Spherical, hyperbolic, and Euclidean triangle patches stacked together, with a fourth surface oscillating between all three curvatures
A spherical cap, hyperboloid, and flat plane — each carrying a matching geodesic triangle — stacked vertically to compare positive, negative, and zero curvature side by side. A fourth transitional surface oscillates continuously between all three.
Controls: Click and drag to orbit, scroll to zoom.
