Parting lines enable visible and invisible parts of a geometric model to be separated in a given direction. In this paper, parting lines were defined. The required mathematical models, and an algorithm for computation of parting lines were established. A method involving the use of this concept in the manufacture of a model by Stratoconception was described. Compared with conventional methods, this concept achieves a higher accuracy. KEYWORDS: Parting line; Visibility; Polyhedron; STL; Rapid prototyping; Stratoconception Yves HOUTMANN, Benoit DELEBECQUE, Geoffroy LAUVAUX, Claude BARLIER
