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Point-Along-Path Interpolation

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Aantonyross
Last edited Apr 19, 2016
Created on Apr 19, 2016

Two square Catmull–Rom spline paths are drawn in black, and clicking the SVG spawns colored circles that animate along the paths. Each circle moves along one path for the first 30% of its journey, then switches to the other path for the remainder, while a text label displays the animation progress. The example uses D3 v3 with SVG transitions and `transition.attrTween` to interpolate positions via the native `getTotalLength` and `getPointAtLength` methods on path elements.

AI-generated description

This example demonstrates how to use the getTotalLength and getPointAtLength methods on SVG path elements to interpolate a point along a Catmull–Rom spline.

A related technique is stroke dash interpolation.

forked from <a href='http://bl.ocks.org/mbostock/'>mbostock</a>'s block: <a href='http://bl.ocks.org/mbostock/1705868'>Point-Along-Path Interpolation</a>

forked from <a href='http://bl.ocks.org/antonyross/'>antonyross</a>'s block: <a href='http://bl.ocks.org/antonyross/da1e1bdb53cd9df07b0d7848835f2b9f'>Point-Along-Path Interpolation</a>

forked from <a href='http://bl.ocks.org/antonyross/'>antonyross</a>'s block: <a href='http://bl.ocks.org/antonyross/79c75e46b93860f74a7c29f3a190a8ca'>Point-Along-Path Interpolation</a>

forked from <a href='http://bl.ocks.org/antonyross/'>antonyross</a>'s block: <a href='http://bl.ocks.org/antonyross/fbc32c4d940260be137180b55ae6f428'>Point-Along-Path Interpolation</a>

forked from <a href='http://bl.ocks.org/antonyross/'>antonyross</a>'s block: <a href='http://bl.ocks.org/antonyross/77dff069d00125150b9dc73935e45c8c'>Point-Along-Path Interpolation</a>

gpl-3.0 Licensed

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