pub fn box_grid_scenes<S: Scalar>() -> Vec<TestScene<S>>Expand description
Two unit cubes: one fixed at the origin, the other swept across every
combination of [-1, -0.5, 0, 0.5, 1] along each axis (125 scenes) —
covering every axis-aligned relative position from fully disjoint through
every partial-overlap and face/edge/corner-coincident configuration.