Fork of Testing D3 force layout
A force-directed graph visualizes relationships among a set of nodes, representing a network of photographers and their associated photo IDs. Each node displays an icon and a textual label, while connecting lines illustrate links between them. The layout uses a physical simulation to position nodes based on repulsive and attractive forces, defined by parameters like gravity, distance, and charge. The visualization is rendered as SVG and built with d3.v3, leveraging the `d3.layout.force()` API for the simulation and SVG elements for drawing nodes and links. The graph data is loaded from a JSON file.