[User]
Hey, I'm working on a project involving linear motion and I'd like to use flexures. I've seen some cool designs online, and I have a basic understanding of how they work, but I'm not confident in creating them myself. I'd really appreciate it if you could help me generate some parametric OpenSCAD files for different types of single-axis linear flexures.

Specifically, I'm interested in several different designs:

1.  **Asymmetric Flexure:** This design would have the beams positioned asymmetrically relative to the central shuttle. I'd like parameters for shuttle size (X and Y dimensions), slot width (which determines the amount of travel), beam length, minimum beam width at the notch, maximum beam width outside the notch, and a notch scaling factor.

2.  **Asymmetric Folded Flexure:** This is similar to the asymmetric design, but with the beams folded back on themselves. It should have the same parameters as the first one, and the beams should be folded in a way that doesn't overlap.

3.  **Symmetric Flexure:** Here, the beams are arranged symmetrically around the central shuttle. In addition to the parameters from the asymmetric flexure, I'd like to include a parameter for the 'center size' which is the space between the beams in the middle. If this center size is equal to the shuttle X dimension, then the beams should move to the side and the pattern should be shorter in the vertical direction.

4.  **Symmetric Flexure (Inside-Out Version):** This is like the symmetric flexure but "inside-out," where the beams are on the inside edge of the flexure and the slots are on the outside edge. It should include all parameters as the symmetric flexure.

5.  **Symmetric Double Flexure:** This is similar to the symmetric flexure but uses double the beams stacked vertically on each side. All other parameters should stay the same as for the other symmetric flexures, including center size.

6.  **Double Shifted Flexure:** This is a modified version of the symmetric double flexure with a vertical offset of the beams.

I'd like all the designs to be generated with parameters that can control:

*   **Overall outer dimensions:**  Total X and Y size of the part
*   **Thickness**: The Z height of the part.
*   **Shuttle dimensions:** Both X and Y
*   **Slot Width:**  How far the central shuttle can travel.
*   **Beam Length:**
*   **Beam width:** Both maximum and minimum widths of the beams, with a scaling parameter that will make notches easier to print even if the beam widths are nearly equal
*   **Center Size:** Only used on symmetric designs.

I also want the flexure modules to generate a 2D profile for the slots, which can be then extruded.
I don't think I need any special libraries to do that. Also, please include the ability to select different designs using a 'part' parameter. I'd also like to be able to control the level of detail of circles.

It would be great if the code would include some comments so I can easily understand what each part of the code does, and how the parameters affect the final design.

Thanks a lot!

[Assistant]
LinearFlexures.scad:
```
part = 1; // [1:Asymmetric,2:Assymetric Folded,3:Symmetric,4:Symmetric 2,5:Symmetric Double,6:Double Shifted]

// Overall outer dimensions of part
totalX = 40;
totalY = 40;
// Thickness(height) of the part.
thickness = 5;

// Dimensions of the inner shuttle which moves
shuttleX = 12;
shuttleY = 15;

// Slot width determines travel distance in each direction
slotWidth = 1.5;

// Beam length, may be automatically overriden to longer length if within bounds of outer slot
l = 8;
// Notches narrow down the beams to the minWidth
minWidth = 0.8;
// Thickness of beams where not notched
maxWidth = 1.6;

// Higher scaling makes notches longer, does not affect depth of notch
notchScale = 1.5;

// Blank space on the edge of the shuttle, between beams. (maxWidth <= centerSize <= shuttleX) Not used on "asymmetric" parts.  If centerSize==shuttleX , beams move to side & flexure is compacted vertically
centerSize = 12;

/* [Hidden] */
// Level of detail for circular holes
$fn = 100;

print_part();

module print_part() {

  //%color("red", 0.25) square([shuttleX,shuttleY],center=true); // show shuttle size
  //%color("yellow", 0.25)square([centerSize,totalY],center=true); // show centerSize
  //%color("blue", 0.25) translate([shuttleX/2-maxWidth/2,0]) square([maxWidth,totalY],center=true); // show centerSize
  //%color("blue", 0.25) translate([-shuttleX/2+maxWidth/2,0]) square([maxWidth,totalY],center=true); // show centerSize
  linear_extrude(thickness) difference() {
    roundedSquare(totalX,totalY, 2.5,center=true);
    if (part == 1) {
      flexureAsym([shuttleX,shuttleY],slotWidth,l,minWidth,maxWidth,notchScale);
    } else if (part == 2) {
      flexureAsymFolded([shuttleX,shuttleY],slotWidth,l,minWidth,maxWidth,notchScale);
    } else if (part == 3) {
      flexureSymmetric([shuttleX,shuttleY],slotWidth,l,minWidth,maxWidth,notchScale, centerSize);
    } else if (part == 4) {
      flexureSymmetric2([shuttleX,shuttleY],slotWidth,l,minWidth,maxWidth,notchScale, centerSize);
    } else if (part == 5) {
      flexureSymmetricDouble([shuttleX,shuttleY],slotWidth,l,minWidth,maxWidth,notchScale, centerSize);
    } else if (part == 6) {
      flexureDoubleShifted([shuttleX,shuttleY],slotWidth,l,minWidth,maxWidth,notchScale, centerSize);
    }
  }
}

module roundedSquare(l, w, r,center) {
  x = center ? 0 : l/2;
  y = center ? 0 : w/2;
  translate([x,y]) union() {
    square([l-2*r,w], center=true);
    square([l,w-2*r], center=true);
    // rounded corners
    translate([-l/2+r,-w/2+r]) circle(r = r);
    translate([l/2-r,-w/2+r]) circle(r = r);
    translate([-l/2+r,w/2-r]) circle(r = r);
    translate([l/2-r,w/2-r]) circle(r = r);
  }
}

module beam(l, s, w1, w2, dScale=1) {
  d = (w2 - w1)*dScale;  // can scale d... should this be a parameter?
  x = sqrt( pow(d/2,2) - pow((d+w1-w2)/2,2) );
  intersection() {
    union() {
      // slot above and below beam
      translate([0,(s+w2)/2]) square([l,s], center=true);
      translate([0,-(s+w2)/2]) square([l,s], center=true);
      // semicircle where beam necks down
      translate([-l/2+x,-(d+w1)/2]) circle(d = d);
      translate([l/2-x,-(d+w1)/2]) circle(d = d);
      translate([-l/2+x,(d+w1)/2]) circle(d = d);
      translate([l/2-x,(d+w1)/2]) circle(d = d);
    }
    roundedSquare(l,w2+2*s,s/2,center=true);
  }
}

// Asymmetric in horizontal direction, beam length is determined by shuttle size
module flexureAsym(shuttleSize, slotWidth, beamLength, minWidth, maxWidth, notchScale) {
  shuttleX = shuttleSize[0];
  shuttleY = shuttleSize[1];
  l = (beamLength+maxWidth-slotWidth > shuttleX) ? beamLength : shuttleX-maxWidth+slotWidth;
  a = l/2-shuttleX/2+maxWidth;
  b = (shuttleY+slotWidth)/2;
  c = maxWidth + slotWidth;

  union() {
    translate([a,b+c/2]) beam(l, slotWidth, minWidth, maxWidth, notchScale);
    translate([a,-b-c/2]) beam(l, slotWidth, minWidth, maxWidth, notchScale);

    x1 = shuttleX/2+slotWidth/2;
    // outer side slots
    translate([x1,0]) square([slotWidth, b*2],center=true);
    translate([-x1,0]) square([slotWidth, (b+c)*2],center=true);
    // rounded corners for outer slot path
    translate([-x1,b+c]) circle(d=slotWidth);
    translate([-x1,-b-c]) circle(d=slotWidth);

    x2 = x1+a;
    // connect outer side slots to beamSlots horizontally
    translate([a-x2/2,b+c]) square([x2,slotWidth], center=true);
    translate([a-x2/2,-b-c]) square([x2,slotWidth], center=true);
  }
}

// Asymmetric in horizontal direction, beam length is determined by shuttle size
module flexureAsymFolded(shuttleSize, slotWidth, beamLength, minWidth, maxWidth, notchScale) {
  shuttleX = shuttleSize[0];
  shuttleY = shuttleSize[1];
  l = (beamLength + 2*maxWidth > shuttleX) ? beamLength : shuttleX - 2*maxWidth;
  a = shuttleX/2-l/2-maxWidth;
  b = (shuttleY + maxWidth)/2 + slotWidth;
  c = (maxWidth + slotWidth)/2;

  union() {
    translate([a,-b-2*c]) beam(l, slotWidth, minWidth, maxWidth, notchScale);
    translate([a,-b]) beam(l, slotWidth, minWidth, maxWidth, notchScale);
    translate([a,b]) beam(l, slotWidth, minWidth, maxWidth, notchScale);
    translate([a,b+2*c]) beam(l, slotWidth, minWidth, maxWidth, notchScale);

    x1 = shuttleX/2+slotWidth/2;
    // outer side slots
    translate([x1,0]) square([slotWidth, 2*b+2*c],center=true);
    translate([-x1,0]) square([slotWidth, 2*b-2*c],center=true);

    // rounded corners for outer slot path
    //translate([-x1,b+3*c]) circle(d=slotWidth);
    //translate([-x1,-b-3*c]) circle(d=slotWidth);
    translate([x1,b+c]) circle(d=slotWidth);
    translate([x1,-b-c]) circle(d=slotWidth);

    x2 = x1-a;
    // connect outer side slots to beamSlots horizontally
    translate([x1-x2/2,b+c]) square([x2,slotWidth], center=true);
    translate([x1-x2/2,-b-c]) square([x2,slotWidth], center=true);

    x3 = a-l/2-maxWidth/2;
    translate([x3,b+3*c]) square([2*c,slotWidth], center=true);
    translate([x3,-b-3*c]) square([2*c,slotWidth], center=true);
    translate([x3,b-c]) square([2*c,slotWidth], center=true);
    translate([x3,-b+c]) square([2*c,slotWidth], center=true);

    translate([x3-c,-b-c]) square([slotWidth, 4*c],center=true);
    translate([x3-c,b+c]) square([slotWidth, 4*c],center=true);

    // rounded corners for outer slot path
    translate([x3-c,b+3*c]) circle(d=slotWidth);
    translate([x3-c,-b-3*c]) circle(d=slotWidth);
    translate([x3-c,b-c]) circle(d=slotWidth);
    translate([x3-c,-b+c]) circle(d=slotWidth);

  }
}

module flexureSymmetric(shuttleSize, slotWidth, beamLength, minWidth, maxWidth, notchScale, centerSize) {
  shuttleX = shuttleSize[0];
  shuttleY = shuttleSize[1];
  l = (2*beamLength+centerSize+2*maxWidth > shuttleX) ? beamLength : (shuttleX - 2*maxWidth - centerSize)/2;
  a = (centerSize + l)/2;
  b = (centerSize > shuttleX) ? shuttleY/2 : (shuttleY + slotWidth)/2;
  c = (slotWidth + maxWidth)/2;

  union() {
    // horizontal slots with rounded holes on end
    translate([-a,-b-c]) beam(l, slotWidth, minWidth, maxWidth, notchScale);
    translate([a,-b-c]) beam(l, slotWidth, minWidth, maxWidth, notchScale);
    translate([-a,b+c]) beam(l, slotWidth, minWidth, maxWidth, notchScale);
    translate([a,b+c]) beam(l, slotWidth, minWidth, maxWidth, notchScale);

    // center slots
    translate([0,b]) square([a*2-l+slotWidth, slotWidth],center=true);
    translate([0,-b]) square([a*2-l+slotWidth, slotWidth],center=true);

    // outer vertical slots
    translate([a+l/2+slotWidth/2+maxWidth,0]) square([slotWidth, shuttleY+4*c+slotWidth],center=true);
    translate([-a-l/2-slotWidth/2-maxWidth,0]) square([slotWidth, shuttleY+4*c+slotWidth],center=true);

    // connect outer vertical slots to outer horizontal slots
    translate([a+l/2+c-slotWidth/2,b+2*c]) square([2*c, slotWidth],center=true);
    translate([-a-l/2-c+slotWidth/2,b+2*c]) square([2*c, slotWidth],center=true);
    translate([a+l/2+c-slotWidth/2,-b-2*c]) square([2*c, slotWidth],center=true);
    translate([-a-l/2-c+slotWidth/2,-b-2*c]) square([2*c, slotWidth],center=true);

    // rounded corners for outer slot path
    translate([a+l/2+maxWidth+slotWidth/2,b+2*c]) circle(d=slotWidth);
    translate([-a-l/2-maxWidth-slotWidth/2,b+2*c]) circle(d=slotWidth);
    translate([a+l/2+maxWidth+slotWidth/2,-b-2*c]) circle(d=slotWidth);
    translate([-a-l/2-maxWidth-slotWidth/2,-b-2*c]) circle(d=slotWidth);
  }
}

// inside-out version of flexureSymmetric
module flexureSymmetric2(shuttleSize, slotWidth, beamLength, minWidth, maxWidth, notchScale, centerSize) {
  shuttleX = shuttleSize[0];
  shuttleY = shuttleSize[1];
  l = (2*beamLength+centerSize-2*slotWidth > shuttleX) ? beamLength : (shuttleX - centerSize)/2 + slotWidth;
  a = (centerSize + l)/2;
  c = (slotWidth + maxWidth)/2;
  b = (centerSize >= shuttleX) ? shuttleY/2-2*c+slotWidth/2 : (shuttleY + slotWidth)/2;

  union() {
    // horizontal slots with rounded holes on end
    translate([-a,-b-c]) beam(l, slotWidth, minWidth, maxWidth, notchScale);
    translate([a,-b-c]) beam(l, slotWidth, minWidth, maxWidth, notchScale);
    translate([-a,b+c]) beam(l, slotWidth, minWidth, maxWidth, notchScale);
    translate([a,b+c]) beam(l, slotWidth, minWidth, maxWidth, notchScale);

    // center slots
    translate([0,b+2*c]) square([a*2-l+slotWidth, slotWidth],center=true);
    translate([0,-b-2*c]) square([a*2-l+slotWidth, slotWidth],center=true);

    x1 = shuttleX/2+slotWidth/2;
    // outer vertical slots
    translate([x1,0]) square([slotWidth, 2*b],center=true);
    translate([-x1,0]) square([slotWidth, 2*b],center=true);
    // rounded corners for outer slot path
    translate([x1,b]) circle(d=slotWidth);
    translate([-x1,b]) circle(d=slotWidth);
    translate([x1,-b]) circle(d=slotWidth);
    translate([-x1,-b]) circle(d=slotWidth);
    l1 = centerSize;
    // connect outer vertical slots to outer horizontal slots
    translate([(x1+a)/2,b]) square([abs(x1-a), slotWidth],center=true);
    translate([-(x1+a)/2,b]) square([abs(x1-a), slotWidth],center=true);
    translate([(x1+a)/2,-b]) square([abs(x1-a), slotWidth],center=true);
    translate([-(x1+a)/2,-b]) square([abs(x1-a), slotWidth],center=true);
  }
}

module flexureSymmetricDouble(shuttleSize, slotWidth, beamLength, minWidth, maxWidth, notchScale, centerSize) {
  shuttleX = shuttleSize[0];
  shuttleY = shuttleSize[1];
  l = (2*beamLength+centerSize-2*slotWidth > shuttleX) ? beamLength : (shuttleX+2*slotWidth-centerSize)/2;
  a = (centerSize + l)/2; // horizontal offset of center of beam from center of shuttle
  b = (centerSize >= shuttleX) ? shuttleY/2-maxWidth/2 : shuttleY/2+slotWidth+maxWidth/2; // vertical offset of first beam nearest shuttle
  c = (slotWidth + maxWidth)/2; // half the vertical distance between beams
  e = max(a+l/2+slotWidth/2+maxWidth, shuttleX/2+slotWidth/2+maxWidth+slotWidth); // horizontal offset of outer

  union() {
    // horizontal slots with rounded holes on end
    translate([-a,-b-2*c]) beam(l, slotWidth, minWidth, maxWidth, notchScale);
    translate([a,-b-2*c]) beam(l, slotWidth, minWidth, maxWidth, notchScale);
    translate([-a,-b]) beam(l, slotWidth, minWidth, maxWidth, notchScale);
    translate([a,-b]) beam(l, slotWidth, minWidth, maxWidth, notchScale);
    translate([-a,b]) beam(l, slotWidth, minWidth, maxWidth, notchScale);
    translate([a,b]) beam(l, slotWidth, minWidth, maxWidth, notchScale);
    translate([-a,b+2*c]) beam(l, slotWidth, minWidth, maxWidth, notchScale);
    translate([a,b+2*c]) beam(l, slotWidth, minWidth, maxWidth, notchScale);

    // center slots
    translate([0,b+c]) square([a*2-l+slotWidth, slotWidth],center=true);
    translate([0,-b-c]) square([a*2-l+slotWidth, slotWidth],center=true);

    // outer vertical side slots
    translate([-e,0]) square([slotWidth, 2*b+6*c],center=true);
    translate([e,0]) square([slotWidth, 2*b+6*c],center=true);
    // connect outer vertical slots to outer horizontal slots
    translate([-(e+a)/2,-b-3*c]) square([e-a, slotWidth],center=true);
    translate([(e+a)/2,-b-3*c]) square([e-a, slotWidth],center=true);
    translate([-(e+a)/2,b+3*c]) square([e-a, slotWidth],center=true);
    translate([(e+a)/2,b+3*c]) square([e-a, slotWidth],center=true);
    // rounded corners for outer slot path
    translate([e,-b-3*c]) circle(d=slotWidth);
    translate([-e,-b-3*c]) circle(d=slotWidth);
    translate([e,b+3*c]) circle(d=slotWidth);
    translate([-e,b+3*c]) circle(d=slotWidth);

    x3 = (shuttleX/2+slotWidth/2);
    // Slots for sides of shuttle
    translate([-x3,0]) square([slotWidth, 2*b-2*c],center=true);
    translate([x3,0]) square([slotWidth, 2*b-2*c],center=true);
    // connext shuttle side slots horizontally
    translate([-(x3+a)/2,-b+c]) square([abs(x3-a), slotWidth],center=true);
    translate([(x3+a)/2,-b+c]) square([abs(x3-a), slotWidth],center=true);
    translate([-(x3+a)/2,b-c]) square([abs(x3-a), slotWidth],center=true);
    translate([(x3+a)/2,b-c]) square([abs(x3-a), slotWidth],center=true);
    // rounded corners for inner slot path
    translate([x3,b-c]) circle(d=slotWidth);
    translate([-x3,b-c]) circle(d=slotWidth);
    translate([x3,-b+c]) circle(d=slotWidth);
    translate([-x3,-b+c]) circle(d=slotWidth);
  }
}

module flexureDoubleShifted(shuttleSize, slotWidth, beamLength, minWidth, maxWidth, notchScale, centerSize) {
  shuttleX = shuttleSize[0];
  shuttleY = shuttleSize[1];
  l = (2*beamLength+centerSize-2*slotWidth > shuttleX) ? beamLength : (shuttleX+2*slotWidth-centerSize)/2;
  a = (centerSize + l)/2; // horizontal offset of center of beam from center of shuttle
  b = (centerSize >= shuttleX) ? shuttleY/2-maxWidth/2 : shuttleY/2+slotWidth+maxWidth/2; // vertical offset of first beam nearest shuttle
  c = (slotWidth + maxWidth)/2; // half the vertical distance between beams
  e = max(a+l/2+slotWidth/2+maxWidth, shuttleX/2+slotWidth/2+maxWidth+slotWidth); // horizontal offset of outer

  offset = (centerSize >= shuttleX) ? 2*c : 0;
  translate([0,offset])
  union() {
    // horizontal slots with rounded holes on end
    translate([-a,-b-2*c]) beam(l, slotWidth, minWidth, maxWidth, notchScale);
    translate([a,-b-2*c]) beam(l, slotWidth, minWidth, maxWidth, notchScale);
    translate([-a,-b]) beam(l, slotWidth, minWidth, maxWidth, notchScale);
    translate([a,-b]) beam(l, slotWidth, minWidth, maxWidth, notchScale);
    translate([-a,b]) beam(l, slotWidth, minWidth, maxWidth, notchScale);
    translate([a,b]) beam(l, slotWidth, minWidth, maxWidth, notchScale);
    translate([-a,b+2*c]) beam(l, slotWidth, minWidth, maxWidth, notchScale);
    translate([a,b+2*c]) beam(l, slotWidth, minWidth, maxWidth, notchScale);

    // center slots
    translate([0,b-c]) square([a*2-l+slotWidth, slotWidth],center=true);
    translate([0,-b-3*c]) square([a*2-l+slotWidth, slotWidth],center=true);

    // outer vertical side slots
    translate([-e,0]) square([slotWidth, 2*b+6*c],center=true);
    translate([e,0]) square([slotWidth, 2*b+6*c],center=true);
    // connect outer vertical slots to outer horizontal slots
    translate([-(e+a)/2,-b-3*c]) square([e-a, slotWidth],center=true);
    translate([(e+a)/2,-b-3*c]) square([e-a, slotWidth],center=true);
    translate([-(e+a)/2,b+3*c]) square([e-a, slotWidth],center=true);
    translate([(e+a)/2,b+3*c]) square([e-a, slotWidth],center=true);
    // rounded corners for outer slot path
    translate([e,-b-3*c]) circle(d=slotWidth);
    translate([-e,-b-3*c]) circle(d=slotWidth);
    translate([e,b+3*c]) circle(d=slotWidth);
    translate([-e,b+3*c]) circle(d=slotWidth);

    x3 = (shuttleX/2+slotWidth/2);
    // Slots for sides of shuttle
    translate([-x3,0]) square([slotWidth, 2*b-2*c],center=true);
    translate([x3,0]) square([slotWidth, 2*b-2*c],center=true);
    // connext shuttle side slots horizontally
    translate([-(a+x3)/2,-b+c]) square([abs(x3-a), slotWidth],center=true);
    translate([(a+x3)/2,-b+c]) square([abs(x3-a), slotWidth],center=true);
    translate([-(a+x3)/2,b-c]) square([abs(x3-a), slotWidth],center=true);
    translate([(a+x3)/2,b-c]) square([abs(x3-a), slotWidth],center=true);
    // rounded corners for inner slot path
    translate([x3,b-c]) circle(d=slotWidth);
    translate([-x3,b-c]) circle(d=slotWidth);
    translate([x3,-b+c]) circle(d=slotWidth);
    translate([-x3,-b+c]) circle(d=slotWidth);
  }
}

```


[User]
I'd like to design a parametric clip in OpenSCAD. It should have a cylindrical body with a section removed, creating a C-shape. The key parameters I need to control are:

*   **`clipInnerDiam`**: The inner diameter of the main cylindrical body of the clip.
*   **`clipThikness`**: The thickness of the clip's wall.
*   **`clipHeight`**: The height of the clip.
*   **`clipPercentOverlap`**: The percentage overlap of the two small cylinders that form the ends of the clip. These small cylinders are placed at each end of the opening of the C-shape.
*  **`clipAngle`**:  The opening angle in degrees, defining the width of the gap in the clip.
*   **`bevelAngle`**: An angle in degrees controlling a bevel cut on the edges of the gap.

The design should be generated using basic OpenSCAD primitives, using modules to keep things tidy and parametric.  Specifically, I'd expect that there would be a module `clip(id, t, h)` which constructs the basic shape as a difference of cylinders. Then, I would like a module `pie(radius, angle, height, spin=0)` which can generate the pie-shaped cutout, also using the difference of primitives, as well as the linear_extrude operation for the height, and the rotate operation for the spin parameter. The cut should be created by combining the `clip` module and the `pie` module with a difference operation. Following this, two short cylinders should be created to fill out the ends of the cut portion of the clip; the percent overlap should modify the size of these small end cylinders, and the orientation of these should correspond to the clipping angle. Finally, to apply the bevel cut, another difference operation should remove two cubes which have been rotated using the `bevelAngle`.

I don't want to rely on any external libraries like MCAD, BOSL, etc., so everything should be made using core OpenSCAD primitives and the standard operations. I do not want any supports generated.

[Assistant]
clip.scad:
```
clipInnerDiam = 5;
clipThikness = 3;
clipHeight = 20;
clipPercentOverlap = 10;
clipAngle = 60;
bevelAngle = 45;

module clip(id=clipInnerDiam,t=clipThikness,h=clipHeight){

	difference(){
		cylinder(r=id/2+t,h=h,$fn=PI*(id/2+t)*5);
		translate([0,0,-.5])
		cylinder(r=id/2,h=h+1,$fn=PI*id/2*5);
	}
}

module pie(radius, angle, height, spin=0) {
    // Negative angles shift direction of rotation
    clockwise = (angle < 0) ? true : false;
    // Support angles < 0 and > 360
    normalized_angle = abs((angle % 360 != 0) ? angle % 360 : angle % 360 + 360);
    // Select rotation direction
    rotation = clockwise ? [0, 180 - normalized_angle] : [180, normalized_angle];
    // Render
    if (angle != 0) {
        rotate([0,0,spin]) linear_extrude(height=height)
            difference() {
                circle(radius);
                if (normalized_angle < 180) {
                    union() for(a = rotation)
                        rotate(a) translate([-radius, 0, 0]) square(radius * 2);
                }
                else if (normalized_angle != 360) {
                    intersection_for(a = rotation)
                        rotate(a) translate([-radius, 0, 0]) square(radius * 2);
                }
            }
    }
}

difference() {
    union() {
        difference() {
            clip();
            translate([0,0,-.5])
            pie(clipInnerDiam+clipThikness, clipAngle, clipHeight+1, -clipAngle/2);
        }

        for (r=[-clipAngle/2,clipAngle/2]) rotate([0,0,r])
            translate([clipInnerDiam/2+clipThikness/2,0,0])
            cylinder(r=clipThikness/2*(1+clipPercentOverlap/100),h=clipHeight,$fn=PI*clipThikness/2*5);
    }

    rotate([0,-bevelAngle,0])
    translate([0,-clipInnerDiam-clipThikness,-clipHeight-0.5])
    cube([(clipInnerDiam+clipThikness)*2, (clipInnerDiam+clipThikness)*2, clipHeight]);

    translate([0,-clipInnerDiam-clipThikness,clipHeight+0.5])
    rotate([0,bevelAngle,0])
    cube([(clipInnerDiam+clipThikness)*2, (clipInnerDiam+clipThikness)*2, clipHeight]);
}

```


[User]
Hey, I'm looking to generate some custom trays for organizing things, and I'd like to do it parametrically in OpenSCAD. I have a pretty good idea of what I want, but I'm not great at coding.

Essentially, I need a tray with a grid of compartments. Each compartment can be either a circle, a square, or a hexagon. I want to be able to specify the diameter (or side length, for squares) and depth of these compartments. I also need to specify the number of rows and columns for the grid of compartments. The outer tray itself should have rounded edges, with the radius of these rounded edges also being parameterizable.

To save on material, I would like to have the option of adding small, circular holes between each compartment. The diameter of these smaller holes should also be parameterizable (as a ratio of compartment diameter, maybe?), but I'd also like to be able to turn these off entirely.

For example, I'd like to be able to create a tray with 4 columns and 3 rows of circular compartments, where each compartment is 8.2mm in diameter and 12mm deep, with rounded edges of 3mm radius, and have the option to add the intersecting holes. I think I'd like the code to be in one file (with modules for the main parts) for ease.

Let me know if you need any more info.

[Assistant]
trays_grids.scad:
```
// diameter (mm) of holes or sides of square.  Increase this to include printer error
_diam = 8.2;
// depth of holes (mm)
_depth = 12;
// num of columns of holes
_cols = 4;
// num of rows of holes
_rows = 3;

// hole shape
_strShape = "circle";   //[circle,square,hex]
// radius of rounded edges on tray.  If hole shape is squares, use 0 or small number.
_rad_rounded_edge = 3;
// should small holes be placed to save on print material?
_add_intersect_holes = 1; // [1:yes,0:no]

function int_to_bool(n) = n == 1 ? true : false;

module hole(diam, depth, strShape)
{
    if(strShape == "circle")
    {
        cylinder(depth,d=diam, $fn=diam*4);
    }
    else if (strShape == "square")
    {
        translate([-diam/2,-diam/2,0]) cube([diam, diam, depth]);
    }
    else if (strShape == "hex")
    {
        rotate([0,0,15]) cylinder(depth,d=diam, $fn=6);
    }

}
module hole_array(diam, depth, cols, rows, strShape)
{
    for(r=[0: rows - 1])
    {
        translate([0, r * (diam + 1.2),0])
        for(c=[0: cols - 1])
        {
            translate([c * (diam + 1.2) ,0,1.2]) hole(diam, depth + .1, strShape);
        }
    }
}
module intersect_hole(diam, depth)
{
    rotate([0,0,360/16]) cylinder(depth, d=diam/3, $fn=8);
    //diam, depth, cols, rows
}
module intersect_hole_array(diam, depth, cols, rows)
{
    for(r=[0: rows - 2])
    {
        translate([0, r * (diam + 1.2),0])
        for(c=[0: cols - 2])
        {
            translate([c * (diam + 1.2) ,0,1.2]) intersect_hole(diam, depth + .1);
        }
    }
}
module tray(diam=10, depth=10, cols=2, rows =2, strShape = "square", rad_rounded_edge = 0, add_intersect_holes = false)
{

    difference()
    {
        minkowski()
        {
            translate([rad_rounded_edge,rad_rounded_edge,0])
            cube([  ( (diam * cols) + (cols * 1.2) + (1 * 1.2) - (2*rad_rounded_edge))  ,
                      ( (diam * rows) + (rows * 1.2) + (1 * 1.2) - (2*rad_rounded_edge)) ,
                        depth + 1.2]);
            cylinder(.01,r=rad_rounded_edge, $fn=20);
        }
        translate([(diam/2) + 1.2, (diam/2) + 1.2, 0])
            hole_array(diam, depth, cols, rows, strShape);

        if(add_intersect_holes == true)
        {
            translate([diam + ( 1.2 + (1.2/2)) , diam + ( 1.2 + (1.2/2)) ,0])
            intersect_hole_array(_diam, _depth,_cols,_rows);
        }
    }
}

// output the tray
tray(_diam, _depth, _cols, _rows, _strShape, _rad_rounded_edge, int_to_bool(_add_intersect_holes));

```


[User]
I'm looking to create a 3D star shape, but I need it to be customizable. I've been playing around with some designs, and I really like the idea of the center being raised, almost like a small pyramid or cone attached to the middle of the star. It should be something I can print.

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

*   **Number of points:** I want to be able to specify how many points the star has, and it should work with at least 3 points and up.
*   **Point length:** The distance from the center to the tip of the point should be adjustable.
*   **Point width:** I want to be able to tweak the width of the star points, basically adjusting their angle slightly to be more or less acute.
*   **Point height:** This will be the thickness of the star at the very tips of the points.
*  **Center height:** I need to be able to control how high the raised center part is. This should be a separate height from the point height, so I can make the center taller or flatter.
*   **Point roundness:** The tips of the star points should be rounded, and I'd like to be able to control the diameter of that rounding.
*   **Resolution:** I should be able to adjust how smooth the rounded part is, like using $fn in OpenSCAD.

Ideally, the design should avoid rendering issues, especially if I happen to choose a 3-point star without any width adjustment. Maybe you can take that into account in the design so it doesn't try to make a flat shape. I need a single file, not a library or multiple files, since it is a simple object. The file shouldn't use any external libraries.

Can you generate the OpenSCAD code for this?

[Assistant]
star_3d.scad:
```

// number of points on the star (3 or more makes sense)
_points = 7;
// length of ech point from center.  1/2 the rounding value will be added to the length
_point_len = 25;
// used to adjust width of each point +/-
_adjust = 0;
// point height at end of points (thinkness of objet at thinest part. Should be less than cent_h
_pnt_h = 1;
// height at center of star. set equal to pnt_h for flat object
_cent_h = 3;
// diameter of rounding at end of point (must be greater than 0).
_rnd=1;

// resolution for rounded point
_fn = 25;

// modules in library:
module star_3d(points, point_len, adjust=0, pnt_h =1, cent_h=1, rnd=0.1, fn=25)
{
    // star_3d: star with raised center.
    //----------------------------------------------//
    // points = num points on star (should be >3.
    //          Using 3 may require addisional
    //          adjust be applied.)
    // point_len = len of point on star
    //              (actual len of point will add
    //              1/2 rnd to the length.)
    // adjust = +/- adjust of width of point
    // pnt_h = height of star at end of point
    // cent_h = height of star in center needs to be > pnt_h to have effect.
    // rnd = roundness of end of point (diameter)
    // fn = $fn value for rounded point
    //----------------------------------------------//

    point_deg= 360/points;
    point_deg_adjusted = point_deg + (-point_deg/2) +  adjust;

    if(points == 3 && adjust == 0)
    {  // make a pyramid (this is to avoid rendering
       //            issues in this special case)
        hull()
        {
           for(i=[0:2])
           {
               rotate([0,0,i*point_deg])
               translate([point_len,0,0])
                    cylinder(pnt_h, d=rnd, $fn=fn);
           }
           cylinder(cent_h, d=.001);
        }
    }
    else
    { // use algorithm
        for(i=[0:points-1])
        {
            rotate([0,0,i * point_deg])
                translate([0,-point_len,0])
                point(point_deg_adjusted,
                      point_len,
                      rnd,
                      pnt_h,
                      cent_h,
                      fn);
        }
    }

}

module point(deg, leng, rnd, h1, h2, fn=25)
{   // create a point of the star.
    hull()
    {
        cylinder(h1, d=rnd, $fn=fn);
        translate([0,leng,0]) cylinder(h2, d=.001);
        rotate([0,0,-deg/2])
            translate([0,leng,0]) cylinder(h1, d=rnd);
        rotate([0,0,deg/2])
            translate([0,leng,0]) cylinder(h1, d=rnd);
    }
}

// test object:
star_3d(points = _points,
        point_len = _point_len,
        adjust = _adjust,
        pnt_h = _pnt_h,
        cent_h =_cent_h,
        rnd = _rnd,
        fn = _fn);

```


[User]
I'd like to design a customizable LEGO Technic beam using OpenSCAD, based on the existing designs I found on Thingiverse, specifically thing:203935 and a remix of it. I want to be able to specify the hole pattern, the height (full or half), and optionally have some sideways holes.

The basic beam should be a rounded rectangle shape, like the existing design, with a width of about 7.3mm and standard Lego Technic hole spacing of 8mm. The standard hole is a circle with a diameter of about 5mm, with countersinks to about 6.1mm.

The main parameters should be:

*   `holes`: A string specifying the hole pattern. I want to use the following letters:
    *   `o` for a standard round hole.
    *   `+` for a plus-shaped hole, which should be 2mm wide across the vertical and horizontal axes.
    *   `O` for a standard round hole oriented sideways (rotated 90 degrees around the x axis).
    *   `P` for a plus-shaped hole oriented sideways.
    *   `x` for a blank space with no hole.
*   `half_height`: a boolean that, when true, will make the beam half the standard height (standard height is about 7.8mm and half is about 4mm).
*   `$fn`: a variable controlling the number of facets of the cylinders, which can be set by the user (default to something reasonable, like 50).

The beam's height, width and hole diameters should be configurable through variables.
I don't want to be limited to any specific units but if you use millimeters that would be a good default.

Can you provide the OpenSCAD code for this? I don't need any external libraries, just the built-in stuff. Thanks!

[Assistant]
customizable_straight_beam_v4.scad:
```
/*
        Even More Customizable Straight LEGO Technic Beam
        Based on Customizable Straight LEGO Technic Beam
         and Parametric LEGO Technic Beam by "projunk" and "stevemedwin"
        www.thingiverse.com/thing:203935
        Modified by Sam Kass
        November 2015
*/

// user parameters

// Hole sequence. o for round hole, + for plus-shaped hole, capital O for sideways hole, capital P for sideways plus, and x for blank spot. eg. "+ooo+", "oOo", "oxPxo", etc.
holes = "+ooo+"; // 5 holes with plusses at end

// If true, piece will be half-height
half_height="false"; // [true, false]

/* [Hidden] */

$fn=50*1.0;

Pitch = 8*1.0;
Radius1 = 5.0/2;
Radius2 = 6.1/2;
Height = half_height=="true"?4.0:7.8*1.0;
Depth = 0.85*1.0;
Width = 7.3*1.0;
Plus_Width = 2.0*1.0;

Overhang = 0.05*1.0;

module body()
{
    translate([0, Width/2, 0])
    hull() {
        cylinder(r=Width/2, h=Height);

        translate([(len(holes)-1)*Pitch, 0, 0])
            cylinder(r=Width/2, h=Height);
    }
}

module hole()
{
    union()
	{
        //core
        cylinder(r=Radius1,h=Height);

        //top countersink
        translate([0,0,Height-Depth+Overhang])
            cylinder(r=Radius2,h=Depth);

        //bottom countersink
        translate([0,0,-Overhang/2])
            cylinder(r=Radius2,h=Depth);

        translate([0,0,Depth-Overhang])
            cylinder(h=(Radius2 - Radius1), r1=Radius2, r2=Radius1);
    }
}

module plus() {

    union() {
        translate([-Plus_Width/2, -Radius1, -Overhang])
            cube([Plus_Width, Radius1*2, Height+Overhang*2]);
        translate([-Radius1, -Plus_Width/2, -Overhang])
            cube([Radius1*2, Plus_Width, Height+Overhang*2]);
    }
}

module drawBeam()
{
    difference()
    {
        body();

        for (i = [1:len(holes)])
        {
            if (holes[i-1] == "+")
                translate([(i-1)*Pitch, Width/2, 0])
                    plus();
            else if (holes[i-1] == "o")
                translate([(i-1)*Pitch, Width/2, 0])
                    hole();
            else if (holes[i-1] == "O")
                rotate([90,0,0])
                translate([(i-1)*Pitch, Width/2,-Pitch+Depth/2])
                    hole();
            else if (holes[i-1] == "P")
                rotate([90,0,0])
                translate([(i-1)*Pitch, Width/2,-Pitch+Depth/2])
                    plus();
            else if (holes[i-1] == "x") {}
            else
                translate([(i-1)*Pitch, Width/2, 0])
                    hole();
        }
    }
}

drawBeam();

```
customizable_straight_beam_v3.scad:
```
/*
        Even More Customizable Straight LEGO Technic Beam
        Based on Customizable Straight LEGO Technic Beam
         and Parametric LEGO Technic Beam by "projunk" and "stevemedwin"
        www.thingiverse.com/thing:203935
        Modified by Sam Kass
        November 2015
*/

// user parameters
// Lowercase letter o for round hole, and + for a plus-shaped hole.
holes = "+o+";

// If true, piece will be half-height
half_height="false"; // [true, false]

/* [Hidden] */

$fn=50*1.0;

// Parameters modified for best print on my Replicator 2 with PLA
Pitch = 8*1.0;
Radius1 = 5.0/2;
Radius2 = 6.1/2;
Height = half_height=="true"?4.0:7.8*1.0;
Depth = 0.85*1.0;
Width = 7.3*1.0;
Plus_Width = 2.0*1.0;

Overhang = 0.05*1.0;

module body()
{
    translate([0, Width/2, 0])
    hull() {
        cylinder(r=Width/2, h=Height);

        translate([(len(holes)-1)*Pitch, 0, 0])
            cylinder(r=Width/2, h=Height);
    }
}

module hole()
{
    union()
	{
        //core
        cylinder(r=Radius1,h=Height);

        //top countersink
        translate([0,0,Height-Depth+Overhang])
            cylinder(r=Radius2,h=Depth);

        //bottom countersink
        translate([0,0,-Overhang/2])
            cylinder(r=Radius2,h=Depth);

        translate([0,0,Depth-Overhang])
            cylinder(h=(Radius2 - Radius1), r1=Radius2, r2=Radius1);
    }
}

module plus() {

    union() {
        translate([-Plus_Width/2, -Radius1, -Overhang])
            cube([Plus_Width, Radius1*2, Height+Overhang*2]);
        translate([-Radius1, -Plus_Width/2, -Overhang])
            cube([Radius1*2, Plus_Width, Height+Overhang*2]);
    }
}

module drawBeam()
{
    difference()
    {
        body();

        for (i = [1:len(holes)])
        {
            if (holes[i-1] == "+")
                translate([(i-1)*Pitch, Width/2, 0])
                    plus();
            else if (holes[i-1] == "o")
                translate([(i-1)*Pitch, Width/2, 0])
                    hole();
            else if (holes[i-1] == "O")
                rotate([90,0,0])
                translate([(i-1)*Pitch, Width/2,-Pitch+Depth/2])
                    hole();
            else if (holes[i-1] == "P")
                rotate([90,0,0])
                translate([(i-1)*Pitch, Width/2,-Pitch+Depth/2])
                    plus();
            else if (holes[i-1] == "x") {}
            else
                translate([(i-1)*Pitch, Width/2, 0])
                    hole();
        }
    }
}

drawBeam();

```


[User]
I need a parametric mount for an inductive proximity sensor for my 3D printer. I'm using a Fotek PS-05N sensor, and I want to mount it to the side of my 2020 extrusion (OpenBuilds V-Slot). The mount needs to have an adjustment mechanism so I can fine-tune the probe's Z-height.

Here's what I'm thinking, and it's based off a design I have been using:

**Mounting:**

*   The mount attaches to the 2020 extrusion with a single M5 bolt and T-slot nut.
*   There are two M3 mounting holes for the sensor. These are spaced 10.5mm apart.
*   The sensor should be able to move up and down relative to the main mounting body via a flexure system, that allows about 1.5mm of travel up and down from the centered position.
*   The adjustment is done using a single M3 bolt, nut and lock nut which adjusts the position of the shuttle with the captured sensor nut.

**Dimensions:**

*   The vertical distance from the center of the chassis mounting bolt (M5) to the center of the sensor mounting bolts (M3) is a key parameter, I'll call this `distanceToMount`. This needs to be configurable.
*   The overall thickness of the mount should also be configurable. I'll call this `thickness`.
*   I would like rounded edges with a configurable radius, called `filletRadius`
*   The chassis bolt hole needs a recess (counterbore) so I can use a flat head bolt.  This should be a configurable depth and diameter.
*   The tab that mounts to the 2020 extrusion should also be configurable.  I'll need to control the width, height, and thickness, respectively `tabX`, `tabY`, and `tabThickness`.
*  The sensor mounting holes should have recesses for M3 nuts and these should be configurable height and diameter and height, using `nutDiameter`, `nutThickness`, and `nutHeight`.
*  The adjustment bolt and nut need a washer diameter and should be configurable using `washerDiameter`.

**Flexure:**

*   The overall width of the flexure cutout should be configurable (`totalX`).
*   There should be a configurable margin around the flexure cutout called `margin`.
*   The inner shuttle (the part with the sensor nuts that moves) should have a configurable width and height (`shuttleX` and `shuttleY`).
*   The slots in the flexure should have a configurable width (`slotWidth`).
*   The beams in the flexure should be notched, and should be able to control the minimum and maximum width of these beams (`minWidth` and `maxWidth`), as well as the scale of these notches (`notchScale`).
*   The beams will have a nominal length `l`.

**Libraries:**
*   I want to use the `MCAD/metric_fastners.scad` library for standard bolt and nut sizes.

I think I've covered everything. I am happy to answer follow up questions, if you have any.

[Assistant]
FlexureMount.scad:
```
include <MCAD/metric_fastners.scad>

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

/* [Mount Settings] */
// Vertical distance from chassis mounting bolt to probe mounting bolts (center to center)
distanceToMount = 16.4;
// Thickness(height) of the part.
thickness = 8;
// Rounded edges
filletRadius = 2.5;

// Chassis bolt
chassisBoltDiameter = 5.5;
// Recess for chassis bolt
counterBore = 10;
// Chassis mount bolt is on its own tab to the side
tabX = 20;
tabY = 20;
tabThickness = 5;

// Sensor bolt hole spacing
spacing = 10.5;
// Bolt size for sensor and adjustment bolts
boltDiameter = 3.5;
// Nut size for sensor and adjustment bolts
nutDiameter = 5.5;
nutThickness = 2.4;
// How much material under sensor nuts
nutHeight = 4.6;
// Recess for adjustment bolt
washerDiameter = 7.2;

/* [Flexure Settings] */
//part = 4; // [1:Asymmetric,2:Assymetric Folded,3:Symmetric,4:Symmetric 2,5:Symmetric Double,6:Double Shifted]

// Width of flexure portion
totalX = 27;
// Vertical margin around flexure cutout
margin = 2.5;

// Dimensions of the inner shuttle which moves
shuttleX = 18;
shuttleY = 11;

// Slot width determines travel distance in each direction
slotWidth = 1.5;

// Notches narrow down the beams to the minWidth
minWidth = 1.6;
// Thickness of beams where not notched
maxWidth = 1.6;

// Higher notch scaling makes notches in beams wider
notchScale = 2;

/* [Hidden] */
err = 0.02;
// Beam length, may be automatically overriden to longer length if centerSize permits
l = 8;
$fn = 100;

totalY = shuttleY + slotWidth*4 + maxWidth*2 + margin*2;
echo(totalY); // will require a bolt about this length + 5mm

probe_mount();
//display_assembly();

module display_assembly() {
  translate([0,totalY/2+0.3,thickness/2]) rotate([90,0,0]) color("white", 1) washer(3);
  translate([0,-totalY/2,thickness/2]) rotate([90,0,0]) color("white", 1) washer(3);
  translate([0,-totalY/2-0.8*3-0.3,thickness/2]) rotate([-90,0,0])color("red", 1) flat_nut(3);
  translate([spacing/2,0,nutHeight+nutThickness]) rotate([180,0,0]) color("silver", 1) flat_nut(3);
  translate([-spacing/2,0,nutHeight+nutThickness]) rotate([180,0,0]) color("silver", 1) flat_nut(3);
  translate([0,maxWidth-shuttleY/2,thickness/2]) rotate([-90,0,0]) color("silver", 1) flat_nut(3);
  translate([0,totalY/2+0.3,thickness/2]) rotate([90,0,0]) color("black", 1) cap_bolt(3,30);
  color([0,0,1,0.5]) probe_mount();
}

module probe_mount() {
  difference() {
    union() {
      linear_extrude(thickness) translate([0,-totalY/4+distanceToMount/2+tabY/4]) roundedSquare(totalX,totalY/2+distanceToMount+tabY/2,filletRadius,center=true);
      linear_extrude(tabThickness) difference() {
        union() {
          translate([-totalX/2-tabX,distanceToMount-tabY/2]) roundedSquare(tabX,tabY,filletRadius);
          translate([-totalX/2-filletRadius*2,distanceToMount-tabY/2]) square([filletRadius*4,tabY]);
        }
        translate([-tabX/2-totalX/2,distanceToMount]) circle(d=chassisBoltDiameter);
      }
    }
    translate([-spacing/2,0,nutHeight]) rotate([0,0,0]) cylinder(d=nutDiameter*2/sqrt(3), h=thickness, $fn=6);
    translate([spacing/2,0,nutHeight]) rotate([0,0,0]) cylinder(d=nutDiameter*2/sqrt(3), h=thickness, $fn=6);
    translate([-spacing/2,0]) cylinder(d=boltDiameter, h=100, center=true);
    translate([spacing/2,0]) cylinder(d=boltDiameter, h=100, center=true);
    translate([0,maxWidth-shuttleY/2,thickness/2]) rotate([-90,0,0]) {
      rotate([0,0,30]) cylinder(d=nutDiameter*2/sqrt(3), h=nutThickness+err, $fn=6);
      translate([0,thickness/2,nutThickness/2])cube([nutDiameter,thickness,nutThickness], center=true);
    }
    translate([0,0,thickness/2]) rotate([-90,0,0]) cylinder(d=boltDiameter, h=(totalY/2+distanceToMount+tabY/2)*3, center=true);
    translate([0,totalY/2,thickness/2]) rotate([-90,0,0]) cylinder(d=washerDiameter, h=(distanceToMount+tabY/2-totalY/2)*2);

    translate([0,0,-thickness/2]) linear_extrude(thickness*2)
      flexureAsym([shuttleX,shuttleY],slotWidth,l,minWidth,maxWidth,notchScale);
    translate([-totalX/2-tabX/2,distanceToMount,3]) cylinder(d=counterBore, h=tabThickness);
  }
}

module print_part() {

  //%color("red", 0.25) square([shuttleX,shuttleY],center=true); // show shuttle size
  //%color("yellow", 0.25)square([centerSize,totalY],center=true); // show centerSize
  //%color("blue", 0.25) translate([shuttleX/2-maxWidth/2,0]) square([maxWidth,totalY],center=true); // show centerSize
  //%color("blue", 0.25) translate([-shuttleX/2+maxWidth/2,0]) square([maxWidth,totalY],center=true); // show centerSize
  linear_extrude(thickness) difference() {
    roundedSquare(totalX,totalY, 2.5,center=true);
    if (part == 1) {
      flexureAsym([shuttleX,shuttleY],slotWidth,l,minWidth,maxWidth,notchScale);
    } else if (part == 2) {
      flexureAsymFolded([shuttleX,shuttleY],slotWidth,l,minWidth,maxWidth,notchScale);
    } else if (part == 3) {
      flexureSymmetric([shuttleX,shuttleY],slotWidth,l,minWidth,maxWidth,notchScale, centerSize);
    } else if (part == 4) {
      flexureSymmetric2([shuttleX,shuttleY],slotWidth,l,minWidth,maxWidth,notchScale, centerSize);
    } else if (part == 5) {
      flexureSymmetricDouble([shuttleX,shuttleY],slotWidth,l,minWidth,maxWidth,notchScale, centerSize);
    } else if (part == 6) {
      flexureDoubleShifted([shuttleX,shuttleY],slotWidth,l,minWidth,maxWidth,notchScale, centerSize);
    }
  }
}

module roundedSquare(l, w, r,center) {
  x = center ? 0 : l/2;
  y = center ? 0 : w/2;
  translate([x,y]) union() {
    square([l-2*r,w], center=true);
    square([l,w-2*r], center=true);
    // rounded corners
    translate([-l/2+r,-w/2+r]) circle(r = r);
    translate([l/2-r,-w/2+r]) circle(r = r);
    translate([-l/2+r,w/2-r]) circle(r = r);
    translate([l/2-r,w/2-r]) circle(r = r);
  }
}

module beam(l, s, w1, w2, dScale=1) {
  d = (w2 - w1)*dScale;  // can scale d... should this be a parameter?
  x = sqrt( pow(d/2,2) - pow((d+w1-w2)/2,2) );
  intersection() {
    union() {
      // slot above and below beam
      translate([0,(s+w2)/2]) square([l,s], center=true);
      translate([0,-(s+w2)/2]) square([l,s], center=true);
      // semicircle where beam necks down
      translate([-l/2+x,-(d+w1)/2]) circle(d = d);
      translate([l/2-x,-(d+w1)/2]) circle(d = d);
      translate([-l/2+x,(d+w1)/2]) circle(d = d);
      translate([l/2-x,(d+w1)/2]) circle(d = d);
    }
    roundedSquare(l,w2+2*s,s/2,center=true);
  }
}

// Asymmetric in horizontal direction, beam length is determined by shuttle size
module flexureAsym(shuttleSize, slotWidth, beamLength, minWidth, maxWidth, notchScale) {
  shuttleX = shuttleSize[0];
  shuttleY = shuttleSize[1];
  l = (beamLength+maxWidth-slotWidth > shuttleX) ? beamLength : shuttleX-maxWidth+slotWidth;
  a = l/2-shuttleX/2+maxWidth;
  b = (shuttleY+slotWidth)/2;
  c = maxWidth + slotWidth;

  union() {
    translate([a,b+c/2]) beam(l, slotWidth, minWidth, maxWidth, notchScale);
    translate([a,-b-c/2]) beam(l, slotWidth, minWidth, maxWidth, notchScale);

    x1 = shuttleX/2+slotWidth/2;
    // outer side slots
    translate([x1,0]) square([slotWidth, b*2],center=true);
    translate([-x1,0]) square([slotWidth, (b+c)*2],center=true);
    // rounded corners for outer slot path
    translate([-x1,b+c]) circle(d=slotWidth);
    translate([-x1,-b-c]) circle(d=slotWidth);

    x2 = x1+a;
    // connect outer side slots to beamSlots horizontally
    translate([a-x2/2,b+c]) square([x2,slotWidth], center=true);
    translate([a-x2/2,-b-c]) square([x2,slotWidth], center=true);
  }
}

// Asymmetric in horizontal direction, beam length is determined by shuttle size
module flexureAsymFolded(shuttleSize, slotWidth, beamLength, minWidth, maxWidth, notchScale) {
  shuttleX = shuttleSize[0];
  shuttleY = shuttleSize[1];
  l = (beamLength + 2*maxWidth > shuttleX) ? beamLength : shuttleX - 2*maxWidth;
  a = shuttleX/2-l/2-maxWidth;
  b = (shuttleY + maxWidth)/2 + slotWidth;
  c = (maxWidth + slotWidth)/2;

  union() {
    translate([a,-b-2*c]) beam(l, slotWidth, minWidth, maxWidth, notchScale);
    translate([a,-b]) beam(l, slotWidth, minWidth, maxWidth, notchScale);
    translate([a,b]) beam(l, slotWidth, minWidth, maxWidth, notchScale);
    translate([a,b+2*c]) beam(l, slotWidth, minWidth, maxWidth, notchScale);

    x1 = shuttleX/2+slotWidth/2;
    // outer side slots
    translate([x1,0]) square([slotWidth, 2*b+2*c],center=true);
    translate([-x1,0]) square([slotWidth, 2*b-2*c],center=true);

    // rounded corners for outer slot path
    //translate([-x1,b+3*c]) circle(d=slotWidth);
    //translate([-x1,-b-3*c]) circle(d=slotWidth);
    translate([x1,b+c]) circle(d=slotWidth);
    translate([x1,-b-c]) circle(d=slotWidth);

    x2 = x1-a;
    // connect outer side slots to beamSlots horizontally
    translate([x1-x2/2,b+c]) square([x2,slotWidth], center=true);
    translate([x1-x2/2,-b-c]) square([x2,slotWidth], center=true);

    x3 = a-l/2-maxWidth/2;
    translate([x3,b+3*c]) square([2*c,slotWidth], center=true);
    translate([x3,-b-3*c]) square([2*c,slotWidth], center=true);
    translate([x3,b-c]) square([2*c,slotWidth], center=true);
    translate([x3,-b+c]) square([2*c,slotWidth], center=true);

    translate([x3-c,-b-c]) square([slotWidth, 4*c],center=true);
    translate([x3-c,b+c]) square([slotWidth, 4*c],center=true);

    // rounded corners for outer slot path
    translate([x3-c,b+3*c]) circle(d=slotWidth);
    translate([x3-c,-b-3*c]) circle(d=slotWidth);
    translate([x3-c,b-c]) circle(d=slotWidth);
    translate([x3-c,-b+c]) circle(d=slotWidth);

  }
}

module flexureSymmetric(shuttleSize, slotWidth, beamLength, minWidth, maxWidth, notchScale, centerSize) {
  shuttleX = shuttleSize[0];
  shuttleY = shuttleSize[1];
  l = (2*beamLength+centerSize+2*maxWidth > shuttleX) ? beamLength : (shuttleX - 2*maxWidth - centerSize)/2;
  a = (centerSize + l)/2;
  b = (centerSize > shuttleX) ? shuttleY/2 : (shuttleY + slotWidth)/2;
  c = (slotWidth + maxWidth)/2;

  union() {
    // horizontal slots with rounded holes on end
    translate([-a,-b-c]) beam(l, slotWidth, minWidth, maxWidth, notchScale);
    translate([a,-b-c]) beam(l, slotWidth, minWidth, maxWidth, notchScale);
    translate([-a,b+c]) beam(l, slotWidth, minWidth, maxWidth, notchScale);
    translate([a,b+c]) beam(l, slotWidth, minWidth, maxWidth, notchScale);

    // center slots
    translate([0,b]) square([a*2-l+slotWidth, slotWidth],center=true);
    translate([0,-b]) square([a*2-l+slotWidth, slotWidth],center=true);

    // outer vertical slots
    translate([a+l/2+slotWidth/2+maxWidth,0]) square([slotWidth, shuttleY+4*c+slotWidth],center=true);
    translate([-a-l/2-slotWidth/2-maxWidth,0]) square([slotWidth, shuttleY+4*c+slotWidth],center=true);

    // connect outer vertical slots to outer horizontal slots
    translate([a+l/2+c-slotWidth/2,b+2*c]) square([2*c, slotWidth],center=true);
    translate([-a-l/2-c+slotWidth/2,b+2*c]) square([2*c, slotWidth],center=true);
    translate([a+l/2+c-slotWidth/2,-b-2*c]) square([2*c, slotWidth],center=true);
    translate([-a-l/2-c+slotWidth/2,-b-2*c]) square([2*c, slotWidth],center=true);

    // rounded corners for outer slot path
    translate([a+l/2+maxWidth+slotWidth/2,b+2*c]) circle(d=slotWidth);
    translate([-a-l/2-maxWidth-slotWidth/2,b+2*c]) circle(d=slotWidth);
    translate([a+l/2+maxWidth+slotWidth/2,-b-2*c]) circle(d=slotWidth);
    translate([-a-l/2-maxWidth-slotWidth/2,-b-2*c]) circle(d=slotWidth);
  }
}

// inside-out version of flexureSymmetric
module flexureSymmetric2(shuttleSize, slotWidth, beamLength, minWidth, maxWidth, notchScale, centerSize) {
  shuttleX = shuttleSize[0];
  shuttleY = shuttleSize[1];
  l = (2*beamLength+centerSize-2*slotWidth > shuttleX) ? beamLength : (shuttleX - centerSize)/2 + slotWidth;
  a = (centerSize + l)/2;
  c = (slotWidth + maxWidth)/2;
  b = (centerSize >= shuttleX) ? shuttleY/2-2*c+slotWidth/2 : (shuttleY + slotWidth)/2;

  union() {
    // horizontal slots with rounded holes on end
    translate([-a,-b-c]) beam(l, slotWidth, minWidth, maxWidth, notchScale);
    translate([a,-b-c]) beam(l, slotWidth, minWidth, maxWidth, notchScale);
    translate([-a,b+c]) beam(l, slotWidth, minWidth, maxWidth, notchScale);
    translate([a,b+c]) beam(l, slotWidth, minWidth, maxWidth, notchScale);

    // center slots
    translate([0,b+2*c]) square([a*2-l+slotWidth, slotWidth],center=true);
    translate([0,-b-2*c]) square([a*2-l+slotWidth, slotWidth],center=true);

    x1 = shuttleX/2+slotWidth/2;
    // outer vertical slots
    translate([x1,0]) square([slotWidth, 2*b],center=true);
    translate([-x1,0]) square([slotWidth, 2*b],center=true);
    // rounded corners for outer slot path
    translate([x1,b]) circle(d=slotWidth);
    translate([-x1,b]) circle(d=slotWidth);
    translate([x1,-b]) circle(d=slotWidth);
    translate([-x1,-b]) circle(d=slotWidth);
    l1 = centerSize;
    // connect outer vertical slots to outer horizontal slots
    translate([(x1+a)/2,b]) square([abs(x1-a), slotWidth],center=true);
    translate([-(x1+a)/2,b]) square([abs(x1-a), slotWidth],center=true);
    translate([(x1+a)/2,-b]) square([abs(x1-a), slotWidth],center=true);
    translate([-(x1+a)/2,-b]) square([abs(x1-a), slotWidth],center=true);
  }
}

module flexureSymmetricDouble(shuttleSize, slotWidth, beamLength, minWidth, maxWidth, notchScale, centerSize) {
  shuttleX = shuttleSize[0];
  shuttleY = shuttleSize[1];
  l = (2*beamLength+centerSize-2*slotWidth > shuttleX) ? beamLength : (shuttleX+2*slotWidth-centerSize)/2;
  a = (centerSize + l)/2; // horizontal offset of center of beam from center of shuttle
  b = (centerSize >= shuttleX) ? shuttleY/2-maxWidth/2 : shuttleY/2+slotWidth+maxWidth/2; // vertical offset of first beam nearest shuttle
  c = (slotWidth + maxWidth)/2; // half the vertical distance between beams
  e = max(a+l/2+slotWidth/2+maxWidth, shuttleX/2+slotWidth/2+maxWidth+slotWidth); // horizontal offset of outer

  union() {
    // horizontal slots with rounded holes on end
    translate([-a,-b-2*c]) beam(l, slotWidth, minWidth, maxWidth, notchScale);
    translate([a,-b-2*c]) beam(l, slotWidth, minWidth, maxWidth, notchScale);
    translate([-a,-b]) beam(l, slotWidth, minWidth, maxWidth, notchScale);
    translate([a,-b]) beam(l, slotWidth, minWidth, maxWidth, notchScale);
    translate([-a,b]) beam(l, slotWidth, minWidth, maxWidth, notchScale);
    translate([a,b]) beam(l, slotWidth, minWidth, maxWidth, notchScale);
    translate([-a,b+2*c]) beam(l, slotWidth, minWidth, maxWidth, notchScale);
    translate([a,b+2*c]) beam(l, slotWidth, minWidth, maxWidth, notchScale);

    // center slots
    translate([0,b+c]) square([a*2-l+slotWidth, slotWidth],center=true);
    translate([0,-b-c]) square([a*2-l+slotWidth, slotWidth],center=true);

    // outer vertical side slots
    translate([-e,0]) square([slotWidth, 2*b+6*c],center=true);
    translate([e,0]) square([slotWidth, 2*b+6*c],center=true);
    // connect outer vertical slots to outer horizontal slots
    translate([-(e+a)/2,-b-3*c]) square([e-a, slotWidth],center=true);
    translate([(e+a)/2,-b-3*c]) square([e-a, slotWidth],center=true);
    translate([-(e+a)/2,b+3*c]) square([e-a, slotWidth],center=true);
    translate([(e+a)/2,b+3*c]) square([e-a, slotWidth],center=true);
    // rounded corners for outer slot path
    translate([e,-b-3*c]) circle(d=slotWidth);
    translate([-e,-b-3*c]) circle(d=slotWidth);
    translate([e,b+3*c]) circle(d=slotWidth);
    translate([-e,b+3*c]) circle(d=slotWidth);

    x3 = (shuttleX/2+slotWidth/2);
    // Slots for sides of shuttle
    translate([-x3,0]) square([slotWidth, 2*b-2*c],center=true);
    translate([x3,0]) square([slotWidth, 2*b-2*c],center=true);
    // connext shuttle side slots horizontally
    translate([-(x3+a)/2,-b+c]) square([abs(x3-a), slotWidth],center=true);
    translate([(x3+a)/2,-b+c]) square([abs(x3-a), slotWidth],center=true);
    translate([-(x3+a)/2,b-c]) square([abs(x3-a), slotWidth],center=true);
    translate([(x3+a)/2,b-c]) square([abs(x3-a), slotWidth],center=true);
    // rounded corners for inner slot path
    translate([x3,b-c]) circle(d=slotWidth);
    translate([-x3,b-c]) circle(d=slotWidth);
    translate([x3,-b+c]) circle(d=slotWidth);
    translate([-x3,-b+c]) circle(d=slotWidth);
  }
}

module flexureDoubleShifted(shuttleSize, slotWidth, beamLength, minWidth, maxWidth, notchScale, centerSize) {
  shuttleX = shuttleSize[0];
  shuttleY = shuttleSize[1];
  l = (2*beamLength+centerSize-2*slotWidth > shuttleX) ? beamLength : (shuttleX+2*slotWidth-centerSize)/2;
  a = (centerSize + l)/2; // horizontal offset of center of beam from center of shuttle
  b = (centerSize >= shuttleX) ? shuttleY/2-maxWidth/2 : shuttleY/2+slotWidth+maxWidth/2; // vertical offset of first beam nearest shuttle
  c = (slotWidth + maxWidth)/2; // half the vertical distance between beams
  e = max(a+l/2+slotWidth/2+maxWidth, shuttleX/2+slotWidth/2+maxWidth+slotWidth); // horizontal offset of outer

  offset = (centerSize >= shuttleX) ? 2*c : 0;
  //translate([0,offset])
  union() {
    // horizontal slots with rounded holes on end
    translate([-a,-b-2*c]) beam(l, slotWidth, minWidth, maxWidth, notchScale);
    translate([a,-b-2*c]) beam(l, slotWidth, minWidth, maxWidth, notchScale);
    translate([-a,-b]) beam(l, slotWidth, minWidth, maxWidth, notchScale);
    translate([a,-b]) beam(l, slotWidth, minWidth, maxWidth, notchScale);
    translate([-a,b]) beam(l, slotWidth, minWidth, maxWidth, notchScale);
    translate([a,b]) beam(l, slotWidth, minWidth, maxWidth, notchScale);
    translate([-a,b+2*c]) beam(l, slotWidth, minWidth, maxWidth, notchScale);
    translate([a,b+2*c]) beam(l, slotWidth, minWidth, maxWidth, notchScale);

    // center slots
    translate([0,b-c]) square([a*2-l+slotWidth, slotWidth],center=true);
    translate([0,-b-3*c]) square([a*2-l+slotWidth, slotWidth],center=true);

    // outer vertical side slots
    translate([-e,0]) square([slotWidth, 2*b+6*c],center=true);
    translate([e,0]) square([slotWidth, 2*b+6*c],center=true);
    // connect outer vertical slots to outer horizontal slots
    translate([-(e+a)/2,-b-3*c]) square([e-a, slotWidth],center=true);
    translate([(e+a)/2,-b-3*c]) square([e-a, slotWidth],center=true);
    translate([-(e+a)/2,b+3*c]) square([e-a, slotWidth],center=true);
    translate([(e+a)/2,b+3*c]) square([e-a, slotWidth],center=true);
    // rounded corners for outer slot path
    translate([e,-b-3*c]) circle(d=slotWidth);
    translate([-e,-b-3*c]) circle(d=slotWidth);
    translate([e,b+3*c]) circle(d=slotWidth);
    translate([-e,b+3*c]) circle(d=slotWidth);

    x3 = (shuttleX/2+slotWidth/2);
    // Slots for sides of shuttle
    translate([-x3,0]) square([slotWidth, 2*b-2*c],center=true);
    translate([x3,0]) square([slotWidth, 2*b-2*c],center=true);
    // connext shuttle side slots horizontally
    translate([-(a+x3)/2,-b+c]) square([abs(x3-a), slotWidth],center=true);
    translate([(a+x3)/2,-b+c]) square([abs(x3-a), slotWidth],center=true);
    translate([-(a+x3)/2,b-c]) square([abs(x3-a), slotWidth],center=true);
    translate([(a+x3)/2,b-c]) square([abs(x3-a), slotWidth],center=true);
    // rounded corners for inner slot path
    translate([x3,b-c]) circle(d=slotWidth);
    translate([-x3,b-c]) circle(d=slotWidth);
    translate([x3,-b+c]) circle(d=slotWidth);
    translate([-x3,-b+c]) circle(d=slotWidth);
  }
}

```


[User]
Hey, I'm looking to design some simple fence-like clips that will attach to the guard rails on my fridge's door. I've already got a basic idea laid out in OpenSCAD, but I need your help in generating the actual parametric files.

The basic idea is that the fence will clip onto the existing rail using two "posts," one on each side of the rail. One post will have a shorter section extending out toward the inside of the fridge to act as a simple stop, while the other post should extend further and also wrap over the top of the rail to hold the fence in place.

Here are the parameters I'm thinking we should be able to adjust:

*   `quality`: This is just to control the curve smoothness, I'm thinking 1 (draft), 2 (meh), and 3 (best).
*   `rail_thickness`: The thickness of the existing rail on the fridge.
*   `rail_height`: The height of the existing rail on the fridge.
*   `rail_edge_radius`: The radius of the rounded corners of the rail's cross-section.
*   `fence_post_inner_height`: The height of the main part of the fence post on the inside of the fridge.
*   `fence_post_outer_height`: The height of the clip portion that wraps over the rail on the outside of the fridge.
*   `fence_post_length`: The length of the rail covered by the fence post.
*   `fence_post_thickness`: How thick the fence post is, the distance of the exterior edges of the post from the interior edges.

I think it would be useful to have a `rounded_square` module to make the various parts of the design with rounded edges. It would accept a dimensions vector (x,y), a radius, and a thickness.

I think it should be a single `fridge_door_fence.scad` file and shouldn't need any other libraries.

I've included the code from what I've been working on to show you what I have in mind, but it's a bit rough so feel free to ignore it, or use it as a guide.

[Assistant]
fridge_door_fence.scad:
```
//Curve smoothness, from 1 to 3.
quality = 3; //[1:draft, 2:meh, 3:best]

//Thickness of the rail. Used as the interior distance between the inner and outer sides of the fence posts.
rail_thickness = 8;
//Height of the rail from top face to bottom face.
rail_height = 25.4;
//Radius of each of the corners of the rail's cross-section.
rail_edge_radius = 1;

//Height of each of the fence posts.
fence_post_inner_height = 55;
//Height of the clip portion, on the other side of the rail.
fence_post_outer_height = 10;

//Length on the rail covered by the fence post.
fence_post_length = 25;

//Thickness of the fence post—the distance of the exterior edges of the post from the interior edges/the rail.
fence_post_thickness = 2;

module rounded_square(dims, r=2, thickness=1) {
	hull() {
		translate([0, 0, thickness * 0.5]) {
			translate([dims[0] * -0.5 + r, dims[1] * -0.5 + r, 0]) cylinder(r=r, h=thickness, center=true);
			translate([dims[0] * +0.5 - r, dims[1] * -0.5 + r, 0]) cylinder(r=r, h=thickness, center=true);
			translate([dims[0] * -0.5 + r, dims[1] * +0.5 - r, 0]) cylinder(r=r, h=thickness, center=true);
			translate([dims[0] * +0.5 - r, dims[1] * +0.5 - r, 0]) cylinder(r=r, h=thickness, center=true);
		}
	}
}

module rail() {
color("white")
rounded_square([rail_thickness, rail_height], r=rail_edge_radius, thickness=fence_post_length * 2);
}

difference() {
union() {
rounded_square([rail_thickness + fence_post_thickness / 2, fence_post_inner_height], r=rail_edge_radius * 2, thickness=fence_post_length);
//color("red")
translate([fence_post_thickness, fence_post_inner_height * 0.5 - fence_post_outer_height * 0.5 + 0.05, -0.05])
rounded_square([rail_thickness + fence_post_thickness * 2, fence_post_outer_height], r=rail_edge_radius * 2, thickness=fence_post_length + 0.1);
}

*translate([fence_post_thickness - rail_edge_radius, (fence_post_inner_height * 0.5 - rail_height * 0.5) - rail_edge_radius, 0])
rail();

translate([fence_post_thickness, -fence_post_thickness, fence_post_length * -0.5])
//color("blue")
rounded_square([rail_thickness, fence_post_inner_height], r=rail_edge_radius, thickness=fence_post_length * 2);
}
```


[User]
Hey there, I'm looking to create a parametric OpenSCAD design for a magnet encoder disc, kind of like the one shown in [this video](https://youtu.be/Dt1ybvIDO-A). I’ve been fiddling around with something simple but want to make it more robust.

I need a disc with a central hole for a shaft and indents for magnets around its perimeter. Ideally, I'd like to be able to control the following parameters:

*   **disc\_dia:** The overall diameter of the disc.
*   **disc\_thickness:** The thickness of the disc.
*   **shaft\_dia:** The diameter of the shaft that the disc will be mounted on.
*   **magnet\_indent\_side:** An option to select whether the magnet indents are on the top or bottom surface of the disc (the "top" will have a collar). It should be 1 for top, and 0 for bottom.
*   **magnet\_dia:** The diameter of the magnets to be inserted.
*   **magnet\_depth:** The depth of the magnet indents.
*  **magnet\_margin:** The distance between the outer edge of the disc and the edge of the magnet indents.
*   **num\_magnets:** The number of magnets to be embedded in the disc.
*   **collar\_thickness:** The thickness of a collar at the base of the shaft opening.
*   **collar\_length:** The length of the collar.

The design should use `difference()` to create the magnet indentations and the central shaft hole. The magnet indents should be placed evenly around the perimeter of the disc, and the collar should extend from the shaft hole. I don't want to rely on any libraries in this case. Could you generate the OpenSCAD code for this?

[Assistant]
magnet-encoder-disc.scad:
```
$fn=64*1;
E=0.05*1;

// Diameter of the disc as a whole
disc_dia = 40;

// How thick the disc as a whole is (mm)
disc_thickness=2;

// Diameter of the shaft passing through the disc (possibly plus some margin, e.g. ~5%)
shaft_dia = 6.4;

// Which side to put the indents for the magnets? The top is the side with the collar.
magnet_indent_side = 1; // [1:Top, 0:Bottom]

// Diameter of the magnets (plus some margin, usualy ~10%)
magnet_dia = 5.5;

// Depth of the magnet indents (mm)
magnet_depth = 0.5;

// How far between the edge of the disc and the edge of the magnets (mm)
magnet_margin = 2;

// Number of magnet indents
num_magnets = 8;

// How thick the collar should be (mm)
collar_thickness = 0.75;

// How long the collar should be (mm)
collar_length=5;

magnet_center_radius = disc_dia/2 - magnet_margin - magnet_dia/2;

difference() {
    union() {
        cylinder(d=disc_dia,h=disc_thickness);
        cylinder(d=shaft_dia+2*collar_thickness,h=disc_thickness+collar_length);
    }
    translate([0,0,-E]) cylinder(d=shaft_dia,h=20);
    for (theta = [0:360/num_magnets:360-1]) rotate(theta) {
        magnet_z = magnet_indent_side ? disc_thickness-magnet_depth : -E/2;
        translate([magnet_center_radius,0,magnet_z]) cylinder(d=magnet_dia,h=magnet_depth+E);
    }
}

```


[User]
Hey, I'm looking to create a customizable corner bracket for 3D printing, and I'd like to have it generated using OpenSCAD. I'd like to be able to adjust a few key parameters so I can adapt it to different projects.

Specifically, I need to control:

*   **Bracket Width (c_w):** The overall width of the bracket, in millimeters.
*   **Bracket Height (c_h):** The overall height of the bracket, in millimeters.
*   **Bracket Depth (c_d):** The thickness of the bracket material, in millimeters.
*   **Bolt Hole Diameter (diameter):** The diameter of the bolt holes, in millimeters.
*   **Number of Bolt Holes (bolt_holes):** An option for 0, 1, or 2 bolt holes.
*   **Bolt Hole Separation (seperation):** The distance between bolt holes, in millimeters, if using two holes.

The bracket should have a rounded tip at the top of each bracket arm to help reduce sharp corners and look better. There should also be a small chamfer on the inside corner to remove the sharp edge there. Also, it's important that this design is printable without requiring supports. I'd like all of this to be generated in a single .scad file.

I'm also a little worried about the bolt hole placement. The original design puts the bolt hole edges rather close to the bracket edge. I'd like the *distance* from the bolt hole edge to the edge of the bracket to be a minimum of 1/2 of the `diameter`. I think this will be useful to ensure that the bracket wall isn't too thin at the bolt hole when printed. Could you generate the file to take this into account?

Do you think you can handle this?

[Assistant]
Bracket_Corner_OpenSCAD_4.scad:
```
/*
Adjustable Corner Bracket -- Version 2
* Print Unsupported
* by Harlo_DX
* 9/11/2015
*/

//brackets sizing
//Width in of the bracket (mm):
c_w = 5.5; //[5:0.5:100]
//Height of the bracket (mm):
c_h = 20; //[11:0.5:100]
//Depth of the bracket (mm):
c_d = 3; //[0.5:0.25:20]

//Bolt hole diameter in mm:
diameter = 2.5; //[0.25:0.25:30]

//Number of bolt holes:
bolt_holes = 2; //[0,1,2]

//Extra space between bolts:
seperation = 3; //[0.5:0.25:20]

////////////////////
//INTERNAL VARIABLES
////////////////////

hole_size = diameter/2; //radius (multiply by 2 for the diameter)
multiplier = 1*1;  // affects the smoothness of the chamfer -- keep turning up **gradually** to reduce sharp edges.
spread = c_h/5; //NOT FINAL

//////////////////////////////
////////////////////////RENDER
//////////////////////////////

rotate([0,-90,180]){
// initial side of bracket
cut_bracket(); //WORKING
// internal chamfer
corner_chamfer(); //WORKING

//bottom bracket  //WORKING
translate([0,c_d,0]){
    rotate (90, [1,0,0]){ // handles the pivot action
        cut_bracket();
        }
    }
}
//////////////////////////////
/////////////////////FUNCTIONS
//////////////////////////////

module corner_chamfer () {

    difference(){
    //cube
    translate([0,-c_d,0]){
    cube([c_w, c_d*2, c_d*2], false);
    }

    //cylinder
    translate([-0.5,-c_d,c_d*2]){
        rotate(90, [0,1,0]){
        cylinder(c_w+1, c_d*multiplier, c_d*multiplier, false, $fn = 100);
        }
    }
}

}

module cut_bracket(){
    difference(){
        union(){
            //corner_chamfer(); //TEST
            bracket_side(); //WORKING
        }
        if (bolt_holes == 1){
            cut_out();
        }

        if (bolt_holes == 2){
        dual_cut_out();
        }
}
}

module bracket_side () {
    cube([c_w, c_d, c_h], false);
    curved_tip();
}

module curved_tip () {
        translate([0,c_d/2,c_h]){
            rotate(90, [0,1,0]){
                cylinder(c_w, (c_d/2)*multiplier, (c_d/2)*multiplier, false, $fn = 100);
                }
           }
    }

module dual_cut_out(){
        translate([0, 0, -(hole_size + seperation)]){
        cut_out();
        }
        translate([0, 0, hole_size + seperation]){
        cut_out();
        }
        }

module cut_out (){

    //This hull function lets you print without support
    hull(){

        $fn=100; //defines resolution

    translate([
        c_w/2
        ,c_d+1
        ,(c_h +(c_w/2)+(hole_size/2))*0.5]){
        rotate(90, [1,0,0]){
            cylinder(c_d+5, hole_size, hole_size, false);
        }
    }

    translate([
    (c_w/2)+((hole_size)*1.5) //Shifts across by an extra 50% of the hole_size value
    ,c_d+1
    ,(c_h+(c_w/2)+(hole_size/2))*0.5])
        {
        rotate(90, [1,0,0]){
            cylinder(c_d+5, hole_size*0.01, hole_size*0.01, false);
        }
    }
}

}
```


[User]
I need a parametric OpenSCAD module for creating Openbeam plates. I want to be able to specify the width and height of the plate in terms of the number of Openbeam holes, as well as the overall thickness of the plate and the thickness of the bottom part of the plate. Also, I'd like to control whether the center part of the plate has holes or is solid for plates larger than 2x2. Basically, I want to replicate the functionality I have in the attached `plate-one-file.scad` file, but written from scratch by you.

The design should include the following parameters:

*   `plate_width`: The width of the plate in Openbeam hole units.
*   `plate_height`: The height of the plate in Openbeam hole units.
*   `plate_thickness`: The total thickness of the plate in mm.
*   `bottom_thickness`: The thickness of the bottom portion of the plate in mm.
*   `solid_center`: A boolean flag to control whether the central area of plates larger than 2x2 has holes. `0` for holes, `1` for solid.

The module should use `rounded_xy_cube` function that creates a cube with rounded xy edges and should also use `openbeam_screw_hole` function to make the screw holes for each position. The module will also need the `openbeam_w` value and `hole_extra_size` to create the holes. All these functions and values are in the `plate-one-file.scad` file.

I would like it if you could structure the output into multiple files, one containing the plate module, another the core functions like rounded_xy_cube and openbeam_screw_hole, and a top-level file demonstrating usage. I do not want to use any external libraries for this project.

[Assistant]
plate-one-file.scad:
```
// The width of the plate, in Openbeam holes
plate_width=3;

// The height of the plate, in Openbeam holes
plate_height=3;

// the thickness of the plate, in mm
plate_thickness=4;

// the thickness of the bottom, in mm
bottom_thickness=2;

// Whether the center part of a plate bigger than 2x2 has holes or is solid.
solid_center=0; // [0:false, 1:true]

$fn=40;

openbeam_plate([plate_width, plate_height], h=plate_thickness, solid_center=solid_center);

// Library: boxes.scad
// Version: 1.0
// Author: Marius Kintel
// Copyright: 2010
// License: 2-clause BSD License (http://opensource.org/licenses/BSD-2-Clause)

// roundedBox([width, height, depth], float radius, bool sidesonly);

// EXAMPLE USAGE:
// roundedBox([20, 30, 40], 5, true);

// size is a vector [w, h, d]
module roundedBox(size, radius, sidesonly)
{
  rot = [ [0,0,0], [90,0,90], [90,90,0] ];
  if (sidesonly) {
    cube(size - [2*radius,0,0], true);
    cube(size - [0,2*radius,0], true);
    for (x = [radius-size[0]/2, -radius+size[0]/2],
           y = [radius-size[1]/2, -radius+size[1]/2]) {
      translate([x,y,0]) cylinder(r=radius, h=size[2], center=true);
    }
  }
  else {
    cube([size[0], size[1]-radius*2, size[2]-radius*2], center=true);
    cube([size[0]-radius*2, size[1], size[2]-radius*2], center=true);
    cube([size[0]-radius*2, size[1]-radius*2, size[2]], center=true);

    for (axis = [0:2]) {
      for (x = [radius-size[axis]/2, -radius+size[axis]/2],
             y = [radius-size[(axis+1)%3]/2, -radius+size[(axis+1)%3]/2]) {
        rotate(rot[axis])
          translate([x,y,0])
          cylinder(h=size[(axis+2)%3]-2*radius, r=radius, center=true);
      }
    }
    for (x = [radius-size[0]/2, -radius+size[0]/2],
           y = [radius-size[1]/2, -radius+size[1]/2],
           z = [radius-size[2]/2, -radius+size[2]/2]) {
      translate([x,y,z]) sphere(radius);
    }
  }
}

//////////////////////////////////////////////////////////////////
/// tools.scad

openbeam_w=15;
hole_extra_size=0.50;

module rounded_xy_cube(size, r, center=false) {
  offset = center ? 0 : r;

  translate([offset, offset, 0]) {
    minkowski() {
      cube(size - [r*2, r*2, 0], center);
      cylinder(r=r, h=0.00001);
    }
  }
}

module openbeam_screw_hole(screw_shaft=3, screw_head=5.5,
                           screw_height=6, screw_head_height=3) {
  translate([0, 0, -screw_height])
    cylinder(r=(screw_shaft+hole_extra_size)/2, h=screw_height+0.05);
  cylinder(r=(screw_head+hole_extra_size)/2, h=screw_head_height+0.05);
}

//////////////////////////////////////////////////////////////////
/// plate.scad

module openbeam_plate(grid_size, h=4, solid_center=true) {
  size = [grid_size[0] * openbeam_w, grid_size[1] * openbeam_w, h];
  difference() {
    rounded_xy_cube(size, 4);

    // holes on the sides
    for (x = [0 : grid_size[0] - 1],
         y = [0 : grid_size[1] - 1]) {
      if (!solid_center
          || x == 0 || x == grid_size[0] - 1
          || y == 0 || y == grid_size[1] - 1) {
        translate([x * openbeam_w + openbeam_w/2,
                   y * openbeam_w + openbeam_w/2, 0]) {
          translate([0, 0, bottom_thickness]) {
            openbeam_screw_hole(screw_height=h+0.05, screw_head_height=h+0.05);
          }
        }
      }
    }
  }
}

```


[User]
I need a tool holder designed in OpenSCAD. It's for a set of those cheap "precision" tools, you know, the kind with the cylindrical bodies. I've included a rough concept as a starting point.

Here's what I need:

*   **Individual Holders:** The design should create multiple individual holders, each consisting of a cylinder with a cutout for holding the tool. The cutout should have a rectangular shape protruding out from the cylinder.
*   **Parametric Count:** The number of individual holders should be adjustable via a parameter.
*   **Holder Spacing:** The spacing between each of the individual holders should also be a parameter.
*   **Holder Size:** The diameter of the cylindrical portion of the holder and the dimensions of the rectangular cutout should all be parameters.
*   **Base Structure:** The individual holders should be joined by a base that extends along the entire length of the holder array, and is located on either side of all the holders. This base should also be parametric in its height and width.
*  **Screw Holes:** The base should include screw holes on the very left and right sides. There should be three nail holes in the center for nails, one each at 1/4th, 1/2, and 3/4th lengths of the entire part.

*   **Material Considerations:** I'd like the design to be reasonably robust, with some thought given to the strength of the connecting "base" structure.
*   **OpenSCAD Libraries:** Please use the `BOSL2` library for its robust parameterization and ease of use.

Basically, I want to be able to customize the whole holder: how many tools it holds, how much space there is between them, how big the tool holders are, and how sturdy the base is.

[Assistant]
toolholder.scad:
```
$fn=40;
height=12;
//tends to break. should be a little bit stronger but might then be too stiff.
strength=1;

//we start the for loop with 0 thus the resulting amount is one more.
amount=14;

difference()
{
    for(i=[0:1:amount])
    {
        translate([(5+2*strength+1.5)*i,0,0])halter();
    }
    //Nailhole 1/4
    translate([(amount*(1/4))*(5+2*strength+1.5),10,height/2])rotate([90,0,0])cylinder(r=1.5/2,h=10);
    //Nailhole center
    translate([(amount/2)*(5+2*strength+1.5),10,height/2])rotate([90,0,0])cylinder(r=1.5/2,h=10);
    //Nailhole 3/4
    translate([(amount*(3/4))*(5+2*strength+1.5),10,height/2])rotate([90,0,0])cylinder(r=1.5/2,h=10);
}

difference()
{
    union(){
translate([-(2+5+2*strength+1.5+1),5/2,0])cube([2+1+5+2*strength+1.55,strength*2,height]);
translate([(amount)*(5+2*strength+1.5),5/2,0])cube([2+5+2*strength+1.55,strength*2,height]);
    }
    //Screwhole left
    translate([-2-6,10,height/2])rotate([90,0,0])cylinder(r=4/2,h=10);

    //Screwhole right
    translate([1+6+(amount)*(5+2*strength+1.5),10,height/2])rotate([90,0,0])cylinder(r=4/2,h=10);
}
module halter()
{
    difference()
    {
        union()
        {
            cylinder(r=5/2+strength,h=height);
            translate([-2.5-strength,5/2,0])cube([5+2*strength+1.55,strength*2,height]);
        }
        cylinder(r=5/2,h=height);
        rotate([0,0,15])translate([-(strength*2)/2,-9/2,0])cube([strength*2,10/2,height]);

        rotate([0,0,-15])translate([-(strength*2)/2,-9/2,0])cube([strength*2,10/2,height]);

    }
}

```


[User]
Hey, I need an OpenSCAD design for a bed leveling test print. I've got a pretty simple one I use now, but I want something a bit more flexible and configurable. I'd like it to have the following features:

First, I need to be able to specify the bed dimensions, so I need `xMax` and `yMax` parameters.  I'd also like to specify the height of the test print, with a `height` parameter.

For the actual test elements, I need:

1.  **Crosshairs:** A simple crosshair marking the center of the bed. It should be a cylinder with a smaller cylinder subtracted from the center, creating a ring.
2.  **Perimeter Lines:** I need lines around the edges of the bed. These should be simple rectangular prisms that sit flush on the print surface.
3.  **Diagonal Lines:** Similar to the perimeter lines, but these should run diagonally from corner to corner of the print area.
4.  **Fill Test Shapes:** I want a couple of filled shapes: a cylinder, and a cube.  I should be able to specify the radius of the cylinder and the size of the cube.  The cylinder should be in one corner (e.g., xMax/4 and yMax/2) and the cube in a different area (e.g., centered at xMax/2,yMax/4).
5.  **Text:** Finally, it would be nice to add some text to the print, perhaps "Level It". I'd need to be able to position this, and also control the height via the `height` parameter.

I'd like all elements to be in the correct places, so don't leave out any of the calculations to position the shapes and lines!

I'm using OpenSCAD, so please write a fully parametric SCAD file, which means using named parameters and modules. I'd also like it to be clear how to change these parameters when I open it up in OpenSCAD. If you could include some examples using `color()` to show how different parts look it'd be great too.

[Assistant]
Leveling_Test_Generator.scad:
```
//
//  Leveling Test Generator
//
//  EvilTeach 11/2015
//

// PrintBed Dimensions
xMax = 225;         // FlashForge Creator Dual
yMax = 145;

// Print Height
height = 0.5;

// Crosshairs are useful to see how close you are to the center of the plate
module zero_crosshairs()
{
    translate([xMax / 2.0, yMax / 2.0, 0])
        difference()
        {
            cylinder(r = 5.0, h = height);
            cylinder(r = 4.5, h = height);
        }
}

// Print lines to show any obvious leveling issues.
module plate_leveling_lines()
{
    // all around the outside
    translate([0, 0, 0])
        cube([xMax, height, height]);

    translate([0, yMax, 0])
       cube([xMax, height, height]);

    translate([0, 0, 0])
        cube([height, yMax, height]);

    translate([xMax, 0, 0])
        cube([height, yMax, height]);

    // This seems to cover up a defect in openscad.
    // I haven't investigated it seriously, so i is probably my bug
    translate([xMax, yMax, 0])
        cube([height, height, height]);

    // Calculate the angle to draw the diagonals
    a = xMax;
    b = yMax;
    c = sqrt(a * a + b * b);

    sinB = b / c;
    angleB = asin(sinB);

    translate([xMax, 0, 0])
        rotate(90 - angleB, 0, 0)
            cube([height, c , height]);

    translate([0, 0, 0])
        rotate(angleB - 90, 0, 0)
            cube([height, c, height]);

}

// Draw two small shapes with fill
module fill_some_shapes()
{
    translate([xMax / 4, yMax / 2, 0])
        cylinder(r = 5, h = height);

    cubeSize = 10;
    translate([xMax / 2 - cubeSize / 2, yMax / 4 - cubeSize / 2, 0])
        cube([cubeSize, cubeSize, height]);
}

// Toss a few letters into the mix
module some_text()
{
    translate([xMax * 0.30, yMax * 0.85, 0])
        linear_extrude(height = height)
        text("Level It");
}

module main()
{
    color("yellow") plate_leveling_lines();
    color("cyan")   zero_crosshairs();
    color("lime")   fill_some_shapes();
    color("red")    some_text();
}

main();

```


[User]
Hey, I'm trying to design a customizable connector for a geodesic dome, and I'd like to get some help writing the OpenSCAD code for it. I have a basic version, but I want to be able to easily change the number of struts that connect to it, and handle square or circular pegs, or maybe even other shapes eventually.

Here's what I'm thinking for the basic requirements:

**General Parameters:**

*   **`Strut_Shape`**:  A string variable, either "circular" or "square" initially. Might need to handle more later.
*   **`Strut_Count`**: An integer, defining the number of struts connecting to the hub. I’m imagining something between 3 and 6 for now.
*   **`Strut_Depth`**: A floating-point number specifying the depth of the peg/socket into the connector, in cm.
*   **`Wall_Thickness`**: A floating-point number, specifying the wall thickness around each socket, in cm.
*   **`Connector_Height`**: A floating point number, specifying the overall height of the connector at it's core, in cm. This will help determine the overall height of the connector.

**Circular Pegs:**

*   **`Circular_Diameter`**:  A floating-point number, the diameter of the circular peg in cm, used if `Strut_Shape` is "circular".

**Square Pegs:**

*   **`Square_Size`**: A floating-point number representing the side length of the square peg, in cm, used if `Strut_Shape` is "square".

The basic structure is this: it's a central "hub" with sockets radiating outwards to hold the struts. All of the struts' pegs/sockets should be identical and evenly spaced around the center. The sockets should be created by subtracting a shape from the main hub, where each subtracted shape should be as long as the Connector_Height plus the Strut_Depth.

I'd like the file to be well-commented, and I'd prefer to use the `BOSL2` library if that is possible as I like how it does transformations. I don't need a customizer or anything fancy, just a well-organized file that uses all of those parameters. Thanks in advance!

[Assistant]
IcosConnectorCustomizer_3.scad:
```
//Diameter of rod in centimeters
Rod_Diameter = 3;
//Depth of rod socket in centimeters
Rod_Depth = 5;
// Wall thickness around rod.
Wall_Thickness = 1;

module GenConnector()
{
	Rod_Radius = (Rod_Diameter/2)*1000;
	Rod_Depth =  Rod_Depth*1000;
	Wall_Thickness = Wall_Thickness*1000;

	Distance_From_Core = (Rod_Radius*2)+Wall_Thickness;
	Total_Rod = Distance_From_Core + Rod_Depth; // Full rod size is Rod_Depth+Distance_From_Core
scale(0.01,0.01,0.01){
	difference() {
		hull(){
			rotate([90,0,0]){
				for(i = [1 :5]){
					rotate([31.720,72.000*i,0]){
                        cylinder(r = (Rod_Radius+Wall_Thickness), h = Total_Rod ); // Outside Shape
					}
				}
			}
		}

		rotate([90,0,0]){
			for(i = [1 :5]){
				rotate([31.720,72.000*i,0]){
					difference() {
						cylinder(r = Rod_Radius, h = Total_Rod ); // Inside holes. h is distance from core, and Rod_Depth.
						cylinder(r = Rod_Radius, h = Distance_From_Core ); // Distance from core. Should be atleast  Diameter of rod //2990 (2540+500) 3040
					}
				}
			}
		}
	}
}
}

GenConnector();

```


[User]
Hey, I'm looking to get a design for a bouillon cube holder that's a bit more flexible and customizable than what I've seen out there. I'd like to be able to specify the dimensions of the cubes themselves, the number of cubes per 'stack', and the number of stacks next to each other.

Specifically, I'm picturing a series of vertical stacks of cubes, all held within a container with a few key features. It should have:

*   A main box-like container that holds all the cube stacks
*   Walls around the outside of the stacks, and also between each stack
*   A front opening that allows the cubes to be pulled out of the front.
*   An unloading opening at the back that allows the cubes to be loaded.

I need the following parameters to be configurable:

*   `cube_width`: The width of a single bouillon cube.
*   `cube_depth`: The depth of a single bouillon cube.
*  `cube_height`: The height of a single bouillon cube.
*  `cube_padding`: The amount of space around each cube within a stack.
*   `walls`: The thickness of the walls of the container and between the stacks.
*   `nbr_of_cubes_per_bloc`: The number of cubes in each vertical stack.
*   `nbr_blocks`: The number of side-by-side stacks/containers in the holder
*   `unloading_height`: The height of the opening for loading at the back.
*   `front_opening_width`: The width of the front opening.
*  `top_free`: The extra height above the top cube in a stack.

And, let's add a little cover to each stack - just a thin top piece on each of them, so cubes dont fall out. I’d like this cover to be removable.

I'm comfortable with using OpenSCAD. Can you generate the OpenSCAD file(s) for this? I don't think I'd need any external libraries for this one.

[Assistant]
cooking_cubes_holder_multi.scad:
```
cube_width=50;
cube_depth=32;
cube_height=17;
cube_padding=1;
walls=2;
nbr_of_cubes_per_bloc=10;
nbr_blocks=2;
unloading_height=20;
front_opening_width=8;

top_free=1*cube_height;
// modules
module make_cubes(width,depth,height,padding,nbr_of_cubes_per_bloc,top_free){
    cube([width+(2*padding),depth+(2*padding),height]);
    for(i = [1 : 1 : nbr_of_cubes_per_bloc-1]){
        translate([0,0,i*height-1]){
            cube([width+(2*padding),depth+(2*padding),height+1]);
            }
        }
    translate([0,0,nbr_of_cubes_per_bloc*+height]){
        cube([width+(2*padding),depth+(2*padding),height*nbr_of_cubes_per_bloc+top_free*2]);
        }
    }

// building

//cube([cube_width,cube_depth,cube_height]);

for(bloc = [1 : 1 : nbr_blocks]){
	translate([((walls+cube_width+cube_padding*2)*(bloc-1)),0,0]){

//------------------------------
   difference(){
       //container
       cube([cube_width+2*(walls+cube_padding),cube_depth+2*(walls+cube_padding),cube_height*nbr_of_cubes_per_bloc+walls+top_free]);
       //---------------------------------------------------------------
       // holes for screws
       translate([walls+cube_width/2,-1+walls/2,walls]){
           translate([0,0,cube_height]){
               rotate ([-90,0,0]) cylinder(h = walls+2.1, r1 = 1.5, r2 = 5, center = true);
               }
            translate([0,0,cube_height*(nbr_of_cubes_per_bloc-1)]){
               rotate ([-90,0,0]) cylinder(h = walls+2.1, r1 = 1.5, r2 = 5, center = true);
               }
           }
       // unloading opening
       translate([-walls,walls+cube_depth/2,walls]){
            cube([cube_width+3*(walls+cube_padding),cube_depth+2*(walls+cube_padding),unloading_height]);
            }
       //front view
       translate([walls+cube_width/2-(front_opening_width/2),walls+cube_depth,walls]){
            cube([front_opening_width,+cube_depth*2,cube_height*nbr_of_cubes_per_bloc+walls]);
            }
        //cubes space
        translate([walls,walls,walls]){
            make_cubes(cube_width,cube_depth,cube_height,cube_padding,nbr_of_cubes_per_bloc,top_free);
                }

       }
//------------------------------
// cover
	translate([0,cube_depth*2,0]){
		cube([cube_width+2*(walls+cube_padding),cube_depth+2*(walls+cube_padding),walls]);
		translate([walls+cube_padding,walls+cube_padding,walls]){
			cube([cube_width,cube_depth,walls]);
			}
		}
	}
}

```


[User]
I'm looking to create a parametric, customizable shelf that attaches to a window using suction cups. I have a basic design in mind but need help implementing it in OpenSCAD.

The key parameters I want to be able to control are:

*   **`shelf_height`**: The vertical distance from the center of the suction cup "axle" to the top surface of the shelf.
*   **`shelf_width`**: The width of the shelf.
*  **`shelf_length`**: The length (depth) of the shelf.
*   **`axle_diameter`**: The diameter of the cylindrical "axle" that the suction cup attaches to.
*   **`axle_width`**: The thickness of the axle.
*   **`thickness`**: The thickness of the shelf itself.
*   **`number_x`**: How many shelves to place horizontally (X axis).
*   **`number_y`**: How many shelves to place vertically (Y axis).
*    **`distance_to_window`**: The offset from the edge of the shelf to the axle/suction cup.
*   **`tolerance`**: A small value for the suction cup notch to have a bit of clearance.
*   **`cup_size`**: The size/length of the support structure that extends below the shelf. This should be at least as large as the radius of the suction cup itself.

The shelf should have a flat, rectangular platform with a support extending down from the platform to the axle. The axle is a small cylinder with a notch removed for the suction cup. I'd also like a supporting "leg" that extends down from the shelf, parallel with the window. The support structure should prevent the shelf from rotating.

I'm hoping the generated OpenSCAD files are fully parametric so I can adjust these values to suit different suction cups and objects. I would prefer that you don't use any libraries, unless it greatly simplifies things.

[Assistant]
shelf_v3.scad:
```

shelf_height=17.5;		//Height from center of "axle" Default 17.5
shelf_width=45;			// Default 45
shelf_length=45;		// Default 45
axle_diameter=6;		//Default 6
axle_width=1.7;			// Default 1.7
thickness=2;			// Default 2
//
number_x=1;		//////
number_y=1;		//////
//
distance_to_window=2;			// Default 2

tolerance=0.7;			// Default 0.7
cup_size=35;			//

$fn=50;

module shelf()
{
// Shelf

translate([-shelf_width/2,0,shelf_height])
cube([shelf_width, shelf_length, thickness]);

difference()
{
hull()
{

// Suction Cup Connection

translate([0,distance_to_window + axle_width/2,0])
rotate([90,0,0])
cylinder(r=axle_diameter*2, h=axle_width, center=true);

// Legs

translate([-shelf_width/2, distance_to_window,shelf_height])
cube([shelf_width, axle_width, thickness]);

}

// Notch

translate([0,(distance_to_window + axle_width/2 ),0])
rotate([90,0,0])
cylinder(r=(axle_diameter + tolerance)/2, h=axle_width+2, center=true);

translate([-(axle_diameter+tolerance)/2, distance_to_window-1, -axle_diameter*2])
cube([axle_diameter + tolerance, axle_width+2, axle_diameter*2]);
}

// support

difference()
{

// FIX THIS FOR LARGER SHELF HEIGHT
translate([-axle_width/2,distance_to_window+axle_width,axle_diameter/2+tolerance/2])
cube([axle_width,cup_size/2+axle_diameter/2-thickness,shelf_height-(axle_diameter/2)]);

translate([0,shelf_height + distance_to_window + axle_width,tolerance/2])
rotate([0,90,0])
cylinder(r=shelf_height,h=axle_width+2, center=true);
}

}

//--------------------------------------------------------

for (i=[0:number_x-1], j=[0:number_y-1])
{

translate([i*(shelf_width+5), j*(shelf_length+5),shelf_height + thickness])
rotate([0,180,0])
shelf();

}

```


[User]
Hey, I'm looking for an OpenSCAD design for a calibration tool for my 3D printer, specifically for extruder calibration. I've got an existing design I like, and I'd like to see if you can generate something similar, but a bit more flexible and easy to adjust.

Here's what I'm after:

**Core Functionality:**

The main part of the design is a rectangular block with a hole in the center for the filament to pass through. This block needs to have dimensions that are adjustable, so it can fit different filament diameters. The block should also have a series of small marks/notches along the side, spaced every 5mm vertically, kind of like a ruler along the side. These are to help measure the amount of filament that's extruded during testing.

**Key Parameters (That I need to be adjustable in the OpenSCAD design):**

*   **`FilamentDiameter`:**  The diameter of the filament being used. I use 1.75mm and 3mm usually, but it should be easily set.
*   **`ToolSize`:** The overall length of the block along the direction of the filament.
*   **`ShowFilament`:** A boolean (0 or 1) to toggle whether to show a cylinder of the specified filament diameter passing through the block as a visual guide.
*   **`InnerHole`:**  A boolean (0 or 1) to toggle between a cube or cylinder hole in the center of the block, letting the filament through.
*    **`ThicknessAdjustX`:** Amount to adjust the width of the block on its narrow direction.
*   **`ThicknessAdjustY`:** Amount to adjust the width of the block in its wider direction.
*   **`$fn`:** For the cylinder, this is the usual OpenSCAD `$fn` variable, which should default to 25.

**Specific Design Details:**

*   The block should have the hole centered both horizontally (X and Y) within the block.
*   The marks along the side should alternate sides on each 5mm increment along the Z axis of the tool. They should be small, like thin cubes sticking out.
*    There should be a rectangular cutout on one side, going almost the entire length of the block, to allow the user to see the filament inside.
*   The mark cubes should not start at the very bottom of the block, and likewise, shouldn't go all the way to the top.

**Additional Requests:**
*   Please include a comment for each major section of the code describing the intent of that code.
* I would prefer that the design uses `linear_extrude` to generate the main block, instead of `cube`.
* Please use the `BOSL2` library for any helper functions you might need for the design.
*  I would also like a small, built-in example to show how to use the calibration tool, perhaps some short helper text visible when the tool is rendered and a short explanation in a comment.

I think that covers everything, let me know if you have questions.

[Assistant]
ExtruderCalibrationHelper.scad:
```
FilamentDiameter = 1.8;
// Total size will be ToolSize+2
ToolSize = 50;
ShowFilament = 0; // [0:No, 1:Yes]
InnerHole = 1; // [0:Cube, 1:Cylinder]
ThicknessAdjustX = 2.5;
// Keep little bigger than X one
ThicknessAdjustY = 4;

/* [HIDDEN] */
$fn = 25;
FilamentRadius = FilamentDiameter/2;
toolX = FilamentDiameter+ThicknessAdjustX;
toolY = FilamentDiameter+ThicknessAdjustY;
baseToolSize = ToolSize +2;

// Rotate to better preview in Thingiverse
rotate([0,0,-90])
    tool();
if(1==ShowFilament){
    cylinder(h=baseToolSize*1.2,r=FilamentRadius,center=true);
}

module tool(){
    addRadius = 0.5;
    difference(){
        cube([toolX,toolY,baseToolSize],center=true);

        translate([0,0,-baseToolSize*0.25])
        if(0==InnerHole)
            cube([2*(FilamentRadius+addRadius),
                  2*(FilamentRadius+addRadius),
                  baseToolSize*2],center=true);
        else
            cylinder(r=FilamentRadius+addRadius,h=baseToolSize*2,center=true);

        translate([toolX/2,0,0])
            cube([toolX/2,FilamentDiameter*0.9,baseToolSize-6],center=true);
    }
    fc = FilamentDiameter < 2.25 ? 1.5 : 1.25;
    markSize = ThicknessAdjustY/2;
    for(i = [0:1:(baseToolSize/5)-1]){
        z = 3-(baseToolSize/2) + 5 * i;
        if(z < (baseToolSize/2)-3){ // Precaution IF
            translate([toolX/2,-(markSize/2)+((i%2==0 ? 1 : -1)*(FilamentRadius+markSize/2)),z])
                cube([0.5,markSize,1]);
        }
    }
}
```