This example demonstrates a synchronized 3D globe using d3 and Three.js, controlled by a single drag gesture on a 2D orthographic projection. It shows how versor (quaternion) math maps mouse movement to a sphere’s rotation, updating both the d3 geographic paths and the Three.js mesh sphere in real time. The code uses `d3.geoOrthographic`, `d3.geoPath`, and the custom `versor.js` library for quaternion calculations. It renders land polygons from world-atlas data on a Canvas while Three.js draws a shaded sphere on a separate layer.