{"version":"1.0","type":"rich","title":"pie chart transition example","description":"This example shows a single, animated pie chart where the foreground arc transitions to a new random angle every 1.5 seconds, with the background arc remaining fixed at 100%. Built with D3 v5, it renders two SVG path arcs using a custom `d3.arc` generator with bound inner and outer radii. The animation is driven by `d3.interval` and `transition.attrTween`, which interpolates the `endAngle` value in data space before computing the new path string, ensuring smooth angular transitions.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/aea725b7ba234a208768568bf2732bf9?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}