Optional ReadonlycornersAs CpuMeshBvhOptions.corners. 'positions' builds indexed triangles directly (tinybvh writes them). Default 'records'.
Optional ReadonlymaxLeaves with more triangles than this are cut in half until they fit. 1 to 8; default 8.
Optional ReadonlyonCalled with 0 before the build and 1 after it. tinybvh builds in one call into WebAssembly and reports nothing in between.
Options of CpuMeshBvh.build and CpuMeshBvh.create.