{"version":"1.0","type":"rich","title":"Untitled","description":"This example shows a force-directed layout of 200 colored circles that repel each other and collide as they move. Dragging the mouse moves a fixed root node, pulling the surrounding circles toward the cursor. The visualization uses D3 v3’s `d3.layout.force` with custom gravity and charge functions, and a quadtree via `d3.geom.quadtree` to efficiently handle collision detection between circles. Each circle’s radius is randomly assigned, and its fill color comes from a categorical scale (`d3.scale.category10`). The rendering is done in SVG, with positions updated on each tick event.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/73569de20a9f4aab80444fc1d816114c?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}