Path Tween

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✓ Published0🌍 Public

Last edited Aug 4, 2017

Created on Oct 19, 2012

This example demonstrates smooth path interpolation between two SVG shapes defined by cubic Bézier curves. A black path morphs between two distinct configurations over a two-second animated loop, using SVG’s getPointAtLength and getTotalLength methods to uniformly sample points at four-pixel intervals. The transition replaces the original curve with a polyline for interpolation via d3.interpolate, then restores the Bézier path upon completion. The animation runs in d3 v4 with transition.attrTween, alternating between the two path definitions indefinitely.

AI-generated description

This example demonstrates path interpolation using SVG's getPointAtLength feature. The source path and the target path are sampled uniformly using a configurable precision in pixels (here, 4px). During the transition, the path is replaced with a piecewise linear curve, or polyline, for easier interpolation. When the transition finishes, the path is restored to the original cubic Bézier. This technique is handy because it works for any path expressible with SVG's path data mini-language.

See also the circular shape tweening example.

gpl-3.0 Licensed

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