package Ġnet . d ink la . ray tracer . objects . acceleration Ċ Ċ import Ġnet . d ink la . ray tracer . objects . compound . Compound Ċ import Ġnet . d ink la . ray tracer . objects . mesh . Mesh Ċ Ċ abstract Ġclass ĠCompound With Mesh Ġ: ĠCompound () Ġ{ ĊĠĠĠ Ġval Ġmesh Ġ= ĠMesh () Ċ } ĊĊ