[User]
Hey, I'm looking to get some OpenSCAD code generated for a landing gear door, specifically for a retractable setup on a model aircraft. I've got some specific dimensions and features in mind, and I'd like it to be parametric so I can adjust it later if needed.

The basic door should be a flat-ish rectangle with a rounded cutout for the wheel. I need it to wrap around the landing gear strut, and I want to include clip features to attach it to the strut, and also a strengthening tab that extends up above the strut. Here are the key parameters:

*   **Door Overlap (margin):** The door should extend beyond the strut and wheel by a certain amount, let's start with 1.5mm.
*   **Door Wall Thickness (wall):** The main part of the door should be 1.2mm thick.
*   **Strut Diameter (leg\_dia):** The strut we'll be attaching to is 9.2mm in diameter.
*   **Strut Length (leg\_len):** The distance from the top of the strut to the center of the wheel is 86.0mm.
*   **Wheel Diameter (wheel\_dia):** The wheel is 55.0mm in diameter.
*   **Extra Tab Length (leg\_extra):** There should be an additional tab extending above the strut by 5.0mm.
*   **Extra Tab Width (leg\_extra\_width):** The tab should have a width of 11.4mm.
*   **Extra Tab Thickness (leg\_extra\_wall):** The tab should be 2.5mm thick.
*   **Clip Wall Thickness (cwall):** The clips that attach to the strut should have a wall thickness of 2.5mm.
*   **Clip Flex Size (clip\_size):** The clips should have a small flex area, which I want to be a relative size between 0 and 0.5. Let's go with 0.25 to start.
*  **Distance from Door Surface to Strut Center (surface\_to\_c):** The distance from the outside of the door to the center of the strut should be 7.9mm.
*   **Wheel Spring Travel (sprung\_len):** There should be an oval-ish cutout that represents a spring-loaded travel amount of the wheel. That length should be 17.8mm.
*   **Wheel Axle Diameter (axle\_dia):** The wheel axle is 3.5mm in diameter, and it should create holes through the door where the axle would sit in the retracted position and when the wheel is extended.

I'd like to ensure that the design incorporates some internal strengthening ribs, specifically 2 of them, that will extend from the edges of the wheel cutout towards the top of the leg. These should be on the inside of the door, and should have a thickness equal to the "wall" parameter. I think it'd be useful to add a very small offset (d) when calculating intersections, that way it's less likely to cause rendering issues.

Can you generate the OpenSCAD code for me? I don't need any additional libraries, just the plain SCAD file.

[Assistant]
rc_landing_wheel_door.scad:
```
//
//  Door for retractable landing wheel (in wing)
//
//  Design by Egil Kvaleberg, 31 January 2015
//

// door extra overlap around leg and wheels
margin = 1.5;

// main door wall thickness
wall = 1.2;

// diameter of strut leg
leg_dia = 9.2;
// distance from top of leg to wheel centre
leg_len = 86.0;

// diameter of wheel
wheel_dia = 55.0;

// extra tab above top of leg, 0 if none
leg_extra = 5.0;
// width of extra tab, also decides width of clips
leg_extra_width = 11.4;
// wall thickness of extra tab
leg_extra_wall = 2.5;

// wall thickness of clips that fastens door to leg
cwall = 2.5;

// relative size of leg clip flex section, from 0.0 to 0.5
clip_size = 0.25;

// distance from surface of door to center of leg
surface_to_c = 7.9;

// length of wheel spring action
sprung_len = 17.8;

// diameter of wheel axle, 0 if it does not protrude through door
axle_dia = 3.5;

d = 1*0.01;

module clip(is_top) {
	rotate ([90, 0, 0]) difference () {
		union () {
			translate([-leg_extra_width/2, 0, -cwall/2]) cube([leg_extra_width, surface_to_c + clip_size*leg_dia, cwall]);
			intersection () { // extra rim
				union () {
					translate([0, surface_to_c, cwall/2]) cylinder(r1=leg_dia/2+wall, r2=leg_dia/2+wall/2, h=wall);
					if (!is_top) translate([0, surface_to_c, -cwall/2-wall]) cylinder(r2=leg_dia/2+wall, r1=leg_dia/2+wall/2, h=wall);
				}
				translate([-leg_extra_width/2, 0, -cwall/2-wall-d]) cube([leg_extra_width, surface_to_c + clip_size*leg_dia, cwall+2*wall+2*d]);
			}
		}
		translate([0, surface_to_c, -cwall/2-wall-d]) cylinder(r=leg_dia/2, h=cwall+2*wall+2*d, $fn=40);
	}
}

module cover() {
	difference () {
		union () {
			translate([-leg_dia/2 - margin, 0, 0]) cube([2*margin+leg_dia, leg_len, wall]);
			translate([-leg_extra_width/2, leg_len, 0]) cube([leg_extra_width, leg_extra, leg_extra_wall]);

			// 2 strengthening bars
			translate([leg_dia/2 - wall, -wheel_dia/2 + sprung_len, 0]) cube([wall, leg_len + wheel_dia/2-sprung_len, surface_to_c-leg_dia/2]);
			translate([-leg_dia/2, -wheel_dia/2 + sprung_len, 0]) cube([wall, leg_len + wheel_dia/2-sprung_len, surface_to_c-leg_dia/2]);
			intersection () {
				cylinder(r=wheel_dia/2 + margin, h=wall, $fn=40);
				translate([-wheel_dia/2 - margin -d, sprung_len-wheel_dia/2, -d]) cube([2*margin+wheel_dia+2*d, 2*margin+wheel_dia, wall+2*d]);
			}
		}
		hull () {
			translate ([0,0,-d]) cylinder(r=axle_dia/2, h=wall+2*d, $fn=20);
			translate ([0,sprung_len,-d]) cylinder(r=axle_dia/2, h=wall+2*d, $fn=20);
		}
	}
}

cover();
translate ([0, leg_len-cwall/2, 0]) clip(true);
translate ([0, wheel_dia/2+cwall/2, 0]) clip(false);
translate ([0, (leg_len+wheel_dia/2)/2, 0]) clip(false);

```


[User]
Hey, I'm looking to design a spool holder for my 3D printer, and I want it to be parametric so I can easily adjust it for different spool sizes or printer setups in the future.

Basically, it's going to be two mirrored pieces, each attaching to the printer frame with a couple of screws. The basic shape involves a flat base with an angled arm extending out to support the spool. I've got some specific dimensions and considerations for this:

*   **Base:** Each side piece will start with a base that has two different height levels. There's a lower section and then a higher section offset vertically. They'll need to be joined so it looks like the lower section is directly beneath the higher.
*   **Thickness:** The whole thing should have a consistent thickness, let's call this `grossura_Da_Peca`, and I can specify that later.
*   **Lower Base Height:** I'll also need to define the height for that lower portion of the base: `altura_Do_Apoio_Baixo`.
*   **Upper Base Height:** Same thing, but for the higher section: `altura_Do_Apoio_Alto`.
*   **Upper Base Thickness:** This is the thickness of the connection between the two base levels: `grossura_Da_Barra_Superior`.
*   **Base Depth:** The depth of the base will be the same for both levels. Let's call this `profundudade_Maxima_Da_Barra_Superior`.
*   **Horizontal Offset:** The horizontal length of the base, from the start to where it connects to the angled arm, will be different for the base's two heights. I need to be able to define this length for the bottom part of the base,  `distancia_Inferior_Reta`, and for the top part, `distancia_Superior_Reta`
*   **Angled Support Arm:** An angled arm will extend upwards from the outer edge of the base.
*  **Arm Length:** The length of this arm from end to end will be `tamanho_Da_Aste_Que_Sobe`.
*  **Hole For Mounting:** The angled arm will have a circular hole at the end that can be used with a screw to affix the spool. The diameter will be defined with `raio_Do_Furo` and there should be an extra bit of material around it with sizes `borda_Do_Furo_Pra_Fora` and `borda_Do_Furo_Pra_Cima` that will make it have a small lip on the outside.
*   **Mounting Tabs:** There also needs to be a small, tab at the back edge of both the lower and upper base sections.
*  **Tab Dimensions:** Both tabs will have the length `tamanho_Da_Lingueta`, the thickness `grossura_Da_Lingueta`, and a mounting hole in each defined by `raio_Do_Furo_Da_Lingueta`. The holes in the tabs need to cut all the way through the mounting tabs, as well as the main body.
*   **Mirroring:** I'll need to be able to mirror the entire part on the Y-axis to get the other side, so a simple boolean toggle for a "left" side and "right" side would be perfect.

I think that covers all the important details. I'm mainly looking for an OpenSCAD design where I can easily tweak all of these parameters to get the right fit. Thanks!

[Assistant]
SuporteParaORolo.scad:
```
grossura_Da_Peca = 6;
grossura_Da_Barra_Superior = 7.7;
altura_Do_Apoio_Alto = 10;
altura_Do_Apoio_Baixo = 15;
profundudade_Maxima_Da_Barra_Superior = 26;
distancia_Superior_Reta = 50;
distancia_Inferior_Reta = 80;
tamanho_Da_Aste_Que_Sobe = 110;
raio_Do_Furo = 4;
borda_Do_Furo_Pra_Fora = 10;
borda_Do_Furo_Pra_Cima = 10;
tamanho_Da_Lingueta = 10;
grossura_Da_Lingueta = 2;
raio_Do_Furo_Da_Lingueta = 1.5;
esquerda = false; // [true, false]

alturaTotal = altura_Do_Apoio_Baixo + altura_Do_Apoio_Alto + grossura_Da_Barra_Superior;
alturaDaAsteQueSobe = sqrt(alturaTotal*alturaTotal + (distancia_Inferior_Reta-distancia_Superior_Reta)*(distancia_Inferior_Reta-distancia_Superior_Reta));
anguloDaAste = acos(alturaTotal/alturaDaAsteQueSobe);

if(esquerda) {
	mirror([0,1,0]) peca();
} else {
	peca();
}

module peca(){
difference(){
union() {
	cube([profundudade_Maxima_Da_Barra_Superior, altura_Do_Apoio_Baixo,grossura_Da_Peca]);

	translate([0,0,grossura_Da_Peca])
		difference() {
			cube([grossura_Da_Lingueta, altura_Do_Apoio_Baixo, tamanho_Da_Lingueta]);
			translate ([-0.1, altura_Do_Apoio_Baixo/2, tamanho_Da_Lingueta/2])
				rotate ([0,90,0])
					cylinder (h = grossura_Da_Peca*2, r=raio_Do_Furo_Da_Lingueta, $fn=30);
		}

	translate([0,(altura_Do_Apoio_Baixo+grossura_Da_Barra_Superior),0])
		cube([profundudade_Maxima_Da_Barra_Superior,altura_Do_Apoio_Alto,grossura_Da_Peca]);
	translate([0,(altura_Do_Apoio_Baixo+grossura_Da_Barra_Superior),grossura_Da_Peca])
		difference () {
			cube([profundudade_Maxima_Da_Barra_Superior,grossura_Da_Lingueta,tamanho_Da_Lingueta]);
			translate ([profundudade_Maxima_Da_Barra_Superior/2, -0.1, tamanho_Da_Lingueta/2])
				rotate ([-90,0,0])
					cylinder (h = grossura_Da_Peca*2, r=raio_Do_Furo_Da_Lingueta, $fn=30);
		}

		difference() {translate([profundudade_Maxima_Da_Barra_Superior,0,0])
			cube([distancia_Inferior_Reta-profundudade_Maxima_Da_Barra_Superior,altura_Do_Apoio_Baixo+grossura_Da_Barra_Superior+altura_Do_Apoio_Alto,grossura_Da_Peca]);
			translate([profundudade_Maxima_Da_Barra_Superior,altura_Do_Apoio_Baixo+grossura_Da_Barra_Superior/2,-0.1])
				cylinder (h = grossura_Da_Peca*2, r=grossura_Da_Barra_Superior/2, $fn=30);
		}

	translate([distancia_Inferior_Reta,0,0])
		rotate([0,0,anguloDaAste])
			difference() {
				union() {
					cube([tamanho_Da_Aste_Que_Sobe,alturaDaAsteQueSobe,grossura_Da_Peca]);
					translate([tamanho_Da_Aste_Que_Sobe-borda_Do_Furo_Pra_Fora,alturaDaAsteQueSobe-borda_Do_Furo_Pra_Cima,0])
						cylinder (h = grossura_Da_Peca*1.5, r=raio_Do_Furo*3, $fn=30);
				}
				translate([tamanho_Da_Aste_Que_Sobe-borda_Do_Furo_Pra_Fora,alturaDaAsteQueSobe-borda_Do_Furo_Pra_Cima,-grossura_Da_Peca])
					rotate([0,0,90-anguloDaAste])
						union () {
							%cylinder (h = 5, r=75+55/2, $fn=30);
							cylinder (h = grossura_Da_Peca*3, r=raio_Do_Furo);
							translate([0,-raio_Do_Furo,0])
								cube([raio_Do_Furo*10,raio_Do_Furo*2,grossura_Da_Peca*3]);
						}
			}
}

translate([distancia_Superior_Reta,0,0])
	rotate([0,0,anguloDaAste]){
		translate([0,-100,-0.1]){
			cube([200,100,grossura_Da_Peca*3]);
		}
	}

}
}
```


[User]
I'm looking to design a case for my Arduino Mega and Ramps 1.4 board. The case should be a parametric design in OpenSCAD, so I can easily adjust the dimensions later if I need to. I'd like it to have a few specific features:

*   **Main Body:** A box-like structure with a certain thickness, height, width, and length. I need to specify these dimensions as parameters.
*   **Mounting:** The case should be designed to mount the Arduino board directly, without screws. This is done using two support structures that grab the board, and the cover is then held in place. One of those supports needs to be near the top (or what we'll call the 'top' for this specific design), and another near the bottom.
*   **USB and Power Access:** It should have cutouts for the USB port on one side and the power jack on another side of the Arduino board, and I'll need to specify their positions and sizes using parameters. The locations and sizes should be based on the physical dimensions of a standard Arduino Mega and RAMPS 1.4 combo.
*   **Cable Hole:** A hole for the cables to go through, preferably at one end of the box (what we'll call the back side in this design). This should be a circular hole with its radius and position being parameters.
*   **Ventilation:** A grid of holes on the front, it should take up most of the space available on the side. This grid needs to have a certain height and width, and also a space between each individual hole should be settable using parameters.

I'd prefer the design to be adaptable and easy to customize. I don't want to use any specific external library, like MCAD, BOSL, or BOLTS. Let me know if you need more specifics, but I think those are the main points. I am picturing the Ramps board fixed to the right side of the printer. If it ends up on the opposite side it will have to be mirrored.

[Assistant]
TampaArduinoFull.scad:
```
thickness = 3;
height = 170;
width = 85;
length = 70;

sideProtectionHeight = 20;

usbHoleSize = 14;
usbSideDistance = 16;
usbHeight = length - usbHoleSize - 2;

powerLength = 20;
powerWidth = 26;
powerOppositeSideDistance = width - powerWidth - 15;
powerLengthDistance = length - powerLength - 13;

cablesRadius = 15;
cablesHeightDistance = 70;

fixationUpperDistance = 10;
fixationLengthDistance = usbHoleSize+usbSideDistance;
fixationWidth = 10;
fixationHeight = length - 14;
fixationThickness = thickness * 1.5;
fixationSupportStep = 15;

fixationBottomUpperDistance = fixationUpperDistance + 110;
fixationBottomLengthDistance = powerOppositeSideDistance+powerWidth-fixationWidth;
fixationBottomHeight = length - 26;
fixationBottomSupportHeight = fixationBottomHeight * .8;
fixationBottomSupportLength = height - fixationThickness*3 - fixationBottomUpperDistance;
fixationBottomSupportAngle = 313;

ventilationHoleHeight = 95;
ventilationHoleWidth = width * .8;
ventilationHoleHeightDistance = fixationUpperDistance + 10;
ventilationHoleWidthDistance = width * .1;

ventilationStep = 3;

union() {
	//Main box
	difference() {
		cube([height, width, length]);
		translate([thickness,thickness,thickness])
			cube([height+thickness, width+thickness, length+thickness]);

		//USB hole
		translate([0, usbSideDistance, usbHeight])
			cube([thickness*2, usbHoleSize, usbHoleSize	]);

		//Power Source hole
		translate([0, powerOppositeSideDistance, powerLengthDistance])
			cube([thickness*2, powerWidth, powerLength]);

		//Cables hole
		translate([cablesHeightDistance, 0, length])
			rotate([270,0,0])
				cylinder(h = thickness*2, r = cablesRadius);

		//Ventilation hole
		translate([ventilationHoleHeightDistance, ventilationHoleWidthDistance, 0])
			cube([ventilationHoleHeight, ventilationHoleWidth, thickness*2]);

	}

	//Upper fixation
	translate([fixationUpperDistance, fixationLengthDistance, 0])
		cube([fixationThickness, fixationWidth, fixationHeight]);
	translate([fixationUpperDistance+fixationThickness, fixationLengthDistance, fixationHeight-thickness])
		rotate([270,0,0])
			cylinder(h = fixationWidth, r = thickness);
	for (stepSupport = [thickness+fixationSupportStep:fixationSupportStep:fixationHeight-fixationSupportStep*2]) 		{
			translate([thickness, fixationLengthDistance, stepSupport])
				cube([fixationUpperDistance, fixationWidth, thickness]);
	}

	//Bottom fixation
	translate([fixationBottomUpperDistance, fixationBottomLengthDistance, 0])
		cube([fixationThickness, fixationWidth, fixationBottomHeight]);
	translate([fixationBottomUpperDistance, fixationBottomLengthDistance, fixationBottomHeight-thickness])
		rotate([270,0,0])
			cylinder(h = fixationWidth, r = thickness);
	difference() {
		translate([fixationBottomUpperDistance+fixationThickness, fixationBottomLengthDistance+(fixationWidth/2-thickness/4), 0])
			cube([fixationBottomSupportLength, thickness/2, fixationBottomSupportHeight]);

		translate([fixationBottomUpperDistance+fixationThickness+fixationBottomSupportLength, fixationBottomLengthDistance+(fixationWidth/2-thickness/2), 0])
			rotate([0, fixationBottomSupportAngle, 0])
				cube([fixationBottomSupportLength, fixationThickness, fixationBottomSupportHeight*2]);
	}

	//Side Protection
	translate([0, width-thickness, 0])
		cube([height, thickness, sideProtectionHeight]);

	//Bottom Protection
	translate([height-thickness, 0, 0])
		cube([thickness, width, sideProtectionHeight]);

	//Ventilation grid
	for (step = [fixationUpperDistance:ventilationStep:ventilationHoleHeightDistance+ventilationHoleHeight]) 		{
		if ((step%2) == 0) {
			translate([fixationUpperDistance+step, ventilationHoleWidthDistance, thickness/2])
				rotate([270,0,0])
					cylinder(h = ventilationHoleWidth, r = thickness/2);
		}
	}

}
```


[User]
I need some help designing a customizable push button generator in OpenSCAD. I'd like it to be flexible enough to create a range of different button styles.

Here's what I'm looking for:

**Button Shape:**

*   The primary shape should be selectable between round, square, and oval.
*   For round buttons, I need a parameter for the outside diameter.
*   For square and oval buttons, I need separate parameters for the X and Y dimensions.
*   All buttons should have a parameter for the overall length (thickness).
*   I want to be able to add a bevel to the top edge of all the buttons, with a parameter for the bevel amount (a single value).

**Edge Styling (for Square Buttons):**

*   For square buttons, I need options to style the edges. Specifically, these options should be selectable as:
    *   Rounded edges, where I can set a radius for the round
    *   Beveled edges, where I can specify an amount for the bevel
    *   Square edges, where the edge is just a 90 degree corner.
*   For bevels, I need to be able to set a distance along the X and Y axis, which are equal. This is easier for me to understand than specifying the diagonal face length.

**Shaft Hole:**

*   The shaft hole needs to be selectable as either round or square.
*   I need a parameter for the shaft length (the depth of the hole) inside the button. The top of the hole should be vaulted to allow support-free printing.
*   For a round shaft, I need a parameter for the diameter.
*   For a square shaft, I need a parameter for the side length.
*   I also need an "oversize" parameter, to adjust the shaft hole size for printer accuracy. This should be added to the shaft hole size for both round and square holes.
*   For square holes, I need a "keyhole" feature in each corner to avoid rounding of the corners, with a parameter for the diameter of the keyhole. The keyhole should be circular in cross section.

**Visualization:**

*   I'd like a global option to either show the complete button or a cross-section. This is primarily for debugging, so not critical but still useful.

I'm hoping the final design will be parametric, meaning that I can adjust all of these parameters and generate different button variations without modifying the code directly. I am happy to use a single scad file for this. I think I have all the details, so I am ready for the design. Thanks.

[Assistant]
PushButtonMaker1.scad:
```
// Push button generator
// Makes round or square buttons with round or square shaft holes, and bevelled edges
// square holes are keyholed to prevent rounding of internal corners
// holes are vaulted so no support will be needed inside them
// customizer compatible

//defualt is to
// Make replacement buttons for Atlas stove
// button is a round button press fit onto a square 3.3mm shaft
// this is a standard size for "isostat" switches

/* [Global] */
//Visualising
Show="CrossSection"; //[Complete,CrossSection]
//Outside shape of button
ButtonShape="Round"; //[Round,Square,Oval]

/* [Button] */
//Length of Button
L=15;

//Outside Diameter of Round Button
ButtonOD=10.65;

//Rectangular or oval ButtonX
ButtonX=15;
//Rectangular or oval ButtonY
ButtonY=10;

//amount of bevel around top edge of button
TopBevel=1.2;
//Style of the button edge (for square buttons)
EdgeStyle="Round"; //[Radius,Bevel,Square]
//Bevel of bevelled edges. (This is X,Y distance, not the bevel face length)
EdgeBevel=1.2;
//Radius of rounded edges
EdgeR=1.2;

/* [Shaft Hole] */
ShaftShape="Square"; //[Square,Round]
//Length of shaft inside button. Crown of hole is vaulted for support free build
ShaftL=10;
//Side width of square shafts or diameter of round shafts
ShaftW=3.3;
//Oversize in mm for internal holes (diameter). UP printer makes internal holes small. Adjuest this for correct internal size
holeos=0;
//So that square shaft holes don't have rounded corners they must have a keyhole at the corner
ShaftKeyholeD=1.2;

KeyholeR=ShaftKeyholeD/2;

OR=ButtonOD/2;
ShaftI=ShaftW+holeos; //side length or IR
ShaftR=(ShaftW+holeos)/2; //for round shafts

//------

module SqShaft() {
    hull() {
    translate([-ShaftI/2,-ShaftI/2,0])
        cube([ShaftI, ShaftI,ShaftL]);
     translate([0,0,ShaftL+ShaftI/2])
        cylinder(r=0.5,h=0.5);
    }//hull
    KHO=ShaftI/2-KeyholeR/2;
    for (A=[0:3]) {
        rotate([0,0,A*90])
            translate([KHO,KHO,0])
                cylinder(r=KeyholeR, h=ShaftL,$fn=10);
    }//for

}//mod
module RoundShaft() {
    cylinder(r=ShaftR, h=ShaftL, $fn=20);
    translate([0,0,ShaftL])
        cylinder(r1=ShaftR,r2=0.1,h=ShaftR); //vault at top of hole
}//mod

module RoundButton() {
        H1=L-TopBevel;
        hull() {
            cylinder(r=OR, h=H1, $fn=50);
            translate([0,0,H1])
            cylinder(r=OR-TopBevel, h=TopBevel,$fn=50);
        };//hull
}//mod

module SquareButton() {
        H1=L-TopBevel;
        hull() {
            //translate([0,0,H1/2]) cube([ButtonX,ButtonY,H1], center=true);
            for (iX=[1,-1],iY=[1,-1]) {
                    translate([(ButtonX/2-EdgeBevel)*iX,(ButtonY/2-EdgeBevel)*iY,H1/2])
                        if (EdgeStyle=="Bevel") {
                                rotate([0,0,45]) //bevels are made by using edge of these cubes at 45deg
                                    cube([EdgeBevel*sqrt(2),EdgeBevel*sqrt(2),H1],center=true);
                        } else {
                            if (EdgeStyle!="Square") {
                                cylinder(r=EdgeR, h=H1, center=true,$fn=20);
                            } else {
                                cylinder(r=0.1, h=H1, center=true,$fn=20);
                            }//if
                        }//if
                    }//for
            translate([0,0,H1+TopBevel/2])
                 cube([ButtonX-(2*TopBevel),ButtonY-(2*TopBevel),TopBevel], center=true); //bevelled top
        }//hull
}//mod

difference() {
    if (ButtonShape=="Square") {
        SquareButton();
    } else { //round, oval
        RoundButton();
    };
    translate([0,0,-0.1])  {
        if (ShaftShape=="Round") {
            RoundShaft();
        }else{
            SqShaft();
        }//if
        if (Show=="CrossSection") {
            //MM=max(ButtonX,ButtonY);
            rotate([0,0,-125]) cube([100,100,L+1]);
    }//if
}//translate
}//difference
```


[User]
I need an OpenSCAD design for a Raspberry Pi rack. It should be parametric, allowing me to specify the number of Raspberry Pis to stack vertically. I want it to be a simple, functional design.

The basic structure should be a series of stacked "U" shaped modules that hold the Pis. The bottom and top should be a simple flat floor.  I want a parameter, `rack_height`, to control how many Pis can be stacked.

Here are the dimensions to use for the Pi and other components:
*   Raspberry Pi width (`rpi_width`): 57.5 mm
*   Raspberry Pi length (`rpi_length`): 87 mm
*   Vertical spacing between Pis (`u_height`): 23 mm
*   Wall thickness (`wall`): 2 mm
*   Ledge height for Pi support (`ledge`): 2 mm
*   Port height on sides (`port_height`): 11 mm
*   Port length on sides (`port_len`): 61 mm

Each "U" section should have a back wall with a cutout for cables. There should also be port cutouts on the side.

Could you generate the OpenSCAD code for this rack? I think that should be all the info you need.

[Assistant]
raspberry_rack.scad:
```
// preview[view:east, tilt:top]

/* [Global] */
//how many raspis to stack on each other
rack_height=4; //[1:10]

/* [Hidden] */
rpi_width=57.5;
rpi_length=87;
u_height=23;
wall=2;
ledge=2;
port_height=11;
port_len=61;

module rack_floor(){
cube([rpi_width+2*wall,rpi_length+wall,wall]);
}

module one_u(){
 difference(){
	cube([rpi_width+2*wall,rpi_length+wall,u_height]);
 // cut out main area
	translate([wall,-wall,wall])cube([rpi_width,rpi_length,u_height]);
  //cut floor
  translate([wall+ledge,-wall,-wall])cube([rpi_width-2*ledge,rpi_length,3*wall]);

  //back
	translate([wall+1,rpi_length-2*wall,ledge+1])cube([rpi_width-2,5*wall,u_height-1-2*wall]);
  //side ports
  translate([rpi_width,-wall,wall+1])cube([5*wall,port_len,port_height]);
 }
}

module raspi_rack(){
	rack_floor();
	for(i=[1:rack_height]){
		translate([0,0,(i-1)*u_height])one_u();
	}
	//roof
	translate([0,0,rack_height*u_height])rack_floor();
}

//rotate & center
translate([(rack_height*u_height)/2,-(rpi_width+2*wall)/2,rpi_length+wall])rotate([-90,0,90])raspi_rack();

```


[User]
I'm looking to create a parametric design for an ultrasound transducer test frame in OpenSCAD. I've got some ideas but need help actually creating the files and making it parametric. I've got a bit of a complex setup in mind, so it might be good to have it broken up into a few modules or separate files.

Here’s the basic concept:

1.  **Towers:** The core of the system are two towers that hold the transducers at a specific height above a surface. The towers have a main pillar, feet for stability, and a ring at the top that holds the transducer. I'd like to be able to define the *height of the tower*, *the diameter of the transducer holder ring*, and a *wall thickness* for all parts. The tower should have some extra strengthening with a crossbar and gussets where the pillar meets the base. It would be best if the tower foot was also parametric, so the user can specify the *length of the supporting feet*.

2.  **Connector:** This is a small connector piece that holds the transducers inside the ring and provides a way to connect to the pivot or the bar. This connector has the same wall thickness as the main structure and should have a slightly bigger "hole" for mounting.

3.  **Pivot:** One of the towers needs to be able to rotate. For this, I need a pivot mechanism that attaches to the connector. This pivot should include a simple protractor with marked angles, such as -90 to +90 with tick marks every 5 and 15 degrees. It needs to have some mounting holes for the connection to the bar. I think it would be best if the user could specify the *radius of the protractor*.

4.  **Bar:** The bar connects the two towers, and it's what allows the one tower to pivot. One end of the bar connects to the pivot, and the other end attaches to a connector on the fixed tower. The bar should have a hole in it for the rotating axle, and a small hole for observation, for example, to confirm a correct placement of the transducer. I'd like to be able to adjust the *distance between the two towers* using a parameter. I think it would make sense to also parameterize the *width of the bar*.

I would like to keep it reasonably simple. I would appreciate it if you included the `use <MCAD/boxes.scad>` library to draw some helper cubes during the development process.

I hope this all makes sense! Let me know if you need more clarification.

[Assistant]
ultrasound_test_frame.scad:
```
//
// Ultrasound test bench
//
// Design by Egil Kvaleberg, 1 February 2015
//
// Now with some extra strengthening of the tower
//
// Note that X and Z are switched. Sorry about that

variant = "tower"; // [demo, tower, pivot, bar]

// wall thickness
wall = 2.0;
// diameter of transducer
sdia = 16.2;
// height above table
theight = 200.0;
// width of bar
bwidth = 10.0;
// length of supporting feet
fwidth = 70.0;
// distance horisontally
dlen = 200.0;
// tolerance for fit
tol = 0.25;
// radius of protractor
protractor = 40.0;

platform = 1*200.0;
d = 1*0.03;

//color("Green") cube([platform, platform, 0.1], center=true);

module tower() {
	// main pillar
	translate([theight/2, 0, bwidth/2]) cube([theight-sdia-wall, wall, bwidth], center=true);
	translate([theight/2, 0, wall/2]) cube([theight-sdia-wall, bwidth, wall], center=true);

	translate([0, 0, bwidth/2]) difference(){
		union () {
			// feet across
			translate([wall/2, 0, 0]) cube([wall, fwidth, bwidth], center=true);
			translate([bwidth/2/2, 0, -bwidth/2+wall/2]) cube([bwidth/2, fwidth, wall], center=true);
			translate([wall+sdia/4, 0, 0]) cube([sdia/2, bwidth, bwidth], center=true);
		}
		union () {
			translate([wall+(sdia/2-wall)/2, 0, 0]) cube([sdia/2-wall, bwidth-2*wall, 2*d+bwidth], center=true);
		}
	}
	// foot "upwards"
	translate([wall/2, 0, fwidth/4+bwidth/2]) cube([wall, bwidth, fwidth/2], center=true);
	translate([bwidth/2/2, wall/2-bwidth/2, fwidth/4+bwidth/2]) cube([bwidth/2, wall, fwidth/2], center=true);
	translate([bwidth/2/2, bwidth/2-wall/2, fwidth/4+bwidth/2]) cube([bwidth/2, wall, fwidth/2], center=true);
	// ring on top
	translate([theight, 0, 0]) difference () {
		cylinder(r=sdia/2+wall, h=bwidth, $fn=60);
		translate([0, 0, -d]) cylinder(r=sdia/2, h=bwidth+2*d, $fn=60);
	}
}

module connector (len) {
	translate([0, 0, bwidth/2])
			translate([wall+(sdia/2-wall)/2, 0, 0]) cube([sdia/2-wall-2*tol, bwidth-2*wall-2*tol, bwidth+2*tol], center=true);
	translate([bwidth/2, 0, -tol-(bwidth/2)/2]) cube([bwidth, bwidth, bwidth/2], center=true);
	translate([wall/2, 0, -tol-(len-tol)/2]) cube([wall, bwidth, len-tol], center=true);
}

module pivot() {
	connector(1.1*bwidth);
	translate([0, 0, -1.1*bwidth]) rotate([0,90,0]) {
		difference () {
			intersection () {
				cylinder(r = protractor, h=wall, $fn=60);
				translate([protractor/2, 0, wall/2]) cube([protractor, 2*protractor, wall], center=true);
			}
			for (r = [-90:5:90])
			rotate([0, 0, r]) translate([protractor-2.0, 0, -d]) cylinder(r = 1.2, h=wall+2*d, $fn=10);
			for (r = [-90:15:90])
			rotate([0, 0, r]) translate([protractor-5.0, 0, -d]) cylinder(r = 1.2, h=wall+2*d, $fn=10);
		}
	}
	translate([0, 0, -1.1*bwidth]) rotate([0,90,0]) cylinder(r = bwidth/4-tol/2, h=3*wall, $fn=20);
}

module bar() {
	difference () {
		union () {
			connector(dlen-protractor-bwidth*1.1-tol);
			translate([wall+tol/2, 0, protractor-dlen+1.6*bwidth+tol]) cube([wall+tol+wall, bwidth, 1.0*bwidth], center=true);
			translate([wall/2+wall+tol, 0, protractor-dlen-0.4*bwidth]) cube([wall, bwidth, protractor+1*bwidth], center=true);
			translate([wall+tol, 0, 1.1*bwidth-dlen]) rotate([0,90,0]) cylinder(r=bwidth/2, h=wall);
		}
		union () {
			// axle
			translate([0, 0, 1.1*bwidth-dlen]) rotate([0,90,0]) cylinder(r = bwidth/4+tol/2, h=2*wall+tol+d, $fn=20);
			// observation hole
			translate([0, 0, protractor+0.8*bwidth-dlen]) rotate([0,90,0]) cylinder(r = bwidth/4, h=2*wall+tol+d, $fn=20);
			translate([0, 0, protractor+0.4*bwidth-dlen]) rotate([0,90,0]) cylinder(r = 1.2, h=2*wall+tol+d, $fn=20);
		}
	}
}

if (variant == "tower") rotate([0, 0, 180+45]) tower();
if (variant == "bar") rotate([0, -90, 45]) bar();
if (variant == "pivot") rotate([0, -90, 0]) pivot();
if (variant == "demo") rotate([0, -90, 0]) {
	tower();
	color("Green") bar();
	rotate([180, 0, 0]) translate([0, 0, dlen]) {
		color("Blue") pivot();
		tower();
	}
}
```


[User]
Hey, I'm looking to make a customizable minion heart figure, kind of like the one I saw on Thingiverse. I have the basic idea, but I need help making it parametric so I can easily change the size and text.

The base of the design is a heart-shaped object that represents a minion holding it (I've got a .stl file, `minion_heart_base.stl`, which you can use as a base). I also want to be able to add text on the front of the heart.  In the example I have, the text is "Marlis".

I need a parametric OpenSCAD file, or set of files, that allows the user to customize the following parameters:

*   **text:** The text to display on the heart (default value should be "LOVE").
*   **text_height:** The height of the text (default value should be 20).
*   **text_thickness:** The thickness of the text (default value should be 10).
*  **base_scale:** A scaling factor for the base minion/heart stl file (default value 1)
*   **text_offset_x:** How much to offset the text on the X axis (default value should be 0).
*   **text_offset_y:** How much to offset the text on the Y axis (default value should be -40).
*   **text_offset_z:** How much to offset the text on the Z axis (default value should be 163).
*   **font_name:** The name of the font to use (default value should be "knewave.dxf").

I'd like to use the `write.scad` library. Also, the text should be centered on the heart by default.

Could you help me generate the OpenSCAD files for this? Thanks!

[Assistant]
minion_heart.scad:
```
use <write/write.scad>
union(){
import("minion_heart_base.stl", convexity=4);

translate([0,-40,163])
write("Marlis",t=10,h=20,center=true, font = "knewave.dxf");
}
```


[User]
Okay, I'm looking to get a battery holder designed in OpenSCAD, and I've got some pretty specific requirements. I want it to be parametric, so I can easily adjust it for different battery sizes and configurations.

Here's the general idea: It'll be a series battery holder, meaning the batteries will be end-to-end. I need to support battery sizes from AAA up to D, and ideally including 168A cells as well. It'd be great if I could specify the number of cells, too. I want to be able to choose whether to include mounting flanges, and their positions, and the size of bolt holes for the flanges. I'd also like to put some custom text on the holder.

For the basic design, the batteries will sit in a cutout in a main body. It will have an endplate on each side to keep the batteries from falling out. I need cutouts for battery clips, with solder flanges on the side and a channel for hookup wire to go to the next battery. Polarity symbols next to each battery would be a very nice touch. There should be a small cutout to help with battery removal.

I want all the dimensions related to the batteries to be based on actual battery specs so I can get close to the right size for each battery. Here's the basic data I want to base it on:

*   **AAA:** Length 44.5mm, Diameter 10.5mm
*   **AA:** Length 50.5mm, Diameter 14.5mm
*   **C:** Length 50mm, Diameter 26.2mm
*   **D:** Length 61.5mm, Diameter 34.2mm
*   **168A:** Length 65.2mm, Diameter 18.6mm

I need a few more specific things:
*   A value to increase the size of the battery cutouts by a small percentage (like 4%)
*   The thickness of the battery clips, mount points, conductor, and end plates.  Also, I will need to specify the dimensions of the battery clips, conductors, solder flanges, and hookup wire channels.

I don't have a need for any specific modules, so please just use OpenSCAD's built-in functions if possible. I'm pretty familiar with OpenSCAD so any design you make I should be able to easily use and modify further, if necessary.

Thanks!

[Assistant]
battery_box_2.0.scad:
```
/*
based almost entirely on Battery Holder by flummer
http://www.thingiverse.com/thing:331394

With thanks to Michael@OZ: https://groups.google.com/forum/#!topic/thingiverse/rTH3Fq_G_5k

CHANGE LOG
  16 March
  * major rewrite
  * simplified many things
  * moved most tasks into subs
  * added custom text

  9 February
  * adjusted overall length
  * adjusted grove to allow removal
  * fixed logic error in hookup wire channel

  7 February
  * added 168A at Thomas' request
  * Made base thicker

  5 February
  * Add customizer option to remove mounting flanges
  * make flange position more precice

  4 February
  * flip/flop cells for simpler wiring
  * baseThick needs to scale with battery diameter

  3 February
  * made base thickness a function of battery diameter

  2 February
  * Cleaned up customizer variables
  * Added and cleaned up comments
  * add option for different sized cells
  * made flanges a paramater
  *

*/

/*[Features]*/

flanges=1; //[0:no flange, 1:add bolt flange]
flangeLocation=15; //[0:100]
flangeMbolt=3; //[1:5]

/*[Hidden]*/
batteryDia=14.5; //temporary battery vars for lookup function
batteryLen=50.5;

/*Add more battery deffinitions here in the following format:

BatteryName=[
    [batteryLen, <Length of battery>],
    [bateryDia, <Diameter of battery>]
];

Battery Deffinitions based on this page:
http://en.wikipedia.org/wiki/List_of_battery_sizes#Cylindrical_cells

*/
AA=[
    [batteryLen, 50.5],
    [batteryDia, 14.5]
];

AAA=[
    [batteryLen, 44.5],
    [batteryDia, 10.5]
];

C=[
    [batteryLen, 50],
    [batteryDia, 26.2]
];

168A=[
      [batteryLen, 65.2],
      [batteryDia, 18.6]
];

D=[
    [batteryLen, 61.5],
    [batteryDia, 34.2]
];

cellList=[AAA, AA, C, D, 168A];

/*[Global]*/
//Number of Cells
cellCount=3; //[1:10]
cellTypeMeta=1; //[0:AAA, 1:AA, 2:C, 3:D, 4:168A]
customText="4.5V";

/*[Battery Clip]*/
clipThick=2; //Thickness of the folded part of the battery clip
clipMount=2; //thickness of mounting portion of clipa
clipDimensions=[1.4, 10.5, 11.6];
conductorDimensions=[1, 5.5, 100];
solderFlangeDim=[7, 5.5, 1.6];
endPlateThick=2; //end plate behind the conductor
wireThick=3; //thickness of hookup wire channels

/*[Hidden]*/
//This has to be AFTER the cell definitions and the cellTypeMeta is defined
pctOvr=1.04; //indrease sizes by this munc
cellType=cellList[cellTypeMeta];
batLen=lookup(batteryLen, cellType);
batRad=(lookup(batteryDia, cellType)/2)*pctOvr;
flangeHoleRad=flangeMbolt/2*pctOvr;

//battery cell
module cell() {
  rotate([0, 90, 0])
    cylinder(r=batRad, h=batLen+clipThick*2, center=true, $fn=100);
}

//polarity symbol
module polarity(symbol=1) {
  if (symbol==1) {
    cube([6, 2, 1], center=true);
    cube([2, 6, 1], center=true);
  }

  if (symbol==-1) {
    cube([2, 6, 1], center=true);
  }
}

module cornerFillet(rad=5, thick=10) {
  difference() {
    cube([thick, rad, rad], center=true);
    rotate([0, 90, 0])
      translate([rad/2, rad/2, 0])
      cylinder(r=rad, h=thick+1, center=true);
  }
}

module solderFlange() {
  union() {
    cube(solderFlangeDim, center=true);
    translate([solderFlangeDim[0]/2, 0, 0 ])
      cylinder(r=solderFlangeDim[1]/2, h=solderFlangeDim[2], $fn=36, center=true);
  }
}

module mountingFlange() {
  translate([0, 0, flangeHoleRad])
  difference() {
    union() {
      cylinder(r=flangeHoleRad*2, h=flangeHoleRad*2, center=true, $fn=36);
      translate([0, flangeHoleRad*2, 0])
        cube([flangeHoleRad*4, flangeHoleRad*4, flangeHoleRad*2], center=true);
    }
    cylinder(r=flangeHoleRad, h=flangeHoleRad*3, center=true, $fn=36);
  }
}

module endPlate(baseThick, batDisplace, baseY) {
  plateX=endPlateThick;
  plateY=batRad*2*cellCount;
  plateZ=baseThick+batDisplace+batRad;
  cornerRad=5;

  //cut off the corners
  difference() {
    translate([0, 0, plateZ/2])
      cube([plateX, plateY, plateZ], center=true);
    translate([0, (plateY/2-cornerRad/2), plateZ-cornerRad/2])
      rotate([-90, 0, 0])
      cornerFillet(rad=cornerRad);
    translate([0, -1*(plateY/2-cornerRad/2), plateZ-cornerRad/2])
      cornerFillet(rad=cornerRad);

  }
}

module mainBody() {
  baseThick=batRad; //Thickness of base
  batDisplace=batRad*2/3; //amount to displace the battery cutout in z axis

  baseX=batLen+2*clipThick+clipMount*2+conductorDimensions[0]*2+endPlateThick*2;
  baseY=batRad*2*cellCount;
  baseZ=baseThick+batDisplace;

  difference() {
    union() {
      //create the base
      translate([0, 0, (baseThick+batDisplace)/2])
        cube([baseX, baseY, baseZ], center=true);

      //create end plates
      for (i=[-1, 1]) {
        translate([i*(baseX/2-endPlateThick/2), 0, 0])
          endPlate(baseThick, batDisplace, baseY);
      }

      //add mounting flanges
      if (flanges==1) {
        for (i=[-1, 1]) {
          translate([i*flangeLocation, -baseY/2-flangeHoleRad*2, 0])
            mountingFlange();
          translate([i*flangeLocation, baseY/2+flangeHoleRad*2, 0])
            rotate([0, 0, 180])
            mountingFlange();
        }
      }
    }// end union

    //Custom Text
      translate([-baseX/2, 0, (baseZ+batDisplace)/2])
        rotate([90, 0, -90])
        linear_extrude(height=.5, center=true, twist=0)
        text(customText, halign="center", valign="center", h=batRad*2);

    //battery cell cut outs
    for (cell=[0:cellCount-1]) {
      translate([0, -batRad*(cellCount-1)+batRad*2*cell,
        batDisplace+baseThick])
        cell();

      //add polarity symbols
      if (cell%2==0) {
        translate([batLen*.4, -cellCount*batRad+batRad+batRad*2*cell, batDisplace])
          polarity();
        translate([-batLen*.4, -cellCount*batRad+batRad+batRad*2*cell, batDisplace])
          polarity(-1);
      } else {
        translate([-batLen*.4, -cellCount*batRad+batRad+batRad*2*cell, batDisplace])
          polarity();
        translate([batLen*.4, -cellCount*batRad+batRad+batRad*2*cell, batDisplace])
          polarity(-1);
      }

      //add cutout for clip conductor

      //cutout to aid battery removal
      translate([0, 0, batDisplace+baseThick])
        rotate([90, 0, 0])
        scale([1.2, 1, 1])
        cylinder(r=batRad, h=cellCount*batRad*2+10, center=true);

      //cutout for battery clip, solder flange, conductor, hookup wire
      for(i=[-1,1]) {

        //clip
        translate([0, -batRad*(cellCount-1)+batRad*2*cell, 0])
        translate([i*(batLen/2+clipThick+clipMount), 0, baseThick+batDisplace])
          cube(clipDimensions, center=true);

        //conductor
        translate([0, -batRad*(cellCount-1)+batRad*2*cell, 0])
        translate([i*(batLen/2+clipThick+clipMount), 0, baseThick+batDisplace])
          cube(conductorDimensions, center=true);

        //solder flange
        if(i<0) {
          translate([0, -batRad*(cellCount-1)+batRad*2*cell, 0])
          translate([i*(batLen/2+clipThick+clipMount-solderFlangeDim[0]/2), 0, 0])
            solderFlange();
        } else {
          translate([0, -batRad*(cellCount-1)+batRad*2*cell, 0])
          translate([i*(batLen/2+clipThick+clipMount-solderFlangeDim[0]/2), 0, 0])
            rotate([0, 0, 180])
            solderFlange();
        }

        //hookup wire channel
        translate([i*(batLen/2+clipThick+clipMount-solderFlangeDim[0]/2), 0, 0])
          cube([wireThick, baseY*2, wireThick], center=true);

      } //end battery clip for
    } //end for

  } // end difference
} //end mainBody

mainBody();

```


[User]
I'd like a customizable design for a rounded rectangular feeding dish, kind of like the existing "FeedingDishWithRoundedCorners.scad" I have, but I'd like it a little more flexible.

Here's what I need:

*   **Basic Shape:** It should be a rectangular dish with rounded corners, like a rounded box with the top cut off.
*   **Dimensions:** The user should be able to control the *outer dimensions* (X, Y, Z) of the dish. So, `dimensionX`, `dimensionY`, and `dimensionZ` will all be exposed as parameters.
*   **Corner Radius:** The radius of the rounded corners should be a parameter, I don't want to have it based on a `factorradius2dim`. I would like to be able to set it directly with the value `corner_radius`.
*   **Wall Thickness:** The thickness of the dish's walls should be user-adjustable using `wall_thickness`.
*   **Inner Lip:**  I need a lip around the top of the *inner* edge, extending inward from the inner wall. The height and width of this lip should be parameters named `lip_height` and `lip_width`.
*   **Inner Bottom:** The inner bottom part should be flat.
*   **Visualization:** It should have a color parameter called `dish_color`.
*   **No specific libraries needed** I don't require any external libraries, and I'd like to keep it as simple as possible.

Essentially, I want to be able to adjust the overall size, corner roundness, wall thickness, and inner lip dimensions of this feeding dish, and also control the color. I would like $fn to be 50 for production and 15 for debugging.

[Assistant]
FeedingDishWithRoundedCorners.scad:
```
//
// Feeding Dish with rounded Corners by Robert Halter
//
// Licensed: Creative Commons - Attribution - Non-Commercial - Share Alike (by-nc-sa)
// see: http://en.wikipedia.org/wiki/Creative_Commons
//
// parametrizable user values
// - outer dimension of hole Feeding Dish X, Y, Z [mm]
// - factor for dimension to radius [Number]
// - wall thinkness [mm]
//
// author: Robert Halter - CH - 28.01.2015
//
// with:   OpenSCAD Version 2014.03
//
// History
// - adapted to http://customizer.makerbot.com/docs
// - X, Y, Z instaed of on Dimension
// - translate to x, y, z = 0
// - inner rounded cube
// - color for visualisation

/* [Size] */

// parametrizable user values - change if you want

// outer dimension of hole Feeding Dish X, Y, Z [mm]
dimensionX = 209; // [50:210]
dimensionY = 149; // [50:150]
dimensionZ = 19; // [15:90]

/* [Hidden] */

dimension = min(dimensionX,dimensionY,dimensionZ);

// factor for dimension to radius [Number]
// This Number is the factor of radius to dimension
factorradius2dim = 12 / 80; // 0.15

// wall thinkness [mm]
wall = 2.0; // [2:3]

// color for visualisation i.e. dark blue
userColorRGB = [0/255, 48/255, 112/255];
// userColorRGB = [30/255, 55/255, 108/255];
// userColorRGB = "DarkBlue";
userColorAlpha = 255/255;

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

// calculated Values - do not change

// radius of outer eight spheres [mm]
radius = dimension * factorradius2dim; // 12 mm with dimension 80 mm and factor 0.15

// number of fragments 0, 3, 5 or bigger
// set to 15 for debugging
// $fn = 15;
// set to i.e. 50 for production
$fn = 50;

// offset for outer sphere translations
offset4sphereX = dimensionX - (2 * radius);
offset4sphereY = dimensionY - (2 * radius);
offset4sphereZ = dimensionZ - (2 * radius);

offset4sphere = dimension - (2 * radius);

// inner hull top extension
innerhulltopextension = wall + radius;

// radius of inner eight sphere
innerradius = radius - wall;

// begin of form

// color of following difference
color(userColorRGB, userColorAlpha)

// difference of 'difference' minus 'translated cube'
// to cut on top of the Cube the thin Wall Parts
difference() {

// translate to x, y, z = 0
translate([radius,radius,radius]) {

//  difference of 'Hull over outer eight spheres' minus 'Hull over inner eight spheres'
difference() {

  // hull over outer eight spheres
  hull() {

    // outer four bottom spheres
    translate([0,0,0]) {
      sphere(r = radius);
    }

    translate([offset4sphereX,0,0]) {
      sphere(r = radius);
    }

    translate([0,offset4sphereY,0]) {
      sphere(r = radius);
    }

    translate([offset4sphereX,offset4sphereY,0]) {
      sphere(r = radius);
    }

    // outer four top spheres
    translate([0,0,offset4sphereZ]) {
      sphere(r = radius);
    }

    translate([offset4sphereX,0,offset4sphereZ]) {
      sphere(r = radius);
    }

    translate([0,offset4sphereY,offset4sphereZ]) {
      sphere(r = radius);
    }

    translate([offset4sphereX,offset4sphereY,offset4sphereZ]) {
      sphere(r = radius);
    }

  } // hull

  // hull over inner eight spheres
  hull() {

    // inner four bottom spheres
    translate([0,0,0]) {
      sphere(r = innerradius);
    }

    translate([offset4sphereX,0,0]) {
      sphere(r = innerradius);
    }

    translate([0,offset4sphereY,0]) {
      sphere(r = innerradius);
    }

    translate([offset4sphereX,offset4sphereY,0]) {
      sphere(r = innerradius);
    }

    // inner four top spheres
    translate([0,0,offset4sphereZ + innerhulltopextension]) {
      sphere(r = innerradius);
    }

    translate([offset4sphereX,0,offset4sphereZ + innerhulltopextension]) {
      sphere(r = innerradius);
    }

    translate([0,offset4sphereY,offset4sphereZ + innerhulltopextension]) {
      sphere(r = innerradius);
    }

    translate([offset4sphereX,offset4sphereY,offset4sphereZ + innerhulltopextension]) {
      sphere(r = innerradius);
    }
  } // hull

} // difference

} // translate

translate([0,0,dimensionZ - (radius * 4 / 5) + wall]) {
  cube([dimensionX,dimensionY, 2 * wall]);
}
} // difference

// end of form

```


[User]
I'd like to create a 3D model of a raindrop, and I'd like to be able to customize it. I saw some code that used a sphere for the bottom and a series of cylinders for the pointy top, which seems like a good approach. The parameters should include:

*   **radius:** The radius of the spherical bottom of the raindrop.
*   **height_mult:** A multiplier for determining the overall height of the raindrop as a multiple of the radius. This multiplier will affect the total height of the cylindrical segment of the drop.
*   **steps:** The number of cylindrical segments that make up the pointed part of the raindrop. More steps will create a smoother point.
*   **facets:** The number of facets around the circumference of the cylinders and sphere.
*   **loops:** An integer that repeats the number of cylinder segments - allows for multiple pointy sections in a single object.

Could you generate an OpenSCAD file that does this? I don't need any extra libraries beyond the standard OpenSCAD ones.

[Assistant]
Raindrop.scad:
```
/*
Creates a 3 dimensional raindrop shape.

parameters:
	radius		radius of the sphere on the bottom of the raindrop shape
	centered	boolean value. sets the bottom sphere as centered (true) on [0, 0, 0],
	or sets the entire object in the positive [x, y, z] quadrant
*/

// Radius in millimeters.
radius = 50; // [1:100]

// Height is a multiple of the radius.
height = 2.8; // [2:20]

// Steps are the number of cylinders to make up the upper pointy end.
steps = 20; // [2:50]

// Controls how many facets go around the curve.
facets = 30; // [5:100]

// A silly bonus feature for revealing how the script works.
loops = 1; // [0:4]

raindrop3D( radius, height, steps, loops, facets );

module raindrop3D(radius, height, steps, loops, facets){

	sphere(radius, $fn = facets );

	for( i = [ 0 : steps * loops - 1 ] ){
		translate([0, 0, radius * height / steps * i])
			cylinder(h = 1 / steps * height * radius, // This is fine.
					r1 = (cos( 180 * i / steps )/2+0.5) * radius,
					r2 = (cos( 180 * (i+1) / steps )/2+0.5) * radius,
          $fn = facets );
	}

}//end of module raindrop3D

```


[User]
I'd like to create a customizable bag clip, similar to a clothespin, but with a curved body and the option for a label. I'd like the design to be parametric so I can easily adjust the dimensions and features.

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

**Size:**

*   `part`:  A dropdown to select "inside", "outside", or "both" to generate the corresponding part(s) of the clip or both.
*   `_length`:  The overall length of the clip.
*   `_width`: The width of the clip.
*   `_outsideThickness`:  The thickness of the outside part of the clip.
*   `_insideThickness`: The thickness of the inside part of the clip.
*  `_hingeGap`: The gap between the inside and outside parts at the hinge. Adjusting this will control how tightly the hinge fits together (smaller/negative values should make the fit tighter).

**Label:**

*   `_labelText`:  Optional text to be placed on the outside of the clip.
*   `_labelFont`: A dropdown to select from various fonts (e.g., "write/orbitron.dxf", "write/letters.dxf", "write/knewave.dxf", "write/BlackRose.dxf", "write/braille.dxf"). I would like to use the `write/Write.scad` library for this.
*   `_labelThickness`: Depth of the label (negative values should emboss it; positive values should extrude).
*   `_labelHeightPercent`: Height of the label as a percentage of the clip's width.
*   `_labelDirection`: A toggle switch or dropdown, with the two values corresponding to placement direction of the label starting from either the hinge (1) or from the clip end (0).
*   `_labelSpace`: Spacing between letters in the label.

**Advanced:**

*   `_curvature`: Controls the curvature of the clip's body (lower values = flatter, 100 = semi-circle).
*   `_hingeDiameter`:  The diameter of the hinge.
*   `_hingeAngle`: Controls the radial size of the hinge arc; this should be adjustable to change how well the pieces hold together.
*   `_clipAngle`: Controls the radial size of the tip arc.
*   `_clipExtension`: The amount the inner section is longer than the outer section. This impacts how tightly the clip closes.  A good starting point might be 1% of the clip length.

The clip itself should be created using primarily 2D operations and extrusions to help with generation time, and the label should be rendered using the `writecylinder` function from the `write/Write.scad` library.

Could you generate the OpenSCAD file or files for this design?

[Assistant]
BagClip3.scad:
```
use <write/Write.scad>

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

/* [Size] */

// Type of part (customizer will create both parts).
part = "inside"; // [inside:Inside, outside:Outside, both:Both]

// Length of the clip.
_length = 120.0; //[30:360]

// Width of the clip.
_width = 9.0;

// Thickness of the outside part of the clip.
_outsideThickness = 2.0;

// Thickness of the inside part of the clip.
_insideThickness = 1.6;

// Gap between the parts at the hinge, use this to adjust how tighly the hinge fits together (smaller/negative values will result in a tighter fit.
_hingeGap = 0.05;

/* [Label] */

// Optional text on the outside of the clip
_labelText = "Hello";

// Font used to render the label
_labelFont = "write/orbitron.dxf"; // ["write/orbitron.dxf":Orbitron, "write/letters.dxf":Basic, "write/knewave.dxf":KneWave, "write/BlackRose.dxf":BlackRose, "write/braille.dxf":Braille]

// Depth of the label (negative values to emboss, positive values to extrude)
_labelThickness = -0.2;

// Height of the label (as a percentage of the clip width)
_labelHeightPercent = 60; // [1:100]

// Label direction
_labelDirection = 1; //[1:Start at Hinge, 0:Start at Clip]

// Spacing between letters
_labelSpace = 1.1;

/* [Advanced] */

// Curvature of the clip (lower values for a flatter arc, 100 for a semicircle)
_curvature = 80; //[10:100]

// Diameter of the hinge
_hingeDiameter = 5.0;

// Controls the radial size of the hinge arc.  Adjust to change how well the pieces hold together.
_hingeAngle = 220; //[180:300]

// Controls the radial size of the tip arc.
_clipAngle = 145; //[90:180]

// Amount the inner section is longer than the outer part in mm, affects how tightly the clip closes. A decent starting point is 1% of the length of the clip.
_clipExtension = 0.5;

////////////////////////////////////////////////////////////////////////

// only works from [0 to 180] degrees, runs clockwise from 12 o'clock
module smallArc(radius0, radius1, angle, res) {
    difference() {
	// full arc
	circle(r=radius1, $fn=res);
	circle(r=radius0, $fn=res);

	for(z=[0, 180 - angle]) {
	    rotate(z)
	    translate([-radius1,0])
	    square(radius1*2, center=true);
	}
    }
}

// arc from [0 to 360] degrees with rounded ends, runs clockwise from 12 o'clock, rounded tips not included in angle computation
module roundArc(radius0, radius1, angle, res) {
    thickness = radius1 - radius0;
    cutAngle = 360-angle;
    centerRadius = (radius0 + radius1)/2.0;

    if (angle > 180) {
	smallArc(radius0, radius1, 180, res);
	rotate(-180) {
	    smallArc(radius0, radius1, angle-180, res);
	}
    } else {
	smallArc(radius0, radius1, angle, res);
    }

    // round ends
    for(t = [ [0,centerRadius],
	    [centerRadius * -sin(cutAngle), centerRadius * cos(cutAngle)] ]) {
	translate(t) circle(r=thickness/2, $fn=32);
    }
}

module outerClip(arcRadius, angle, height, outerThickness, innerThickness, hingeRadius, hingeAngle, clipAngle, labelText, labelFont, labelThickness, labelHeightPercent, labelDirection, labelSpace) {
    ir = arcRadius;
    or = ir + outerThickness;
    clipRadius = innerThickness/2 + 0.1;
    hx = (ir-hingeRadius)*sin(angle/2);
    hy = (ir-hingeRadius)*cos(angle/2);
    cx = (ir-clipRadius)*sin(angle/2);
    cy = (ir-clipRadius)*cos(angle/2);

    // label
    eps = 0.1;
    labelHeight = height * (labelHeightPercent/100);
    labelRadius = or+labelThickness/2;

    module clip() {
        linear_extrude(height=height, center=true) {
            // spine
            rotate(angle/2) roundArc(ir, or, angle, 512);

            // hinge
            difference() {
	        translate([-hx, hy])
	        rotate(angle/2+hingeAngle) {
	            roundArc(hingeRadius, hingeRadius + outerThickness, hingeAngle, 64);
	        }
            }

            // clip
            translate([cx, cy]) rotate(-angle/2) {
	        roundArc(clipRadius, clipRadius+outerThickness, clipAngle, 64);
            }
        }
    }

    module label(thickness) {
        leps = thickness > 0 ? -eps : eps;
	if (labelThickness != 0 && labelText != "") {
	    rotate([0,labelDirection ? 180 : 0,180]) {
		writecylinder(labelText, [0,0,0], labelRadius+leps,0, t=labelThickness+eps, h=labelHeight, font=labelFont, space=labelSpace);
	    }
	}
    }

    if (labelThickness >= 0) {
        clip();
        label(labelThickness);
    }
    else {
        difference() {
            clip();
            label(labelThickness);
        }
    }

}

module innerClip(arcRadius, angle, height, outerThickness, innerThickness, hingeRadius, extension) {
    or = arcRadius;
    ir = or - innerThickness;

    hx = (or-hingeRadius)*sin(angle/2);
    hy = (or-hingeRadius)*cos(angle/2);
    extensionAngle = 2 * asin(extension/(2*or));
    connectorAngle = 2 * asin((hingeRadius*2.5+outerThickness)/(2*or));
    eps = 0.1;

    //	spine
    linear_extrude(height=height, center=true) {
	rotate(angle/2) roundArc(ir, or, angle+extensionAngle, 512);

	// hinge
	translate([-hx, hy]) circle(r=hingeRadius, $fn=64);

	// connector
	rotate(angle/2) roundArc(ir, or, angle, 512);
	for(a=[0:6]) {
            assign(frac=a/7) hull() {
		translate([-hx, hy + hingeRadius/2 * frac, 0]) {
		    circle(r=hingeRadius - hingeRadius*frac, $fn=32);
		}
		rotate(angle/2) {
		    smallArc(ir, or-eps, connectorAngle/2 + frac*connectorAngle/2, 180);
		}
	    }
	}
    }
}

module make() {
	radius = _length / (2 *(_curvature/100));
	angle = 2 * asin(_length/(2*radius));
        t = (part == "both") ? [0,-20,0] : [0,0,0];

	translate([0,-radius,_width/2]) {
		if (part == "inside" || part == "both") {
			translate(t)
                          innerClip(	radius,
							angle,
							_width,
							_outsideThickness,
							_insideThickness,
							_hingeDiameter/2,
							_clipExtension);
		}
                if (part == "outside" || part == "both") {
			outerClip(	radius,
							angle,
							_width,
							_outsideThickness,
							_insideThickness,
							_hingeDiameter/2 + _hingeGap,
							_hingeAngle,
							_clipAngle,
							_labelText,
							_labelFont,
							_labelThickness,
							_labelHeightPercent,
							_labelDirection,
							_labelSpace);
		}
	}
}

make();

```


[User]
Hey, I'm looking to design a cable management rack, similar to what's described in that OpenSCAD file I found. I need something that can hold a bunch of cables of different thicknesses and be mounted to a wall.

The basic idea is a backplate with a series of slots cut into it. These slots would be either 4mm or 8mm wide. I’d want to specify how many of each size of slot I want, as well as the spacing between them. I’d also like to have some flexibility around the height of the backplate and how far out the fingers that hold the cables extend. Ideally, those would be parameters as well.

I also like the idea of having those reinforcing sections at the back like in that file, but those should be optional with a true/false parameter.

It would need to have mounting holes, and the position of those holes should change depending on the number of slots. If there are only a couple slots, I'd like the holes to be oriented vertically in the center of the backplate, but if there are more holes, I’d like them oriented horizontally closer to the ends of the rack.

I'd like all of these things to be configurable as parameters, so I can easily adjust them. Could you please generate that as an OpenSCAD file? I'd prefer no libraries unless there’s a strong need for one.

[Assistant]
cablerack.scad:
```
// Created  by James Trimble - keybase.io/jamestrimble
// Released under Creative Commons - Attribution - Share Alike license

// preview[view:north east, tilt:top diagonal]
Number_Of_4mm_Slots = 3;
Number_Of_8mm_Slots = 3;
Reenforcement = true; //[true,false]

cablerack(Number_Of_4mm_Slots,Number_Of_8mm_Slots,Reenforcement);

module cablerack(num4mm, num8mm, reenforcements) {
	$fn = max($fn, 160);
	spacing = 8;
	thickness = 3;
	backHeight = 30;
	fingerLength = 100;
	rackWidth = num4mm*4+num8mm*8+(2+(num4mm+num8mm-1))*spacing;
	screwHoleRadius = 3.5;
	loc = 8;
	rsize = 16;

	difference() {
		union() {
			if (reenforcements==true) {
				// Create the re-enforcement area
				difference() {
					translate([0,0,-2]) cube([rsize,rackWidth,rsize]);
					translate([rsize-1,-4,rsize+1]) rotate([-90,0,0]) cylinder(r=16,h=rackWidth*2, center=false);
				}
			}

			difference() {
				// Create the solid cable rack
				union() {
					translate([-2,0,0]) cube([2,rackWidth,backHeight]); // back plate
					translate([fingerLength,0,-2]) rotate([0,-60,0]) cube([6,rackWidth,2]); // edge lip
					translate([-2,0,1]) rotate ([0,90,0]) cube([3,rackWidth,fingerLength+2]);
				}

				// subtract the slots
				for (i4mm = [loc:4+spacing:loc+(4+spacing)*num4mm]) {
					translate([1,i4mm,-8]) cube([2*fingerLength,4,2*backHeight]);
				}

				for (i8mm = [loc+(4+spacing)*num4mm:8+spacing:(loc+(4+spacing)*num4mm)+((8+spacing)*num8mm)]) {
					translate([1,i8mm,-8]) cube([2*fingerLength,8,2*backHeight]);
				}
			}
		}

		// create the screw holes
		if (num4mm+num8mm<=2) {
			translate([0,rackWidth/2,backHeight-1.5*screwHoleRadius]) rotate([0,90,0]) cylinder(r=screwHoleRadius,h=thickness*3, center=true);
			translate([0,rackWidth/2,backHeight/2]) rotate([0,90,0]) cylinder(r=screwHoleRadius,h=thickness*3, center=true);
		} else {
			translate([0,2*spacing,backHeight*.75]) rotate([0,90,0]) cylinder(r=screwHoleRadius,h=thickness*3, center=true);
			translate([0,rackWidth-2*spacing,backHeight*.75]) rotate([0,90,0]) cylinder(r=screwHoleRadius,h=thickness*3, center=true);
		}

	}
}
```


[User]
Okay, so I've been playing around with some cool container designs in OpenSCAD, and I'm really digging the Epcot-style look – you know, the geodesic sphere with the dimpled surface. I've got an existing SCAD file that does this (I'll call it "epcot_container.scad"), but it's kind of messy, and I'd really like to have a cleaner, more parametric design.

Here's the gist of what I'm looking for:

*   **Core Shape:** The main container body needs to be based on a partial sphere, essentially a dome shape cut off at a certain height to form the opening of the jar.
*   **Surface Detailing:** I want to achieve the "dimpled" look by dividing the sphere into triangles. The density of these triangles (both horizontally and vertically) needs to be adjustable.
*   **Customization:**  I need parameters to control:
    *   The **overall size** of the container (diameter of the opening).
    *   The **density of the triangle mesh** on the sphere, independently in horizontal (x) and vertical (y) directions.  Ideally, I want a "use default" switch that calculates the x density to about 3.25 times the y density.
    *   **Surface shaping**: There should be parameters to control the "inward" or "outward" bulging of the triangles, which is done in my current code by multiplying the midpoint of the triangle face by a scaling factor.  I'd like two parameters for this, one for triangles that form one ring, and one for the other rings, since those form two distinct groups in my current design.
    *   **Wall thickness** of the container. I want a parameter for this, but I also want the option for it to be set automatically (default), which should be about 2mm for smaller containers, 2.5mm for medium, and 3mm for larger ones.
    *   The **ratio between the top opening and the radius of the sphere** from which the container is generated.  I'd like this to be a percentage.
*   **Lid:** I don't need to design a lid at this time. I have a library of caps I use elsewhere.
*   **Threaded Neck:** The jar needs a threaded neck at the top, that I'd like to be parametric as well. The thread should be created by rotating small sphere sections to cut out the thread into the neck of the jar.
*   **Preview Quality:**  I need a parameter for preview quality, which controls the smoothness of the final shape.
*   **No external libraries:** This should not rely on any external libraries such as MCAD or BOSL.

I think that covers most of it. The existing "epcot_container.scad" uses a lot of math to get the dimensions right. It also uses a `for` loop to create the triangular faces, and does some calculations for the thread that I'd like you to incorporate.  I'm looking for something more robust and flexible for creating these containers. I'd prefer to avoid modules that create separate CSG objects and then `union()` them, especially with the thread. It would be better to do the full mesh manipulation with polyhedrons. The main objective is to create the jar itself with the threaded neck, not the lid.

Could you help me out with this? Let me know if you need more info.

[Assistant]
epcot-style_v1_1.scad:
```
// 'Epcot Style Container' by wstein
// is licensed under the Attribution - Non-Commercial - Share Alike license.
// (c) February 2015
// please refer the complete license here: http://creativecommons.org/licenses/by-nc-sa/3.0/legalcode
//
// Version 1.1:
// - workaround for current customizer global parameter bug

/* [Dimensions] */

//top hole diameter
size=50;

//ignores the X / Y density settings
use_default_density = 1; // [0:false, 1:true]

// basicly the X Density should be about 3.25 * Y Density. For the default values please refer the thing instructions.
x_density=26; // [15:100]
y_density=8;  // [1:50]
function get_x_density() = (use_default_density ? round(get_y_density() * 3.25 - 0.2) : x_density);
function get_y_density() = (use_default_density ? round(sqrt(size * 50) / 6.25 - 0.2) : y_density);
echo(str("X density = ", get_x_density()));
echo(str("Y density = ", get_y_density()));

/* [Appearance] */

shaping_1=50; // [-100:100]
shaping_2=50; // [-100:100]

/* [Expert] */

// default 80, use lower values for faster preview (no need to use more than 100!)
quality=80;

// ratio of top hole and sphere diameter, you may also adjust the density setting, after changing this value
sphere_lid_ratio=70; // [40:90]

//Believe me, you don't want to change this setting! This is only to be compatible with the base thing http://www.thingiverse.com/thing:634383. Value -1 means 2mm up to size 60, 2.5mm from 61 - 100. 3mm for larger. default = -1
wall_thickness=-1;
function get_wall_thickness() = (
	wall_thickness!=-1 ? wall_thickness : (
	size <= 60 ? 2.0 : (
	size <= 100 ? 2.5 :
   3.0 )));
echo(str("get_wall_thickness() = ", get_wall_thickness()));

/* [Hidden] */

// some basic calculations

ratio = sphere_lid_ratio / 100;

shaping1=1+shaping_1/1000;
shaping2=1+shaping_2/1000;

r4=size/2;
r3=r4+get_wall_thickness()/2;
r2=r3/sqrt(1-ratio*ratio);
r1=r2/20;
r=r2;
thread_height=(r4*2>20?r4*2/6:20/6);
height=r2*2*ratio;

b0=-asin(ratio);
bn=asin(ratio);

ad=360/get_x_density();
bd=(bn-b0)/get_y_density()*2;

a_step=360/quality;
z_step=height/quality*2;
ta_step=250/quality;
tz_step=thread_height/quality;

thread_thickness=min(get_wall_thickness(),thread_height/2.5);

// build container with thread

build_container();

module build_container()
union()
{
	body();
	thread();
}

module body()
union()
{
	// build rotation
	for(n=[0:get_x_density()-1],m=[0:get_y_density()-1])
	triangle(ad*(n+m/2),b0+bd*m/2);

	// build top and buttom
	for(n=[0:get_x_density()-1],m=[b0,bn])
	assign(shift=((m-b0)/bd%1))
	assign(p1=[r*cos((n+shift)*ad-ad/2)*cos(m), r*sin((n+shift)*ad-ad/2)*cos(m), r*sin(m)])
	assign(p2=[0, 0, r*sin(m)])
	assign(p3=[r*cos((n+shift)*ad+ad/2)*cos(m), r*sin((n+shift)*ad+ad/2)*cos(m), r*sin(m)])
	{
		if(m != b0)
		polyhedron(points = [p1,p2,p3],faces = [[1,2,0]]);
		else
		polyhedron(points = [p1,p2,p3],faces = [[0,2,1]]);
	}
}

module triangle(a,b)
assign(p1=[r*cos(a-ad/2)*cos(b), r*sin(a-ad/2)*cos(b), r*sin(b)])
assign(p2=[r*cos(a)*cos(b+bd/2), r*sin(a)*cos(b+bd/2), r*sin(b+bd/2)])
assign(p3=[r*cos(a+ad/2)*cos(b), r*sin(a+ad/2)*cos(b), r*sin(b)])
assign(p4=[r*cos(a+ad)*cos(b+bd/2), r*sin(a+ad)*cos(b+bd/2), r*sin(b+bd/2)])
assign(pm0=(p1+p2+p3)/3*shaping1)
assign(pm1=(p2+p3+p4)/3*shaping2)
polyhedron(points = [pm0,p1,p2,p3,p4,pm1],
     faces = [
				[1,2,0],
				[0,2,3],
				[1,0,3],
				[2,5,3],
				[2,4,5],
				[5,4,3],
			]);

module thread()
translate([0,0,height/2])
union()
{
	translate([0,0,0.001])
	cylinder(r=r3,h=thread_height+r1+get_wall_thickness(),$fn=quality);

	translate([0,0,r1+get_wall_thickness()/2])
	for(m=[0:180:359])
	rotate([0,0,m])
	for(n=[0:quality-1])
	thread_part(n,a_step,z_step);
}

module thread_part(n)
hull()
{
	for(m=[n,n+1])
	assign(a=m*ta_step)
	assign(z=m*tz_step)
	rotate([0,0,40+a])
	translate([r3,0,z])
	resize([0,0,thread_thickness])
	rotate([90,0,0])
	sphere(r=get_wall_thickness()/2,$fn=12);
}

```


[User]
I'm looking for an OpenSCAD design for a chalk and sponge holder, something that can be mounted near a chalkboard. The basic idea is a half-pipe for the chalk and a box for the sponge, all connected together.

Here are the key parameters I'd like to control:

*   **`chalk_r`**: Radius of the chalk in mm.
*   **`chalk_l`**: Length of the chalk holder in mm.
*   **`sponge_w`**: Width of the sponge in mm.
*   **`sponge_h`**: Height of the sponge in mm.
*   **`sponge_th`**: Thickness of the sponge in mm.
*   **`wall`**: Wall thickness of the holder in mm.
*   **`OpenTo`**: A string parameter that takes "left" or "right" to specify which side the sponge box opens on.

I'd like the design to have rounded corners on the sponge box and the half-pipe for the chalk should have rounded edges on the open side. Also, I need the flat back of the sponge holder to have a bit of a flat section in the middle for mounting, perhaps with double-sided tape. The length of that mounting area should be another parameter, I guess we can call it `flatlen`.

I'm hoping you can generate a single .scad file that will be fully parametric using all these parameters. No special libraries are needed, just the basic OpenSCAD primitives.

[Assistant]
chalkholder_V9.scad:
```
//set the type of holder
OpenTo="right"; //["left":left side open, "right":right side open, "cut_for_debug":cut out to see the inside]

//Chalk radius in mm
chalk_r=4.5;

//Chalk holder length in mm
chalk_l=65;

//sponge width in mm
sponge_w=40;

//sponge height in mm
sponge_h=30;

//sponge thickness in mm
sponge_th=20;

//Wall thickness in mm
wall=1;

/* [Hidden] */

$fn=64;

wiggle=.5;
flatlen=15;//for tesa powerstrips
holder_in_r=chalk_r+wiggle;
holder_out_r=chalk_r+wall+wiggle;

edge_cutoff=wall*5;

/*
Chalk and sponge holder
Version 9, February 2015
Written by MC Geisler (mcgenki at gmail dot com)

A convenient storage for your blackboard accessories.

Have fun!

License: Attribution 4.0 International (CC BY 4.0)

You are free to:
    Share - copy and redistribute the material in any medium or format
    Adapt - remix, transform, and build upon the material
    for any purpose, even commercially.
*/

module half_pipe()
{
    //half pipe
    difference()
    {
        cylinder(r=holder_out_r,h=chalk_l,center=true);
        cylinder(r=holder_in_r,h=chalk_l*2,center=true);
        translate([0,chalk_l/2,0])
            cube([chalk_l,chalk_l,chalk_l+2],center=true);
    }

    //stabilize the half pipe
    //translate([-chalk_r-wiggle-wall/2,-flatlen/2,0])
    //    cube([wall,flatlen,chalk_l],center=true);

    //half pipe edges rounded
    edge_pos=chalk_r+wiggle+wall/2;
    translate([-edge_pos,0,0])
        cylinder(r=wall/2,h=chalk_l,center=true);
    translate([edge_pos,0,0])
        cylinder(r=wall/2,h=chalk_l,center=true);
}

module box_rounded(a,b,c,edge_cutoff)
{
    difference()
    {
        cube([a,b,c],center=true);

        translate([a/2,0,-c/2])
            difference()
            {
                cube([edge_cutoff,b*2,edge_cutoff],center=true);

                translate([-edge_cutoff/2,0,edge_cutoff/2])
                    rotate([90,0,0])
                        cylinder(r=edge_cutoff/2,h=b*2,center=true);
            }
   }
}

module sponge_box()
{
    outer_th=sponge_th+2*(wall+wiggle);
    outer_h=sponge_h+2*(wall+wiggle);
    outer_w=sponge_w+2*(wall+wiggle);

    //sponge box
    translate([     outer_th/2-holder_out_r,
                    -outer_h/2-holder_out_r+wall,
                    outer_w/2-chalk_l/2      ])
        difference()
        {
            union()
            {
                //outer cube
                box_rounded(outer_th,outer_h,outer_w,edge_cutoff);

                //stabilize the half pipe with a wall adder
                translate([-sponge_th/2-wiggle-wall/2,
                        -flatlen/2+sponge_h/2+wiggle+holder_out_r,
                        -(sponge_w+2*(wall+wiggle))/2+chalk_l/2 ])
                    cube([wall,flatlen,chalk_l],center=true);
            }

            //cut out sponge
            translate([0,0,sponge_w/2])
                box_rounded(sponge_th+2*wiggle,sponge_h+2*wiggle,sponge_w+2*wiggle+sponge_w,edge_cutoff-wall*2);

           //cut out the stabilizer
           translate([0,0,sponge_w/2+sponge_w+wiggle*2+wall])
                cube([sponge_th*2,sponge_h+2*wiggle,sponge_w+2*wiggle+sponge_w],center=true);

            //cut out for the fingers
            translate([0,0,sponge_w/2+(wall+wiggle)])
                rotate([0,90,0])
                    cylinder(r=(sponge_h+2*wiggle)/2,h=sponge_th*2,center=true);

            //cut off side edges to be safer
            translate([outer_th/2,outer_h/2*0,outer_w/2])
                difference()
                {
                    cube([edge_cutoff,sponge_h*2,edge_cutoff],center=true);
                    translate([-edge_cutoff/2,0,-edge_cutoff/2])
                        rotate([90,0,0])
                            cylinder(r=edge_cutoff/2,h=sponge_h*2,center=true);
                }

        }
}

module holder()
{
    half_pipe();
    sponge_box();
}

if (OpenTo=="left")
{
    holder();
}
else
{
    if (OpenTo=="right")
    {
        rotate([0,180,0])
            mirror([0,0,1])
            {
                holder();
            }
    }
    else
    {
        if (OpenTo=="cut_for_debug")
        {
            rotate([0,180,0])
                mirror([0,0,1])
                {
                    difference()
                    {
                        holder();
                        translate([0,-25,-50]) cube(30);
                    }
                }
        }
    }
}

```


[User]
Hi! I'm looking for an OpenSCAD design for a license plate holder, specifically for the standard Australian L and P plates which are 150mm x 150mm. The main idea is that the plate should be able to slide in and out from the side, so I don't need to remove the whole thing from the car window every time. I'd like to be able to customize where the suction cups (or whatever I use for mounting) are attached, and the size of those attachment holes.

I've seen a design that does this, but I want it parametric. Specifically, I would like to be able to control the following:
- The overall thickness of the plate holder
- The amount the plate sits inside the holder (the depth of the recess).
- The radius of the holes used for mounting attachments (like suction cups).
- Which sides have attachment points (top, bottom, left, and right) and if these attachment points exist at all.
- The width of the channel used to slide the plates in and out.
- The height and thickness of the lip (raised edge) that holds the license plate.

I don't really need anything too fancy for the attachment points themselves. Just something that can be easily customized, and isn't a suction cup itself. I'm planning to attach suction cups or hooks separately. I'd like the code to be organized and documented so I can easily modify it later if I need to.

It would be ideal to keep the design as simple and printable as possible. Let me know if you have any questions or need any clarification. Thanks!

[Assistant]
PL_Plate_Holder.scad:
```
/********************************************************************************************************
P-Plate and L-Plate Holder v1.0 by Mike Thompson 3/1/2015, Thingiverse: mike_linus

The Plate Holder is designed to hold the standard 150mm x 150mm Australian L or P plates.

The key advantage is the ability to slide the plate in and out without having to remove the mounting mechanism.  This is particularly handy when frequently changing plates between drivers.

The attachment locations and hole size are customisable for various suction cup or hook sizes and placements.
********************************************************************************************************/

/**************************************************************************
Enter the values corresponding to your tray requirements in this section
***************************************************************************/

/* [Attachment Options] */

//The radius of the attachment hole
sucker_hole_radius=4;
//Top Attachment
tsucker="include";//[include,exclude]
//Left Attachment
lsucker="exclude";//[include,exclude]
//Right Attachment
rsucker="exclude";//[include,exclude]
//Bottom Attachment
bsucker="exclude";//[include,exclude]

module holder()
{
	difference()
	{
		hull()
		{
			cylinder(r=2, h=4);
			translate([159,0,0])cylinder(r=2, h=4);
			translate([0,153,0])cylinder(r=2, h=4);
			translate([159,153,0])cylinder(r=2, h=4);
		}
		translate([5,5,0])cube([149,151,6]);
	}
}

module sucker()
{
	difference()
	{
		hull()
		{
			cylinder(r=10,h=1);
			translate([-10,-2,0])cube([20,15,1]);
		}
		cylinder(r=sucker_hole_radius,h=1);
	}
}

module slots()
{
	translate([5.1,158,2])rotate([90,180,0])cylinder(r=1.5,h=153,$fn=50);
	translate([5,5.1,2])rotate([0,90,0])rotate([0,0,-90])cylinder(r=1.5,h=149,$fn=50);
	translate([153.9,158,2])mirror(0,0,1)rotate([90,180,0])cylinder(r=1.5,h=153,$fn=50);
	intersection()
	{
		translate([4,5.1,2])rotate([0,90,0])rotate([0,0,-90])cylinder(r=1.5,h=152,$fn=50);
		translate([153.9,156,2])mirror(0,0,1)rotate([90,180,0])cylinder(r=1.5,h=153,$fn=50);
	}
	intersection()
	{
		translate([5.1,155,2])rotate([90,180,0])cylinder(r=1.5,h=152,$fn=50);
		translate([3,5.1,2])rotate([0,90,0])rotate([0,0,-90])cylinder(r=1.5,h=153,$fn=50);
	}

}

module build()
{
	difference()
	{
		union()
		{
			holder();
			if (bsucker=="include")
			{
				translate([79,-10,0])sucker();
			}
			if (rsucker=="include")
			{
				translate([169,141,0])rotate([0,0,90])sucker();
			}
			if (lsucker=="include")
			{
				translate([-10,141,0])rotate([0,0,-90])sucker();
			}
			if (tsucker=="include")
			{
				translate([79,163,0])rotate([0,0,180])sucker();
			}
		}
		slots();
	}
	translate([0,150,0])cube([159,5,1]);
}

build();
```


[User]
Hey there, I'm looking to create a customizable spool axle adapter in OpenSCAD. I've seen some designs out there, but I need one that I can really tweak to fit various spools and axles.

Essentially, it's a cylindrical adapter with a hole through the center for the axle and a larger outer diameter that fits into the spool. It also should have a spacer section in the middle to keep the adapter centered within the spool.

Here's what I need to be able to customize:

*   **Axle Hole Diameter:** The diameter of the center hole that the axle goes through.
*   **Spool Hole Diameter:** The diameter of the hole in the spool that this adapter will be inserted into.
*   **Adapter Diameter:**  The outer diameter of the adapter, which needs to be slightly larger than the spool hole diameter to create a snug fit. I'd like this to be derived by adding a fixed amount to the spool_hole_diameter, rather than defined as an absolute number. Something like `adapter_diameter = spool_hole_diameter + some_amount`.
*   **Spacer Length:**  The length of the spacer section of the adapter.
*   **Spool Hole Depth:** The depth that the adapter will insert into the spool hole.  This will be the length of the smaller diameter section of the adapter on each side of the spacer.

I want to make sure the axle hole goes all the way through, and extends 1 mm beyond both ends of the adapter.  This is important for clearance.

I’m planning on printing two of these adapters for each spool, so the design should generate just one adapter and I'll mirror it myself in my slicer. The design should be optimized to use minimal material, like the design I saw that had a stepped outer diameter.

Also, I’d like to set the `$fa` and `$fs` variables for resolution to `1` in the code for printability.

So to summarize, I need a single, parametric, OpenSCAD adapter model based on these specifications, that I'll be able to print two of, mirrored, for each spool. I'm not looking for any special libraries or fancy functions - just plain OpenSCAD.

[Assistant]
custom_spool_axle_adapter.scad:
```
//
// Customizable Spool Axle Adapter (by Robert Halter)
// Licensed: Creative Commons - Attribution - Non-Commercial - Share Alike (by-nc-sa)
// see: http://en.wikipedia.org/wiki/Creative_Commons
//
// Generates one adapter - print two of it to be symmetric
// I optimzed/reduced the used Material on the bigger diameter.
//
// Thanks to Emanresu.
// Original design and code by emanresu (http://www.thingiverse.com/Emanresu)
// Customizable Spool Adapter http://www.thingiverse.com/thing:82800
// Origianl Text from him:
// Generates two symmetric spool bearings/axle adapters/what have you
// spacer can be used to center the spool on a specific axle,
// or to simply keep the bearing/axle adapter from sliding into the spool

// parametrizable user values - change if you want

/* [Diameter] */

// diameter of the axle hole [mm]
axle_hole_diameter = 19;

// diameter of spool hole [mm]
spool_hole_diameter = 27;

// diameter of spool hole [mm]
adapter_diameter = spool_hole_diameter + 5;

/* [Lengts] */

// length of spacer [mm] (useful for centering a spool)
spacer_length = 20;

// distance bearing sticks into spool hole [mm]
spool_hole_depth = 8;

/* [Hidden] */

// set openSCAD resolution
$fa = 1;
$fs = 1;

// begin of form

// translate to x, y, z = 0
translate([adapter_diameter/2, adapter_diameter/2, 0]) {
	difference() {
		union() {
			// inner adapter
			cylinder(r = spool_hole_diameter/2, h = spacer_length + spool_hole_depth);
			// outer adapter cylinder
			translate([0, 0, spacer_length - (adapter_diameter - spool_hole_diameter)]) {
				cylinder(r2 = adapter_diameter/2, r1 = spool_hole_diameter/2, h = adapter_diameter - spool_hole_diameter);
			}
		}
		// axle hole
      // to be sure make the hole on each end 1 mm longer
		translate([0, 0, -1]) {
      	cylinder(r = axle_hole_diameter/2, h = spacer_length + spool_hole_depth + 2);
		} // translate
	} // difference
} // translate

// end of form

```


[User]
Hey, I'm looking to create a customizable wheel design for 3D printing, similar to what's often used in hobby projects. I've seen some online but I'd like to make one with specific dimensions.

Essentially, I need a wheel that has a circular profile with a central axle hole. The wheel should have a thicker hub area around the axle hole, and I'd like to have the option to create a concavity on the main part of the wheel, creating a sort of rounded or bowl-like shape. I think I should be able to control how deep the concavity goes.

Here are the things I want to be able to specify as parameters:

*   **Outer Diameter (od):** The overall diameter of the wheel.
*   **Inner Diameter (id):** The diameter of the axle hole.
*   **Wheel Thickness (wheel\_thick):** The thickness of the main, rounded part of the wheel.
*   **Hub Thickness (hub\_thick):** The thickness of the hub around the axle hole.
*   **Hub Diameter (hub\_dia):** The diameter of the flat part of the hub.
*   **Concavity Minimum Thickness (concave\_min\_thick):** The minimum thickness of the wheel at its thinnest point if a concavity is used, which I'd like to be optional, controlled by a parameter. If `concave_min_thick` is set to the min of the hub and wheel thickness, there will be no concavity.
*   **Resolution for Cross Section Circle (small\_fn):** The resolution (number of segments) of the small circle defining the cross section of the wheel.
*   **Overall Resolution (large\_fn):** The resolution (number of segments) for the wheel's rotation.
*   **Cut in Half (half):** A boolean parameter to cut the wheel in half to help with printing (sometimes you need supports).

It would be great if the OpenSCAD file generated respected all the given parameters and allowed easy adjustment of each of them. I'm not familiar with MCAD or any other scad libraries, so I'd prefer a solution in vanilla OpenSCAD.  I'd prefer a single scad file, if possible, since it seems like this design shouldn't require separate ones. Can you help me with this?

[Assistant]
hobby_wheel.scad:
```
// Hobby_wheel.scad
// Hobby store wooden wheels are expensive. Well, now you can create your own in any size you want!
// Licence is: Creative Commons - Attribution - Share Alike
// You can fulfil the "attribution" legal requirement by linking back to:
//		http://www.thingiverse.com/thing:674574

 /* [main] */

// The outer diameter of the wheel.
od=30;

// The diameter of the axle hole in the wheel.
id=7.5;

// How thick the round part of the wheel is
wheel_thick=6;

// How thick the hub part of the wheel is.
hub_thick=4;

// How big around the flat part of the hub is.
hub_dia=10;

// How thin the concavity of the wheel is at its thinnest point. Set this to min(hub_thick,wheel_thick) for no concavity.
concave_min_thick=2;

// the resolution of the small, cross-sectional circle of the wheel.
small_fn=24;

// The resolution of the overall wheel.
large_fn=128;

// Cut the wheel in half.  Otherwise, you may need to use support material in some circumstances.
half=0; // [0:no,1:yes]

/* [hidden] */

hmax=od/2-id/2-wheel_thick/2;
hub_overlap=hub_dia/2-id/2;

scoche=0.001;
halfscoche=scoche/2;

module concave_thing(){
	thick=od/2-id/2-wheel_thick+hub_overlap; // distance between hub and wheel
	cen=thick/2+id/2; // centred between the hub and the wheel
	translate([cen,-concave_min_thick/2,0]) square([0.1,concave_min_thick]);
}

difference(){
	rotate_extrude($fn=large_fn)
	{
		hull(){
			translate([od/2-wheel_thick/2,0,0]) circle(r=wheel_thick/2,$fn=small_fn);
			concave_thing();
		}
		hull(){
			translate([id/2,-hub_thick/2,0]) square([hub_overlap,hub_thick]);
			concave_thing();
		}
	}
	if(half==1){
		translate([-(od+scoche)/2,-(od+scoche)/2,-(max(wheel_thick,hub_thick)+scoche)]) cube([od+scoche,od+scoche,max(wheel_thick,hub_thick)+scoche]);
	}
}
```


[User]
Hey, I'm looking to create a customizable button in OpenSCAD. I'd like to be able to adjust a few things: the overall diameter and height of the button, the type of edge it has (either a rounded or square border), an extra height for the border, and the number and size of holes arranged in a circle around the center. Also the distance from the center for the holes should be adjustable.

For the edge, it should be either fully rounded or with straight lines perpendicular to the top and bottom of the main button body. I'd also like to set the smoothness of the curves, controlling the number of facets of the circle approximations.

So, I need parameters for:

*   `button_diameter`: the overall diameter of the button.
*   `button_height`: the main height of the button.
*   `border_type`: a string to choose between "round" or "square" for the edge.
*   `extra_border`: additional height for the edge.
*  `smoothness`: an integer to control the smoothness of the curves.
*   `num_holes`: the number of holes around the center.
*   `hole_diameter`: the diameter of each hole.
*  `inner_radius`: distance from center of the holes.

I think that covers it. Can you generate the OpenSCAD code for this?

[Assistant]
knoflik.scad:
```
/* [Dimensions] */

//Button diameter
button_diameter=45;

//Button height
button_height=5;

/* [Holes] */

//Number of holes
num_holes=6;

//Diameter of individual holes
hole_diameter=4;

//Distance of holes from the center
inner_radius=9;

/* [Other] */

//type of the border
border_type="round"; //[square, round]

//additional height of the border
extra_border=2;

//Smoothness (complexity) of the model
smoothness=20; //[4:200]

module button_holes(num_holes=num_holes, ring_radius=inner_radius, hole_diameter=hole_diameter, hole_height=height) {
		for (i=[1:num_holes]) {
  			rotate([0,0,360/num_holes*i])
			translate([ring_radius,0,-1])
  				cylinder(r=hole_diameter/2, h=hole_height+2);
		}
}

module button(button_diameter=45, button_height=5, extra_border=2,
    smoothness=0,
    border_type="square", num_holes=4, ring_radius=10, hole_diameter=4) {

	border_diameter=button_height+extra_border;

	difference() {
		if (border_type=="round") {
		union() {
			cylinder(r=(button_diameter-border_diameter)/2, h=button_height, $fn=smoothness);

			rotate_extrude($fn=smoothness)
			translate([(button_diameter-border_diameter)/2, border_diameter/2])
        		circle(r=(button_height+extra_border)/2);
		}
		} else {
		union() {
  	  		cylinder(r=button_diameter/2, h=button_height, $fn=smoothness);

			rotate_extrude($fn=smoothness)
			translate([button_diameter/2-border_diameter, 0])
				square([border_diameter, border_diameter]);
		}
		}

		button_holes(
			num_holes=num_holes,
			ring_radius=ring_radius,
			hole_diameter=hole_diameter,
			hole_height=button_height
			);
	}
}

button(
	button_diameter=button_diameter,
	button_height=button_height,
	border_type=border_type,
	extra_border=extra_border,
	smoothness=smoothness,
	num_holes=num_holes,
	ring_radius=inner_radius,
	hole_diameter=hole_diameter
	);

```


[User]
I'm looking to create a parametric feeder system for surface mount components, based on an existing design I found. I'd like to be able to generate OpenSCAD files for this, and I'm aiming for a system that can handle multiple feeder lanes side-by-side.

Here's what I need:

*   **Overall Structure:** The design should consist of a base with multiple parallel feeder lanes, each with a slot for the component tape, a slot underneath for the components themselves, and a mechanism to peel the cover tape.
*   **Parametric Dimensions:** I need to be able to easily adjust these parameters:
    *   Number of feeders (lanes).
    *   Tape slot width (to accommodate different tape widths with a little margin).
    *   Tape slot height (based on tape thickness plus margin).
    *   Width of the component slot (below the tape).
    *   Height of the component slot.
    *   Total length of the feeder.
    *   Spacing between the feeders (lanes).
    *   Thickness of the side walls of each feeder lane.
    *   Thickness of the base bottom.
    *   Thickness of the top of the feeder.
    *   Taper angle at the tape entry and exit points.
    *   Height of the gap under the tape peeling bridge.
    *   Width of the tape peeling bridge, as viewed from the side.
    *   Thickness of the top of the peeling bridge.
    *   Distance of the peeling bridge from the front of the component area.
    *   Height of the tape peeling ramp.
    *   Horizontal length of the tape peeling ramp.
    *   Extra horizontal length of the ramp at its high end.
    *   Horizontal space between the peeling bridge and the start of the ramp.
    *   Thickness of the plate that connects all the feeders together at the base.
*   **Tape Handling:** Each feeder lane needs a tape slot with tapered ends, a component slot underneath, a bridge for peeling the tape, and a ramp to help guide the tape.
*   **Multiple Feeders:** The design should have multiple feeders, all joined by a base plate. The number of feeders, as mentioned, should be a parameter.

I'd prefer to get the design in one or more OpenSCAD files. I'm not sure if any existing libraries like BOSL2 would be helpful, but feel free to use those if it simplifies the code. I'm looking to avoid things like `linear_extrude` and instead go with `cube()` and `hull()` type approaches. I'd also like to be able to adjust the number of feeders and all the dimensions easily without having to dig into the code. Please organize the code into modules and try to write clear comments.

[Assistant]
smd_feader.scad:
```
// Manual SMT cut strip feeder array.

// TODO: cleanup.

/* [Hidden] */
eps1 = 0.0001;
eps2 = 2*eps1;

/* [Setting] */

// Number of feeders.
feeders_count = 10;

// Width of the tape slot (tape width + margin).
tape_slot_width = 8.5;

// Height of the tape slot (tape thickness + margin)
tape_slot_height = 1.5;

// Width of the slot below the tape.
part_slot_width = 6;

// Height of the slot below the tape.
part_slot_height = 2;

// Overall length.
total_length = 20;

// Spacing between feeders.
inter_feeder_space = 4;

/* [Tweaking] */

// Thickness of side walls.
side_wall_width = 1;

// Thickness of the bottom.
bottom_thickness = 1;

// Thickness of the top.
top_thickness = 1;

// Taper angle at the tape entry and exit ends.
part_slot_taper_angle = 25;

// Height below the tape peeling bridge.
bridge_gap = 1.5;
// Width of the tape peeling bridge, viewing from the side.
bridge_width = 3;

// Thickness of the tape peeling bridge top.
bridge_top_thickness = 1;

// Distance of the peeling bridge from the front of the part.
bridge_offset = 3;

// Total bridge height.
bridge_height = bridge_gap + bridge_top_thickness;

// Height of the tape peeling ramp.
ramp_height = 3;

// Horizontal length of the tape peeling ramp.
ramp_length = 4;

// Extra length at the high end of the ramp.
ramp_tail_length = 7;

// Horizontal space between bridge and ramp.
ramp_offset_from_bridge = 1;

ramp_offset = bridge_offset + bridge_width + ramp_offset_from_bridge;

// Thickness of the plate that connects feeders.
plate_thickness = bottom_thickness;

base_length = total_length;
base_height = bottom_thickness + part_slot_height + tape_slot_height;
base_width = tape_slot_width + 2*side_wall_width;

ramp_width = base_width;

module tape_slot_taper(x, y, a) {
  translate([x, y, 0])
  rotate([0, 0, a])
  translate([-3*side_wall_width/2, 0, 0])  cube([3*side_wall_width, eps1, tape_slot_height+eps2]);
}

module base_body() {
  cube([base_length, base_width, base_height]);
}

module parts_slot() {
 translate([-eps1, (base_width-part_slot_width)/2, 0])
    cube([base_length+eps2, part_slot_width, part_slot_height]);
}

module tape_slot() {
 a = part_slot_taper_angle;

 translate([-eps1, (base_width-tape_slot_width)/2, 0])
     cube([base_length+eps2, tape_slot_width, tape_slot_height+eps2]);

 hull() {
  tape_slot_taper(0,  side_wall_width/2, a);
  tape_slot_taper(0, base_width - side_wall_width/2, -a);
 }

 hull() {
 tape_slot_taper(total_length, side_wall_width/2, -a);
 tape_slot_taper(total_length, base_width - side_wall_width/2, a);
 }
}

module base_main() {
  difference() {
    base_body();
    translate([0, 0, bottom_thickness]) parts_slot();
    translate([0, 0, bottom_thickness+part_slot_height-eps1]) tape_slot();
  }
}

module top_ramp() {
  translate([0, (base_width-ramp_width)/2, 0])
  hull() {
    cube([eps1, ramp_width, eps1]);
    translate([ramp_length, 0, 0])  cube([eps1, ramp_width, ramp_height]);
    translate([base_length - ramp_offset, 0, 0])  cube([eps1, ramp_width, ramp_height]);
  }
}

//module top_hole(x, l, w) {
//  translate([x, (base_width-w)/2, -eps1]) cube([l, w, top_thickness + eps2]);
//}

module bridge_main() {
  bridge_height = bridge_gap + bridge_top_thickness;
  difference() {
    cube([bridge_width, base_width, bridge_height]);
    translate([-eps1, (base_width - tape_slot_width)/2, -eps1]) cube([bridge_width+eps2, tape_slot_width, bridge_gap+eps1]);
  }
  cube([total_length - bridge_offset, side_wall_width, bridge_height]);

  translate([0, base_width - side_wall_width, 0]) cube([total_length - bridge_offset, side_wall_width, bridge_height]);
}

module top_main() {
  difference() {
  cube([base_length, base_width, top_thickness]);
  //top_hole(top_hole_offset, top_hole_length, tape_slot_width);
}
  translate([ramp_offset, 0, top_thickness - eps1]) top_ramp();
}

module one_feeder() {
   base_main();
   translate([0, 0, base_height-eps1]) top_main();
   translate([bridge_offset, 0,  base_height + top_thickness - eps2]) bridge_main();
}

module main() {
  width = feeders_count*base_width + (feeders_count-1)*inter_feeder_space;
  for ( i = [0 : feeders_count-1] ) {
    translate([0, i*(base_width + inter_feeder_space - eps1), 0]) one_feeder();
  }
  cube([base_length, width, plate_thickness]);
}

// NOTE: rotation around z for better view angle on thingieverse.
translate([0, 0, base_length]) rotate([0, 90, 180]) main();

```


[User]
Hey, I'm looking to get a parametric headphone holder designed in OpenSCAD. I've got a basic design in mind but I need it to be fully customizable.

Here's the general idea: It should have a vertical back piece, a horizontal top piece, and a vertical front piece, forming a sort of "U" shape. Think of it like a small shelf. There should also be rounded supports connecting the back to the top, and the top to the front.

I want to be able to control:

*   **width:**  The overall width of the holder.
*   **back_height:** The height of the vertical back.
*   **front_height:** The height of the vertical front.
*   **thickness:** The thickness of the main material.
*   **front_length:**  The length of the horizontal piece (the 'shelf').
*   **hole_size:** The diameter of mounting holes on the back, I would like four of them. Two on the top and two on the bottom.
*   **bottom_hole_height:**  The vertical position of the lower mounting holes.
*   **top_hole_height:** The vertical position of the upper mounting holes.

I need this all to be in one file if possible. And please make it so it uses $fs and $fa. Thanks!

[Assistant]
Simple_Headphone_Holder.scad:
```
$fs=.5;
$fa=.5;
width = 40;
hole_size = 3;
back_height=100;
front_height=50;
thickness=20;
bottom_hole_height=40;
top_hole_height=80;
front_length=60;
difference()
{
	union()
	{
	cube([thickness,width,back_height]);
	cube([front_length,width,thickness]);
	translate([front_length,0,0])cube([thickness,width,front_height]);
	rotate([90,0,0])translate([thickness/2,back_height,-width/2])cylinder(h=width, r=thickness/2, center=true);
	rotate([90,0,0])translate([front_length+thickness/2,front_height,-width/2])cylinder(h=width, r=thickness/2,center=true);
}
rotate([0,90,0])translate([-bottom_hole_height,10,-1])cylinder(d=hole_size, h=thickness+2);
rotate([0,90,0])translate([-bottom_hole_height,width-10,-1])cylinder(d=hole_size, h=thickness+2);
rotate([0,90,0])translate([-top_hole_height,width-10,-1])cylinder(d=hole_size, h=thickness+2);
rotate([0,90,0])translate([-top_hole_height,10,-1])cylinder(d=hole_size, h=thickness+2);
}

```