Update KCL docs (#586)

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content/pages/docs/kcl-samples/helical-gear/main.kcl

@@ -42,15 +42,15 @@ fn helicalGear(nTeeth, module, pressureAngle, helixAngle, gearHeight) {
     helicalGearSketch = startSketchOn(offsetPlane(XY, offset = offsetHeight))
       |> startProfile(at = polar(angle = helixCalc, length = baseDiameter / 2))
       |> involuteCircular(
-           startRadius = baseDiameter / 2,
-           endRadius = tipDiameter / 2,
+           startDiameter = baseDiameter,
+           endDiameter = tipDiameter,
            angle = helixCalc,
            tag = $seg01,
          )
       |> line(endAbsolute = polar(angle = 160 / nTeeth + helixCalc, length = tipDiameter / 2))
       |> involuteCircular(
-           startRadius = baseDiameter / 2,
-           endRadius = tipDiameter / 2,
+           startDiameter = baseDiameter,
+           endDiameter = tipDiameter,
            angle = -(4 * atan(segEndY(seg01) / segEndX(seg01)) - (3 * helixCalc)),
            reverse = true,
          )

content/pages/docs/kcl-std/functions/std-sketch-involuteCircular.md

@@ -10,9 +10,11 @@ Extend the current sketch with a new involute circular curve.
 ```kcl
 involuteCircular(
   @sketch: Sketch,
-  startRadius: number(Length),
-  endRadius: number(Length),
   angle: number(Angle),
+  startRadius?: number(Length),
+  endRadius?: number(Length),
+  startDiameter?: number(Length),
+  endDiameter?: number(Length),
   reverse?: bool,
   tag?: TagDecl,
 ): Sketch
@@ -25,9 +27,11 @@ involuteCircular(
 | Name | Type | Description | Required |
 |----------|------|-------------|----------|
 | `sketch` | [`Sketch`](/docs/kcl-std/types/std-types-Sketch) | Which sketch should this path be added to? | Yes |
-| `startRadius` | [`number(Length)`](/docs/kcl-std/types/std-types-number) | The involute is described between two circles, start_radius is the radius of the inner circle. | Yes |
-| `endRadius` | [`number(Length)`](/docs/kcl-std/types/std-types-number) | The involute is described between two circles, end_radius is the radius of the outer circle. | Yes |
 | `angle` | [`number(Angle)`](/docs/kcl-std/types/std-types-number) | The angle to rotate the involute by. A value of zero will produce a curve with a tangent along the x-axis at the start point of the curve. | Yes |
+| `startRadius` | [`number(Length)`](/docs/kcl-std/types/std-types-number) | The involute is described between two circles, startRadius is the radius of the inner circle. Either `startRadius` or `startDiameter` must be given (but not both). | No |
+| `endRadius` | [`number(Length)`](/docs/kcl-std/types/std-types-number) | The involute is described between two circles, endRadius is the radius of the outer circle. Either `endRadius` or `endDiameter` must be given (but not both). | No |
+| `startDiameter` | [`number(Length)`](/docs/kcl-std/types/std-types-number) | The involute is described between two circles, startDiameter describes the inner circle. Either `startRadius` or `startDiameter` must be given (but not both). | No |
+| `endDiameter` | [`number(Length)`](/docs/kcl-std/types/std-types-number) | The involute is described between two circles, endDiameter describes the outer circle. Either `endRadius` or `endDiameter` must be given (but not both). | No |
 | `reverse` | [`bool`](/docs/kcl-std/types/std-types-bool) | If reverse is true, the segment will start from the end of the involute, otherwise it will start from that start. | No |
 | `tag` | [`TagDecl`](/docs/kcl-std/types/std-types-TagDecl) | Create a new tag which refers to this line. | No |