/// BVH-accelerated ray picking.
pub
/// CPU-side edge-walk isoline (contour line) extraction from triangulated surfaces.
/// CPU-side marching cubes isosurface extraction from volumetric data.
/// Geometry primitives: cube, sphere, plane, cylinder, cone, capsule, torus, icosphere, arrow, disk, frustum, hemisphere, ring, ellipsoid, spring, grid_plane.