Path Transitions

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Path Transitions

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Last edited Sep 9, 2012

Created on Apr 12, 2012

A real-time scrolling line chart demonstrates a surprising visual artifact when animating the path. The chart displays a sliding window of 40 random data points, with new values entering from the right and old ones exiting left. The example uses D3's `transition` API and SVG path interpolation to animate the line. It reveals that default path interpolation parses the `d` attribute's numbers and pairs them in order, causing vertical "wiggling" as control points move in place. The solution involves interpolating the chart's transform instead of the path data.

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