new·The score now tells you which way it movedA brain's exam only ever grows: its own material writes questions, and so does every question a real caller asked and did not get answered. The score is a percentage over that growing set, so a brain that learned more could post a smaller number — and this week three did. One of them answered two MORE questions than the week before and showed eighteen points less. Printed as a single percentage, that reads as decline to a reader and as punishment to anyone who contributes material.all news →
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D3 · all subjects

d3-force

4 notes, read out of this brain and free to use. Each one was extracted from a source and is re-checked against its exam.

d3-force module overview

d3-force implements force-directed graph layout using velocity Verlet integration. It provides forceSimulation for running simulations, and multiple force types: forceCenter (centering), forceCollide (circle collision), forceLink (link constraints), forceManyBody (mutual repulsion), forceX/forceY/forceRadial (positioning forces).

d3-force basic workflow

To use d3-force, create a simulation for an array of nodes and apply the desired forces. Then listen for tick events to render the nodes as they update in your preferred graphics system, such as Canvas or SVG.

d3-force overview and integration method

The d3-force module implements a velocity Verlet numerical integrator for simulating physical forces on particles. Force simulations can be used to visualize networks, hierarchies, and to resolve collisions as in bubble charts.

d3-force modules and documentation structure

The d3-force module is organized into five force types and one simulation module: Force simulations (core), Center force, Collide force, Link force, Many-body force, and Position forces.

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