Quantitative foci �� <a href="http://bl.ocks.org/3116650" title="view this gist via bl.ocks.org">?</a> <a href="http://bl.ocks.org/GerHobbelt" title="view a list of all my gists at bl.ocks.org">8</a>

Force Layouts - Quantitative Foci

This example demonstrates a force-directed layout with radial foci, where mouse movement generates nodes that are attracted to invisible rings around the center. Node color encodes the ring’s squared radius using a linear color scale. The code uses d3.layout.force, svg selection of circles, and d3.svg.mouse to add nodes, while the tick handler steers each node toward its assigned ring distance. A transition shrinks nodes after three seconds and removes them from the array, creating a continuous particle stream. The work is derived from an earlier quantitative-foci example by Mike Bostock.

GGerHobbelt

90% match

Multi-Foci Force Layout

Five fixed nodes serve as force foci that attract and repel moving nodes in a 2D space. As the mouse moves, the user spawns new nodes with random radii and colors; these nodes are pulled toward a focus matching their type while colliding with each other via a quadtree. The simulation runs on D3 v3’s force layout with custom attraction and collision logic, rendering everything as SVG circles with animated transitions that remove nodes after three seconds. The `d3.layout.force` API drives the physics, and `d3.geom.quadtree` accelerates collision detection.

84% match

Force-Directed Layout (Multiple Foci)

One hundred unconnected nodes in a D3 force-directed graph continuously move and cluster around four focal points. The layout uses custom forces that push even and odd indexed nodes in opposite vertical and horizontal directions, creating a structured pattern of four color-coded groups. Rendered as an animated SVG, the visualization relies on D3’s `d3.layout.force` with position Verlet integration, and a tick handler applies index-based directional pushes each frame. Clicking the page or dragging nodes perturbs their positions, which then resume the clustering behavior.

KKuerzibe

84% match

Multi-Foci Force Layout

A multi-foci force layout arranges 200 nodes into 10 distinct color-coded clusters, each pulled toward its own focal point along the horizontal axis. The visualization uses a custom gravity function to move nodes toward cluster centers and a collision detection routine built on a quadtree to prevent overlapping circles. Rendered as SVG with D3 v3, the code employs `d3.layout.force`, `d3.scale.ordinal` for focal positions, and `d3.geom.quadtree` for efficient proximity checks, with node radii derived from a logarithmic distribution.

83% match

Multi-Foci Force Layout

A multi-foci force layout clusters 100 circles into four groups using D3’s d3.layout.force with position Verlet integration. Custom forces push nodes up, down, and sideways based on their index, while d3.event and force.drag enable mouse interaction. Clicking the page perturbs node positions with random offsets, and the simulation resumes. SVG circles render with a categorical color scale and animate smoothly via the tick event.

Multi-Foci Force Layout

A stream of circles enters the scene at regular intervals, each assigned one of three focal points. The circles gravitate toward their assigned focus, creating three distinct clusters that shift as new nodes are added and older ones settle. Using D3 v3’s `d3.layout.force`, the example overrides the default tick handler to manually steer each node toward its focus, with the simulation’s alpha value controlling the easing. The SVG circles are colored via a categorical scale based on their focal point ID, and the animation runs indefinitely via `setInterval`.

Force-Directed Layout

This example shows a force-directed network graph where nodes appear incrementally, followed by their connecting links chaining into view one by one. Built with the D3 v2 `d3.layout.force`, it renders SVG circles and lines using data from the "miserables.json" character co-occurrence dataset. Each node fades in via `transition().delay()` and `attr("opacity")`; once visible, its links are queued and faded in sequentially through chained transitions triggered by the tick event.

GGerHobbelt

Force Layout

This example demonstrates an interactive force-directed graph built with React and D3 v6. A hierarchical dataset is flattened into nodes and links, then rendered as circles and lines using SVG. The simulation uses `d3.forceSimulation` with center, charge, collide, and link forces. Moving the mouse dynamically adds `forceX` and `forceY` forces that pull nodes toward the pointer, with strength varying by node depth. Clicking applies a `forceRadial` orbit force around the clicked point and draws a green circle to indicate the orbit radius.

MMinwoo Pak