars`: The thickness of the collar walls (range: 3-10mm).
*  `thickness_of_bottom`: The thickness of the cross at the bottom of the base collar (range: 3-10mm)
*   `inner_width_of_collars`: The inner width of the collars to fit the bottle (range: 60-70mm).
*   `base_support_width`: Width of support struts in base collar (range: 0.5-15)

**Hook:**
*   `depth_of_hook`: The horizontal depth of the hook at the top (range: 10-40mm).
*   `height_of_hook`: The vertical height of the hook from the top of the holder (range: 5-30mm).

**Buckles:**
*   `height_of_buckle`: The height of the strap buckles (range: 20-50mm).
*   `lower_buckle_position`: The vertical position of the lower buckle from the bottom of the holder (range: 25-150mm).
*   `upper_buckle_position`: The vertical position of the upper buckle from the bottom of the holder (range: 150-250mm).

**Other Considerations:**

*   I need the back of the holder to be curved to fit the Cornelius keg's radius, which is roughly 110mm.
*   The design includes strap buckles that need to have clearance for straps that are 3mm thick. The strap buckle wall is 3mm.
*  The `base_support_width` needs to have a minimum value of 0.5
*   I'm not particularly concerned about the rendering quality; $fn=100 will be fine.

I think that's everything. I'd like this in a single parametric OpenSCAD file, if possible. Thanks!

[Assistant]
sodastream_bottle_holder.scad:
```
// Customizable Sodastream bottle holder for Cornelius kegs
// Copyright: Olle Wreede 2019
// License: CC BY-SA

//CUSTOMIZER VARIABLES

/* [Holder] */

// Thickness in mm of the holder connecting the collars
thickness_of_holder = 8; // [5:10]

// Width in mm of the holder connecting the collars
width_of_holder = 30; // [10:50]

// This is the total height in mm of the holder
height_of_holder = 325; // [175:350]

/* [Collars] */

// Position in mm of upper collar
upper_collar_position = 267; // [150:300]

// The height in mm of each collar around the Sodastream bottle
height_of_collars = 20; // [10:50]

// Thickness in mm of collar walls
thickness_of_collars = 5; // [3:10]

// Thickness in mm of the cross at the bottom of the base collar
thickness_of_bottom = 5; // [3:10]

// Width in mm of the Sodastream bottle
inner_width_of_collars = 60; // [60:70]

// Width in mm of support struts in base collar
base_support_width = 10; // [5:0.5:15]

/* [Hook] */

// Depth in mm of the hook at the top
depth_of_hook = 25; // [10:40]

// Height in mm of the hook from the top
height_of_hook = 20; // [5:30]

/* [Buckles] */

// Height in mm of the strap buckles
height_of_buckle = 30; // [20:50]

// Position in mm of lower buckle
lower_buckle_position = 50; // [25:150]

// Position in mm of upper buckle
upper_buckle_position = 242; // [150:250]

//CUSTOMIZER VARIABLES END

/* [Hidden] */

$fn=100;

BASE_WIDTH = inner_width_of_collars + 1; // Adding some tolerance
OUTER_DIAMETER = BASE_WIDTH + thickness_of_collars * 2;
HOLDER_POSITION = BASE_WIDTH / 2 + thickness_of_holder / 2;

KEG_RADIUS = 110;
// Todo select between different keg radius versions

STRAP_BUCKLE_WALL = 3;
STRAP_THICKNESS = 3;
STRAP_WIDTH = height_of_buckle - STRAP_BUCKLE_WALL * 2;
STRAP_BUCKLE_WIDTH = width_of_holder + STRAP_THICKNESS * 2 + STRAP_BUCKLE_WALL * 2;

// Hanger
module hanger() {
    translate([0, HOLDER_POSITION, height_of_holder / 2]) {
        cube(size = [width_of_holder, thickness_of_holder, height_of_holder], center = true);
    }

    // Lower strap buckle
    translate([0, HOLDER_POSITION, lower_buckle_position]) {
        strap_buckle();
    }

    // Upper strap buckle
    translate([0, HOLDER_POSITION, upper_buckle_position]) {
        strap_buckle();
    }
}

module base_collar() {
     difference() {
        cylinder(h=thickness_of_bottom + height_of_collars, d=OUTER_DIAMETER);
        cylinder(h=height_of_collars * 2, d=BASE_WIDTH);
     }

 }
module base() {
    base_collar();

    // Base supports
    translate([0, 0, thickness_of_bottom / 2]) {
        cube([base_support_width, BASE_WIDTH + thickness_of_collars, thickness_of_bottom], center=true);
        rotate([0, 0, 90])
            cube([base_support_width, BASE_WIDTH + thickness_of_collars, thickness_of_bottom], center=true);
    }
}

module upper_collar() {
    translate([0, 0, upper_collar_position]) {
        difference() {
            cylinder(h=height_of_collars, d=OUTER_DIAMETER);
            cylinder(h=height_of_collars, d=BASE_WIDTH);
        }
    }
}

module strap_buckle() {
    difference() {
        cube([STRAP_BUCKLE_WIDTH, thickness_of_holder, height_of_buckle], center=true);

        // Strap holes
        translate([width_of_holder / 2 + STRAP_THICKNESS / 2, 0, 0]) {
            cube([STRAP_THICKNESS, thickness_of_holder, STRAP_WIDTH], center = true);
        }
        translate([0 - (width_of_holder / 2 + STRAP_THICKNESS / 2), 0, 0 ]) {
            cube([STRAP_THICKNESS, thickness_of_holder, STRAP_WIDTH], center = true);
        }

        // Make room for straps behind buckle
        strap_hole_pos = thickness_of_holder / 2 - STRAP_THICKNESS / 2 + 1;
        translate([width_of_holder / 2 + STRAP_THICKNESS, strap_hole_pos, 0]) {
            cube([STRAP_BUCKLE_WALL * 2, 2, STRAP_WIDTH], center = true);
        }
        translate([0 - (width_of_holder / 2 + STRAP_THICKNESS), strap_hole_pos, 0]) {
            cube([STRAP_BUCKLE_WALL * 2, 2, STRAP_WIDTH], center = true);
        }
    }
}

module hook() {
    // Horizontal lip
    translate([0, (BASE_WIDTH + depth_of_hook) / 2 + thickness_of_holder, height_of_holder - thickness_of_holder / 2]) {
        cube([width_of_holder, depth_of_hook, thickness_of_holder], center = true);
    }

    // Vertical hook
    translate([0, BASE_WIDTH / 2 + depth_of_hook + thickness_of_holder * 1.5, height_of_holder - height_of_hook / 2 - thickness_of_holder / 2]) {
        cube([width_of_holder, thickness_of_holder, height_of_hook + thickness_of_holder], true);
    }
}

module holder() {
    hanger();
    translate([0, -1, 0]) base();
    translate([0, -1, 0]) upper_collar();
}

module drawHolder() {
    // Curved back of holder
    difference() {
        holder();

        // Make back rounded to fit keg
        translate([0, BASE_WIDTH / 2 + thickness_of_holder + KEG_RADIUS - 0.5, 0]) {
            cylinder(h=height_of_holder - thickness_of_holder, r=KEG_RADIUS, center=false);
        }
    }

    // Add hook (outside of holder, to not be in the way for the curved back)
    hook();
}

module rotatedHolder() {
    //translate([0, 0, - OUTER_DIAMETER / 2])
        rotate([-90, 0, 0])
            drawHolder();
}

rotatedHolder();
//drawHolder();

```


[User]
I need to design an angle guide block, primarily for use with a hobby knife, and I'd like to be able to customize it. I'm thinking of something that would sit flat on a surface, and then have an angled face on which the blade would rest. I'd like to specify the angle. I'd also like to have an optional slot for a rubber band. The existing design I'm looking at has an embossed text for the angle, and this is something I like. It doesn't *have* to be embossed, though, as long as I can customize the text itself, and the position. It's important that the text for the angle is always positioned such that it's parallel to the angled face of the block.

So, to summarize:

1.  **Angle Guide Block:** A block with an angled face.
2.  **Customizable Angle:** The angle of the angled face should be adjustable via a parameter.
3.  **Optional Rubber Band Slot:** A rectangular slot for a rubber band, with a width that can be set to zero to effectively disable it.
4.  **Angle Text:** Text indicating the angle of the angled face.  This text should be parallel to the angled face and its position should be customizable, and should be able to be adjusted so that it doesn't interfere with the rubber band slot.
5. **Text Customization:** I'd like to be able to change the content of the text as well, and the font.

I think the best way to approach this would be to have a main module for the block, which calls a different module to create the optional band slot, and another one for the embossed angle text. I think I'd like to generate this from scratch, so don't worry about trying to base it off of any existing code. I don't have a preference for specific libraries.

[Assistant]
guide.scad:
```
// This work was created by David Turnbull and released under a
// Creative Commons Attribution 4.0 International License.

// Which part would you like to see?
part = "Main"; // [Main:Angle Guide Block,Text:Text For Multi Extruder]
// Blade guide angle
angle = 16; // [10:1:40]
// Rubber band slot width (0=none)
width = 0; // [0:6]

if (part == "Main") {
    bandselect();
} else {
    rotate([0,-angle,0])
    mark(1);
}

module bandselect() {
    ht = tan(angle) * (19-width/2) - 2.5;

    if (ht < 1.5) {
        banded(1.5);
    } else if (ht > 4) {
        banded(4);
    } else {
        banded(ht);
    }
}

module banded(ht) {
    difference() {
        fitted();

        translate([19-width/2,-1, ht])
        cube([width,22,20]);

        translate([19-width/2 , 19, ht - 1])
        filet();

        translate([19-width/2 , 1, ht - 1])
        rotate([90,0,0])
        filet();

    }

}

module filet() {
    difference() {
        cube([width, 1.01, 1.01]);

        rotate([0,90,0])
        translate([0,0,-1])
        cylinder(width + 2, 1, 1, $fn = 32);
    }
}

module fitted() {
    difference() {
        union() {
            rotate([0,-angle,0])
            embossed();

            translate([0,0,-1])
            cube([1,20,1]);

        }

        translate([25,-1,-2])
        cube([200,22,100]);

        translate([0,-1,-101])
        cube([200,22,100]);

    }

}

module embossed() {

    difference() {
        translate([0,0,-100])
        cube([100,20,100]);

        mark(1.01);
    }
}

module mark(ht) {
    if (width != 0) {
        mark2(8,ht);
    } else {
        mark2(12.5,ht);
    }
}

module mark2(x,ht) {
    adjx = sqrt(pow(tan(angle) * x,2) + pow(x,2)) - 4;

    translate([adjx,9.5,-1])
    rotate([0,0,-90])
    linear_extrude(height = ht) {
        text(text = str(angle,"\u00B0"),
            font = "Liberation Sans:style=Bold",
            size = 8,
            halign = "center"

        );
     }
}

```


[User]
I'm looking to create a parametric design for a Kawai Tsugite joint puzzle using OpenSCAD. I want to be able to adjust the size of the basic cube and the amount of play (tolerance) added for smooth assembly. The puzzle should include individual pieces and assemblies of multiple pieces, specifically 2, 4, and 8 piece arrangements.

The basic Kawai Tsugite piece should be formed by:
1. Starting with a cube.
2. Removing a pyramid from one corner.
3. Removing three triangular prisms. These prisms should be oriented 120 degrees apart and cut into the corner of the cube.
4. Adding a small tolerance/play for assembly, this should extend from the center of each cut prism perpendicular to the cube side, so that each cut out of each cube has some space to move along that axis.

The individual pieces should be placed to demonstrate the joint itself. I also want to design assemblies where:
1. Two pieces are connected end to end in a straight line using the Kawai joint.
2. Four pieces are assembled in a way where they interlock.
3. Eight pieces are assembled to form a larger cube.

I'd like the ability to parameterize:
*   `jl`: The side length of the main cube (in millimeters).
*   `eps`: The play/tolerance added for smooth assembly (in millimeters).
*  I would like the render to default to `$fn = 100` but to be customizable.

I'm not sure if this is doable but I would like all of these outputs to be generated from separate modules and then organized into a single file with all of the different modules. Is there any way to do this with OpenSCAD? I'm also not familiar with any of the OpenSCAD libraries, so I would like this to be built from base OpenSCAD functions.

[Assistant]
kawaiTsugite.scad:
```
// cube side size (mm)
jl = 15;

// add some play to allow a smooth fit (mm)
eps = 0.25;

$fn= 100;

// 3 prisms to be removed from the kawai face
module prisms(){
    for (i=[0:2])
 rotate([0,0,i*120-0])  translate([-jl,0,0]) cylinder(d = 2*jl, h = jl, center = false, $fn = 3);
} // end prisms

// the simple cubic joint
// ======================
module KawaiTsugite() {
    difference(){
        translate([0,0,-0.289*jl])rotate([0,-35.26+90,0])rotate([0,0,45]) cube([jl,jl,jl], center = true); // main cube
        translate([0,0,jl/2])cube([2*jl,2*jl,jl], center = true); // cut the top pyramid
        translate([0,0,-0.5775*jl-eps]) prisms(); // remove the 3 Kawai prisms
       translate([-eps/2,-jl,-0.5775*jl-eps]) cube([eps,2*jl,jl], center = false); // add some play
    rotate([0,0,120]) translate([-eps/2,-jl,-0.5775*jl-eps]) cube([eps,2*jl,jl], center = false); // add some play
} //end diff
} // end KawaiTsugite

// the puzzle piece with two Kawai extremities
// ===========================================
module double_Kawai(){
union(){
    rotate([0,35.26-90,-45])  translate([0,0,0.289*jl])KawaiTsugite();
  translate([jl,0,0]) rotate([-90,0,0]) rotate([0,35.26-90,-45+180])  translate([0,0,0.289*jl])KawaiTsugite();
} // end union
}

// 4 interlocked Kawai_Tsugite puzzle pieces
// =========================================
module quad_Kawai() {
    double_Kawai();
translate([jl,0,0]) rotate([-90,0,90]) double_Kawai();
translate([0,jl,0]) rotate([-90,0,-90]) double_Kawai();
translate([0,jl,0]) rotate([-90,180,-180]) double_Kawai();
}

*quad_Kawai();

double_Kawai();

// draw 2 interlocked kawai
*translate ([0,0,0.5775*jl])KawaiTsugite();
*color("red") rotate([0,0,60]) translate ([0,0,0])KawaiTsugite();
```


[User]
I'm looking to create a laptop stand that can hold multiple laptops side-by-side on my desk. I'd like it to be parametric, so I can adjust it for different sized laptops and spacing. I have a basic idea in mind, but I need help creating the OpenSCAD code.

Essentially, I want a series of supports, each looking something like a wide, shallow "U" shape laid on its side. The bottom of the "U" would be the base of the stand, and each side would support a laptop. I need to be able to adjust:

*   **`holderHeight`**: the vertical height of each upright portion of the "U."
*   **`holderDepth`**: the front-to-back depth of the stand.
*  **`laptopThickness`**: the thickness of the laptop each holder is designed for; this also determines the gap between the upright supports.
*   **`leftLegLength`**: the length of a small leg extending out from the bottom of the support in the front.
*   **`rightLegLength`**: the length of a leg extending out the back of the support along the base.
*   **`quarterRound`**: a radius for rounded corners at the base of each support uprights. These will act as a fillet for printing purposes.
*   **`numberOfHolders`**: the number of laptop holders I want in the stand. This should create more "U" shaped pieces next to each other to space multiple laptops.
* **`holderSpacing`**: The gap between each upright support; this will allow me to space the laptops a certain distance.

So, for example, if I set `numberOfHolders` to 3, I'd get three "U" shaped stands, all joined together. The parameters like `holderDepth`, `laptopThickness`, and leg lengths would apply to *each* individual stand in the series.

I'd like to have the rounded corners or fillets on the inside base of each upright to make it easier to print. I would prefer to use the `hull()` operation for creating the rounded corners.

Also, to make the base a solid piece, I'd like the legs to be a connected base underneath the entire row of laptop holders.

I don't need a separate scad file for any library, just the main one that will generate the model.

Could you generate the OpenSCAD code for this?

[Assistant]
LaptopHolder.scad:
```
$fn=50;
holderHeight=100;
holderDepth=120;
laptopThickness=29;
leftLegLength=20;
rightLegLength=50;
quarterRound=12;

union(){
    //left holder upgright
    roundedcube([holderDepth,5,5+holderHeight], false,2,"zmax");

    //right holder upgright
    translate([0,5+laptopThickness,0]) roundedcube([holderDepth,5,5+holderHeight], false,2,"zmax");

    //base under laptop
    roundedcube([holderDepth,10+laptopThickness,5],false,2,"zmax");

    //left leg
    translate ([0,-leftLegLength],0) roundedcube([holderDepth,leftLegLength+5,5],false,2,"zmax");

    //right leg
    translate ([0,5+laptopThickness,0]) roundedcube([holderDepth,rightLegLength+5,5],false,2,"zmax");

    // left holder quarter round
    difference(){
        union() {
            translate([quarterRound,0,5]) rotate([0,90,0]) cylinder(r=quarterRound, h=holderDepth-quarterRound*2);
            translate([quarterRound,0,5]) sphere(r=quarterRound);
            translate([quarterRound+holderDepth-quarterRound*2,0,5]) sphere(r=quarterRound);

            // right holder quarter round
            translate([quarterRound,10+laptopThickness,5]) rotate([0,90,0]) cylinder(r=quarterRound, h=holderDepth-quarterRound*2);
            translate([quarterRound,10+laptopThickness,5]) sphere(r=quarterRound);
            translate([quarterRound+holderDepth-quarterRound*2,10+laptopThickness,5]) sphere(r=quarterRound);
        }
    translate([0,-leftLegLength,-50])cube([holderDepth,leftLegLength+10+rightLegLength,50]);
    translate([0,5-1,4]) cube([holderDepth,laptopThickness+2,quarterRound+1]);

    }

}

// More information: https://danielupshaw.com/openscad-rounded-corners/ for below module
module roundedcube(size = [1, 1, 1], center = false, radius = 0.5, apply_to = "all") {
	// If single value, convert to [x, y, z] vector
	size = (size[0] == undef) ? [size, size, size] : size;

	translate_min = radius;
	translate_xmax = size[0] - radius;
	translate_ymax = size[1] - radius;
	translate_zmax = size[2] - radius;

	diameter = radius * 2;

	obj_translate = (center == false) ?
		[0, 0, 0] : [
			-(size[0] / 2),
			-(size[1] / 2),
			-(size[2] / 2)
		];

	translate(v = obj_translate) {
		hull() {
			for (translate_x = [translate_min, translate_xmax]) {
				x_at = (translate_x == translate_min) ? "min" : "max";
				for (translate_y = [translate_min, translate_ymax]) {
					y_at = (translate_y == translate_min) ? "min" : "max";
					for (translate_z = [translate_min, translate_zmax]) {
						z_at = (translate_z == translate_min) ? "min" : "max";

						translate(v = [translate_x, translate_y, translate_z])
						if (
							(apply_to == "all") ||
							(apply_to == "xmin" && x_at == "min") || (apply_to == "xmax" && x_at == "max") ||
							(apply_to == "ymin" && y_at == "min") || (apply_to == "ymax" && y_at == "max") ||
							(apply_to == "zmin" && z_at == "min") || (apply_to == "zmax" && z_at == "max")
						) {
							sphere(r = radius);
						} else {
							rotate =
								(apply_to == "xmin" || apply_to == "xmax" || apply_to == "x") ? [0, 90, 0] : (
								(apply_to == "ymin" || apply_to == "ymax" || apply_to == "y") ? [90, 90, 0] :
								[0, 0, 0]
							);
							rotate(a = rotate)
							cylinder(h = diameter, r = radius, center = true);
						}
					}
				}
			}
		}
	}
}
```


[User]
Okay, I'm looking to design a customizable shower head holder mount, and I want it to be pretty flexible. I've seen some designs that are close but I want to be able to tweak them pretty extensively, so I'm hoping you can help me generate the OpenSCAD code for this.

Basically, I need a shower head holder that attaches to various mounting options. Here are the main parameters I want to be able to control:

**Holder Parameters:**
*   **holder\_height**: The overall height of the shower head holder (e.g., 30mm).
*   **holder\_wall\_width**: The thickness of the holder wall (e.g., 7mm).
*   **holder\_top\_diameter**: The inner diameter of the top of the holder (e.g., 24mm).
*   **holder\_bottom\_diameter**: The inner diameter of the bottom of the holder (e.g., 21mm).
*  **holder\_angle**: The angle at which the holder tilts forward (e.g., 10 degrees).
*   **holder\_hole\_width**: The width of the hole in the front of the holder (e.g., 16mm).

**Mounting Options:**

I'd like to have these mounting options, and I need to be able to choose between them:

1.  **Spool Mount:** A spool shape that attaches to the holder, for bolting on.
    *   **width\_of\_spool**: The width of the spool (e.g., 31mm).
    *   **spool\_bolt\_hole**: The diameter of the bolt hole in the spool (e.g., 7mm).
    *   **diameter\_of\_spool**: The outer diameter of the spool (e.g., 30mm).
    *  **thickness\_of\_disks**: The thickness of the disks on each end of the spool (e.g., 4mm).
    * **diameter\_of\_cylinder**: The diameter of the central cylinder part of the spool (e.g., 16mm).
2.  **Cylinder Mount:** A cylindrical mount similar to the spool, but without the disks.
    *   Uses same dimensions as the spool mount (width\_of\_spool, spool\_bolt\_hole, diameter\_of\_spool).
3.  **Wall Mount:** A flat mount with screw holes.
    *   **width\_of\_mount**: The width of the wall mount (e.g., 50mm).
    *   **height\_of\_mount**: The height of the wall mount (e.g., 30mm).
    *   **depth\_of\_mount**: The depth of the wall mount (e.g., 10mm).
4.  **Round Wall Mount:** A circular wall mount, also with screw holes.
    *   Uses same size dimensions as the wall mount (width\_of\_mount, height\_of\_mount, depth\_of\_mount).
5. **Rod Screw Mount:** A mount that attaches to a rod using a screw-tightening system.
    *   **diameter\_of\_rod**: The diameter of the rod to mount on (e.g. 18mm).
    *   Uses same size dimensions as the wall mount (width\_of\_mount, height\_of\_mount, depth\_of\_mount).
6.  **Rod Clip-on Mount:** A mount that clips onto a rod.
    *   **diameter\_of\_rod**: The diameter of the rod to mount on (e.g. 18mm).
    *    Uses same size dimensions as the wall mount (width\_of\_mount, height\_of\_mount, depth\_of\_mount).

**Mount Customization:**

*   **use\_rounded\_edge**: A boolean option to have rounded edges on the mount (yes/no).
*   **width\_of\_rounded\_edge**: Width of the rounded edge (e.g., 15mm).
*   **use\_mount\_holes**: A boolean to include screw holes in mounts (yes/no).
*   **diameter\_of\_mount\_holes**: Diameter of the screw holes (e.g., 7mm).

**Cutout Option:**
*   **cutout\_type**: A selector for a cutout in the mount (0=None, 1=Left side, 2=Right side). This is only used for spool and cylinder mounts.
*   **depth\_of\_cutout**: Depth of the cutout (e.g., 2.4mm).
*   **angle\_of\_cutout**: Angle of the slice for the cutout (e.g., 75 deg).
*   **rotation\_of\_cutout**: Rotation of the cutout on the mount (e.g., 215 deg).

I'd like to have all of these as parameters I can adjust in the customizer. It would be great if the code was well-organized, maybe using modules for each mount type and the holder itself. Let me know if you need any clarification, and thanks for the help!

[Assistant]
customizable_shower_head_holder_mount.scad:
```
// Customizable Shower Head Holder Mount
// Copyright: Olle Johansson 2018
// License: CC BY-SA

//CUSTOMIZER VARIABLES

/* [Mount] */

// Choose mounting option
type_of_mount = 5; // [1:Spool, 2:Cylinder, 3:Wall mount, 4:Round wall mount, 5:Rod screw mount, 6:Rod clipon mount]

/* [Holder] */

// Height in mm of shower head holder
holder_height = 30; // [15:40]

// Width in mm of holder wall
holder_wall_width = 7; // [4:12]

// Top inner diameter of holder in mm
holder_top_diameter = 24; // [18:30]

// Bottom inner diameter of holder in mm
holder_bottom_diameter = 21; // [16:30]

// Angle of holder
holder_angle = 10; // [0:25]

// Width in mm of hole in holder wall
holder_hole_width = 16; // [10:20]

/* [Mount sizes] */

// Width in mm of wall mount
width_of_mount = 50; // [45:60]

// Height in mm of wall mount
height_of_mount = 30; // [20:40]

// Depth in mm of wall mount
depth_of_mount = 10; // [8:15]

/* [Rounded edge] */

// Whether to have rounded edges on mount
use_rounded_edge = "yes"; // [yes,no]

// Width in mm of rounded edge
width_of_rounded_edge = 15; // [10:20]

/* [Mount holes] */

// Should screw holes be added to mount?
use_mount_holes = "yes"; // [yes,no]

// Diameter in mm of mount screw hole
diameter_of_mount_holes = 7; // [4:10]

/* [Rod Screw Mount] */

// Diameter in mm of rod to mount on
diameter_of_rod = 18; // [15:25]

/* [Spool/Cylinder] */

// Width in mm of spool/cylinder
width_of_spool = 31; // [20:40]

// Diameter in mm of hole in spool/cylinder
spool_bolt_hole = 7; // [6:10]

// Diameter in mm of spool/cylinder
diameter_of_spool = 30; // [25:40]

// Thickness in mm of disks on spool
thickness_of_disks = 4; // [3:8]

// Diameter in mm of middle of spool
diameter_of_cylinder = 16; // [11:24]

/* [Cutout] */

// Add a cutout notch in the side of the spool/cylinder
cutout_type = 1; // [0:None, 1:Left side, 2:Right side]

// Depth in mm of cutout in mount
depth_of_cutout = 2.4; // [1:4]

// Angle of cutout slice
angle_of_cutout = 75; // [30:90]

// Rotation in degrees of cutout
rotation_of_cutout = 215; // [0:360]

//CUSTOMIZER VARIABLES END

/* [Hidden] */

$fn=100;

module slice(r = 10, deg = 30) {
    degn = (deg % 360 > 0) ? deg % 360 : deg % 360 + 360;
    difference() {
        circle(r);

        if (degn > 180)
            intersection_for(a = [0, 180 - degn])
                rotate(a)
                translate([-r, 0, 0])
                square(r * 2);
        else
            union()
                for(a = [0, 180 - degn])
                    rotate(a)
                    translate([-r, 0, 0])
                    square(r * 2);
    }
}

module spool_cutout(left_or_right) {
    position = (width_of_spool / 2 - depth_of_cutout / 2);
    mirror([0, 0, left_or_right])
    rotate([0, 0, rotation_of_cutout])
    translate([0, 0, position])
    linear_extrude(height = depth_of_cutout, center = true)
    slice(r = diameter_of_spool / 2 + 1, deg = angle_of_cutout);
}

module spool() {
    difference() {
        cylinder(h = width_of_spool, d = diameter_of_spool, center = true);

        // Remove middle part of cylinder
        cylinder(h = width_of_spool - thickness_of_disks * 2, d = diameter_of_spool, center = true);

        // Add a cutout notch in the side of the spool
        if (cutout_type != 0) spool_cutout(cutout_type - 1);
    }

    // Thin center cylinder
    cylinder(h = width_of_spool, d = diameter_of_cylinder, center = true);
}

module spool_mount() {
    translate([0 - diameter_of_spool / 2 + diameter_of_cylinder / 2, 0, 2])
    rotate([90, 0, 0])
    difference() {
        spool();
        cylinder(h = width_of_spool, d = spool_bolt_hole, center = true);
    }
}

module cylinder_mount() {
    translate([0 - diameter_of_spool / 2 + diameter_of_cylinder / 2, 0, 2])
    rotate([90, 0, 0])
    difference() {
        cylinder(h = width_of_spool, d = diameter_of_spool, center = true);
        cylinder(h = width_of_spool, d = spool_bolt_hole, center = true);

        // Add a cutout notch in the side of the spool
        if (cutout_type != 0) spool_cutout(cutout_type - 1);
    }
}

module rounded_edge(width, depth, height, edge_scale) {
    translate([width / 2, 0 - depth / 2, 0])
        scale([1, edge_scale, 1])
        cylinder(h = height, r = width_of_rounded_edge, center = true);
}

module mount_hole(width, depth) {
    rotate([90, 0, 0])
    //translate([width_of_mount / 2 - width_of_rounded_edge / 2, 0, 0]) {
    translate([width / 2 - diameter_of_mount_holes - 1, 0, 0]) {
        cylinder(h = depth, d = diameter_of_mount_holes, center = true);

        // Screw head shoulder
        translate([0, 0, depth / 4])
        cylinder(h = depth / 2, d = diameter_of_mount_holes * 2, center = true);
    }
}

module screw_holes() {
    if (use_mount_holes == "yes") {
        mount_hole(width_of_mount, depth_of_mount);
        mirror([1, 0, 0]) mount_hole(width_of_mount, depth_of_mount);
    }
}

module rounded_edges(height) {
    if (use_rounded_edge == "yes") {
        rounded_edge(width_of_mount, depth_of_mount, height, 0.25);
        mirror([1, 0, 0]) rounded_edge(width_of_mount, depth_of_mount, height, 0.25);
    }
}

module round_wall_mount() {
    translate([0 - depth_of_mount / 2 - 1, 0, 2])
    rotate([0, 0, 90])
    difference() {
        rotate([90, 0, 0])
        cylinder(d = width_of_mount, h = depth_of_mount, center = true);

        rounded_edges(width_of_mount);
        screw_holes();
    }
}

module wall_mount() {
    translate([0 - depth_of_mount / 2, 0, 2])
    rotate([0, 0, 90])
    difference() {
        cube([width_of_mount, depth_of_mount, height_of_mount], center = true);

        rounded_edges(height_of_mount);
        screw_holes();
    }
}

module rod_hole() {
    cylinder(h = height_of_mount, d = diameter_of_rod, center = true);
}

module rod_screw_plate() {
    translate([0 - depth_of_mount / 2, 0, 2])
    rotate([0, 0, 90])
    difference() {
        cube([width_of_mount, depth_of_mount, height_of_mount], center = true);

        rounded_edges(height_of_mount);
        screw_holes();
        translate([0, depth_of_mount / 2, 0])
        rod_hole();
    }
}

module rod_screw_mount() {
    rod_screw_plate();
    translate([0, 0, height_of_mount + 10])
        rod_screw_plate();
}

module rod_clipon_mount() {
    depth = diameter_of_rod + 10;
    translate([0 - depth / 2, 0, 2])
    rotate([0, 0, 90])
    difference() {
        translate([-2, 0, 0])
        cube([depth - 5, depth, height_of_mount], center = true);

        translate([depth / 4, 0, 0])
        cube([depth / 2, diameter_of_rod * 0.9, height_of_mount], center = true);
        rod_hole();
    }
}

module holder() {
    translate([holder_top_diameter / 2, 0, 0])
    rotate([0, holder_angle, 0])
    difference() {
        cylinder(h = holder_height, d1 = holder_bottom_diameter + holder_wall_width, d2 = holder_top_diameter + holder_wall_width, center = true);
        cylinder(h = holder_height, d1 = holder_bottom_diameter, d2 = holder_top_diameter, center = true);

        // Chamfer on top edge
        translate([holder_top_diameter / 2 + holder_wall_width / 2, 0, holder_height / 2])
        rotate([0, 40, 0])
        cube([holder_top_diameter, holder_top_diameter * 1.5, 10], center=true);

        // Chamfer on bottom edge
        translate([holder_top_diameter / 2 + holder_wall_width / 2, 0, 0 - holder_height / 2])
        rotate([0, -40, 0])
        cube([holder_top_diameter, holder_top_diameter * 1.5, 10], center=true);

        // Front hole
        translate([holder_top_diameter / 2.5, 0, 0])
            cube([holder_top_diameter / 2 + holder_wall_width, holder_hole_width, holder_height], center = true);
    }
}

module mount() {
    if (type_of_mount == 1) spool_mount();
    else if (type_of_mount == 2) cylinder_mount();
    else if (type_of_mount == 3) wall_mount();
    else if (type_of_mount == 4) round_wall_mount();
    else if (type_of_mount == 5) rod_screw_mount();
    else if (type_of_mount == 6) rod_clipon_mount();
}

module shower_holder() {
    difference() {
        mount();
        hull() holder();
    }
    holder();
}

shower_holder();

```


[User]
I'd like to design a gear or cog-like object, but with some specific parameters and a more flexible way of handling diameters. I'm using OpenSCAD, and I'd like the design to be parametric so I can easily adjust things.

Here's what I need:

*   **Core Donut:** There should be a central donut shape. I need to be able to set the *internal diameter* of this donut.  Crucially, I need this to be a *true diameter*, not a radius, and it should accept fractional values, like 40.5. There will also be a central *hole diameter*, which should also accept fractional values and be used to cut a hole through the center. I'd like to set the overall *height* of this donut.

*   **Cogs:** Around the outside of the donut should be cogs or teeth. I need to set the *number of cogs*. The cogs should have a base, and a tip. The cog's total length from the donut edge should be a parameter, and so should the width of the cog base, the height of the cog base, the width of the cog tip, and the height of the cog tip.  Also important: part of the cog has no angle, and I need a parameter to set how much of the length of the cog does *not* have an angle before the tip starts to taper in.

*   **Build Plate Considerations:** I need to be able to specify what kind of build plate is being used, or provide manual X and Y dimensions for a build plate, and use that for the base of the model. This can use a 'build_plate' module from a library, if you know of one.

*   **Resolution:** I also want to set the resolution of the circles in the model.

*   **Color:** I want the final object to be colorable.

I'm not sure what libraries are typically used for build plates, but if you are using some, please let me know which ones they are!

I'd like the file(s) to be generated from scratch to avoid any issues from previously coded attempts. Thanks!

[Assistant]
modulkugg3-true_diameter_v2.scad:
```

use <utils/build_plate.scad>

//set your build plate
build_plate_selector = 0; //[0:Replicator 2,1: Replicator,2:Thingomatic,3:Manual]

//if set to "manual" set the  build plate x dimension
build_plate_manual_x = 100; //[100:400]

//if set to "manual" set the  build plate y dimension
build_plate_manual_y = 100; //[100:400]

build_plate(build_plate_selector,build_plate_manual_x,build_plate_manual_y);

//Size of the internal donut.
internal_diameter=40;

//Size of the Shaft hole.
hole_diameter=2;

//Donut height.
height=3;

//Resolution of the donut.
res = 50;		//[1:100]

//Number of Cogs.
cogs=20;

//Total length of the cog.
cog_length=4;

//Width of the cogs base.
cog_base_width=3;

//Height of the cogs base.
cog_base_height=3;

//Width of the tip.
cog_tip_width=1;

//Height of the tip.
tip_height=3;

//Amount of the cog length, which lacks angle, aka height of the cogbase.
no_angle = 3;

module cog(){

	union(){
		difference(){

			translate ([0,0,0]){
				cylinder(height,internal_diameter/2,internal_diameter/2, $fn = res, center=true) ;
			}

			translate ([0,0,0]){
				cylinder(height+2,hole_diameter/2,hole_diameter/2, $fn = res, center=true);

			}
		}
	}

	for ( i = [0 : (cogs-1)] ){			//the spikes
		hull(){
    		rotate( i * 360 / cogs, [0, 0, 1])
    			translate([internal_diameter/2,0,0]){
    				cube ([no_angle*2,cog_base_width,cog_base_height],center=true);
						translate([cog_length,0,0]) {
							cube ([.1,cog_tip_width,tip_height],center=true);
						}
				}

		}
	}
}

translate([0,0,height/2]){
	color([0,0.6,0.8]){
		cog();
	}
}

```


[User]
I'm looking to create a customizable grade crossing for O gauge model trains, specifically for tubular track. I'd like the design to be parametric in OpenSCAD so I can easily adjust it for different track curves and lengths. The design should include the option for ramps leading up to the crossing, and should print without supports.

Here's a breakdown of what I need:

1.  **Curved Track Support:** The crossing needs to accommodate different track diameters, specifically O-31 (28.6"), O-42 (40.75"), O-54 (53.3"), and O-72 (72.5") - these are center-rail to center-rail measurements in inches. I should be able to specify the diameter as a parameter.

2.  **Crossing Length:** The length of the crossing should be adjustable in inches. I'd like to be able to specify, for instance, a 6 inch crossing or a shorter 3 inch crossing for different road types.

3.  **Crossing Width:** The width of each crossing segment should be customizable but should default to around 0.4 inches for the top width (where the train wheels roll) and 0.15 inches less for the bottom width.

4.  **Number of Sections:**  The crossing should be constructed from a number of segments, also an adjustable parameter.  5 sections per piece is a good starting point.

5.  **Ramps:** The design should have optional ramps leading up to the crossing. These should be adjustable in terms of height, length and thickness.
    *   A starting point for ramp height should be around 0.717 inches, with ramp length at 3 inches, and ramp thickness at 0.1 inches.
    *   I need the ability to select between printing a "grade" crossing alone, a "ramp" alone (where it's designed to be flipped when printing), or both (where the ramps would be just for reference and not printed).

6.  **Clearance:**  The crossing needs to sit slightly below the top of the rails - say, around 0.07 inches or so, and it needs to provide clearance for the rail ties and center rail insulator. The design should have a slight ledge on the bottom to sit around the rail.

7.  **Board Spacing:** I'd like to incorporate a small spacing between the planks in the design, maybe around 0.02 inches. This will help with a realistic appearance.

8.  **Units:** Please use inches as the primary unit for all parameters, with a conversion to millimeters internally.

Could you generate the OpenSCAD code for this? I don't have any libraries that I explicitly use, but if you find any that are useful, please make sure to use them.

[Assistant]
Grade_Crossing_Curved.scad:
```
//
//  Customizable Curved Grade Crossing - Lionel O Tubular Track
//  Mark DiVecchio
//  March 2018
//  Original development using OpenSCAD 2017.01.20
//
// This SCAD script is licensed under a
// Creative Commons Attribution-NonCommercial 3.0 Unported License.
//
// V1.0 - original release
// V2.0 - adds ramps
//
// http://www.silogic.com/trains/layout.html
//
// in slicer, rotate y = 180 deg, rotate z = 45 deg (to get long print lines)
// use 2 bottom layers, 0 top layers, rectilinear bottom layers
//
$fn=200*1;
//
// CUSTOMIZING
//

/* Configuration */
// Length of the crossing in inches
Piece_Length = 6;    // [3:0.5:10]
// Diameters were taken from measurements of circles
// using the RR-Track program. [O-31, O-42, O-54, O-72]
// in inches from center rail to center rail
// Track Diameter
Diameter = 72.5;   //[28.6:O-31, 40.75:O-42, 53.3:O-54, 72.5:O-72]
// Width of each crossing segment in inches (Leave enough space for the wheel flanges)
Top_Width = 0.4;
// Number of sections to break the crossing into
Sections_per_Piece = 5;   //[1:10]
// Create grade crossing or ramp (will invert the ramps for printing)?
To_Print = "grade"; // [grade,ramp]
// Ramp Height in inches
Ramp_Height = 0.717;
// Ramp Length in inches
Ramp_Length = 3; //[2:10]
// Ramp Thickness in inches
Ramp_Thickness = 0.1;  //[0.1,0.15,0.2,0.25]//
//
/* [Hidden] */
// Bottom Width
Bottom_Width = Top_Width - 0.25;
// Height
Height = 0.319;
// Ledge
Ledge = 0.100;
// Conversion inches to millimeters
inch=25.4;
// Board Spacing slot
Board_Space = 0.02;

print_part();

  /////////////
 // Modules //
/////////////

module print_part() {

translate([ -(Diameter * inch)/2, 0, 0 ])
  {
  if (To_Print == "grade") difference() {
    union () {
       translate([0,0,0])
         InnerCurvedCrossing(Diameter);
       translate([Board_Space * inch,0,0])
         OuterCurvedCrossing(Diameter);
       translate([(Board_Space * 1) * -1 * inch,0,0])
         Inner2CurvedCrossing(Diameter);
       translate([(Board_Space * 2) * 1 * inch,0,0])
         Outer2CurvedCrossing(Diameter);
       }

    union () {
        for (chunks = [1 : Sections_per_Piece]) {
            rotate([0,0,(Piece_Length* chunks/Sections_per_Piece) / (2 * 3.14159 * (Diameter/2)) * 360]) Slots();
            }
        }
    }
  if (To_Print == "ramp") {
    rotate([180, 0, 0]) {
        translate([0,0,0])
            InnerCurvedRamp(Diameter);
        translate([0,0,0])
            OuterCurvedRamp(Diameter);
       }
   }
  if (To_Print == "grade") {
        %translate([0,0,0])
            InnerCurvedRamp(Diameter);
        %translate([0,0,0])
            OuterCurvedRamp(Diameter);
      }
  }
}

module InnerCurvedRamp(D) {
    translate([0,, 0, -(Ramp_Height - Height) * inch])
    rotate_extrude(angle=(Piece_Length / (2 * 3.14159 * (D/2))) * 360)
    translate([(D/2 - (2 *Top_Width) - (2 * Board_Space) - Ramp_Length) * inch, 0, 0])
    rotate([0, 0, To_Print=="ramp" ? -atan(Ramp_Height/Ramp_Length): 0])
    polygon([[0,0],
        [Ramp_Length * inch, Ramp_Height * inch],
        [Ramp_Length * inch, (Ramp_Height - Ramp_Thickness) * inch],
        [(Ramp_Length - 0.5) * inch, (Ramp_Height - Ramp_Thickness - (0.5) * (Ramp_Height / Ramp_Length)) * inch],
        [(Ramp_Length - 0.5) * inch, 0],
        [(Ramp_Length - 0.5 - Ramp_Thickness) * inch, 0],
        [(Ramp_Length - 0.5 - Ramp_Thickness) * inch, (Ramp_Height - Ramp_Thickness - (0.5 + Ramp_Thickness) * (Ramp_Height / Ramp_Length)) * inch],
        [(Ramp_Thickness * Ramp_Length / Ramp_Height) * inch, 0]
        ]);
}

module OuterCurvedRamp(D) {
    translate([0,, 0, -(Ramp_Height - Height) * inch])
    rotate_extrude(angle=(Piece_Length / (2 * 3.14159 * (D/2))) * 360)
    translate([(D/2 + (2 *Top_Width) + (3 * Board_Space) + Ramp_Length) * inch, 0, 0])
    rotate([0,180,0])
    rotate([0, 0, To_Print =="ramp" ? -atan(Ramp_Height/Ramp_Length): 0])
    polygon([[0,0],
        [Ramp_Length * inch, Ramp_Height * inch],
        [Ramp_Length * inch, (Ramp_Height - Ramp_Thickness) * inch],
        [(Ramp_Length - 0.5) * inch, (Ramp_Height - Ramp_Thickness - (0.5) * (Ramp_Height / Ramp_Length)) * inch],
        [(Ramp_Length - 0.5) * inch, 0],
        [(Ramp_Length - 0.5 - Ramp_Thickness) * inch, 0],
        [(Ramp_Length - 0.5 - Ramp_Thickness) * inch, (Ramp_Height - Ramp_Thickness - (0.5 + Ramp_Thickness) * (Ramp_Height / Ramp_Length)) * inch],
        [(Ramp_Thickness * Ramp_Length / Ramp_Height) * inch, 0]
        ]);
}

module InnerCurvedCrossing(D) {
// Main Inner curved body
echo("Inner: angle ", (Piece_Length / (2 * 3.14159 * (D/2))) * 360);
  rotate_extrude(angle=(Piece_Length / (2 * 3.14159 * (D/2))) * 360)
    translate([(D/2 - Top_Width) * inch,0,0])
    rotate([0, 0, 0])
    polygon([[0,0],         // 1
            [0,(Height) * inch],    // 2
            [((Top_Width/3) - Board_Space)* inch,(Height) * inch],  // a
            [((Top_Width/3) - Board_Space)* inch,(Height - Board_Space) * inch],  // b
            [((Top_Width/3))* inch,(Height - Board_Space) * inch],  // c
            [((Top_Width/3))* inch,(Height) * inch],  // d
            [((Top_Width * 2 / 3) - Board_Space)* inch,(Height) * inch],  // e
            [((Top_Width * 2 / 3) - Board_Space)* inch,(Height - Board_Space) * inch],  // f
            [((Top_Width * 2 / 3))* inch,(Height - Board_Space) * inch],  // g
            [((Top_Width * 2 / 3))* inch,(Height) * inch],  // h
            [(Top_Width) * inch, (Height) * inch],   // 3
            [(Top_Width) * inch,(Height - Ledge) * inch],    // 4
            [(Bottom_Width) *inch, 0]]);     // 5
}

module OuterCurvedCrossing(D) {
// Main Outer curved body
echo("Outer: angle ", (Piece_Length / (2 * 3.14159 * (D/2))) * 360);
  rotate_extrude(angle=(Piece_Length / (2 * 3.14159 * (D/2))) * 360)
    translate([(D/2 + Top_Width) * inch,0,0])
    rotate([0,180,0])
    polygon([[0,0],         // 1
            [0,(Height) * inch],    // 2
            [((Top_Width/3) - Board_Space)* inch,(Height) * inch],  // a
            [((Top_Width/3) - Board_Space)* inch,(Height - Board_Space) * inch],  // b
            [((Top_Width/3))* inch,(Height - Board_Space) * inch],  // c
            [((Top_Width/3))* inch,(Height) * inch],  // d
            [((Top_Width * 2 / 3) - Board_Space)* inch,(Height) * inch],  // e
            [((Top_Width * 2 / 3) - Board_Space)* inch,(Height - Board_Space) * inch],  // f
            [((Top_Width * 2 / 3))* inch,(Height - Board_Space) * inch],  // g
            [((Top_Width * 2 / 3))* inch,(Height) * inch],  // h
            [(Top_Width) * inch, (Height) * inch],
            [(Top_Width) * inch,(Height - Ledge) * inch],
            [(Bottom_Width) *inch, 0]]);
}
module Slots() {
    translate([0,Board_Space/2 * inch, ((Board_Space/2) + Height - Board_Space) * inch])
        rotate([0, 90, 0])
        linear_extrude(height = (Diameter/2 + (Top_Width * 4)) * inch)
        square(size = Board_Space * inch, center = true);

}
module Inner2CurvedCrossing(D) {
// Main Inner curved body
echo("Inner2: angle ", (Piece_Length / (2 * 3.14159 * (D/2))) * 360);
  rotate_extrude(angle=(Piece_Length / (2 * 3.14159 * (D/2))) * 360)
    translate([(D/2 - (Top_Width * 2)) * inch,0,0])
    polygon([[0,0],         // 1
            [0,(Height) * inch],    // 2
            [((Top_Width/3) - Board_Space)* inch,(Height) * inch],  // a
            [((Top_Width/3) - Board_Space)* inch,(Height - Board_Space) * inch],  // b
            [((Top_Width/3))* inch,(Height - Board_Space) * inch],  // c
            [((Top_Width/3))* inch,(Height) * inch],  // d
            [((Top_Width * 2 / 3) - Board_Space)* inch,(Height) * inch],  // e
            [((Top_Width * 2 / 3) - Board_Space)* inch,(Height - Board_Space) * inch],  // f
            [((Top_Width * 2 / 3))* inch,(Height - Board_Space) * inch],  // g
            [((Top_Width * 2 / 3))* inch,(Height) * inch],  // h
            [(Top_Width) * inch, (Height) * inch],
            [(Top_Width) * inch,(Height - Ledge) * inch],
            [(Bottom_Width) *inch, 0]]);
}

module Outer2CurvedCrossing(D) {
// Main Outer curved body
echo("Outer2: angle ", (Piece_Length / (2 * 3.14159 * (D/2))) * 360);
  rotate_extrude(angle=(Piece_Length / (2 * 3.14159 * (D/2))) * 360)
    translate([(D/2 + (Top_Width * 2)) * inch,0,0])
    rotate([0,180,0])
    polygon([[0,0],         // 1
            [0,(Height) * inch],    // 2
            [((Top_Width/3) - Board_Space)* inch,(Height) * inch],  // a
            [((Top_Width/3) - Board_Space)* inch,(Height - Board_Space) * inch],  // b
            [((Top_Width/3))* inch,(Height - Board_Space) * inch],  // c
            [((Top_Width/3))* inch,(Height) * inch],  // d
            [((Top_Width * 2 / 3) - Board_Space)* inch,(Height) * inch],  // e
            [((Top_Width * 2 / 3) - Board_Space)* inch,(Height - Board_Space) * inch],  // f
            [((Top_Width * 2 / 3))* inch,(Height - Board_Space) * inch],  // g
            [((Top_Width * 2 / 3))* inch,(Height) * inch],  // h
            [(Top_Width) * inch, (Height) * inch],
            [(Top_Width) * inch,(Height - Ledge) * inch],
            [(Bottom_Width) *inch, 0]]);
}
```


[User]
I'm looking to have a custom design created for 3D printing cup clips. These are small, clip-on attachments that can be placed on a cup's rim, sort of like a clothespin but cylindrical. The primary feature is that each clip has a unique monogram on it, allowing people to identify their cup.

Here's a detailed breakdown of what I need:

1.  **Core Clip Shape:** The base should be a roughly cylindrical shape. Imagine a short section of a pipe, but with a cut-out on one side that forms a "c" shape to allow it to grip the cup rim. So, basically it should have an outer diameter and an inner diameter creating a wall thickness, and then a section removed from that ring to form the grip.
2.  **Monogram:** I'd like to be able to specify a single letter that will be prominently displayed on the outside of the cylinder. The letter should be extruded or raised off the surface of the clip. Please include the option to change font, font size, and letter.
3.  **Open End (Gap):** The open end of the "c" shape needs to be adjustable to accommodate varying cup rim thickness. I'd like to be able to control the size of that gap parametrically.
4.  **Parametric Design:** I'm envisioning a completely parametric design, where I can control parameters like:
    *   Outer diameter of the clip
    *   Inner diameter of the clip
    *   Extrusion height (i.e., clip thickness)
    *   Gap size of the "c" opening.
    *  The letter used in the monogram
    *  The font used for the monogram
    *  The font size for the monogram

I would prefer this to be implemented in a single OpenSCAD file. I would not require any external libraries.

I intend to 3D-print this design. Thanks!

[Assistant]
cupclip.scad:
```
/*
@author: matt@misbach.org
@date: 3/6/2018

Description: Cup Clip
*/

letter="G";
textSize=7;
font="Arial Black";
opening=2;
$fn = 40;

	difference() {
		// Clip
		difference() {

			union() {
				// Monogram
				rotate([0,90,0])
					translate([-5,0,-10.5]) {
						linear_extrude(height=21)
							text(letter, size=textSize, font=font, halign="center", valign="center");
					}

				// Outer diameter
				cylinder(h=10, d=20);
			}

			// Inner diameter
			cylinder(h=10, d=17);
		}

		// Open end
		translate ([0,-10,3])
			cube([opening,10,15], true);
	}

```


[User]
Hey, I'm looking to get a parametric tablet stand designed in OpenSCAD. I want it to be able to hold a tablet or phone, and it should be relatively simple in design.

Here's what I'm thinking for the basic shape: it should be based on a rectangle with two rounded ends (sort of like a pill shape in 2D). Then, that shape should be extruded to give it a height. The stand should have a cutout on the top at an angle to hold the tablet or phone, and this cutout should extend across the width of the stand, though the sides of the cutout don't need to reach the absolute ends of the width of the stand.

I'd like to be able to specify a few parameters:

*   `Tablet_thickness`: The thickness of the device that the stand will hold.
*   `Version`:  This should be a string that can be either "both", "right", or "left". "Both" would mean that you create two of these stands side-by-side, with the cutouts facing opposite directions, suitable to cradle a device. "Right" would just be the single stand on the right of the "both" setup, and "left" would be the single stand on the left of the "both" setup.
*   `width`: The width of the stand's base, which should also affect the diameter of the circular ends.
*   `Height`: The extrusion height of the stand.
*   `lengh`: The length of the rectangular part of the base of the stand.
*   `angle`: The angle of the cutout relative to the top of the base, in degrees.

The cutout should start at some small offset from the front edge of the stand, and the cutout should have a depth greater than the tablet thickness. Also the cutout depth will need to project down quite a bit from the top of the stand, and cut all the way through the base if possible, to accommodate the angle I want to put my tablet at. The width of the cutout should be less than the base of the width by 4 mm, and be centered, and be extruded up quite high to ensure that the area is cut out completely. The back end of the cutout will be very long, almost as long as the base of the stand. I would also like a cutout at the end of the cutout in the front so that the tablet is not blocked when it is inside the cutout.

I'm not worried about complex shapes or anything, just a simple but functional design. I’d also like to have the ability to tweak the width of the cutouts. Let me know if you need any more details!

[Assistant]
Tablet_stand_.scad:
```
//!OpenSCAD

// The tickness ofyour Tablet in mm
Tablet_thickness = 10;
// The stand has adefinedplace wich one do you want:
Version = "both";//[both,right,left]
// The width of the stand
width = 20;

/* [Advanced] */
// The height of the stand (mm)
Height = 20;
// Pay attention to the angle! It must decrease with increasing lengh(mm)
lengh = 100;
// Angle of the flattend end in degrees(mm)
angle = 10;
/* [Hidden] */

if (Version == "both") {
  union(){
    translate([0, (width + 8), 0]){
      difference() {
        linear_extrude( height=Height, twist=0, scale=[1, 1], center=false){
          union(){
            translate([0, (width / 2), 0]){
              circle(r=(width / 2));
            }
            translate([0, 0, 0]){
              square([lengh, width], center=false);
            }
            translate([lengh, (width / 2), 0]){
              circle(r=(width / 2));
            }
          }
        }

        translate([5, 4, 7]){
          rotate([0, angle, 0]){
            cube([Tablet_thickness, (width - 4), 50], center=false);
          }
        }
        translate([30, 0, Height]){
          rotate([0, angle, 0]){
            cube([100, 100, 100], center=false);
          }
        }
      }
    }
    difference() {
      linear_extrude( height=Height, twist=0, scale=[1, 1], center=false){
        union(){
          translate([0, (width / 2), 0]){
            circle(r=(width / 2));
          }
          translate([0, 0, 0]){
            square([lengh, width], center=false);
          }
          translate([lengh, (width / 2), 0]){
            circle(r=(width / 2));
          }
        }
      }

      translate([5, 0, 7]){
        rotate([0, angle, 0]){
          cube([Tablet_thickness, (width - 4), 50], center=false);
        }
      }
      translate([30, 0, Height]){
        rotate([0, angle, 0]){
          cube([100, 100, 100], center=false);
        }
      }
    }
  }
} else if (Version == "right") {
  translate([0, (width + 8), 0]){
    difference() {
      linear_extrude( height=Height, twist=0, scale=[1, 1], center=false){
        union(){
          translate([0, (width / 2), 0]){
            circle(r=(width / 2));
          }
          translate([0, 0, 0]){
            square([lengh, width], center=false);
          }
          translate([lengh, (width / 2), 0]){
            circle(r=(width / 2));
          }
        }
      }

      translate([5, 4, 7]){
        rotate([0, angle, 0]){
          cube([Tablet_thickness, (width - 4), 50], center=false);
        }
      }
      translate([30, 0, Height]){
        rotate([0, angle, 0]){
          cube([100, 100, 100], center=false);
        }
      }
    }
  }
} else {
  difference() {
    linear_extrude( height=Height, twist=0, scale=[1, 1], center=false){
      union(){
        translate([0, (width / 2), 0]){
          circle(r=(width / 2));
        }
        translate([0, 0, 0]){
          square([lengh, width], center=false);
        }
        translate([lengh, (width / 2), 0]){
          circle(r=(width / 2));
        }
      }
    }

    translate([5, 0, 7]){
      rotate([0, angle, 0]){
        cube([Tablet_thickness, (width - 4), 50], center=false);
      }
    }
    translate([30, 0, Height]){
      rotate([0, angle, 0]){
        cube([100, 100, 100], center=false);
      }
    }
  }
}

```


[User]
Hey, I'm trying to make some custom storage bins for my Harbor Freight parts cases. I've got the medium-sized ones, and the existing bins are just... not ideal. I want to be able to generate bins with custom sizes, subdivisions, and wall thicknesses. I'd also like to be able to stack them in the case, which means being able to specify that a bin is the 'top' of a stack, and to specify its height as a fraction of the standard bin height.

Specifically, I want to be able to control:

*   **Box Size:** This should be in "units" of the standard small HF bin size. So, a `[1, 1]` is a small bin, a `[2, 1]` is a medium one, and `[2, 2]` would be a large bin. I also need to be able to control the z-height, so `[2, 2, 0.5]` would be half the height of a regular `[2, 2]` bin.
*   **Subdivisions:** I need to be able to divide the bin into multiple compartments, like `[3, 2]` for 3 compartments along the length and 2 along the width.
*   **Wall Thickness:**  I'm going to be printing these, so I need to be able to adjust the wall thickness to suit my printer setup.
*   **Lip Height:**  I want a thicker lip at the top of the bins to make them more rigid.
*   **Is Top:** This should be a boolean setting to indicate if this is the top box in a stack. If it's not, then it shouldn't have the extra lip or slightly thicker top wall.

I'd like the design to be parametric, so I can easily generate different bins by changing these parameters. The design should include the rounded corners and the feet that allow it to sit properly in the case.

I've got a few ideas for print settings I plan to use, and I'd like to be able to tweak the lip size and wall thickness easily for each. I'll be using a variety of nozzle sizes, from 0.25mm up to 0.4mm, and layer heights, so being able to easily specify the wall thickness is important.

Could you generate an OpenSCAD file that lets me do all of this? I'm not sure what libraries would be best, so feel free to use whatever you think works.

[Assistant]
HF_Storage_Bin.scad:
```
/**
 * Harbor Freight Small Parts Storage Tray Bins
 *
 * Insipired by:
 *     https://www.thingiverse.com/thing:569241
 *     https://www.thingiverse.com/thing:671740
 *
 * You can use this as a box generator. Woohoo. Fun.
 *
 * I'm including many STLs for boxes I've generated and use.
 * But of course you can use this to generate custom boxes, too. Without having to learn a CAD tool. :-)
 *
 * I've made the module take a couple of parameters.
 *    wall_thickness - let's you control the wall thickness, so you can optimize STLs for your printer nozzle and layer height.
 *    subdivisions = [by length, by width] Lets you define a number of 'buckets' to put in each tray. A normal tray will have 1 bucket, which translates to [1, 1]. If you wanted 3 buckets along the length, and two rows of them, [3, 2] is what you want.
 *    box_size = [length , width] - Lets you define the size of the box in units it occupies in the storage system! A 'small' box is a [1, 1]. The HF kit comes with [1,1], [2, 1], and [2, 2] sizes.
*/

/** -- Basic Single "bucket" (no sub-divisions) trays -- */

// Your basic 'small' tray.
//hf_tray();

// A 'medium' tray
//hf_tray(box_size = [1, 2]);

// A 'large' tray
//hf_tray(box_size = [2, 2]);

// A tray size you can't even get at HF.
//hf_tray(box_size = [3, 3]);

/** -- Subdivisions! -- */

// A 'small' tray with sub-divisions (3 along the length, 2 along the width).
//hf_tray(subdivisions = [3, 2]);

// A Medium tray with 6 slots to put things like through-hole resistor tape reels in.
//hf_tray(box_size = [2, 2], subdivisions = [6, 1]);

/** -- Wall Thickness! -- */
/* Wall thickness can be optimized to give your slicing
    software something really peaceful to work with. It can
    speed up print times, improve print quality, etc.

    I've tested a few of these configurations with Slic3r using
    0.25 and 0.4 nozzles printing nylon trimmer string.
*/

// Printing with a 0.25 nozzle, at 0.10mm / layer, 3 perimeters.
//hf_tray(subdivisions = [1, 1], wall_thickness = 0.71);

// Printing with a 0.25 nozzle, at 0.20mm / layer, 2 perimeters.
//hf_tray(subdivisions = [2, 2], wall_thickness = 0.66);

// Printing with a 0.4 nozzle, at 0.10mm / layer, 2 perimeters.
//hf_tray(subdivisions = [2, 2], wall_thickness = .88, lip_height = 1.5);

/** -- lip_height! -- */
/* For more robust / ridgid boxes along the top edge, increase the lip height.
    The HF trays tend to have a 0.75mm lip, a consequence of the injection
    molding process with polypropylene. I found that using the thin walls above
    things were a bit too flimsey at the top edge for my liking, and a slightly taller
    lip worked well to stiffen up the nylon.
*/

//hf_tray(box_size = [2, 2],
//            subdivisions = [6, 1],
//            wall_thickness = 0.88,
//            lip_height = 1.5);

/** -- Stacking Fractional height units!!! -- */
/* To really make the most of the storage space, set a box_size with a fractional 'z' height,
    make sure you make the lower boxes is_top = false
*/

// A tray that's one of the lower two in a stack of 3.
//hf_tray(box_size = [2, 2, (1/2)],
//            subdivisions = [4, 2],
//            wall_thickness = 0.86,
//            lip_height = 1.5,
//            is_top = true);

// A tray that's the top box in a stack of 3.
//hf_tray(box_size = [2, 2, (1/3)],
//            subdivisions = [6, 1],
//            wall_thickness = 0.88,
//            lip_height = 1.5,
//            is_top = true);

/** Customizer Support **/

/* [Box Dimensions] */
// Number of units wide a box is.
box_width = 1;
// Number of units long a box is.
box_length = 1;

// Box Depth how tall the box is (for stacking).
box_depth = 1; // [1:1, 0.5:1/2, 0.33333:1/3, 0.25:1/4, 0.75:3/4, 0.66666:2/3]
// Is the box the top box in the stack?
top_of_stack = 1; // [1:Yes, 0:No]

// How many subdivisions along the width of the box.
subdivisions_wide = 1;
// How many subdivisions along the length of the box.
subdivisions_long = 1;

/* [Print Tweaks] */
// Specify this based on your print settings.
wall_thickness = 0.86;
// The height of the wider reinforcing lip at the top of the box.
lip_height = 0.75;

/* [Hidden] */
$fn = 64;

hf_tray(box_size = [box_width, box_length, box_depth],
            subdivisions = [subdivisions_wide, subdivisions_long],
            wall_thickness = wall_thickness,
            lip_height = lip_height,
            is_top = (top_of_stack == 1));

module hf_tray(box_size = [1, 1], subdivisions = [1, 1], wall_thickness = 0.8, lip_height = 0.75, is_top = true) {
    // Things I measured from the PP bins that came with my storage boxes...
    lip = .5;
    corner_radius = 2.5;
    taper = 1;
    foot_height = 2.5;

    // Size of a 'small' unit in the storage system.
    unit_length = 54.5 * box_size[0];
    unit_width = 39.5 * box_size[1] ;
    unit_height = (46.5 * (len(box_size) < 3 ? 1 : box_size[2])) +
                         (len(box_size) < 3 || box_size[2] == 1 ? 0 : box_size[2] * (corner_radius + wall_thickness));

    x_div = subdivisions[0];
    y_div = subdivisions[1];

    // Do a bunch of boundary calculations up-front, so we don't have to keep doing math all over the place.

    // Top lip x and y
    top_lip_length = unit_length - (corner_radius * 2);
    top_lip_width = unit_width - (corner_radius * 2);

    // Top x and y
    top_length = top_lip_length - (lip * 2);
    top_width = top_lip_width - (lip * 2);

    top_inside_length = top_length - (wall_thickness * 2);
    top_inside_width = top_width - (wall_thickness * 2);

    // Bottom x and y
    bottom_length = top_length - (taper * 2);
    bottom_width = top_width - (taper * 2);

    bottom_inside_length = bottom_length - (wall_thickness * 2);
    bottom_inside_width = bottom_width - (wall_thickness * 2);

    // Flip it right-side up.
    translate([0, 0, unit_height + foot_height]) rotate([180, 0, 0])

    // Union everything.
    union() {
        // Subtract the 'inside' void'
        difference() {
            // Main shell.
            union () {
                // top lip.
                minkowski() {
                    translate([-top_lip_length / 2, -top_lip_width / 2, 0]) cube([top_lip_length, top_lip_width, lip_height / 2]);
                    cylinder(r = corner_radius, h = lip_height / 2);
                }

                // Taperd Body
                minkowski() {
                    // Hull the top and bottom for a proper taper.
                    hull() {
                        // top
                        translate([-top_length / 2, -top_width / 2, lip_height]) cube([top_length, top_width, 1]);
                        // bottom
                        translate([-bottom_length / 2, -bottom_width / 2, unit_height - corner_radius - 1]) cube([bottom_length, bottom_width, 1]);
                    }
                    // Minkowski a sphere around it.
                    sphere( r = corner_radius);
                }
            }
            // Cut the bottom of the body flush.
            // (removes minkowski round-over at the 'top' of the bin)
            translate([-unit_length / 2, -unit_width / 2, -corner_radius * 2]) cube([unit_length, unit_width, corner_radius * 2]);

            // Produce a 'positive' to remove from the main cavity. Think of it like a press die.
            difference() {
                // Tapered body main cavity.
                minkowski() {
                    // Hull the top and bottom for a proper taper.
                    hull() {
                        // top
                        translate([-top_length / 2, -top_width / 2, 0]) cube([top_length, top_width, 1]);
                        // bottom
                        translate([-bottom_length / 2, -bottom_width / 2, unit_height - corner_radius - wall_thickness - 1]) cube([bottom_length, bottom_width, 1]);
                    }
                    // Minkowski a sphere around it.
                    sphere( r = corner_radius - wall_thickness);
                }

                // Now that there's a positive shape for being pushed into the tray to form the inside,
                // remove any divider walls from the positive.
                if (x_div > 1 || y_div > 1) {
                    difference() {
                        union() {
                            if (x_div > 1) {
                                for ( xwall = [1 : x_div - 1] ) {
                                    translate([-top_length / 2 - (wall_thickness / 2) - corner_radius + (xwall * ((top_length + 2 * corner_radius) / x_div)),
                                                    -top_width / 2 - corner_radius,
                                                    0])
                                    if (is_top) {
                                        cube([wall_thickness, top_width + (2 * corner_radius), unit_height]);
                                    } else {
                                        translate([0, 0, foot_height + wall_thickness])
                                        cube([wall_thickness, top_width + (2 * corner_radius), unit_height]);
                                    }
                                }
                            }

                            if (y_div > 1) {
                                for (ywall = [1 : y_div - 1]) {
                                    translate([-top_inside_length / 2 - corner_radius,
                                                    -(top_inside_width / 2) - (wall_thickness / 2) - corner_radius + (ywall * ((top_inside_width + 2 * corner_radius) / y_div)),
                                                    0])
                                    if (is_top) {
                                        cube([top_inside_length + (2 * corner_radius), wall_thickness, unit_height]);
                                    } else {
                                        translate([0, 0, foot_height + wall_thickness])
                                        cube([top_inside_length + (2 * corner_radius), wall_thickness, unit_height]);
                                    }
                                }
                            }
                        }

                        // If we have divider walls, cut reliefs around the outside edge.
                        translate([-top_inside_length / 2 - corner_radius, -top_inside_width / 2 - corner_radius, 0])
                            rotate([-90, 0, 0])
                                cylinder(r = 3.5, h = top_inside_width + 2 * corner_radius);

                        translate([top_inside_length / 2 + corner_radius, -top_inside_width / 2 - corner_radius, 0])
                            rotate([-90, 0, 0])
                                cylinder(r = 3.5, h = top_inside_width + 2 * corner_radius);

                        translate([-top_inside_length / 2 - corner_radius, -top_inside_width / 2 - corner_radius, 0])
                            rotate([0, 90, 0])
                                cylinder(r = 3.5, h = top_inside_length + 2 * corner_radius);

                        translate([-top_inside_length / 2 - corner_radius, top_inside_width / 2 + corner_radius, 0])
                            rotate([0, 90, 0])
                                cylinder(r = 3.5, h = top_inside_length + 2 * corner_radius);
                    }
                }
            }
        }

        // Add the feet.
        foot(bottom_length = bottom_length, bottom_width = bottom_width, unit_height = unit_height, corner_radius = corner_radius, foot_height = foot_height);
        mirror([1, 0, 0]) foot(bottom_length = bottom_length, bottom_width = bottom_width, unit_height = unit_height, corner_radius = corner_radius, foot_height = foot_height);
        mirror([0, 1, 0]) foot(bottom_length = bottom_length, bottom_width = bottom_width, unit_height = unit_height, corner_radius = corner_radius, foot_height = foot_height);
        rotate([0, 0, 180]) foot(bottom_length = bottom_length, bottom_width = bottom_width, unit_height = unit_height, corner_radius = corner_radius, foot_height = foot_height);
    }
}

module foot(bottom_length = 0, bottom_width = 0, unit_height = 0, corner_radius = 2.5, foot_height = 2.5) {
    translate([-bottom_length / 2, -bottom_width / 2, unit_height - corner_radius]) {
        rotate([0, 0, 45])
        difference() {
            cylinder(r = corner_radius, h = foot_height + corner_radius);
            translate([0, -corner_radius, 0]) cube([corner_radius, 2 * corner_radius, foot_height + corner_radius]);
            sphere(r = corner_radius);
        }
    }
}

```