Contact defining device, contact defining method, and non-transitory computer readable storage medium

A contact defining device includes: a component moving unit that moves a component represented by data of a surface region in a 3D model in a predetermined direction; an overlap determination unit that determines whether or not the surface region of the component moved by the component moving unit includes an overlapping area that overlaps the surface region of another component; and a contact defining unit that, when a determination is made by the overlap determination unit that the surface region of the component includes the overlapping area that overlaps the surface region of another component, defines the overlapping area as a contact area with the another component.