nice gear

slides/icons.typ

@@ -90,40 +90,88 @@
   //x0: 0pt, y0: 0pt,
   out-rad: 100pt,
   in-rad: none,
+  center-rad: none,
   nb-teeth: 6,
   teeth-angle: none,
   stroke: black + 3pt,
   fill: luma(70%),
-  fill-center: white,
 ) = {
   let x0 = out-rad
   let y0 = out-rad
   let teeth-angle = if teeth-angle == none { 360deg / nb-teeth / 2 } else { teeth-angle }
+  let inter-teeth-angle = (360deg / nb-teeth) - teeth-angle
   let in-rad = if in-rad == none { out-rad * 0.75 } else { in-rad }
+  let center-rad = if center-rad == none { in-rad / 2 } else { center-rad }
   box(width: 2*out-rad, height: 2*out-rad, {
     //place(left+bottom, line(start: (0%, -50%), end: (100%, -50%)))
     //place(left+bottom, line(start: (50%, 0%), end: (50%, -100%)))
-    polygon(
+    curve(
       stroke: stroke,
       fill: fill,
+      fill-rule: "even-odd",
       ..for i in range(nb-teeth) {
         let angle = i * 360deg / nb-teeth
         let center_off = calc.sin(teeth-angle/2) * in-rad
         let (x0_1, y0_1) = polar(x0: x0, y0: y0, r: center_off, th: angle - 90deg)
         let (x0_2, y0_2) = polar(x0: x0, y0: y0, r: center_off, th: angle + 90deg)
-        (
-         (polar(x0: x0, y0: y0, r: in-rad, th: angle - teeth-angle/2)),
-         //(polar(x0: x0, y0: y0, r: out-rad, th: angle - teeth-angle/2)),
-         (polar(x0: x0_1, y0: y0_1, r: out-rad, th: angle)),
-         (polar(x0: x0_2, y0: y0_2, r: out-rad, th: angle)),
-         //(polar(x0: x0, y0: y0, r: out-rad, th: angle + teeth-angle/2)),
-         (polar(x0: x0, y0: y0, r: in-rad, th: angle + teeth-angle/2)),
 
+        let p0 = polar(x0: x0_1, y0: y0_1, r: out-rad, th: angle)
+        let p1 = polar(x0: x0_2, y0: y0_2, r: out-rad, th: angle)
+        let p2 = polar(x0: x0, y0: y0, r: in-rad, th: angle + inter-teeth-angle/2)
+        let p3 = polar(x0: x0, y0: y0, r: in-rad, th: angle + 3*inter-teeth-angle/2)
+
+        let u2 = polar(x0: 0pt, y0: 0pt, r: 1pt, th: angle + inter-teeth-angle/2 + 90deg)
+        let u3 = polar(x0: 0pt, y0: 0pt, r: 1pt, th: angle + 3*inter-teeth-angle/2 + 90deg)
+        let l2 = 4 * in-rad / 3 * calc.tan(inter-teeth-angle / 4) / 1pt
+        let l3 = -l2
+        //let l2 = 1
+        let q2 = (p2.at(0) + l2 * u2.at(0), p2.at(1) + l2 * u2.at(1))
+        let q3 = (p3.at(0) + l3 * u3.at(0), p3.at(1) + l3 * u3.at(1))
+
+        let result = (
+         curve.line(p0),
+         curve.line(p1),
+         curve.line(p2),
+
+         /*
+         curve.line(q2),
+         curve.line(p2),
+         curve.line(p3),
+         curve.line(q3),
+         curve.line(p3),
+         */
+
+
+         curve.cubic(q2, q3, p3)
         )
-      }
+        if i == 0 { 
+          result.insert(0, curve.move(p0))
+        }
+        result
+
+      },
+      curve.close(mode: "straight"),
+      ..for i in range(4) {
+        let angle = i * 360deg / 4
+        let p0 = polar(x0: x0, y0: y0, r: center-rad, th: angle)
+        let u0 = polar(x0: 0pt, y0: 0pt, r: 1pt, th: angle + 90deg)
+        let p1 = polar(x0: x0, y0: y0, r: center-rad, th: angle+90deg)
+        let u1 = polar(x0: 0pt, y0: 0pt, r: 1pt, th: angle + 180deg)
+        let l0 = 4 * center-rad / 3 * calc.tan(90deg / 4) / 1pt
+        let l1 = -l0
+        let q0 = (p0.at(0) + l0 * u0.at(0), p0.at(1) + l0 * u0.at(1))
+        let q1 = (p1.at(0) + l1 * u1.at(0), p1.at(1) + l1 * u1.at(1))
+        let result = (
+          curve.cubic(q0, q1, p1),
+        )
+        if i == 0 {
+          result.insert(0, curve.move(p0))
+        }
+        result
+      },
+      curve.close()
     )
-    let center-rad = in-rad * 2/3
-    place(left+bottom,
+    /*place(left+bottom,
       // wtf?
       dx: out-rad - center-rad,
       dy: -out-rad + center-rad,
@@ -132,7 +180,7 @@
         stroke: stroke,
         fill: fill-center,
       )
-    )
+    )*/
   })
 }
 
@@ -227,9 +275,9 @@
 
 }
 
+#gear()
 /*
 #phone(body: [Hello World!])
-#move(dx: 100pt, dy: 100pt, gear())
 #wrench()
 
 #apk()