[User]
Okay, I'm looking for an OpenSCAD design for a customizable jar/bottle with a screw-on lid, and I'd like it to be flexible enough to create different shapes and sizes. I'd like to be able to control both the internal and external dimensions of the container, and ideally, I want to reduce the amount of plastic needed while still maintaining sturdiness. I'll need a few different output options: a standard model and also one suitable for vase mode.

Here's a breakdown of the features and parameters I'm thinking of:

**General Dimensions:**

*   **Inner Diameter (`iDia`):** This would be the diameter of the opening of the jar/bottle.
*   **Inner Height (`iH`):** The internal height of the main body of the container.

**Wall Thickness:**

*   **Vertical Wall Thickness (`wallXY`):** This parameter will control the thickness of the vertical walls.
*   **Horizontal Wall Thickness (`wallZ`):** This parameter will control the thickness of the horizontal parts (like the bottom and the lid).

**Bottom Shape:**

*   **Down Outer Radius (`downOR`):** The radius of the rounded outer bottom part of the container.
*   **Wave Count (`waveCnt`):** The number of "dents" or waves around the bottom of the container. Zero would mean a round bottom, and other values will create polygons like square (4) or hexagon (6)
*   **Wave X/Y (`waveXY`):** The amplitude of the "dents" of the waves, controlling how much it bulges in and out from the base diameter.
*   **Bottom Extra Diameter (`bottomExtra`):** An extra diameter that the bottom of the jar/bottle extends. This would control whether it flares out from the mouth or stays the same.

**Middle Shape:**

*   **Middle Height Fraction (`midHFrac`):** A fraction of the available vertical height of the container (excluding the bottom rounding and the threaded part) where the middle shaping begins (values between 0 and 1, where 1 means straight walls, 0 means more rounded body).
*  **Upper Radius Fraction (`upRadiusFrac`)**: A fraction of the available space to give the radius just below the thread. This, and the below, helps define a smooth transition of the container.
*   **Middle Radius Fraction (`midRadiusFrac`):** A fraction of the available space to give the radius of the middle part of the container.

**Threads:**

*   **Thread Count (`threadCnt`):** The number of separate threads on the cap and bottle.
*   **Twists (`twists`):** The number of full rotations of the threads.
*   **Thread Height (`threadH`):** The vertical height of the threaded part.
*   **Thread Extra Height (`threadExtraH`):** Extra height to add to the straight part of the jar/bottle below the cap. This makes the thread more robust and also takes into account manufacturing inaccuracies.
*   **Thread Cross-Section:** While I know it will be easier to modify manually, I'd like a module or function that allows me to change the cross-section of the thread, it must take the position of the point as an argument, and it should be a standard polygon, like a trapezoid that has a small negative space in it (as in the included code).
    *   **Thread XY (`threadXY`)**: This is the horizontal length of the thread cross-section.
    *  **Thread Middle Z**: Distance that is used to make sure that there's no intersection of threads during twisting, I'm assuming a simple math function can calculate this
*   **Clearance**: A gap between the cap and the jar/bottle to accommodate manufacturing inaccuracies.

**Accuracy/Other Settings:**

*   **`$fn`:** Controls the number of facets for the main body, the threads, etc.
*   **`fn2`:** Controls the number of facets for the bottom rounding.

**Vase Mode:**

*   **`vase_mode`:** A boolean flag to enable or disable vase mode for the lid. When enabled, the walls of the lid should be a single perimeter wide.

**Output:**
*   Output should include a model for the jar or bottle, and a model for the lid. The center of coordinates should be at the center of the bottom of each object (as in the example code).
*   Outputs also should include messages for debugging - volume of container (in ml), and dimensions of the lid and the jar. Also a warning should be displayed if threads are too close to each other.

I'd like the code to include a function or module that draws a bitangent line between two circles and also circle sectors on the sides (as in the example code, in `inner_bitangent_line_plus`). This is important to correctly render the transitions between the different sections of the container.

I assume you do not need the description of all helper functions (for example the ones responsible for rendering inner and outer threads). I know this might be a lot to ask. It might be beneficial to also include asserts that prevent impossible cases, like sum of the two fractions in the middle section being larger than 1, or threads that are too tight.

Let me know if you need any more details. I'm not planning on using any external libraries for now.

[Assistant]
krembox.scad:
```
/* 2023 CC-BY Jan "jprofesorek" K. */
/* v1.3 */

//─────────────────────────────────────────────────────────────────────────────
/* [wall thickness] */

// vertical wall thickness
wallXY=1.2; //.05
// horizontal wall thickness
wallZ=0.6;  //.1

//─────────────────────────────────────────────────────────────────────────────
/* [vase mode] */

// enables generating lid in vase mode; keep in mind that wallXY must be equal to perimeter extrusion width!
vase_mode=false;

//─────────────────────────────────────────────────────────────────────────────
/* [inner dimensions] */

// internal diameter
iDia=20; //.1
// internal height
iH=26.8; //.1

//─────────────────────────────────────────────────────────────────────────────
/* [thread count, number of twists, height] */

// number of threads
threadCnt=2; //1

// total number of twists of each thread
twists=0.75; //0.25

// height of the threaded parts
threadH=4; //.1

//─────────────────────────────────────────────────────────────────────────────
/* [shape of the bottom part of the jar] */

// down outer radius
downOR=4; //.1

// the number of outer dents
waveCnt=4;

// each dent is offset by sin(angle)*waveXY/2
waveXY=1.2; //.1

// this is added to the diameter of the bottom of the jar
bottomExtra=3.2; //.1

//─────────────────────────────────────────────────────────────────────────────
/* [shape of the middle part of the jar] */

// location of the "middle", as [0, 1) fraction of the available space
midHFrac=0.666666667; // [0:0.01:1]

// radius just below the thread; range [0, 1-midORfrac]
upRadiusFrac=0.5; // [0:0.01:1]

// radius in the middle; range [0, 1-upORfrac]
midRadiusFrac=0.5; // [0:0.01:1]

assert(upRadiusFrac+midRadiusFrac<=1, "Radius below the thread and in the middle ");

//─────────────────────────────────────────────────────────────────────────────
/* [accuracy] */

// vertical clearance (i.e., lose, space) between cap and jar/bottle
clearance = 0.05; // 0.01

// default accuracy; should be a multiple of waveCnt, or else artifacts may appear
$fn=72;
// accuracy of the bottom roundings
fn2=36;

//─────────────────────────────────────────────────────────────────────────────
/* [thread shape settings (mostly unavailable in customizer)] */

// extra length of the straight part of the bottle/jar just below the cap (the thread on the jar/bottle is taller than cap by the absolute value of the lowest Y offset of the thread; this is a conserative choice here)
threadExtraH=0.7; //.1

customizing_thread_must_be_done_manually="just modify the file"; // [just modify the file]

// cros-section of the thread
module threadP(){
	polygon([
		/*^*/[ -0.01, 0.7],      /*  A     */
		/*A*/[      0, 0.7],     /*  ⎹╲ B  */
		/*B*/[threadXY, 0.2],    /*  ⎹ ⎸   */
		/*C*/[threadXY,-0.2],    /*  ⎹ ⎸   */
		/*D*/[      0,-0.7],     /*  ⎹╱ C  */
	    /*^*/[ -0.01,-0.7]       /*  D     */
	    //without points marked with '^' the thread may be separated from the parts due to numeric inaccuracies
	]);
}

// An auxillary variable to print warning if the threads are too tight
threadMiddleZ=(0.7-0.2)+0.4; // <-- update this if you modify the thread!

// this must be the same as the thread horizontal dimension
threadXY=0.75;

//─────────────────────────────────────────────────────────────────────────────
// // // // // calculated values; no need to change // // // // //

midH=(wallZ+iH-threadH-threadExtraH-downOR-wallXY)*midHFrac+downOR;
upOR=sumR()*upRadiusFrac;
midOR=sumR()*midRadiusFrac;

//─────────────────────────────────────────────────────────────────────────────
// // // // // printing dimensions, approx. volume and checking the thread // // // // //

echo("Approx. volume in ml:",
	pow((iDia                     )/2,2)*PI*(                     threadH+threadExtraH)/1000 +  // thread part
	pow((iDia+bottomExtra/2       )/2,2)*PI*(iH-midH       +wallZ-threadH-threadExtraH)/1000 +  // middle askew part
	pow((iDia+bottomExtra         )/2,2)*PI*(   midH-downOR                           )/1000 +  // middle straight part
	pow((iDia+bottomExtra-downOR/2)/2,2)*PI*(        downOR-wallZ                     )/1000    // bottom rounded part
);
echo("Lid height:", threadH+wallZ);
echo("Lid diameter:", 2*(iDia/2+2*wallXY+threadXY+clearance));
echo("Lid radius:",      iDia/2+2*wallXY+threadXY+clearance);
if(waveCnt==0 || waveXY==0){
	echo("Jar/bottle diameter:",      iDia+bottomExtra          +2*wallXY);
} else if(waveCnt%2) {
	echo("Jar/bottle radius min:",   (iDia+bottomExtra-waveXY)/2 + wallXY);
	echo("Jar/bottle radius max:",   (iDia+bottomExtra+waveXY)/2 + wallXY);
} else {
	echo("Jar/bottle diameter min:", (iDia+bottomExtra-waveXY) + 2*wallXY);
	echo("Jar/bottle diameter max:", (iDia+bottomExtra+waveXY) + 2*wallXY);
}
echo("Jar/bottle height:", iH+wallZ);
echo("Total height:", iH+2*wallZ);

spaceNeededByThreads=threadCnt*twists*2*threadMiddleZ;
assert(spaceNeededByThreads < threadH, "The threads are too tight");
if((threadH-spaceNeededByThreads)/(threadCnt*twists) < 0.4)
	echo(str("Warning: the threads have only ",(threadH-spaceNeededByThreads)/(threadCnt*twists)," loose"));

//─────────────────────────────────────────────────────────────────────────────
// // // // // drawing parts // // // // //

btl();

if(true)
	translate([iDia/2+2*wallXY+threadXY,0,0]) // half of the lid
	translate([(iDia+waveXY+bottomExtra)/2+wallXY,0,0]) // half of the bottle
	translate([2,0,0]) // extra separation
	translate([0,0,wallZ+threadH])rotate([0,180,0]) // lay flat the lid
	lid();
else
	translate([0,0,wallZ+iH-threadH])
	lid();

%projection()lid();

//─────────────────────────────────────────────────────────────────────────────
// // // // // helpers // // // // //

eps=0.001;

// this is the sum of radii for roundings of line between thread part and middle part
function sumR() =
	let(
		dx=abs(bottomExtra/2)+abs(waveXY/2),
		dy=wallZ+iH-threadH-threadExtraH - midH,
		d=sqrt(pow(dx,2)+pow(dy,2))
	)
	d/(2*cos(atan(dy/dx)))
;

// "2d" slice of the part between the thread part and the bottom part
module slice2(iD2, part, cutout=false){
	shift=(cutout?(part==1?1:-1):0)*wallXY;
	type=iDia/2+upOR>iD2/2-midOR;
	side=iDia/2<=iD2/2?1:-1;

	rotate_extrude(angle=eps){
		if(part!=4)
			inner_bitangent_line_plus(
				[iDia/2+upOR*side+wallXY/2,wallZ+iH-threadH-threadExtraH], upOR+shift,
				[iD2/2-midOR*side+wallXY/2,midH                         ], midOR-shift,
				wallXY, type, part
			);
		if(part==4)
			hull(){
				translate([iD2/2+wallXY/2,midH])
					circle(d=wallXY);
				translate([iD2/2+wallXY/2,downOR])
					circle(d=wallXY);
			}
	}
}

// "2d" slice of the bottom part outer silethoue
module slice3a(iDia){
	rotate_extrude(angle=eps)
		hull(){
			translate([iDia/2-downOR+wallXY,downOR])
				difference(){
					circle (downOR,$fn=fn2);
					translate([-downOR-eps,-downOR-eps])
						square([downOR+eps, 2*(downOR+eps)]);
				}
			translate([iDia/2-downOR/2,0])
				square([wallXY,wallZ]);
			square([wallXY,wallZ]);
		}
}

// "2d" slice of the bottom part inner silethoue
module slice3b(iDia){
	rotate_extrude(angle=eps)
		hull(){
			translate([0,wallZ])
				square([wallXY,iH]);
			translate([iDia/2-downOR+wallXY,iH])
				square([downOR-wallXY,1]);
			translate([iDia/2-downOR+wallXY,downOR-wallXY+wallZ])
				difference(){
					circle (downOR-wallXY,$fn=fn2);
					translate([-downOR,-downOR])
						square([downOR, 2*downOR]);
				}
		}
}

// // // // // lid // // // // //

module lid() if(vase_mode) lid_vase_mode(); else lid_normal();

module lid_normal(){
	difference(){
		for(i=[0:threadCnt-1])
			rotate([0,0,i*360/threadCnt])
				threadO(threadR=iDia/2+wallXY+clearance, threadH=threadH, twists=twists, step=360/$fn, threadThickness=threadXY);
		translate([0,0,threadH+wallZ/2])
			cylinder(r=iDia/2+wallXY+threadXY+clearance+1,h=iH);
	}

	rotate_extrude(){
		translate([iDia/2+wallXY+threadXY+clearance,0])
			square([wallXY,wallZ+threadH]);
		translate([0,threadH])
			square([iDia/2+wallXY+threadXY+clearance,wallZ]);
	}

}

module lid_vase_mode(){
	difference(){
		eps=1e-10;
		cylinder(r=iDia/2+2*wallXY+threadXY+clearance,h=wallZ+threadH);
		for(i=[0:threadCnt-1])
			translate([0,0,-eps])
				rotate([0,0,i*360/threadCnt])
					threadO(threadR=iDia/2+2*wallXY+clearance, threadH=threadH+eps, twists=twists, step=360/$fn, threadThickness=threadXY);
		rotate_extrude()
			translate([iDia/2+2*wallXY+threadXY+clearance,0])
				square([1,wallZ+threadH+1]);
	}

	rotate_extrude()
		translate([0,threadH])
			square([iDia/2+2*wallXY+threadXY+clearance,wallZ]);
}

// // // // // jar // // // // //

module btl(){
	// thread
	for(i=[0:threadCnt-1])
		rotate([0,0,i*360/threadCnt])
			translate([0,0,wallZ+iH-threadH])
				threadI(threadR=iDia/2+wallXY, threadH=threadH, twists=twists, step=360/$fn);

	// wall at thread level
	rotate_extrude(){
		translate([iDia/2,wallZ+iH-threadH-threadExtraH]){
			square([wallXY,threadH+threadExtraH]);
			// this prevents prusa-slicer into splicing the model in two parts
			translate([wallXY/2,0,0])
				circle(d=wallXY);
		}
	}

	// wall between thread and bottom
	for(i=[0:360/$fn:360-eps]){
		for(part=[1:4])
			difference(){
				hull(){
					rotate([0,0,i])
						slice2(iDia+bottomExtra+waveXY*sin(waveCnt*i),          part);
					rotate([0,0,i+360/$fn])
						slice2(iDia+bottomExtra+waveXY*sin(waveCnt*(i+360/$fn)),part);
				}
				eps2=1e-9;
				if(part==1||part==3)
				hull(){
					rotate([0,0,i-eps])
						slice2(iDia+bottomExtra+waveXY*sin(waveCnt*(i+eps2        )),part,true);
					rotate([0,0,i+eps+360/$fn])
						slice2(iDia+bottomExtra+waveXY*sin(waveCnt*(i-eps2+360/$fn)),part,true);
				}
			}
	}

	// bottom
	for(i=[0:360/$fn:360-eps]){
		difference(){
			hull(){
				rotate([0,0,i])
					slice3a(iDia+bottomExtra+waveXY*sin(waveCnt*i));
				rotate([0,0,i+360/$fn])
					slice3a(iDia+bottomExtra+waveXY*sin(waveCnt*(i+360/$fn)));
			}
			hull(){
				rotate([0,0,i-eps])
					slice3b(iDia+bottomExtra+waveXY*sin(waveCnt*i));
				rotate([0,0,i+360/$fn+eps])
					slice3b(iDia+bottomExtra+waveXY*sin(waveCnt*(i+360/$fn)));
			}
			rotate_extrude()
				translate([0,downOR])
					square([iDia+bottomExtra+downOR+wallXY,iDia+downOR+wallZ]);
		}
	}
}

// // // // // thread // // // // //

// thread-generating routine for both inner and outer thread
module thread(threadR=6, threadH=4, twists=2, step=10, outer=false, threadThickness=0.5){
	eps=1e-10;
	eps2=1e-3;
	maxPos=(360-eps)*twists;

	for(pos=[0:step:maxPos]){
		hull(){
			translate([0,0,threadH*pos/maxPos])
			rotate([0,0,pos-eps2])
			mirror([0,1,0])
			rotate([90,0,0])
			translate([threadR,0])
			linear_extrude(height=eps)
			if(outer){
				mirror([1,0,0])
				translate([-threadThickness,0,0])
				threadP();
			} else
				threadP();

			translate([0,0,threadH*(pos+step)/maxPos])
			rotate([0,0,pos+eps2+step])
			rotate([90,0,0])
			translate([threadR,0])
			linear_extrude(height=eps)
			if(outer){
				mirror([1,0,0])
				translate([-threadThickness,0,0])
				threadP();
			} else
				threadP();
		}
	}
}

// inner thread
module threadI(threadR=6, threadH=4, twists=2, step=10){
	eps=1e-10;
	difference (){
		thread(threadR, threadH, twists, step);
		translate([0,0,threadH])
		cylinder(r=2*threadR, h=threadH);
	}
}

// outer thread
module threadO(threadR=6, threadH=4, twists=2, step=10, threadThickness=0.5){
	eps=1e-10;
	difference (){
		thread(threadR, threadH, twists, step, true, threadThickness);
		translate([0,0,-threadH])
		cylinder(r=2*threadR, h=threadH);
	}
}

// // // // // bitangent to two circles // // // // //

// draws a segment bitangent to two circles and parts of the circles from the segment to vetrical line
module inner_bitangent_line_plus(center1,r1, center2,r2, thickness, theOtherOne=false, part){
	if(center2.x >= center1.x){
		if(center2.y >= center1.y)
			internal([ center1.x, center1.y],r1, [ center2.x, center2.y],r2, thickness, theOtherOne, part);
		else
			mirror([0,1])
			internal([ center1.x,-center1.y],r1, [ center2.x,-center2.y],r2, thickness, theOtherOne, part);
	} else {
		mirror([1,0])
		if(center2.y >= center1.y)
			internal([-center1.x, center1.y],r1, [-center2.x, center2.y],r2, thickness, theOtherOne, part);
		else
			mirror([0,1])
			internal([-center1.x,-center1.y],r1, [-center2.x,-center2.y],r2, thickness, theOtherOne, part);
	}

	module internal(center1,r1, center2,r2, thickness, type, part){
		// this assumes that center of the C2 is NE of C1

		x = center2.x-center1.x;
		y = center2.y-center1.y;

		s=(type?-1:1);

		dist=sqrt(pow(x,2)+pow(y,2));
		angle=asin(y/dist)-asin((r1+r2)/dist)*s;

		x2_=sqrt(pow(dist,2)-pow(r1+r2,2));

		assert(r1+r2<=dist, "Inner bitangent of intersecting circles requested");

		// // this is the same:
		//translate([x2_,s*(r1+r2)]) circle(r2);
		//rotate([0,0,-angle])translate([x,y]) circle(r2);

		//%translate(center1)circle(r1);
		//%translate(center2)circle(r2);

		// line:
		if(part==2)
		translate(center1)
			rotate([0,0,angle])
				hull(){
					translate([  0,s*r1]) circle(d=thickness);
					translate([x2_,s*r1]) circle(d=thickness);
				}

		// arc part of C2
		if(part==1)
			translate(center2)
				union(){
					translate([-thickness/2-r2,-eps])
						square([thickness, eps]);
					difference(){
						circle(r2+thickness/2);
						circle(r2-thickness/2);
						// cuts rotated side of C2
						rotate([0,0,angle])
							translate([-r2-thickness,-r2-thickness])
								square([r2+thickness,2*(r2+thickness)]);
						// cuts top of C2
						translate([-r2-thickness,0])
							square([2*(r2+thickness), r2+thickness]);
					}
				}

		// arc part of C1
		if(part==3)
			translate(center1)
				union(){
					translate([-thickness/2+r1,0])
						square([thickness, eps]);
					difference(){
						circle(r1+thickness/2);
						circle(r1-thickness/2);
						// cuts rotated side of C1
						rotate([0,0,angle])
							translate([0,-r1-thickness])
								square([r1+thickness,2*(r1+thickness)]);
						// cuts bottom of C1
						translate([-r1-thickness,-r1-thickness])
							square([2*(r1+thickness), r1+thickness]);
					}
				}
	}
}

```


[User]
Hi! I'm looking to design a replacement head for my Einhell GC-CT 18/24 grass trimmer. The original head uses a single plastic blade, but I want to create a multi-blade version. I have some specific dimensions and would like to be able to easily customize it using OpenSCAD.

Here's what I need:

**Core:**

*   A central cylinder, which is basically the mounting point for the whole assembly. I need to specify the `core_width` and `core_height` – think of this as the bit that slides onto the metal rod of the trimmer and that has a pin to secure it.
*   Also, I need a `mounting_plate_height`, which is a small flat cylinder on top of the core to hold the screw.

**Blade Support:**

*   The blades should be mounted on a support cylinder. This support cylinder needs an `support_angle` that defines the angle to attach to the core.
*   The cylinder that holds the blades should be defined with a `support_width`.

**Blades:**

*   The blades themselves need to have several parameters: `blade_height` (the height at the highest point), `blade_width` (maximum width), `blade_mid_width` (width at 80% of length), and `blade_front_width` (width at the very tip).
*   The blade needs to have a specified `blade_length` and an `blade_angle` (angle of the blade edge relative to horizontal).
*   Finally I need to specify how many blades I want using `blade_count`. I'd like to start with 3 blades, but it should be easy to change.

**Optional Shield:**

*   I would like to add an option to include a shield to keep grass out of the motor housing. If this option is enabled (`enable_shield=true`), then:
*   The shield is cylindrical and needs an `shield_diameter` (inner diameter) , `shield_height` (height), and `shield_thickness` (wall thickness).
*  The shield needs a cutout for the riser on the trimmer, so I need to be able to specify a `shield_cutout_height`.

**Mounting Pin:**

*   The design also needs a module to create the mounting pin with its screw. I need to be able to set a `height` for it.

Can you generate the necessary OpenSCAD code? I think this would need to be a single file. I'm not using any special libraries right now.

[Assistant]
triblade.scad:
```
// Einhell Trimmer Replacement Head - Multiblade
// - a replacement head for Einhell battery-based grass trimmers
// replaces the original single-blade head with a head with support for multiple blades
//
// licensed under CC-BY-SA 4.0
// by Jakob Meier <comcloudway@ccw.icu>

// width of the core, which holds the mounting pin
core_width=20; // default: 20
// height of the core
// should be the same height as the metal pin on your trimmer
core_height=15; // default: 15
// height of plate, which holds the screw in place
mounting_plate_height=3; // default: 3

// angle of the support cylinder,
// which attaches the blade-cylinder to the core
support_angle=20; // default: 20
// width of the cylinder on which the blades are mounted
support_width=30; // default: 30

// height of the blade (at the highest spot)
blade_height=3; // default: 3
// maximum blade width
blade_width=20; // default: 20
// blade width at 80%
blade_mid_width=14; // default: 14
// blade width at front
blade_front_width=8; // default: 8
// length of the blade
// (plus/minus a couple of millimeters, as the blades are slightly recessed)
// max. about 10
blade_length=75; // default: 75
// angle of the blade edge
blade_angle=20; // default: 20
// amount of blades to add
// use an even number for the best results,
// min: 2
blade_count=3; // default: 3

// the shield keeps grass out of the motor housing
// it is made to fit around the raised plastic on the trimmer
// NOTE: when set to true, the balde_length will decrease
enable_shield=false;
// inner diameter of the wall
// (has to clear the trimmer motor-rod shield)
shield_diameter=35; // default: 35
// height of the wall
// (probably the same as the core_height)
shield_height=core_height + mounting_plate_height;
// thickness of the wall (lower half)
shield_thickness=4; // default: 4
// size of the plastic riser on the trimmer
// should be at least 5, to make sure you clear it
shield_cutout_height=8; // default: 8

// basic model of the mounting screw
module pin(height) {
	off=0.5;

	circ=10+off;
	r=circ/2;
	core_width=8+off;
	screw=6+off;
	head=10+off;

	union() {
		difference() {
			cylinder(r=r, h=height);

			translate([0,r+core_width/2,height/2]) cube([10,10,height+2], center=true);
			translate([0,-r - core_width/2,height/2]) cube([10,10,height+2], center=true);
		}
		translate([0,0,height]) cylinder(r=screw/2, h=3);
		translate([0,0,height+3]) cylinder(r2=head/2, r1=screw/2, h=2);
	}
}

// custom made blade object
module blade() {
	width=10;
	max_height=3;
	min_height=1;
	polyhedron(
			points=[
			[blade_width/2, 0, 0],
			[-blade_width/2, 0, 0],
			[-blade_mid_width/2, blade_length*0.8, 0],
			[-blade_front_width/2, blade_length, 0],
			[blade_front_width/2, blade_length, 0],
			[blade_mid_width/2, blade_length*0.8, 0],
			[blade_width/2, 0, blade_height],
			[-blade_width/2, 0, blade_height],
			[-blade_mid_width/2 * sin(blade_angle), blade_length*0.6, blade_height],
			[-blade_front_width/2 * sin(blade_angle), blade_length*0.9, blade_height],
			[blade_front_width/2 * sin(blade_angle), blade_length*0.9, blade_height],
			[blade_mid_width/2 * sin(blade_angle), blade_length*0.6, blade_height],
			],
			faces=[
			[5,2,1,0],
			[5,4,3,2],
			[0,1,7,6],
			[1,2,7],
			[2,8,7],
			[2,3,9,8],
			[3,4,10,9],
			[4,5,11,10],
			[8,9,10,11],
			[5,0,6,11],
			[6,7,8,11]
			]
				);
}

// the model itself
module triblade() {
	difference()
	{
		union() {
			// cylinder to which the blades are attached
			cylinder(r=support_width/2, h=blade_height);

			// supporting cylinder
			translate([0,0,mounting_plate_height]) cylinder(r1=support_width/2, r2=core_width/2, h=core_height*sin(support_angle));
			// core cyclinder
			cylinder(r=core_width/2, h=core_height+mounting_plate_height);

			// the blades
			for (rad = [360/blade_count:360/blade_count:360]) {
				rotate([0,0,rad]) translate([0,-core_width/4 + support_width/2,0]) blade();
			}

			if (enable_shield) {
				difference() {
					cylinder(r=shield_diameter/2+shield_thickness, h=shield_height);
					translate([0,0,shield_height-shield_cutout_height]) cylinder(r=shield_diameter/2, h=shield_cutout_height+1);
				}
			}
		}

		// MINUS

		// core rod used to fix triblade to trimmer head
		translate([0,0,core_height+mounting_plate_height+2]) rotate([180,0,0]) pin(core_height+1);
	}
}

triblade();

```


[User]
I need a parametric design for a dash blank, specifically for a Volkswagen T5 Transporter, that can be customized to hold various electrical connectors. I want to be able to adjust the size of the faceplate, add a decorative lip around the edge, and choose from different cutout shapes (circle, square, or squircle) with adjustable dimensions. The design should also include mounting tabs on the back for securing it in the dash.

Here's a more detailed breakdown of the features I need:

*   **Faceplate:**
    *   Adjustable width and height.
    *   A lip around the edge that can have its overhang and height adjusted, making it look nicer.
*   **Cutouts:**
    *   Option to have no cutout.
    *   Option to have a circular cutout with adjustable radius.
    *   Option to have a square cutout with adjustable width and height.
    *   Option to have a "squircle" cutout (a rounded square) with an adjustable radius (which will determine both the base radius and the size of the rounded corners), and adjustable width and height.
*   **Mounting Tabs:**
    *   Tabs on the back with a slight angle for sliding into the dash, and a clasp for retaining it.
    *   The inset distance from the edge of the tab, its height, width, thickness, and the angles of the slide and clasp should all be adjustable.
*   **General:**
    *   I’d like to be able to adjust a fillet radius for the inner edges of the design, this should be a general setting that applies to all fillets within the model.
    *   The overall depth of the blank and how much it protrudes from the dash can be adjusted.
    *   I need to be able to tweak all of these parameters in the OpenSCAD customizer.

I'm envisioning something like the existing code I have, but I need to be able to adjust all of these things parametrically so that I can fit different connectors.

I think that should cover everything. Thanks!

[Assistant]
dash_blank.scad:
```
// VW Dash blank
// by Andrew Vaughan
//
// inspired by, and measurements taken from, Kyle Miller's work - https://www.thingiverse.com/thing:276092

/* [Face plate:] */
	Faceplate_width=32;
	Faceplate_height=32;
	Faceplate_lip_overhang=1; //[0:0.25:1.5]
	Faceplate_lip_height=0.2; //[0:0.05:0.4]

/* [Cutouts:] */
	Cutout_shape=1; // [0:None, 1:Circle, 2:Square, 3:Squircle]
// Only applicable for Circle and Squircle
	Cutout_radius=10;
// Only applicable for Square and Squircle
	Cutout_width=15;
// Only applicable for Square and Squircle
	Cutout_height=10;

/* [General:] */

/* [Hidden] */

// Face plate lip
	Lip_height=2;
	Lip_bottom_width=1.2;
	Lip_top_inset=0.2;

// Tabs
	Tab_inset_from_edge=10;
	Tab_height=5.5;
	Tab_width=2;
	Tab_thickness=1.4;
	Slide_angle=25;
	Clasp_angle=45;

	Base=[Faceplate_width,Faceplate_height,2];
	Wall=1;
	Fillet_radius=0.3;
	Center=[Base.x-7,Base.y-4,22];

	$fn=90;

// Generating the model

difference() {
	mirror_copy([0,1,0]) {
		mirror_copy([1,0,0]) {
			Base();
			Center();
			Tab();
		}
	}
	CutOut();
}

module CutOut () {
	translate([0,0,-1]) {
		if(Cutout_shape==1) { // Circle
			cylinder(h=Center.z+2, r=Cutout_radius);
		}
		if(Cutout_shape==2) { // Square
			translate([-Cutout_width/2,-Cutout_height/2]) cube([Cutout_width,Cutout_height,Center.z+2]);
		}
		if(Cutout_shape==3) { // Squircle
			R=Cutout_radius < min(Cutout_width,Cutout_height)/2 ? Cutout_radius : min(Cutout_width,Cutout_height)/2-0.1;
			translate([-Cutout_width/2,-Cutout_height/2]) {
				linear_extrude(Center.z+2) {
					minkowski() {
						translate([R,R]) circle(r=R);
						square([Cutout_width-R*2,Cutout_height-R*2]);
					}
				}
			}
		}
	}
}

module Tab () {
translate([Base.x/2-Tab_inset_from_edge-Tab_width,Center.y/2,Center.z]) //inset_from_edge
rotate([0,90,0])
	linear_extrude(Tab_width) {
		polygon([[0,0],[Tab_thickness*tan(90-Slide_angle),Tab_thickness],[Tab_height-Tab_thickness*tan(Clasp_angle),Tab_thickness],[Tab_height,0],[Tab_height+3,0],[Tab_height+3,Tab_thickness],[Center.z,Tab_thickness],[Center.z,0]]);
	}
}

module Center () {
	difference() {
		cube([Center.x/2,Center.y/2,Center.z]);
		translate([-2,-2,Base.z]) FilletCutOut([Center.x/2-Wall+2,Center.y/2-Wall+2,Center.z]);
		translate([Center.x/2-Wall-Fillet_radius,0,Center.z/2]) cube([Wall+Fillet_radius,Center.y/2,Center.z]);
		translate([Center.x/2,0,Center.z]) rotate([-90,0,0]) cylinder(h=Center.y,r=4,$fn=4);
	}
}

module Base () {
	minkowski() {
		cylinder(h=Faceplate_lip_height, r=Faceplate_lip_overhang);
		cube([Base.x/2,Base.y/2,Faceplate_lip_height]);
	}

	difference() {
		union() {
			// Base
			cube([Base.x/2,Base.y/2,Base.z]);
			cube([Base.x/2-Lip_bottom_width,Base.y/2-Lip_bottom_width,Base.z+Lip_height]);

			// Lip Profile
			Lip(Base.x/2,Base.y/2);
			mirror([0,1,0]) rotate([0,0,-90]) Lip(Base.y/2,Base.x/2);
		}
		translate([-2,-2,Base.z]) FilletCutOut ([Base.x/2-Lip_bottom_width+2,Base.y/2-Lip_bottom_width+2,10]);
	}
}

module Lip (x=16, y=16) {
	translate([0,y-Lip_bottom_width]) {
		// Main
		hull() {
			cube([x,Lip_bottom_width,Base.z]);
			cube([x-Lip_top_inset,Lip_bottom_width-Lip_top_inset,Base.z+Lip_height]);
		}
	}
}

module mirror_copy (v=[1,0,0]) {
	children();
	mirror(v) children();
}

module FilletCutOut (array=[10,10,10], r=Fillet_radius) {
	hull() {
		translate([0,0,r]) cube([array.x,array.y,array.z-r]);
		translate([r,r,0]) cube([array.x-r*2,array.y-r*2,array.z]);
	}
}

```


[User]
I'd like to design a customizable container with a threaded lid. I need the container and lid to be parametric, so I can adjust the dimensions and thicknesses. Specifically:

**Core Dimensions:**
*   I want to be able to set the inner diameter of the container, and the wall thickness will be added to get the outer diameter, with a minimum diameter of 8mm.
*   I also need to set the inner height of the container, and the wall thickness will also be added to get the outer height. The height should also have a minimum based on the thread height and bottom thickness.
*   I need to be able to specify an outside chamfer for the bottom of the container as a percentage of the diameter, and set a similar percentage-based inside chamfer. I should be able to set both to 0 for flat bottoms.

**Thickness Control:**
*   I need to be able to set the wall thickness, or have it default based on the container diameter. Specifically, I'd like a default of 2mm up to size 60, 2.5mm from 61-100, and 3mm for larger sizes. If a user provides a specific value, use that; otherwise calculate based on diameter.
*   I also want to set the container bottom thickness, with a default to use the wall thickness. Same for the lid top thickness, defaulting to the wall thickness as well.

**Thread and Fit:**
* I need to calculate thread height automatically based on diameter. It should be 1/6th of the diameter for diameters over 20mm and 20/6 for smaller diameters.
*   There needs to be a backlash or clearance between the lid and container threads, defaulting to 1/4 of the wall thickness, but also configurable. The backlash must not go below 0.2mm.
*   Use a high resolution (as close to 100 segments as reasonable).

**Knurling:**

*   I'd like the option to add a knurled ring at the bottom of the container and at the top of the lid. These should be togglable with a yes/no option.
*   I need to be able to control the thickness of the knurled ring, and it should not extend beyond the height of the container (or lid), whatever that may be.
*   I should also be able to adjust the size of the knurling pattern, controlling the width and height of each knurl.

**Other:**
*   I need to generate separate parts for container and lid in a way that allows the thread to be cut in both.

The code should use the math functions and standard primitives in OpenSCAD itself and use no libraries other than the standard one. Can you generate the scad file(s) for this?

[Assistant]
customContainerRemix.scad:
```

/* [Dimensions] */

// inner diameter (for outer dimension add 2x wall thickness) - minimum = 8.0mm
diameter=50.0;

// inner height (for outer dimension add 2x wall thickness)
height=20.0;

// Container outside chamfer in percent of diameter. Use 0 for a flat outside bottom - default is 5%
outside_chamfer=2.0;

// Container inside chamfer in percent of diameter. Use 0 for a flat inner bottom - default is 2.5%
inside_chamfer=0.5;

/* [Thickness] */

// default value -1 means 2mm up to size 60, 2.5mm from 61 - 100. 3mm for larger.
wall_thickness=-1;

//thickness off container bottom. If you use the solid container model use the same value as setup in the slicer. default: -1 (use wall thickness)
container_bottom_thick=-1;

//thickness off lid top. Lid is always normal printing, so nothing special here, except reset the slicer to normal settings. default: -1 (use wall thickness)
lid_top_thick=-1;

/* [Expert] */

// to show? Only create once! You will get always all parts!
part = "lidCon_"; // [container_:Container,lidCon_:height adjustable lid]

// default value -1 means take 1/4 of Wall Thickness
backlash=-1;

quality=100; // [80:good, 100:high, 120:very high,150:best]

/* [Knurled ring] */
//Generate a knurled grip ring at bottom container
ring_bottom = 1;//[1:yes,0:no]

//Generate a knurled grip ring at top (lid) container
ring_top = 1;//[1:yes,0:no]

//Grip ring thickness
ring_thickness = 20;

//Knurling pattern size
knurle_size = 5;//[2:15]

/* [Hidden] */

// ensure some minimal values
function diameter()=max(8,diameter);

function wall_thickness()=(
	wall_thickness!=-1 ? max(1.0,wall_thickness) : (
	diameter() <= 20 ? 1.5 : (
	diameter() <= 60 ? 2.0 : (
	diameter() <= 100 ? 2.5 :
   3.0))));

bottom_thick=(container_bottom_thick<0?wall_thickness()/-container_bottom_thick:container_bottom_thick);
top_thick=(lid_top_thick<0?wall_thickness()/-lid_top_thick:lid_top_thick);

function backlash()=backlash==-1?wall_thickness()/4:max(0.2,backlash);
thread_height=(diameter()>20?diameter()/6:20/6);

function height()=max(2*(thread_height+bottom_thick),height);

$fn=quality;

lid_r=diameter()/2+wall_thickness()/2+backlash();
lid_r0=(diameter()>=20?lid_r:20/2+wall_thickness()/2+backlash()); // virtual radius, for diameter() < 20

echo ("Start");

difference(){
intersection()
{
	offset=(part=="both"?diameter()*.6+2*wall_thickness():0);
	union()
	{
		if(part=="container_")
            translate([0,-offset,0])
                container(diameter(),height());
        else {
            container_2(diameter(),height());
        }

	}
}
//translate([0,-250/2,-1])cube([250,250,250]);
}

module lid(r,r0,h)
union()
{

	intersection()
	{
		translate([0,0,wall_thickness()])
		thread(r,thread_height,outer=true);

		cylinder(r=r+wall_thickness()/2,h=h);
	}

	difference()
	{
		a=1.05;
        b=1.1;
		ra=a*r+b*wall_thickness();
        ra0=a*r0+b*wall_thickness();
        h1=h+top_thick;

        if(part=="lid_right_knurled_")
        knurled(ra,ra0,h1,[1]);
        else if(part=="lid_left_knurled_")
        knurled(ra,ra0,h1,[-1]);
        else if(part=="lid_vertical_knurled_")
        knurled(ra,ra0,h1,[0]);
        else if(part=="lid_double_knurled_")
        knurled(ra,ra0,h1,[-1,1]);
        else
        cylinder(r=ra,h=h1);

		translate([0,0,-.1])
		cylinder(r=r+wall_thickness()/2,h=h+.1);
	}
}

module container(r,h)
union()
{
	difference()
	{
		union()
		{
			container_hull(diameter()/2+wall_thickness(),height()+bottom_thick,outside_chamfer,[wall_thickness()/2,thread_height+wall_thickness()/2]);

			translate([0,0,height()-thread_height-wall_thickness()/2+bottom_thick])
			thread(diameter()/2+wall_thickness(),thread_height,outer=false);

            if(ring_bottom==1){
                translate([0,0,(diameter()/2+wall_thickness())*outside_chamfer/50])knurled_cyl(min(ring_thickness,height()-thread_height), diameter()+2*wall_thickness()+1.6, knurle_size, knurle_size, 1.5, min(4.0,ring_thickness-4), 0);
                }

		}

			translate([0,0,bottom_thick])

		container_hull(diameter()/2,height()+bottom_thick,inside_chamfer);
	}

}

module container_2(r,h)
union()
{
	difference()
	{
		union()
		{

            container_hull_2(
                diameter()/2+wall_thickness(),
                height()+bottom_thick+thread_height,
                outside_chamfer,
                [wall_thickness()*1.1,
                thread_height+wall_thickness()*2+1.75],0.8,1.25);

            if(ring_top==1){
                translate([0,0,(diameter()/2+wall_thickness())*outside_chamfer/50])knurled_cyl(

                min(ring_thickness,height()-thread_height+bottom_thick*1.6)

                , diameter()+2*wall_thickness()+1.6, knurle_size, knurle_size, 1.5, min(4.0,ring_thickness-4), 0);
            }

		}

        translate([0,0,bottom_thick])
        container_hull_2(
                diameter()/2,
                height()+bottom_thick/4+thread_height,
                inside_chamfer,
                [wall_thickness()*1.1,
                thread_height+wall_thickness()*2+1.75],1.1,1.25);
    }

    translate([0,0,h])
    intersection()
	{
		translate([0,0,wall_thickness()])
            thread(lid_r,thread_height,outer=true);
		cylinder(r=lid_r+wall_thickness()/2,h=thread_height);
	}

}

module container_hull(r,h,chamfer,thread_notch=[0,0])
{
	xn=thread_notch[0];
	yn=thread_notch[1];

	x1=r*(50-chamfer)/50;
    x2=r;
    x3=r-xn;
    y1=r*chamfer/50;
    y2=h;
    y3=h-yn;
    y4=h-yn+xn;

    rotate_extrude(convexity=10)
        polygon([[0,0],[x1,0],[x2,y1],
    [x2,y3],
    [x3,y4],
    [x3,y2],
    [0,y2]]);
}

module container_hull_2(r,h,chamfer,thread_notch=[0,0],a,b)
{
	xn=thread_notch[0];
	yn=thread_notch[1];

    //thread_height

    rotate_extrude(convexity=10)
        polygon([
            [0,0],
            [r*(50-chamfer)/50,0],
            [r,r*chamfer/50],
            [r,h-yn],
            [r+xn*a,h-yn+xn*1.5],
            [r+xn*a,h-1],
            [r+xn*a-0.25,h],
            [0,h]

    ]);
}

module thread(r,h,outer=false)
{
    $fn=100;
	linear_extrude(height=h,twist=-250,convexity=10)
	for(a=[0:360/2:359])
	rotate([0,0,a])
	if(outer)
	{
		difference()
		{
			translate([0,-r])
			square(2*r);

			offset=.8;
			translate([r*(1-1/offset),0])
			circle(r=1/offset*r);
		}
	}
	else
	{
		offset=0.8;
		translate([(1-offset)*r,0,0])
            circle(r=r*offset);
	}
}

module knurled_cyl(chg, cod, cwd, csh, cdp, fsh, smt)
{
    cord=(cod+cdp+cdp*smt/100)/2;
    cird=cord-cdp;
    cfn=round(2*cird*PI/cwd);
    clf=360/cfn;
    crn=ceil(chg/csh);

    intersection()
    {
        shape(fsh, cird, cord-cdp*smt/100, cfn*4, chg);

        translate([0,0,-(crn*csh-chg)/2])
          knurled_finish(cord, cird, clf, csh, cfn, crn);
    }
}

module shape(hsh, ird, ord, fn4, hg)
{
        union()
        {
            cylinder(h=hsh, r1=ird, r2=ord, $fn=fn4, center=false);

            translate([0,0,hsh-0.002])
              cylinder(h=hg-2*hsh+0.004, r=ord, $fn=fn4, center=false);

            translate([0,0,hg-hsh])
              cylinder(h=hsh, r1=ord, r2=ird, $fn=fn4, center=false);
        }

}

module knurled_finish(ord, ird, lf, sh, fn, rn)
{
    for(j=[0:rn-1])

    {
        h0=sh*j;
        h1=sh*(j+1/2);
        h2=sh*(j+1);

        for(i=[0:fn-1])
        {
            lf0=lf*i;
            lf1=lf*(i+1/2);
            lf2=lf*(i+1);
            polyhedron(
                points=[
                     [ 0,0,h0],
                     [ ord*cos(lf0), ord*sin(lf0), h0],
                     [ ird*cos(lf1), ird*sin(lf1), h0],
                     [ ord*cos(lf2), ord*sin(lf2), h0],

                     [ ird*cos(lf0), ird*sin(lf0), h1],
                     [ ord*cos(lf1), ord*sin(lf1), h1],
                     [ ird*cos(lf2), ird*sin(lf2), h1],

                     [ 0,0,h2],
                     [ ord*cos(lf0), ord*sin(lf0), h2],
                     [ ird*cos(lf1), ird*sin(lf1), h2],
                     [ ord*cos(lf2), ord*sin(lf2), h2]
                    ],
                faces=[
                     [0,1,2],[2,3,0],
                     [1,0,4],[4,0,7],[7,8,4],
                     [8,7,9],[10,9,7],
                     [10,7,6],[6,7,0],[3,6,0],
                     [2,1,4],[3,2,6],[10,6,9],[8,9,4],
                     [4,5,2],[2,5,6],[6,5,9],[9,5,4]
                    ],
                convexity=5);
         }
    }
}

    k_cyl_hg=10;   // Knurled cylinder height
    k_cyl_od=22.5;   // Knurled cylinder outer* diameter

    //knurled_cyl(k_cyl_hg, k_cyl_od, knurl_wd, knurl_hg, knurl_dp, e_smooth, s_smooth);

```


[User]
I'm looking to design a parametric over-the-door hook in OpenSCAD. I've seen a few examples, but I need one that's easily customizable for different door thicknesses and hook depths.

Here's what I'm envisioning:

The design should have a main body that hooks over the door and a downward extending portion that is shaped like a hook. The main body should consist of two portions: a front section and a back section, with the back section being the portion that rests against the back side of the door, and the front section being the portion visible from the other side. I'd like to control the following parameters:

*   `door_width`: The thickness of the door the hook will be placed on.
*   `front_width`: The width of the front portion of the hook.
*   `back_width`: The width of the back portion of the hook.

The hook portion itself should have a more complex profile than just a straight extension. I'm thinking of an angled section moving downwards, followed by a slight inward hook. It might be best if this profile could be defined as a 2D polygon which would then be extruded. I'm looking to use these specific points to create the 2D shape: `[0.00,0.00]`, `[-2.00,0.00]`, `[-18.00,9.00]`, `[-18.00,14.00]`, `[-14.00,14.00]`, `[-14.00,12.00]`, `[-2.00,5.00]`, `[-2.00,58.00]`, `[door_width+2.00,58.00]`, `[door_width+2.00,46.00]`, `[door_width,46.00]`, `[door_width,56.00]`, and `[0.00,56.00]`. The order in which the points are used in the polygon should also be made clear using a list of indices for that point list: `[0,1,2,3,4,5,6,7,8,9,10,11,12]`.

On the top, the part that sits over the door, should have a portion that's extruded along a particular cross-section for the door hanging part. This cross-section should have the following points: `[front_width/2,-18]`, `[-front_width/2,-18]`, `[back_width/2,door_width+2]`, `[-back_width/2,door_width+2]` with indices `[1,3,2,0]`. The length of this extrusion should be approximately the length of the long vertical segment of the hook body.

Could you generate the necessary OpenSCAD file(s) for this? I’d like the file to use the `linear_extrude` and `polygon` primitives. I don't need anything super fancy, just something functional that I can adjust easily. I'd prefer if everything was in a single file for simplicity.

[Assistant]
parametric_door_hook.scad:
```
//CS_Lab 2023
//remix from https://www.thingiverse.com/thing:1688512

door_width = 30;
front_width = 8;
back_width = 25;

intersection() {
    translate([0,0,-(front_width+back_width)/2])
        linear_extrude (front_width+back_width)
            polygon([
                [0.00,0.00]
                ,[-2.00,0.00]
                ,[-18.00,9.00]
                ,[-18.00,14.00]
                ,[-14.00,14.00]
                ,[-14.00,12.00]
                ,[-2.00,5.00]
                ,[-2.00,58.00]
                ,[door_width+2.00,58.00]
                ,[door_width+2.00,46.00]
                ,[door_width,46.00]
                ,[door_width,56.00]
                ,[0.00,56.00]],
                [[0,1,2,3,4,5,6,7,8,9,10,11,12]
                ]);

translate ([0,58,0])
    rotate([0,90,-90])
        linear_extrude (58)
            polygon([
                [front_width/2,-18]
                ,[-front_width/2,-18]
                ,[back_width/2,door_width+2]
                ,[-back_width/2,door_width+2]]
                ,[[1,3,2,0]]);
};
```


[User]
Hey, I'm looking to create a parametric design for a curved paver mold using OpenSCAD. I've got some specific requirements and would really appreciate it if you could help me generate the necessary `.scad` files.

The core idea is to have a mold that produces a curved paver, and I want to control the paver's width using a few different methods: either by specifying the exact width along the curve, by defining the angle it covers, or by setting the number of pavers that would make up a full 360-degree circle. So, I'll need a parameter to switch between these methods, and the others should be ignored depending on which is chosen.

Here are the key dimensions I need to be able to adjust:

*   **Paver Width**: As mentioned, this should be controlled by one of three methods: an explicit width, angle, or number of pavers.
    *   Explicit width along the curve (like 180mm).
    *   Angle of the paver (e.g., 20 degrees).
    *   Number of pavers that form a full circle (e.g., 8).
*   **Paver Depth**: The thickness of the paver (like 105mm).
*   **Paver Height**: How tall the paver is (like 80mm).
*   **Curve Radius**: This will be the inner radius of the paver curve (e.g., 400mm).
*   **Mold Wall Thickness**: The thickness of the mold itself (e.g., 4mm).
*   **Chamfer Depth**: The depth of the chamfer along the edges (e.g., 8mm).
*   **Chamfer Style**: Should allow options for flat, round, or no chamfer. I will only need to define it for the top, not the bottom.

I'd also like to ensure I can easily adjust the `$fn` value for smoothness.

The design should include:

1.  The paver itself with its specified dimensions.
2.  The mold as a negative space for the paver to fit in.
3.  Lateral chamfers on the paver itself, based on the chosen style, and on both the bottom and top of the side edges.

Could you generate the `.scad` files for this project? I'd prefer the code to be well-organized and easy to understand. Thanks a lot!

[Assistant]
Curved_Paver_Mold_v1.0.scad:
```
/* [Basic Settings] */
// Method of defining the Paver Width - EITHER an explicit number (variable Paver_Width_along_curve OR an angle (variable Paver_Angle) OR the number of pavers of an entire 360 degrees circle (Pavers_along_curve) - variables not needed for the chosen method will be ignored.
Paver_Width_Method = "explicit"; // ["explicit","angle","number of pavers"]

// Width of the paver (only Paver Width Method "explicit")
Paver_Width_along_curve = 180;
// Angle of the paver (only  Paver Width Method "angle")
Paver_Angle = 20; // [10:360]
// Number of Pavers to form an entire 360 degrees circle (only Paver Width Method "number of pavers")
Pavers_along_curve = 8; // [2:90]
// Depth of the paver
Paver_Depth = 105;
// Height of the paver
Paver_Height = 80;

// Radius of the curve aligning to the inner side of the paver
Curve_Radius = 400;
// Wall Thickness of the mold
Mold_Wall_Thickness = 4;

// Depth of the chamfer
Chamfer_Depth = 8;
// Chamfer Style
Chamfer_Style="flat"; // ["flat","round","none"]

/* [Advanced Settings] */
$fn=120;

/* [Hidden] */
// Chamfer Style at the bottom
Chamfer_Style_Bottom="none"; // not supported yet

paver_a = (Paver_Width_Method=="explicit") ?
              Paver_Width_along_curve * 360 / (2 * Curve_Radius * PI) :
          (Paver_Width_Method=="angle") ?
              Paver_Angle :
              360 / Pavers_along_curve;

c_d=Chamfer_Depth;
c_st_t=Chamfer_Style;
c_st_b=Chamfer_Style_Bottom;

cr = Curve_Radius;
ws = Mold_Wall_Thickness;
ws_a = atan(ws/(0.5*cr));
mold_a_i = paver_a;
mold_r_i = cr;
mold_d_i = Paver_Depth;
mold_h_i = Paver_Height;

mold_a_o = mold_a_i + 2 * ws_a;
mold_r_o = mold_r_i - ws;
mold_d_o = mold_d_i + 2 * ws;
mold_h_o = mold_h_i + ws;

//plg = concat(
//    [[6,6]],
//    plg=get_chamfer_points("none","sw",6,0,0,0)
//);
//
//echo(plg);
//polygon(plg);
//lateral_chamfers(paver_a,cr,Paver_Depth,Paver_Height,c_d,
//                      c_st_top=c_st_t,
//                      c_st_bottom=c_st_b);
//chamfer_vertex(6,"x","flat","flat");
main();

module main() {
    translate([mold_r_o,0,mold_h_o+2*ws])
    rotate([0,180,0])
    difference() {
        rotate([0,0,-ws_a])
            mold(mold_a_o,mold_r_o,mold_d_o,mold_h_o,ws);
        paver(mold_a_i,mold_r_i,mold_d_i,mold_h_i,c_d,c_st_t,c_st_b);
    }
}

module mold(a,r,d,h,ws) {
    plg=[[r-ws,0],[r+d+ws,0],[r+d+ws,h+2*ws],[r-ws,h+2*ws]];
    rotate_extrude(angle=a)
                    polygon(plg);
}
module paver(a,r,d,h,c,
             c_st_top=c_st_t,
             c_st_bottom=c_st_b) {

    c_sw = get_chamfer_points(c_st_bottom,"sw",c,r,d,h);
    c_nw = get_chamfer_points(c_st_top,"nw",c,r,d,h);
    c_ne = get_chamfer_points(c_st_top,"ne",c,r,d,h);
    c_se = get_chamfer_points(c_st_bottom,"se",c,r,d,h);
    plg = concat(
              c_sw,
              c_nw,
              c_ne,
              c_se
    );

    union() {
        difference() {
            rotate_extrude(angle=a)
                    polygon(plg);
            translate([r-2,0,0]) cube([d+2,c,h]);
            rotate([0,0,a]) translate([r-5,-c+0.1,0]) cube([d+5,c+5,h]);
        }
        lateral_chamfers(a,r,d,h,c);
    }
}

module lateral_chamfers(a,r,d,h,c,
                      c_st_top=c_st_t,
                      c_st_bottom=c_st_b) {
    union() {
        /* center*/
        translate([r+c,0,c]) cube([d-2*c,c,h-2*c]);
        /* bottom */
        translate([r+c,0,0])
            straight_chamfer("x","sw",d-2*c,c,c_st_bottom);

        /* top */
        translate([r+c,0,h])
        rotate([270,0,0])
            straight_chamfer("x","sw",d-2*c,c,c_st_top);
        /* left */
        translate([r,0,c])
        rotate([0,0,0])
            straight_chamfer("z","sw",h-2*c,c,c_st_top);
        /* right*/
        translate([r+d,0,c])
        rotate([0,0,90])
            straight_chamfer("z","sw",h-2*c,c,c_st_top);
        /* vertices */
        translate([r,0,0]) rotate([0,0,0]) chamfer_vertex(c,c_st_top,c_st_top,c_st_bottom);
        translate([r,0,h]) rotate([180,0,90]) chamfer_vertex(c,c_st_top,c_st_top,c_st_top);
        translate([r+d,0,0]) rotate([0,0,90]) chamfer_vertex(c,c_st_top,c_st_top,c_st_bottom);
        translate([r+d,0,h]) rotate([0,90,90]) chamfer_vertex(c,c_st_top,c_st_top,c_st_top);
    }
    rotate([0,0,a]) union() {
        /* center*/
        translate([r+c,-c,c]) cube([d-2*c,c,h-2*c]);
        /* bottom */
        translate([r+d-c,0,0])
        rotate([0,0,180])
            straight_chamfer("x","sw",d-2*c,c,c_st_bottom);
        /* top */
        translate([r+d-c,0,h])
        rotate([270,0,180])
            straight_chamfer("x","sw",d-2*c,c,c_st_top);
        /* left */
        translate([r+d,0,c])
        rotate([0,0,180])
            straight_chamfer("z","sw",h-2*c,c,c_st_top);
        /* right*/
        translate([r,0,c])
        rotate([0,0,270])
            straight_chamfer("z","sw",h-2*c,c,c_st_top);
        /* vertices */
        translate([r,0,0]) rotate([180,180,90]) chamfer_vertex(c,c_st_top,c_st_top,c_st_bottom);
        translate([r,0,h]) rotate([180,0,0]) chamfer_vertex(c,c_st_top,c_st_top,c_st_top);
        translate([r+d,0,0]) rotate([0,0,180]) chamfer_vertex(c,c_st_top,c_st_top,c_st_bottom);
        translate([r+d,0,h]) rotate([0,90,180]) chamfer_vertex(c,c_st_top,c_st_top,c_st_top);
    }
}
module straight_chamfer(axis,orientation,h,c_d,c_style) {
    rotation1 = (axis=="x") ? [0,90,0]: (axis=="y") ?[270,0,0] : [0,0,0];
    rotation2 = (axis=="x") ? [90,0,0]: (axis=="y") ?[0,270,0] : [0,0,0];

    plg = concat(
        [[c_d,c_d]],
        get_chamfer_points(c_style,orientation,c_d,0,0,0)
    );

    rotate(rotation2)
    rotate(rotation1)
    linear_extrude(h) polygon(plg);
}
module chamfer_vertex(c_d,c_style_x,c_style_y,c_style_z) {
    if(c_style_z=="none") {
        straight_chamfer("z","sw",c_d,c_d,c_style_y);
    }
    else {
        intersection(){
            straight_chamfer("x","sw",c_d,c_d,c_style_x);
            straight_chamfer("y","sw",c_d,c_d,c_style_y);
            straight_chamfer("z","sw",c_d,c_d,c_style_z);
        }
    }
}

function get_chamfer_points(c_style,c_o,c,r,d,h) =
    (c_style=="flat") ?
        (c_o=="sw") ?
            [[r+c,0],[r,c]] :
        (c_o=="nw") ?
            [[r,h-c],[r+c,h]] :
        (c_o=="ne") ?
            [[r+d-c,h],[r+d,h-c]] :
//        (c_o=="se") ?
            [[r+d,c],[r+d-c,0]] :
    (c_style=="round") ?
        (c_o=="sw") ?
            arc_segment(c,90,0,[r+c,c],180) :
        (c_o=="nw") ?
            arc_segment(c,90,0,[r+c,h-c],270) :
        (c_o=="ne") ?
            arc_segment(c,90,0,[r+d-c,h-c]) :
//        (c_o=="se") ?
            arc_segment(c,90,0,[r+d-c,c],90) :
//    (c_style=="none") ?
        (c_o=="sw") ?
            [[r+c,0],[r,0],[r,c]] :
        (c_o=="nw") ?
            [[r,h]] :
        (c_o=="ne") ?
            [[r+d,h]] :
//        (c_o=="se") ?
            [[r+d,0]]
            ;
function arc_segment(r,angle,d,origin=[0,0],rot_z=0) =
    let(
        vp1=[for (i=[0:$fn])
                [r*sin(i*angle/$fn+rot_z)+origin.x,r*cos(i*angle/$fn+rot_z)+origin.y]],
        vp2=(d>0)
            ? [for (i=[$fn:-1:0])
                [(r+d)*sin(i*angle/$fn+rot_z)+origin.x,(r+d)*cos(i*angle/$fn+rot_z)+origin.y]]
            : []
        )
        concat(vp1,vp2);
```


[User]
I want to create a set of LEGO-compatible Braille bricks. I need a way to specify a text string and have the program generate the correct Braille dot patterns on the top of the bricks, along with the corresponding text printed underneath each pattern. It should support the full Unified English Braille standard, including numbers, punctuation, and math symbols like multiplication and division, which I know are not on the keyboard. I also need a way to start a new row of bricks, and a way to create a brick with no dots, which will be used for spaces between words. The user interface should have a text entry box where I can type in my string, along with an option to choose whether the printed text below the dot pattern shows just the letter/number/symbol, or shows both the letter/number/symbol and the number prefix for the braille dots.

The bricks should be fully customizable with the following parameters:

*   **Brick height:**  Adjustable in standard LEGO height units (e.g., 1 for a plate, 3 for a regular brick).
*   **Tolerance:** A global adjustment to account for 3D printing inaccuracies (this will act as a horizontal expansion setting, decreasing the size of vertical surfaces).
*   **Circle Resolution:** The number of fragments used for the studs (and any other cylinders used in the model).
*   **Unit Length:** The X and Y dimensions of a single brick unit in mm.
*   **Plate Height:** The standard LEGO plate height in mm.
*   **Roof Thickness:** The thickness of the top surface of the brick (mm).
*   **Wall Thickness:** The thickness of the brick walls in mm.
*   **Stud Diameter:** The diameter of the LEGO studs on top of the brick (mm).
*   **Stud Height:** The height of the LEGO studs on top of the brick (mm).
*   **Under-Tube Outer Diameter:** The outer diameter of the hollow tubes on the underside of larger bricks (mm).
*   **Under-Tube Inner Diameter:** The inner diameter of the hollow tubes on the underside of larger bricks (mm).
*   **Under-Stud Diameter:** The diameter of the solid cylinders on the underside of thin bricks (mm).
*  **Play:** A value for the necessary play between bricks so that they fit together

There should also be the options to create studs and understuds. These are the common ones for the lego bricks. I'm assuming that under-tubes will only be created on bricks with both a length and width greater than one.

I'd like it to use the Roboto-Black.ttf font for the text, and parameters to adjust the font size and spacing between letters.

The code should use recursion to process the string one character at a time and generate the correct dot pattern and position of the bricks.

Can you generate the code for this? I'm not attaching any existing code, you can start from scratch.

[Assistant]
LEGOBrailleBricks-v1p0.scad:
```
/* LEGO Braille Bricks
   by Lyl3

Create LEGO compatible bricks with Braille letter pattern made out of the studs on the top instead of having 2x4 grid of studs.

This code is published at:
https://www.thingiverse.com/thing:6237635
and
https://www.printables.com/model/595238
licensed under the Creative Commons - Attribution - Share Alike license (CC BY-SA 3.0)

V0.0 - working code copied from LEGO Text Bricks
V0.1 - broken code working out basic structures and algorithms
V0.2 - basic structures and algorithms worked out, code works but has bugs
V0.3 - basic code works
V0.4 - added code patterns for all the supported characters
V0.5 - added code to select from 2 modes for the latin characters
V0.6 - added code for additional characters
V0.7 - code for numbers is improved
V0.8 - ord function isn't supported on Thingiverse customizer, so processing of input characters is completely different and based on the search function instead
V1.0 - ready for publication
*/

/*
   Set default brick to be #3020 4x2x1
*/

use <Roboto-Black.ttf>

/* [Basic Parameters] */

// Brick height (specified in LEGO height units: 3 is normal brick height, 1 is plate height).
brickHeight = 1; // [1:1:18]

// Enter the letters to be created. You can enter a carat symbol (^) to start a new row of bricks.
brick_letters = "Braille^Bricks";

// Some dot patterns are assigned to two characters and are differentiated by a prefix. Select the mode for the latin characters printed below the dot pattern. For example, "Both" shows "A 1" for both "A" and "1", while "Single" shows "A" for "A" and "1" for "1".
text_mode = 1; // [0:single, 1:both]

/* [Advanced parameters] */

// Tolerance to account for 3D printing inaccuracies (mm). This decreases the sizes of all vertical surfaces (brick walls, studs, under-tubes, and under-studs) to provide a looser fit. It is equivalent to a negative horizontal expansion setting in the Cura slicer. You might want to decrease this for bricks that are only 1 unit wide without under-studs as they will be naturally looser fitting than other bricks. The best setting is printer/filament dependent so the default is set to zero on the assumption that your printer/filament settings are well tuned.
tolerance = 0.00; // [-0.1:0.01:0.1]

// Resolution of circles. 50 fragments is more than enough for such a small cylinders unless the model will be later scaled up
numberFragments = 50;                 // [6:1:100]
$fn = numberFragments;

/* [Advanced parameters: Override LEGO dimensions] */

// X and Y dimension of one brick unit (mm)
UNIT_LENGTH = 8; // [0.8:0.01:80]

// plate height (a standard brick is 3 times this height) (mm)
PLATE_HEIGHT = 3.2; // [0.32:0.01:32]

// thickness of brick roof (mm)
ROOF_THICKNESS = 1; // [0.1:0.01:10]

// thickness of brick outer wall as in the original 1.5 mm wall without nubs (mm)
WALL_THICKNESS = 1.5; // [0.15:0.01:15]

// diameter of the studs (solid cylinders) on top of a brick (mm)
STUD_DIAMETER = 4.8; // [0.48:0.01:48]

// height of the studs (solid cylinders) on top of a brick (mm)
STUD_HEIGHT = 1.8; // [0.18:0.01:18]

// outer diameter of the under-tubes (hollow cylinders) on the underside of bricks with length > 1 and width > 1 (mm)
UNDERTUBE_OUTER_DIAMETER = 6.41; // [0.64:0.01:64.1]

// inner diameter of the under-tubes (hollow cylinders) on the underside of bricks with length > 1 and width > 1 (mm)
UNDERTUBE_INNER_DIAMETER = 4.8; // [0.48:0.01:48]

// diameter of the under-studs (solid cylinders) on the underside of bricks with length = 1 or width = 1 (mm)
UNDERSTUD_DIAMETER = 1.6; // [0.16:0.01:16]

// the necessary play between bricks so that they fit together
PLAY = 0.2; // [0.02:0.01:2]

/* [Hidden] */

fudge = 0.01;               // Amount to expand some dimensions to ensure manifold model

// Brick length (specified in number of studs).
brickLength = 4; // [1:1:48]
brickXSpacing = brickLength*UNIT_LENGTH+2;

// Brick width (specified in number of studs).
brickWidth = 2;  // [1:1:48]
brickYSpacing = brickWidth*UNIT_LENGTH+2;

// Studs on top of the brick?
withStuds = "yes"; // [yes,no]
createStuds = (withStuds=="yes") ? true : false;

// Under-studs on underneath of skinny bricks? Skinny bricks that are only one unit wide have smaller solid cylinders (under-studs) underneath instead of the usual hollow cylinders. These have a tiny footprint and may not stick to the build-plate, so you may want to avoid printing them.
withUnderStuds = "no"; // [yes,no]
createUnderStuds = (withUnderStuds=="yes") ? true : false;

// A nice clean font with thick glyphs, good for 3D printing
fontName = "Roboto:style=Black";

// The base size of the text on all sides (can be scaled down in the text parameters section).
textSize = 5.0; // [1:0.05:10]

// Spacing between letters. (ratio: 1 is normal spacing of the font) It's better to have this a little higher for this application.
letterSpacing = 1.05;  // [0.9:0.01:2.0]

braillePrefixes = [
  ["noprefix"],
  ["Cap",[0,0,0,0,0,1]],
  ["Num",[0,0,0,0,1,0]],
  ["#",[0,0,1,1,1,1]]];

/*
Thingiverse customizer can't handle these characters even in comments
so the chr function must be used to enter them
*/
specialCharacters = chr([215, 247]);
//echo("Special characters:", specialCharacters);  // Uncomment to see what the characters are

charIDs = str("^ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz1234567890,;:.!?'#+-=", specialCharacters, " ");

brailleAlphabet = [
          ["^",                      ], // First the special character assigned to make  a new line
          ["A","A  1",1,[1,0,0,0,0,0]], // Then the upper case letters
          ["B","B  2",1,[1,1,0,0,0,0]],
          ["C","C  3",1,[1,0,0,1,0,0]],
          ["D","D  4",1,[1,0,0,1,1,0]],
          ["E","E  5",1,[1,0,0,0,1,0]],
          ["F","F  6",1,[1,1,0,1,0,0]],
          ["G","G  7",1,[1,1,0,1,1,0]],
          ["H","H  8",1,[1,1,0,0,1,0]],
          ["I","I  9",1,[0,1,0,1,0,0]],
          ["J","J  0",1,[0,1,0,1,1,0]],
          ["K","K",   1,[1,0,1,0,0,0]],
          ["L","L",   1,[1,1,1,0,0,0]],
          ["M","M",   1,[1,0,1,1,0,0]],
          ["N","N",   1,[1,0,1,1,1,0]],
          ["O","O",   1,[1,0,1,0,1,0]],
          ["P","P",   1,[1,1,1,1,0,0]],
          ["Q","Q",   1,[1,1,1,1,1,0]],
          ["R","R",   1,[1,1,1,0,1,0]],
          ["S","S",   1,[0,1,1,1,0,0]],
          ["T","T",   1,[0,1,1,1,1,0]],
          ["U","U",   1,[1,0,1,0,0,1]],
          ["V","V",   1,[1,1,1,0,0,1]],
          ["W","W",   1,[0,1,0,1,1,1]],
          ["X","X",   1,[1,0,1,1,0,1]],
          ["Y","Y",   1,[1,0,1,1,1,1]],
          ["Z","Z",   1,[1,0,1,0,1,1]],
          ["A","A  1",0,[1,0,0,0,0,0]], // Then the lower case letters
          ["B","B  2",0,[1,1,0,0,0,0]],
          ["C","C  3",0,[1,0,0,1,0,0]],
          ["D","D  4",0,[1,0,0,1,1,0]],
          ["E","E  5",0,[1,0,0,0,1,0]],
          ["F","F  6",0,[1,1,0,1,0,0]],
          ["G","G  7",0,[1,1,0,1,1,0]],
          ["H","H  8",0,[1,1,0,0,1,0]],
          ["I","I  9",0,[0,1,0,1,0,0]],
          ["J","J  0",0,[0,1,0,1,1,0]],
          ["K","K",   0,[1,0,1,0,0,0]],
          ["L","L",   0,[1,1,1,0,0,0]],
          ["M","M",   0,[1,0,1,1,0,0]],
          ["N","N",   0,[1,0,1,1,1,0]],
          ["O","O",   0,[1,0,1,0,1,0]],
          ["P",     "P",   0,[1,1,1,1,0,0]],
          ["Q",     "Q",   0,[1,1,1,1,1,0]],
          ["R",     "R",   0,[1,1,1,0,1,0]],
          ["S",     "S",   0,[0,1,1,1,0,0]],
          ["T",     "T",   0,[0,1,1,1,1,0]],
          ["U",     "U",   0,[1,0,1,0,0,1]],
          ["V",     "V",   0,[1,1,1,0,0,1]],
          ["W",     "W",   0,[0,1,0,1,1,1]],
          ["X",     "X",   0,[1,0,1,1,0,1]],
          ["Y",     "Y",   0,[1,0,1,1,1,1]],
          ["Z",     "Z",                 0,[1,0,1,0,1,1]],
          ["1",     "A  1",              3,[1,0,0,0,0,0]], // Then the numbers
          ["2",     "B  2",              3,[1,1,0,0,0,0]],
          ["3",     "C  3",              3,[1,0,0,1,0,0]],
          ["4",     "D  4",              3,[1,0,0,1,1,0]],
          ["5",     "E  5",              3,[1,0,0,0,1,0]],
          ["6",     "F  6",              3,[1,1,0,1,0,0]],
          ["7",     "G  7",              3,[1,1,0,1,1,0]],
          ["8",     "H  8",              3,[1,1,0,0,1,0]],
          ["9",     "I  9",              3,[0,1,0,1,0,0]],
          ["0",     "J  0",              3,[0,1,0,1,1,0]],
          [",",     ",",                 0,[0,1,0,0,0,0]],
          [";",     ";",                 0,[0,1,1,0,0,0]],
          [":",     ":",                 0,[0,1,0,0,1,0]],
          [".",     ".",                 0,[0,1,0,0,1,1]],
          ["!",     "!  +",              0,[0,1,1,0,1,0]],
          ["?",     str("?  ",chr(215)), 0,[0,1,1,0,0,1]],
          ["'",     "'  =",              0,[0,1,1,0,1,1]],
          ["#",     "#",                 0,[0,0,1,1,1,1]],
          ["+",     "!  +",              2,[0,1,1,0,1,0]],
          ["-",     "-",                 2,[0,0,1,0,0,1]],
          ["=",     "'  =",              2,[0,1,1,0,1,1]],
          [chr(215),str("?  ",chr(215)), 2,[0,1,1,0,0,1]], // multiplication
          [chr(247),chr(247),            2,[0,0,1,1,0,0]], // division
          [" ",     " ",                 0,[0,0,0,0,0,0]]];

// echo (  "charIDs", charIDs);

/*
I need to figure out how to create the charIDs string from brailleAlphabet so that it is guaranteed to be in sync
but for some reason brailleAlphabet is not recognized within the for loop
echo ( len(brailleAlphabet) );
charIDs = concat([for (c=[0:len(brailleAlphabet)]) brailleAlphabet[c][0]]);
charIDs = concat([brailleAlphabet[for (c=[0:len(brailleAlphabet)]) c][0]]);
  echo (brailleAlphabet);
    echo (  "charIDs", charIDs);
*/

brickXShift = 0;
brickYShift = 0;
numberHasStarted = false;

//
// A recursive module to create the brick(s) for the first character
// and then call itself, passing the calculated location and the rest of the characters
//
makeBricks (brickXShift, brickYShift, brick_letters, numberHasStarted);

module makeBricks (brickXShift, brickYShift, brick_letters, numberHasStarted) {

  // Search for the first character in the string passed to this module
  charIndex = search(brick_letters[0], charIDs)[0];
  //echo (brickXShift, brickYShift, brick_letters[0], charIndex, brick_letters, numberHasStarted);

  // If the character is supported then process it
  if (charIndex != undef) {
    // A special character: ^ (this is used to start a new line of bricks)
    if (charIndex == 0) {
      if (len(brick_letters)>1)
        makeBricks (brickXShift+1, 0, substring(brick_letters, 1, len(brick_letters)), false);
    } else {
    // Make a brick for a prefix cell, if any
    if (brailleAlphabet[charIndex][2] != 0 && (!numberHasStarted || (charIndex<53) || (charIndex>62))) {
      translate ([brickXShift*brickXSpacing, brickYShift*brickYSpacing,0])
        brailleBrick (brickLength, brickWidth, brickHeight, braillePrefixes[brailleAlphabet[charIndex][2]][0], braillePrefixes[brailleAlphabet[charIndex][2]][1]);
    }
    // Make a brick for the character
    translate ([brickXShift*brickXSpacing, (brickYShift+((brailleAlphabet[charIndex][2] == 0) ? 0 : 1) * ((!numberHasStarted || (charIndex<53) || (charIndex>62)) ? 1 : 0)) *brickYSpacing,0])
    brailleBrick (brickLength, brickWidth, brickHeight, brailleAlphabet[charIndex][0+text_mode], brailleAlphabet[charIndex][3]);
    // If there are more letters, call yourself to process the rest, passing the calculated location for the next cell
    if (len(brick_letters)>1)
      makeBricks (brickXShift, brickYShift+1+(((brailleAlphabet[charIndex][2] == 0) ? 0 : 1) * (((charIndex<53)||(charIndex>62)) ? 1 : ((numberHasStarted == true) ? 0 : 1))), substring(brick_letters, 1, len(brick_letters)),
    ((charIndex>52)&&(charIndex<63)) ? true : false);
    }

  // Ignore any other character as being unsupported and if there are more letters, call yourself to process the rest
  } else {
    if (len(brick_letters)>1)
      makeBricks (brickXShift, brickYShift, substring(brick_letters, 1, len(brick_letters)), false);
  }
}

/*
   Module to make a simple rectangular LEGO compatible brick
   Makes a #3001 4x2 brick by default
*/
module brailleBrick(length=4, width=2, height=1, brickText, studPattern) {

//echo (brickText, studPattern);
  // The brick
  color("BurlyWood") translate([PLAY/2+tolerance, PLAY/2+tolerance, 0])
    difference() {
      cube([length*UNIT_LENGTH-PLAY-2*tolerance, width*UNIT_LENGTH-PLAY-2*tolerance, height*PLATE_HEIGHT]);
      translate([WALL_THICKNESS-2*tolerance, WALL_THICKNESS-2*tolerance, -ROOF_THICKNESS])
        cube([length*UNIT_LENGTH-2*WALL_THICKNESS-PLAY+2*tolerance, width*UNIT_LENGTH-2*WALL_THICKNESS-PLAY+2*tolerance, height*PLATE_HEIGHT]);
    }

  // The studs
  if(createStuds) {
    translate([0,0, height*PLATE_HEIGHT-0.00001])
      for (y = [0:1]) {
        for (x = [0:2]) {
          if (studPattern[x+3*y] == 1)
          color("Moccasin") translate([(x+0.5)*UNIT_LENGTH, (y+0.5)*UNIT_LENGTH, 0])
            cylinder(h=STUD_HEIGHT, d=STUD_DIAMETER-2*tolerance);
        }
      }
  }

  // The under-tubes (hollow cylinders)
  if (width > 1 && length > 1) {
    for (y = [1:width-1]) {
      for (x = [1:length-1]) {
        difference() {
		  translate([x*UNIT_LENGTH, y*UNIT_LENGTH, 0])
			cylinder(h=height*PLATE_HEIGHT-ROOF_THICKNESS+fudge, d = UNDERTUBE_OUTER_DIAMETER-2*tolerance);
		  translate([x*UNIT_LENGTH, y*UNIT_LENGTH, -fudge])
			cylinder(h=height*PLATE_HEIGHT-ROOF_THICKNESS+fudge, d = UNDERTUBE_INNER_DIAMETER+2*tolerance);
		}
	  }
	}
  }

  // The under-studs (smaller solid cylinders) along the length
  if (width == 1 && length > 1 && createUnderStuds) {
	for (x = [1:length-1]) {
	  translate([x*UNIT_LENGTH, 0.5*UNIT_LENGTH, 0])
	    cylinder(h=height*PLATE_HEIGHT-ROOF_THICKNESS+fudge, d=UNDERSTUD_DIAMETER-2*tolerance);
	}
  }

  // The under-studs (smaller solid cylinders) along the width
  if (length == 1 && width > 1 && createUnderStuds) {
	for (y = [1:width-1]) {
	  translate([0.5*UNIT_LENGTH, y*UNIT_LENGTH, 0])
		cylinder(h=height*PLATE_HEIGHT-ROOF_THICKNESS+fudge, d=UNDERSTUD_DIAMETER-2*tolerance);
	}
  }

  // The Latin character is added in the area below the Braille dot pattern
  color("orange") translate([(brickLength-0.25)*UNIT_LENGTH, brickWidth/2*UNIT_LENGTH, height*PLATE_HEIGHT-0.00001]) rotate([0, 0, 90])
    linear_extrude(STUD_HEIGHT*0.5+fudge) text(brickText, font=fontName, size=textSize, halign="center", spacing=letterSpacing);

}

function substring(string, start, end) =
  start < end ? str(string[start], substring(string, start + 1, end)) : "";

```


[User]
Hey, I'm looking to create a tool for notching tubes, and I'd like to generate the design using OpenSCAD. I need a parametric template that will wrap around one tube and allow me to mark the cut on another tube which is at an angle relative to the first.

Here's the basic idea:

*   The template should have a main cylindrical body that fits around the "main tube."
*   A second, angled cut-out will represent the intersection where the "notch tube" will meet the main tube.
*   I need to specify the diameters of both tubes, and the angle between them.
*   The template should also have some extra height at the base, for easier handling.
*   I would also like to specify the wall thickness of the template.

I'd like to control the design with the following parameters:
   *  `main_tube_diameter`: The outer diameter of the tube the template fits onto.
   *  `notch_tube_diameter`: The outer diameter of the tube that is being notched.
   *  `notch_angle`: The angle between the two tubes.
   *  `extra_template_height`: Additional height for ease of use at the base of the template.
    *  `wall_thickness`: Thickness of the template walls.
    *  `clocking_notch_depth`: A depth of indentation (as a percentage of wall thickness) for clocking.
   *  `clearance_tolerance`: Space between the template and the tube it fits on, to account for printing tolerances.

I need the template to have indents along the main tube part that make it easy to center on the tube that I will be using it on.  I'd also like the template to have the ability to be printed, so include the `clearance_tolerance` parameter.

I don't want to use any external libraries; it would be great if the entire template design could be self-contained. Thanks in advance!

[Assistant]
tube_notching_template.scad:
```
/*[ Main Template Properties]*/

//Geometry Resolution
$fn = 60;

//The diameter of the tube that will be wrapped by our template tool
main_tube_diameter = 50.0;//[0.5:0.1:1000]

//The diameter of the tube we are creating the notch to fit
notch_tube_diameter = 50.0;//[0.5:0.1:1000]

//The angle that the two tubes meet
notch_angle = 90;//[1:0.01:90]

/*[ Advanced Template Properties]*/

//Extra height at the base of the template
extra_template_height = 25;//[0:0.1:1000]

//Wall thickness of the template tool
wall_thickness = 2;//[1.0:0.05:10.0]

//The depth of the notches in the template that aid clocking position on your tube. Expressed as a percentage of the overall template wall thickness.
clocking_notch_depth = 25;//[0:5:50]

//Space to add in order to fit the template on your tube
clearance_tolerance = 0.5;//[0:0.1:10]

_main_tube_radius = main_tube_diameter/2;
_notch_tube_radius = notch_tube_diameter/2 + wall_thickness;
_notch_center_height = tan(notch_angle) * _main_tube_radius;
_notch_length = sqrt((_main_tube_radius*_main_tube_radius) + (_notch_center_height*_notch_center_height));
_notch_depth = (( 1 / sin(notch_angle)) * _notch_tube_radius);
_extra_depth = tan(90-notch_angle) * _main_tube_radius;
_total_height = extra_template_height + _notch_depth + _extra_depth;
_clocking_indent_depth = wall_thickness * (clocking_notch_depth/100);

difference() {
    //create main tube geometry
    difference() {
        cylinder(_total_height, r=_main_tube_radius + wall_thickness);
        translate([0,0,-1])
            cylinder(_total_height+2, r=_main_tube_radius + clearance_tolerance);
    }

    //create notching tube tool
    translate( [0,0,_total_height]){
        rotate([0,notch_angle,0]){
            linear_extrude(100000, center=true){
                circle(r=_notch_tube_radius);
                *mirror([1,0,0]){
                    translate([0,-_notch_tube_radius,0]){
                        square([_notch_tube_radius+_main_tube_radius,_notch_tube_radius*2]);
                    }
                }
            }
        }
    }

    //create small indents for clocking the template on your tube
    intersection(){
        cube([main_tube_diameter*2,2,_total_height*2], center=true);
        cylinder(_total_height, r=_main_tube_radius + _clocking_indent_depth);
    }
}

```


[User]
Hey, I'm looking to create a set of parametric geodesic dome connectors and would love some help generating the OpenSCAD files for them. I'm basing the design on the logic found here: [link to provided document].

Essentially, I need a script that can handle different geodesic dome configurations (1V, 2V, 3V, 4V, 5V, and 6V), and allow me to specify the beam profile (rectangle or round) along with the beam width, height, and the depth it inserts into the hub. The hub should also be customizable with parameters for structural tolerance (gap between beam and hub), screw hole diameter, screw hole offset, and hub wall thickness.

I want to be able to easily configure the different dome types and output the correct connectors with correct counts based on the type selected - for instance a 2V dome needs 6 of the 5-way connector, 10 of a different 6-way connector, and 5 each of two ground connectors. And a 3V dome needs 6 of a 5-way, 12 of a 6-way, 13 of another 6-way, and then 5 each of three different ground connectors.

I think I'd also like to emboss text on the top of the connectors, so I'll need text size, font, and embossing depth to be configurable, too. I'd like to use the "Cascadia Code:style=Bold" font if possible.

I'm aware there's a bunch of internal calculations going on, mostly using some dome calculator (Domerama) which I will handle separately, so I should just be able to input the angles for each hub and each type of dome, along with the chord factors for calculating the edge lengths of the struts. The script can include all that in its library, but I'd like it to be easily modifiable if I need to make changes to the lists of hub types.

For the strut profile, I'd like to be able to specify either a rectangle or a round profile, and the script needs to adjust accordingly. For rectangle beams the "width" would be the width of the beam along the x axis of the part, and the "height" along the y. For round beams, the "width" would be the beam diameter.

Could you help me generate an OpenSCAD file that can do all this? Let me know if you have any questions, I can try and clarify things.

[Assistant]
Geodesic_Dome_connector_generator_v1.2.scad:
```
// Author : Floriaddd @Thingiverse
//
// 1.1.1 : bug - Radial angle on hub were not correct. Should be ok now
// 1.1 : add support for 1V, 4V, 5V, 6V / round beam profile
// 1.0 : first release with 2V, 3V support

// Geodesic configuration - Check domerama.com for informations www.domerama.com/calculators/
geodesic_dome_type = 4; // [0:2V 1/2, 1:3V 3/8, 2:3V 5/8, 3:3V 4/9, 4:3V 5/9, 5:4V 1/2, 6:4V 7/12, 7:1V, 8:8:5V 8/15, 9:6V 1/2]

// Spherical radius - For door connector calculation on 3V dome
geodesic_radius = 1.810;

/* [Beam configuration] */
structure_profile = 0; // [0:Rectangle, 1:Round]

// Beam width or diameter (in mm)
structure_width = 40;

// Beam height (in mm)
structure_height = 20;

// Beam nesting in hub (in mm)
structure_emboitement = structure_width * 0.7;

/* [Hub configuration] */
// Structural tolerance between Beam and Hub (in mm)
jeu_emboitement = 0.1;

// Screw hole diameter (in mm) - 0 to disable screw holes
vis_diametre = 4.2;

// Screw hole offset (in mm) - 0 to get passtrough holes
vis_offset = structure_emboitement * 1/10 ;

// Hub's wall thickness (in mm)
connector_epaisseur = 3.0;

// door = true;       // [true|false]

// Generating configuration
// comment to desactivate
// onlyOneConnector = 1;

/* [Embossed text configuration] */
// Esthetic configuration
// Text size on Hub (in mm)
text_size = 12;

// Text font on Hub - go to menu Help / Font list to fit your system
text_font = "Cascadia Code:style=Bold";

// Text embossing deepness on Hub (in mm)
text_profondeur = 0.6; // in mm

// No personnalisation needed below
module __Customizer_Limit__ () {}

// Internal calculation

// How to create a connector lib
// [
// 		[15.86, 18],		// Connector Angles A, B, C... (in deg)
// 		[
// 			["AAAAA", [...], 360, 0, 0, 0, 0, 0],
//						1. text to be embosed on top of connector
//						2. radial angles
//						3. total degrees (in deg)			/>>>> to be removed
//						4. first angle _refers to Connector Angles list
//						5. second angle _refers to Connector Angles list
//						6. ...
//
// 			["ABBABB", 10, 360, 0, 1, 1, 0, 1, 1],
// 		],
// 	  [.546530, .618030 ],  Chord factor charts for further calculation
// ]
lib_connector = [
	[ //	0:2V 1/2
		[15.86, 18],			// Connector Angles A, B, C...
		[
				["AAAAA", [72, 72, 72, 72, 72], 360, 0, 0, 0, 0, 0],  // x6
				["ABBABB", [58.28, 63.43, 58.28, 58.28, 63.43, 58.28], 360, 0, 1, 1, 0, 1, 1], 		// x10
				["BBAB", [63.43, 58.28, 58.28], 180, 1, 1, 0, 1],      // x5
				["BABB", [58.28, 58.28, 63.43], 180, 1, 0, 1, 1],      // x5
		],
		[.546530, .618030 ],
	],
	[	//  1:3V 3/8
		[10.04, 11.64, 11.90],
		[
				["AAAAA", [72, 72, 72, 72, 72], 360, 0, 0, 0, 0, 0],			// x6

				["CCCCCC", [60, 60, 60, 60, 60, 60], 360, 2, 2, 2, 2, 2, 2], // x12
				["ABCBCB", [55.69, 62.15, 62.15, 62.15, 62.15, 55.69], 360, 0, 1, 2, 1, 2, 1], // x13

				["CCCC", [60, 60, 60], 180, 2, 2, 2, 2],           // x5
				["CBAB", [62.15, 55.69, 55.69], 180, 2, 1, 0, 1],           // x5
				["BABC", [55.69, 55.69, 62.15], 180, 1, 0, 1, 2],           // x5
		],
		[.348620, .403550, .412410 ],
	],
	[	//  2:3V 5/8
		[10.04, 11.64, 11.90],
		[
				["AAAAA", [72, 72, 72, 72, 72], 360, 0, 0, 0, 0, 0],			// x6

				["CCCCCC", [60, 60, 60, 60, 60, 60], 360, 2, 2, 2, 2, 2, 2], // x24
				["ABCBCB", [55.69, 62.15, 62.15, 62.15, 62.15, 55.69], 360, 0, 1, 2, 1, 2, 1], // x25

				["CCCC", [60, 60, 60], 180, 2, 2, 2, 2],           					// x5
				["BCBC", [62.15, 62.15, 62.15], 180, 1, 2, 1, 2],           // x5
				["CBCB", [62.15, 62.15, 62.15], 180, 2, 1, 2, 1],           // x5
		],
		[.348620, .403550, .412410 ], //	Chord factor for door connector calculation
	],
	[	//  3:3V 4/9 Kruschke - FLAT
		[9.49, 11.02, 12.16, 12.74],
		[
				["AAAAA", [72, 72, 72, 72, 72], 360, 0, 0, 0, 0, 0], // x6

				["ABCDCB", [55.51, 64.49, 60.00, 60.00, 68.31, 55.51], 360, 0, 1, 2, 3, 2, 1],  // x12
				["CCCCCC", [55.28, 64.72, 55.28, 64.72, 60.84, 64.72], 360, 2, 2, 2, 2, 2, 2],  // x12

				["CCCC", [55.28, 64.72, 55.28], 180, 2, 2, 2, 2],                    // x5
				["BABC", [55.51, 55.51, 64.49], 180, 1, 0, 1, 2],                    // x5
				["CBAB", [64.49, 55.51, 55.51], 180, 2, 1, 0, 1],                    // x5
		],
		[.329706, .382290, .421489, .441056 ], //	Chord factor for door connector calculation
	],
	[	//  4:3V 5/9 Kruschke - FLAT
		[9.49, 11.02, 12.16, 12.74],
		[
				["AAAAA", [72, 72, 72, 72, 72], 360, 0, 0, 0, 0, 0],			// x6

				["ABCDCB", [55.51, 64.49, 60.00, 60.00, 64.49, 55.51], 360, 0, 1, 2, 3, 2, 1], // x20
				["CCCCCC", [64.72, 55.28, 64.72, 55.28, 64.72, 55.28], 360, 2, 2, 2, 2, 2, 2], // x20

				["CCCC", [64.72, 55.28, 64.72], 180, 2, 2, 2, 2],           // x5
				["BCDC", [64.49, 60.00, 60.00], 180, 1, 2, 3, 2],           // x5
				["CDCB", [60.00, 60.00, 64.49], 180, 2, 3, 2, 1],    				// x5
		],
		[.329706, .382290, .421489, .441056 ], //	Chord factor for door connector calculation
	],
	[	//  5:4V 1/2
		[7.27, 8.49, 8.47, 9.35, 8.59, 9.00],
		[
				["AAAAA", [72, 72, 72, 72, 72], 360, 0, 0, 0, 0, 0],	// x6

				["ABCFCB", [54.88, 60.65, 64.47, 64.47, 60.65, 54.88], 360, 0, 1, 2, 5, 2, 1], // x?
				["FDDFDD", [58.28, 63.43, 58.28, 58.28, 63.43, 58.28], 360, 5, 3, 3, 5, 3, 3], // x?
				["CCDEED", [60.89, 59.55, 59.55, 60.89, 59.55, 59.55], 360, 2, 2, 3, 4, 4, 3], // x?

				["DFDD", [58.28, 58.28, 63.43], 180, 3, 5, 3, 3],         // x5
				["DEED", [59.55, 60.89, 59.55], 180, 3, 4, 4, 3],         // x5
				["DDFD", [63.43, 58.28, 58.28], 180, 3, 3, 5, 3],    			// x5
				["DCCD", [59.55, 60.89, 59.55], 180, 3, 2, 2, 3],    			// x5
		],
		[.253180,.295240,.294530,.312870,.324920,.298590]
	],
	[	//  6:4V 7/12
		[6.38, 7.46, 8.89, 9.00, 9.35, 9.48],
		[
				["AAAAA", [72, 72, 72, 72, 72], 360, 0, 0, 0, 0, 0],	// x6

				["ABCFCB", [54.68, 65.91, 59.41, 59.41, 65.91, 54.68], 360, 0, 1, 2, 5, 2, 1],  // x?
				["FDDFDD", [58.28, 63.43, 58.28, 58.28, 63.43, 58.28], 360, 5, 3, 3, 5, 3, 3],  // x?
				["CCDEED", [50.31, 64.85, 59.55, 60.89, 59.55, 64.85], 360, 2, 2, 3, 4, 4, 3],  // x?

				["CFCB", [59.41, 59.41, 65.91], 180, 2, 5, 2, 1],    // x5
				["BCFC", [65.91, 59.41, 59.41], 180, 1, 2, 5, 2],    // x5
				["CDEE", [64.85, 59.55, 60.89], 180, 2, 3, 4, 4],    // x5
				["EEDC", [60.89, 59.55, 64.85], 180, 4, 4, 3, 2],    // x5
		],
		[.222190,.259580,.309060,.312870,.324920,.329420]
	],
	[ //	7:1V
		[31.72],
		[
				["", [60.92, 60.92, 60.92, 60.92, 60.92, 60.92], 360, 0, 0, 0, 0, 0, 0],          	// x6
				["", [60.92, 60.92, 60.92], 180, 0, 0, 0, 0],           			// x5
		],
		[.1051 ],
	],
	[	//  8:5V 8/15
		[5.69, 6.48, 6.65, 6.66, 7.04, 7.05, 7.10, 7.33, 7.52],
		[
				["AAAAA", [72, 72, 72, 72, 72], 360, 0, 0, 0, 0, 0],		// x6

				["ABCHCB", [54.54, 59.53, 65.93, 65.93, 59.53, 54.54], 360, 0, 1, 2, 7, 2, 1], // x30
				["HDFIFD", [56.57, 62.97, 60.47, 60.47, 62.97, 56.57], 360, 7, 3, 5, 8, 5, 3], // x30
				["CCDEED", [62.24, 58.88, 58.88, 62.24, 58.88, 58.88], 360, 2, 2, 3, 4, 4, 3], // x30
				["EFFEGG", [59.71, 60.57, 59.71, 59.71, 60.57, 59.71], 360, 4, 5, 5, 4, 6, 6], // x30

				["DEED", [58.88, 62.24, 58.88], 180, 3, 4, 4, 3],           // x5
				["DFIF", [62.97, 60.47, 60.47], 180, 3, 5, 8, 5],           // x5
				["FFEG", [60.57, 59.71, 59.71], 180, 5, 5, 4, 6],    // x5
				["GEFF", [59.71, 59.71, 60.57], 180, 6, 4, 5, 5],    // x5
				["FIFD", [60.47, 60.47, 62.97], 180, 5, 8, 5, 3],    // x5
		],
		[0.19814743,0.23179025,0.22568578,0.24724291,0.25516701,0.24508578,0.26159810,0.23159760,0.24534642],
	],
	[	//  9:6V 1/2
		[4.66, 5.22, 5.38, 5.47, 5.68, 5.82, 5.91, 6.18, 6.22],
		[
				["AAAAA", [72, 72, 72, 72, 72], 360, 0, 0, 0, 0, 0],	// x6

				["ABCECB", [54.36, 58.71, 66.93, 66.93, 51.95, 54.36], 360, 0, 1, 2, 4, 2, 1],  // x?
				["CCDGGD", [63.43, 58.28, 58.28, 63.43, 58.28, 58.28], 360, 2, 2, 3, 6, 6, 3],  // x?
				["GGDGGD", [63.43, 58.28, 58.28, 63.43, 58.28, 58.28], 360, 6, 6, 3, 6, 6, 3],  // x?
				["FGHIHG", [60.59, 58.83, 60.59, 60.59, 58.83, 60.59], 360, 5, 6, 7, 8, 7, 6],  // x?
				["IIIIII", [60, 60, 60, 60, 60, 60], 360, 8, 8, 8, 8, 8, 8],  // x?

				["GHIH", [58.83, 60.59, 60.59], 180, 6, 7, 8, 7],    // x5
				["HIHG", [60.59, 60.59, 58.83], 180, 7, 8, 7, 6],    // x5
				["GGDG", [63.43, 58.28, 58.28], 180, 6, 6, 3, 6],    // x5
				["GFGH", [60.59, 60.59, 58.83], 180, 6, 5, 6, 7],    // x5
				["HGFG", [58.83, 60.59, 60.59], 180, 7, 6, 5, 6],    // x5
				["GDGG", [58.28, 58.28, 63.43], 180, 6, 3, 6, 6],    // x5
		],
		[0.16256722, 0.19047686, 0.18190825, 0.20281969, 0.1873834, 0.19801258, 0.20590774, 0.21535373, 0.21662821],
	],
];

angles = lib_connector[geodesic_dome_type][0];
connector_angles = lib_connector[geodesic_dome_type][1];

structure_width_def = structure_width + jeu_emboitement;
structure_height_def = structure_height + jeu_emboitement;
structure_emboitement_def = structure_emboitement;

polygone_cote = structure_profile == 0 ? structure_height_def : structure_width_def;
angle_max = max(angles);

text_size_def = min(text_size, polygone_cote);

// Engine configuration

$fn = 32;
// main_unit = 0; //[0: "Millimeters", 2: "Inches" ]
// unit_factor = [1, 25.4] * 1;

function add(v, nb, i = 0, r = 0) = i <= nb ? add(v, nb, i + 1, r + v[i]) : r;

module generateConnectors(idx) {
	connector_data = connector_angles[idx];
	nb_depart = len(connector_data)-3;
	angle_total = connector_data[2];
  radial_angles = (is_list(connector_data[1]) && len(connector_data[1])>0) ? connector_data[1] : undef;

	assert(radial_angles != undef, "Radial angles not defined for this geodesic type. Need calculations");

	angle_ajout = angle_total == 360 ? angle_total/(nb_depart) : angle_total/(nb_depart -1 );

	rayon_polygone = (polygone_cote+ 2*connector_epaisseur) / (2*tan(180/(nb_depart / angle_total * 360)));

	union() {
		difference() {
			union() {
				for ( i = [0 : nb_depart-1] ){

					strConnector = chr(65 + connector_data[i+3] ) ;        // A modifier pour 3V 4V...

					radial_angle = i == 0 ? 0 : add(radial_angles,i-1);

					rotate(a = -radial_angle, v = [0, 0, 1])

					difference (){
						translate([ rayon_polygone,-(polygone_cote + connector_epaisseur *2)/2,0])
						rotate(a = angles[connector_data[i+3]], v = [0, structure_height_def/2, 0])
							union(){
								difference(){

									if (structure_profile == 0) {
										// Square shape
										difference() {
											translate([0,0,-structure_width_def + (connector_epaisseur * 2)])
											cube([structure_emboitement,structure_height_def + connector_epaisseur *2 , structure_width_def *2 ]);

											translate([-1,connector_epaisseur,connector_epaisseur])
											cube([structure_emboitement + 2,structure_height_def, structure_width_def]);

											rotate(a=90, v=[1,0,0])
											translate([structure_emboitement/2,10,-text_profondeur + 0.01])
											infotext(strConnector, text_profondeur);
										}
									} else if (structure_profile == 1) {
										// Round shape
										difference() {
											union() {

												translate([0,0, -structure_width_def * 1.5 + (connector_epaisseur * 2) ])
												cube([structure_emboitement,structure_width_def + connector_epaisseur *2 , structure_width_def *2 ]);

												translate([0, (structure_width_def + connector_epaisseur*2 )/2 , structure_width_def /2 + (connector_epaisseur * 1) ])
												rotate(a=90,  v=[0,1,0])
												cylinder(h=structure_emboitement, r= (structure_width_def + connector_epaisseur *2 )/2 );

											}

											translate([-1,(structure_width_def + connector_epaisseur*2 )/2,connector_epaisseur + structure_width_def/2])
											// cube([structure_emboitement + 2,structure_height_def, structure_width_def]);
											rotate(a=90, v=[0,1,0])
											cylinder(h= structure_emboitement + 2, r=structure_width_def/2);

											rotate(a=90, v=[1,0,0])
											translate([structure_emboitement/2,10,-text_profondeur + 0.01])
											infotext(strConnector, text_profondeur);
										}
									}

									// Screw hole
									if (vis_diametre > 0) {
										if (vis_offset == 0) {
											translate([structure_emboitement*0.6,(polygone_cote +connector_epaisseur *2) /2,structure_width_def/2 + connector_epaisseur])
											cylinder(h= 5000 , r=vis_diametre, center=true);
										} else {
											union() {

												translate([structure_emboitement/2 + vis_offset/2 , polygone_cote/2 + connector_epaisseur,0])
												rotate(a = -angles[connector_data[i+3]], v = [0, polygone_cote/2, 0])
												cylinder(h= structure_width_def/2  , r=vis_diametre, center=true);

												translate([structure_emboitement/2 - vis_offset/2 , polygone_cote/2 + connector_epaisseur,structure_width_def + connector_epaisseur])
												cylinder(h= connector_epaisseur * 3  , r=vis_diametre, center=true);

											}
										}
									}
								}

								if (structure_profile == 0) {

									// Square shape
									translate([-structure_emboitement *5 ,0,-5000 + structure_width_def + (connector_epaisseur * 2)])
									cube([structure_emboitement *5,structure_height_def + connector_epaisseur *2 , 5000 ]);

								} else if (structure_profile == 1) {

									// Round shape
									union() {

										translate([-5000,0, -structure_width_def * 1.5 + (connector_epaisseur * 2) ])
										cube([5000,structure_width_def + connector_epaisseur *2 , structure_width_def *2 ]);

										translate([-5000, (structure_width_def + connector_epaisseur*2 )/2 , structure_width_def /2 + (connector_epaisseur * 1) ])
										rotate(a=90,  v=[0,1,0])
										cylinder(h=5000, r= (structure_width_def + connector_epaisseur *2 )/2 );

									}
								}
							}

						translate ([-5000,0,0])
						cube ([ 10000, structure_height_def * 4, structure_width_def * 4 ], center= true);

					}

				}
			}

			// Bottom finishing
			translate([0,0,-5000 - structure_emboitement * sin(angle_max) ])
			cube([ 10000 , 10000, 10000], true);

			// Top finishing
			translate([0,0, 5000  + structure_width_def + connector_epaisseur  ])
			cube([ 10000, 10000, 10000], true);

			// Text embossing
			translate([0,0, structure_width_def + connector_epaisseur - text_profondeur + 0.1])
			rotate(a=180, v=[0,0,1])
			infotext(connector_data[0], text_profondeur, 6);

		}

	}
}

if (is_undef( onlyOneConnector )) {

	arrangement_hub = ceil(sqrt(len(connector_angles)));

	for (i  = [0 : len(connector_angles) - 1])
	{

		translate([floor( i/arrangement_hub) * structure_emboitement * 6,
							 i%arrangement_hub * structure_emboitement * 6,
							 0])
		generateConnectors(i);
	}
}
else {
	generateConnectors(onlyOneConnector);

}

module infotext(str, prof, size = text_size_def)
{
    linear_extrude(prof)
        text(str, size, text_font, halign="center", valign="center");
}

```