OpenJSCAD.com code for a dial

dial.jscad

//makes a dial for export as a DXF or SVG
//needs finishing

let resolution = 64
let slotfudge = 0.05
let slotlength = 2
function cutarc(r, a, i) {
    let arcwidth = .1// a/2
    let curvedpath = CSG.Path2D.arc({
        center: [0,0,0],
        radius: r,
        startangle: a * i - arcwidth + slotfudge,
        endangle: a * i + arcwidth,
        resolution: resolution,
    });
    let curvedpathin = CSG.Path2D.arc({
        center: [0,0,0],
        radius: r-slotlength,
        endangle: a * i - arcwidth,
        startangle: a * i + arcwidth - slotfudge,
        resolution: resolution,
    });
    let curvedpath2 = curvedpath.concat(curvedpathin)
    let curvedpathclosed = curvedpath2.close()
    return curvedpathclosed.innerToCAG()
}
function cutarcs(degreerange, positions, r) {
    let a = degreerange/positions //angle length of each arc
    console.log(positions+" slots of "+a+" degrees")
    curves = []
    for (let i = 0; i<positions+1; i+=2){
        curves.push(cutarc(r,a,i))
        
    }
    return curves
}
function dial(degreesrange, positions,  r) {
    let curves = cutarcs(degreesrange, positions, r)
    let radwidth = .1
    let dialbottom1 = CSG.Path2D.arc({
        center: [0,0,0],
        radius: r-slotlength,
        startangle: 0-radwidth+slotfudge,
        endangle: degreesrange+radwidth,
        resolution: resolution,
    });
    let dialbottom2 = CSG.Path2D.arc({
        center: [0,0,0],
        radius: r-slotlength-radwidth,
        startangle: degreesrange - radwidth,
        endangle: 0 + radwidth - slotfudge,
        resolution: resolution,
    });
    let dialbottom = dialbottom1.concat(dialbottom2).close().innerToCAG()
    curves.push(dialbottom)
    let dialtop1 = CSG.Path2D.arc({
        center: [0,0,0],
        radius: r,//slotfudge,
        startangle: 0-radwidth+slotfudge,
        endangle: degreesrange+radwidth,
        resolution: resolution,
    });
    let dialtop2 = CSG.Path2D.arc({
        center: [0,0,0],
        radius: r-radwidth,
        startangle: degreesrange - radwidth,
        endangle: 0 + radwidth - slotfudge,
        resolution: resolution,
    });
    let dialtop = dialtop1.concat(dialtop2).close().innerToCAG()
    curves.push(dialtop)
    return curves

}
    

function main () {

  return dial(170, 40, 10)
  //return cutarcs(170, 40, 10)
}