Point-Along-Path Interpolation

Point-Along-Path Interpolation

Two closed Catmull–Rom splines are drawn as black outlines. Clicking anywhere on the SVG adds a colored circle that then animates along one of the two paths, using the SVG path methods `getTotalLength` and `getPointAtLength` to interpolate its position. A running counter in the top right displays the animation progress as a percentage, and each new click adds another circle with a randomly assigned color, creating multiple points moving simultaneously along the paths.

94% match

Point-Along-Path Interpolation

Two closed Catmull–Rom splines are drawn as black paths on an SVG canvas, with four user-defined control points each. Clicking anywhere on the canvas adds a new runner—a blue circle—that continuously follows the nearest path using the SVG `getTotalLength` and `getPointAtLength` methods to interpolate its position along the curve. The runners’ motion is driven by a simple steering behavior simulation (velocity, acceleration, and force vectors), and each new runner is added to the dataset and rendered as a circle on click. The animation illustrates how points can be smoothly animated along arbitrary SVG paths, with the paths and circles updated dynamically in response to user interaction.

94% match

Point-Along-Path Interpolation

Two closed Catmull–Rom spline paths appear as black outlines on a white SVG canvas. Clicking anywhere on the canvas spawns a colored circle that animates along the path, moving at a constant speed. This is achieved by leveraging the SVG path methods `getTotalLength()` and `getPointAtLength()` to compute the circle’s position at each animation frame. The motion loops continuously, with each circle retaining its own velocity, acceleration, and top-speed properties, producing an organic, independent movement around the spline.

Point-Along-Path Interpolation

Two closed Catmull–Rom splines form two nested loops, and clicking anywhere on the SVG adds a circle that animates along the outer path. The example demonstrates SVG’s `getTotalLength` and `getPointAtLength` methods to compute positions along the path, driving each circle’s transform via a `transition.attrTween` that loops indefinitely. The code uses D3 v3, with `d3.svg.line` and a cardinal-closed interpolation to define the splines, and renders the animation as SVG circles and paths.

Point-Along-Path Interpolation

Two closed Catmull–Rom splines are drawn with D3’s SVG line generator, and clicking anywhere on the page appends a red circle that begins a looping 10-second transition along one of the paths. The animation relies on the native SVG path methods `getTotalLength` and `getPointAtLength`, which the `transition.attrTween` uses to compute the circle’s position at each time step. The example demonstrates point-along-path interpolation with d3.v3, rendering both the static paths and animated circles in SVG.

Point-Along-Path Interpolation

An animated visualization demonstrates how points travel along closed Catmull-Rom spline paths. Multiple circles, created by clicking, move continuously along the paths using SVG’s `getTotalLength` and `getPointAtLength` methods to calculate positions along the path. The code uses d3.v3 with `transition.attrTween` for smooth animation, and vector-based physics to update each circle's velocity and acceleration. The example includes two sample paths and shows how custom Runner objects can be spawned interactively by clicking on the SVG canvas.

Point-Along-Path Interpolation

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.

92% match

Point-Along-Path Interpolation

Two nested, closed Catmull–Rom splines define the paths in this SVG animation. Clicking anywhere adds a colored circle that first collapses to the inner path’s start, then follows the outer path via a tween that switches between the two paths partway through the animation. The code uses D3 v3’s `transition.attrTween` with the native SVG `getTotalLength` and `getPointAtLength` methods to interpolate each circle’s position, while a text element displays the tween progress as a percentage.