{"version":"1.0","type":"rich","title":"Alpha-Shapes","description":"This example visualizes the alpha-shape boundary of a set of 2D points, highlighting the concave hull that encloses the data. It uses D3.js to compute a Delaunay triangulation via `d3.geom.delaunay`, filters triangles whose edges exceed a squared alpha threshold, and then traces the outer edges with a custom `boundary` function. The points are offset horizontally, and the resulting polygon is rendered in yellow SVG paths over a blue background, while the raw vertices remain hidden. The code relies on D3 v5 and an older D3 geometry module for triangulation.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/a81b32291e0344bda7ecc3f90a720851?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}