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Problems with skArc

sören_svenssonsören_svensson Member Posts: 21 ✭✭

I'm creating some corners with skArc but some are ending up inside-out!

I'm using the getArcMidPoint function posted here earlier.

All the small arcs in the picture below should be "outies" and the large center one "innie".

Here's the code for the lower left one (ll and ur are vectors)

start = ll + vector(0 * millimeter, radius);
        end = ll + vector(radius, 0 * millimeter);
        mid = getArcMidpoint(ll + vector(radius, radius), start, end);
        skArc(sketch1, "arc2", {
                "start" : start,
                "mid" : mid,
                "end" : end

and the top right

start = ur + vector(-radius, 0 * millimeter);
        end = ur + vector(0 * millimeter, -radius);
        mid = getArcMidpoint(ur + vector(-radius, -radius), start, end);
        skArc(sketch1, "arc8", {
                "start" : start,
                "mid" : mid,
                "end" : end

Anyone have any idea why and how to control it:




  • ilya_baranilya_baran Onshape Employees, Developers, HDM Posts: 1,170
    Try switching the start and end arguments to the getArcMidpoint function -- I think that function (Neil wrote it) gets the midpoint assuming the arc is counterclockwise from start to end.
    Ilya Baran \ VP, Architecture and FeatureScript \ Onshape Inc
  • sören_svenssonsören_svensson Member Posts: 21 ✭✭
    Thanks, worked perfectly!
    I should have thought about that  :#

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