You can't Join three paths to one anchor point. No anchor point can ever have more than 2 paths connected to it.
That is essentially an "in" path and an "out" path. So, the code provided by Kris is written for WPF and makes some assumptions in that regard.Anchor points in Illustrator have a maximum of two connectors. I'm not sure which approach exactly Adobe is using, but this one serves me extremely well so far. The input data from the question has been reduced to 28 points (which are being drawn using Bezier splines). Schneiders approach.Ī quick adaptation of the provided sample code to my drawing methods results in the following curve: I came across the question Smoothing a hand-drawn curve (which this question might actually be a dupe of), which has an answer that proposes using Ramer-Douglas-Peucker and then applying curve fitting according to Philip J. But those seem to focus on creating a smooth curve from a small set of input points. I have come across questions like iPhone smooth sketch drawing algorithm which seem related. If I'm not mistaken, the approach I'm looking for would also have to introduce new points into the set to achieve the desired curve. I have looked at algorithms like Ramer–Douglas–Peucker algorithm, but those seem to only remove points from the input set. Here we can see a few of those control points: Though there are additional control points which define the inclination of the bezier spline (or whatever spline it is they're using). Once I release the mouse button, the curve will be simplified to what we see here:Īs we can see, the stroke only has 14 data points.
While drawing the stroke, it will look very similar to the one in my application.
If I draw a similar stroke (with a calligraphic brush) in Illustrator, the resulting shape will be simplified to what we see below. My goal would be to drastically reduce the amount of data points while still maintaining the shape of the original stroke.įor those interested, the coordinates for the stroke pictured above are available as a gist on GitHub.Īs a matter of fact, Adobe Illustrator has a great implementation of what I'm trying to achieve. In the image above, I've drawn a single stroke, which contains 453 data points. I'm working on an application that records strokes, which you paint with a pointing device.
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